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Merge branch 'master' into net-next
[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 <syslog.h>
16 #include <fcntl.h>
17 #include <sys/ioctl.h>
18 #include <sys/socket.h>
19 #include <sys/uio.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
30 #include "utils.h"
31 #include "rt_names.h"
32 #include "ll_map.h"
33 #include "libnetlink.h"
34 #include "namespace.h"
35 #include "SNAPSHOT.h"
36
37 #include <linux/tcp.h>
38 #include <linux/sock_diag.h>
39 #include <linux/inet_diag.h>
40 #include <linux/unix_diag.h>
41 #include <linux/netdevice.h> /* for MAX_ADDR_LEN */
42 #include <linux/filter.h>
43 #include <linux/packet_diag.h>
44 #include <linux/netlink_diag.h>
45
46 #define MAGIC_SEQ 123456
47
48 #define DIAG_REQUEST(_req, _r) \
49 struct { \
50 struct nlmsghdr nlh; \
51 _r; \
52 } _req = { \
53 .nlh = { \
54 .nlmsg_type = SOCK_DIAG_BY_FAMILY, \
55 .nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST,\
56 .nlmsg_seq = MAGIC_SEQ, \
57 .nlmsg_len = sizeof(_req), \
58 }, \
59 }
60
61 #if HAVE_SELINUX
62 #include <selinux/selinux.h>
63 #else
64 /* Stubs for SELinux functions */
65 static int is_selinux_enabled(void)
66 {
67 return -1;
68 }
69
70 static int getpidcon(pid_t pid, char **context)
71 {
72 *context = NULL;
73 return -1;
74 }
75
76 static int getfilecon(char *path, char **context)
77 {
78 *context = NULL;
79 return -1;
80 }
81
82 static int security_get_initial_context(char *name, char **context)
83 {
84 *context = NULL;
85 return -1;
86 }
87 #endif
88
89 int resolve_hosts = 0;
90 int resolve_services = 1;
91 int preferred_family = AF_UNSPEC;
92 int show_options = 0;
93 int show_details = 0;
94 int show_users = 0;
95 int show_mem = 0;
96 int show_tcpinfo = 0;
97 int show_bpf = 0;
98 int show_proc_ctx = 0;
99 int show_sock_ctx = 0;
100 /* If show_users & show_proc_ctx only do user_ent_hash_build() once */
101 int user_ent_hash_build_init = 0;
102
103 int netid_width;
104 int state_width;
105 int addrp_width;
106 int addr_width;
107 int serv_width;
108 int screen_width;
109
110 static const char *TCP_PROTO = "tcp";
111 static const char *UDP_PROTO = "udp";
112 static const char *RAW_PROTO = "raw";
113 static const char *dg_proto = NULL;
114
115 enum
116 {
117 TCP_DB,
118 DCCP_DB,
119 UDP_DB,
120 RAW_DB,
121 UNIX_DG_DB,
122 UNIX_ST_DB,
123 UNIX_SQ_DB,
124 PACKET_DG_DB,
125 PACKET_R_DB,
126 NETLINK_DB,
127 MAX_DB
128 };
129
130 #define PACKET_DBM ((1<<PACKET_DG_DB)|(1<<PACKET_R_DB))
131 #define UNIX_DBM ((1<<UNIX_DG_DB)|(1<<UNIX_ST_DB)|(1<<UNIX_SQ_DB))
132 #define ALL_DB ((1<<MAX_DB)-1)
133 #define INET_DBM ((1<<TCP_DB)|(1<<UDP_DB)|(1<<DCCP_DB)|(1<<RAW_DB))
134
135 enum {
136 SS_UNKNOWN,
137 SS_ESTABLISHED,
138 SS_SYN_SENT,
139 SS_SYN_RECV,
140 SS_FIN_WAIT1,
141 SS_FIN_WAIT2,
142 SS_TIME_WAIT,
143 SS_CLOSE,
144 SS_CLOSE_WAIT,
145 SS_LAST_ACK,
146 SS_LISTEN,
147 SS_CLOSING,
148 SS_MAX
149 };
150
151 #define SS_ALL ((1 << SS_MAX) - 1)
152 #define SS_CONN (SS_ALL & ~((1<<SS_LISTEN)|(1<<SS_CLOSE)|(1<<SS_TIME_WAIT)|(1<<SS_SYN_RECV)))
153
154 #include "ssfilter.h"
155
156 struct filter
157 {
158 int dbs;
159 int states;
160 int families;
161 struct ssfilter *f;
162 };
163
164 static const struct filter default_dbs[MAX_DB] = {
165 [TCP_DB] = {
166 .states = SS_CONN,
167 .families = (1 << AF_INET) | (1 << AF_INET6),
168 },
169 [DCCP_DB] = {
170 .states = SS_CONN,
171 .families = (1 << AF_INET) | (1 << AF_INET6),
172 },
173 [UDP_DB] = {
174 .states = (1 << SS_ESTABLISHED),
175 .families = (1 << AF_INET) | (1 << AF_INET6),
176 },
177 [RAW_DB] = {
178 .states = (1 << SS_ESTABLISHED),
179 .families = (1 << AF_INET) | (1 << AF_INET6),
180 },
181 [UNIX_DG_DB] = {
182 .states = (1 << SS_CLOSE),
183 .families = (1 << AF_UNIX),
184 },
185 [UNIX_ST_DB] = {
186 .states = SS_CONN,
187 .families = (1 << AF_UNIX),
188 },
189 [UNIX_SQ_DB] = {
190 .states = SS_CONN,
191 .families = (1 << AF_UNIX),
192 },
193 [PACKET_DG_DB] = {
194 .states = (1 << SS_CLOSE),
195 .families = (1 << AF_PACKET),
196 },
197 [PACKET_R_DB] = {
198 .states = (1 << SS_CLOSE),
199 .families = (1 << AF_PACKET),
200 },
201 [NETLINK_DB] = {
202 .states = (1 << SS_CLOSE),
203 .families = (1 << AF_NETLINK),
204 },
205 };
206
207 static const struct filter default_afs[AF_MAX] = {
208 [AF_INET] = {
209 .dbs = INET_DBM,
210 .states = SS_CONN,
211 },
212 [AF_INET6] = {
213 .dbs = INET_DBM,
214 .states = SS_CONN,
215 },
216 [AF_UNIX] = {
217 .dbs = UNIX_DBM,
218 .states = SS_CONN,
219 },
220 [AF_PACKET] = {
221 .dbs = PACKET_DBM,
222 .states = (1 << SS_CLOSE),
223 },
224 [AF_NETLINK] = {
225 .dbs = (1 << NETLINK_DB),
226 .states = (1 << SS_CLOSE),
227 },
228 };
229
230 static int do_default = 1;
231 static struct filter current_filter;
232
233 static void filter_db_set(struct filter *f, int db)
234 {
235 f->states |= default_dbs[db].states;
236 f->dbs |= 1 << db;
237 do_default = 0;
238 }
239
240 static void filter_af_set(struct filter *f, int af)
241 {
242 f->states |= default_afs[af].states;
243 f->families |= 1 << af;
244 do_default = 0;
245 preferred_family = af;
246 }
247
248 static int filter_af_get(struct filter *f, int af)
249 {
250 return f->families & (1 << af);
251 }
252
253 static void filter_default_dbs(struct filter *f)
254 {
255 filter_db_set(f, UDP_DB);
256 filter_db_set(f, DCCP_DB);
257 filter_db_set(f, TCP_DB);
258 filter_db_set(f, RAW_DB);
259 filter_db_set(f, UNIX_ST_DB);
260 filter_db_set(f, UNIX_DG_DB);
261 filter_db_set(f, UNIX_SQ_DB);
262 filter_db_set(f, PACKET_R_DB);
263 filter_db_set(f, PACKET_DG_DB);
264 filter_db_set(f, NETLINK_DB);
265 }
266
267 static void filter_states_set(struct filter *f, int states)
268 {
269 if (states)
270 f->states = (f->states | states) & states;
271 }
272
273 static void filter_merge_defaults(struct filter *f)
274 {
275 int db;
276 int af;
277
278 for (db = 0; db < MAX_DB; db++) {
279 if (!(f->dbs & (1 << db)))
280 continue;
281
282 if (!(default_dbs[db].families & f->families))
283 f->families |= default_dbs[db].families;
284 }
285 for (af = 0; af < AF_MAX; af++) {
286 if (!(f->families & (1 << af)))
287 continue;
288
289 if (!(default_afs[af].dbs & f->dbs))
290 f->dbs |= default_afs[af].dbs;
291 }
292 }
293
294 static FILE *generic_proc_open(const char *env, const char *name)
295 {
296 const char *p = getenv(env);
297 char store[128];
298
299 if (!p) {
300 p = getenv("PROC_ROOT") ? : "/proc";
301 snprintf(store, sizeof(store)-1, "%s/%s", p, name);
302 p = store;
303 }
304
305 return fopen(p, "r");
306 }
307
308 static FILE *net_tcp_open(void)
309 {
310 return generic_proc_open("PROC_NET_TCP", "net/tcp");
311 }
312
313 static FILE *net_tcp6_open(void)
314 {
315 return generic_proc_open("PROC_NET_TCP6", "net/tcp6");
316 }
317
318 static FILE *net_udp_open(void)
319 {
320 return generic_proc_open("PROC_NET_UDP", "net/udp");
321 }
322
323 static FILE *net_udp6_open(void)
324 {
325 return generic_proc_open("PROC_NET_UDP6", "net/udp6");
326 }
327
328 static FILE *net_raw_open(void)
329 {
330 return generic_proc_open("PROC_NET_RAW", "net/raw");
331 }
332
333 static FILE *net_raw6_open(void)
334 {
335 return generic_proc_open("PROC_NET_RAW6", "net/raw6");
336 }
337
338 static FILE *net_unix_open(void)
339 {
340 return generic_proc_open("PROC_NET_UNIX", "net/unix");
341 }
342
343 static FILE *net_packet_open(void)
344 {
345 return generic_proc_open("PROC_NET_PACKET", "net/packet");
346 }
347
348 static FILE *net_netlink_open(void)
349 {
350 return generic_proc_open("PROC_NET_NETLINK", "net/netlink");
351 }
352
353 static FILE *slabinfo_open(void)
354 {
355 return generic_proc_open("PROC_SLABINFO", "slabinfo");
356 }
357
358 static FILE *net_sockstat_open(void)
359 {
360 return generic_proc_open("PROC_NET_SOCKSTAT", "net/sockstat");
361 }
362
363 static FILE *net_sockstat6_open(void)
364 {
365 return generic_proc_open("PROC_NET_SOCKSTAT6", "net/sockstat6");
366 }
367
368 static FILE *net_snmp_open(void)
369 {
370 return generic_proc_open("PROC_NET_SNMP", "net/snmp");
371 }
372
373 static FILE *ephemeral_ports_open(void)
374 {
375 return generic_proc_open("PROC_IP_LOCAL_PORT_RANGE", "sys/net/ipv4/ip_local_port_range");
376 }
377
378 struct user_ent {
379 struct user_ent *next;
380 unsigned int ino;
381 int pid;
382 int fd;
383 char *process;
384 char *process_ctx;
385 char *socket_ctx;
386 };
387
388 #define USER_ENT_HASH_SIZE 256
389 struct user_ent *user_ent_hash[USER_ENT_HASH_SIZE];
390
391 static int user_ent_hashfn(unsigned int ino)
392 {
393 int val = (ino >> 24) ^ (ino >> 16) ^ (ino >> 8) ^ ino;
394
395 return val & (USER_ENT_HASH_SIZE - 1);
396 }
397
398 static void user_ent_add(unsigned int ino, char *process,
399 int pid, int fd,
400 char *proc_ctx,
401 char *sock_ctx)
402 {
403 struct user_ent *p, **pp;
404
405 p = malloc(sizeof(struct user_ent));
406 if (!p) {
407 fprintf(stderr, "ss: failed to malloc buffer\n");
408 abort();
409 }
410 p->next = NULL;
411 p->ino = ino;
412 p->pid = pid;
413 p->fd = fd;
414 p->process = strdup(process);
415 p->process_ctx = strdup(proc_ctx);
416 p->socket_ctx = strdup(sock_ctx);
417
418 pp = &user_ent_hash[user_ent_hashfn(ino)];
419 p->next = *pp;
420 *pp = p;
421 }
422
423 static void user_ent_destroy(void)
424 {
425 struct user_ent *p, *p_next;
426 int cnt = 0;
427
428 while (cnt != USER_ENT_HASH_SIZE) {
429 p = user_ent_hash[cnt];
430 while (p) {
431 free(p->process);
432 free(p->process_ctx);
433 free(p->socket_ctx);
434 p_next = p->next;
435 free(p);
436 p = p_next;
437 }
438 cnt++;
439 }
440 }
441
442 static void user_ent_hash_build(void)
443 {
444 const char *root = getenv("PROC_ROOT") ? : "/proc/";
445 struct dirent *d;
446 char name[1024];
447 int nameoff;
448 DIR *dir;
449 char *pid_context;
450 char *sock_context;
451 const char *no_ctx = "unavailable";
452
453 /* If show_users & show_proc_ctx set only do this once */
454 if (user_ent_hash_build_init != 0)
455 return;
456
457 user_ent_hash_build_init = 1;
458
459 strcpy(name, root);
460 if (strlen(name) == 0 || name[strlen(name)-1] != '/')
461 strcat(name, "/");
462
463 nameoff = strlen(name);
464
465 dir = opendir(name);
466 if (!dir)
467 return;
468
469 while ((d = readdir(dir)) != NULL) {
470 struct dirent *d1;
471 char process[16];
472 char *p;
473 int pid, pos;
474 DIR *dir1;
475 char crap;
476
477 if (sscanf(d->d_name, "%d%c", &pid, &crap) != 1)
478 continue;
479
480 if (getpidcon(pid, &pid_context) != 0)
481 pid_context = strdup(no_ctx);
482
483 sprintf(name + nameoff, "%d/fd/", pid);
484 pos = strlen(name);
485 if ((dir1 = opendir(name)) == NULL)
486 continue;
487
488 process[0] = '\0';
489 p = process;
490
491 while ((d1 = readdir(dir1)) != NULL) {
492 const char *pattern = "socket:[";
493 unsigned int ino;
494 char lnk[64];
495 int fd;
496 ssize_t link_len;
497 char tmp[1024];
498
499 if (sscanf(d1->d_name, "%d%c", &fd, &crap) != 1)
500 continue;
501
502 sprintf(name+pos, "%d", fd);
503
504 link_len = readlink(name, lnk, sizeof(lnk)-1);
505 if (link_len == -1)
506 continue;
507 lnk[link_len] = '\0';
508
509 if (strncmp(lnk, pattern, strlen(pattern)))
510 continue;
511
512 sscanf(lnk, "socket:[%u]", &ino);
513
514 snprintf(tmp, sizeof(tmp), "%s/%d/fd/%s",
515 root, pid, d1->d_name);
516
517 if (getfilecon(tmp, &sock_context) <= 0)
518 sock_context = strdup(no_ctx);
519
520 if (*p == '\0') {
521 FILE *fp;
522
523 snprintf(tmp, sizeof(tmp), "%s/%d/stat",
524 root, pid);
525 if ((fp = fopen(tmp, "r")) != NULL) {
526 fscanf(fp, "%*d (%[^)])", p);
527 fclose(fp);
528 }
529 }
530 user_ent_add(ino, p, pid, fd,
531 pid_context, sock_context);
532 free(sock_context);
533 }
534 free(pid_context);
535 closedir(dir1);
536 }
537 closedir(dir);
538 }
539
540 enum entry_types {
541 USERS,
542 PROC_CTX,
543 PROC_SOCK_CTX
544 };
545
546 #define ENTRY_BUF_SIZE 512
547 static int find_entry(unsigned ino, char **buf, int type)
548 {
549 struct user_ent *p;
550 int cnt = 0;
551 char *ptr;
552 char **new_buf = buf;
553 int len, new_buf_len;
554 int buf_used = 0;
555 int buf_len = 0;
556
557 if (!ino)
558 return 0;
559
560 p = user_ent_hash[user_ent_hashfn(ino)];
561 ptr = *buf = NULL;
562 while (p) {
563 if (p->ino != ino)
564 goto next;
565
566 while (1) {
567 ptr = *buf + buf_used;
568 switch (type) {
569 case USERS:
570 len = snprintf(ptr, buf_len - buf_used,
571 "(\"%s\",pid=%d,fd=%d),",
572 p->process, p->pid, p->fd);
573 break;
574 case PROC_CTX:
575 len = snprintf(ptr, buf_len - buf_used,
576 "(\"%s\",pid=%d,proc_ctx=%s,fd=%d),",
577 p->process, p->pid,
578 p->process_ctx, p->fd);
579 break;
580 case PROC_SOCK_CTX:
581 len = snprintf(ptr, buf_len - buf_used,
582 "(\"%s\",pid=%d,proc_ctx=%s,fd=%d,sock_ctx=%s),",
583 p->process, p->pid,
584 p->process_ctx, p->fd,
585 p->socket_ctx);
586 break;
587 default:
588 fprintf(stderr, "ss: invalid type: %d\n", type);
589 abort();
590 }
591
592 if (len < 0 || len >= buf_len - buf_used) {
593 new_buf_len = buf_len + ENTRY_BUF_SIZE;
594 *new_buf = realloc(*buf, new_buf_len);
595 if (!new_buf) {
596 fprintf(stderr, "ss: failed to malloc buffer\n");
597 abort();
598 }
599 **buf = **new_buf;
600 buf_len = new_buf_len;
601 continue;
602 } else {
603 buf_used += len;
604 break;
605 }
606 }
607 cnt++;
608 next:
609 p = p->next;
610 }
611 if (buf_used) {
612 ptr = *buf + buf_used;
613 ptr[-1] = '\0';
614 }
615 return cnt;
616 }
617
618 /* Get stats from slab */
619
620 struct slabstat
621 {
622 int socks;
623 int tcp_ports;
624 int tcp_tws;
625 int tcp_syns;
626 int skbs;
627 };
628
629 static struct slabstat slabstat;
630
631 static const char *slabstat_ids[] =
632 {
633 "sock",
634 "tcp_bind_bucket",
635 "tcp_tw_bucket",
636 "tcp_open_request",
637 "skbuff_head_cache",
638 };
639
640 static int get_slabstat(struct slabstat *s)
641 {
642 char buf[256];
643 FILE *fp;
644 int cnt;
645 static int slabstat_valid;
646
647 if (slabstat_valid)
648 return 0;
649
650 memset(s, 0, sizeof(*s));
651
652 fp = slabinfo_open();
653 if (!fp)
654 return -1;
655
656 cnt = sizeof(*s)/sizeof(int);
657
658 fgets(buf, sizeof(buf), fp);
659 while(fgets(buf, sizeof(buf), fp) != NULL) {
660 int i;
661 for (i=0; i<sizeof(slabstat_ids)/sizeof(slabstat_ids[0]); i++) {
662 if (memcmp(buf, slabstat_ids[i], strlen(slabstat_ids[i])) == 0) {
663 sscanf(buf, "%*s%d", ((int *)s) + i);
664 cnt--;
665 break;
666 }
667 }
668 if (cnt <= 0)
669 break;
670 }
671
672 slabstat_valid = 1;
673
674 fclose(fp);
675 return 0;
676 }
677
678 static inline void sock_addr_set_str(inet_prefix *prefix, char **ptr)
679 {
680 memcpy(prefix->data, ptr, sizeof(char *));
681 }
682
683 static inline char *sock_addr_get_str(const inet_prefix *prefix)
684 {
685 char *tmp ;
686 memcpy(&tmp, prefix->data, sizeof(char *));
687 return tmp;
688 }
689
690 static unsigned long long cookie_sk_get(const uint32_t *cookie)
691 {
692 return (((unsigned long long)cookie[1] << 31) << 1) | cookie[0];
693 }
694
695 static const char *sstate_name[] = {
696 "UNKNOWN",
697 [SS_ESTABLISHED] = "ESTAB",
698 [SS_SYN_SENT] = "SYN-SENT",
699 [SS_SYN_RECV] = "SYN-RECV",
700 [SS_FIN_WAIT1] = "FIN-WAIT-1",
701 [SS_FIN_WAIT2] = "FIN-WAIT-2",
702 [SS_TIME_WAIT] = "TIME-WAIT",
703 [SS_CLOSE] = "UNCONN",
704 [SS_CLOSE_WAIT] = "CLOSE-WAIT",
705 [SS_LAST_ACK] = "LAST-ACK",
706 [SS_LISTEN] = "LISTEN",
707 [SS_CLOSING] = "CLOSING",
708 };
709
710 static const char *sstate_namel[] = {
711 "UNKNOWN",
712 [SS_ESTABLISHED] = "established",
713 [SS_SYN_SENT] = "syn-sent",
714 [SS_SYN_RECV] = "syn-recv",
715 [SS_FIN_WAIT1] = "fin-wait-1",
716 [SS_FIN_WAIT2] = "fin-wait-2",
717 [SS_TIME_WAIT] = "time-wait",
718 [SS_CLOSE] = "unconnected",
719 [SS_CLOSE_WAIT] = "close-wait",
720 [SS_LAST_ACK] = "last-ack",
721 [SS_LISTEN] = "listening",
722 [SS_CLOSING] = "closing",
723 };
724
725 struct sockstat
726 {
727 struct sockstat *next;
728 unsigned int type;
729 uint16_t prot;
730 inet_prefix local;
731 inet_prefix remote;
732 int lport;
733 int rport;
734 int state;
735 int rq, wq;
736 unsigned ino;
737 unsigned uid;
738 int refcnt;
739 unsigned int iface;
740 unsigned long long sk;
741 };
742
743 struct dctcpstat
744 {
745 unsigned int ce_state;
746 unsigned int alpha;
747 unsigned int ab_ecn;
748 unsigned int ab_tot;
749 bool enabled;
750 };
751
752 struct tcpstat
753 {
754 struct sockstat ss;
755 int timer;
756 int timeout;
757 int probes;
758 char cong_alg[16];
759 double rto, ato, rtt, rttvar;
760 int qack, cwnd, ssthresh, backoff;
761 double send_bps;
762 int snd_wscale;
763 int rcv_wscale;
764 int mss;
765 unsigned int lastsnd;
766 unsigned int lastrcv;
767 unsigned int lastack;
768 double pacing_rate;
769 double pacing_rate_max;
770 unsigned long long bytes_acked;
771 unsigned long long bytes_received;
772 unsigned int segs_out;
773 unsigned int segs_in;
774 unsigned int unacked;
775 unsigned int retrans;
776 unsigned int retrans_total;
777 unsigned int lost;
778 unsigned int sacked;
779 unsigned int fackets;
780 unsigned int reordering;
781 double rcv_rtt;
782 int rcv_space;
783 bool has_ts_opt;
784 bool has_sack_opt;
785 bool has_ecn_opt;
786 bool has_ecnseen_opt;
787 bool has_fastopen_opt;
788 bool has_wscale_opt;
789 struct dctcpstat *dctcp;
790 };
791
792 static void sock_state_print(struct sockstat *s, const char *sock_name)
793 {
794 if (netid_width)
795 printf("%-*s ", netid_width, sock_name);
796 if (state_width)
797 printf("%-*s ", state_width, sstate_name[s->state]);
798
799 printf("%-6d %-6d ", s->rq, s->wq);
800 }
801
802 static void sock_details_print(struct sockstat *s)
803 {
804 if (s->uid)
805 printf(" uid:%u", s->uid);
806
807 printf(" ino:%u", s->ino);
808 printf(" sk:%llx", s->sk);
809 }
810
811 static void sock_addr_print_width(int addr_len, const char *addr, char *delim,
812 int port_len, const char *port, const char *ifname)
813 {
814 if (ifname) {
815 printf("%*s%%%s%s%-*s ", addr_len, addr, ifname, delim,
816 port_len, port);
817 }
818 else {
819 printf("%*s%s%-*s ", addr_len, addr, delim, port_len, port);
820 }
821 }
822
823 static void sock_addr_print(const char *addr, char *delim, const char *port,
824 const char *ifname)
825 {
826 sock_addr_print_width(addr_width, addr, delim, serv_width, port, ifname);
827 }
828
829 static const char *tmr_name[] = {
830 "off",
831 "on",
832 "keepalive",
833 "timewait",
834 "persist",
835 "unknown"
836 };
837
838 static const char *print_ms_timer(int timeout)
839 {
840 static char buf[64];
841 int secs, msecs, minutes;
842 if (timeout < 0)
843 timeout = 0;
844 secs = timeout/1000;
845 minutes = secs/60;
846 secs = secs%60;
847 msecs = timeout%1000;
848 buf[0] = 0;
849 if (minutes) {
850 msecs = 0;
851 snprintf(buf, sizeof(buf)-16, "%dmin", minutes);
852 if (minutes > 9)
853 secs = 0;
854 }
855 if (secs) {
856 if (secs > 9)
857 msecs = 0;
858 sprintf(buf+strlen(buf), "%d%s", secs, msecs ? "." : "sec");
859 }
860 if (msecs)
861 sprintf(buf+strlen(buf), "%03dms", msecs);
862 return buf;
863 }
864
865 struct scache {
866 struct scache *next;
867 int port;
868 char *name;
869 const char *proto;
870 };
871
872 struct scache *rlist;
873
874 static void init_service_resolver(void)
875 {
876 char buf[128];
877 FILE *fp = popen("/usr/sbin/rpcinfo -p 2>/dev/null", "r");
878 if (fp) {
879 fgets(buf, sizeof(buf), fp);
880 while (fgets(buf, sizeof(buf), fp) != NULL) {
881 unsigned int progn, port;
882 char proto[128], prog[128];
883 if (sscanf(buf, "%u %*d %s %u %s", &progn, proto,
884 &port, prog+4) == 4) {
885 struct scache *c = malloc(sizeof(*c));
886 if (c) {
887 c->port = port;
888 memcpy(prog, "rpc.", 4);
889 c->name = strdup(prog);
890 if (strcmp(proto, TCP_PROTO) == 0)
891 c->proto = TCP_PROTO;
892 else if (strcmp(proto, UDP_PROTO) == 0)
893 c->proto = UDP_PROTO;
894 else
895 c->proto = NULL;
896 c->next = rlist;
897 rlist = c;
898 }
899 }
900 }
901 pclose(fp);
902 }
903 }
904
905 static int ip_local_port_min, ip_local_port_max;
906
907 /* Even do not try default linux ephemeral port ranges:
908 * default /etc/services contains so much of useless crap
909 * wouldbe "allocated" to this area that resolution
910 * is really harmful. I shrug each time when seeing
911 * "socks" or "cfinger" in dumps.
912 */
913 static int is_ephemeral(int port)
914 {
915 if (!ip_local_port_min) {
916 FILE *f = ephemeral_ports_open();
917 if (f) {
918 fscanf(f, "%d %d",
919 &ip_local_port_min, &ip_local_port_max);
920 fclose(f);
921 } else {
922 ip_local_port_min = 1024;
923 ip_local_port_max = 4999;
924 }
925 }
926
927 return (port >= ip_local_port_min && port<= ip_local_port_max);
928 }
929
930
931 static const char *__resolve_service(int port)
932 {
933 struct scache *c;
934
935 for (c = rlist; c; c = c->next) {
936 if (c->port == port && c->proto == dg_proto)
937 return c->name;
938 }
939
940 if (!is_ephemeral(port)) {
941 static int notfirst;
942 struct servent *se;
943 if (!notfirst) {
944 setservent(1);
945 notfirst = 1;
946 }
947 se = getservbyport(htons(port), dg_proto);
948 if (se)
949 return se->s_name;
950 }
951
952 return NULL;
953 }
954
955 #define SCACHE_BUCKETS 1024
956 static struct scache *cache_htab[SCACHE_BUCKETS];
957
958 static const char *resolve_service(int port)
959 {
960 static char buf[128];
961 struct scache *c;
962 const char *res;
963 int hash;
964
965 if (port == 0) {
966 buf[0] = '*';
967 buf[1] = 0;
968 return buf;
969 }
970
971 if (!resolve_services)
972 goto do_numeric;
973
974 if (dg_proto == RAW_PROTO)
975 return inet_proto_n2a(port, buf, sizeof(buf));
976
977
978 hash = (port^(((unsigned long)dg_proto)>>2)) % SCACHE_BUCKETS;
979
980 for (c = cache_htab[hash]; c; c = c->next) {
981 if (c->port == port && c->proto == dg_proto)
982 goto do_cache;
983 }
984
985 c = malloc(sizeof(*c));
986 if (!c)
987 goto do_numeric;
988 res = __resolve_service(port);
989 c->port = port;
990 c->name = res ? strdup(res) : NULL;
991 c->proto = dg_proto;
992 c->next = cache_htab[hash];
993 cache_htab[hash] = c;
994
995 do_cache:
996 if (c->name)
997 return c->name;
998
999 do_numeric:
1000 sprintf(buf, "%u", port);
1001 return buf;
1002 }
1003
1004 static void inet_addr_print(const inet_prefix *a, int port, unsigned int ifindex)
1005 {
1006 char buf[1024];
1007 const char *ap = buf;
1008 int est_len = addr_width;
1009 const char *ifname = NULL;
1010
1011 if (a->family == AF_INET) {
1012 if (a->data[0] == 0) {
1013 buf[0] = '*';
1014 buf[1] = 0;
1015 } else {
1016 ap = format_host(AF_INET, 4, a->data, buf, sizeof(buf));
1017 }
1018 } else {
1019 ap = format_host(a->family, 16, a->data, buf, sizeof(buf));
1020 est_len = strlen(ap);
1021 if (est_len <= addr_width)
1022 est_len = addr_width;
1023 else
1024 est_len = addr_width + ((est_len-addr_width+3)/4)*4;
1025 }
1026
1027 if (ifindex) {
1028 ifname = ll_index_to_name(ifindex);
1029 est_len -= strlen(ifname) + 1; /* +1 for percent char */
1030 }
1031
1032 sock_addr_print_width(est_len, ap, ":", serv_width, resolve_service(port),
1033 ifname);
1034 }
1035
1036 struct aafilter
1037 {
1038 inet_prefix addr;
1039 int port;
1040 struct aafilter *next;
1041 };
1042
1043 static int inet2_addr_match(const inet_prefix *a, const inet_prefix *p,
1044 int plen)
1045 {
1046 if (!inet_addr_match(a, p, plen))
1047 return 0;
1048
1049 /* Cursed "v4 mapped" addresses: v4 mapped socket matches
1050 * pure IPv4 rule, but v4-mapped rule selects only v4-mapped
1051 * sockets. Fair? */
1052 if (p->family == AF_INET && a->family == AF_INET6) {
1053 if (a->data[0] == 0 && a->data[1] == 0 &&
1054 a->data[2] == htonl(0xffff)) {
1055 inet_prefix tmp = *a;
1056 tmp.data[0] = a->data[3];
1057 return inet_addr_match(&tmp, p, plen);
1058 }
1059 }
1060 return 1;
1061 }
1062
1063 static int unix_match(const inet_prefix *a, const inet_prefix *p)
1064 {
1065 char *addr = sock_addr_get_str(a);
1066 char *pattern = sock_addr_get_str(p);
1067
1068 if (pattern == NULL)
1069 return 1;
1070 if (addr == NULL)
1071 addr = "";
1072 return !fnmatch(pattern, addr, 0);
1073 }
1074
1075 static int run_ssfilter(struct ssfilter *f, struct sockstat *s)
1076 {
1077 switch (f->type) {
1078 case SSF_S_AUTO:
1079 {
1080 static int low, high=65535;
1081
1082 if (s->local.family == AF_UNIX) {
1083 char *p = sock_addr_get_str(&s->local);
1084 return p == NULL || (p[0] == '@' && strlen(p) == 6 &&
1085 strspn(p+1, "0123456789abcdef") == 5);
1086 }
1087 if (s->local.family == AF_PACKET)
1088 return s->lport == 0 && s->local.data[0] == 0;
1089 if (s->local.family == AF_NETLINK)
1090 return s->lport < 0;
1091
1092 if (!low) {
1093 FILE *fp = ephemeral_ports_open();
1094 if (fp) {
1095 fscanf(fp, "%d%d", &low, &high);
1096 fclose(fp);
1097 }
1098 }
1099 return s->lport >= low && s->lport <= high;
1100 }
1101 case SSF_DCOND:
1102 {
1103 struct aafilter *a = (void*)f->pred;
1104 if (a->addr.family == AF_UNIX)
1105 return unix_match(&s->remote, &a->addr);
1106 if (a->port != -1 && a->port != s->rport)
1107 return 0;
1108 if (a->addr.bitlen) {
1109 do {
1110 if (!inet2_addr_match(&s->remote, &a->addr, a->addr.bitlen))
1111 return 1;
1112 } while ((a = a->next) != NULL);
1113 return 0;
1114 }
1115 return 1;
1116 }
1117 case SSF_SCOND:
1118 {
1119 struct aafilter *a = (void*)f->pred;
1120 if (a->addr.family == AF_UNIX)
1121 return unix_match(&s->local, &a->addr);
1122 if (a->port != -1 && a->port != s->lport)
1123 return 0;
1124 if (a->addr.bitlen) {
1125 do {
1126 if (!inet2_addr_match(&s->local, &a->addr, a->addr.bitlen))
1127 return 1;
1128 } while ((a = a->next) != NULL);
1129 return 0;
1130 }
1131 return 1;
1132 }
1133 case SSF_D_GE:
1134 {
1135 struct aafilter *a = (void*)f->pred;
1136 return s->rport >= a->port;
1137 }
