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libnetlink: Rename rtnl_wilddump_stats_req_filter to rtnl_statsdump_req_filter
[mirror_iproute2.git] / misc / ss.c
1 /*
2 * ss.c "sockstat", socket statistics
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 */
11
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <unistd.h>
15 #include <fcntl.h>
16 #include <sys/ioctl.h>
17 #include <sys/socket.h>
18 #include <sys/uio.h>
19 #include <sys/sysmacros.h>
20 #include <netinet/in.h>
21 #include <string.h>
22 #include <errno.h>
23 #include <netdb.h>
24 #include <arpa/inet.h>
25 #include <dirent.h>
26 #include <fnmatch.h>
27 #include <getopt.h>
28 #include <stdbool.h>
29 #include <limits.h>
30 #include <stdarg.h>
31
32 #include "utils.h"
33 #include "rt_names.h"
34 #include "ll_map.h"
35 #include "libnetlink.h"
36 #include "namespace.h"
37 #include "SNAPSHOT.h"
38
39 #include <linux/tcp.h>
40 #include <linux/sock_diag.h>
41 #include <linux/inet_diag.h>
42 #include <linux/unix_diag.h>
43 #include <linux/netdevice.h> /* for MAX_ADDR_LEN */
44 #include <linux/filter.h>
45 #include <linux/packet_diag.h>
46 #include <linux/netlink_diag.h>
47 #include <linux/sctp.h>
48 #include <linux/vm_sockets_diag.h>
49 #include <linux/net.h>
50 #include <linux/tipc.h>
51 #include <linux/tipc_netlink.h>
52 #include <linux/tipc_sockets_diag.h>
53
54 #define MAGIC_SEQ 123456
55 #define BUF_CHUNK (1024 * 1024)
56 #define LEN_ALIGN(x) (((x) + 1) & ~1)
57
58 #define DIAG_REQUEST(_req, _r) \
59 struct { \
60 struct nlmsghdr nlh; \
61 _r; \
62 } _req = { \
63 .nlh = { \
64 .nlmsg_type = SOCK_DIAG_BY_FAMILY, \
65 .nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST,\
66 .nlmsg_seq = MAGIC_SEQ, \
67 .nlmsg_len = sizeof(_req), \
68 }, \
69 }
70
71 #if HAVE_SELINUX
72 #include <selinux/selinux.h>
73 #else
74 /* Stubs for SELinux functions */
75 static int is_selinux_enabled(void)
76 {
77 return -1;
78 }
79
80 static int getpidcon(pid_t pid, char **context)
81 {
82 *context = NULL;
83 return -1;
84 }
85
86 static int getfilecon(char *path, char **context)
87 {
88 *context = NULL;
89 return -1;
90 }
91
92 static int security_get_initial_context(char *name, char **context)
93 {
94 *context = NULL;
95 return -1;
96 }
97 #endif
98
99 int resolve_services = 1;
100 int preferred_family = AF_UNSPEC;
101 int show_options;
102 int show_details;
103 int show_users;
104 int show_mem;
105 int show_tcpinfo;
106 int show_bpf;
107 int show_proc_ctx;
108 int show_sock_ctx;
109 int show_header = 1;
110 int follow_events;
111 int sctp_ino;
112 int show_tipcinfo;
113
114 enum col_id {
115 COL_NETID,
116 COL_STATE,
117 COL_RECVQ,
118 COL_SENDQ,
119 COL_ADDR,
120 COL_SERV,
121 COL_RADDR,
122 COL_RSERV,
123 COL_EXT,
124 COL_MAX
125 };
126
127 enum col_align {
128 ALIGN_LEFT,
129 ALIGN_CENTER,
130 ALIGN_RIGHT
131 };
132
133 struct column {
134 const enum col_align align;
135 const char *header;
136 const char *ldelim;
137 int disabled;
138 int width; /* Calculated, including additional layout spacing */
139 int max_len; /* Measured maximum field length in this column */
140 };
141
142 static struct column columns[] = {
143 { ALIGN_LEFT, "Netid", "", 0, 0, 0 },
144 { ALIGN_LEFT, "State", " ", 0, 0, 0 },
145 { ALIGN_LEFT, "Recv-Q", " ", 0, 0, 0 },
146 { ALIGN_LEFT, "Send-Q", " ", 0, 0, 0 },
147 { ALIGN_RIGHT, "Local Address:", " ", 0, 0, 0 },
148 { ALIGN_LEFT, "Port", "", 0, 0, 0 },
149 { ALIGN_RIGHT, "Peer Address:", " ", 0, 0, 0 },
150 { ALIGN_LEFT, "Port", "", 0, 0, 0 },
151 { ALIGN_LEFT, "", "", 0, 0, 0 },
152 };
153
154 static struct column *current_field = columns;
155
156 /* Output buffer: chained chunks of BUF_CHUNK bytes. Each field is written to
157 * the buffer as a variable size token. A token consists of a 16 bits length
158 * field, followed by a string which is not NULL-terminated.
159 *
160 * A new chunk is allocated and linked when the current chunk doesn't have
161 * enough room to store the current token as a whole.
162 */
163 struct buf_chunk {
164 struct buf_chunk *next; /* Next chained chunk */
165 char *end; /* Current end of content */
166 char data[0];
167 };
168
169 struct buf_token {
170 uint16_t len; /* Data length, excluding length descriptor */
171 char data[0];
172 };
173
174 static struct {
175 struct buf_token *cur; /* Position of current token in chunk */
176 struct buf_chunk *head; /* First chunk */
177 struct buf_chunk *tail; /* Current chunk */
178 } buffer;
179
180 static const char *TCP_PROTO = "tcp";
181 static const char *SCTP_PROTO = "sctp";
182 static const char *UDP_PROTO = "udp";
183 static const char *RAW_PROTO = "raw";
184 static const char *dg_proto;
185
186 enum {
187 TCP_DB,
188 DCCP_DB,
189 UDP_DB,
190 RAW_DB,
191 UNIX_DG_DB,
192 UNIX_ST_DB,
193 UNIX_SQ_DB,
194 PACKET_DG_DB,
195 PACKET_R_DB,
196 NETLINK_DB,
197 SCTP_DB,
198 VSOCK_ST_DB,
199 VSOCK_DG_DB,
200 TIPC_DB,
201 MAX_DB
202 };
203
204 #define PACKET_DBM ((1<<PACKET_DG_DB)|(1<<PACKET_R_DB))
205 #define UNIX_DBM ((1<<UNIX_DG_DB)|(1<<UNIX_ST_DB)|(1<<UNIX_SQ_DB))
206 #define ALL_DB ((1<<MAX_DB)-1)
207 #define INET_L4_DBM ((1<<TCP_DB)|(1<<UDP_DB)|(1<<DCCP_DB)|(1<<SCTP_DB))
208 #define INET_DBM (INET_L4_DBM | (1<<RAW_DB))
209 #define VSOCK_DBM ((1<<VSOCK_ST_DB)|(1<<VSOCK_DG_DB))
210
211 enum {
212 SS_UNKNOWN,
213 SS_ESTABLISHED,
214 SS_SYN_SENT,
215 SS_SYN_RECV,
216 SS_FIN_WAIT1,
217 SS_FIN_WAIT2,
218 SS_TIME_WAIT,
219 SS_CLOSE,
220 SS_CLOSE_WAIT,
221 SS_LAST_ACK,
222 SS_LISTEN,
223 SS_CLOSING,
224 SS_MAX
225 };
226
227 enum {
228 SCTP_STATE_CLOSED = 0,
229 SCTP_STATE_COOKIE_WAIT = 1,
230 SCTP_STATE_COOKIE_ECHOED = 2,
231 SCTP_STATE_ESTABLISHED = 3,
232 SCTP_STATE_SHUTDOWN_PENDING = 4,
233 SCTP_STATE_SHUTDOWN_SENT = 5,
234 SCTP_STATE_SHUTDOWN_RECEIVED = 6,
235 SCTP_STATE_SHUTDOWN_ACK_SENT = 7,
236 };
237
238 #define SS_ALL ((1 << SS_MAX) - 1)
239 #define SS_CONN (SS_ALL & ~((1<<SS_LISTEN)|(1<<SS_CLOSE)|(1<<SS_TIME_WAIT)|(1<<SS_SYN_RECV)))
240 #define TIPC_SS_CONN ((1<<SS_ESTABLISHED)|(1<<SS_LISTEN)|(1<<SS_CLOSE))
241
242 #include "ssfilter.h"
243
244 struct filter {
245 int dbs;
246 int states;
247 uint64_t families;
248 struct ssfilter *f;
249 bool kill;
250 struct rtnl_handle *rth_for_killing;
251 };
252
253 #define FAMILY_MASK(family) ((uint64_t)1 << (family))
254
255 static const struct filter default_dbs[MAX_DB] = {
256 [TCP_DB] = {
257 .states = SS_CONN,
258 .families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
259 },
260 [DCCP_DB] = {
261 .states = SS_CONN,
262 .families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
263 },
264 [UDP_DB] = {
265 .states = (1 << SS_ESTABLISHED),
266 .families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
267 },
268 [RAW_DB] = {
269 .states = (1 << SS_ESTABLISHED),
270 .families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
271 },
272 [UNIX_DG_DB] = {
273 .states = (1 << SS_CLOSE),
274 .families = FAMILY_MASK(AF_UNIX),
275 },
276 [UNIX_ST_DB] = {
277 .states = SS_CONN,
278 .families = FAMILY_MASK(AF_UNIX),
279 },
280 [UNIX_SQ_DB] = {
281 .states = SS_CONN,
282 .families = FAMILY_MASK(AF_UNIX),
283 },
284 [PACKET_DG_DB] = {
285 .states = (1 << SS_CLOSE),
286 .families = FAMILY_MASK(AF_PACKET),
287 },
288 [PACKET_R_DB] = {
289 .states = (1 << SS_CLOSE),
290 .families = FAMILY_MASK(AF_PACKET),
291 },
292 [NETLINK_DB] = {
293 .states = (1 << SS_CLOSE),
294 .families = FAMILY_MASK(AF_NETLINK),
295 },
296 [SCTP_DB] = {
297 .states = SS_CONN,
298 .families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
299 },
300 [VSOCK_ST_DB] = {
301 .states = SS_CONN,
302 .families = FAMILY_MASK(AF_VSOCK),
303 },
304 [VSOCK_DG_DB] = {
305 .states = SS_CONN,
306 .families = FAMILY_MASK(AF_VSOCK),
307 },
308 [TIPC_DB] = {
309 .states = TIPC_SS_CONN,
310 .families = FAMILY_MASK(AF_TIPC),
311 },
312 };
313
314 static const struct filter default_afs[AF_MAX] = {
315 [AF_INET] = {
316 .dbs = INET_DBM,
317 .states = SS_CONN,
318 },
319 [AF_INET6] = {
320 .dbs = INET_DBM,
321 .states = SS_CONN,
322 },
323 [AF_UNIX] = {
324 .dbs = UNIX_DBM,
325 .states = SS_CONN,
326 },
327 [AF_PACKET] = {
328 .dbs = PACKET_DBM,
329 .states = (1 << SS_CLOSE),
330 },
331 [AF_NETLINK] = {
332 .dbs = (1 << NETLINK_DB),
333 .states = (1 << SS_CLOSE),
334 },
335 [AF_VSOCK] = {
336 .dbs = VSOCK_DBM,
337 .states = SS_CONN,
338 },
339 [AF_TIPC] = {
340 .dbs = (1 << TIPC_DB),
341 .states = TIPC_SS_CONN,
342 },
343 };
344
345 static int do_default = 1;
346 static struct filter current_filter;
347
348 static void filter_db_set(struct filter *f, int db, bool enable)
349 {
350 if (enable) {
351 f->states |= default_dbs[db].states;
352 f->dbs |= 1 << db;
353 } else {
354 f->dbs &= ~(1 << db);
355 }
356 do_default = 0;
357 }
358
359 static int filter_db_parse(struct filter *f, const char *s)
360 {
361 const struct {
362 const char *name;
363 int dbs[MAX_DB + 1];
364 } db_name_tbl[] = {
365 #define ENTRY(name, ...) { #name, { __VA_ARGS__, MAX_DB } }
366 ENTRY(all, UDP_DB, DCCP_DB, TCP_DB, RAW_DB,
367 UNIX_ST_DB, UNIX_DG_DB, UNIX_SQ_DB,
368 PACKET_R_DB, PACKET_DG_DB, NETLINK_DB,
369 SCTP_DB, VSOCK_ST_DB, VSOCK_DG_DB),
370 ENTRY(inet, UDP_DB, DCCP_DB, TCP_DB, SCTP_DB, RAW_DB),
371 ENTRY(udp, UDP_DB),
372 ENTRY(dccp, DCCP_DB),
373 ENTRY(tcp, TCP_DB),
374 ENTRY(sctp, SCTP_DB),
375 ENTRY(raw, RAW_DB),
376 ENTRY(unix, UNIX_ST_DB, UNIX_DG_DB, UNIX_SQ_DB),
377 ENTRY(unix_stream, UNIX_ST_DB),
378 ENTRY(u_str, UNIX_ST_DB), /* alias for unix_stream */
379 ENTRY(unix_dgram, UNIX_DG_DB),
380 ENTRY(u_dgr, UNIX_DG_DB), /* alias for unix_dgram */
381 ENTRY(unix_seqpacket, UNIX_SQ_DB),
382 ENTRY(u_seq, UNIX_SQ_DB), /* alias for unix_seqpacket */
383 ENTRY(packet, PACKET_R_DB, PACKET_DG_DB),
384 ENTRY(packet_raw, PACKET_R_DB),
385 ENTRY(p_raw, PACKET_R_DB), /* alias for packet_raw */
386 ENTRY(packet_dgram, PACKET_DG_DB),
387 ENTRY(p_dgr, PACKET_DG_DB), /* alias for packet_dgram */
388 ENTRY(netlink, NETLINK_DB),
389 ENTRY(vsock, VSOCK_ST_DB, VSOCK_DG_DB),
390 ENTRY(vsock_stream, VSOCK_ST_DB),
391 ENTRY(v_str, VSOCK_ST_DB), /* alias for vsock_stream */
392 ENTRY(vsock_dgram, VSOCK_DG_DB),
393 ENTRY(v_dgr, VSOCK_DG_DB), /* alias for vsock_dgram */
394 #undef ENTRY
395 };
396 bool enable = true;
397 unsigned int i;
398 const int *dbp;
399
400 if (s[0] == '!') {
401 enable = false;
402 s++;
403 }
404 for (i = 0; i < ARRAY_SIZE(db_name_tbl); i++) {
405 if (strcmp(s, db_name_tbl[i].name))
406 continue;
407 for (dbp = db_name_tbl[i].dbs; *dbp != MAX_DB; dbp++)
408 filter_db_set(f, *dbp, enable);
409 return 0;
410 }
411 return -1;
412 }
413
414 static void filter_af_set(struct filter *f, int af)
415 {
416 f->states |= default_afs[af].states;
417 f->families |= FAMILY_MASK(af);
418 do_default = 0;
419 preferred_family = af;
420 }
421
422 static int filter_af_get(struct filter *f, int af)
423 {
424 return !!(f->families & FAMILY_MASK(af));
425 }
426
427 static void filter_states_set(struct filter *f, int states)
428 {
429 if (states)
430 f->states = states;
431 }
432
433 static void filter_merge_defaults(struct filter *f)
434 {
435 int db;
436 int af;
437
438 for (db = 0; db < MAX_DB; db++) {
439 if (!(f->dbs & (1 << db)))
440 continue;
441
442 if (!(default_dbs[db].families & f->families))
443 f->families |= default_dbs[db].families;
444 }
445 for (af = 0; af < AF_MAX; af++) {
446 if (!(f->families & FAMILY_MASK(af)))
447 continue;
448
449 if (!(default_afs[af].dbs & f->dbs))
450 f->dbs |= default_afs[af].dbs;
451 }
452 }
453
454 static FILE *generic_proc_open(const char *env, const char *name)
455 {
456 const char *p = getenv(env);
457 char store[128];
458
459 if (!p) {
460 p = getenv("PROC_ROOT") ? : "/proc";
461 snprintf(store, sizeof(store)-1, "%s/%s", p, name);
462 p = store;
463 }
464
465 return fopen(p, "r");
466 }
467 #define net_tcp_open() generic_proc_open("PROC_NET_TCP", "net/tcp")
468 #define net_tcp6_open() generic_proc_open("PROC_NET_TCP6", "net/tcp6")
469 #define net_udp_open() generic_proc_open("PROC_NET_UDP", "net/udp")
470 #define net_udp6_open() generic_proc_open("PROC_NET_UDP6", "net/udp6")
471 #define net_raw_open() generic_proc_open("PROC_NET_RAW", "net/raw")
472 #define net_raw6_open() generic_proc_open("PROC_NET_RAW6", "net/raw6")
473 #define net_unix_open() generic_proc_open("PROC_NET_UNIX", "net/unix")
474 #define net_packet_open() generic_proc_open("PROC_NET_PACKET", \
475 "net/packet")
476 #define net_netlink_open() generic_proc_open("PROC_NET_NETLINK", \
477 "net/netlink")
478 #define net_sockstat_open() generic_proc_open("PROC_NET_SOCKSTAT", \
479 "net/sockstat")
480 #define net_sockstat6_open() generic_proc_open("PROC_NET_SOCKSTAT6", \
481 "net/sockstat6")
482 #define net_snmp_open() generic_proc_open("PROC_NET_SNMP", "net/snmp")
483 #define ephemeral_ports_open() generic_proc_open("PROC_IP_LOCAL_PORT_RANGE", \
484 "sys/net/ipv4/ip_local_port_range")
485
486 struct user_ent {
487 struct user_ent *next;
488 unsigned int ino;
489 int pid;
490 int fd;
491 char *process;
492 char *process_ctx;
493 char *socket_ctx;
494 };
495
496 #define USER_ENT_HASH_SIZE 256
497 struct user_ent *user_ent_hash[USER_ENT_HASH_SIZE];
498
499 static int user_ent_hashfn(unsigned int ino)
500 {
501 int val = (ino >> 24) ^ (ino >> 16) ^ (ino >> 8) ^ ino;
502
503 return val & (USER_ENT_HASH_SIZE - 1);
504 }
505
506 static void user_ent_add(unsigned int ino, char *process,
507 int pid, int fd,
508 char *proc_ctx,
509 char *sock_ctx)
510 {
511 struct user_ent *p, **pp;
512
513 p = malloc(sizeof(struct user_ent));
514 if (!p) {
515 fprintf(stderr, "ss: failed to malloc buffer\n");
516 abort();
517 }
518 p->next = NULL;
519 p->ino = ino;
520 p->pid = pid;
521 p->fd = fd;
522 p->process = strdup(process);
523 p->process_ctx = strdup(proc_ctx);
524 p->socket_ctx = strdup(sock_ctx);
525
526 pp = &user_ent_hash[user_ent_hashfn(ino)];
527 p->next = *pp;
528 *pp = p;
529 }
530
531 static void user_ent_destroy(void)
532 {
533 struct user_ent *p, *p_next;
534 int cnt = 0;
535
536 while (cnt != USER_ENT_HASH_SIZE) {
537 p = user_ent_hash[cnt];
538 while (p) {
539 free(p->process);
540 free(p->process_ctx);
541 free(p->socket_ctx);
542 p_next = p->next;
543 free(p);
544 p = p_next;
545 }
546 cnt++;
547 }
548 }
549
550 static void user_ent_hash_build(void)
551 {
552 const char *root = getenv("PROC_ROOT") ? : "/proc/";
553 struct dirent *d;
554 char name[1024];
555 int nameoff;
556 DIR *dir;
557 char *pid_context;
558 char *sock_context;
559 const char *no_ctx = "unavailable";
560 static int user_ent_hash_build_init;
561
562 /* If show_users & show_proc_ctx set only do this once */
563 if (user_ent_hash_build_init != 0)
564 return;
565
566 user_ent_hash_build_init = 1;
567
568 strlcpy(name, root, sizeof(name));
569
570 if (strlen(name) == 0 || name[strlen(name)-1] != '/')
571 strcat(name, "/");
572
573 nameoff = strlen(name);
574
575 dir = opendir(name);
576 if (!dir)
577 return;
578
579 while ((d = readdir(dir)) != NULL) {
580 struct dirent *d1;
581 char process[16];
582 char *p;
583 int pid, pos;
584 DIR *dir1;
585 char crap;
586
587 if (sscanf(d->d_name, "%d%c", &pid, &crap) != 1)
588 continue;
589
590 if (getpidcon(pid, &pid_context) != 0)
591 pid_context = strdup(no_ctx);
592
593 snprintf(name + nameoff, sizeof(name) - nameoff, "%d/fd/", pid);
594 pos = strlen(name);
595 if ((dir1 = opendir(name)) == NULL) {
596 free(pid_context);
597 continue;
598 }
599
600 process[0] = '\0';
601 p = process;
602
603 while ((d1 = readdir(dir1)) != NULL) {
604 const char *pattern = "socket:[";
605 unsigned int ino;
606 char lnk[64];
607 int fd;
608 ssize_t link_len;
609 char tmp[1024];
610
611 if (sscanf(d1->d_name, "%d%c", &fd, &crap) != 1)
612 continue;
613
614 snprintf(name+pos, sizeof(name) - pos, "%d", fd);
615
616 link_len = readlink(name, lnk, sizeof(lnk)-1);
617 if (link_len == -1)
618 continue;
619 lnk[link_len] = '\0';
620
621 if (strncmp(lnk, pattern, strlen(pattern)))
622 continue;
623
624 sscanf(lnk, "socket:[%u]", &ino);
625
626 snprintf(tmp, sizeof(tmp), "%s/%d/fd/%s",
627 root, pid, d1->d_name);
628
629 if (getfilecon(tmp, &sock_context) <= 0)
630 sock_context = strdup(no_ctx);
631
632 if (*p == '\0') {
633 FILE *fp;
634
635 snprintf(tmp, sizeof(tmp), "%s/%d/stat",
636 root, pid);
637 if ((fp = fopen(tmp, "r")) != NULL) {
638 if (fscanf(fp, "%*d (%[^)])", p) < 1)
639 ; /* ignore */
640 fclose(fp);
641 }
642 }
643 user_ent_add(ino, p, pid, fd,
644 pid_context, sock_context);
645 free(sock_context);
646 }
647 free(pid_context);
648 closedir(dir1);
649 }
650 closedir(dir);
651 }
652
653 enum entry_types {
654 USERS,
655 PROC_CTX,
656 PROC_SOCK_CTX
657 };
658
659 #define ENTRY_BUF_SIZE 512
660 static int find_entry(unsigned int ino, char **buf, int type)
661 {
662 struct user_ent *p;
663 int cnt = 0;
664 char *ptr;
665 char *new_buf;
666 int len, new_buf_len;
667 int buf_used = 0;
668 int buf_len = 0;
669
670 if (!ino)
671 return 0;
672
673 p = user_ent_hash[user_ent_hashfn(ino)];
674 ptr = *buf = NULL;
675 while (p) {
676 if (p->ino != ino)
677 goto next;
678
679 while (1) {
680 ptr = *buf + buf_used;
681 switch (type) {
682 case USERS:
683 len = snprintf(ptr, buf_len - buf_used,
684 "(\"%s\",pid=%d,fd=%d),",
685 p->process, p->pid, p->fd);
686 break;
687 case PROC_CTX:
688 len = snprintf(ptr, buf_len - buf_used,
689 "(\"%s\",pid=%d,proc_ctx=%s,fd=%d),",
690 p->process, p->pid,
691 p->process_ctx, p->fd);
692 break;
693 case PROC_SOCK_CTX:
694 len = snprintf(ptr, buf_len - buf_used,
695 "(\"%s\",pid=%d,proc_ctx=%s,fd=%d,sock_ctx=%s),",
696 p->process, p->pid,
697 p->process_ctx, p->fd,
698 p->socket_ctx);
699 break;
700 default:
701 fprintf(stderr, "ss: invalid type: %d\n", type);
702 abort();
703 }
704
705 if (len < 0 || len >= buf_len - buf_used) {
706 new_buf_len = buf_len + ENTRY_BUF_SIZE;
707 new_buf = realloc(*buf, new_buf_len);
708 if (!new_buf) {
709 fprintf(stderr, "ss: failed to malloc buffer\n");
710 abort();
711 }
712 *buf = new_buf;
713 buf_len = new_buf_len;
714 continue;
715 } else {
716 buf_used += len;
717 break;
718 }
719 }
720 cnt++;
721 next:
722 p = p->next;
723 }
724 if (buf_used) {
725 ptr = *buf + buf_used;
726 ptr[-1] = '\0';
727 }
728 return cnt;
729 }
730
