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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
19 #include <sys/socket.h>
20 #include <netinet/in.h>
24 #include <arpa/inet.h>
25 #include <asm/types.h>
26 #include <linux/pkt_sched.h>
27 #include <linux/param.h>
28 #include <linux/if_arp.h>
29 #include <linux/mpls.h>
34 #include <sys/capability.h>
40 #include "namespace.h"
46 int read_prop(const char *dev
, char *prop
, long *value
)
48 char fname
[128], buf
[80], *endp
, *nl
;
53 ret
= snprintf(fname
, sizeof(fname
), "/sys/class/net/%s/%s",
56 if (ret
<= 0 || ret
>= sizeof(fname
)) {
57 fprintf(stderr
, "could not build pathname for property\n");
61 fp
= fopen(fname
, "r");
63 fprintf(stderr
, "fopen %s: %s\n", fname
, strerror(errno
));
67 if (!fgets(buf
, sizeof(buf
), fp
)) {
68 fprintf(stderr
, "property \"%s\" in file %s is currently unknown\n", prop
, fname
);
73 nl
= strchr(buf
, '\n');
78 result
= strtol(buf
, &endp
, 0);
80 if (*endp
|| buf
== endp
) {
81 fprintf(stderr
, "value \"%s\" in file %s is not a number\n",
86 if ((result
== LONG_MAX
|| result
== LONG_MIN
) && errno
== ERANGE
) {
87 fprintf(stderr
, "strtol %s: %s", fname
, strerror(errno
));
94 fprintf(stderr
, "Failed to parse %s\n", fname
);
98 /* Parse a percent e.g: '30%'
99 * return: 0 = ok, -1 = error, 1 = out of range
101 int parse_percent(double *val
, const char *str
)
105 *val
= strtod(str
, &p
) / 100.;
106 if (*val
== HUGE_VALF
|| *val
== HUGE_VALL
)
108 if (*val
== 0.0 || (*p
&& strcmp(p
, "%")))
116 if (c
>= 'A' && c
<= 'F')
118 if (c
>= 'a' && c
<= 'f')
120 if (c
>= '0' && c
<= '9')
126 int get_integer(int *val
, const char *arg
, int base
)
134 res
= strtol(arg
, &ptr
, base
);
136 /* If there were no digits at all, strtol() stores
137 * the original value of nptr in *endptr (and returns 0).
138 * In particular, if *nptr is not '\0' but **endptr is '\0' on return,
139 * the entire string is valid.
141 if (!ptr
|| ptr
== arg
|| *ptr
)
144 /* If an underflow occurs, strtol() returns LONG_MIN.
145 * If an overflow occurs, strtol() returns LONG_MAX.
146 * In both cases, errno is set to ERANGE.
148 if ((res
== LONG_MAX
|| res
== LONG_MIN
) && errno
== ERANGE
)
151 /* Outside range of int */
152 if (res
< INT_MIN
|| res
> INT_MAX
)
159 int mask2bits(__u32 netmask
)
161 unsigned int bits
= 0;
162 __u32 mask
= ntohl(netmask
);
165 /* a valid netmask must be 2^n - 1 */
166 if ((host
& (host
+ 1)) != 0)
169 for (; mask
; mask
<<= 1)
174 static int get_netmask(unsigned int *val
, const char *arg
, int base
)
178 if (!get_unsigned(val
, arg
, base
))
181 /* try coverting dotted quad to CIDR */
182 if (!get_addr_1(&addr
, arg
, AF_INET
) && addr
.family
== AF_INET
) {
183 int b
= mask2bits(addr
.data
[0]);
194 int get_unsigned(unsigned int *val
, const char *arg
, int base
)
202 res
= strtoul(arg
, &ptr
, base
);
204 /* empty string or trailing non-digits */
205 if (!ptr
|| ptr
== arg
|| *ptr
)
209 if (res
== ULONG_MAX
&& errno
== ERANGE
)
212 /* out side range of unsigned */
221 * get_time_rtt is "translated" from a similar routine "get_time" in
222 * tc_util.c. We don't use the exact same routine because tc passes
223 * microseconds to the kernel and the callers of get_time_rtt want to
224 * pass milliseconds (standard unit for rtt values since 2.6.27), and
225 * have a different assumption for the units of a "raw" number.