1138 case SSF_D_LE:
1139 {
1140 struct aafilter *a = (void*)f->pred;
1141 return s->rport <= a->port;
1142 }
1143 case SSF_S_GE:
1144 {
1145 struct aafilter *a = (void*)f->pred;
1146 return s->lport >= a->port;
1147 }
1148 case SSF_S_LE:
1149 {
1150 struct aafilter *a = (void*)f->pred;
1151 return s->lport <= a->port;
1152 }
1153
1154 /* Yup. It is recursion. Sorry. */
1155 case SSF_AND:
1156 return run_ssfilter(f->pred, s) && run_ssfilter(f->post, s);
1157 case SSF_OR:
1158 return run_ssfilter(f->pred, s) || run_ssfilter(f->post, s);
1159 case SSF_NOT:
1160 return !run_ssfilter(f->pred, s);
1161 default:
1162 abort();
1163 }
1164 }
1165
1166 /* Relocate external jumps by reloc. */
1167 static void ssfilter_patch(char *a, int len, int reloc)
1168 {
1169 while (len > 0) {
1170 struct inet_diag_bc_op *op = (struct inet_diag_bc_op*)a;
1171 if (op->no == len+4)
1172 op->no += reloc;
1173 len -= op->yes;
1174 a += op->yes;
1175 }
1176 if (len < 0)
1177 abort();
1178 }
1179
1180 static int ssfilter_bytecompile(struct ssfilter *f, char **bytecode)
1181 {
1182 switch (f->type) {
1183 case SSF_S_AUTO:
1184 {
1185 if (!(*bytecode=malloc(4))) abort();
1186 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_AUTO, 4, 8 };
1187 return 4;
1188 }
1189 case SSF_DCOND:
1190 case SSF_SCOND:
1191 {
1192 struct aafilter *a = (void*)f->pred;
1193 struct aafilter *b;
1194 char *ptr;
1195 int code = (f->type == SSF_DCOND ? INET_DIAG_BC_D_COND : INET_DIAG_BC_S_COND);
1196 int len = 0;
1197
1198 for (b=a; b; b=b->next) {
1199 len += 4 + sizeof(struct inet_diag_hostcond);
1200 if (a->addr.family == AF_INET6)
1201 len += 16;
1202 else
1203 len += 4;
1204 if (b->next)
1205 len += 4;
1206 }
1207 if (!(ptr = malloc(len))) abort();
1208 *bytecode = ptr;
1209 for (b=a; b; b=b->next) {
1210 struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)ptr;
1211 int alen = (a->addr.family == AF_INET6 ? 16 : 4);
1212 int oplen = alen + 4 + sizeof(struct inet_diag_hostcond);
1213 struct inet_diag_hostcond *cond = (struct inet_diag_hostcond*)(ptr+4);
1214
1215 *op = (struct inet_diag_bc_op){ code, oplen, oplen+4 };
1216 cond->family = a->addr.family;
1217 cond->port = a->port;
1218 cond->prefix_len = a->addr.bitlen;
1219 memcpy(cond->addr, a->addr.data, alen);
1220 ptr += oplen;
1221 if (b->next) {
1222 op = (struct inet_diag_bc_op *)ptr;
1223 *op = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, len - (ptr-*bytecode)};
1224 ptr += 4;
1225 }
1226 }
1227 return ptr - *bytecode;
1228 }
1229 case SSF_D_GE:
1230 {
1231 struct aafilter *x = (void*)f->pred;
1232 if (!(*bytecode=malloc(8))) abort();
1233 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_D_GE, 8, 12 };
1234 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
1235 return 8;
1236 }
1237 case SSF_D_LE:
1238 {
1239 struct aafilter *x = (void*)f->pred;
1240 if (!(*bytecode=malloc(8))) abort();
1241 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_D_LE, 8, 12 };
1242 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
1243 return 8;
1244 }
1245 case SSF_S_GE:
1246 {
1247 struct aafilter *x = (void*)f->pred;
1248 if (!(*bytecode=malloc(8))) abort();
1249 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_S_GE, 8, 12 };
1250 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
1251 return 8;
1252 }
1253 case SSF_S_LE:
1254 {
1255 struct aafilter *x = (void*)f->pred;
1256 if (!(*bytecode=malloc(8))) abort();
1257 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_S_LE, 8, 12 };
1258 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
1259 return 8;
1260 }
1261
1262 case SSF_AND:
1263 {
1264 char *a1, *a2, *a;
1265 int l1, l2;
1266 l1 = ssfilter_bytecompile(f->pred, &a1);
1267 l2 = ssfilter_bytecompile(f->post, &a2);
1268 if (!(a = malloc(l1+l2))) abort();
1269 memcpy(a, a1, l1);
1270 memcpy(a+l1, a2, l2);
1271 free(a1); free(a2);
1272 ssfilter_patch(a, l1, l2);
1273 *bytecode = a;
1274 return l1+l2;
1275 }
1276 case SSF_OR:
1277 {
1278 char *a1, *a2, *a;
1279 int l1, l2;
1280 l1 = ssfilter_bytecompile(f->pred, &a1);
1281 l2 = ssfilter_bytecompile(f->post, &a2);
1282 if (!(a = malloc(l1+l2+4))) abort();
1283 memcpy(a, a1, l1);
1284 memcpy(a+l1+4, a2, l2);
1285 free(a1); free(a2);
1286 *(struct inet_diag_bc_op*)(a+l1) = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, l2+4 };
1287 *bytecode = a;
1288 return l1+l2+4;
1289 }
1290 case SSF_NOT:
1291 {
1292 char *a1, *a;
1293 int l1;
1294 l1 = ssfilter_bytecompile(f->pred, &a1);
1295 if (!(a = malloc(l1+4))) abort();
1296 memcpy(a, a1, l1);
1297 free(a1);
1298 *(struct inet_diag_bc_op*)(a+l1) = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, 8 };
1299 *bytecode = a;
1300 return l1+4;
1301 }
1302 default:
1303 abort();
1304 }
1305 }
1306
1307 static int remember_he(struct aafilter *a, struct hostent *he)
1308 {
1309 char **ptr = he->h_addr_list;
1310 int cnt = 0;
1311 int len;
1312
1313 if (he->h_addrtype == AF_INET)
1314 len = 4;
1315 else if (he->h_addrtype == AF_INET6)
1316 len = 16;
1317 else
1318 return 0;
1319
1320 while (*ptr) {
1321 struct aafilter *b = a;
1322 if (a->addr.bitlen) {
1323 if ((b = malloc(sizeof(*b))) == NULL)
1324 return cnt;
1325 *b = *a;
1326 b->next = a->next;
1327 a->next = b;
1328 }
1329 memcpy(b->addr.data, *ptr, len);
1330 b->addr.bytelen = len;
1331 b->addr.bitlen = len*8;
1332 b->addr.family = he->h_addrtype;
1333 ptr++;
1334 cnt++;
1335 }
1336 return cnt;
1337 }
1338
1339 static int get_dns_host(struct aafilter *a, const char *addr, int fam)
1340 {
1341 static int notfirst;
1342 int cnt = 0;
1343 struct hostent *he;
1344
1345 a->addr.bitlen = 0;
1346 if (!notfirst) {
1347 sethostent(1);
1348 notfirst = 1;
1349 }
1350 he = gethostbyname2(addr, fam == AF_UNSPEC ? AF_INET : fam);
1351 if (he)
1352 cnt = remember_he(a, he);
1353 if (fam == AF_UNSPEC) {
1354 he = gethostbyname2(addr, AF_INET6);
1355 if (he)
1356 cnt += remember_he(a, he);
1357 }
1358 return !cnt;
1359 }
1360
1361 static int xll_initted = 0;
1362
1363 static void xll_init(void)
1364 {
1365 struct rtnl_handle rth;
1366 if (rtnl_open(&rth, 0) < 0)
1367 exit(1);
1368
1369 ll_init_map(&rth);
1370 rtnl_close(&rth);
1371 xll_initted = 1;
1372 }
1373
1374 static const char *xll_index_to_name(int index)
1375 {
1376 if (!xll_initted)
1377 xll_init();
1378 return ll_index_to_name(index);
1379 }
1380
1381 static int xll_name_to_index(const char *dev)
1382 {
1383 if (!xll_initted)
1384 xll_init();
1385 return ll_name_to_index(dev);
1386 }
1387
1388 void *parse_hostcond(char *addr, bool is_port)
1389 {
1390 char *port = NULL;
1391 struct aafilter a = { .port = -1 };
1392 struct aafilter *res;
1393 int fam = preferred_family;
1394 struct filter *f = &current_filter;
1395
1396 if (fam == AF_UNIX || strncmp(addr, "unix:", 5) == 0) {
1397 char *p;
1398 a.addr.family = AF_UNIX;
1399 if (strncmp(addr, "unix:", 5) == 0)
1400 addr+=5;
1401 p = strdup(addr);
1402 a.addr.bitlen = 8*strlen(p);
1403 sock_addr_set_str(&a.addr, &p);
1404 fam = AF_UNIX;
1405 goto out;
1406 }
1407
1408 if (fam == AF_PACKET || strncmp(addr, "link:", 5) == 0) {
1409 a.addr.family = AF_PACKET;
1410 a.addr.bitlen = 0;
1411 if (strncmp(addr, "link:", 5) == 0)
1412 addr+=5;
1413 port = strchr(addr, ':');
1414 if (port) {
1415 *port = 0;
1416 if (port[1] && strcmp(port+1, "*")) {
1417 if (get_integer(&a.port, port+1, 0)) {
1418 if ((a.port = xll_name_to_index(port+1)) <= 0)
1419 return NULL;
1420 }
1421 }
1422 }
1423 if (addr[0] && strcmp(addr, "*")) {
1424 unsigned short tmp;
1425 a.addr.bitlen = 32;
1426 if (ll_proto_a2n(&tmp, addr))
1427 return NULL;
1428 a.addr.data[0] = ntohs(tmp);
1429 }
1430 fam = AF_PACKET;
1431 goto out;
1432 }
1433
1434 if (fam == AF_NETLINK || strncmp(addr, "netlink:", 8) == 0) {
1435 a.addr.family = AF_NETLINK;
1436 a.addr.bitlen = 0;
1437 if (strncmp(addr, "netlink:", 8) == 0)
1438 addr+=8;
1439 port = strchr(addr, ':');
1440 if (port) {
1441 *port = 0;
1442 if (port[1] && strcmp(port+1, "*")) {
1443 if (get_integer(&a.port, port+1, 0)) {
1444 if (strcmp(port+1, "kernel") == 0)
1445 a.port = 0;
1446 else
1447 return NULL;
1448 }
1449 }
1450 }
1451 if (addr[0] && strcmp(addr, "*")) {
1452 a.addr.bitlen = 32;
1453 if (nl_proto_a2n(&a.addr.data[0], addr) == -1)
1454 return NULL;
1455 }
1456 fam = AF_NETLINK;
1457 goto out;
1458 }
1459
1460 if (fam == AF_INET || !strncmp(addr, "inet:", 5)) {
1461 fam = AF_INET;
1462 if (!strncmp(addr, "inet:", 5))
1463 addr += 5;
1464 } else if (fam == AF_INET6 || !strncmp(addr, "inet6:", 6)) {
1465 fam = AF_INET6;
1466 if (!strncmp(addr, "inet6:", 6))
1467 addr += 6;
1468 }
1469
1470 /* URL-like literal [] */
1471 if (addr[0] == '[') {
1472 addr++;
1473 if ((port = strchr(addr, ']')) == NULL)
1474 return NULL;
1475 *port++ = 0;
1476 } else if (addr[0] == '*') {
1477 port = addr+1;
1478 } else {
1479 port = strrchr(strchr(addr, '/') ? : addr, ':');
1480 }
1481
1482 if (is_port)
1483 port = addr;
1484
1485 if (port && *port) {
1486 if (*port == ':')
1487 *port++ = 0;
1488
1489 if (*port && *port != '*') {
1490 if (get_integer(&a.port, port, 0)) {
1491 struct servent *se1 = NULL;
1492 struct servent *se2 = NULL;
1493 if (current_filter.dbs&(1<<UDP_DB))
1494 se1 = getservbyname(port, UDP_PROTO);
1495 if (current_filter.dbs&(1<<TCP_DB))
1496 se2 = getservbyname(port, TCP_PROTO);
1497 if (se1 && se2 && se1->s_port != se2->s_port) {
1498 fprintf(stderr, "Error: ambiguous port \"%s\".\n", port);
1499 return NULL;
1500 }
1501 if (!se1)
1502 se1 = se2;
1503 if (se1) {
1504 a.port = ntohs(se1->s_port);
1505 } else {
1506 struct scache *s;
1507 for (s = rlist; s; s = s->next) {
1508 if ((s->proto == UDP_PROTO &&
1509 (current_filter.dbs&(1<<UDP_DB))) ||
1510 (s->proto == TCP_PROTO &&
1511 (current_filter.dbs&(1<<TCP_DB)))) {
1512 if (s->name && strcmp(s->name, port) == 0) {
1513 if (a.port > 0 && a.port != s->port) {
1514 fprintf(stderr, "Error: ambiguous port \"%s\".\n", port);
1515 return NULL;
1516 }
1517 a.port = s->port;
1518 }
1519 }
1520 }
1521 if (a.port <= 0) {
1522 fprintf(stderr, "Error: \"%s\" does not look like a port.\n", port);
1523 return NULL;
1524 }
1525 }
1526 }
1527 }
1528 }
1529 if (!is_port && addr && *addr && *addr != '*') {
1530 if (get_prefix_1(&a.addr, addr, fam)) {
1531 if (get_dns_host(&a, addr, fam)) {
1532 fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", addr);
1533 return NULL;
1534 }
1535 }
1536 }
1537
1538 out:
1539 if (fam != AF_UNSPEC) {
1540 f->families = 0;
1541 filter_af_set(f, fam);
1542 filter_states_set(f, 0);
1543 }
1544
1545 res = malloc(sizeof(*res));
1546 if (res)
1547 memcpy(res, &a, sizeof(a));
1548 return res;
1549 }
1550
1551 static char *proto_name(int protocol)
1552 {
1553 switch (protocol) {
1554 case IPPROTO_UDP:
1555 return "udp";
1556 case IPPROTO_TCP:
1557 return "tcp";
1558 case IPPROTO_DCCP:
1559 return "dccp";
1560 }
1561
1562 return "???";
1563 }
1564
1565 static void inet_stats_print(struct sockstat *s, int protocol)
1566 {
1567 char *buf = NULL;
1568
1569 sock_state_print(s, proto_name(protocol));
1570
1571 inet_addr_print(&s->local, s->lport, s->iface);
1572 inet_addr_print(&s->remote, s->rport, 0);
1573
1574 if (show_proc_ctx || show_sock_ctx) {
1575 if (find_entry(s->ino, &buf,
1576 (show_proc_ctx & show_sock_ctx) ?
1577 PROC_SOCK_CTX : PROC_CTX) > 0) {
1578 printf(" users:(%s)", buf);
1579 free(buf);
1580 }
1581 } else if (show_users) {
1582 if (find_entry(s->ino, &buf, USERS) > 0) {
1583 printf(" users:(%s)", buf);
1584 free(buf);
1585 }
1586 }
1587 }
1588
1589 static int proc_parse_inet_addr(char *loc, char *rem, int family, struct
1590 sockstat *s)
1591 {
1592 s->local.family = s->remote.family = family;
1593 if (family == AF_INET) {
1594 sscanf(loc, "%x:%x", s->local.data, (unsigned*)&s->lport);
1595 sscanf(rem, "%x:%x", s->remote.data, (unsigned*)&s->rport);
1596 s->local.bytelen = s->remote.bytelen = 4;
1597 return 0;
1598 } else {
1599 sscanf(loc, "%08x%08x%08x%08x:%x",
1600 s->local.data,
1601 s->local.data + 1,
1602 s->local.data + 2,
1603 s->local.data + 3,
1604 &s->lport);
1605 sscanf(rem, "%08x%08x%08x%08x:%x",
1606 s->remote.data,
1607 s->remote.data + 1,
1608 s->remote.data + 2,
1609 s->remote.data + 3,
1610 &s->rport);
1611 s->local.bytelen = s->remote.bytelen = 16;
1612 return 0;
1613 }
1614 return -1;
1615 }
1616
1617 static int proc_inet_split_line(char *line, char **loc, char **rem, char **data)
1618 {
1619 char *p;
1620
1621 if ((p = strchr(line, ':')) == NULL)
1622 return -1;
1623
1624 *loc = p+2;
1625 if ((p = strchr(*loc, ':')) == NULL)
1626 return -1;
1627
1628 p[5] = 0;
1629 *rem = p+6;
1630 if ((p = strchr(*rem, ':')) == NULL)
1631 return -1;
1632
1633 p[5] = 0;
1634 *data = p+6;
1635 return 0;
1636 }
1637
1638 static char *sprint_bw(char *buf, double bw)
1639 {
1640 if (bw > 1000000.)