731 static unsigned long long cookie_sk_get(const uint32_t *cookie)
732 {
733 return (((unsigned long long)cookie[1] << 31) << 1) | cookie[0];
734 }
735
736 static const char *sctp_sstate_name[] = {
737 [SCTP_STATE_CLOSED] = "CLOSED",
738 [SCTP_STATE_COOKIE_WAIT] = "COOKIE_WAIT",
739 [SCTP_STATE_COOKIE_ECHOED] = "COOKIE_ECHOED",
740 [SCTP_STATE_ESTABLISHED] = "ESTAB",
741 [SCTP_STATE_SHUTDOWN_PENDING] = "SHUTDOWN_PENDING",
742 [SCTP_STATE_SHUTDOWN_SENT] = "SHUTDOWN_SENT",
743 [SCTP_STATE_SHUTDOWN_RECEIVED] = "SHUTDOWN_RECEIVED",
744 [SCTP_STATE_SHUTDOWN_ACK_SENT] = "ACK_SENT",
745 };
746
747 static const char * const stype_nameg[] = {
748 "UNKNOWN",
749 [SOCK_STREAM] = "STREAM",
750 [SOCK_DGRAM] = "DGRAM",
751 [SOCK_RDM] = "RDM",
752 [SOCK_SEQPACKET] = "SEQPACKET",
753 };
754
755 struct sockstat {
756 struct sockstat *next;
757 unsigned int type;
758 uint16_t prot;
759 uint16_t raw_prot;
760 inet_prefix local;
761 inet_prefix remote;
762 int lport;
763 int rport;
764 int state;
765 int rq, wq;
766 unsigned int ino;
767 unsigned int uid;
768 int refcnt;
769 unsigned int iface;
770 unsigned long long sk;
771 char *name;
772 char *peer_name;
773 __u32 mark;
774 };
775
776 struct dctcpstat {
777 unsigned int ce_state;
778 unsigned int alpha;
779 unsigned int ab_ecn;
780 unsigned int ab_tot;
781 bool enabled;
782 };
783
784 struct tcpstat {
785 struct sockstat ss;
786 unsigned int timer;
787 unsigned int timeout;
788 int probes;
789 char cong_alg[16];
790 double rto, ato, rtt, rttvar;
791 int qack, ssthresh, backoff;
792 double send_bps;
793 int snd_wscale;
794 int rcv_wscale;
795 int mss;
796 int rcv_mss;
797 int advmss;
798 unsigned int pmtu;
799 unsigned int cwnd;
800 unsigned int lastsnd;
801 unsigned int lastrcv;
802 unsigned int lastack;
803 double pacing_rate;
804 double pacing_rate_max;
805 double delivery_rate;
806 unsigned long long bytes_acked;
807 unsigned long long bytes_received;
808 unsigned int segs_out;
809 unsigned int segs_in;
810 unsigned int data_segs_out;
811 unsigned int data_segs_in;
812 unsigned int unacked;
813 unsigned int retrans;
814 unsigned int retrans_total;
815 unsigned int lost;
816 unsigned int sacked;
817 unsigned int fackets;
818 unsigned int reordering;
819 unsigned int not_sent;
820 double rcv_rtt;
821 double min_rtt;
822 int rcv_space;
823 unsigned int rcv_ssthresh;
824 unsigned long long busy_time;
825 unsigned long long rwnd_limited;
826 unsigned long long sndbuf_limited;
827 bool has_ts_opt;
828 bool has_sack_opt;
829 bool has_ecn_opt;
830 bool has_ecnseen_opt;
831 bool has_fastopen_opt;
832 bool has_wscale_opt;
833 bool app_limited;
834 struct dctcpstat *dctcp;
835 struct tcp_bbr_info *bbr_info;
836 };
837
838 /* SCTP assocs share the same inode number with their parent endpoint. So if we
839 * have seen the inode number before, it must be an assoc instead of the next
840 * endpoint. */
841 static bool is_sctp_assoc(struct sockstat *s, const char *sock_name)
842 {
843 if (strcmp(sock_name, "sctp"))
844 return false;
845 if (!sctp_ino || sctp_ino != s->ino)
846 return false;
847 return true;
848 }
849
850 static const char *unix_netid_name(int type)
851 {
852 switch (type) {
853 case SOCK_STREAM:
854 return "u_str";
855 case SOCK_SEQPACKET:
856 return "u_seq";
857 case SOCK_DGRAM:
858 default:
859 return "u_dgr";
860 }
861 }
862
863 static const char *proto_name(int protocol)
864 {
865 switch (protocol) {
866 case 0:
867 return "raw";
868 case IPPROTO_UDP:
869 return "udp";
870 case IPPROTO_TCP:
871 return "tcp";
872 case IPPROTO_SCTP:
873 return "sctp";
874 case IPPROTO_DCCP:
875 return "dccp";
876 case IPPROTO_ICMPV6:
877 return "icmp6";
878 }
879
880 return "???";
881 }
882
883 static const char *vsock_netid_name(int type)
884 {
885 switch (type) {
886 case SOCK_STREAM:
887 return "v_str";
888 case SOCK_DGRAM:
889 return "v_dgr";
890 default:
891 return "???";
892 }
893 }
894
895 static const char *tipc_netid_name(int type)
896 {
897 switch (type) {
898 case SOCK_STREAM:
899 return "ti_st";
900 case SOCK_DGRAM:
901 return "ti_dg";
902 case SOCK_RDM:
903 return "ti_rd";
904 case SOCK_SEQPACKET:
905 return "ti_sq";
906 default:
907 return "???";
908 }
909 }
910
911 /* Allocate and initialize a new buffer chunk */
912 static struct buf_chunk *buf_chunk_new(void)
913 {
914 struct buf_chunk *new = malloc(BUF_CHUNK);
915
916 if (!new)
917 abort();
918
919 new->next = NULL;
920
921 /* This is also the last block */
922 buffer.tail = new;
923
924 /* Next token will be stored at the beginning of chunk data area, and
925 * its initial length is zero.
926 */
927 buffer.cur = (struct buf_token *)new->data;
928 buffer.cur->len = 0;
929
930 new->end = buffer.cur->data;
931
932 return new;
933 }
934
935 /* Return available tail room in given chunk */
936 static int buf_chunk_avail(struct buf_chunk *chunk)
937 {
938 return BUF_CHUNK - offsetof(struct buf_chunk, data) -
939 (chunk->end - chunk->data);
940 }
941
942 /* Update end pointer and token length, link new chunk if we hit the end of the
943 * current one. Return -EAGAIN if we got a new chunk, caller has to print again.
944 */
945 static int buf_update(int len)
946 {
947 struct buf_chunk *chunk = buffer.tail;
948 struct buf_token *t = buffer.cur;
949
950 /* Claim success if new content fits in the current chunk, and anyway
951 * if this is the first token in the chunk: in the latter case,
952 * allocating a new chunk won't help, so we'll just cut the output.
953 */
954 if ((len < buf_chunk_avail(chunk) && len != -1 /* glibc < 2.0.6 */) ||
955 t == (struct buf_token *)chunk->data) {
956 len = min(len, buf_chunk_avail(chunk));
957
958 /* Total field length can't exceed 2^16 bytes, cut as needed */
959 len = min(len, USHRT_MAX - t->len);
960
961 chunk->end += len;
962 t->len += len;
963 return 0;
964 }
965
966 /* Content truncated, time to allocate more */
967 chunk->next = buf_chunk_new();
968
969 /* Copy current token over to new chunk, including length descriptor */
970 memcpy(chunk->next->data, t, sizeof(t->len) + t->len);
971 chunk->next->end += t->len;
972
973 /* Discard partially written field in old chunk */
974 chunk->end -= t->len + sizeof(t->len);
975
976 return -EAGAIN;
977 }
978
979 /* Append content to buffer as part of the current field */
980 __attribute__((format(printf, 1, 2)))
981 static void out(const char *fmt, ...)
982 {
983 struct column *f = current_field;
984 va_list args;
985 char *pos;
986 int len;
987
988 if (f->disabled)
989 return;
990
991 if (!buffer.head)
992 buffer.head = buf_chunk_new();
993
994 again: /* Append to buffer: if we have a new chunk, print again */
995
996 pos = buffer.cur->data + buffer.cur->len;
997 va_start(args, fmt);
998
999 /* Limit to tail room. If we hit the limit, buf_update() will tell us */
1000 len = vsnprintf(pos, buf_chunk_avail(buffer.tail), fmt, args);
1001 va_end(args);
1002
1003 if (buf_update(len))
1004 goto again;
1005 }
1006
1007 static int print_left_spacing(struct column *f, int stored, int printed)
1008 {
1009 int s;
1010
1011 if (!f->width || f->align == ALIGN_LEFT)
1012 return 0;
1013
1014 s = f->width - stored - printed;
1015 if (f->align == ALIGN_CENTER)
1016 /* If count of total spacing is odd, shift right by one */
1017 s = (s + 1) / 2;
1018
1019 if (s > 0)
1020 return printf("%*c", s, ' ');
1021
1022 return 0;
1023 }
1024
1025 static void print_right_spacing(struct column *f, int printed)
1026 {
1027 int s;
1028
1029 if (!f->width || f->align == ALIGN_RIGHT)
1030 return;
1031
1032 s = f->width - printed;
1033 if (f->align == ALIGN_CENTER)
1034 s /= 2;
1035
1036 if (s > 0)
1037 printf("%*c", s, ' ');
1038 }
1039
1040 /* Done with field: update buffer pointer, start new token after current one */
1041 static void field_flush(struct column *f)
1042 {
1043 struct buf_chunk *chunk;
1044 unsigned int pad;
1045
1046 if (f->disabled)
1047 return;
1048
1049 chunk = buffer.tail;
1050 pad = buffer.cur->len % 2;
1051
1052 if (buffer.cur->len > f->max_len)
1053 f->max_len = buffer.cur->len;
1054
1055 /* We need a new chunk if we can't store the next length descriptor.
1056 * Mind the gap between end of previous token and next aligned position
1057 * for length descriptor.
1058 */
1059 if (buf_chunk_avail(chunk) - pad < sizeof(buffer.cur->len)) {
1060 chunk->end += pad;
1061 chunk->next = buf_chunk_new();
1062 return;
1063 }
1064
1065 buffer.cur = (struct buf_token *)(buffer.cur->data +
1066 LEN_ALIGN(buffer.cur->len));
1067 buffer.cur->len = 0;
1068 buffer.tail->end = buffer.cur->data;
1069 }
1070
1071 static int field_is_last(struct column *f)
1072 {
1073 return f - columns == COL_MAX - 1;
1074 }
1075
1076 static void field_next(void)
1077 {
1078 field_flush(current_field);
1079
1080 if (field_is_last(current_field))
1081 current_field = columns;
1082 else
1083 current_field++;
1084 }
1085
1086 /* Walk through fields and flush them until we reach the desired one */
1087 static void field_set(enum col_id id)
1088 {
1089 while (id != current_field - columns)
1090 field_next();
1091 }
1092
1093 /* Print header for all non-empty columns */
1094 static void print_header(void)
1095 {
1096 while (!field_is_last(current_field)) {
1097 if (!current_field->disabled)
1098 out("%s", current_field->header);
1099 field_next();
1100 }
1101 }
1102
1103 /* Get the next available token in the buffer starting from the current token */
1104 static struct buf_token *buf_token_next(struct buf_token *cur)
1105 {
1106 struct buf_chunk *chunk = buffer.tail;
1107
1108 /* If we reached the end of chunk contents, get token from next chunk */
1109 if (cur->data + LEN_ALIGN(cur->len) == chunk->end) {
1110 buffer.tail = chunk = chunk->next;
1111 return chunk ? (struct buf_token *)chunk->data : NULL;
1112 }
1113
1114 return (struct buf_token *)(cur->data + LEN_ALIGN(cur->len));
1115 }
1116
1117 /* Free up all allocated buffer chunks */
1118 static void buf_free_all(void)
1119 {
1120 struct buf_chunk *tmp;
1121
1122 for (buffer.tail = buffer.head; buffer.tail; ) {
1123 tmp = buffer.tail;
1124 buffer.tail = buffer.tail->next;
1125 free(tmp);
1126 }
1127 buffer.head = NULL;
1128 }
1129
1130 /* Get current screen width, default to 80 columns if TIOCGWINSZ fails */
1131 static int render_screen_width(void)
1132 {
1133 int width = 80;
1134
1135 if (isatty(STDOUT_FILENO)) {
1136 struct winsize w;
1137
1138 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) != -1) {
1139 if (w.ws_col > 0)
1140 width = w.ws_col;
1141 }
1142 }
1143
1144 return width;
1145 }
1146
1147 /* Calculate column width from contents length. If columns don't fit on one
1148 * line, break them into the least possible amount of lines and keep them
1149 * aligned across lines. Available screen space is equally spread between fields
1150 * as additional spacing.
1151 */
1152 static void render_calc_width(void)
1153 {
1154 int screen_width = render_screen_width();
1155 struct column *c, *eol = columns - 1;
1156 int first, len = 0, linecols = 0;
1157
1158 /* First pass: set width for each column to measured content length */
1159 for (first = 1, c = columns; c - columns < COL_MAX; c++) {
1160 if (c->disabled)
1161 continue;
1162
1163 if (!first && c->max_len)
1164 c->width = c->max_len + strlen(c->ldelim);
1165 else
1166 c->width = c->max_len;
1167
1168 /* But don't exceed screen size. If we exceed the screen size
1169 * for even a single field, it will just start on a line of its
1170 * own and then naturally wrap.
1171 */
1172 c->width = min(c->width, screen_width);
1173
1174 if (c->width)
1175 first = 0;
1176 }
1177
1178 /* Second pass: find out newlines and distribute available spacing */
1179 for (c = columns; c - columns < COL_MAX; c++) {
1180 int pad, spacing, rem, last;
1181 struct column *tmp;
1182
1183 if (!c->width)
1184 continue;
1185
1186 linecols++;
1187 len += c->width;
1188
1189 for (last = 1, tmp = c + 1; tmp - columns < COL_MAX; tmp++) {
1190 if (tmp->width) {
1191 last = 0;
1192 break;
1193 }
1194 }
1195
1196 if (!last && len < screen_width) {
1197 /* Columns fit on screen so far, nothing to do yet */
1198 continue;
1199 }
1200
1201 if (len == screen_width) {
1202 /* Exact fit, just start with new line */
1203 goto newline;
1204 }
1205
1206 if (len > screen_width) {
1207 /* Screen width exceeded: go back one column */
1208 len -= c->width;
1209 c--;
1210 linecols--;
1211 }
1212
1213 /* Distribute remaining space to columns on this line */
1214 pad = screen_width - len;
1215 spacing = pad / linecols;
1216 rem = pad % linecols;
1217 for (tmp = c; tmp > eol; tmp--) {
1218 if (!tmp->width)
1219 continue;
1220
1221 tmp->width += spacing;
1222 if (rem) {
1223 tmp->width++;
1224 rem--;
1225 }
1226 }
1227
1228 newline:
1229 /* Line break: reset line counters, mark end-of-line */
1230 eol = c;
1231 len = 0;
1232 linecols = 0;
1233 }
1234 }
1235
1236 /* Render buffered output with spacing and delimiters, then free up buffers */
1237 static void render(void)
1238 {
1239 struct buf_token *token;
1240 int printed, line_started = 0;
1241 struct column *f;
1242
1243 if (!buffer.head)
1244 return;
1245
1246 token = (struct buf_token *)buffer.head->data;
1247
1248 /* Ensure end alignment of last token, it wasn't necessarily flushed */
1249 buffer.tail->end += buffer.cur->len % 2;
1250
1251 render_calc_width();
1252
1253 /* Rewind and replay */
1254 buffer.tail = buffer.head;
1255
1256 f = columns;
1257 while (!f->width)
1258 f++;
1259
1260 while (token) {
1261 /* Print left delimiter only if we already started a line */
1262 if (line_started++)
1263 printed = printf("%s", current_field->ldelim);
1264 else
1265 printed = 0;
1266
1267 /* Print field content from token data with spacing */
1268 printed += print_left_spacing(f, token->len, printed);
1269 printed += fwrite(token->data, 1, token->len, stdout);
1270 print_right_spacing(f, printed);
1271
1272 /* Go to next non-empty field, deal with end-of-line */
1273 do {
1274 if (field_is_last(f)) {
1275 printf("\n");
1276 f = columns;
1277 line_started = 0;
1278 } else {
1279 f++;
1280 }
1281 } while (f->disabled);
1282
1283 token = buf_token_next(token);
1284 }
1285
1286 buf_free_all();
1287 current_field = columns;
1288 }
1289
1290 static void sock_state_print(struct sockstat *s)
1291 {
1292 const char *sock_name;
1293 static const char * const sstate_name[] = {
1294 "UNKNOWN",
1295 [SS_ESTABLISHED] = "ESTAB",
1296 [SS_SYN_SENT] = "SYN-SENT",
1297 [SS_SYN_RECV] = "SYN-RECV",
1298 [SS_FIN_WAIT1] = "FIN-WAIT-1",
1299 [SS_FIN_WAIT2] = "FIN-WAIT-2",
1300 [SS_TIME_WAIT] = "TIME-WAIT",
1301 [SS_CLOSE] = "UNCONN",
1302 [SS_CLOSE_WAIT] = "CLOSE-WAIT",
1303 [SS_LAST_ACK] = "LAST-ACK",
1304 [SS_LISTEN] = "LISTEN",
1305 [SS_CLOSING] = "CLOSING",
1306 };
1307
1308 switch (s->local.family) {
1309 case AF_UNIX:
1310 sock_name = unix_netid_name(s->type);
1311 break;
1312 case AF_INET:
1313 case AF_INET6:
1314 sock_name = proto_name(s->type);
1315 break;
1316 case AF_PACKET:
1317 sock_name = s->type == SOCK_RAW ? "p_raw" : "p_dgr";
1318 break;
1319 case AF_NETLINK:
1320 sock_name = "nl";
1321 break;
1322 case AF_TIPC:
1323 sock_name = tipc_netid_name(s->type);
1324 break;
1325 case AF_VSOCK:
1326 sock_name = vsock_netid_name(s->type);
1327 break;
1328 default:
1329 sock_name = "unknown";
1330 }
1331
1332 if (is_sctp_assoc(s, sock_name)) {
1333 field_set(COL_STATE); /* Empty Netid field */
1334 out("`- %s", sctp_sstate_name[s->state]);
1335 } else {
1336 field_set(COL_NETID);
1337 out("%s", sock_name);
1338 field_set(COL_STATE);
1339 out("%s", sstate_name[s->state]);
1340 }
1341
1342 field_set(COL_RECVQ);
1343 out("%-6d", s->rq);
1344 field_set(COL_SENDQ);
1345 out("%-6d", s->wq);
1346 field_set(COL_ADDR);
1347 }
1348
1349 static void sock_details_print(struct sockstat *s)
1350 {
1351 if (s->uid)
1352 out(" uid:%u", s->uid);
1353
1354 out(" ino:%u", s->ino);
1355 out(" sk:%llx", s->sk);
1356
1357 if (s->mark)
1358 out(" fwmark:0x%x", s->mark);
1359 }
1360
1361 static void sock_addr_print(const char *addr, char *delim, const char *port,
1362 const char *ifname)
1363 {
1364 if (ifname)
1365 out("%s" "%%" "%s%s", addr, ifname, delim);
1366 else
1367 out("%s%s", addr, delim);
1368
1369 field_next();
1370 out("%s", port);
1371 field_next();
1372 }
1373
1374 static const char *print_ms_timer(unsigned int timeout)
1375 {
1376 static char buf[64];
1377 int secs, msecs, minutes;
1378
1379 secs = timeout/1000;
1380 minutes = secs/60;
1381 secs = secs%60;
1382 msecs = timeout%1000;
1383 buf[0] = 0;
1384 if (minutes) {
1385 msecs = 0;
1386 snprintf(buf, sizeof(buf)-16, "%dmin", minutes);
1387 if (minutes > 9)
1388 secs = 0;
1389 }
1390 if (secs) {
1391 if (secs > 9)
1392 msecs = 0;
1393 sprintf(buf+strlen(buf), "%d%s", secs, msecs ? "." : "sec");
1394 }
1395 if (msecs)
1396 sprintf(buf+strlen(buf), "%03dms", msecs);
1397 return buf;
1398 }
1399
1400 struct scache {
1401 struct scache *next;
1402 int port;
1403 char *name;
1404 const char *proto;
1405 };
1406
1407 struct scache *rlist;
1408
1409 static void init_service_resolver(void)
1410 {
1411 char buf[128];
1412 FILE *fp = popen("/usr/sbin/rpcinfo -p 2>/dev/null", "r");
1413
1414 if (!fp)
1415 return;
1416
1417 if (!fgets(buf, sizeof(buf), fp)) {
1418 pclose(fp);
1419 return;
1420 }
1421 while (fgets(buf, sizeof(buf), fp) != NULL) {
1422 unsigned int progn, port;
1423 char proto[128], prog[128] = "rpc.";
1424 struct scache *c;
1425
1426 if (sscanf(buf, "%u %*d %s %u %s",
1427 &progn, proto, &port, prog+4) != 4)
1428 continue;
1429
1430 if (!(c = malloc(sizeof(*c))))
1431 continue;
1432
1433 c->port = port;
1434 c->name = strdup(prog);
1435 if (strcmp(proto, TCP_PROTO) == 0)
1436 c->proto = TCP_PROTO;
1437 else if (strcmp(proto, UDP_PROTO) == 0)
1438 c->proto = UDP_PROTO;
1439 else if (strcmp(proto, SCTP_PROTO) == 0)
1440 c->proto = SCTP_PROTO;
1441 else
1442 c->proto = NULL;
1443 c->next = rlist;
1444 rlist = c;
1445 }
1446 pclose(fp);
1447 }
1448
1449 /* Even do not try default linux ephemeral port ranges:
1450 * default /etc/services contains so much of useless crap
1451 * wouldbe "allocated" to this area that resolution
1452 * is really harmful. I shrug each time when seeing
1453 * "socks" or "cfinger" in dumps.