227 int get_time_rtt(unsigned int *val
, const char *arg
, int *raw
)
233 if (strchr(arg
, '.') != NULL
) {
243 if ((t
== HUGE_VALF
|| t
== HUGE_VALL
) && errno
== ERANGE
)
246 res
= strtoul(arg
, &p
, 0);
253 if (res
== ULONG_MAX
&& errno
== ERANGE
)
265 if (strcasecmp(p
, "s") == 0 ||
266 strcasecmp(p
, "sec") == 0 ||
267 strcasecmp(p
, "secs") == 0)
269 else if (strcasecmp(p
, "ms") == 0 ||
270 strcasecmp(p
, "msec") == 0 ||
271 strcasecmp(p
, "msecs") == 0)
272 t
*= 1.0; /* allow suffix, do nothing */
277 /* emulate ceil() without having to bring-in -lm and always be >= 1 */
286 int get_u64(__u64
*val
, const char *arg
, int base
)
288 unsigned long long res
;
294 res
= strtoull(arg
, &ptr
, base
);
296 /* empty string or trailing non-digits */
297 if (!ptr
|| ptr
== arg
|| *ptr
)
301 if (res
== ULLONG_MAX
&& errno
== ERANGE
)
304 /* in case ULL is 128 bits */
305 if (res
> 0xFFFFFFFFFFFFFFFFULL
)
312 int get_u32(__u32
*val
, const char *arg
, int base
)
319 res
= strtoul(arg
, &ptr
, base
);
321 /* empty string or trailing non-digits */
322 if (!ptr
|| ptr
== arg
|| *ptr
)
326 if (res
== ULONG_MAX
&& errno
== ERANGE
)
329 /* in case UL > 32 bits */
330 if (res
> 0xFFFFFFFFUL
)
337 int get_u16(__u16
*val
, const char *arg
, int base
)
344 res
= strtoul(arg
, &ptr
, base
);
346 /* empty string or trailing non-digits */
347 if (!ptr
|| ptr
== arg
|| *ptr
)
351 if (res
== ULONG_MAX
&& errno
== ERANGE
)
361 int get_u8(__u8
*val
, const char *arg
, int base
)
369 res
= strtoul(arg
, &ptr
, base
);
370 /* empty string or trailing non-digits */
371 if (!ptr
|| ptr
== arg
|| *ptr
)
375 if (res
== ULONG_MAX
&& errno
== ERANGE
)
385 int get_s32(__s32
*val
, const char *arg
, int base
)
394 res
= strtol(arg
, &ptr
, base
);
395 if (!ptr
|| ptr
== arg
|| *ptr
)
397 if ((res
== LONG_MIN
|| res
== LONG_MAX
) && errno
== ERANGE
)
399 if (res
> INT32_MAX
|| res
< INT32_MIN
)
406 int get_s16(__s16
*val
, const char *arg
, int base
)
413 res
= strtol(arg
, &ptr
, base
);
414 if (!ptr
|| ptr
== arg
|| *ptr
)
416 if ((res
== LONG_MIN
|| res
== LONG_MAX
) && errno
== ERANGE
)
418 if (res
> 0x7FFF || res
< -0x8000)
425 int get_s8(__s8
*val
, const char *arg
, int base
)
432 res
= strtol(arg
, &ptr
, base
);
433 if (!ptr
|| ptr
== arg
|| *ptr
)
435 if ((res
== LONG_MIN
|| res
== LONG_MAX
) && errno
== ERANGE
)
437 if (res
> 0x7F || res
< -0x80)
443 int get_be64(__be64
*val
, const char *arg
, int base
)
446 int ret
= get_u64(&v
, arg
, base
);
454 int get_be32(__be32
*val
, const char *arg
, int base
)
457 int ret
= get_u32(&v
, arg
, base
);
465 int get_be16(__be16
*val
, const char *arg
, int base
)
468 int ret
= get_u16(&v
, arg
, base
);
476 /* This uses a non-standard parsing (ie not inet_aton, or inet_pton)
477 * because of legacy choice to parse 10.8 as 10.8.0.0 not 10.0.0.8
479 static int get_addr_ipv4(__u8
*ap
, const char *cp
)
483 for (i
= 0; i
< 4; i
++) {
487 n
= strtoul(cp
, &endp
, 0);
489 return -1; /* bogus network value */
491 if (endp
== cp
) /* no digits */
499 if (i
== 3 || *endp
!= '.')