1641 sprintf(buf,"%.1fM", bw / 1000000.);
1642 else if (bw > 1000.)
1643 sprintf(buf,"%.1fK", bw / 1000.);
1644 else
1645 sprintf(buf, "%g", bw);
1646
1647 return buf;
1648 }
1649
1650 static void tcp_stats_print(struct tcpstat *s)
1651 {
1652 char b1[64];
1653
1654 if (s->has_ts_opt)
1655 printf(" ts");
1656 if (s->has_sack_opt)
1657 printf(" sack");
1658 if (s->has_ecn_opt)
1659 printf(" ecn");
1660 if (s->has_ecnseen_opt)
1661 printf(" ecnseen");
1662 if (s->has_fastopen_opt)
1663 printf(" fastopen");
1664 if (s->cong_alg[0])
1665 printf(" %s", s->cong_alg);
1666 if (s->has_wscale_opt)
1667 printf(" wscale:%d,%d", s->snd_wscale, s->rcv_wscale);
1668 if (s->rto)
1669 printf(" rto:%g", s->rto);
1670 if (s->backoff)
1671 printf(" backoff:%u", s->backoff);
1672 if (s->rtt)
1673 printf(" rtt:%g/%g", s->rtt, s->rttvar);
1674 if (s->ato)
1675 printf(" ato:%g", s->ato);
1676
1677 if (s->qack)
1678 printf(" qack:%d", s->qack);
1679 if (s->qack & 1)
1680 printf(" bidir");
1681
1682 if (s->mss)
1683 printf(" mss:%d", s->mss);
1684 if (s->cwnd)
1685 printf(" cwnd:%d", s->cwnd);
1686 if (s->ssthresh)
1687 printf(" ssthresh:%d", s->ssthresh);
1688
1689 if (s->bytes_acked)
1690 printf(" bytes_acked:%llu", s->bytes_acked);
1691 if (s->bytes_received)
1692 printf(" bytes_received:%llu", s->bytes_received);
1693 if (s->segs_out)
1694 printf(" segs_out:%u", s->segs_out);
1695 if (s->segs_in)
1696 printf(" segs_in:%u", s->segs_in);
1697
1698 if (s->dctcp && s->dctcp->enabled) {
1699 struct dctcpstat *dctcp = s->dctcp;
1700
1701 printf(" dctcp:(ce_state:%u,alpha:%u,ab_ecn:%u,ab_tot:%u)",
1702 dctcp->ce_state, dctcp->alpha, dctcp->ab_ecn,
1703 dctcp->ab_tot);
1704 } else if (s->dctcp) {
1705 printf(" dctcp:fallback_mode");
1706 }
1707
1708 if (s->send_bps)
1709 printf(" send %sbps", sprint_bw(b1, s->send_bps));
1710 if (s->lastsnd)
1711 printf(" lastsnd:%u", s->lastsnd);
1712 if (s->lastrcv)
1713 printf(" lastrcv:%u", s->lastrcv);
1714 if (s->lastack)
1715 printf(" lastack:%u", s->lastack);
1716
1717 if (s->pacing_rate) {
1718 printf(" pacing_rate %sbps", sprint_bw(b1, s->pacing_rate));
1719 if (s->pacing_rate_max)
1720 printf("/%sbps", sprint_bw(b1,
1721 s->pacing_rate_max));
1722 }
1723
1724 if (s->unacked)
1725 printf(" unacked:%u", s->unacked);
1726 if (s->retrans || s->retrans_total)
1727 printf(" retrans:%u/%u", s->retrans, s->retrans_total);
1728 if (s->lost)
1729 printf(" lost:%u", s->lost);
1730 if (s->sacked && s->ss.state != SS_LISTEN)
1731 printf(" sacked:%u", s->sacked);
1732 if (s->fackets)
1733 printf(" fackets:%u", s->fackets);
1734 if (s->reordering != 3)
1735 printf(" reordering:%d", s->reordering);
1736 if (s->rcv_rtt)
1737 printf(" rcv_rtt:%g", s->rcv_rtt);
1738 if (s->rcv_space)
1739 printf(" rcv_space:%d", s->rcv_space);
1740 }
1741
1742 static void tcp_timer_print(struct tcpstat *s)
1743 {
1744 if (s->timer) {
1745 if (s->timer > 4)
1746 s->timer = 5;
1747 printf(" timer:(%s,%s,%d)",
1748 tmr_name[s->timer],
1749 print_ms_timer(s->timeout),
1750 s->retrans);
1751 }
1752 }
1753
1754 static int tcp_show_line(char *line, const struct filter *f, int family)
1755 {
1756 int rto = 0, ato = 0;
1757 struct tcpstat s = {};
1758 char *loc, *rem, *data;
1759 char opt[256];
1760 int n;
1761 int hz = get_user_hz();
1762
1763 if (proc_inet_split_line(line, &loc, &rem, &data))
1764 return -1;
1765
1766 int state = (data[1] >= 'A') ? (data[1] - 'A' + 10) : (data[1] - '0');
1767 if (!(f->states & (1 << state)))
1768 return 0;
1769
1770 proc_parse_inet_addr(loc, rem, family, &s.ss);
1771
1772 if (f->f && run_ssfilter(f->f, &s.ss) == 0)
1773 return 0;
1774
1775 opt[0] = 0;
1776 n = sscanf(data, "%x %x:%x %x:%x %x %d %d %u %d %llx %d %d %d %d %d %[^\n]\n",
1777 &s.ss.state, &s.ss.wq, &s.ss.rq,
1778 &s.timer, &s.timeout, &s.retrans, &s.ss.uid, &s.probes,
1779 &s.ss.ino, &s.ss.refcnt, &s.ss.sk, &rto, &ato, &s.qack, &s.cwnd,
1780 &s.ssthresh, opt);
1781
1782 if (n < 17)
1783 opt[0] = 0;
1784
1785 if (n < 12) {
1786 rto = 0;
1787 s.cwnd = 2;
1788 s.ssthresh = -1;
1789 ato = s.qack = 0;
1790 }
1791
1792 s.retrans = s.timer != 1 ? s.probes : s.retrans;
1793 s.timeout = (s.timeout * 1000 + hz - 1) / hz;
1794 s.ato = (double)ato / hz;
1795 s.qack /= 2;
1796 s.rto = (double)rto;
1797 s.ssthresh = s.ssthresh == -1 ? 0 : s.ssthresh;
1798 s.rto = s.rto != 3 * hz ? s.rto / hz : 0;
1799
1800 inet_stats_print(&s.ss, IPPROTO_TCP);
1801
1802 if (show_options)
1803 tcp_timer_print(&s);
1804
1805 if (show_details) {
1806 sock_details_print(&s.ss);
1807 if (opt[0])
1808 printf(" opt:\"%s\"", opt);
1809 }
1810
1811 if (show_tcpinfo)
1812 tcp_stats_print(&s);
1813
1814 printf("\n");
1815 return 0;
1816 }
1817
1818 static int generic_record_read(FILE *fp,
1819 int (*worker)(char*, const struct filter *, int),
1820 const struct filter *f, int fam)
1821 {
1822 char line[256];
1823
1824 /* skip header */
1825 if (fgets(line, sizeof(line), fp) == NULL)
1826 goto outerr;
1827
1828 while (fgets(line, sizeof(line), fp) != NULL) {
1829 int n = strlen(line);
1830 if (n == 0 || line[n-1] != '\n') {
1831 errno = -EINVAL;
1832 return -1;
1833 }
1834 line[n-1] = 0;
1835
1836 if (worker(line, f, fam) < 0)
1837 return 0;
1838 }
1839 outerr:
1840
1841 return ferror(fp) ? -1 : 0;
1842 }
1843
1844 static void print_skmeminfo(struct rtattr *tb[], int attrtype)
1845 {
1846 const __u32 *skmeminfo;
1847
1848 if (!tb[attrtype]) {
1849 if (attrtype == INET_DIAG_SKMEMINFO) {
1850 if (!tb[INET_DIAG_MEMINFO])
1851 return;
1852
1853 const struct inet_diag_meminfo *minfo =
1854 RTA_DATA(tb[INET_DIAG_MEMINFO]);
1855
1856 printf(" mem:(r%u,w%u,f%u,t%u)",
1857 minfo->idiag_rmem,
1858 minfo->idiag_wmem,
1859 minfo->idiag_fmem,
1860 minfo->idiag_tmem);
1861 }
1862 return;
1863 }
1864
1865 skmeminfo = RTA_DATA(tb[attrtype]);
1866
1867 printf(" skmem:(r%u,rb%u,t%u,tb%u,f%u,w%u,o%u",
1868 skmeminfo[SK_MEMINFO_RMEM_ALLOC],
1869 skmeminfo[SK_MEMINFO_RCVBUF],
1870 skmeminfo[SK_MEMINFO_WMEM_ALLOC],
1871 skmeminfo[SK_MEMINFO_SNDBUF],
1872 skmeminfo[SK_MEMINFO_FWD_ALLOC],
1873 skmeminfo[SK_MEMINFO_WMEM_QUEUED],
1874 skmeminfo[SK_MEMINFO_OPTMEM]);
1875
1876 if (RTA_PAYLOAD(tb[attrtype]) >=
1877 (SK_MEMINFO_BACKLOG + 1) * sizeof(__u32))
1878 printf(",bl%u", skmeminfo[SK_MEMINFO_BACKLOG]);
1879
1880 printf(")");
1881 }
1882
1883 #define TCPI_HAS_OPT(info, opt) !!(info->tcpi_options & (opt))
1884
1885 static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
1886 struct rtattr *tb[])
1887 {
1888 double rtt = 0;
1889 struct tcpstat s = {};
1890
1891 s.ss.state = r->idiag_state;
1892
1893 print_skmeminfo(tb, INET_DIAG_SKMEMINFO);
1894
1895 if (tb[INET_DIAG_INFO]) {
1896 struct tcp_info *info;
1897 int len = RTA_PAYLOAD(tb[INET_DIAG_INFO]);
1898
1899 /* workaround for older kernels with less fields */
1900 if (len < sizeof(*info)) {
1901 info = alloca(sizeof(*info));
1902 memcpy(info, RTA_DATA(tb[INET_DIAG_INFO]), len);
1903 memset((char *)info + len, 0, sizeof(*info) - len);
1904 } else
1905 info = RTA_DATA(tb[INET_DIAG_INFO]);
1906
1907 if (show_options) {
1908 s.has_ts_opt = TCPI_HAS_OPT(info, TCPI_OPT_TIMESTAMPS);
1909 s.has_sack_opt = TCPI_HAS_OPT(info, TCPI_OPT_SACK);
1910 s.has_ecn_opt = TCPI_HAS_OPT(info, TCPI_OPT_ECN);
1911 s.has_ecnseen_opt = TCPI_HAS_OPT(info, TCPI_OPT_ECN_SEEN);
1912 s.has_fastopen_opt = TCPI_HAS_OPT(info, TCPI_OPT_SYN_DATA);
1913 }
1914
1915 if (tb[INET_DIAG_CONG])
1916 strncpy(s.cong_alg,
1917 rta_getattr_str(tb[INET_DIAG_CONG]),
1918 sizeof(s.cong_alg) - 1);
1919
1920 if (TCPI_HAS_OPT(info, TCPI_OPT_WSCALE)) {
1921 s.has_wscale_opt = true;
1922 s.snd_wscale = info->tcpi_snd_wscale;
1923 s.rcv_wscale = info->tcpi_rcv_wscale;
1924 }
1925
1926 if (info->tcpi_rto && info->tcpi_rto != 3000000)
1927 s.rto = (double)info->tcpi_rto / 1000;
1928
1929 s.backoff = info->tcpi_backoff;
1930 s.rtt = (double)info->tcpi_rtt / 1000;
1931 s.rttvar = (double)info->tcpi_rttvar / 1000;
1932 s.ato = (double)info->tcpi_ato / 1000;
1933 s.mss = info->tcpi_snd_mss;
1934 s.rcv_space = info->tcpi_rcv_space;
1935 s.rcv_rtt = (double)info->tcpi_rcv_rtt / 1000;
1936 s.lastsnd = info->tcpi_last_data_sent;
1937 s.lastrcv = info->tcpi_last_data_recv;
1938 s.lastack = info->tcpi_last_ack_recv;
1939 s.unacked = info->tcpi_unacked;
1940 s.retrans = info->tcpi_retrans;
1941 s.retrans_total = info->tcpi_total_retrans;
1942 s.lost = info->tcpi_lost;
1943 s.sacked = info->tcpi_sacked;
1944 s.reordering = info->tcpi_reordering;
1945 s.rcv_space = info->tcpi_rcv_space;
1946 s.cwnd = info->tcpi_snd_cwnd;
1947
1948 if (info->tcpi_snd_ssthresh < 0xFFFF)
1949 s.ssthresh = info->tcpi_snd_ssthresh;
1950
1951 rtt = (double) info->tcpi_rtt;
1952 if (tb[INET_DIAG_VEGASINFO]) {
1953 const struct tcpvegas_info *vinfo
1954 = RTA_DATA(tb[INET_DIAG_VEGASINFO]);
1955
1956 if (vinfo->tcpv_enabled &&
1957 vinfo->tcpv_rtt && vinfo->tcpv_rtt != 0x7fffffff)
1958 rtt = vinfo->tcpv_rtt;
1959 }
1960
1961 if (tb[INET_DIAG_DCTCPINFO]) {
1962 struct dctcpstat *dctcp = malloc(sizeof(struct
1963 dctcpstat));
1964
1965 const struct tcp_dctcp_info *dinfo
1966 = RTA_DATA(tb[INET_DIAG_DCTCPINFO]);
1967
1968 dctcp->enabled = !!dinfo->dctcp_enabled;
1969 dctcp->ce_state = dinfo->dctcp_ce_state;
1970 dctcp->alpha = dinfo->dctcp_alpha;
1971 dctcp->ab_ecn = dinfo->dctcp_ab_ecn;
1972 dctcp->ab_tot = dinfo->dctcp_ab_tot;
1973 s.dctcp = dctcp;
1974 }
1975
1976 if (rtt > 0 && info->tcpi_snd_mss && info->tcpi_snd_cwnd) {
1977 s.send_bps = (double) info->tcpi_snd_cwnd *
1978 (double)info->tcpi_snd_mss * 8000000. / rtt;
1979 }
1980
1981 if (info->tcpi_pacing_rate &&
1982 info->tcpi_pacing_rate != ~0ULL) {
1983 s.pacing_rate = info->tcpi_pacing_rate * 8.;
1984
1985 if (info->tcpi_max_pacing_rate &&
1986 info->tcpi_max_pacing_rate != ~0ULL)
1987 s.pacing_rate_max = info->tcpi_max_pacing_rate * 8.;
1988 }
1989 s.bytes_acked = info->tcpi_bytes_acked;
1990 s.bytes_received = info->tcpi_bytes_received;
1991 s.segs_out = info->tcpi_segs_out;
1992 s.segs_in = info->tcpi_segs_in;
1993 tcp_stats_print(&s);
1994 if (s.dctcp)
1995 free(s.dctcp);
1996 }
1997 }
1998
1999 static int inet_show_sock(struct nlmsghdr *nlh, struct filter *f, int protocol)
2000 {
2001 struct rtattr * tb[INET_DIAG_MAX+1];
2002 struct inet_diag_msg *r = NLMSG_DATA(nlh);
2003 struct sockstat s = {};
2004
2005 parse_rtattr(tb, INET_DIAG_MAX, (struct rtattr*)(r+1),
2006 nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
2007
2008 s.state = r->idiag_state;
2009 s.local.family = s.remote.family = r->idiag_family;
2010 s.lport = ntohs(r->id.idiag_sport);
2011 s.rport = ntohs(r->id.idiag_dport);
2012 s.wq = r->idiag_wqueue;
2013 s.rq = r->idiag_rqueue;
2014 s.ino = r->idiag_inode;
2015 s.uid = r->idiag_uid;
2016 s.iface = r->id.idiag_if;
2017 s.sk = cookie_sk_get(&r->id.idiag_cookie[0]);
2018
2019 if (s.local.family == AF_INET) {
2020 s.local.bytelen = s.remote.bytelen = 4;
2021 } else {
2022 s.local.bytelen = s.remote.bytelen = 16;
2023 }
2024
2025 memcpy(s.local.data, r->id.idiag_src, s.local.bytelen);
2026 memcpy(s.remote.data, r->id.idiag_dst, s.local.bytelen);
2027
2028 if (f && f->f && run_ssfilter(f->f, &s) == 0)
2029 return 0;
2030
2031 inet_stats_print(&s, protocol);
2032
2033 if (show_options) {
2034 struct tcpstat t = {};
2035
2036 t.timer = r->idiag_timer;
2037 t.timeout = r->idiag_expires;
2038 t.retrans = r->idiag_retrans;
2039 tcp_timer_print(&t);
2040 }
2041
2042 if (show_details) {
2043 sock_details_print(&s);
2044 if (tb[INET_DIAG_SHUTDOWN]) {
2045 unsigned char mask;
2046 mask = *(__u8 *)RTA_DATA(tb[INET_DIAG_SHUTDOWN]);
2047 printf(" %c-%c", mask & 1 ? '-' : '<', mask & 2 ? '-' : '>');
2048 }
2049 }
2050
2051 if (show_mem || show_tcpinfo) {
2052 printf("\n\t");
2053 tcp_show_info(nlh, r, tb);
2054 }
2055
2056 printf("\n");
2057 return 0;
2058 }
2059
2060 static int tcpdiag_send(int fd, int protocol, struct filter *f)
2061 {
2062 struct sockaddr_nl nladdr;
2063 struct {
2064 struct nlmsghdr nlh;
2065 struct inet_diag_req r;
2066 } req;
2067 char *bc = NULL;
2068 int bclen;
2069 struct msghdr msg;
2070 struct rtattr rta;
2071 struct iovec iov[3];
2072
2073 if (protocol == IPPROTO_UDP)
2074 return -1;
2075
2076 memset(&nladdr, 0, sizeof(nladdr));
2077 nladdr.nl_family = AF_NETLINK;
2078
2079 req.nlh.nlmsg_len = sizeof(req);
2080 if (protocol == IPPROTO_TCP)
2081 req.nlh.nlmsg_type = TCPDIAG_GETSOCK;
2082 else
2083 req.nlh.nlmsg_type = DCCPDIAG_GETSOCK;
2084 req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST;
2085 req.nlh.nlmsg_pid = 0;
2086 req.nlh.nlmsg_seq = MAGIC_SEQ;
2087 memset(&req.r, 0, sizeof(req.r));