1454 */
1455 static int is_ephemeral(int port)
1456 {
1457 static int min = 0, max;
1458
1459 if (!min) {
1460 FILE *f = ephemeral_ports_open();
1461
1462 if (!f || fscanf(f, "%d %d", &min, &max) < 2) {
1463 min = 1024;
1464 max = 4999;
1465 }
1466 if (f)
1467 fclose(f);
1468 }
1469 return port >= min && port <= max;
1470 }
1471
1472
1473 static const char *__resolve_service(int port)
1474 {
1475 struct scache *c;
1476
1477 for (c = rlist; c; c = c->next) {
1478 if (c->port == port && c->proto == dg_proto)
1479 return c->name;
1480 }
1481
1482 if (!is_ephemeral(port)) {
1483 static int notfirst;
1484 struct servent *se;
1485
1486 if (!notfirst) {
1487 setservent(1);
1488 notfirst = 1;
1489 }
1490 se = getservbyport(htons(port), dg_proto);
1491 if (se)
1492 return se->s_name;
1493 }
1494
1495 return NULL;
1496 }
1497
1498 #define SCACHE_BUCKETS 1024
1499 static struct scache *cache_htab[SCACHE_BUCKETS];
1500
1501 static const char *resolve_service(int port)
1502 {
1503 static char buf[128];
1504 struct scache *c;
1505 const char *res;
1506 int hash;
1507
1508 if (port == 0) {
1509 buf[0] = '*';
1510 buf[1] = 0;
1511 return buf;
1512 }
1513
1514 if (!resolve_services)
1515 goto do_numeric;
1516
1517 if (dg_proto == RAW_PROTO)
1518 return inet_proto_n2a(port, buf, sizeof(buf));
1519
1520
1521 hash = (port^(((unsigned long)dg_proto)>>2)) % SCACHE_BUCKETS;
1522
1523 for (c = cache_htab[hash]; c; c = c->next) {
1524 if (c->port == port && c->proto == dg_proto)
1525 goto do_cache;
1526 }
1527
1528 c = malloc(sizeof(*c));
1529 if (!c)
1530 goto do_numeric;
1531 res = __resolve_service(port);
1532 c->port = port;
1533 c->name = res ? strdup(res) : NULL;
1534 c->proto = dg_proto;
1535 c->next = cache_htab[hash];
1536 cache_htab[hash] = c;
1537
1538 do_cache:
1539 if (c->name)
1540 return c->name;
1541
1542 do_numeric:
1543 sprintf(buf, "%u", port);
1544 return buf;
1545 }
1546
1547 static void inet_addr_print(const inet_prefix *a, int port,
1548 unsigned int ifindex, bool v6only)
1549 {
1550 char buf[1024];
1551 const char *ap = buf;
1552 const char *ifname = NULL;
1553
1554 if (a->family == AF_INET) {
1555 ap = format_host(AF_INET, 4, a->data);
1556 } else {
1557 if (!v6only &&
1558 !memcmp(a->data, &in6addr_any, sizeof(in6addr_any))) {
1559 buf[0] = '*';
1560 buf[1] = 0;
1561 } else {
1562 ap = format_host(a->family, 16, a->data);
1563
1564 /* Numeric IPv6 addresses should be bracketed */
1565 if (strchr(ap, ':')) {
1566 snprintf(buf, sizeof(buf),
1567 "[%s]", ap);
1568 ap = buf;
1569 }
1570 }
1571 }
1572
1573 if (ifindex)
1574 ifname = ll_index_to_name(ifindex);
1575
1576 sock_addr_print(ap, ":", resolve_service(port), ifname);
1577 }
1578
1579 struct aafilter {
1580 inet_prefix addr;
1581 int port;
1582 unsigned int iface;
1583 __u32 mark;
1584 __u32 mask;
1585 struct aafilter *next;
1586 };
1587
1588 static int inet2_addr_match(const inet_prefix *a, const inet_prefix *p,
1589 int plen)
1590 {
1591 if (!inet_addr_match(a, p, plen))
1592 return 0;
1593
1594 /* Cursed "v4 mapped" addresses: v4 mapped socket matches
1595 * pure IPv4 rule, but v4-mapped rule selects only v4-mapped
1596 * sockets. Fair? */
1597 if (p->family == AF_INET && a->family == AF_INET6) {
1598 if (a->data[0] == 0 && a->data[1] == 0 &&
1599 a->data[2] == htonl(0xffff)) {
1600 inet_prefix tmp = *a;
1601
1602 tmp.data[0] = a->data[3];
1603 return inet_addr_match(&tmp, p, plen);
1604 }
1605 }
1606 return 1;
1607 }
1608
1609 static int unix_match(const inet_prefix *a, const inet_prefix *p)
1610 {
1611 char *addr, *pattern;
1612
1613 memcpy(&addr, a->data, sizeof(addr));
1614 memcpy(&pattern, p->data, sizeof(pattern));
1615 if (pattern == NULL)
1616 return 1;
1617 if (addr == NULL)
1618 addr = "";
1619 return !fnmatch(pattern, addr, 0);
1620 }
1621
1622 static int run_ssfilter(struct ssfilter *f, struct sockstat *s)
1623 {
1624 switch (f->type) {
1625 case SSF_S_AUTO:
1626 {
1627 if (s->local.family == AF_UNIX) {
1628 char *p;
1629
1630 memcpy(&p, s->local.data, sizeof(p));
1631 return p == NULL || (p[0] == '@' && strlen(p) == 6 &&
1632 strspn(p+1, "0123456789abcdef") == 5);
1633 }
1634 if (s->local.family == AF_PACKET)
1635 return s->lport == 0 && s->local.data[0] == 0;
1636 if (s->local.family == AF_NETLINK)
1637 return s->lport < 0;
1638 if (s->local.family == AF_VSOCK)
1639 return s->lport > 1023;
1640
1641 return is_ephemeral(s->lport);
1642 }
1643 case SSF_DCOND:
1644 {
1645 struct aafilter *a = (void *)f->pred;
1646
1647 if (a->addr.family == AF_UNIX)
1648 return unix_match(&s->remote, &a->addr);
1649 if (a->port != -1 && a->port != s->rport)
1650 return 0;
1651 if (a->addr.bitlen) {
1652 do {
1653 if (!inet2_addr_match(&s->remote, &a->addr, a->addr.bitlen))
1654 return 1;
1655 } while ((a = a->next) != NULL);
1656 return 0;
1657 }
1658 return 1;
1659 }
1660 case SSF_SCOND:
1661 {
1662 struct aafilter *a = (void *)f->pred;
1663
1664 if (a->addr.family == AF_UNIX)
1665 return unix_match(&s->local, &a->addr);
1666 if (a->port != -1 && a->port != s->lport)
1667 return 0;
1668 if (a->addr.bitlen) {
1669 do {
1670 if (!inet2_addr_match(&s->local, &a->addr, a->addr.bitlen))
1671 return 1;
1672 } while ((a = a->next) != NULL);
1673 return 0;
1674 }
1675 return 1;
1676 }
1677 case SSF_D_GE:
1678 {
1679 struct aafilter *a = (void *)f->pred;
1680
1681 return s->rport >= a->port;
1682 }
1683 case SSF_D_LE:
1684 {
1685 struct aafilter *a = (void *)f->pred;
1686
1687 return s->rport <= a->port;
1688 }
1689 case SSF_S_GE:
1690 {
1691 struct aafilter *a = (void *)f->pred;
1692
1693 return s->lport >= a->port;
1694 }
1695 case SSF_S_LE:
1696 {
1697 struct aafilter *a = (void *)f->pred;
1698
1699 return s->lport <= a->port;
1700 }
1701 case SSF_DEVCOND:
1702 {
1703 struct aafilter *a = (void *)f->pred;
1704
1705 return s->iface == a->iface;
1706 }
1707 case SSF_MARKMASK:
1708 {
1709 struct aafilter *a = (void *)f->pred;
1710
1711 return (s->mark & a->mask) == a->mark;
1712 }
1713 /* Yup. It is recursion. Sorry. */
1714 case SSF_AND:
1715 return run_ssfilter(f->pred, s) && run_ssfilter(f->post, s);
1716 case SSF_OR:
1717 return run_ssfilter(f->pred, s) || run_ssfilter(f->post, s);
1718 case SSF_NOT:
1719 return !run_ssfilter(f->pred, s);
1720 default:
1721 abort();
1722 }
1723 }
1724
1725 /* Relocate external jumps by reloc. */
1726 static void ssfilter_patch(char *a, int len, int reloc)
1727 {
1728 while (len > 0) {
1729 struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)a;
1730
1731 if (op->no == len+4)
1732 op->no += reloc;
1733 len -= op->yes;
1734 a += op->yes;
1735 }
1736 if (len < 0)
1737 abort();
1738 }
1739
1740 static int ssfilter_bytecompile(struct ssfilter *f, char **bytecode)
1741 {
1742 switch (f->type) {
1743 case SSF_S_AUTO:
1744 {
1745 if (!(*bytecode = malloc(4))) abort();
1746 ((struct inet_diag_bc_op *)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_AUTO, 4, 8 };
1747 return 4;
1748 }
1749 case SSF_DCOND:
1750 case SSF_SCOND:
1751 {
1752 struct aafilter *a = (void *)f->pred;
1753 struct aafilter *b;
1754 char *ptr;
1755 int code = (f->type == SSF_DCOND ? INET_DIAG_BC_D_COND : INET_DIAG_BC_S_COND);
1756 int len = 0;
1757
1758 for (b = a; b; b = b->next) {
1759 len += 4 + sizeof(struct inet_diag_hostcond);
1760 if (a->addr.family == AF_INET6)
1761 len += 16;
1762 else
1763 len += 4;
1764 if (b->next)
1765 len += 4;
1766 }
1767 if (!(ptr = malloc(len))) abort();
1768 *bytecode = ptr;
1769 for (b = a; b; b = b->next) {
1770 struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)ptr;
1771 int alen = (a->addr.family == AF_INET6 ? 16 : 4);
1772 int oplen = alen + 4 + sizeof(struct inet_diag_hostcond);
1773 struct inet_diag_hostcond *cond = (struct inet_diag_hostcond *)(ptr+4);
1774
1775 *op = (struct inet_diag_bc_op){ code, oplen, oplen+4 };
1776 cond->family = a->addr.family;
1777 cond->port = a->port;
1778 cond->prefix_len = a->addr.bitlen;
1779 memcpy(cond->addr, a->addr.data, alen);
1780 ptr += oplen;
1781 if (b->next) {
1782 op = (struct inet_diag_bc_op *)ptr;
1783 *op = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, len - (ptr-*bytecode)};
1784 ptr += 4;
1785 }
1786 }
1787 return ptr - *bytecode;
1788 }
1789 case SSF_D_GE:
1790 {
1791 struct aafilter *x = (void *)f->pred;
1792
1793 if (!(*bytecode = malloc(8))) abort();
1794 ((struct inet_diag_bc_op *)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_D_GE, 8, 12 };
1795 ((struct inet_diag_bc_op *)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
1796 return 8;
1797 }
1798 case SSF_D_LE:
1799 {
1800 struct aafilter *x = (void *)f->pred;
1801
1802 if (!(*bytecode = malloc(8))) abort();
1803 ((struct inet_diag_bc_op *)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_D_LE, 8, 12 };
1804 ((struct inet_diag_bc_op *)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
1805 return 8;
1806 }
1807 case SSF_S_GE:
1808 {
1809 struct aafilter *x = (void *)f->pred;
1810
1811 if (!(*bytecode = malloc(8))) abort();
1812 ((struct inet_diag_bc_op *)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_S_GE, 8, 12 };
1813 ((struct inet_diag_bc_op *)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
1814 return 8;
1815 }
1816 case SSF_S_LE:
1817 {
1818 struct aafilter *x = (void *)f->pred;
1819
1820 if (!(*bytecode = malloc(8))) abort();
1821 ((struct inet_diag_bc_op *)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_S_LE, 8, 12 };
1822 ((struct inet_diag_bc_op *)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
1823 return 8;
1824 }
1825
1826 case SSF_AND:
1827 {
1828 char *a1 = NULL, *a2 = NULL, *a;
1829 int l1, l2;
1830
1831 l1 = ssfilter_bytecompile(f->pred, &a1);
1832 l2 = ssfilter_bytecompile(f->post, &a2);
1833 if (!l1 || !l2) {
1834 free(a1);
1835 free(a2);
1836 return 0;
1837 }
1838 if (!(a = malloc(l1+l2))) abort();
1839 memcpy(a, a1, l1);
1840 memcpy(a+l1, a2, l2);
1841 free(a1); free(a2);
1842 ssfilter_patch(a, l1, l2);
1843 *bytecode = a;
1844 return l1+l2;
1845 }
1846 case SSF_OR:
1847 {
1848 char *a1 = NULL, *a2 = NULL, *a;
1849 int l1, l2;
1850
1851 l1 = ssfilter_bytecompile(f->pred, &a1);
1852 l2 = ssfilter_bytecompile(f->post, &a2);
1853 if (!l1 || !l2) {
1854 free(a1);
1855 free(a2);
1856 return 0;
1857 }
1858 if (!(a = malloc(l1+l2+4))) abort();
1859 memcpy(a, a1, l1);
1860 memcpy(a+l1+4, a2, l2);
1861 free(a1); free(a2);
1862 *(struct inet_diag_bc_op *)(a+l1) = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, l2+4 };
1863 *bytecode = a;
1864 return l1+l2+4;
1865 }
1866 case SSF_NOT:
1867 {
1868 char *a1 = NULL, *a;
1869 int l1;
1870
1871 l1 = ssfilter_bytecompile(f->pred, &a1);
1872 if (!l1) {
1873 free(a1);
1874 return 0;
1875 }
1876 if (!(a = malloc(l1+4))) abort();
1877 memcpy(a, a1, l1);
1878 free(a1);
1879 *(struct inet_diag_bc_op *)(a+l1) = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, 8 };
1880 *bytecode = a;
1881 return l1+4;
1882 }
1883 case SSF_DEVCOND:
1884 {
1885 /* bytecompile for SSF_DEVCOND not supported yet */
1886 return 0;
1887 }
1888 case SSF_MARKMASK:
1889 {
1890 struct aafilter *a = (void *)f->pred;
1891 struct instr {
1892 struct inet_diag_bc_op op;
1893 struct inet_diag_markcond cond;
1894 };
1895 int inslen = sizeof(struct instr);
1896
1897 if (!(*bytecode = malloc(inslen))) abort();
1898 ((struct instr *)*bytecode)[0] = (struct instr) {
1899 { INET_DIAG_BC_MARK_COND, inslen, inslen + 4 },
1900 { a->mark, a->mask},
1901 };
1902
1903 return inslen;
1904 }
1905 default:
1906 abort();
1907 }
1908 }
1909
1910 static int remember_he(struct aafilter *a, struct hostent *he)
1911 {
1912 char **ptr = he->h_addr_list;
1913 int cnt = 0;
1914 int len;
1915
1916 if (he->h_addrtype == AF_INET)
1917 len = 4;
1918 else if (he->h_addrtype == AF_INET6)
1919 len = 16;
1920 else
1921 return 0;
1922
1923 while (*ptr) {
1924 struct aafilter *b = a;
1925
1926 if (a->addr.bitlen) {
1927 if ((b = malloc(sizeof(*b))) == NULL)
1928 return cnt;
1929 *b = *a;
1930 a->next = b;
1931 }
1932 memcpy(b->addr.data, *ptr, len);
1933 b->addr.bytelen = len;
1934 b->addr.bitlen = len*8;
1935 b->addr.family = he->h_addrtype;
1936 ptr++;
1937 cnt++;
1938 }
1939 return cnt;
1940 }
1941
1942 static int get_dns_host(struct aafilter *a, const char *addr, int fam)
1943 {
1944 static int notfirst;
1945 int cnt = 0;
1946 struct hostent *he;
1947
1948 a->addr.bitlen = 0;
1949 if (!notfirst) {
1950 sethostent(1);
1951 notfirst = 1;
1952 }
1953 he = gethostbyname2(addr, fam == AF_UNSPEC ? AF_INET : fam);
1954 if (he)
1955 cnt = remember_he(a, he);
1956 if (fam == AF_UNSPEC) {
1957 he = gethostbyname2(addr, AF_INET6);
1958 if (he)
1959 cnt += remember_he(a, he);
1960 }
1961 return !cnt;
1962 }
1963
1964 static int xll_initted;
1965
1966 static void xll_init(void)
1967 {
1968 struct rtnl_handle rth;
1969
1970 if (rtnl_open(&rth, 0) < 0)
1971 exit(1);
1972
1973 ll_init_map(&rth);
1974 rtnl_close(&rth);
1975 xll_initted = 1;
1976 }
1977
1978 static const char *xll_index_to_name(int index)
1979 {
1980 if (!xll_initted)
1981 xll_init();
1982 return ll_index_to_name(index);
1983 }
1984
1985 static int xll_name_to_index(const char *dev)
1986 {
1987 if (!xll_initted)
1988 xll_init();
1989 return ll_name_to_index(dev);
1990 }
1991
1992 void *parse_devcond(char *name)
1993 {
1994 struct aafilter a = { .iface = 0 };
1995 struct aafilter *res;
1996
1997 a.iface = xll_name_to_index(name);
1998 if (a.iface == 0) {
1999 char *end;
2000 unsigned long n;
2001
2002 n = strtoul(name, &end, 0);
2003 if (!end || end == name || *end || n > UINT_MAX)
2004 return NULL;
2005
2006 a.iface = n;
2007 }
2008
2009 res = malloc(sizeof(*res));
2010 *res = a;
2011
2012 return res;
2013 }
2014
2015 static void vsock_set_inet_prefix(inet_prefix *a, __u32 cid)
2016 {
2017 *a = (inet_prefix){
2018 .bytelen = sizeof(cid),
2019 .family = AF_VSOCK,
2020 };
2021 memcpy(a->data, &cid, sizeof(cid));
2022 }
2023
2024 void *parse_hostcond(char *addr, bool is_port)
2025 {
2026 char *port = NULL;
2027 struct aafilter a = { .port = -1 };
2028 struct aafilter *res;
2029 int fam = preferred_family;
2030 struct filter *f = &current_filter;
2031
2032 if (fam == AF_UNIX || strncmp(addr, "unix:", 5) == 0) {
2033 char *p;
2034
2035 a.addr.family = AF_UNIX;
2036 if (strncmp(addr, "unix:", 5) == 0)
2037 addr += 5;
2038 p = strdup(addr);
2039 a.addr.bitlen = 8*strlen(p);
2040 memcpy(a.addr.data, &p, sizeof(p));
2041 fam = AF_UNIX;
2042 goto out;
2043 }
2044
2045 if (fam == AF_PACKET || strncmp(addr, "link:", 5) == 0) {
2046 a.addr.family = AF_PACKET;
2047 a.addr.bitlen = 0;
2048 if (strncmp(addr, "link:", 5) == 0)
2049 addr += 5;
2050 port = strchr(addr, ':');
2051 if (port) {
2052 *port = 0;
2053 if (port[1] && strcmp(port+1, "*")) {
2054 if (get_integer(&a.port, port+1, 0)) {
2055 if ((a.port = xll_name_to_index(port+1)) <= 0)
2056 return NULL;
2057 }
2058 }
2059 }
2060 if (addr[0] && strcmp(addr, "*")) {
2061 unsigned short tmp;
2062
2063 a.addr.bitlen = 32;
2064 if (ll_proto_a2n(&tmp, addr))
2065 return NULL;
2066 a.addr.data[0] = ntohs(tmp);
2067 }
2068 fam = AF_PACKET;
2069 goto out;
2070 }
2071
2072 if (fam == AF_NETLINK || strncmp(addr, "netlink:", 8) == 0) {
2073 a.addr.family = AF_NETLINK;
2074 a.addr.bitlen = 0;
2075 if (strncmp(addr, "netlink:", 8) == 0)
2076 addr += 8;
2077 port = strchr(addr, ':');
2078 if (port) {
2079 *port = 0;
2080 if (port[1] && strcmp(port+1, "*")) {
2081 if (get_integer(&a.port, port+1, 0)) {
2082 if (strcmp(port+1, "kernel") == 0)
2083 a.port = 0;
2084 else
2085 return NULL;
2086 }
2087 }
2088 }
2089 if (addr[0] && strcmp(addr, "*")) {
2090 a.addr.bitlen = 32;
2091 if (nl_proto_a2n(&a.addr.data[0], addr) == -1)
2092 return NULL;
2093 }
2094 fam = AF_NETLINK;
2095 goto out;
2096 }
2097
2098 if (fam == AF_VSOCK || strncmp(addr, "vsock:", 6) == 0) {
2099 __u32 cid = ~(__u32)0;
2100
2101 a.addr.family = AF_VSOCK;
2102 if (strncmp(addr, "vsock:", 6) == 0)
2103 addr += 6;
2104
2105 if (is_port)
2106 port = addr;
2107 else {
2108 port = strchr(addr, ':');
2109 if (port) {
2110 *port = '\0';
2111 port++;
2112 }
2113 }
2114
2115 if (port && strcmp(port, "*") &&
2116 get_u32((__u32 *)&a.port, port, 0))
2117 return NULL;
2118
2119 if (addr[0] && strcmp(addr, "*")) {
2120 a.addr.bitlen = 32;
2121 if (get_u32(&cid, addr, 0))
2122 return NULL;
2123 }
2124 vsock_set_inet_prefix(&a.addr, cid);
2125 fam = AF_VSOCK;
2126 goto out;
2127 }
2128
2129 if (fam == AF_INET || !strncmp(addr, "inet:", 5)) {
2130 fam = AF_INET;
2131 if (!strncmp(addr, "inet:", 5))
2132 addr += 5;
2133 } else if (fam == AF_INET6 || !strncmp(addr, "inet6:", 6)) {
2134 fam = AF_INET6;
2135 if (!strncmp(addr, "inet6:", 6))
2136 addr += 6;
2137 }
2138
2139 /* URL-like literal [] */
2140 if (addr[0] == '[') {
2141 addr++;
2142 if ((port = strchr(addr, ']')) == NULL)
2143 return NULL;
2144 *port++ = 0;
2145 } else if (addr[0] == '*') {
2146 port = addr+1;
2147 } else {
2148 port = strrchr(strchr(addr, '/') ? : addr, ':');
2149 }
2150
2151 if (is_port)
2152 port = addr;
2153
2154 if (port && *port) {
2155 if (*port == ':')
2156 *port++ = 0;
2157
2158 if (*port && *port != '*') {
2159 if (get_integer(&a.port, port, 0)) {
2160 struct servent *se1 = NULL;
2161 struct servent *se2 = NULL;
2162
2163 if (current_filter.dbs&(1<<UDP_DB))
2164 se1 = getservbyname(port, UDP_PROTO);
2165 if (current_filter.dbs&(1<<TCP_DB))
2166 se2 = getservbyname(port, TCP_PROTO);
2167 if (se1 && se2 && se1->s_port != se2->s_port) {
2168 fprintf(stderr, "Error: ambiguous port \"%s\".\n", port);
2169 return NULL;
2170 }
2171 if (!se1)
2172 se1 = se2;
2173 if (se1) {
2174 a.port = ntohs(se1->s_port);
2175 } else {
2176 struct scache *s;
2177
2178 for (s = rlist; s; s = s->next) {
2179 if ((s->proto == UDP_PROTO &&
2180 (current_filter.dbs&(1<<UDP_DB))) ||
2181 (s->proto == TCP_PROTO &&
2182 (current_filter.dbs&(1<<TCP_DB)))) {
2183 if (s->name && strcmp(s->name, port) == 0) {
2184 if (a.port > 0 && a.port != s->port) {
2185 fprintf(stderr, "Error: ambiguous port \"%s\".\n", port);
2186 return NULL;
2187 }
2188 a.port = s->port;
2189 }
2190 }
2191 }
2192 if (a.port <= 0) {
2193 fprintf(stderr, "Error: \"%s\" does not look like a port.\n", port);
2194 return NULL;
2195 }
2196 }
2197 }
2198 }
2199 }
2200 if (!is_port && *addr && *addr != '*') {
2201 if (get_prefix_1(&a.addr, addr, fam)) {
2202 if (get_dns_host(&a, addr, fam)) {
2203 fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", addr);
2204 return NULL;
2205 }
2206 }
2207 }
2208
2209 out:
2210 if (fam != AF_UNSPEC) {
2211 int states = f->states;
2212 f->families = 0;
2213 filter_af_set(f, fam);
2214 filter_states_set(f, states);
2215 }
2216
2217 res = malloc(sizeof(*res));
2218 if (res)
2219 memcpy(res, &a, sizeof(a));
2220 return res;
2221 }
2222
2223 void *parse_markmask(const char *markmask)
2224 {
2225 struct aafilter a, *res;
2226
2227 if (strchr(markmask, '/')) {
2228 if (sscanf(markmask, "%i/%i", &a.mark, &a.mask) != 2)
2229 return NULL;
2230 } else {
2231 a.mask = 0xffffffff;
2232 if (sscanf(markmask, "%i", &a.mark) != 1)
2233 return NULL;
2234 }
2235
2236 res = malloc(sizeof(*res));
2237 if (res)
2238 memcpy(res, &a, sizeof(a));
2239 return res;
2240 }
2241
2242 static void proc_ctx_print(struct sockstat *s)
2243 {
2244 char *buf;
2245
2246 if (show_proc_ctx || show_sock_ctx) {
2247 if (find_entry(s->ino, &buf,
2248 (show_proc_ctx & show_sock_ctx) ?