500 return -1; /* extra characters */
507 int get_addr64(__u64
*ap
, const char *cp
)
516 for (i
= 0; i
< 4; i
++) {
520 n
= strtoul(cp
, &endp
, 16);
522 return -1; /* bogus network value */
524 if (endp
== cp
) /* no digits */
527 val
.v16
[i
] = htons(n
);
532 if (i
== 3 || *endp
!= ':')
533 return -1; /* extra characters */
542 static void set_address_type(inet_prefix
*addr
)
544 switch (addr
->family
) {
547 addr
->flags
|= ADDRTYPE_INET_UNSPEC
;
548 else if (IN_MULTICAST(ntohl(addr
->data
[0])))
549 addr
->flags
|= ADDRTYPE_INET_MULTI
;
551 addr
->flags
|= ADDRTYPE_INET
;
554 if (IN6_IS_ADDR_UNSPECIFIED(addr
->data
))
555 addr
->flags
|= ADDRTYPE_INET_UNSPEC
;
556 else if (IN6_IS_ADDR_MULTICAST(addr
->data
))
557 addr
->flags
|= ADDRTYPE_INET_MULTI
;
559 addr
->flags
|= ADDRTYPE_INET
;
564 static int __get_addr_1(inet_prefix
*addr
, const char *name
, int family
)
566 memset(addr
, 0, sizeof(*addr
));
568 if (strcmp(name
, "default") == 0) {
569 if ((family
== AF_DECnet
) || (family
== AF_MPLS
))
571 addr
->family
= (family
!= AF_UNSPEC
) ? family
: AF_INET
;
572 addr
->bytelen
= af_byte_len(addr
->family
);
574 addr
->flags
|= PREFIXLEN_SPECIFIED
;
578 if (strcmp(name
, "all") == 0 ||
579 strcmp(name
, "any") == 0) {
580 if ((family
== AF_DECnet
) || (family
== AF_MPLS
))
582 addr
->family
= AF_UNSPEC
;
588 if (family
== AF_PACKET
) {
591 len
= ll_addr_a2n((char *) &addr
->data
, sizeof(addr
->data
),
596 addr
->family
= AF_PACKET
;
598 addr
->bitlen
= len
* 8;
602 if (strchr(name
, ':')) {
603 addr
->family
= AF_INET6
;
604 if (family
!= AF_UNSPEC
&& family
!= AF_INET6
)
606 if (inet_pton(AF_INET6
, name
, addr
->data
) <= 0)
613 if (family
== AF_DECnet
) {
616 addr
->family
= AF_DECnet
;
617 if (dnet_pton(AF_DECnet
, name
, &dna
) <= 0)
619 memcpy(addr
->data
, dna
.a_addr
, 2);
625 if (family
== AF_MPLS
) {
626 unsigned int maxlabels
;
629 addr
->family
= AF_MPLS
;
630 if (mpls_pton(AF_MPLS
, name
, addr
->data
,
631 sizeof(addr
->data
)) <= 0)
635 /* How many bytes do I need? */
636 maxlabels
= sizeof(addr
->data
) / sizeof(struct mpls_label
);
637 for (i
= 0; i
< maxlabels
; i
++) {
638 if (ntohl(addr
->data
[i
]) & MPLS_LS_S_MASK
) {
639 addr
->bytelen
= (i
+ 1)*4;
646 addr
->family
= AF_INET
;
647 if (family
!= AF_UNSPEC
&& family
!= AF_INET
)
650 if (get_addr_ipv4((__u8
*)addr
->data
, name
) <= 0)
658 int get_addr_1(inet_prefix
*addr
, const char *name
, int family
)
662 ret
= __get_addr_1(addr
, name
, family
);
666 set_address_type(addr
);
670 int af_bit_len(int af
)
688 int af_byte_len(int af
)
690 return af_bit_len(af
) / 8;
693 int get_prefix_1(inet_prefix
*dst
, char *arg
, int family
)
696 int err
, bitlen
, flags
;
698 slash
= strchr(arg
, '/');
702 err
= get_addr_1(dst
, arg
, family
);
710 bitlen
= af_bit_len(dst
->family
);
716 if (dst
->bitlen
== -2)
718 if (get_netmask(&plen
, slash