2088 req.r.idiag_family = AF_INET;
2089 req.r.idiag_states = f->states;
2090 if (show_mem) {
2091 req.r.idiag_ext |= (1<<(INET_DIAG_MEMINFO-1));
2092 req.r.idiag_ext |= (1<<(INET_DIAG_SKMEMINFO-1));
2093 }
2094
2095 if (show_tcpinfo) {
2096 req.r.idiag_ext |= (1<<(INET_DIAG_INFO-1));
2097 req.r.idiag_ext |= (1<<(INET_DIAG_VEGASINFO-1));
2098 req.r.idiag_ext |= (1<<(INET_DIAG_CONG-1));
2099 }
2100
2101 iov[0] = (struct iovec){
2102 .iov_base = &req,
2103 .iov_len = sizeof(req)
2104 };
2105 if (f->f) {
2106 bclen = ssfilter_bytecompile(f->f, &bc);
2107 rta.rta_type = INET_DIAG_REQ_BYTECODE;
2108 rta.rta_len = RTA_LENGTH(bclen);
2109 iov[1] = (struct iovec){ &rta, sizeof(rta) };
2110 iov[2] = (struct iovec){ bc, bclen };
2111 req.nlh.nlmsg_len += RTA_LENGTH(bclen);
2112 }
2113
2114 msg = (struct msghdr) {
2115 .msg_name = (void*)&nladdr,
2116 .msg_namelen = sizeof(nladdr),
2117 .msg_iov = iov,
2118 .msg_iovlen = f->f ? 3 : 1,
2119 };
2120
2121 if (sendmsg(fd, &msg, 0) < 0) {
2122 close(fd);
2123 return -1;
2124 }
2125
2126 return 0;
2127 }
2128
2129 static int sockdiag_send(int family, int fd, int protocol, struct filter *f)
2130 {
2131 struct sockaddr_nl nladdr;
2132 DIAG_REQUEST(req, struct inet_diag_req_v2 r);
2133 char *bc = NULL;
2134 int bclen;
2135 struct msghdr msg;
2136 struct rtattr rta;
2137 struct iovec iov[3];
2138
2139 if (family == PF_UNSPEC)
2140 return tcpdiag_send(fd, protocol, f);
2141
2142 memset(&nladdr, 0, sizeof(nladdr));
2143 nladdr.nl_family = AF_NETLINK;
2144
2145 memset(&req.r, 0, sizeof(req.r));
2146 req.r.sdiag_family = family;
2147 req.r.sdiag_protocol = protocol;
2148 req.r.idiag_states = f->states;
2149 if (show_mem) {
2150 req.r.idiag_ext |= (1<<(INET_DIAG_MEMINFO-1));
2151 req.r.idiag_ext |= (1<<(INET_DIAG_SKMEMINFO-1));
2152 }
2153
2154 if (show_tcpinfo) {
2155 req.r.idiag_ext |= (1<<(INET_DIAG_INFO-1));
2156 req.r.idiag_ext |= (1<<(INET_DIAG_VEGASINFO-1));
2157 req.r.idiag_ext |= (1<<(INET_DIAG_CONG-1));
2158 }
2159
2160 iov[0] = (struct iovec){
2161 .iov_base = &req,
2162 .iov_len = sizeof(req)
2163 };
2164 if (f->f) {
2165 bclen = ssfilter_bytecompile(f->f, &bc);
2166 rta.rta_type = INET_DIAG_REQ_BYTECODE;
2167 rta.rta_len = RTA_LENGTH(bclen);
2168 iov[1] = (struct iovec){ &rta, sizeof(rta) };
2169 iov[2] = (struct iovec){ bc, bclen };
2170 req.nlh.nlmsg_len += RTA_LENGTH(bclen);
2171 }
2172
2173 msg = (struct msghdr) {
2174 .msg_name = (void*)&nladdr,
2175 .msg_namelen = sizeof(nladdr),
2176 .msg_iov = iov,
2177 .msg_iovlen = f->f ? 3 : 1,
2178 };
2179
2180 if (sendmsg(fd, &msg, 0) < 0) {
2181 close(fd);
2182 return -1;
2183 }
2184
2185 return 0;
2186 }
2187
2188 struct inet_diag_arg {
2189 struct filter *f;
2190 int protocol;
2191 };
2192
2193 static int show_one_inet_sock(const struct sockaddr_nl *addr,
2194 struct nlmsghdr *h, void *arg)
2195 {
2196 int err;
2197 struct inet_diag_arg *diag_arg = arg;
2198 struct inet_diag_msg *r = NLMSG_DATA(h);
2199
2200 if (!(diag_arg->f->families & (1 << r->idiag_family)))
2201 return 0;
2202 if ((err = inet_show_sock(h, NULL, diag_arg->protocol)) < 0)
2203 return err;
2204
2205 return 0;
2206 }
2207
2208 static int inet_show_netlink(struct filter *f, FILE *dump_fp, int protocol)
2209 {
2210 int err = 0;
2211 struct rtnl_handle rth;
2212 int family = PF_INET;
2213 struct inet_diag_arg arg = { .f = f, .protocol = protocol };
2214
2215 if (rtnl_open_byproto(&rth, 0, NETLINK_SOCK_DIAG))
2216 return -1;
2217 rth.dump = MAGIC_SEQ;
2218 rth.dump_fp = dump_fp;
2219 if (preferred_family == PF_INET6)
2220 family = PF_INET6;
2221
2222 again:
2223 if ((err = sockdiag_send(family, rth.fd, protocol, f)))
2224 goto Exit;
2225
2226 if ((err = rtnl_dump_filter(&rth, show_one_inet_sock, &arg))) {
2227 if (family != PF_UNSPEC) {
2228 family = PF_UNSPEC;
2229 goto again;
2230 }
2231 goto Exit;
2232 }
2233 if (family == PF_INET && preferred_family != PF_INET) {
2234 family = PF_INET6;
2235 goto again;
2236 }
2237
2238 Exit:
2239 rtnl_close(&rth);
2240 return err;
2241 }
2242
2243 static int tcp_show_netlink_file(struct filter *f)
2244 {
2245 FILE *fp;
2246 char buf[16384];
2247
2248 if ((fp = fopen(getenv("TCPDIAG_FILE"), "r")) == NULL) {
2249 perror("fopen($TCPDIAG_FILE)");
2250 return -1;
2251 }
2252
2253 while (1) {
2254 int status, err;
2255 struct nlmsghdr *h = (struct nlmsghdr*)buf;
2256
2257 status = fread(buf, 1, sizeof(*h), fp);
2258 if (status < 0) {
2259 perror("Reading header from $TCPDIAG_FILE");
2260 return -1;
2261 }
2262 if (status != sizeof(*h)) {
2263 perror("Unexpected EOF reading $TCPDIAG_FILE");
2264 return -1;
2265 }
2266
2267 status = fread(h+1, 1, NLMSG_ALIGN(h->nlmsg_len-sizeof(*h)), fp);
2268
2269 if (status < 0) {
2270 perror("Reading $TCPDIAG_FILE");
2271 return -1;
2272 }
2273 if (status + sizeof(*h) < h->nlmsg_len) {
2274 perror("Unexpected EOF reading $TCPDIAG_FILE");
2275 return -1;
2276 }
2277
2278 /* The only legal exit point */
2279 if (h->nlmsg_type == NLMSG_DONE)
2280 return 0;
2281
2282 if (h->nlmsg_type == NLMSG_ERROR) {
2283 struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
2284 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
2285 fprintf(stderr, "ERROR truncated\n");
2286 } else {
2287 errno = -err->error;
2288 perror("TCPDIAG answered");
2289 }
2290 return -1;
2291 }
2292
2293 err = inet_show_sock(h, f, IPPROTO_TCP);
2294 if (err < 0)
2295 return err;
2296 }
2297 }
2298
2299 static int tcp_show(struct filter *f, int socktype)
2300 {
2301 FILE *fp = NULL;
2302 char *buf = NULL;
2303 int bufsize = 64*1024;
2304
2305 if (!filter_af_get(f, AF_INET) && !filter_af_get(f, AF_INET6))
2306 return 0;
2307
2308 dg_proto = TCP_PROTO;
2309
2310 if (getenv("TCPDIAG_FILE"))
2311 return tcp_show_netlink_file(f);
2312
2313 if (!getenv("PROC_NET_TCP") && !getenv("PROC_ROOT")
2314 && inet_show_netlink(f, NULL, socktype) == 0)
2315 return 0;
2316
2317 /* Sigh... We have to parse /proc/net/tcp... */
2318
2319
2320 /* Estimate amount of sockets and try to allocate
2321 * huge buffer to read all the table at one read.
2322 * Limit it by 16MB though. The assumption is: as soon as
2323 * kernel was able to hold information about N connections,
2324 * it is able to give us some memory for snapshot.
2325 */
2326 if (1) {
2327 get_slabstat(&slabstat);
2328
2329 int guess = slabstat.socks+slabstat.tcp_syns;
2330 if (f->states&(1<<SS_TIME_WAIT))
2331 guess += slabstat.tcp_tws;
2332 if (guess > (16*1024*1024)/128)
2333 guess = (16*1024*1024)/128;
2334 guess *= 128;
2335 if (guess > bufsize)
2336 bufsize = guess;
2337 }
2338 while (bufsize >= 64*1024) {
2339 if ((buf = malloc(bufsize)) != NULL)
2340 break;
2341 bufsize /= 2;
2342 }
2343 if (buf == NULL) {
2344 errno = ENOMEM;
2345 return -1;
2346 }
2347
2348 if (f->families & (1<<AF_INET)) {
2349 if ((fp = net_tcp_open()) == NULL)
2350 goto outerr;
2351
2352 setbuffer(fp, buf, bufsize);
2353 if (generic_record_read(fp, tcp_show_line, f, AF_INET))
2354 goto outerr;
2355 fclose(fp);
2356 }
2357
2358 if ((f->families & (1<<AF_INET6)) &&
2359 (fp = net_tcp6_open()) != NULL) {
2360 setbuffer(fp, buf, bufsize);
2361 if (generic_record_read(fp, tcp_show_line, f, AF_INET6))
2362 goto outerr;
2363 fclose(fp);
2364 }
2365
2366 free(buf);
2367 return 0;
2368
2369 outerr:
2370 do {
2371 int saved_errno = errno;
2372 if (buf)
2373 free(buf);
2374 if (fp)
2375 fclose(fp);
2376 errno = saved_errno;
2377 return -1;
2378 } while (0);
2379 }
2380
2381
2382 static int dgram_show_line(char *line, const struct filter *f, int family)
2383 {
2384 struct sockstat s = {};
2385 char *loc, *rem, *data;
2386 char opt[256];
2387 int n;
2388
2389 if (proc_inet_split_line(line, &loc, &rem, &data))
2390 return -1;
2391
2392 int state = (data[1] >= 'A') ? (data[1] - 'A' + 10) : (data[1] - '0');
2393 if (!(f->states & (1 << state)))
2394 return 0;
2395
2396 proc_parse_inet_addr(loc, rem, family, &s);
2397
2398 if (f->f && run_ssfilter(f->f, &s) == 0)
2399 return 0;
2400
2401 opt[0] = 0;
2402 n = sscanf(data, "%x %x:%x %*x:%*x %*x %d %*d %u %d %llx %[^\n]\n",
2403 &s.state, &s.wq, &s.rq,
2404 &s.uid, &s.ino,
2405 &s.refcnt, &s.sk, opt);
2406
2407 if (n < 9)
2408 opt[0] = 0;
2409
2410 inet_stats_print(&s, IPPROTO_UDP);
2411
2412 if (show_details && opt[0])
2413 printf(" opt:\"%s\"", opt);
2414
2415 printf("\n");
2416 return 0;
2417 }
2418
2419 static int udp_show(struct filter *f)
2420 {
2421 FILE *fp = NULL;
2422
2423 if (!filter_af_get(f, AF_INET) && !filter_af_get(f, AF_INET6))
2424 return 0;
2425
2426 dg_proto = UDP_PROTO;
2427
2428 if (!getenv("PROC_NET_UDP") && !getenv("PROC_ROOT")
2429 && inet_show_netlink(f, NULL, IPPROTO_UDP) == 0)
2430 return 0;
2431
2432 if (f->families&(1<<AF_INET)) {
2433 if ((fp = net_udp_open()) == NULL)
2434 goto outerr;
2435 if (generic_record_read(fp, dgram_show_line, f, AF_INET))
2436 goto outerr;
2437 fclose(fp);
2438 }
2439
2440 if ((f->families&(1<<AF_INET6)) &&
2441 (fp = net_udp6_open()) != NULL) {
2442 if (generic_record_read(fp, dgram_show_line, f, AF_INET6))
2443 goto outerr;
2444 fclose(fp);
2445 }
2446 return 0;
2447
2448 outerr:
2449 do {
2450 int saved_errno = errno;
2451 if (fp)
2452 fclose(fp);
2453 errno = saved_errno;
2454 return -1;
2455 } while (0);
2456 }
2457
2458 static int raw_show(struct filter *f)
2459 {
2460 FILE *fp = NULL;
2461
2462 if (!filter_af_get(f, AF_INET) && !filter_af_get(f, AF_INET6))
2463 return 0;
2464
2465 dg_proto = RAW_PROTO;
2466
2467 if (f->families&(1<<AF_INET)) {
2468 if ((fp = net_raw_open()) == NULL)
2469 goto outerr;
2470 if (generic_record_read(fp, dgram_show_line, f, AF_INET))
2471 goto outerr;
2472 fclose(fp);
2473 }
2474
2475 if ((f->families&(1<<AF_INET6)) &&
2476 (fp = net_raw6_open()) != NULL) {
2477 if (generic_record_read(fp, dgram_show_line, f, AF_INET6))
2478 goto outerr;
2479 fclose(fp);
2480 }
2481 return 0;
2482
2483 outerr:
2484 do {
2485 int saved_errno = errno;
2486 if (fp)
2487 fclose(fp);
2488 errno = saved_errno;
2489 return -1;
2490 } while (0);
2491 }
2492
2493 int unix_state_map[] = { SS_CLOSE, SS_SYN_SENT,
2494 SS_ESTABLISHED, SS_CLOSING };
2495
2496 #define MAX_UNIX_REMEMBER (1024*1024/sizeof(struct sockstat))
2497
2498 static void unix_list_free(struct sockstat *list)
2499 {
2500 while (list) {
2501 struct sockstat *s = list;
2502 char *name = sock_addr_get_str(&s->local);
2503
2504 list = list->next;
2505
2506 if (name)
2507 free(name);
2508 free(s);
2509 }
2510 }
2511
2512 static const char *unix_netid_name(int type)
2513 {
2514 const char *netid;
2515
2516 switch (type) {
2517 case SOCK_STREAM:
2518 netid = "u_str";
2519 break;
2520 case SOCK_SEQPACKET:
2521 netid = "u_seq";
2522 break;
2523 case SOCK_DGRAM:
2524 default:
2525 netid = "u_dgr";
2526 break;
2527 }
2528 return netid;
2529 }
2530
2531 static bool unix_type_skip(struct sockstat *s, struct filter *f)
2532 {
2533 if (s->type == SOCK_STREAM && !(f->dbs&(1<<UNIX_ST_DB)))
2534 return true;
2535 if (s->type == SOCK_DGRAM && !(f->dbs&(1<<UNIX_DG_DB)))
2536 return true;
2537 if (s->type == SOCK_SEQPACKET && !(f->dbs&(1<<UNIX_SQ_DB)))
2538 return true;
2539 return false;
2540 }
2541
2542 static bool unix_use_proc(void)
2543 {
2544 return getenv("PROC_NET_UNIX") || getenv("PROC_ROOT");
2545 }
2546
2547 static void unix_stats_print(struct sockstat *list, struct filter *f)
2548 {
2549 struct sockstat *s;
2550 char *local, *peer;
2551 char *ctx_buf = NULL;
2552 bool use_proc = unix_use_proc();
2553 char port_name[30] = {};
2554
2555 for (s = list; s; s = s->next) {
2556 if (!(f->states & (1 << s->state)))
2557 continue;
2558 if (unix_type_skip(s, f))
2559 continue;
2560
2561 local = sock_addr_get_str(&s->local);
2562 peer = "*";
2563
2564 if (s->rport && use_proc) {
2565 struct sockstat *p;
2566
2567 for (p = list; p; p = p->next) {
2568 if (s->rport == p->lport)
2569 break;
2570 }
2571
2572 if (!p) {
2573 peer = "?";
2574 } else {
2575 peer = sock_addr_get_str(&p->local);
2576 peer = peer ? : "*";
2577 }
2578 }
2579
2580 if (use_proc && f->f) {
2581 if (strcmp(peer, "*") == 0)
2582 memset(s->remote.data, 0, sizeof(char *));
2583 else
2584 sock_addr_set_str(&s->remote, &peer);
2585
2586 if (run_ssfilter(f->f, s) == 0)
2587 continue;
2588 }
2589
2590 sock_state_print(s, unix_netid_name(s->type));
2591
2592 sock_addr_print(local ?: "*", " ",
2593 int_to_str(s->lport, port_name), NULL);
2594 sock_addr_print(peer, " ", int_to_str(s->rport, port_name),
2595 NULL);
2596
2597 if (show_proc_ctx || show_sock_ctx) {
2598 if (find_entry(s->ino, &ctx_buf,
2599 (show_proc_ctx & show_sock_ctx) ?