2249 PROC_SOCK_CTX : PROC_CTX) > 0) {
2250 out(" users:(%s)", buf);
2251 free(buf);
2252 }
2253 } else if (show_users) {
2254 if (find_entry(s->ino, &buf, USERS) > 0) {
2255 out(" users:(%s)", buf);
2256 free(buf);
2257 }
2258 }
2259 }
2260
2261 static void inet_stats_print(struct sockstat *s, bool v6only)
2262 {
2263 sock_state_print(s);
2264
2265 inet_addr_print(&s->local, s->lport, s->iface, v6only);
2266 inet_addr_print(&s->remote, s->rport, 0, v6only);
2267
2268 proc_ctx_print(s);
2269 }
2270
2271 static int proc_parse_inet_addr(char *loc, char *rem, int family, struct
2272 sockstat * s)
2273 {
2274 s->local.family = s->remote.family = family;
2275 if (family == AF_INET) {
2276 sscanf(loc, "%x:%x", s->local.data, (unsigned *)&s->lport);
2277 sscanf(rem, "%x:%x", s->remote.data, (unsigned *)&s->rport);
2278 s->local.bytelen = s->remote.bytelen = 4;
2279 return 0;
2280 } else {
2281 sscanf(loc, "%08x%08x%08x%08x:%x",
2282 s->local.data,
2283 s->local.data + 1,
2284 s->local.data + 2,
2285 s->local.data + 3,
2286 &s->lport);
2287 sscanf(rem, "%08x%08x%08x%08x:%x",
2288 s->remote.data,
2289 s->remote.data + 1,
2290 s->remote.data + 2,
2291 s->remote.data + 3,
2292 &s->rport);
2293 s->local.bytelen = s->remote.bytelen = 16;
2294 return 0;
2295 }
2296 return -1;
2297 }
2298
2299 static int proc_inet_split_line(char *line, char **loc, char **rem, char **data)
2300 {
2301 char *p;
2302
2303 if ((p = strchr(line, ':')) == NULL)
2304 return -1;
2305
2306 *loc = p+2;
2307 if ((p = strchr(*loc, ':')) == NULL)
2308 return -1;
2309
2310 p[5] = 0;
2311 *rem = p+6;
2312 if ((p = strchr(*rem, ':')) == NULL)
2313 return -1;
2314
2315 p[5] = 0;
2316 *data = p+6;
2317 return 0;
2318 }
2319
2320 static char *sprint_bw(char *buf, double bw)
2321 {
2322 if (bw > 1000000.)
2323 sprintf(buf, "%.1fM", bw / 1000000.);
2324 else if (bw > 1000.)
2325 sprintf(buf, "%.1fK", bw / 1000.);
2326 else
2327 sprintf(buf, "%g", bw);
2328
2329 return buf;
2330 }
2331
2332 static void sctp_stats_print(struct sctp_info *s)
2333 {
2334 if (s->sctpi_tag)
2335 out(" tag:%x", s->sctpi_tag);
2336 if (s->sctpi_state)
2337 out(" state:%s", sctp_sstate_name[s->sctpi_state]);
2338 if (s->sctpi_rwnd)
2339 out(" rwnd:%d", s->sctpi_rwnd);
2340 if (s->sctpi_unackdata)
2341 out(" unackdata:%d", s->sctpi_unackdata);
2342 if (s->sctpi_penddata)
2343 out(" penddata:%d", s->sctpi_penddata);
2344 if (s->sctpi_instrms)
2345 out(" instrms:%d", s->sctpi_instrms);
2346 if (s->sctpi_outstrms)
2347 out(" outstrms:%d", s->sctpi_outstrms);
2348 if (s->sctpi_inqueue)
2349 out(" inqueue:%d", s->sctpi_inqueue);
2350 if (s->sctpi_outqueue)
2351 out(" outqueue:%d", s->sctpi_outqueue);
2352 if (s->sctpi_overall_error)
2353 out(" overerr:%d", s->sctpi_overall_error);
2354 if (s->sctpi_max_burst)
2355 out(" maxburst:%d", s->sctpi_max_burst);
2356 if (s->sctpi_maxseg)
2357 out(" maxseg:%d", s->sctpi_maxseg);
2358 if (s->sctpi_peer_rwnd)
2359 out(" prwnd:%d", s->sctpi_peer_rwnd);
2360 if (s->sctpi_peer_tag)
2361 out(" ptag:%x", s->sctpi_peer_tag);
2362 if (s->sctpi_peer_capable)
2363 out(" pcapable:%d", s->sctpi_peer_capable);
2364 if (s->sctpi_peer_sack)
2365 out(" psack:%d", s->sctpi_peer_sack);
2366 if (s->sctpi_s_autoclose)
2367 out(" autoclose:%d", s->sctpi_s_autoclose);
2368 if (s->sctpi_s_adaptation_ind)
2369 out(" adapind:%d", s->sctpi_s_adaptation_ind);
2370 if (s->sctpi_s_pd_point)
2371 out(" pdpoint:%d", s->sctpi_s_pd_point);
2372 if (s->sctpi_s_nodelay)
2373 out(" nodealy:%d", s->sctpi_s_nodelay);
2374 if (s->sctpi_s_disable_fragments)
2375 out(" nofrag:%d", s->sctpi_s_disable_fragments);
2376 if (s->sctpi_s_v4mapped)
2377 out(" v4mapped:%d", s->sctpi_s_v4mapped);
2378 if (s->sctpi_s_frag_interleave)
2379 out(" fraginl:%d", s->sctpi_s_frag_interleave);
2380 }
2381
2382 static void tcp_stats_print(struct tcpstat *s)
2383 {
2384 char b1[64];
2385
2386 if (s->has_ts_opt)
2387 out(" ts");
2388 if (s->has_sack_opt)
2389 out(" sack");
2390 if (s->has_ecn_opt)
2391 out(" ecn");
2392 if (s->has_ecnseen_opt)
2393 out(" ecnseen");
2394 if (s->has_fastopen_opt)
2395 out(" fastopen");
2396 if (s->cong_alg[0])
2397 out(" %s", s->cong_alg);
2398 if (s->has_wscale_opt)
2399 out(" wscale:%d,%d", s->snd_wscale, s->rcv_wscale);
2400 if (s->rto)
2401 out(" rto:%g", s->rto);
2402 if (s->backoff)
2403 out(" backoff:%u", s->backoff);
2404 if (s->rtt)
2405 out(" rtt:%g/%g", s->rtt, s->rttvar);
2406 if (s->ato)
2407 out(" ato:%g", s->ato);
2408
2409 if (s->qack)
2410 out(" qack:%d", s->qack);
2411 if (s->qack & 1)
2412 out(" bidir");
2413
2414 if (s->mss)
2415 out(" mss:%d", s->mss);
2416 if (s->pmtu)
2417 out(" pmtu:%u", s->pmtu);
2418 if (s->rcv_mss)
2419 out(" rcvmss:%d", s->rcv_mss);
2420 if (s->advmss)
2421 out(" advmss:%d", s->advmss);
2422 if (s->cwnd)
2423 out(" cwnd:%u", s->cwnd);
2424 if (s->ssthresh)
2425 out(" ssthresh:%d", s->ssthresh);
2426
2427 if (s->bytes_acked)
2428 out(" bytes_acked:%llu", s->bytes_acked);
2429 if (s->bytes_received)
2430 out(" bytes_received:%llu", s->bytes_received);
2431 if (s->segs_out)
2432 out(" segs_out:%u", s->segs_out);
2433 if (s->segs_in)
2434 out(" segs_in:%u", s->segs_in);
2435 if (s->data_segs_out)
2436 out(" data_segs_out:%u", s->data_segs_out);
2437 if (s->data_segs_in)
2438 out(" data_segs_in:%u", s->data_segs_in);
2439
2440 if (s->dctcp && s->dctcp->enabled) {
2441 struct dctcpstat *dctcp = s->dctcp;
2442
2443 out(" dctcp:(ce_state:%u,alpha:%u,ab_ecn:%u,ab_tot:%u)",
2444 dctcp->ce_state, dctcp->alpha, dctcp->ab_ecn,
2445 dctcp->ab_tot);
2446 } else if (s->dctcp) {
2447 out(" dctcp:fallback_mode");
2448 }
2449
2450 if (s->bbr_info) {
2451 __u64 bw;
2452
2453 bw = s->bbr_info->bbr_bw_hi;
2454 bw <<= 32;
2455 bw |= s->bbr_info->bbr_bw_lo;
2456
2457 out(" bbr:(bw:%sbps,mrtt:%g",
2458 sprint_bw(b1, bw * 8.0),
2459 (double)s->bbr_info->bbr_min_rtt / 1000.0);
2460 if (s->bbr_info->bbr_pacing_gain)
2461 out(",pacing_gain:%g",
2462 (double)s->bbr_info->bbr_pacing_gain / 256.0);
2463 if (s->bbr_info->bbr_cwnd_gain)
2464 out(",cwnd_gain:%g",
2465 (double)s->bbr_info->bbr_cwnd_gain / 256.0);
2466 out(")");
2467 }
2468
2469 if (s->send_bps)
2470 out(" send %sbps", sprint_bw(b1, s->send_bps));
2471 if (s->lastsnd)
2472 out(" lastsnd:%u", s->lastsnd);
2473 if (s->lastrcv)
2474 out(" lastrcv:%u", s->lastrcv);
2475 if (s->lastack)
2476 out(" lastack:%u", s->lastack);
2477
2478 if (s->pacing_rate) {
2479 out(" pacing_rate %sbps", sprint_bw(b1, s->pacing_rate));
2480 if (s->pacing_rate_max)
2481 out("/%sbps", sprint_bw(b1, s->pacing_rate_max));
2482 }
2483
2484 if (s->delivery_rate)
2485 out(" delivery_rate %sbps", sprint_bw(b1, s->delivery_rate));
2486 if (s->app_limited)
2487 out(" app_limited");
2488
2489 if (s->busy_time) {
2490 out(" busy:%llums", s->busy_time / 1000);
2491 if (s->rwnd_limited)
2492 out(" rwnd_limited:%llums(%.1f%%)",
2493 s->rwnd_limited / 1000,
2494 100.0 * s->rwnd_limited / s->busy_time);
2495 if (s->sndbuf_limited)
2496 out(" sndbuf_limited:%llums(%.1f%%)",
2497 s->sndbuf_limited / 1000,
2498 100.0 * s->sndbuf_limited / s->busy_time);
2499 }
2500
2501 if (s->unacked)
2502 out(" unacked:%u", s->unacked);
2503 if (s->retrans || s->retrans_total)
2504 out(" retrans:%u/%u", s->retrans, s->retrans_total);
2505 if (s->lost)
2506 out(" lost:%u", s->lost);
2507 if (s->sacked && s->ss.state != SS_LISTEN)
2508 out(" sacked:%u", s->sacked);
2509 if (s->fackets)
2510 out(" fackets:%u", s->fackets);
2511 if (s->reordering != 3)
2512 out(" reordering:%d", s->reordering);
2513 if (s->rcv_rtt)
2514 out(" rcv_rtt:%g", s->rcv_rtt);
2515 if (s->rcv_space)
2516 out(" rcv_space:%d", s->rcv_space);
2517 if (s->rcv_ssthresh)
2518 out(" rcv_ssthresh:%u", s->rcv_ssthresh);
2519 if (s->not_sent)
2520 out(" notsent:%u", s->not_sent);
2521 if (s->min_rtt)
2522 out(" minrtt:%g", s->min_rtt);
2523 }
2524
2525 static void tcp_timer_print(struct tcpstat *s)
2526 {
2527 static const char * const tmr_name[] = {
2528 "off",
2529 "on",
2530 "keepalive",
2531 "timewait",
2532 "persist",
2533 "unknown"
2534 };
2535
2536 if (s->timer) {
2537 if (s->timer > 4)
2538 s->timer = 5;
2539 out(" timer:(%s,%s,%d)",
2540 tmr_name[s->timer],
2541 print_ms_timer(s->timeout),
2542 s->retrans);
2543 }
2544 }
2545
2546 static void sctp_timer_print(struct tcpstat *s)
2547 {
2548 if (s->timer)
2549 out(" timer:(T3_RTX,%s,%d)",
2550 print_ms_timer(s->timeout), s->retrans);
2551 }
2552
2553 static int tcp_show_line(char *line, const struct filter *f, int family)
2554 {
2555 int rto = 0, ato = 0;
2556 struct tcpstat s = {};
2557 char *loc, *rem, *data;
2558 char opt[256];
2559 int n;
2560 int hz = get_user_hz();
2561
2562 if (proc_inet_split_line(line, &loc, &rem, &data))
2563 return -1;
2564
2565 int state = (data[1] >= 'A') ? (data[1] - 'A' + 10) : (data[1] - '0');
2566
2567 if (!(f->states & (1 << state)))
2568 return 0;
2569
2570 proc_parse_inet_addr(loc, rem, family, &s.ss);
2571
2572 if (f->f && run_ssfilter(f->f, &s.ss) == 0)
2573 return 0;
2574
2575 opt[0] = 0;
2576 n = sscanf(data, "%x %x:%x %x:%x %x %d %d %u %d %llx %d %d %d %u %d %[^\n]\n",
2577 &s.ss.state, &s.ss.wq, &s.ss.rq,
2578 &s.timer, &s.timeout, &s.retrans, &s.ss.uid, &s.probes,
2579 &s.ss.ino, &s.ss.refcnt, &s.ss.sk, &rto, &ato, &s.qack, &s.cwnd,
2580 &s.ssthresh, opt);
2581
2582 if (n < 17)
2583 opt[0] = 0;
2584
2585 if (n < 12) {
2586 rto = 0;
2587 s.cwnd = 2;
2588 s.ssthresh = -1;
2589 ato = s.qack = 0;
2590 }
2591
2592 s.retrans = s.timer != 1 ? s.probes : s.retrans;
2593 s.timeout = (s.timeout * 1000 + hz - 1) / hz;
2594 s.ato = (double)ato / hz;
2595 s.qack /= 2;
2596 s.rto = (double)rto;
2597 s.ssthresh = s.ssthresh == -1 ? 0 : s.ssthresh;
2598 s.rto = s.rto != 3 * hz ? s.rto / hz : 0;
2599 s.ss.type = IPPROTO_TCP;
2600
2601 inet_stats_print(&s.ss, false);
2602
2603 if (show_options)
2604 tcp_timer_print(&s);
2605
2606 if (show_details) {
2607 sock_details_print(&s.ss);
2608 if (opt[0])
2609 out(" opt:\"%s\"", opt);
2610 }
2611
2612 if (show_tcpinfo)
2613 tcp_stats_print(&s);
2614
2615 return 0;
2616 }
2617
2618 static int generic_record_read(FILE *fp,
2619 int (*worker)(char*, const struct filter *, int),
2620 const struct filter *f, int fam)
2621 {
2622 char line[256];
2623
2624 /* skip header */
2625 if (fgets(line, sizeof(line), fp) == NULL)
2626 goto outerr;
2627
2628 while (fgets(line, sizeof(line), fp) != NULL) {
2629 int n = strlen(line);
2630
2631 if (n == 0 || line[n-1] != '\n') {
2632 errno = -EINVAL;
2633 return -1;
2634 }
2635 line[n-1] = 0;
2636
2637 if (worker(line, f, fam) < 0)
2638 return 0;
2639 }
2640 outerr:
2641
2642 return ferror(fp) ? -1 : 0;
2643 }
2644
2645 static void print_skmeminfo(struct rtattr *tb[], int attrtype)
2646 {
2647 const __u32 *skmeminfo;
2648
2649 if (!tb[attrtype]) {
2650 if (attrtype == INET_DIAG_SKMEMINFO) {
2651 if (!tb[INET_DIAG_MEMINFO])
2652 return;
2653
2654 const struct inet_diag_meminfo *minfo =
2655 RTA_DATA(tb[INET_DIAG_MEMINFO]);
2656
2657 out(" mem:(r%u,w%u,f%u,t%u)",
2658 minfo->idiag_rmem,
2659 minfo->idiag_wmem,
2660 minfo->idiag_fmem,
2661 minfo->idiag_tmem);
2662 }
2663 return;
2664 }
2665
2666 skmeminfo = RTA_DATA(tb[attrtype]);
2667
2668 out(" skmem:(r%u,rb%u,t%u,tb%u,f%u,w%u,o%u",
2669 skmeminfo[SK_MEMINFO_RMEM_ALLOC],
2670 skmeminfo[SK_MEMINFO_RCVBUF],
2671 skmeminfo[SK_MEMINFO_WMEM_ALLOC],
2672 skmeminfo[SK_MEMINFO_SNDBUF],
2673 skmeminfo[SK_MEMINFO_FWD_ALLOC],
2674 skmeminfo[SK_MEMINFO_WMEM_QUEUED],
2675 skmeminfo[SK_MEMINFO_OPTMEM]);
2676
2677 if (RTA_PAYLOAD(tb[attrtype]) >=
2678 (SK_MEMINFO_BACKLOG + 1) * sizeof(__u32))
2679 out(",bl%u", skmeminfo[SK_MEMINFO_BACKLOG]);
2680
2681 if (RTA_PAYLOAD(tb[attrtype]) >=
2682 (SK_MEMINFO_DROPS + 1) * sizeof(__u32))
2683 out(",d%u", skmeminfo[SK_MEMINFO_DROPS]);
2684
2685 out(")");
2686 }
2687
2688 static void print_md5sig(struct tcp_diag_md5sig *sig)
2689 {
2690 out("%s/%d=",
2691 format_host(sig->tcpm_family,
2692 sig->tcpm_family == AF_INET6 ? 16 : 4,
2693 &sig->tcpm_addr),
2694 sig->tcpm_prefixlen);
2695 print_escape_buf(sig->tcpm_key, sig->tcpm_keylen, " ,");
2696 }
2697
2698 #define TCPI_HAS_OPT(info, opt) !!(info->tcpi_options & (opt))
2699
2700 static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
2701 struct rtattr *tb[])
2702 {
2703 double rtt = 0;
2704 struct tcpstat s = {};
2705
2706 s.ss.state = r->idiag_state;
2707
2708 print_skmeminfo(tb, INET_DIAG_SKMEMINFO);
2709
2710 if (tb[INET_DIAG_INFO]) {
2711 struct tcp_info *info;
2712 int len = RTA_PAYLOAD(tb[INET_DIAG_INFO]);
2713
2714 /* workaround for older kernels with less fields */
2715 if (len < sizeof(*info)) {
2716 info = alloca(sizeof(*info));
2717 memcpy(info, RTA_DATA(tb[INET_DIAG_INFO]), len);
2718 memset((char *)info + len, 0, sizeof(*info) - len);
2719 } else
2720 info = RTA_DATA(tb[INET_DIAG_INFO]);
2721
2722 if (show_options) {
2723 s.has_ts_opt = TCPI_HAS_OPT(info, TCPI_OPT_TIMESTAMPS);
2724 s.has_sack_opt = TCPI_HAS_OPT(info, TCPI_OPT_SACK);
2725 s.has_ecn_opt = TCPI_HAS_OPT(info, TCPI_OPT_ECN);
2726 s.has_ecnseen_opt = TCPI_HAS_OPT(info, TCPI_OPT_ECN_SEEN);
2727 s.has_fastopen_opt = TCPI_HAS_OPT(info, TCPI_OPT_SYN_DATA);
2728 }
2729
2730 if (tb[INET_DIAG_CONG])
2731 strncpy(s.cong_alg,
2732 rta_getattr_str(tb[INET_DIAG_CONG]),
2733 sizeof(s.cong_alg) - 1);
2734
2735 if (TCPI_HAS_OPT(info, TCPI_OPT_WSCALE)) {
2736 s.has_wscale_opt = true;
2737 s.snd_wscale = info->tcpi_snd_wscale;
2738 s.rcv_wscale = info->tcpi_rcv_wscale;
2739 }
2740
2741 if (info->tcpi_rto && info->tcpi_rto != 3000000)
2742 s.rto = (double)info->tcpi_rto / 1000;
2743
2744 s.backoff = info->tcpi_backoff;
2745 s.rtt = (double)info->tcpi_rtt / 1000;
2746 s.rttvar = (double)info->tcpi_rttvar / 1000;
2747 s.ato = (double)info->tcpi_ato / 1000;
2748 s.mss = info->tcpi_snd_mss;
2749 s.rcv_mss = info->tcpi_rcv_mss;
2750 s.advmss = info->tcpi_advmss;
2751 s.rcv_space = info->tcpi_rcv_space;
2752 s.rcv_rtt = (double)info->tcpi_rcv_rtt / 1000;
2753 s.lastsnd = info->tcpi_last_data_sent;
2754 s.lastrcv = info->tcpi_last_data_recv;
2755 s.lastack = info->tcpi_last_ack_recv;
2756 s.unacked = info->tcpi_unacked;
2757 s.retrans = info->tcpi_retrans;
2758 s.retrans_total = info->tcpi_total_retrans;
2759 s.lost = info->tcpi_lost;
2760 s.sacked = info->tcpi_sacked;
2761 s.fackets = info->tcpi_fackets;
2762 s.reordering = info->tcpi_reordering;
2763 s.rcv_ssthresh = info->tcpi_rcv_ssthresh;
2764 s.cwnd = info->tcpi_snd_cwnd;
2765 s.pmtu = info->tcpi_pmtu;
2766
2767 if (info->tcpi_snd_ssthresh < 0xFFFF)
2768 s.ssthresh = info->tcpi_snd_ssthresh;
2769
2770 rtt = (double) info->tcpi_rtt;
2771 if (tb[INET_DIAG_VEGASINFO]) {
2772 const struct tcpvegas_info *vinfo
2773 = RTA_DATA(tb[INET_DIAG_VEGASINFO]);
2774
2775 if (vinfo->tcpv_enabled &&
2776 vinfo->tcpv_rtt && vinfo->tcpv_rtt != 0x7fffffff)
2777 rtt = vinfo->tcpv_rtt;
2778 }
2779
2780 if (tb[INET_DIAG_DCTCPINFO]) {
2781 struct dctcpstat *dctcp = malloc(sizeof(struct
2782 dctcpstat));
2783
2784 const struct tcp_dctcp_info *dinfo
2785 = RTA_DATA(tb[INET_DIAG_DCTCPINFO]);
2786
2787 dctcp->enabled = !!dinfo->dctcp_enabled;
2788 dctcp->ce_state = dinfo->dctcp_ce_state;
2789 dctcp->alpha = dinfo->dctcp_alpha;
2790 dctcp->ab_ecn = dinfo->dctcp_ab_ecn;
2791 dctcp->ab_tot = dinfo->dctcp_ab_tot;
2792 s.dctcp = dctcp;
2793 }
2794
2795 if (tb[INET_DIAG_BBRINFO]) {
2796 const void *bbr_info = RTA_DATA(tb[INET_DIAG_BBRINFO]);
2797 int len = min(RTA_PAYLOAD(tb[INET_DIAG_BBRINFO]),
2798 sizeof(*s.bbr_info));
2799
2800 s.bbr_info = calloc(1, sizeof(*s.bbr_info));
2801 if (s.bbr_info && bbr_info)
2802 memcpy(s.bbr_info, bbr_info, len);
2803 }
2804
2805 if (rtt > 0 && info->tcpi_snd_mss && info->tcpi_snd_cwnd) {
2806 s.send_bps = (double) info->tcpi_snd_cwnd *
2807 (double)info->tcpi_snd_mss * 8000000. / rtt;
2808 }
2809
2810 if (info->tcpi_pacing_rate &&
2811 info->tcpi_pacing_rate != ~0ULL) {
2812 s.pacing_rate = info->tcpi_pacing_rate * 8.;
2813
2814 if (info->tcpi_max_pacing_rate &&
2815 info->tcpi_max_pacing_rate != ~0ULL)
2816 s.pacing_rate_max = info->tcpi_max_pacing_rate * 8.;
2817 }
2818 s.bytes_acked = info->tcpi_bytes_acked;
2819 s.bytes_received = info->tcpi_bytes_received;
2820 s.segs_out = info->tcpi_segs_out;
2821 s.segs_in = info->tcpi_segs_in;
2822 s.data_segs_out = info->tcpi_data_segs_out;
2823 s.data_segs_in = info->tcpi_data_segs_in;
2824 s.not_sent = info->tcpi_notsent_bytes;
2825 if (info->tcpi_min_rtt && info->tcpi_min_rtt != ~0U)
2826 s.min_rtt = (double) info->tcpi_min_rtt / 1000;