+ 1, 0))
723 flags
|= PREFIXLEN_SPECIFIED
;
726 if (dst
->bitlen
== -2)
731 dst
->bitlen
= bitlen
;
736 static const char *family_name_verbose(int family
)
738 if (family
== AF_UNSPEC
)
740 return family_name(family
);
743 int get_addr(inet_prefix
*dst
, const char *arg
, int family
)
745 if (get_addr_1(dst
, arg
, family
)) {
747 "Error: %s address is expected rather than \"%s\".\n",
748 family_name_verbose(family
), arg
);
754 int get_addr_rta(inet_prefix
*dst
, const struct rtattr
*rta
, int family
)
756 const int len
= RTA_PAYLOAD(rta
);
757 const void *data
= RTA_DATA(rta
);
761 dst
->family
= AF_INET
;
763 memcpy(dst
->data
, data
, 4);
766 dst
->family
= AF_INET6
;
768 memcpy(dst
->data
, data
, 16);
771 dst
->family
= AF_DECnet
;
773 memcpy(dst
->data
, data
, 2);
776 dst
->family
= AF_IPX
;
778 memcpy(dst
->data
, data
, 10);
784 if (family
!= AF_UNSPEC
&& family
!= dst
->family
)
790 set_address_type(dst
);
794 int get_prefix(inet_prefix
*dst
, char *arg
, int family
)
796 if (family
== AF_PACKET
) {
798 "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n",
803 if (get_prefix_1(dst
, arg
, family
)) {
805 "Error: %s prefix is expected rather than \"%s\".\n",
806 family_name_verbose(family
), arg
);
812 __u32
get_addr32(const char *name
)
816 if (get_addr_1(&addr
, name
, AF_INET
)) {
818 "Error: an IP address is expected rather than \"%s\"\n",
825 void incomplete_command(void)
827 fprintf(stderr
, "Command line is not complete. Try option \"help\"\n");
831 void missarg(const char *key
)
833 fprintf(stderr
, "Error: argument \"%s\" is required\n", key
);
837 void invarg(const char *msg
, const char *arg
)
839 fprintf(stderr
, "Error: argument \"%s\" is wrong: %s\n", arg
, msg
);
843 void duparg(const char *key
, const char *arg
)
846 "Error: duplicate \"%s\": \"%s\" is the second value.\n",
851 void duparg2(const char *key
, const char *arg
)
854 "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n",
859 int nodev(const char *dev
)
861 fprintf(stderr
, "Cannot find device \"%s\"\n", dev
);
865 int check_ifname(const char *name
)
867 /* These checks mimic kernel checks in dev_valid_name */
870 if (strlen(name
) >= IFNAMSIZ
)
874 if (*name
== '/' || isspace(*name
))
881 /* buf is assumed to be IFNAMSIZ */
882 int get_ifname(char *buf
, const char *name
)
886 ret
= check_ifname(name
);
888 strncpy(buf
, name
, IFNAMSIZ
);
893 const char *get_ifname_rta(int ifindex
, const struct rtattr
*rta
)
898 name
= rta_getattr_str(rta
);
901 "BUG: device with ifindex %d has nil ifname\n",
903 name
= ll_idx_n2a(ifindex
);
906 if (check_ifname(name
))
912 int matches(const char *cmd
, const char *pattern
)
914 int len
= strlen(cmd
);
916 if (len
> strlen(pattern
))
918 return memcmp(pattern
, cmd
, len
);
921 int inet_addr_match(const inet_prefix
*a
, const inet_prefix
*b
, int bits
)
923 const __u32
*a1
= a
->data