2600 PROC_SOCK_CTX : PROC_CTX) > 0) {
2601 printf(" users:(%s)", ctx_buf);
2602 free(ctx_buf);
2603 }
2604 } else if (show_users) {
2605 if (find_entry(s->ino, &ctx_buf, USERS) > 0) {
2606 printf(" users:(%s)", ctx_buf);
2607 free(ctx_buf);
2608 }
2609 }
2610 printf("\n");
2611 }
2612 }
2613
2614 static int unix_show_sock(const struct sockaddr_nl *addr, struct nlmsghdr *nlh,
2615 void *arg)
2616 {
2617 struct filter *f = (struct filter *)arg;
2618 struct unix_diag_msg *r = NLMSG_DATA(nlh);
2619 struct rtattr *tb[UNIX_DIAG_MAX+1];
2620 char *name = NULL;
2621 struct sockstat stat = {};
2622
2623 parse_rtattr(tb, UNIX_DIAG_MAX, (struct rtattr*)(r+1),
2624 nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
2625
2626 stat.type = r->udiag_type;
2627 stat.state = r->udiag_state;
2628 stat.ino = stat.lport = r->udiag_ino;
2629 stat.local.family = stat.remote.family = AF_UNIX;
2630
2631 if (unix_type_skip(&stat, f))
2632 return 0;
2633
2634 if (tb[UNIX_DIAG_RQLEN]) {
2635 struct unix_diag_rqlen *rql = RTA_DATA(tb[UNIX_DIAG_RQLEN]);
2636 stat.rq = rql->udiag_rqueue;
2637 stat.wq = rql->udiag_wqueue;
2638 }
2639 if (tb[UNIX_DIAG_NAME]) {
2640 int len = RTA_PAYLOAD(tb[UNIX_DIAG_NAME]);
2641
2642 name = malloc(len + 1);
2643 memcpy(name, RTA_DATA(tb[UNIX_DIAG_NAME]), len);
2644 name[len] = '\0';
2645 if (name[0] == '\0')
2646 name[0] = '@';
2647 sock_addr_set_str(&stat.local, &name);
2648 }
2649 if (tb[UNIX_DIAG_PEER])
2650 stat.rport = rta_getattr_u32(tb[UNIX_DIAG_PEER]);
2651
2652 if (f->f && run_ssfilter(f->f, &stat) == 0)
2653 return 0;
2654
2655 unix_stats_print(&stat, f);
2656
2657 if (show_mem) {
2658 printf("\t");
2659 print_skmeminfo(tb, UNIX_DIAG_MEMINFO);
2660 }
2661 if (show_details) {
2662 if (tb[UNIX_DIAG_SHUTDOWN]) {
2663 unsigned char mask;
2664 mask = *(__u8 *)RTA_DATA(tb[UNIX_DIAG_SHUTDOWN]);
2665 printf(" %c-%c", mask & 1 ? '-' : '<', mask & 2 ? '-' : '>');
2666 }
2667 }
2668 if (show_mem || show_details)
2669 printf("\n");
2670
2671 if (name)
2672 free(name);
2673 return 0;
2674 }
2675
2676 static int handle_netlink_request(struct filter *f, struct nlmsghdr *req,
2677 size_t size, rtnl_filter_t show_one_sock)
2678 {
2679 int ret = -1;
2680 struct rtnl_handle rth;
2681
2682 if (rtnl_open_byproto(&rth, 0, NETLINK_SOCK_DIAG))
2683 return -1;
2684
2685 rth.dump = MAGIC_SEQ;
2686
2687 if (rtnl_send(&rth, req, size) < 0)
2688 goto Exit;
2689
2690 if (rtnl_dump_filter(&rth, show_one_sock, f))
2691 goto Exit;
2692
2693 ret = 0;
2694 Exit:
2695 rtnl_close(&rth);
2696 return ret;
2697 }
2698
2699 static int unix_show_netlink(struct filter *f)
2700 {
2701 DIAG_REQUEST(req, struct unix_diag_req r);
2702
2703 req.r.sdiag_family = AF_UNIX;
2704 req.r.udiag_states = f->states;
2705 req.r.udiag_show = UDIAG_SHOW_NAME | UDIAG_SHOW_PEER | UDIAG_SHOW_RQLEN;
2706 if (show_mem)
2707 req.r.udiag_show |= UDIAG_SHOW_MEMINFO;
2708
2709 return handle_netlink_request(f, &req.nlh, sizeof(req), unix_show_sock);
2710 }
2711
2712 static int unix_show(struct filter *f)
2713 {
2714 FILE *fp;
2715 char buf[256];
2716 char name[128];
2717 int newformat = 0;
2718 int cnt;
2719 struct sockstat *list = NULL;
2720
2721 if (!filter_af_get(f, AF_UNIX))
2722 return 0;
2723
2724 if (!unix_use_proc() && unix_show_netlink(f) == 0)
2725 return 0;
2726
2727 if ((fp = net_unix_open()) == NULL)
2728 return -1;
2729 fgets(buf, sizeof(buf)-1, fp);
2730
2731 if (memcmp(buf, "Peer", 4) == 0)
2732 newformat = 1;
2733 cnt = 0;
2734
2735 while (fgets(buf, sizeof(buf)-1, fp)) {
2736 struct sockstat *u, **insp;
2737 int flags;
2738
2739 if (!(u = malloc(sizeof(*u))))
2740 break;
2741
2742 if (sscanf(buf, "%x: %x %x %x %x %x %d %s",
2743 &u->rport, &u->rq, &u->wq, &flags, &u->type,
2744 &u->state, &u->ino, name) < 8)
2745 name[0] = 0;
2746
2747 u->lport = u->ino;
2748 u->local.family = u->remote.family = AF_UNIX;
2749
2750 if (flags & (1 << 16)) {
2751 u->state = SS_LISTEN;
2752 } else {
2753 u->state = unix_state_map[u->state-1];
2754 if (u->type == SOCK_DGRAM && u->state == SS_CLOSE && u->rport)
2755 u->state = SS_ESTABLISHED;
2756 }
2757
2758 if (!newformat) {
2759 u->rport = 0;
2760 u->rq = 0;
2761 u->wq = 0;
2762 }
2763
2764 insp = &list;
2765 while (*insp) {
2766 if (u->type < (*insp)->type ||
2767 (u->type == (*insp)->type &&
2768 u->ino < (*insp)->ino))
2769 break;
2770 insp = &(*insp)->next;
2771 }
2772 u->next = *insp;
2773 *insp = u;
2774
2775 if (name[0]) {
2776 char *tmp = strdup(name);
2777 sock_addr_set_str(&u->local, &tmp);
2778 }
2779 if (++cnt > MAX_UNIX_REMEMBER) {
2780 unix_stats_print(list, f);
2781 unix_list_free(list);
2782 list = NULL;
2783 cnt = 0;
2784 }
2785 }
2786 fclose(fp);
2787 if (list) {
2788 unix_stats_print(list, f);
2789 unix_list_free(list);
2790 list = NULL;
2791 cnt = 0;
2792 }
2793
2794 return 0;
2795 }
2796
2797 static int packet_stats_print(struct sockstat *s, const struct filter *f)
2798 {
2799 char *buf = NULL;
2800 const char *addr, *port;
2801 char ll_name[16];
2802
2803 if (f->f) {
2804 s->local.family = AF_PACKET;
2805 s->remote.family = AF_PACKET;
2806 s->local.data[0] = s->prot;
2807 if (run_ssfilter(f->f, s) == 0)
2808 return 1;
2809 }
2810
2811 sock_state_print(s, s->type == SOCK_RAW ? "p_raw" : "p_dgr");
2812
2813 if (s->prot == 3)
2814 addr = "*";
2815 else
2816 addr = ll_proto_n2a(htons(s->prot), ll_name, sizeof(ll_name));
2817
2818 if (s->iface == 0)
2819 port = "*";
2820 else
2821 port = xll_index_to_name(s->iface);
2822
2823 sock_addr_print(addr, ":", port, NULL);
2824 sock_addr_print("", "*", "", NULL);
2825
2826 if (show_proc_ctx || show_sock_ctx) {
2827 if (find_entry(s->ino, &buf,
2828 (show_proc_ctx & show_sock_ctx) ?
2829 PROC_SOCK_CTX : PROC_CTX) > 0) {
2830 printf(" users:(%s)", buf);
2831 free(buf);
2832 }
2833 } else if (show_users) {
2834 if (find_entry(s->ino, &buf, USERS) > 0) {
2835 printf(" users:(%s)", buf);
2836 free(buf);
2837 }
2838 }
2839
2840 if (show_details)
2841 sock_details_print(s);
2842
2843 return 0;
2844 }
2845
2846 static void packet_show_ring(struct packet_diag_ring *ring)
2847 {
2848 printf("blk_size:%d", ring->pdr_block_size);
2849 printf(",blk_nr:%d", ring->pdr_block_nr);
2850 printf(",frm_size:%d", ring->pdr_frame_size);
2851 printf(",frm_nr:%d", ring->pdr_frame_nr);
2852 printf(",tmo:%d", ring->pdr_retire_tmo);
2853 printf(",features:0x%x", ring->pdr_features);
2854 }
2855
2856 static int packet_show_sock(const struct sockaddr_nl *addr,
2857 struct nlmsghdr *nlh, void *arg)
2858 {
2859 const struct filter *f = arg;
2860 struct packet_diag_msg *r = NLMSG_DATA(nlh);
2861 struct packet_diag_info *pinfo = NULL;
2862 struct packet_diag_ring *ring_rx = NULL, *ring_tx = NULL;
2863 struct rtattr *tb[PACKET_DIAG_MAX+1];
2864 struct sockstat stat = {};
2865 uint32_t fanout = 0;
2866 bool has_fanout = false;
2867
2868 parse_rtattr(tb, PACKET_DIAG_MAX, (struct rtattr*)(r+1),
2869 nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
2870
2871 /* use /proc/net/packet if all info are not available */
2872 if (!tb[PACKET_DIAG_MEMINFO])
2873 return -1;
2874
2875 stat.type = r->pdiag_type;
2876 stat.prot = r->pdiag_num;
2877 stat.ino = r->pdiag_ino;
2878 stat.state = SS_CLOSE;
2879 stat.sk = cookie_sk_get(&r->pdiag_cookie[0]);
2880
2881 if (tb[PACKET_DIAG_MEMINFO]) {
2882 __u32 *skmeminfo = RTA_DATA(tb[PACKET_DIAG_MEMINFO]);
2883 stat.rq = skmeminfo[SK_MEMINFO_RMEM_ALLOC];
2884 }
2885
2886 if (tb[PACKET_DIAG_INFO]) {
2887 pinfo = RTA_DATA(tb[PACKET_DIAG_INFO]);
2888 stat.lport = stat.iface = pinfo->pdi_index;
2889 }
2890
2891 if (tb[PACKET_DIAG_UID])
2892 stat.uid = *(__u32 *)RTA_DATA(tb[PACKET_DIAG_UID]);
2893
2894 if (tb[PACKET_DIAG_RX_RING])
2895 ring_rx = RTA_DATA(tb[PACKET_DIAG_RX_RING]);
2896
2897 if (tb[PACKET_DIAG_TX_RING])
2898 ring_tx = RTA_DATA(tb[PACKET_DIAG_TX_RING]);
2899
2900 if (tb[PACKET_DIAG_FANOUT]) {
2901 has_fanout = true;
2902 fanout = *(uint32_t *)RTA_DATA(tb[PACKET_DIAG_FANOUT]);
2903 }
2904
2905 if (packet_stats_print(&stat, f))
2906 return 0;
2907
2908 if (show_details) {
2909 if (pinfo) {
2910 printf("\n\tver:%d", pinfo->pdi_version);
2911 printf(" cpy_thresh:%d", pinfo->pdi_copy_thresh);
2912 printf(" flags( ");
2913 if (pinfo->pdi_flags & PDI_RUNNING)
2914 printf("running");
2915 if (pinfo->pdi_flags & PDI_AUXDATA)
2916 printf(" auxdata");
2917 if (pinfo->pdi_flags & PDI_ORIGDEV)
2918 printf(" origdev");
2919 if (pinfo->pdi_flags & PDI_VNETHDR)
2920 printf(" vnethdr");
2921 if (pinfo->pdi_flags & PDI_LOSS)
2922 printf(" loss");
2923 if (!pinfo->pdi_flags)
2924 printf("0");
2925 printf(" )");
2926 }
2927 if (ring_rx) {
2928 printf("\n\tring_rx(");
2929 packet_show_ring(ring_rx);
2930 printf(")");
2931 }
2932 if (ring_tx) {
2933 printf("\n\tring_tx(");
2934 packet_show_ring(ring_tx);
2935 printf(")");
2936 }
2937 if (has_fanout) {
2938 uint16_t type = (fanout >> 16) & 0xffff;
2939
2940 printf("\n\tfanout(");
2941 printf("id:%d,", fanout & 0xffff);
2942 printf("type:");
2943
2944 if (type == 0)
2945 printf("hash");
2946 else if (type == 1)
2947 printf("lb");
2948 else if (type == 2)
2949 printf("cpu");
2950 else if (type == 3)
2951 printf("roll");
2952 else if (type == 4)
2953 printf("random");
2954 else if (type == 5)
2955 printf("qm");
2956 else
2957 printf("0x%x", type);
2958
2959 printf(")");
2960 }
2961 }
2962
2963 if (show_bpf && tb[PACKET_DIAG_FILTER]) {
2964 struct sock_filter *fil =
2965 RTA_DATA(tb[PACKET_DIAG_FILTER]);
2966 int num = RTA_PAYLOAD(tb[PACKET_DIAG_FILTER]) /
2967 sizeof(struct sock_filter);
2968
2969 printf("\n\tbpf filter (%d): ", num);
2970 while (num) {
2971 printf(" 0x%02x %u %u %u,",
2972 fil->code, fil->jt, fil->jf, fil->k);
2973 num--;
2974 fil++;
2975 }
2976 }
2977 printf("\n");
2978 return 0;
2979 }
2980
2981 static int packet_show_netlink(struct filter *f)
2982 {
2983 DIAG_REQUEST(req, struct packet_diag_req r);
2984
2985 req.r.sdiag_family = AF_PACKET;
2986 req.r.pdiag_show = PACKET_SHOW_INFO | PACKET_SHOW_MEMINFO |
2987 PACKET_SHOW_FILTER | PACKET_SHOW_RING_CFG | PACKET_SHOW_FANOUT;
2988
2989 return handle_netlink_request(f, &req.nlh, sizeof(req), packet_show_sock);
2990 }
2991
2992 static int packet_show_line(char *buf, const struct filter *f, int fam)
2993 {
2994 unsigned long long sk;
2995 struct sockstat stat = {};
2996 int type, prot, iface, state, rq, uid, ino;
2997
2998 sscanf(buf, "%llx %*d %d %x %d %d %u %u %u",
2999 &sk,
3000 &type, &prot, &iface, &state,
3001 &rq, &uid, &ino);
3002
3003 if (stat.type == SOCK_RAW && !(f->dbs&(1<<PACKET_R_DB)))
3004 return 0;
3005 if (stat.type == SOCK_DGRAM && !(f->dbs&(1<<PACKET_DG_DB)))
3006 return 0;
3007
3008 stat.type = type;
3009 stat.prot = prot;
3010 stat.lport = stat.iface = iface;
3011 stat.state = state;
3012 stat.rq = rq;
3013 stat.uid = uid;
3014 stat.ino = ino;
3015 stat.state = SS_CLOSE;
3016
3017 if (packet_stats_print(&stat, f))
3018 return 0;
3019
3020 printf("\n");
3021 return 0;
3022 }
3023
3024 static int packet_show(struct filter *f)
3025 {
3026 FILE *fp;
3027
3028 if (!filter_af_get(f, AF_PACKET) || !(f->states & (1 << SS_CLOSE)))
3029 return 0;
3030
3031 if (!getenv("PROC_NET_PACKET") && !getenv("PROC_ROOT") &&
3032 packet_show_netlink(f) == 0)
3033 return 0;
3034
3035 if ((fp = net_packet_open()) == NULL)
3036 return -1;
3037 if (generic_record_read(fp, packet_show_line, f, AF_PACKET))
3038 return -1;
3039
3040 return 0;
3041 }
3042
3043 static int netlink_show_one(struct filter *f,
3044 int prot, int pid, unsigned groups,
3045 int state, int dst_pid, unsigned dst_group,
3046 int rq, int wq,
3047 unsigned long long sk, unsigned long long cb)
3048 {
3049 struct sockstat st;
3050 SPRINT_BUF(prot_buf) = {};
3051 const char *prot_name;
3052 char procname[64] = {};
3053
3054 st.state = SS_CLOSE;
3055 st.rq = rq;
3056 st.wq = wq;
3057
3058 if (f->f) {
3059 st.local.family = AF_NETLINK;
3060 st.remote.family = AF_NETLINK;
3061 st.rport = -1;
3062 st.lport = pid;
3063 st.local.data[0] = prot;
3064 if (run_ssfilter(f->f, &st) == 0)
3065 return 1;
3066 }
3067
3068 sock_state_print(&st, "nl");
3069
3070 if (resolve_services)
3071 prot_name = nl_proto_n2a(prot, prot_buf, sizeof(prot_buf));
3072 else
3073 prot_name = int_to_str(prot, prot_buf);
3074
3075 if (pid == -1) {
3076 procname[0] = '*';
3077 } else if (resolve_services) {
3078 int done = 0;
3079 if (!pid) {
3080 done = 1;
3081 strncpy(procname, "kernel", 6);
3082 } else if (pid > 0) {
3083 FILE *fp;
3084 sprintf(procname, "%s/%d/stat",
3085 getenv("PROC_ROOT") ? : "/proc", pid);
3086 if ((fp = fopen(procname, "r")) != NULL) {
3087 if (fscanf(fp, "%*d (%[^)])", procname) == 1) {
3088 sprintf(procname+strlen(procname), "/%d", pid);
3089 done = 1;
3090 }
3091 fclose(fp);
3092 }
3093 }
3094 if (!done)
3095 int_to_str(pid, procname);
3096 } else {
3097 int_to_str(pid, procname);
3098 }
3099
3100 sock_addr_print(prot_name, ":", procname, NULL);
3101
3102 if (state == NETLINK_CONNECTED) {
3103 char dst_group_buf[30];
3104 char dst_pid_buf[30];
3105 sock_addr_print(int_to_str(dst_group, dst_group_buf), ":",
3106 int_to_str(dst_pid, dst_pid_buf), NULL);
3107 } else {
3108 sock_addr_print("", "*", "", NULL);
3109 }
3110
3111 char *pid_context = NULL;
3112 if (show_proc_ctx) {
3113 /* The pid value will either be:
3114 * 0 if destination kernel - show kernel initial context.