2827 s.delivery_rate = info->tcpi_delivery_rate * 8.;
2828 s.app_limited = info->tcpi_delivery_rate_app_limited;
2829 s.busy_time = info->tcpi_busy_time;
2830 s.rwnd_limited = info->tcpi_rwnd_limited;
2831 s.sndbuf_limited = info->tcpi_sndbuf_limited;
2832 tcp_stats_print(&s);
2833 free(s.dctcp);
2834 free(s.bbr_info);
2835 }
2836 if (tb[INET_DIAG_MD5SIG]) {
2837 struct tcp_diag_md5sig *sig = RTA_DATA(tb[INET_DIAG_MD5SIG]);
2838 int len = RTA_PAYLOAD(tb[INET_DIAG_MD5SIG]);
2839
2840 out(" md5keys:");
2841 print_md5sig(sig++);
2842 for (len -= sizeof(*sig); len > 0; len -= sizeof(*sig)) {
2843 out(",");
2844 print_md5sig(sig++);
2845 }
2846 }
2847 }
2848
2849 static const char *format_host_sa(struct sockaddr_storage *sa)
2850 {
2851 union {
2852 struct sockaddr_in sin;
2853 struct sockaddr_in6 sin6;
2854 } *saddr = (void *)sa;
2855
2856 switch (sa->ss_family) {
2857 case AF_INET:
2858 return format_host(AF_INET, 4, &saddr->sin.sin_addr);
2859 case AF_INET6:
2860 return format_host(AF_INET6, 16, &saddr->sin6.sin6_addr);
2861 default:
2862 return "";
2863 }
2864 }
2865
2866 static void sctp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
2867 struct rtattr *tb[])
2868 {
2869 struct sockaddr_storage *sa;
2870 int len;
2871
2872 print_skmeminfo(tb, INET_DIAG_SKMEMINFO);
2873
2874 if (tb[INET_DIAG_LOCALS]) {
2875 len = RTA_PAYLOAD(tb[INET_DIAG_LOCALS]);
2876 sa = RTA_DATA(tb[INET_DIAG_LOCALS]);
2877
2878 out("locals:%s", format_host_sa(sa));
2879 for (sa++, len -= sizeof(*sa); len > 0; sa++, len -= sizeof(*sa))
2880 out(",%s", format_host_sa(sa));
2881
2882 }
2883 if (tb[INET_DIAG_PEERS]) {
2884 len = RTA_PAYLOAD(tb[INET_DIAG_PEERS]);
2885 sa = RTA_DATA(tb[INET_DIAG_PEERS]);
2886
2887 out(" peers:%s", format_host_sa(sa));
2888 for (sa++, len -= sizeof(*sa); len > 0; sa++, len -= sizeof(*sa))
2889 out(",%s", format_host_sa(sa));
2890 }
2891 if (tb[INET_DIAG_INFO]) {
2892 struct sctp_info *info;
2893 len = RTA_PAYLOAD(tb[INET_DIAG_INFO]);
2894
2895 /* workaround for older kernels with less fields */
2896 if (len < sizeof(*info)) {
2897 info = alloca(sizeof(*info));
2898 memcpy(info, RTA_DATA(tb[INET_DIAG_INFO]), len);
2899 memset((char *)info + len, 0, sizeof(*info) - len);
2900 } else
2901 info = RTA_DATA(tb[INET_DIAG_INFO]);
2902
2903 sctp_stats_print(info);
2904 }
2905 }
2906
2907 static void parse_diag_msg(struct nlmsghdr *nlh, struct sockstat *s)
2908 {
2909 struct rtattr *tb[INET_DIAG_MAX+1];
2910 struct inet_diag_msg *r = NLMSG_DATA(nlh);
2911
2912 parse_rtattr(tb, INET_DIAG_MAX, (struct rtattr *)(r+1),
2913 nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
2914
2915 s->state = r->idiag_state;
2916 s->local.family = s->remote.family = r->idiag_family;
2917 s->lport = ntohs(r->id.idiag_sport);
2918 s->rport = ntohs(r->id.idiag_dport);
2919 s->wq = r->idiag_wqueue;
2920 s->rq = r->idiag_rqueue;
2921 s->ino = r->idiag_inode;
2922 s->uid = r->idiag_uid;
2923 s->iface = r->id.idiag_if;
2924 s->sk = cookie_sk_get(&r->id.idiag_cookie[0]);
2925
2926 s->mark = 0;
2927 if (tb[INET_DIAG_MARK])
2928 s->mark = rta_getattr_u32(tb[INET_DIAG_MARK]);
2929 if (tb[INET_DIAG_PROTOCOL])
2930 s->raw_prot = rta_getattr_u8(tb[INET_DIAG_PROTOCOL]);
2931 else
2932 s->raw_prot = 0;
2933
2934 if (s->local.family == AF_INET)
2935 s->local.bytelen = s->remote.bytelen = 4;
2936 else
2937 s->local.bytelen = s->remote.bytelen = 16;
2938
2939 memcpy(s->local.data, r->id.idiag_src, s->local.bytelen);
2940 memcpy(s->remote.data, r->id.idiag_dst, s->local.bytelen);
2941 }
2942
2943 static int inet_show_sock(struct nlmsghdr *nlh,
2944 struct sockstat *s)
2945 {
2946 struct rtattr *tb[INET_DIAG_MAX+1];
2947 struct inet_diag_msg *r = NLMSG_DATA(nlh);
2948 unsigned char v6only = 0;
2949
2950 parse_rtattr(tb, INET_DIAG_MAX, (struct rtattr *)(r+1),
2951 nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
2952
2953 if (tb[INET_DIAG_PROTOCOL])
2954 s->type = rta_getattr_u8(tb[INET_DIAG_PROTOCOL]);
2955
2956 if (s->local.family == AF_INET6 && tb[INET_DIAG_SKV6ONLY])
2957 v6only = rta_getattr_u8(tb[INET_DIAG_SKV6ONLY]);
2958
2959 inet_stats_print(s, v6only);
2960
2961 if (show_options) {
2962 struct tcpstat t = {};
2963
2964 t.timer = r->idiag_timer;
2965 t.timeout = r->idiag_expires;
2966 t.retrans = r->idiag_retrans;
2967 if (s->type == IPPROTO_SCTP)
2968 sctp_timer_print(&t);
2969 else
2970 tcp_timer_print(&t);
2971 }
2972
2973 if (show_details) {
2974 sock_details_print(s);
2975 if (s->local.family == AF_INET6 && tb[INET_DIAG_SKV6ONLY])
2976 out(" v6only:%u", v6only);
2977
2978 if (tb[INET_DIAG_SHUTDOWN]) {
2979 unsigned char mask;
2980
2981 mask = rta_getattr_u8(tb[INET_DIAG_SHUTDOWN]);
2982 out(" %c-%c",
2983 mask & 1 ? '-' : '<', mask & 2 ? '-' : '>');
2984 }
2985 }
2986
2987 if (show_mem || (show_tcpinfo && s->type != IPPROTO_UDP)) {
2988 out("\n\t");
2989 if (s->type == IPPROTO_SCTP)
2990 sctp_show_info(nlh, r, tb);
2991 else
2992 tcp_show_info(nlh, r, tb);
2993 }
2994 sctp_ino = s->ino;
2995
2996 return 0;
2997 }
2998
2999 static int tcpdiag_send(int fd, int protocol, struct filter *f)
3000 {
3001 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
3002 struct {
3003 struct nlmsghdr nlh;
3004 struct inet_diag_req r;
3005 } req = {
3006 .nlh.nlmsg_len = sizeof(req),
3007 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST,
3008 .nlh.nlmsg_seq = MAGIC_SEQ,
3009 .r.idiag_family = AF_INET,
3010 .r.idiag_states = f->states,
3011 };
3012 char *bc = NULL;
3013 int bclen;
3014 struct msghdr msg;
3015 struct rtattr rta;
3016 struct iovec iov[3];
3017 int iovlen = 1;
3018
3019 if (protocol == IPPROTO_UDP)
3020 return -1;
3021
3022 if (protocol == IPPROTO_TCP)
3023 req.nlh.nlmsg_type = TCPDIAG_GETSOCK;
3024 else
3025 req.nlh.nlmsg_type = DCCPDIAG_GETSOCK;
3026 if (show_mem) {
3027 req.r.idiag_ext |= (1<<(INET_DIAG_MEMINFO-1));
3028 req.r.idiag_ext |= (1<<(INET_DIAG_SKMEMINFO-1));
3029 }
3030
3031 if (show_tcpinfo) {
3032 req.r.idiag_ext |= (1<<(INET_DIAG_INFO-1));
3033 req.r.idiag_ext |= (1<<(INET_DIAG_VEGASINFO-1));
3034 req.r.idiag_ext |= (1<<(INET_DIAG_CONG-1));
3035 }
3036
3037 iov[0] = (struct iovec){
3038 .iov_base = &req,
3039 .iov_len = sizeof(req)
3040 };
3041 if (f->f) {
3042 bclen = ssfilter_bytecompile(f->f, &bc);
3043 if (bclen) {
3044 rta.rta_type = INET_DIAG_REQ_BYTECODE;
3045 rta.rta_len = RTA_LENGTH(bclen);
3046 iov[1] = (struct iovec){ &rta, sizeof(rta) };
3047 iov[2] = (struct iovec){ bc, bclen };
3048 req.nlh.nlmsg_len += RTA_LENGTH(bclen);
3049 iovlen = 3;
3050 }
3051 }
3052
3053 msg = (struct msghdr) {
3054 .msg_name = (void *)&nladdr,
3055 .msg_namelen = sizeof(nladdr),
3056 .msg_iov = iov,
3057 .msg_iovlen = iovlen,
3058 };
3059
3060 if (sendmsg(fd, &msg, 0) < 0) {
3061 close(fd);
3062 return -1;
3063 }
3064
3065 return 0;
3066 }
3067
3068 static int sockdiag_send(int family, int fd, int protocol, struct filter *f)
3069 {
3070 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
3071 DIAG_REQUEST(req, struct inet_diag_req_v2 r);
3072 char *bc = NULL;
3073 int bclen;
3074 struct msghdr msg;
3075 struct rtattr rta;
3076 struct iovec iov[3];
3077 int iovlen = 1;
3078
3079 if (family == PF_UNSPEC)
3080 return tcpdiag_send(fd, protocol, f);
3081
3082 memset(&req.r, 0, sizeof(req.r));
3083 req.r.sdiag_family = family;
3084 req.r.sdiag_protocol = protocol;
3085 req.r.idiag_states = f->states;
3086 if (show_mem) {
3087 req.r.idiag_ext |= (1<<(INET_DIAG_MEMINFO-1));
3088 req.r.idiag_ext |= (1<<(INET_DIAG_SKMEMINFO-1));
3089 }
3090
3091 if (show_tcpinfo) {
3092 req.r.idiag_ext |= (1<<(INET_DIAG_INFO-1));
3093 req.r.idiag_ext |= (1<<(INET_DIAG_VEGASINFO-1));
3094 req.r.idiag_ext |= (1<<(INET_DIAG_CONG-1));
3095 }
3096
3097 iov[0] = (struct iovec){
3098 .iov_base = &req,
3099 .iov_len = sizeof(req)
3100 };
3101 if (f->f) {
3102 bclen = ssfilter_bytecompile(f->f, &bc);
3103 if (bclen) {
3104 rta.rta_type = INET_DIAG_REQ_BYTECODE;
3105 rta.rta_len = RTA_LENGTH(bclen);
3106 iov[1] = (struct iovec){ &rta, sizeof(rta) };
3107 iov[2] = (struct iovec){ bc, bclen };
3108 req.nlh.nlmsg_len += RTA_LENGTH(bclen);
3109 iovlen = 3;
3110 }
3111 }
3112
3113 msg = (struct msghdr) {
3114 .msg_name = (void *)&nladdr,
3115 .msg_namelen = sizeof(nladdr),
3116 .msg_iov = iov,
3117 .msg_iovlen = iovlen,
3118 };
3119
3120 if (sendmsg(fd, &msg, 0) < 0) {
3121 close(fd);
3122 return -1;
3123 }
3124
3125 return 0;
3126 }
3127
3128 struct inet_diag_arg {
3129 struct filter *f;
3130 int protocol;
3131 struct rtnl_handle *rth;
3132 };
3133
3134 static int kill_inet_sock(struct nlmsghdr *h, void *arg, struct sockstat *s)
3135 {
3136 struct inet_diag_msg *d = NLMSG_DATA(h);
3137 struct inet_diag_arg *diag_arg = arg;
3138 struct rtnl_handle *rth = diag_arg->rth;
3139
3140 DIAG_REQUEST(req, struct inet_diag_req_v2 r);
3141
3142 req.nlh.nlmsg_type = SOCK_DESTROY;
3143 req.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
3144 req.nlh.nlmsg_seq = ++rth->seq;
3145 req.r.sdiag_family = d->idiag_family;
3146 req.r.sdiag_protocol = diag_arg->protocol;
3147 req.r.id = d->id;
3148
3149 if (diag_arg->protocol == IPPROTO_RAW) {
3150 struct inet_diag_req_raw *raw = (void *)&req.r;
3151
3152 BUILD_BUG_ON(sizeof(req.r) != sizeof(*raw));
3153 raw->sdiag_raw_protocol = s->raw_prot;
3154 }
3155
3156 return rtnl_talk(rth, &req.nlh, NULL);
3157 }
3158
3159 static int show_one_inet_sock(const struct sockaddr_nl *addr,
3160 struct nlmsghdr *h, void *arg)
3161 {
3162 int err;
3163 struct inet_diag_arg *diag_arg = arg;
3164 struct inet_diag_msg *r = NLMSG_DATA(h);
3165 struct sockstat s = {};
3166
3167 if (!(diag_arg->f->families & FAMILY_MASK(r->idiag_family)))
3168 return 0;
3169
3170 parse_diag_msg(h, &s);
3171 s.type = diag_arg->protocol;
3172
3173 if (diag_arg->f->f && run_ssfilter(diag_arg->f->f, &s) == 0)
3174 return 0;
3175
3176 if (diag_arg->f->kill && kill_inet_sock(h, arg, &s) != 0) {
3177 if (errno == EOPNOTSUPP || errno == ENOENT) {
3178 /* Socket can't be closed, or is already closed. */
3179 return 0;
3180 } else {
3181 perror("SOCK_DESTROY answers");
3182 return -1;
3183 }
3184 }
3185
3186 err = inet_show_sock(h, &s);
3187 if (err < 0)
3188 return err;
3189
3190 return 0;
3191 }
3192
3193 static int inet_show_netlink(struct filter *f, FILE *dump_fp, int protocol)
3194 {
3195 int err = 0;
3196 struct rtnl_handle rth, rth2;
3197 int family = PF_INET;
3198 struct inet_diag_arg arg = { .f = f, .protocol = protocol };
3199
3200 if (rtnl_open_byproto(&rth, 0, NETLINK_SOCK_DIAG))
3201 return -1;
3202
3203 if (f->kill) {
3204 if (rtnl_open_byproto(&rth2, 0, NETLINK_SOCK_DIAG)) {
3205 rtnl_close(&rth);
3206 return -1;
3207 }
3208 arg.rth = &rth2;
3209 }
3210
3211 rth.dump = MAGIC_SEQ;
3212 rth.dump_fp = dump_fp;
3213 if (preferred_family == PF_INET6)
3214 family = PF_INET6;
3215
3216 again:
3217 if ((err = sockdiag_send(family, rth.fd, protocol, f)))
3218 goto Exit;
3219
3220 if ((err = rtnl_dump_filter(&rth, show_one_inet_sock, &arg))) {
3221 if (family != PF_UNSPEC) {
3222 family = PF_UNSPEC;
3223 goto again;
3224 }
3225 goto Exit;
3226 }
3227 if (family == PF_INET && preferred_family != PF_INET) {
3228 family = PF_INET6;
3229 goto again;
3230 }
3231
3232 Exit:
3233 rtnl_close(&rth);
3234 if (arg.rth)
3235 rtnl_close(arg.rth);
3236 return err;
3237 }
3238
3239 static int tcp_show_netlink_file(struct filter *f)
3240 {
3241 FILE *fp;
3242 char buf[16384];
3243 int err = -1;
3244
3245 if ((fp = fopen(getenv("TCPDIAG_FILE"), "r")) == NULL) {
3246 perror("fopen($TCPDIAG_FILE)");
3247 return err;
3248 }
3249
3250 while (1) {
3251 int status, err2;
3252 struct nlmsghdr *h = (struct nlmsghdr *)buf;
3253 struct sockstat s = {};
3254
3255 status = fread(buf, 1, sizeof(*h), fp);
3256 if (status < 0) {
3257 perror("Reading header from $TCPDIAG_FILE");
3258 break;
3259 }
3260 if (status != sizeof(*h)) {
3261 perror("Unexpected EOF reading $TCPDIAG_FILE");
3262 break;
3263 }
3264
3265 status = fread(h+1, 1, NLMSG_ALIGN(h->nlmsg_len-sizeof(*h)), fp);
3266
3267 if (status < 0) {
3268 perror("Reading $TCPDIAG_FILE");
3269 break;
3270 }
3271 if (status + sizeof(*h) < h->nlmsg_len) {
3272 perror("Unexpected EOF reading $TCPDIAG_FILE");
3273 break;
3274 }
3275
3276 /* The only legal exit point */
3277 if (h->nlmsg_type == NLMSG_DONE) {
3278 err = 0;
3279 break;
3280 }
3281
3282 if (h->nlmsg_type == NLMSG_ERROR) {
3283 struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(h);
3284
3285 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
3286 fprintf(stderr, "ERROR truncated\n");
3287 } else {
3288 errno = -err->error;
3289 perror("TCPDIAG answered");
3290 }
3291 break;
3292 }
3293
3294 parse_diag_msg(h, &s);
3295 s.type = IPPROTO_TCP;
3296
3297 if (f && f->f && run_ssfilter(f->f, &s) == 0)
3298 continue;
3299
3300 err2 = inet_show_sock(h, &s);
3301 if (err2 < 0) {
3302 err = err2;
3303 break;
3304 }
3305 }
3306
3307 fclose(fp);
3308 return err;
3309 }
3310
3311 static int tcp_show(struct filter *f)
3312 {
3313 FILE *fp = NULL;
3314 char *buf = NULL;
3315 int bufsize = 1024*1024;
3316
3317 if (!filter_af_get(f, AF_INET) && !filter_af_get(f, AF_INET6))
3318 return 0;
3319
3320 dg_proto = TCP_PROTO;
3321
3322 if (getenv("TCPDIAG_FILE"))
3323 return tcp_show_netlink_file(f);
3324
3325 if (!getenv("PROC_NET_TCP") && !getenv("PROC_ROOT")
3326 && inet_show_netlink(f, NULL, IPPROTO_TCP) == 0)
3327 return 0;
3328
3329 /* Sigh... We have to parse /proc/net/tcp... */
3330 while (bufsize >= 64*1024) {
3331 if ((buf = malloc(bufsize)) != NULL)
3332 break;
3333 bufsize /= 2;
3334 }
3335 if (buf == NULL) {
3336 errno = ENOMEM;
3337 return -1;
3338 }
3339
3340 if (f->families & FAMILY_MASK(AF_INET)) {
3341 if ((fp = net_tcp_open()) == NULL)
3342 goto outerr;
3343
3344 setbuffer(fp, buf, bufsize);
3345 if (generic_record_read(fp, tcp_show_line, f, AF_INET))
3346 goto outerr;
3347 fclose(fp);
3348 }
3349
3350 if ((f->families & FAMILY_MASK(AF_INET6)) &&
3351 (fp = net_tcp6_open()) != NULL) {
3352 setbuffer(fp, buf, bufsize);
3353 if (generic_record_read(fp, tcp_show_line, f, AF_INET6))
3354 goto outerr;
3355 fclose(fp);
3356 }
3357
3358 free(buf);
3359 return 0;
3360
3361 outerr:
3362 do {
3363 int saved_errno = errno;
3364
3365 free(buf);
3366 if (fp)
3367 fclose(fp);
3368 errno = saved_errno;
3369 return -1;
3370 } while (0);
3371 }
3372
3373 static int dccp_show(struct filter *f)
3374 {
3375 if (!filter_af_get(f, AF_INET) && !filter_af_get(f, AF_INET6))
3376 return 0;
3377
3378 if (!getenv("PROC_NET_DCCP") && !getenv("PROC_ROOT")
3379 && inet_show_netlink(f, NULL, IPPROTO_DCCP) == 0)
3380 return 0;
3381
3382 return 0;
3383 }
3384
3385 static int sctp_show(struct filter *f)
3386 {
3387 if (!filter_af_get(f, AF_INET) && !filter_af_get(f, AF_INET6))
3388 return 0;
3389
3390 if (!getenv("PROC_NET_SCTP") && !getenv("PROC_ROOT")
3391 && inet_show_netlink(f, NULL, IPPROTO_SCTP) == 0)
3392 return 0;
3393
3394 return 0;
3395 }
3396
3397 static int dgram_show_line(char *line, const struct filter *f, int family)
3398 {
3399 struct sockstat s = {};
3400 char *loc, *rem, *data;
3401 char opt[256];
3402 int n;
3403
3404 if (proc_inet_split_line(line, &loc, &rem, &data))
3405 return -1;
3406
3407 int state = (data[1] >= 'A') ? (data[1] - 'A' + 10) : (data[1] - '0');
3408
3409 if (!(f->states & (1 << state)))
3410 return 0;
3411
3412 proc_parse_inet_addr(loc, rem, family, &s);
3413
3414 if (f->f && run_ssfilter(f->f, &s) == 0)
3415 return 0;
3416
3417 opt[0] = 0;
3418 n = sscanf(data, "%x %x:%x %*x:%*x %*x %d %*d %u %d %llx %[^\n]\n",
3419 &s.state, &s.wq, &s.rq,
3420 &s.uid, &s.ino,
3421 &s.refcnt, &s.sk, opt);
3422
3423 if (n < 9)
3424 opt[0] = 0;
3425
3426 s.type = dg_proto == UDP_PROTO ? IPPROTO_UDP : 0;
3427 inet_stats_print(&s, false);
3428
3429 if (show_details && opt[0])
3430 out(" opt:\"%s\"", opt);
3431
3432 return 0;
3433 }
3434
3435 static int udp_show(struct filter *f)
3436 {
3437 FILE *fp = NULL;
3438
3439 if (!filter_af_get(f, AF_INET) && !filter_af_get(f, AF_INET6))
3440 return 0;
3441
3442 dg_proto = UDP_PROTO;
3443
3444 if (!getenv("PROC_NET_UDP") && !getenv("PROC_ROOT")
3445 && inet_show_netlink(f, NULL, IPPROTO_UDP) == 0)
3446 return 0;
3447
3448 if (f->families&FAMILY_MASK(AF_INET)) {
3449 if ((fp = net_udp_open()) == NULL)
3450 goto outerr;
3451 if (generic_record_read(fp, dgram_show_line, f, AF_INET))
3452 goto outerr;
3453 fclose(fp);
3454 }
3455
3456 if ((f->families&FAMILY_MASK(AF_INET6)) &&
3457 (fp = net_udp6_open()) != NULL) {