3115 * A valid process pid - use getpidcon.
3116 * A unique value allocated by the kernel or netlink user
3117 * to the process - show context as "not available".
3118 */
3119 if (!pid)
3120 security_get_initial_context("kernel", &pid_context);
3121 else if (pid > 0)
3122 getpidcon(pid, &pid_context);
3123
3124 if (pid_context != NULL) {
3125 printf("proc_ctx=%-*s ", serv_width, pid_context);
3126 free(pid_context);
3127 } else {
3128 printf("proc_ctx=%-*s ", serv_width, "unavailable");
3129 }
3130 }
3131
3132 if (show_details) {
3133 printf(" sk=%llx cb=%llx groups=0x%08x", sk, cb, groups);
3134 }
3135 printf("\n");
3136
3137 return 0;
3138 }
3139
3140 static int netlink_show_sock(const struct sockaddr_nl *addr,
3141 struct nlmsghdr *nlh, void *arg)
3142 {
3143 struct filter *f = (struct filter *)arg;
3144 struct netlink_diag_msg *r = NLMSG_DATA(nlh);
3145 struct rtattr *tb[NETLINK_DIAG_MAX+1];
3146 int rq = 0, wq = 0;
3147 unsigned long groups = 0;
3148
3149 parse_rtattr(tb, NETLINK_DIAG_MAX, (struct rtattr*)(r+1),
3150 nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
3151
3152 if (tb[NETLINK_DIAG_GROUPS] && RTA_PAYLOAD(tb[NETLINK_DIAG_GROUPS]))
3153 groups = *(unsigned long *) RTA_DATA(tb[NETLINK_DIAG_GROUPS]);
3154
3155 if (tb[NETLINK_DIAG_MEMINFO]) {
3156 const __u32 *skmeminfo;
3157 skmeminfo = RTA_DATA(tb[NETLINK_DIAG_MEMINFO]);
3158
3159 rq = skmeminfo[SK_MEMINFO_RMEM_ALLOC];
3160 wq = skmeminfo[SK_MEMINFO_WMEM_ALLOC];
3161 }
3162
3163 if (netlink_show_one(f, r->ndiag_protocol, r->ndiag_portid, groups,
3164 r->ndiag_state, r->ndiag_dst_portid, r->ndiag_dst_group,
3165 rq, wq, 0, 0)) {
3166 return 0;
3167 }
3168
3169 if (show_mem) {
3170 printf("\t");
3171 print_skmeminfo(tb, NETLINK_DIAG_MEMINFO);
3172 printf("\n");
3173 }
3174
3175 return 0;
3176 }
3177
3178 static int netlink_show_netlink(struct filter *f)
3179 {
3180 DIAG_REQUEST(req, struct netlink_diag_req r);
3181
3182 req.r.sdiag_family = AF_NETLINK;
3183 req.r.sdiag_protocol = NDIAG_PROTO_ALL;
3184 req.r.ndiag_show = NDIAG_SHOW_GROUPS | NDIAG_SHOW_MEMINFO;
3185
3186 return handle_netlink_request(f, &req.nlh, sizeof(req), netlink_show_sock);
3187 }
3188
3189 static int netlink_show(struct filter *f)
3190 {
3191 FILE *fp;
3192 char buf[256];
3193 int prot, pid;
3194 unsigned groups;
3195 int rq, wq, rc;
3196 unsigned long long sk, cb;
3197
3198 if (!filter_af_get(f, AF_NETLINK) || !(f->states & (1 << SS_CLOSE)))
3199 return 0;
3200
3201 if (!getenv("PROC_NET_NETLINK") && !getenv("PROC_ROOT") &&
3202 netlink_show_netlink(f) == 0)
3203 return 0;
3204
3205 if ((fp = net_netlink_open()) == NULL)
3206 return -1;
3207 fgets(buf, sizeof(buf)-1, fp);
3208
3209 while (fgets(buf, sizeof(buf)-1, fp)) {
3210 sscanf(buf, "%llx %d %d %x %d %d %llx %d",
3211 &sk,
3212 &prot, &pid, &groups, &rq, &wq, &cb, &rc);
3213
3214 netlink_show_one(f, prot, pid, groups, 0, 0, 0, rq, wq, sk, cb);
3215 }
3216
3217 return 0;
3218 }
3219
3220 struct snmpstat
3221 {
3222 int tcp_estab;
3223 };
3224
3225 static int get_snmp_int(char *proto, char *key, int *result)
3226 {
3227 char buf[1024];
3228 FILE *fp;
3229 int protolen = strlen(proto);
3230 int keylen = strlen(key);
3231
3232 *result = 0;
3233
3234 if ((fp = net_snmp_open()) == NULL)
3235 return -1;
3236
3237 while (fgets(buf, sizeof(buf), fp) != NULL) {
3238 char *p = buf;
3239 int pos = 0;
3240 if (memcmp(buf, proto, protolen))
3241 continue;
3242 while ((p = strchr(p, ' ')) != NULL) {
3243 pos++;
3244 p++;
3245 if (memcmp(p, key, keylen) == 0 &&
3246 (p[keylen] == ' ' || p[keylen] == '\n'))
3247 break;
3248 }
3249 if (fgets(buf, sizeof(buf), fp) == NULL)
3250 break;
3251 if (memcmp(buf, proto, protolen))
3252 break;
3253 p = buf;
3254 while ((p = strchr(p, ' ')) != NULL) {
3255 p++;
3256 if (--pos == 0) {
3257 sscanf(p, "%d", result);
3258 fclose(fp);
3259 return 0;
3260 }
3261 }
3262 }
3263
3264 fclose(fp);
3265 errno = ESRCH;
3266 return -1;
3267 }
3268
3269
3270 /* Get stats from sockstat */
3271
3272 struct ssummary
3273 {
3274 int socks;
3275 int tcp_mem;
3276 int tcp_total;
3277 int tcp_orphans;
3278 int tcp_tws;
3279 int tcp4_hashed;
3280 int udp4;
3281 int raw4;
3282 int frag4;
3283 int frag4_mem;
3284 int tcp6_hashed;
3285 int udp6;
3286 int raw6;
3287 int frag6;
3288 int frag6_mem;
3289 };
3290
3291 static void get_sockstat_line(char *line, struct ssummary *s)
3292 {
3293 char id[256], rem[256];
3294
3295 if (sscanf(line, "%[^ ] %[^\n]\n", id, rem) != 2)
3296 return;
3297
3298 if (strcmp(id, "sockets:") == 0)
3299 sscanf(rem, "%*s%d", &s->socks);
3300 else if (strcmp(id, "UDP:") == 0)
3301 sscanf(rem, "%*s%d", &s->udp4);
3302 else if (strcmp(id, "UDP6:") == 0)
3303 sscanf(rem, "%*s%d", &s->udp6);
3304 else if (strcmp(id, "RAW:") == 0)
3305 sscanf(rem, "%*s%d", &s->raw4);
3306 else if (strcmp(id, "RAW6:") == 0)
3307 sscanf(rem, "%*s%d", &s->raw6);
3308 else if (strcmp(id, "TCP6:") == 0)
3309 sscanf(rem, "%*s%d", &s->tcp6_hashed);
3310 else if (strcmp(id, "FRAG:") == 0)
3311 sscanf(rem, "%*s%d%*s%d", &s->frag4, &s->frag4_mem);
3312 else if (strcmp(id, "FRAG6:") == 0)
3313 sscanf(rem, "%*s%d%*s%d", &s->frag6, &s->frag6_mem);
3314 else if (strcmp(id, "TCP:") == 0)
3315 sscanf(rem, "%*s%d%*s%d%*s%d%*s%d%*s%d",
3316 &s->tcp4_hashed,
3317 &s->tcp_orphans, &s->tcp_tws, &s->tcp_total, &s->tcp_mem);
3318 }
3319
3320 static int get_sockstat(struct ssummary *s)
3321 {
3322 char buf[256];
3323 FILE *fp;
3324
3325 memset(s, 0, sizeof(*s));
3326
3327 if ((fp = net_sockstat_open()) == NULL)
3328 return -1;
3329 while(fgets(buf, sizeof(buf), fp) != NULL)
3330 get_sockstat_line(buf, s);
3331 fclose(fp);
3332
3333 if ((fp = net_sockstat6_open()) == NULL)
3334 return 0;
3335 while(fgets(buf, sizeof(buf), fp) != NULL)
3336 get_sockstat_line(buf, s);
3337 fclose(fp);
3338
3339 return 0;
3340 }
3341
3342 static int print_summary(void)
3343 {
3344 struct ssummary s;
3345 struct snmpstat sn;
3346
3347 if (get_sockstat(&s) < 0)
3348 perror("ss: get_sockstat");
3349 if (get_snmp_int("Tcp:", "CurrEstab", &sn.tcp_estab) < 0)
3350 perror("ss: get_snmpstat");
3351
3352 get_slabstat(&slabstat);
3353
3354 printf("Total: %d (kernel %d)\n", s.socks, slabstat.socks);
3355
3356 printf("TCP: %d (estab %d, closed %d, orphaned %d, synrecv %d, timewait %d/%d), ports %d\n",
3357 s.tcp_total + slabstat.tcp_syns + s.tcp_tws,
3358 sn.tcp_estab,
3359 s.tcp_total - (s.tcp4_hashed+s.tcp6_hashed-s.tcp_tws),
3360 s.tcp_orphans,
3361 slabstat.tcp_syns,
3362 s.tcp_tws, slabstat.tcp_tws,
3363 slabstat.tcp_ports
3364 );
3365
3366 printf("\n");
3367 printf("Transport Total IP IPv6\n");
3368 printf("* %-9d %-9s %-9s\n", slabstat.socks, "-", "-");
3369 printf("RAW %-9d %-9d %-9d\n", s.raw4+s.raw6, s.raw4, s.raw6);
3370 printf("UDP %-9d %-9d %-9d\n", s.udp4+s.udp6, s.udp4, s.udp6);
3371 printf("TCP %-9d %-9d %-9d\n", s.tcp4_hashed+s.tcp6_hashed, s.tcp4_hashed, s.tcp6_hashed);
3372 printf("INET %-9d %-9d %-9d\n",
3373 s.raw4+s.udp4+s.tcp4_hashed+
3374 s.raw6+s.udp6+s.tcp6_hashed,
3375 s.raw4+s.udp4+s.tcp4_hashed,
3376 s.raw6+s.udp6+s.tcp6_hashed);
3377 printf("FRAG %-9d %-9d %-9d\n", s.frag4+s.frag6, s.frag4, s.frag6);
3378
3379 printf("\n");
3380
3381 return 0;
3382 }
3383
3384 static void _usage(FILE *dest)
3385 {
3386 fprintf(dest,
3387 "Usage: ss [ OPTIONS ]\n"
3388 " ss [ OPTIONS ] [ FILTER ]\n"
3389 " -h, --help this message\n"
3390 " -V, --version output version information\n"
3391 " -n, --numeric don't resolve service names\n"
3392 " -r, --resolve resolve host names\n"
3393 " -a, --all display all sockets\n"
3394 " -l, --listening display listening sockets\n"
3395 " -o, --options show timer information\n"
3396 " -e, --extended show detailed socket information\n"
3397 " -m, --memory show socket memory usage\n"
3398 " -p, --processes show process using socket\n"
3399 " -i, --info show internal TCP information\n"
3400 " -s, --summary show socket usage summary\n"
3401 " -b, --bpf show bpf filter socket information\n"
3402 " -Z, --context display process SELinux security contexts\n"
3403 " -z, --contexts display process and socket SELinux security contexts\n"
3404 " -N, --net switch to the specified network namespace name\n"
3405 "\n"
3406 " -4, --ipv4 display only IP version 4 sockets\n"
3407 " -6, --ipv6 display only IP version 6 sockets\n"
3408 " -0, --packet display PACKET sockets\n"
3409 " -t, --tcp display only TCP sockets\n"
3410 " -u, --udp display only UDP sockets\n"
3411 " -d, --dccp display only DCCP sockets\n"
3412 " -w, --raw display only RAW sockets\n"
3413 " -x, --unix display only Unix domain sockets\n"
3414 " -f, --family=FAMILY display sockets of type FAMILY\n"
3415 "\n"
3416 " -A, --query=QUERY, --socket=QUERY\n"
3417 " QUERY := {all|inet|tcp|udp|raw|unix|unix_dgram|unix_stream|unix_seqpacket|packet|netlink}[,QUERY]\n"
3418 "\n"
3419 " -D, --diag=FILE Dump raw information about TCP sockets to FILE\n"
3420 " -F, --filter=FILE read filter information from FILE\n"
3421 " FILTER := [ state STATE-FILTER ] [ EXPRESSION ]\n"
3422 " STATE-FILTER := {all|connected|synchronized|bucket|big|TCP-STATES}\n"
3423 " TCP-STATES := {established|syn-sent|syn-recv|fin-wait-{1,2}|time-wait|closed|close-wait|last-ack|listen|closing}\n"
3424 " connected := {established|syn-sent|syn-recv|fin-wait-{1,2}|time-wait|close-wait|last-ack|closing}\n"
3425 " synchronized := {established|syn-recv|fin-wait-{1,2}|time-wait|close-wait|last-ack|closing}\n"
3426 " bucket := {syn-recv|time-wait}\n"
3427 " big := {established|syn-sent|fin-wait-{1,2}|closed|close-wait|last-ack|listen|closing}\n"
3428 );
3429 }
3430
3431 static void help(void) __attribute__((noreturn));
3432 static void help(void)
3433 {
3434 _usage(stdout);
3435 exit(0);
3436 }
3437
3438 static void usage(void) __attribute__((noreturn));
3439 static void usage(void)
3440 {
3441 _usage(stderr);
3442 exit(-1);
3443 }
3444
3445
3446 static int scan_state(const char *state)
3447 {
3448 int i;
3449 if (strcasecmp(state, "close") == 0 ||
3450 strcasecmp(state, "closed") == 0)
3451 return (1<<SS_CLOSE);
3452 if (strcasecmp(state, "syn-rcv") == 0)
3453 return (1<<SS_SYN_RECV);
3454 if (strcasecmp(state, "established") == 0)
3455 return (1<<SS_ESTABLISHED);
3456 if (strcasecmp(state, "all") == 0)
3457 return SS_ALL;
3458 if (strcasecmp(state, "connected") == 0)
3459 return SS_ALL & ~((1<<SS_CLOSE)|(1<<SS_LISTEN));
3460 if (strcasecmp(state, "synchronized") == 0)
3461 return SS_ALL & ~((1<<SS_CLOSE)|(1<<SS_LISTEN)|(1<<SS_SYN_SENT));
3462 if (strcasecmp(state, "bucket") == 0)
3463 return (1<<SS_SYN_RECV)|(1<<SS_TIME_WAIT);
3464 if (strcasecmp(state, "big") == 0)
3465 return SS_ALL & ~((1<<SS_SYN_RECV)|(1<<SS_TIME_WAIT));
3466 for (i=0; i<SS_MAX; i++) {
3467 if (strcasecmp(state, sstate_namel[i]) == 0)
3468 return (1<<i);
3469 }
3470
3471 fprintf(stderr, "ss: wrong state name: %s\n", state);
3472 exit(-1);
3473 }
3474
3475 static const struct option long_opts[] = {
3476 { "numeric", 0, 0, 'n' },
3477 { "resolve", 0, 0, 'r' },
3478 { "options", 0, 0, 'o' },
3479 { "extended", 0, 0, 'e' },
3480 { "memory", 0, 0, 'm' },
3481 { "info", 0, 0, 'i' },
3482 { "processes", 0, 0, 'p' },
3483 { "bpf", 0, 0, 'b' },
3484 { "dccp", 0, 0, 'd' },
3485 { "tcp", 0, 0, 't' },
3486 { "udp", 0, 0, 'u' },
3487 { "raw", 0, 0, 'w' },
3488 { "unix", 0, 0, 'x' },
3489 { "all", 0, 0, 'a' },
3490 { "listening", 0, 0, 'l' },
3491 { "ipv4", 0, 0, '4' },
3492 { "ipv6", 0, 0, '6' },
3493 { "packet", 0, 0, '0' },
3494 { "family", 1, 0, 'f' },
3495 { "socket", 1, 0, 'A' },
3496 { "query", 1, 0, 'A' },
3497 { "summary", 0, 0, 's' },
3498 { "diag", 1, 0, 'D' },
3499 { "filter", 1, 0, 'F' },
3500 { "version", 0, 0, 'V' },
3501 { "help", 0, 0, 'h' },
3502 { "context", 0, 0, 'Z' },
3503 { "contexts", 0, 0, 'z' },
3504 { "net", 1, 0, 'N' },
3505 { 0 }
3506
3507 };
3508
3509 int main(int argc, char *argv[])
3510 {
3511 int saw_states = 0;
3512 int saw_query = 0;
3513 int do_summary = 0;
3514 const char *dump_tcpdiag = NULL;
3515 FILE *filter_fp = NULL;
3516 int ch;
3517 int state_filter = 0;
3518
3519 while ((ch = getopt_long(argc, argv, "dhaletuwxnro460spbf:miA:D:F:vVzZN:",
3520 long_opts, NULL)) != EOF) {
3521 switch(ch) {
3522 case 'n':
3523 resolve_services = 0;
3524 break;
3525 case 'r':
3526 resolve_hosts = 1;
3527 break;
3528 case 'o':
3529 show_options = 1;
3530 break;
3531 case 'e':
3532 show_options = 1;
3533 show_details++;
3534 break;
3535 case 'm':
3536 show_mem = 1;
3537 break;
3538 case 'i':
3539 show_tcpinfo = 1;
3540 break;
3541 case 'p':
3542 show_users++;
3543 user_ent_hash_build();
3544 break;
3545 case 'b':
3546 show_options = 1;
3547 show_bpf++;
3548 break;
3549 case 'd':
3550 filter_db_set(&current_filter, DCCP_DB);
3551 break;
3552 case 't':
3553 filter_db_set(&current_filter, TCP_DB);
3554 break;
3555 case 'u':
3556 filter_db_set(&current_filter, UDP_DB);
3557 break;
3558 case 'w':
3559 filter_db_set(&current_filter, RAW_DB);
3560 break;
3561 case 'x':
3562 filter_af_set(&current_filter, AF_UNIX);
3563 break;
3564 case 'a':
3565 state_filter = SS_ALL;
3566 break;
3567 case 'l':
3568 state_filter = (1 << SS_LISTEN) | (1 << SS_CLOSE);
3569 break;
3570 case '4':
3571 filter_af_set(&current_filter, AF_INET);
3572 break;
3573 case '6':
3574 filter_af_set(&current_filter, AF_INET6);
3575 break;
3576 case '0':
3577 filter_af_set(&current_filter, AF_PACKET);
3578 break;
3579 case 'f':
3580 if (strcmp(optarg, "inet") == 0)
3581 filter_af_set(&current_filter, AF_INET);
3582 else if (strcmp(optarg, "inet6") == 0)
3583 filter_af_set(&current_filter, AF_INET6);
3584 else if (strcmp(optarg, "link") == 0)
3585 filter_af_set(&current_filter, AF_PACKET);
3586 else if (strcmp(optarg, "unix") == 0)
3587 filter_af_set(&current_filter, AF_UNIX);
3588 else if (strcmp(optarg, "netlink") == 0)
3589 filter_af_set(&current_filter, AF_NETLINK);
3590 else if (strcmp(optarg, "help") == 0)
3591 help();
3592 else {
3593 fprintf(stderr, "ss: \"%s\" is invalid family\n",
3594 optarg);
3595 usage();
3596 }
3597 break;
3598 case 'A':
3599 {
3600 char *p, *p1;
3601 if (!saw_query) {
3602 current_filter.dbs = 0;
3603 saw_query = 1;
3604 do_default = 0;
3605 }
3606 p = p1 = optarg;
3607 do {
3608 if ((p1 = strchr(p, ',')) != NULL)
3609 *p1 = 0;
3610 if (strcmp(p, "all") == 0) {
3611 filter_default_dbs(&current_filter);
3612 } else if (strcmp(p, "inet") == 0) {
3613 filter_db_set(&current_filter, UDP_DB);
3614 filter_db_set(&current_filter, DCCP_DB);
3615 filter_db_set(&current_filter, TCP_DB);
3616 filter_db_set(&current_filter, RAW_DB);
3617 } else if (strcmp(p, "udp") == 0) {
3618 filter_db_set(&current_filter, UDP_DB);
3619 } else if (strcmp(p, "dccp") == 0) {
3620 filter_db_set(&current_filter, DCCP_DB);
3621 } else if (strcmp(p, "tcp") == 0) {
3622 filter_db_set(&current_filter, TCP_DB);
3623 } else if (strcmp(p, "raw") == 0) {
3624 filter_db_set(&current_filter, RAW_DB);
3625 } else if (strcmp(p, "unix") == 0) {
3626 filter_db_set(&current_filter, UNIX_ST_DB);
3627 filter_db_set(&current_filter, UNIX_DG_DB);
3628 filter_db_set(&current_filter, UNIX_SQ_DB);
3629 } else if (strcasecmp(p, "unix_stream") == 0 ||
3630 strcmp(p, "u_str") == 0) {
3631 filter_db_set(&current_filter, UNIX_ST_DB);
3632 } else if (strcasecmp(p, "unix_dgram") == 0 ||
3633 strcmp(p, "u_dgr") == 0) {
3634 filter_db_set(&current_filter, UNIX_DG_DB);
3635 } else if (strcasecmp(p, "unix_seqpacket") == 0 ||
3636 strcmp(p, "u_seq") == 0) {
3637 filter_db_set(&current_filter, UNIX_SQ_DB);
3638 } else if (strcmp(p, "packet") == 0) {
3639 filter_db_set(&current_filter, PACKET_R_DB);
3640 filter_db_set(&current_filter, PACKET_DG_DB);
3641 } else if (strcmp(p, "packet_raw") == 0 ||
3642 strcmp(p, "p_raw") == 0) {
3643 filter_db_set(&current_filter, PACKET_R_DB);
3644 } else if (strcmp(p, "packet_dgram") == 0 ||
3645 strcmp(p, "p_dgr") == 0) {
3646 filter_db_set(&current_filter, PACKET_DG_DB);
3647 } else if (strcmp(p, "netlink") == 0) {
3648 filter_db_set(&current_filter, NETLINK_DB);
3649 } else {
3650 fprintf(stderr, "ss: \"%s\" is illegal socket table id\n", p);
3651 usage();
3652 }
3653 p = p1 + 1;
3654 } while (p1);
3655 break;
3656 }
3657 case 's':
3658 do_summary = 1;
3659 break;
3660 case 'D':
3661 dump_tcpdiag = optarg;
3662 break;
3663 case 'F':
3664 if (filter_fp) {
3665 fprintf(stderr, "More than one filter file\n");
3666 exit(-1);
3667 }
3668 if (optarg[0] == '-')
3669 filter_fp = stdin;
3670 else
3671 filter_fp = fopen(optarg, "r");
3672 if (!filter_fp) {
3673 perror("fopen filter file");
3674 exit(-1);
3675 }
3676 break;
3677 case 'v':
3678 case 'V':
3679 printf("ss utility, iproute2-ss%s\n", SNAPSHOT);
3680 exit(0);
3681 case 'z':
3682 show_sock_ctx++;
3683 case 'Z':
3684 if (is_selinux_enabled() <= 0) {
3685 fprintf(stderr, "ss: SELinux is not enabled.\n");
3686 exit(1);
3687 }
3688 show_proc_ctx++;
3689 user_ent_hash_build();
3690 break;
3691 case 'N':
3692 if (netns_switch(optarg))
3693 exit(1);
3694 break;
3695 case 'h':
3696 case '?':
3697 help();
3698 default:
3699 usage();
3700 }
3701 }
3702
3703 argc -= optind;
3704 argv += optind;
3705
3706 if (do_summary) {
3707 print_summary();
3708 if (do_default && argc == 0)
3709 exit(0);
3710 }
3711
3712 /* Now parse filter... */
3713 if (argc == 0 && filter_fp) {
3714 if (ssfilter_parse(&current_filter.f, 0, NULL, filter_fp))
3715 usage();
3716 }
3717
3718 while (argc > 0) {
3719 if (strcmp(*argv, "state") == 0) {
3720 NEXT_ARG();
3721 if (!saw_states)
3722 state_filter = 0;
3723 state_filter |= scan_state(*argv);
3724 saw_states = 1;
3725 } else if (strcmp(*argv, "exclude") == 0 ||
3726 strcmp(*argv, "excl") == 0) {
3727 NEXT_ARG();
3728 if (!saw_states)
3729 state_filter = SS_ALL;
3730 state_filter &= ~scan_state(*argv);
3731 saw_states = 1;
3732 } else {
3733 break;
3734 }
3735 argc--; argv++;
3736 }
3737
3738 if (do_default) {
3739 state_filter = state_filter ? state_filter : SS_CONN;
3740 filter_default_dbs(&current_filter);
3741 }
3742
3743 filter_states_set(&current_filter, state_filter);
3744 filter_merge_defaults(&current_filter);
3745
3746 if (resolve_services && resolve_hosts &&
3747 (current_filter.dbs&(UNIX_DBM|(1<<TCP_DB)|(1<<UDP_DB)|(1<<DCCP_DB))))
3748 init_service_resolver();
3749
3750
3751 if (current_filter.dbs == 0) {
3752 fprintf(stderr, "ss: no socket tables to show with such filter.\n");
3753 exit(0);
3754 }
3755 if (current_filter.families == 0) {
3756 fprintf(stderr, "ss: no families to show with such filter.\n");
3757 exit(0);
3758 }
3759 if (current_filter.states == 0) {
3760 fprintf(stderr, "ss: no socket states to show with such filter.\n");
3761 exit(0);
3762 }
3763
3764 if (dump_tcpdiag) {
3765 FILE *dump_fp = stdout;
3766 if (!(current_filter.dbs & (1<<TCP_DB))) {
3767 fprintf(stderr, "ss: tcpdiag dump requested and no tcp in filter.\n");
3768 exit(0);
3769 }
3770 if (dump_tcpdiag[0] != '-') {
3771 dump_fp = fopen(dump_tcpdiag, "w");
3772 if (!dump_tcpdiag) {
3773 perror("fopen dump file");
3774 exit(-1);
3775 }
3776 }
3777 inet_show_netlink(&current_filter, dump_fp, IPPROTO_TCP);
3778 fflush(dump_fp);
3779 exit(0);
3780 }
3781
3782 if (ssfilter_parse(&current_filter.f, argc, argv, filter_fp))
3783 usage();
3784
3785 netid_width = 0;
3786 if (current_filter.dbs&(current_filter.dbs-1))
3787 netid_width = 5;
3788
3789 state_width = 0;
3790 if (current_filter.states&(current_filter.states-1))
3791 state_width = 10;
3792
3793 screen_width = 80;
3794 if (isatty(STDOUT_FILENO)) {
3795 struct winsize w;
3796
3797 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) != -1) {
3798 if (w.ws_col > 0)
3799 screen_width = w.ws_col;
3800 }
3801 }
3802
3803 addrp_width = screen_width;
3804 addrp_width -= netid_width+1;
3805 addrp_width -= state_width+1;
3806 addrp_width -= 14;
3807
3808 if (addrp_width&1) {
3809 if (netid_width)
3810 netid_width++;
3811 else if (state_width)
3812 state_width++;
3813 }
3814
3815 addrp_width /= 2;
3816 addrp_width--;
3817
3818 serv_width = resolve_services ? 7 : 5;
3819
3820 if (addrp_width < 15+serv_width+1)
3821 addrp_width = 15+serv_width+1;
3822
3823 addr_width = addrp_width - serv_width - 1;
3824
3825 if (netid_width)
3826 printf("%-*s ", netid_width, "Netid");
3827 if (state_width)
3828 printf("%-*s ", state_width, "State");
3829 printf("%-6s %-6s ", "Recv-Q", "Send-Q");
3830
3831 /* Make enough space for the local/remote port field */
3832 addr_width -= 13;
3833 serv_width += 13;
3834
3835 printf("%*s:%-*s %*s:%-*s\n",
3836 addr_width, "Local Address", serv_width, "Port",
3837 addr_width, "Peer Address", serv_width, "Port");
3838
3839 fflush(stdout);
3840
3841 if (current_filter.dbs & (1<<NETLINK_DB))
3842 netlink_show(&current_filter);
3843 if (current_filter.dbs & PACKET_DBM)
3844 packet_show(&current_filter);
3845 if (current_filter.dbs & UNIX_DBM)
3846 unix_show(&current_filter);
3847 if (current_filter.dbs & (1<<RAW_DB))
3848 raw_show(&current_filter);
3849 if (current_filter.dbs & (1<<UDP_DB))
3850 udp_show(&current_filter);
3851 if (current_filter.dbs & (1<<TCP_DB))
3852 tcp_show(&current_filter, IPPROTO_TCP);
3853 if (current_filter.dbs & (1<<DCCP_DB))
3854 tcp_show(&current_filter, IPPROTO_DCCP);
3855
3856 if (show_users || show_proc_ctx || show_sock_ctx)
3857 user_ent_destroy();
3858
3859 return 0;
3860 }
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