3458 if (generic_record_read(fp, dgram_show_line, f, AF_INET6))
3459 goto outerr;
3460 fclose(fp);
3461 }
3462 return 0;
3463
3464 outerr:
3465 do {
3466 int saved_errno = errno;
3467
3468 if (fp)
3469 fclose(fp);
3470 errno = saved_errno;
3471 return -1;
3472 } while (0);
3473 }
3474
3475 static int raw_show(struct filter *f)
3476 {
3477 FILE *fp = NULL;
3478
3479 if (!filter_af_get(f, AF_INET) && !filter_af_get(f, AF_INET6))
3480 return 0;
3481
3482 dg_proto = RAW_PROTO;
3483
3484 if (!getenv("PROC_NET_RAW") && !getenv("PROC_ROOT") &&
3485 inet_show_netlink(f, NULL, IPPROTO_RAW) == 0)
3486 return 0;
3487
3488 if (f->families&FAMILY_MASK(AF_INET)) {
3489 if ((fp = net_raw_open()) == NULL)
3490 goto outerr;
3491 if (generic_record_read(fp, dgram_show_line, f, AF_INET))
3492 goto outerr;
3493 fclose(fp);
3494 }
3495
3496 if ((f->families&FAMILY_MASK(AF_INET6)) &&
3497 (fp = net_raw6_open()) != NULL) {
3498 if (generic_record_read(fp, dgram_show_line, f, AF_INET6))
3499 goto outerr;
3500 fclose(fp);
3501 }
3502 return 0;
3503
3504 outerr:
3505 do {
3506 int saved_errno = errno;
3507
3508 if (fp)
3509 fclose(fp);
3510 errno = saved_errno;
3511 return -1;
3512 } while (0);
3513 }
3514
3515 #define MAX_UNIX_REMEMBER (1024*1024/sizeof(struct sockstat))
3516
3517 static void unix_list_drop_first(struct sockstat **list)
3518 {
3519 struct sockstat *s = *list;
3520
3521 (*list) = (*list)->next;
3522 free(s->name);
3523 free(s);
3524 }
3525
3526 static bool unix_type_skip(struct sockstat *s, struct filter *f)
3527 {
3528 if (s->type == SOCK_STREAM && !(f->dbs&(1<<UNIX_ST_DB)))
3529 return true;
3530 if (s->type == SOCK_DGRAM && !(f->dbs&(1<<UNIX_DG_DB)))
3531 return true;
3532 if (s->type == SOCK_SEQPACKET && !(f->dbs&(1<<UNIX_SQ_DB)))
3533 return true;
3534 return false;
3535 }
3536
3537 static void unix_stats_print(struct sockstat *s, struct filter *f)
3538 {
3539 char port_name[30] = {};
3540
3541 sock_state_print(s);
3542
3543 sock_addr_print(s->name ?: "*", " ",
3544 int_to_str(s->lport, port_name), NULL);
3545 sock_addr_print(s->peer_name ?: "*", " ",
3546 int_to_str(s->rport, port_name), NULL);
3547
3548 proc_ctx_print(s);
3549 }
3550
3551 static int unix_show_sock(const struct sockaddr_nl *addr, struct nlmsghdr *nlh,
3552 void *arg)
3553 {
3554 struct filter *f = (struct filter *)arg;
3555 struct unix_diag_msg *r = NLMSG_DATA(nlh);
3556 struct rtattr *tb[UNIX_DIAG_MAX+1];
3557 char name[128];
3558 struct sockstat stat = { .name = "*", .peer_name = "*" };
3559
3560 parse_rtattr(tb, UNIX_DIAG_MAX, (struct rtattr *)(r+1),
3561 nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
3562
3563 stat.type = r->udiag_type;
3564 stat.state = r->udiag_state;
3565 stat.ino = stat.lport = r->udiag_ino;
3566 stat.local.family = stat.remote.family = AF_UNIX;
3567
3568 if (unix_type_skip(&stat, f))
3569 return 0;
3570
3571 if (tb[UNIX_DIAG_RQLEN]) {
3572 struct unix_diag_rqlen *rql = RTA_DATA(tb[UNIX_DIAG_RQLEN]);
3573
3574 stat.rq = rql->udiag_rqueue;
3575 stat.wq = rql->udiag_wqueue;
3576 }
3577 if (tb[UNIX_DIAG_NAME]) {
3578 int len = RTA_PAYLOAD(tb[UNIX_DIAG_NAME]);
3579
3580 memcpy(name, RTA_DATA(tb[UNIX_DIAG_NAME]), len);
3581 name[len] = '\0';
3582 if (name[0] == '\0') {
3583 int i;
3584 for (i = 0; i < len; i++)
3585 if (name[i] == '\0')
3586 name[i] = '@';
3587 }
3588 stat.name = &name[0];
3589 memcpy(stat.local.data, &stat.name, sizeof(stat.name));
3590 }
3591 if (tb[UNIX_DIAG_PEER])
3592 stat.rport = rta_getattr_u32(tb[UNIX_DIAG_PEER]);
3593
3594 if (f->f && run_ssfilter(f->f, &stat) == 0)
3595 return 0;
3596
3597 unix_stats_print(&stat, f);
3598
3599 if (show_mem)
3600 print_skmeminfo(tb, UNIX_DIAG_MEMINFO);
3601 if (show_details) {
3602 if (tb[UNIX_DIAG_SHUTDOWN]) {
3603 unsigned char mask;
3604
3605 mask = rta_getattr_u8(tb[UNIX_DIAG_SHUTDOWN]);
3606 out(" %c-%c",
3607 mask & 1 ? '-' : '<', mask & 2 ? '-' : '>');
3608 }
3609 if (tb[UNIX_DIAG_VFS]) {
3610 struct unix_diag_vfs *uv = RTA_DATA(tb[UNIX_DIAG_VFS]);
3611
3612 out(" ino:%u dev:%u/%u", uv->udiag_vfs_ino, major(uv->udiag_vfs_dev),
3613 minor(uv->udiag_vfs_dev));
3614 }
3615 if (tb[UNIX_DIAG_ICONS]) {
3616 int len = RTA_PAYLOAD(tb[UNIX_DIAG_ICONS]);
3617 __u32 *peers = RTA_DATA(tb[UNIX_DIAG_ICONS]);
3618 int i;
3619
3620 out(" peers:");
3621 for (i = 0; i < len / sizeof(__u32); i++)
3622 out(" %u", peers[i]);
3623 }
3624 }
3625
3626 return 0;
3627 }
3628
3629 static int handle_netlink_request(struct filter *f, struct nlmsghdr *req,
3630 size_t size, rtnl_filter_t show_one_sock)
3631 {
3632 int ret = -1;
3633 struct rtnl_handle rth;
3634
3635 if (rtnl_open_byproto(&rth, 0, NETLINK_SOCK_DIAG))
3636 return -1;
3637
3638 rth.dump = MAGIC_SEQ;
3639
3640 if (rtnl_send(&rth, req, size) < 0)
3641 goto Exit;
3642
3643 if (rtnl_dump_filter(&rth, show_one_sock, f))
3644 goto Exit;
3645
3646 ret = 0;
3647 Exit:
3648 rtnl_close(&rth);
3649 return ret;
3650 }
3651
3652 static int unix_show_netlink(struct filter *f)
3653 {
3654 DIAG_REQUEST(req, struct unix_diag_req r);
3655
3656 req.r.sdiag_family = AF_UNIX;
3657 req.r.udiag_states = f->states;
3658 req.r.udiag_show = UDIAG_SHOW_NAME | UDIAG_SHOW_PEER | UDIAG_SHOW_RQLEN;
3659 if (show_mem)
3660 req.r.udiag_show |= UDIAG_SHOW_MEMINFO;
3661 if (show_details)
3662 req.r.udiag_show |= UDIAG_SHOW_VFS | UDIAG_SHOW_ICONS;
3663
3664 return handle_netlink_request(f, &req.nlh, sizeof(req), unix_show_sock);
3665 }
3666
3667 static int unix_show(struct filter *f)
3668 {
3669 FILE *fp;
3670 char buf[256];
3671 char name[128];
3672 int newformat = 0;
3673 int cnt;
3674 struct sockstat *list = NULL;
3675 const int unix_state_map[] = { SS_CLOSE, SS_SYN_SENT,
3676 SS_ESTABLISHED, SS_CLOSING };
3677
3678 if (!filter_af_get(f, AF_UNIX))
3679 return 0;
3680
3681 if (!getenv("PROC_NET_UNIX") && !getenv("PROC_ROOT")
3682 && unix_show_netlink(f) == 0)
3683 return 0;
3684
3685 if ((fp = net_unix_open()) == NULL)
3686 return -1;
3687 if (!fgets(buf, sizeof(buf), fp)) {
3688 fclose(fp);
3689 return -1;
3690 }
3691
3692 if (memcmp(buf, "Peer", 4) == 0)
3693 newformat = 1;
3694 cnt = 0;
3695
3696 while (fgets(buf, sizeof(buf), fp)) {
3697 struct sockstat *u, **insp;
3698 int flags;
3699
3700 if (!(u = calloc(1, sizeof(*u))))
3701 break;
3702
3703 if (sscanf(buf, "%x: %x %x %x %x %x %d %s",
3704 &u->rport, &u->rq, &u->wq, &flags, &u->type,
3705 &u->state, &u->ino, name) < 8)
3706 name[0] = 0;
3707
3708 u->lport = u->ino;
3709 u->local.family = u->remote.family = AF_UNIX;
3710
3711 if (flags & (1 << 16)) {
3712 u->state = SS_LISTEN;
3713 } else if (u->state > 0 &&
3714 u->state <= ARRAY_SIZE(unix_state_map)) {
3715 u->state = unix_state_map[u->state-1];
3716 if (u->type == SOCK_DGRAM && u->state == SS_CLOSE && u->rport)
3717 u->state = SS_ESTABLISHED;
3718 }
3719 if (unix_type_skip(u, f) ||
3720 !(f->states & (1 << u->state))) {
3721 free(u);
3722 continue;
3723 }
3724
3725 if (!newformat) {
3726 u->rport = 0;
3727 u->rq = 0;
3728 u->wq = 0;
3729 }
3730
3731 if (name[0]) {
3732 u->name = strdup(name);
3733 if (!u->name) {
3734 free(u);
3735 break;
3736 }
3737 }
3738
3739 if (u->rport) {
3740 struct sockstat *p;
3741
3742 for (p = list; p; p = p->next) {
3743 if (u->rport == p->lport)
3744 break;
3745 }
3746 if (!p)
3747 u->peer_name = "?";
3748 else
3749 u->peer_name = p->name ? : "*";
3750 }
3751
3752 if (f->f) {
3753 struct sockstat st = {
3754 .local.family = AF_UNIX,
3755 .remote.family = AF_UNIX,
3756 };
3757
3758 memcpy(st.local.data, &u->name, sizeof(u->name));
3759 /* when parsing the old format rport is set to 0 and
3760 * therefore peer_name remains NULL
3761 */
3762 if (u->peer_name && strcmp(u->peer_name, "*"))
3763 memcpy(st.remote.data, &u->peer_name,
3764 sizeof(u->peer_name));
3765 if (run_ssfilter(f->f, &st) == 0) {
3766 free(u->name);
3767 free(u);
3768 continue;
3769 }
3770 }
3771
3772 insp = &list;
3773 while (*insp) {
3774 if (u->type < (*insp)->type ||
3775 (u->type == (*insp)->type &&
3776 u->ino < (*insp)->ino))
3777 break;
3778 insp = &(*insp)->next;
3779 }
3780 u->next = *insp;
3781 *insp = u;
3782
3783 if (++cnt > MAX_UNIX_REMEMBER) {
3784 while (list) {
3785 unix_stats_print(list, f);
3786 unix_list_drop_first(&list);
3787 }
3788 cnt = 0;
3789 }
3790 }
3791 fclose(fp);
3792 while (list) {
3793 unix_stats_print(list, f);
3794 unix_list_drop_first(&list);
3795 }
3796
3797 return 0;
3798 }
3799
3800 static int packet_stats_print(struct sockstat *s, const struct filter *f)
3801 {
3802 const char *addr, *port;
3803 char ll_name[16];
3804
3805 s->local.family = s->remote.family = AF_PACKET;
3806
3807 if (f->f) {
3808 s->local.data[0] = s->prot;
3809 if (run_ssfilter(f->f, s) == 0)
3810 return 1;
3811 }
3812
3813 sock_state_print(s);
3814
3815 if (s->prot == 3)
3816 addr = "*";
3817 else
3818 addr = ll_proto_n2a(htons(s->prot), ll_name, sizeof(ll_name));
3819
3820 if (s->iface == 0)
3821 port = "*";
3822 else
3823 port = xll_index_to_name(s->iface);
3824
3825 sock_addr_print(addr, ":", port, NULL);
3826 sock_addr_print("", "*", "", NULL);
3827
3828 proc_ctx_print(s);
3829
3830 if (show_details)
3831 sock_details_print(s);
3832
3833 return 0;
3834 }
3835
3836 static void packet_show_ring(struct packet_diag_ring *ring)
3837 {
3838 out("blk_size:%d", ring->pdr_block_size);
3839 out(",blk_nr:%d", ring->pdr_block_nr);
3840 out(",frm_size:%d", ring->pdr_frame_size);
3841 out(",frm_nr:%d", ring->pdr_frame_nr);
3842 out(",tmo:%d", ring->pdr_retire_tmo);
3843 out(",features:0x%x", ring->pdr_features);
3844 }
3845
3846 static int packet_show_sock(const struct sockaddr_nl *addr,
3847 struct nlmsghdr *nlh, void *arg)
3848 {
3849 const struct filter *f = arg;
3850 struct packet_diag_msg *r = NLMSG_DATA(nlh);
3851 struct packet_diag_info *pinfo = NULL;
3852 struct packet_diag_ring *ring_rx = NULL, *ring_tx = NULL;
3853 struct rtattr *tb[PACKET_DIAG_MAX+1];
3854 struct sockstat stat = {};
3855 uint32_t fanout = 0;
3856 bool has_fanout = false;
3857
3858 parse_rtattr(tb, PACKET_DIAG_MAX, (struct rtattr *)(r+1),
3859 nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
3860
3861 /* use /proc/net/packet if all info are not available */
3862 if (!tb[PACKET_DIAG_MEMINFO])
3863 return -1;
3864
3865 stat.type = r->pdiag_type;
3866 stat.prot = r->pdiag_num;
3867 stat.ino = r->pdiag_ino;
3868 stat.state = SS_CLOSE;
3869 stat.sk = cookie_sk_get(&r->pdiag_cookie[0]);
3870
3871 if (tb[PACKET_DIAG_MEMINFO]) {
3872 __u32 *skmeminfo = RTA_DATA(tb[PACKET_DIAG_MEMINFO]);
3873
3874 stat.rq = skmeminfo[SK_MEMINFO_RMEM_ALLOC];
3875 }
3876
3877 if (tb[PACKET_DIAG_INFO]) {
3878 pinfo = RTA_DATA(tb[PACKET_DIAG_INFO]);
3879 stat.lport = stat.iface = pinfo->pdi_index;
3880 }
3881
3882 if (tb[PACKET_DIAG_UID])
3883 stat.uid = rta_getattr_u32(tb[PACKET_DIAG_UID]);
3884
3885 if (tb[PACKET_DIAG_RX_RING])
3886 ring_rx = RTA_DATA(tb[PACKET_DIAG_RX_RING]);
3887
3888 if (tb[PACKET_DIAG_TX_RING])
3889 ring_tx = RTA_DATA(tb[PACKET_DIAG_TX_RING]);
3890
3891 if (tb[PACKET_DIAG_FANOUT]) {
3892 has_fanout = true;
3893 fanout = rta_getattr_u32(tb[PACKET_DIAG_FANOUT]);
3894 }
3895
3896 if (packet_stats_print(&stat, f))
3897 return 0;
3898
3899 if (show_details) {
3900 if (pinfo) {
3901 out("\n\tver:%d", pinfo->pdi_version);
3902 out(" cpy_thresh:%d", pinfo->pdi_copy_thresh);
3903 out(" flags( ");
3904 if (pinfo->pdi_flags & PDI_RUNNING)
3905 out("running");
3906 if (pinfo->pdi_flags & PDI_AUXDATA)
3907 out(" auxdata");
3908 if (pinfo->pdi_flags & PDI_ORIGDEV)
3909 out(" origdev");
3910 if (pinfo->pdi_flags & PDI_VNETHDR)
3911 out(" vnethdr");
3912 if (pinfo->pdi_flags & PDI_LOSS)
3913 out(" loss");
3914 if (!pinfo->pdi_flags)
3915 out("0");
3916 out(" )");
3917 }
3918 if (ring_rx) {
3919 out("\n\tring_rx(");
3920 packet_show_ring(ring_rx);
3921 out(")");
3922 }
3923 if (ring_tx) {
3924 out("\n\tring_tx(");
3925 packet_show_ring(ring_tx);
3926 out(")");
3927 }
3928 if (has_fanout) {
3929 uint16_t type = (fanout >> 16) & 0xffff;
3930
3931 out("\n\tfanout(");
3932 out("id:%d,", fanout & 0xffff);
3933 out("type:");
3934
3935 if (type == 0)
3936 out("hash");
3937 else if (type == 1)
3938 out("lb");
3939 else if (type == 2)
3940 out("cpu");
3941 else if (type == 3)
3942 out("roll");
3943 else if (type == 4)
3944 out("random");
3945 else if (type == 5)
3946 out("qm");
3947 else
3948 out("0x%x", type);
3949
3950 out(")");
3951 }
3952 }
3953
3954 if (show_bpf && tb[PACKET_DIAG_FILTER]) {
3955 struct sock_filter *fil =
3956 RTA_DATA(tb[PACKET_DIAG_FILTER]);
3957 int num = RTA_PAYLOAD(tb[PACKET_DIAG_FILTER]) /
3958 sizeof(struct sock_filter);
3959
3960 out("\n\tbpf filter (%d): ", num);
3961 while (num) {
3962 out(" 0x%02x %u %u %u,",
3963 fil->code, fil->jt, fil->jf, fil->k);
3964 num--;
3965 fil++;
3966 }
3967 }
3968
3969 if (show_mem)
3970 print_skmeminfo(tb, PACKET_DIAG_MEMINFO);
3971 return 0;
3972 }
3973
3974 static int packet_show_netlink(struct filter *f)
3975 {
3976 DIAG_REQUEST(req, struct packet_diag_req r);
3977
3978 req.r.sdiag_family = AF_PACKET;
3979 req.r.pdiag_show = PACKET_SHOW_INFO | PACKET_SHOW_MEMINFO |
3980 PACKET_SHOW_FILTER | PACKET_SHOW_RING_CFG | PACKET_SHOW_FANOUT;
3981
3982 return handle_netlink_request(f, &req.nlh, sizeof(req), packet_show_sock);
3983 }
3984
3985 static int packet_show_line(char *buf, const struct filter *f, int fam)
3986 {
3987 unsigned long long sk;
3988 struct sockstat stat = {};
3989 int type, prot, iface, state, rq, uid, ino;
3990
3991 sscanf(buf, "%llx %*d %d %x %d %d %u %u %u",
3992 &sk,
3993 &type, &prot, &iface, &state,
3994 &rq, &uid, &ino);
3995
3996 if (stat.type == SOCK_RAW && !(f->dbs&(1<<PACKET_R_DB)))
3997 return 0;
3998 if (stat.type == SOCK_DGRAM && !(f->dbs&(1<<PACKET_DG_DB)))
3999 return 0;
4000
4001 stat.type = type;
4002 stat.prot = prot;
4003 stat.lport = stat.iface = iface;
4004 stat.state = state;
4005 stat.rq = rq;
4006 stat.uid = uid;
4007 stat.ino = ino;
4008 stat.state = SS_CLOSE;
4009
4010 if (packet_stats_print(&stat, f))
4011 return 0;
4012
4013 return 0;
4014 }
4015
4016 static int packet_show(struct filter *f)
4017 {
4018 FILE *fp;
4019 int rc = 0;
4020
4021 if (!filter_af_get(f, AF_PACKET) || !(f->states & (1 << SS_CLOSE)))
4022 return 0;
4023
4024 if (!getenv("PROC_NET_PACKET") && !getenv("PROC_ROOT") &&
4025 packet_show_netlink(f) == 0)
4026 return 0;
4027
4028 if ((fp = net_packet_open()) == NULL)
4029 return -1;
4030 if (generic_record_read(fp, packet_show_line, f, AF_PACKET))
4031 rc = -1;
4032
4033 fclose(fp);
4034 return rc;
4035 }
4036
4037 static int netlink_show_one(struct filter *f,
4038 int prot, int pid, unsigned int groups,
4039 int state, int dst_pid, unsigned int dst_group,
4040 int rq, int wq,
4041 unsigned long long sk, unsigned long long cb)
4042 {
4043 struct sockstat st = {
4044 .state = SS_CLOSE,
4045 .rq = rq,
4046 .wq = wq,
4047 .local.family = AF_NETLINK,
4048 .remote.family = AF_NETLINK,
4049 };
4050
4051 SPRINT_BUF(prot_buf) = {};
4052 const char *prot_name;
4053 char procname[64] = {};
4054
4055 if (f->f) {
4056 st.rport = -1;
4057 st.lport = pid;
4058 st.local.data[0] = prot;
4059 if (run_ssfilter(f->f, &st) == 0)
4060 return 1;
4061 }
4062
4063 sock_state_print(&st);
4064
4065 if (resolve_services)
4066 prot_name = nl_proto_n2a(prot, prot_buf, sizeof(prot_buf));
4067 else
4068 prot_name = int_to_str(prot, prot_buf);
4069
4070 if (pid == -1) {
4071 procname[0] = '*';
4072 } else if (resolve_services) {
4073 int done = 0;
4074
4075 if (!pid) {
4076 done = 1;
4077 strncpy(procname, "kernel", 7);
4078 } else if (pid > 0) {
4079 FILE *fp;
4080
4081 snprintf(procname, sizeof(procname), "%s/%d/stat",
4082 getenv("PROC_ROOT") ? : "/proc", pid);
4083 if ((fp = fopen(procname, "r")) != NULL) {
4084 if (fscanf(fp, "%*d (%[^)])", procname) == 1) {
4085 snprintf(procname+strlen(procname),
4086 sizeof(procname)-strlen(procname),
4087 "/%d", pid);
4088 done = 1;
4089 }
4090 fclose(fp);
4091 }
4092 }
4093 if (!done)
4094 int_to_str(pid, procname);
4095 } else {
4096 int_to_str(pid, procname);
4097 }
4098
4099 sock_addr_print(prot_name, ":", procname, NULL);
4100
4101 if (state == NETLINK_CONNECTED) {
4102 char dst_group_buf[30];
4103 char dst_pid_buf[30];
4104
4105 sock_addr_print(int_to_str(dst_group, dst_group_buf), ":",
4106 int_to_str(dst_pid, dst_pid_buf), NULL);
4107 } else {
4108 sock_addr_print("", "*", "", NULL);
4109 }
4110
4111 char *pid_context = NULL;
4112
4113 if (show_proc_ctx) {
4114 /* The pid value will either be:
4115 * 0 if destination kernel - show kernel initial context.
4116 * A valid process pid - use getpidcon.
4117 * A unique value allocated by the kernel or netlink user
4118 * to the process - show context as "not available".
4119 */
4120 if (!pid)
4121 security_get_initial_context("kernel", &pid_context);
4122 else if (pid > 0)
4123 getpidcon(pid, &pid_context);
4124
4125 out(" proc_ctx=%s", pid_context ? : "unavailable");
4126 free(pid_context);
4127 }
4128
4129 if (show_details) {
4130 out(" sk=%llx cb=%llx groups=0x%08x", sk, cb, groups);
4131 }
4132
4133 return 0;
4134 }
4135
4136 static int netlink_show_sock(const struct sockaddr_nl *addr,
4137 struct nlmsghdr *nlh, void *arg)
4138 {
4139 struct filter *f = (struct filter *)arg;
4140 struct netlink_diag_msg *r = NLMSG_DATA(nlh);
4141 struct rtattr *tb[NETLINK_DIAG_MAX+1];
4142 int rq = 0, wq = 0;
4143 unsigned long groups = 0;
4144
4145 parse_rtattr(tb, NETLINK_DIAG_MAX, (struct rtattr *)(r+1),
4146 nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
4147
4148 if (tb[NETLINK_DIAG_GROUPS] && RTA_PAYLOAD(tb[NETLINK_DIAG_GROUPS]))
4149 groups = *(unsigned long *) RTA_DATA(tb[NETLINK_DIAG_GROUPS]);
4150
4151 if (tb[NETLINK_DIAG_MEMINFO]) {
4152 const __u32 *skmeminfo;
4153
4154 skmeminfo = RTA_DATA(tb[NETLINK_DIAG_MEMINFO]);
4155
4156 rq = skmeminfo[SK_MEMINFO_RMEM_ALLOC];
4157 wq = skmeminfo[SK_MEMINFO_WMEM_ALLOC];
4158 }
4159
4160 if (netlink_show_one(f, r->ndiag_protocol, r->ndiag_portid, groups,
4161 r->ndiag_state, r->ndiag_dst_portid, r->ndiag_dst_group,
4162 rq, wq, 0, 0)) {
4163 return 0;
4164 }
4165
4166 if (show_mem) {
4167 out("\t");
4168 print_skmeminfo(tb, NETLINK_DIAG_MEMINFO);
4169 }
4170
4171 return 0;
4172 }
4173
4174 static int netlink_show_netlink(struct filter *f)
4175 {
4176 DIAG_REQUEST(req, struct netlink_diag_req r);
4177
4178 req.r.sdiag_family = AF_NETLINK;
4179 req.r.sdiag_protocol = NDIAG_PROTO_ALL;
4180 req.r.ndiag_show = NDIAG_SHOW_GROUPS | NDIAG_SHOW_MEMINFO;
4181
4182 return handle_netlink_request(f, &req.nlh, sizeof(req), netlink_show_sock);
4183 }
4184
4185 static int netlink_show(struct filter *f)
4186 {
4187 FILE *fp;
4188 char buf[256];
4189 int prot, pid;
4190 unsigned int groups;
4191 int rq, wq, rc;
4192 unsigned long long sk, cb;
4193
4194 if (!filter_af_get(f, AF_NETLINK) || !(f->states & (1 << SS_CLOSE)))
4195 return 0;
4196
4197 if (!getenv("PROC_NET_NETLINK") && !getenv("PROC_ROOT") &&
4198 netlink_show_netlink(f) == 0)
4199 return 0;
4200
4201 if ((fp = net_netlink_open()) == NULL)
4202 return -1;
4203 if (!fgets(buf, sizeof(buf), fp)) {
4204 fclose(fp);
4205 return -1;
4206 }
4207
4208 while (fgets(buf, sizeof(buf), fp)) {
4209 sscanf(buf, "%llx %d %d %x %d %d %llx %d",
4210 &sk,
4211 &prot, &pid, &groups, &rq, &wq, &cb, &rc);
4212
4213 netlink_show_one(f, prot, pid, groups, 0, 0, 0, rq, wq, sk, cb);
4214 }
4215
4216 fclose(fp);
4217 return 0;
4218 }
4219
4220 static bool vsock_type_skip(struct sockstat *s, struct filter *f)
4221 {
4222 if (s->type == SOCK_STREAM && !(f->dbs & (1 << VSOCK_ST_DB)))
4223 return true;
4224 if (s->type == SOCK_DGRAM && !(f->dbs & (1 << VSOCK_DG_DB)))
4225 return true;
4226 return false;
4227 }
4228
4229 static void vsock_addr_print(inet_prefix *a, __u32 port)
4230 {
4231 char cid_str[sizeof("4294967295")];
4232 char port_str[sizeof("4294967295")];
4233 __u32 cid;
4234
4235 memcpy(&cid, a->data, sizeof(cid));
4236
4237 if (cid == ~(__u32)0)
4238 snprintf(cid_str, sizeof(cid_str), "*");
4239 else
4240 snprintf(cid_str, sizeof(cid_str), "%u", cid);
4241
4242 if (port == ~(__u32)0)
4243 snprintf(port_str, sizeof(port_str), "*");
4244 else
4245 snprintf(port_str, sizeof(port_str), "%u", port);
4246
4247 sock_addr_print(cid_str, ":", port_str, NULL);
4248 }
4249
4250 static void vsock_stats_print(struct sockstat *s, struct filter *f)
4251 {
4252 sock_state_print(s);
4253
4254 vsock_addr_print(&s->local, s->lport);
4255 vsock_addr_print(&s->remote, s->rport);
4256
4257 proc_ctx_print(s);
4258 }
4259
4260 static int vsock_show_sock(const struct sockaddr_nl *addr,
4261 struct nlmsghdr *nlh, void *arg)
4262 {
4263 struct filter *f = (struct filter *)arg;
4264 struct vsock_diag_msg *r = NLMSG_DATA(nlh);
4265 struct sockstat stat = {
4266 .type = r->vdiag_type,
4267 .lport = r->vdiag_src_port,
4268 .rport = r->vdiag_dst_port,
4269 .state = r->vdiag_state,
4270 .ino = r->vdiag_ino,
4271 };
4272
4273 vsock_set_inet_prefix(&stat.local, r->vdiag_src_cid);
4274 vsock_set_inet_prefix(&stat.remote, r->vdiag_dst_cid);
4275
4276 if (vsock_type_skip(&stat, f))
4277 return 0;
4278
4279 if (f->f && run_ssfilter(f->f, &stat) == 0)
4280 return 0;
4281
4282 vsock_stats_print(&stat, f);
4283
4284 return 0;
4285 }
4286
4287 static int vsock_show(struct filter *f)
4288 {
4289 DIAG_REQUEST(req, struct vsock_diag_req r);
4290
4291 if (!filter_af_get(f, AF_VSOCK))
4292 return 0;
4293
4294 req.r.sdiag_family = AF_VSOCK;
4295 req.r.vdiag_states = f->states;
4296
4297 return handle_netlink_request(f, &req.nlh, sizeof(req), vsock_show_sock);
4298 }
4299
4300 static void tipc_sock_addr_print(struct rtattr *net_addr, struct rtattr *id)
4301 {
4302 uint32_t node = rta_getattr_u32(net_addr);
4303 uint32_t identity = rta_getattr_u32(id);
4304
4305 SPRINT_BUF(addr) = {};
4306 SPRINT_BUF(port) = {};
4307
4308 sprintf(addr, "%u", node);
4309 sprintf(port, "%u", identity);
4310 sock_addr_print(addr, ":", port, NULL);
4311
4312 }
4313
4314 static int tipc_show_sock(const struct sockaddr_nl *addr, struct nlmsghdr *nlh,
4315 void *arg)
4316 {
4317 struct rtattr *stat[TIPC_NLA_SOCK_STAT_MAX + 1] = {};
4318 struct rtattr *attrs[TIPC_NLA_SOCK_MAX + 1] = {};
4319 struct rtattr *con[TIPC_NLA_CON_MAX + 1] = {};
4320 struct rtattr *info[TIPC_NLA_MAX + 1] = {};
4321 struct rtattr *msg_ref;
4322 struct sockstat ss = {};
4323
4324 parse_rtattr(info, TIPC_NLA_MAX, NLMSG_DATA(nlh),
4325 NLMSG_PAYLOAD(nlh, 0));
4326
4327 if (!info[TIPC_NLA_SOCK])
4328 return 0;
4329
4330 msg_ref = info[TIPC_NLA_SOCK];
4331 parse_rtattr(attrs, TIPC_NLA_SOCK_MAX, RTA_DATA(msg_ref),
4332 RTA_PAYLOAD(msg_ref));
4333
4334 msg_ref = attrs[TIPC_NLA_SOCK_STAT];
4335 parse_rtattr(stat, TIPC_NLA_SOCK_STAT_MAX,
4336 RTA_DATA(msg_ref), RTA_PAYLOAD(msg_ref));
4337
4338
4339 ss.local.family = AF_TIPC;
4340 ss.type = rta_getattr_u32(attrs[TIPC_NLA_SOCK_TYPE]);
4341 ss.state = rta_getattr_u32(attrs[TIPC_NLA_SOCK_TIPC_STATE]);
4342 ss.uid = rta_getattr_u32(attrs[TIPC_NLA_SOCK_UID]);
4343 ss.ino = rta_getattr_u32(attrs[TIPC_NLA_SOCK_INO]);
4344 ss.rq = rta_getattr_u32(stat[TIPC_NLA_SOCK_STAT_RCVQ]);
4345 ss.wq = rta_getattr_u32(stat[TIPC_NLA_SOCK_STAT_SENDQ]);
4346 ss.sk = rta_getattr_u64(attrs[TIPC_NLA_SOCK_COOKIE]);
4347
4348 sock_state_print (&ss);
4349
4350 tipc_sock_addr_print(attrs[TIPC_NLA_SOCK_ADDR],
4351 attrs[TIPC_NLA_SOCK_REF]);
4352
4353 msg_ref = attrs[TIPC_NLA_SOCK_CON];
4354 if (msg_ref) {
4355 parse_rtattr(con, TIPC_NLA_CON_MAX,
4356 RTA_DATA(msg_ref), RTA_PAYLOAD(msg_ref));
4357
4358 tipc_sock_addr_print(con[TIPC_NLA_CON_NODE],
4359 con[TIPC_NLA_CON_SOCK]);
4360 } else
4361 sock_addr_print("", "-", "", NULL);
4362
4363 if (show_details)
4364 sock_details_print(&ss);
4365
4366 proc_ctx_print(&ss);
4367
4368 if (show_tipcinfo) {
4369 out("\n type:%s", stype_nameg[ss.type]);
4370 out(" cong:%s ",
4371 stat[TIPC_NLA_SOCK_STAT_LINK_CONG] ? "link" :
4372 stat[TIPC_NLA_SOCK_STAT_CONN_CONG] ? "conn" : "none");
4373 out(" drop:%d ",
4374 rta_getattr_u32(stat[TIPC_NLA_SOCK_STAT_DROP]));
4375
4376 if (attrs[TIPC_NLA_SOCK_HAS_PUBL])
4377 out(" publ");
4378
4379 if (con[TIPC_NLA_CON_FLAG])
4380 out(" via {%u,%u} ",
4381 rta_getattr_u32(con[TIPC_NLA_CON_TYPE]),
4382 rta_getattr_u32(con[TIPC_NLA_CON_INST]));
4383 }
4384
4385 return 0;
4386 }
4387
4388 static int tipc_show(struct filter *f)
4389 {
4390 DIAG_REQUEST(req, struct tipc_sock_diag_req r);
4391
4392 memset(&req.r, 0, sizeof(req.r));
4393 req.r.sdiag_family = AF_TIPC;
4394 req.r.tidiag_states = f->states;
4395
4396 return handle_netlink_request(f, &req.nlh, sizeof(req), tipc_show_sock);
4397 }
4398
4399 struct sock_diag_msg {
4400 __u8 sdiag_family;
4401 };
4402
4403 static int generic_show_sock(const struct sockaddr_nl *addr,
4404 struct nlmsghdr *nlh, void *arg)
4405 {
4406 struct sock_diag_msg *r = NLMSG_DATA(nlh);
4407 struct inet_diag_arg inet_arg = { .f = arg, .protocol = IPPROTO_MAX };
4408 int ret;
4409
4410 switch (r->sdiag_family) {
4411 case AF_INET:
4412 case AF_INET6:
4413 inet_arg.rth = inet_arg.f->rth_for_killing;
4414 ret = show_one_inet_sock(addr, nlh, &inet_arg);
4415 break;
4416 case AF_UNIX:
4417 ret = unix_show_sock(addr, nlh, arg);
4418 break;
4419 case AF_PACKET:
4420 ret = packet_show_sock(addr, nlh, arg);
4421 break;
4422 case AF_NETLINK:
4423 ret = netlink_show_sock(addr, nlh, arg);
4424 break;
4425 case AF_VSOCK:
4426 ret = vsock_show_sock(addr, nlh, arg);
4427 break;
4428 default:
4429 ret = -1;
4430 }
4431
4432 render();
4433
4434 return ret;
4435 }
4436
4437 static int handle_follow_request(struct filter *f)
4438 {
4439 int ret = 0;
4440 int groups = 0;
4441 struct rtnl_handle rth, rth2;
4442
4443 if (f->families & FAMILY_MASK(AF_INET) && f->dbs & (1 << TCP_DB))
4444 groups |= 1 << (SKNLGRP_INET_TCP_DESTROY - 1);
4445 if (f->families & FAMILY_MASK(AF_INET) && f->dbs & (1 << UDP_DB))
4446 groups |= 1 << (SKNLGRP_INET_UDP_DESTROY - 1);
4447 if (f->families & FAMILY_MASK(AF_INET6) && f->dbs & (1 << TCP_DB))
4448 groups |= 1 << (SKNLGRP_INET6_TCP_DESTROY - 1);
4449 if (f->families & FAMILY_MASK(AF_INET6) && f->dbs & (1 << UDP_DB))
4450 groups |= 1 << (SKNLGRP_INET6_UDP_DESTROY - 1);
4451
4452 if (groups == 0)
4453 return -1;
4454
4455 if (rtnl_open_byproto(&rth, groups, NETLINK_SOCK_DIAG))
4456 return -1;
4457
4458 rth.dump = 0;
4459 rth.local.nl_pid = 0;
4460
4461 if (f->kill) {
4462 if (rtnl_open_byproto(&rth2, groups, NETLINK_SOCK_DIAG)) {
4463 rtnl_close(&rth);
4464 return -1;
4465 }
4466 f->rth_for_killing = &rth2;
4467 }
4468
4469 if (rtnl_dump_filter(&rth, generic_show_sock, f))
4470 ret = -1;
4471
4472 rtnl_close(&rth);
4473 if (f->rth_for_killing)
4474 rtnl_close(f->rth_for_killing);
4475 return ret;
4476 }
4477
4478 static int get_snmp_int(char *proto, char *key, int *result)
4479 {
4480 char buf[1024];
4481 FILE *fp;
4482 int protolen = strlen(proto);
4483 int keylen = strlen(key);
4484
4485 *result = 0;
4486
4487 if ((fp = net_snmp_open()) == NULL)
4488 return -1;
4489
4490 while (fgets(buf, sizeof(buf), fp) != NULL) {
4491 char *p = buf;
4492 int pos = 0;
4493
4494 if (memcmp(buf, proto, protolen))
4495 continue;
4496 while ((p = strchr(p, ' ')) != NULL) {
4497 pos++;
4498 p++;
4499 if (memcmp(p, key, keylen) == 0 &&
4500 (p[keylen] == ' ' || p[keylen] == '\n'))
4501 break;
4502 }
4503 if (fgets(buf, sizeof(buf), fp) == NULL)
4504 break;
4505 if (memcmp(buf, proto, protolen))
4506 break;
4507 p = buf;
4508 while ((p = strchr(p, ' ')) != NULL) {
4509 p++;
4510 if (--pos == 0) {
4511 sscanf(p, "%d", result);
4512 fclose(fp);
4513 return 0;
4514 }
4515 }
4516 }
4517
4518 fclose(fp);
4519 errno = ESRCH;
4520 return -1;
4521 }
4522
4523
4524 /* Get stats from sockstat */
4525
4526 struct ssummary {
4527 int socks;
4528 int tcp_mem;
4529 int tcp_total;
4530 int tcp_orphans;
4531 int tcp_tws;
4532 int tcp4_hashed;
4533 int udp4;
4534 int raw4;
4535 int frag4;
4536 int frag4_mem;
4537 int tcp6_hashed;
4538 int udp6;
4539 int raw6;
4540 int frag6;
4541 int frag6_mem;
4542 };
4543
4544 static void get_sockstat_line(char *line, struct ssummary *s)
4545 {
4546 char id[256], rem[256];
4547
4548 if (sscanf(line, "%[^ ] %[^\n]\n", id, rem) != 2)
4549 return;
4550
4551 if (strcmp(id, "sockets:") == 0)
4552 sscanf(rem, "%*s%d", &s->socks);
4553 else if (strcmp(id, "UDP:") == 0)
4554 sscanf(rem, "%*s%d", &s->udp4);
4555 else if (strcmp(id, "UDP6:") == 0)
4556 sscanf(rem, "%*s%d", &s->udp6);
4557 else if (strcmp(id, "RAW:") == 0)
4558 sscanf(rem, "%*s%d", &s->raw4);
4559 else if (strcmp(id, "RAW6:") == 0)
4560 sscanf(rem, "%*s%d", &s->raw6);
4561 else if (strcmp(id, "TCP6:") == 0)
4562 sscanf(rem, "%*s%d", &s->tcp6_hashed);
4563 else if (strcmp(id, "FRAG:") == 0)
4564 sscanf(rem, "%*s%d%*s%d", &s->frag4, &s->frag4_mem);
4565 else if (strcmp(id, "FRAG6:") == 0)
4566 sscanf(rem, "%*s%d%*s%d", &s->frag6, &s->frag6_mem);
4567 else if (strcmp(id, "TCP:") == 0)
4568 sscanf(rem, "%*s%d%*s%d%*s%d%*s%d%*s%d",
4569 &s->tcp4_hashed,
4570 &s->tcp_orphans, &s->tcp_tws, &s->tcp_total, &s->tcp_mem);
4571 }
4572
4573 static int get_sockstat(struct ssummary *s)
4574 {
4575 char buf[256];
4576 FILE *fp;
4577
4578 memset(s, 0, sizeof(*s));
4579
4580 if ((fp = net_sockstat_open()) == NULL)
4581 return -1;
4582 while (fgets(buf, sizeof(buf), fp) != NULL)
4583 get_sockstat_line(buf, s);
4584 fclose(fp);
4585
4586 if ((fp = net_sockstat6_open()) == NULL)
4587 return 0;
4588 while (fgets(buf, sizeof(buf), fp) != NULL)
4589 get_sockstat_line(buf, s);
4590 fclose(fp);
4591
4592 return 0;
4593 }
4594
4595 static int print_summary(void)
4596 {
4597 struct ssummary s;
4598 int tcp_estab;
4599
4600 if (get_sockstat(&s) < 0)
4601 perror("ss: get_sockstat");
4602 if (get_snmp_int("Tcp:", "CurrEstab", &tcp_estab) < 0)
4603 perror("ss: get_snmpstat");
4604
4605 printf("Total: %d\n", s.socks);
4606
4607 printf("TCP: %d (estab %d, closed %d, orphaned %d, timewait %d)\n",
4608 s.tcp_total + s.tcp_tws, tcp_estab,
4609 s.tcp_total - (s.tcp4_hashed + s.tcp6_hashed - s.tcp_tws),
4610 s.tcp_orphans, s.tcp_tws);
4611
4612 printf("\n");
4613 printf("Transport Total IP IPv6\n");
4614 printf("RAW %-9d %-9d %-9d\n", s.raw4+s.raw6, s.raw4, s.raw6);
4615 printf("UDP %-9d %-9d %-9d\n", s.udp4+s.udp6, s.udp4, s.udp6);
4616 printf("TCP %-9d %-9d %-9d\n", s.tcp4_hashed+s.tcp6_hashed, s.tcp4_hashed, s.tcp6_hashed);
4617 printf("INET %-9d %-9d %-9d\n",
4618 s.raw4+s.udp4+s.tcp4_hashed+
4619 s.raw6+s.udp6+s.tcp6_hashed,
4620 s.raw4+s.udp4+s.tcp4_hashed,
4621 s.raw6+s.udp6+s.tcp6_hashed);
4622 printf("FRAG %-9d %-9d %-9d\n", s.frag4+s.frag6, s.frag4, s.frag6);
4623
4624 printf("\n");
4625
4626 return 0;
4627 }
4628
4629 static void _usage(FILE *dest)
4630 {
4631 fprintf(dest,
4632 "Usage: ss [ OPTIONS ]\n"
4633 " ss [ OPTIONS ] [ FILTER ]\n"
4634 " -h, --help this message\n"
4635 " -V, --version output version information\n"
4636 " -n, --numeric don't resolve service names\n"
4637 " -r, --resolve resolve host names\n"
4638 " -a, --all display all sockets\n"
4639 " -l, --listening display listening sockets\n"
4640 " -o, --options show timer information\n"
4641 " -e, --extended show detailed socket information\n"
4642 " -m, --memory show socket memory usage\n"
4643 " -p, --processes show process using socket\n"
4644 " -i, --info show internal TCP information\n"
4645 " --tipcinfo show internal tipc socket information\n"
4646 " -s, --summary show socket usage summary\n"
4647 " -b, --bpf show bpf filter socket information\n"
4648 " -E, --events continually display sockets as they are destroyed\n"
4649 " -Z, --context display process SELinux security contexts\n"
4650 " -z, --contexts display process and socket SELinux security contexts\n"
4651 " -N, --net switch to the specified network namespace name\n"
4652 "\n"
4653 " -4, --ipv4 display only IP version 4 sockets\n"
4654 " -6, --ipv6 display only IP version 6 sockets\n"
4655 " -0, --packet display PACKET sockets\n"
4656 " -t, --tcp display only TCP sockets\n"
4657 " -S, --sctp display only SCTP sockets\n"
4658 " -u, --udp display only UDP sockets\n"
4659 " -d, --dccp display only DCCP sockets\n"
4660 " -w, --raw display only RAW sockets\n"
4661 " -x, --unix display only Unix domain sockets\n"
4662 " --tipc display only TIPC sockets\n"
4663 " --vsock display only vsock sockets\n"
4664 " -f, --family=FAMILY display sockets of type FAMILY\n"
4665 " FAMILY := {inet|inet6|link|unix|netlink|vsock|tipc|help}\n"
4666 "\n"
4667 " -K, --kill forcibly close sockets, display what was closed\n"
4668 " -H, --no-header Suppress header line\n"
4669 "\n"
4670 " -A, --query=QUERY, --socket=QUERY\n"
4671 " QUERY := {all|inet|tcp|udp|raw|unix|unix_dgram|unix_stream|unix_seqpacket|packet|netlink|vsock_stream|vsock_dgram|tipc}[,QUERY]\n"
4672 "\n"
4673 " -D, --diag=FILE Dump raw information about TCP sockets to FILE\n"
4674 " -F, --filter=FILE read filter information from FILE\n"
4675 " FILTER := [ state STATE-FILTER ] [ EXPRESSION ]\n"
4676 " STATE-FILTER := {all|connected|synchronized|bucket|big|TCP-STATES}\n"
4677 " TCP-STATES := {established|syn-sent|syn-recv|fin-wait-{1,2}|time-wait|closed|close-wait|last-ack|listening|closing}\n"
4678 " connected := {established|syn-sent|syn-recv|fin-wait-{1,2}|time-wait|close-wait|last-ack|closing}\n"
4679 " synchronized := {established|syn-recv|fin-wait-{1,2}|time-wait|close-wait|last-ack|closing}\n"
4680 " bucket := {syn-recv|time-wait}\n"
4681 " big := {established|syn-sent|fin-wait-{1,2}|closed|close-wait|last-ack|listening|closing}\n"
4682 );
4683 }
4684
4685 static void help(void) __attribute__((noreturn));
4686 static void help(void)
4687 {
4688 _usage(stdout);
4689 exit(0);
4690 }
4691
4692 static void usage(void) __attribute__((noreturn));
4693 static void usage(void)
4694 {
4695 _usage(stderr);
4696 exit(-1);
4697 }
4698
4699
4700 static int scan_state(const char *state)
4701 {
4702 static const char * const sstate_namel[] = {
4703 "UNKNOWN",
4704 [SS_ESTABLISHED] = "established",
4705 [SS_SYN_SENT] = "syn-sent",
4706 [SS_SYN_RECV] = "syn-recv",
4707 [SS_FIN_WAIT1] = "fin-wait-1",
4708 [SS_FIN_WAIT2] = "fin-wait-2",
4709 [SS_TIME_WAIT] = "time-wait",
4710 [SS_CLOSE] = "unconnected",
4711 [SS_CLOSE_WAIT] = "close-wait",
4712 [SS_LAST_ACK] = "last-ack",
4713 [SS_LISTEN] = "listening",
4714 [SS_CLOSING] = "closing",
4715 };
4716 int i;
4717
4718 if (strcasecmp(state, "close") == 0 ||
4719 strcasecmp(state, "closed") == 0)
4720 return (1<<SS_CLOSE);
4721 if (strcasecmp(state, "syn-rcv") == 0)
4722 return (1<<SS_SYN_RECV);
4723 if (strcasecmp(state, "established") == 0)
4724 return (1<<SS_ESTABLISHED);
4725 if (strcasecmp(state, "all") == 0)
4726 return SS_ALL;
4727 if (strcasecmp(state, "connected") == 0)
4728 return SS_ALL & ~((1<<SS_CLOSE)|(1<<SS_LISTEN));
4729 if (strcasecmp(state, "synchronized") == 0)
4730 return SS_ALL & ~((1<<SS_CLOSE)|(1<<SS_LISTEN)|(1<<SS_SYN_SENT));
4731 if (strcasecmp(state, "bucket") == 0)
4732 return (1<<SS_SYN_RECV)|(1<<SS_TIME_WAIT);
4733 if (strcasecmp(state, "big") == 0)
4734 return SS_ALL & ~((1<<SS_SYN_RECV)|(1<<SS_TIME_WAIT));
4735 for (i = 0; i < SS_MAX; i++) {
4736 if (strcasecmp(state, sstate_namel[i]) == 0)
4737 return (1<<i);
4738 }
4739
4740 fprintf(stderr, "ss: wrong state name: %s\n", state);
4741 exit(-1);
4742 }
4743
4744 /* Values 'v' and 'V' are already used so a non-character is used */
4745 #define OPT_VSOCK 256
4746
4747 /* Values of 't' are already used so a non-character is used */
4748 #define OPT_TIPCSOCK 257
4749 #define OPT_TIPCINFO 258
4750
4751 static const struct option long_opts[] = {
4752 { "numeric", 0, 0, 'n' },
4753 { "resolve", 0, 0, 'r' },
4754 { "options", 0, 0, 'o' },
4755 { "extended", 0, 0, 'e' },
4756 { "memory", 0, 0, 'm' },
4757 { "info", 0, 0, 'i' },
4758 { "processes", 0, 0, 'p' },
4759 { "bpf", 0, 0, 'b' },
4760 { "events", 0, 0, 'E' },
4761 { "dccp", 0, 0, 'd' },
4762 { "tcp", 0, 0, 't' },
4763 { "sctp", 0, 0, 'S' },
4764 { "udp", 0, 0, 'u' },
4765 { "raw", 0, 0, 'w' },
4766 { "unix", 0, 0, 'x' },
4767 { "tipc", 0, 0, OPT_TIPCSOCK},
4768 { "vsock", 0, 0, OPT_VSOCK },
4769 { "all", 0, 0, 'a' },
4770 { "listening", 0, 0, 'l' },
4771 { "ipv4", 0, 0, '4' },
4772 { "ipv6", 0, 0, '6' },
4773 { "packet", 0, 0, '0' },
4774 { "family", 1, 0, 'f' },
4775 { "socket", 1, 0, 'A' },
4776 { "query", 1, 0, 'A' },
4777 { "summary", 0, 0, 's' },
4778 { "diag", 1, 0, 'D' },
4779 { "filter", 1, 0, 'F' },
4780 { "version", 0, 0, 'V' },
4781 { "help", 0, 0, 'h' },
4782 { "context", 0, 0, 'Z' },
4783 { "contexts", 0, 0, 'z' },
4784 { "net", 1, 0, 'N' },
4785 { "tipcinfo", 0, 0, OPT_TIPCINFO},
4786 { "kill", 0, 0, 'K' },
4787 { "no-header", 0, 0, 'H' },
4788 { 0 }
4789
4790 };
4791
4792 int main(int argc, char *argv[])
4793 {
4794 int saw_states = 0;
4795 int saw_query = 0;
4796 int do_summary = 0;
4797 const char *dump_tcpdiag = NULL;
4798 FILE *filter_fp = NULL;
4799 int ch;
4800 int state_filter = 0;
4801
4802 while ((ch = getopt_long(argc, argv,
4803 "dhaletuwxnro460spbEf:miA:D:F:vVzZN:KHS",
4804 long_opts, NULL)) != EOF) {
4805 switch (ch) {
4806 case 'n':
4807 resolve_services = 0;
4808 break;
4809 case 'r':
4810 resolve_hosts = 1;
4811 break;
4812 case 'o':
4813 show_options = 1;
4814 break;
4815 case 'e':
4816 show_options = 1;
4817 show_details++;
4818 break;
4819 case 'm':
4820 show_mem = 1;
4821 break;
4822 case 'i':
4823 show_tcpinfo = 1;
4824 break;
4825 case 'p':
4826 show_users++;
4827 user_ent_hash_build();
4828 break;
4829 case 'b':
4830 show_options = 1;
4831 show_bpf++;
4832 break;
4833 case 'E':
4834 follow_events = 1;
4835 break;
4836 case 'd':
4837 filter_db_set(&current_filter, DCCP_DB, true);
4838 break;
4839 case 't':
4840 filter_db_set(&current_filter, TCP_DB, true);
4841 break;
4842 case 'S':
4843 filter_db_set(&current_filter, SCTP_DB, true);
4844 break;
4845 case 'u':
4846 filter_db_set(&current_filter, UDP_DB, true);
4847 break;
4848 case 'w':
4849 filter_db_set(&current_filter, RAW_DB, true);
4850 break;
4851 case 'x':
4852 filter_af_set(&current_filter, AF_UNIX);
4853 break;
4854 case OPT_VSOCK:
4855 filter_af_set(&current_filter, AF_VSOCK);
4856 break;
4857 case OPT_TIPCSOCK:
4858 filter_af_set(&current_filter, AF_TIPC);
4859 break;
4860 case 'a':
4861 state_filter = SS_ALL;
4862 break;
4863 case 'l':
4864 state_filter = (1 << SS_LISTEN) | (1 << SS_CLOSE);
4865 break;
4866 case '4':
4867 filter_af_set(&current_filter, AF_INET);
4868 break;
4869 case '6':
4870 filter_af_set(&current_filter, AF_INET6);
4871 break;
4872 case '0':
4873 filter_af_set(&current_filter, AF_PACKET);
4874 break;
4875 case 'f':
4876 if (strcmp(optarg, "inet") == 0)
4877 filter_af_set(&current_filter, AF_INET);
4878 else if (strcmp(optarg, "inet6") == 0)
4879 filter_af_set(&current_filter, AF_INET6);
4880 else if (strcmp(optarg, "link") == 0)
4881 filter_af_set(&current_filter, AF_PACKET);
4882 else if (strcmp(optarg, "unix") == 0)
4883 filter_af_set(&current_filter, AF_UNIX);
4884 else if (strcmp(optarg, "netlink") == 0)
4885 filter_af_set(&current_filter, AF_NETLINK);
4886 else if (strcmp(optarg, "tipc") == 0)
4887 filter_af_set(&current_filter, AF_TIPC);
4888 else if (strcmp(optarg, "vsock") == 0)
4889 filter_af_set(&current_filter, AF_VSOCK);
4890 else if (strcmp(optarg, "help") == 0)
4891 help();
4892 else {
4893 fprintf(stderr, "ss: \"%s\" is invalid family\n",
4894 optarg);
4895 usage();
4896 }
4897 break;
4898 case 'A':
4899 {
4900 char *p, *p1;
4901
4902 if (!saw_query) {
4903 current_filter.dbs = 0;
4904 state_filter = state_filter ?
4905 state_filter : SS_CONN;
4906 saw_query = 1;
4907 do_default = 0;
4908 }
4909 p = p1 = optarg;
4910 do {
4911 if ((p1 = strchr(p, ',')) != NULL)
4912 *p1 = 0;
4913 if (filter_db_parse(&current_filter, p)) {
4914 fprintf(stderr, "ss: \"%s\" is illegal socket table id\n", p);
4915 usage();
4916 }
4917 p = p1 + 1;
4918 } while (p1);
4919 break;
4920 }
4921 case 's':
4922 do_summary = 1;
4923 break;
4924 case 'D':
4925 dump_tcpdiag = optarg;
4926 break;
4927 case 'F':
4928 if (filter_fp) {
4929 fprintf(stderr, "More than one filter file\n");
4930 exit(-1);
4931 }
4932 if (optarg[0] == '-')
4933 filter_fp = stdin;
4934 else
4935 filter_fp = fopen(optarg, "r");
4936 if (!filter_fp) {
4937 perror("fopen filter file");
4938 exit(-1);
4939 }
4940 break;
4941 case 'v':
4942 case 'V':
4943 printf("ss utility, iproute2-ss%s\n", SNAPSHOT);
4944 exit(0);
4945 case 'z':
4946 show_sock_ctx++;
4947 /* fall through */
4948 case 'Z':
4949 if (is_selinux_enabled() <= 0) {
4950 fprintf(stderr, "ss: SELinux is not enabled.\n");
4951 exit(1);
4952 }
4953 show_proc_ctx++;
4954 user_ent_hash_build();
4955 break;
4956 case 'N':
4957 if (netns_switch(optarg))
4958 exit(1);
4959 break;
4960 case OPT_TIPCINFO:
4961 show_tipcinfo = 1;
4962 break;
4963 case 'K':
4964 current_filter.kill = 1;
4965 break;
4966 case 'H':
4967 show_header = 0;
4968 break;
4969 case 'h':
4970 help();
4971 case '?':
4972 default:
4973 usage();
4974 }
4975 }
4976
4977 argc -= optind;
4978 argv += optind;
4979
4980 if (do_summary) {
4981 print_summary();
4982 if (do_default && argc == 0)
4983 exit(0);
4984 }
4985
4986 while (argc > 0) {
4987 if (strcmp(*argv, "state") == 0) {
4988 NEXT_ARG();
4989 if (!saw_states)
4990 state_filter = 0;
4991 state_filter |= scan_state(*argv);
4992 saw_states = 1;
4993 } else if (strcmp(*argv, "exclude") == 0 ||
4994 strcmp(*argv, "excl") == 0) {
4995 NEXT_ARG();
4996 if (!saw_states)
4997 state_filter = SS_ALL;
4998 state_filter &= ~scan_state(*argv);
4999 saw_states = 1;
5000 } else {
5001 break;
5002 }
5003 argc--; argv++;
5004 }
5005
5006 if (do_default) {
5007 state_filter = state_filter ? state_filter : SS_CONN;
5008 filter_db_parse(&current_filter, "all");
5009 }
5010
5011 filter_states_set(&current_filter, state_filter);
5012 filter_merge_defaults(&current_filter);
5013
5014 if (resolve_services && resolve_hosts &&
5015 (current_filter.dbs & (UNIX_DBM|INET_L4_DBM)))
5016 init_service_resolver();
5017
5018 if (current_filter.dbs == 0) {
5019 fprintf(stderr, "ss: no socket tables to show with such filter.\n");
5020 exit(0);
5021 }
5022 if (current_filter.families == 0) {
5023 fprintf(stderr, "ss: no families to show with such filter.\n");
5024 exit(0);
5025 }
5026 if (current_filter.states == 0) {
5027 fprintf(stderr, "ss: no socket states to show with such filter.\n");
5028 exit(0);
5029 }
5030
5031 if (dump_tcpdiag) {
5032 FILE *dump_fp = stdout;
5033
5034 if (!(current_filter.dbs & (1<<TCP_DB))) {
5035 fprintf(stderr, "ss: tcpdiag dump requested and no tcp in filter.\n");
5036 exit(0);
5037 }
5038 if (dump_tcpdiag[0] != '-') {
5039 dump_fp = fopen(dump_tcpdiag, "w");
5040 if (!dump_tcpdiag) {
5041 perror("fopen dump file");
5042 exit(-1);
5043 }
5044 }
5045 inet_show_netlink(&current_filter, dump_fp, IPPROTO_TCP);
5046 fflush(dump_fp);
5047 exit(0);
5048 }
5049
5050 if (ssfilter_parse(&current_filter.f, argc, argv, filter_fp))
5051 usage();
5052
5053 if (!(current_filter.dbs & (current_filter.dbs - 1)))
5054 columns[COL_NETID].disabled = 1;
5055
5056 if (!(current_filter.states & (current_filter.states - 1)))
5057 columns[COL_STATE].disabled = 1;
5058
5059 if (show_header)
5060 print_header();
5061
5062 fflush(stdout);
5063
5064 if (follow_events)
5065 exit(handle_follow_request(&current_filter));
5066
5067 if (current_filter.dbs & (1<<NETLINK_DB))
5068 netlink_show(&current_filter);
5069 if (current_filter.dbs & PACKET_DBM)
5070 packet_show(&current_filter);
5071 if (current_filter.dbs & UNIX_DBM)
5072 unix_show(&current_filter);
5073 if (current_filter.dbs & (1<<RAW_DB))
5074 raw_show(&current_filter);
5075 if (current_filter.dbs & (1<<UDP_DB))
5076 udp_show(&current_filter);
5077 if (current_filter.dbs & (1<<TCP_DB))
5078 tcp_show(&current_filter);
5079 if (current_filter.dbs & (1<<DCCP_DB))
5080 dccp_show(&current_filter);
5081 if (current_filter.dbs & (1<<SCTP_DB))
5082 sctp_show(&current_filter);
5083 if (current_filter.dbs & VSOCK_DBM)
5084 vsock_show(&current_filter);
5085 if (current_filter.dbs & (1<<TIPC_DB))
5086 tipc_show(&current_filter);
5087
5088 if (show_users || show_proc_ctx || show_sock_ctx)
5089 user_ent_destroy();
5090
5091 render();
5092
5093 return 0;
5094 }
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