;
924 const __u32
*a2
= b
->data
;
925 int words
= bits
>> 0x05;
930 if (memcmp(a1
, a2
, words
<< 2))
940 mask
= htonl((0xffffffff) << (0x20 - bits
));
942 if ((w1
^ w2
) & mask
)
949 int inet_addr_match_rta(const inet_prefix
*m
, const struct rtattr
*rta
)
953 if (!rta
|| m
->family
== AF_UNSPEC
|| m
->bitlen
<= 0)
956 if (get_addr_rta(&dst
, rta
, m
->family
))
959 return inet_addr_match(&dst
, m
, m
->bitlen
);
962 int __iproute2_hz_internal
;
971 return atoi(getenv("HZ")) ? : HZ
;
973 if (getenv("PROC_NET_PSCHED"))
974 snprintf(name
, sizeof(name
)-1,
975 "%s", getenv("PROC_NET_PSCHED"));
976 else if (getenv("PROC_ROOT"))
977 snprintf(name
, sizeof(name
)-1,
978 "%s/net/psched", getenv("PROC_ROOT"));
980 strcpy(name
, "/proc/net/psched");
982 fp
= fopen(name
, "r");
985 unsigned int nom
, denom
;
987 if (fscanf(fp
, "%*08x%*08x%08x%08x", &nom
, &denom
) == 2)
997 int __iproute2_user_hz_internal
;
999 int __get_user_hz(void)
1001 return sysconf(_SC_CLK_TCK
);
1004 const char *rt_addr_n2a_r(int af
, int len
,
1005 const void *addr
, char *buf
, int buflen
)
1010 return inet_ntop(af
, addr
, buf
, buflen
);
1012 return mpls_ntop(af
, addr
, buf
, buflen
);
1014 return ipx_ntop(af
, addr
, buf
, buflen
);
1017 struct dn_naddr dna
= { 2, { 0, 0, } };
1019 memcpy(dna
.a_addr
, addr
, 2);
1020 return dnet_ntop(af
, &dna
, buf
, buflen
);
1023 return ll_addr_n2a(addr
, len
, ARPHRD_VOID
, buf
, buflen
);
1028 struct sockaddr_in sin
;
1029 struct sockaddr_in6 sin6
;
1032 switch (sa
->sa
.sa_family
) {
1034 return inet_ntop(AF_INET
, &sa
->sin
.sin_addr
,
1037 return inet_ntop(AF_INET6
, &sa
->sin6
.sin6_addr
,
1048 const char *rt_addr_n2a(int af
, int len
, const void *addr
)
1050 static char buf
[256];
1052 return rt_addr_n2a_r(af
, len
, addr
, buf
, 256);
1055 int read_family(const char *name
)
1057 int family
= AF_UNSPEC
;
1059 if (strcmp(name
, "inet") == 0)
1061 else if (strcmp(name
, "inet6") == 0)
1063 else if (strcmp(name
, "dnet") == 0)
1065 else if (strcmp(name
, "link") == 0)
1067 else if (strcmp(name
, "ipx") == 0)
1069 else if (strcmp(name
, "mpls") == 0)
1071 else if (strcmp(name
, "bridge") == 0)
1076 const char *family_name(int family
)
1078 if (family
== AF_INET
)
1080 if (family
== AF_INET6
)
1082 if (family
== AF_DECnet
)
1084 if (family
== AF_PACKET
)
1086 if (family
== AF_IPX
)
1088 if (family
== AF_MPLS
)
1090 if (family
== AF_BRIDGE
)
1095 #ifdef RESOLVE_HOSTNAMES
1097 struct namerec
*next
;
1103 static struct namerec
*nht
[NHASH
];
1105 static const char *resolve_address(const void *addr
, int len
, int af
)
1108 struct hostent
*h_ent
;
1110 static int notfirst
;
1113 if (af
== AF_INET6
&& ((__u32
*)addr
)[0] == 0 &&
1114 ((__u32
*)addr
)[1] == 0 && ((__u32
*)addr
)[2] == htonl(0xffff)) {
1120 hash
= *(__u32
*)(addr
+ len
- 4) % NHASH
;
1122 for (n
= nht
[hash
]; n
; n
= n
->next
) {
1123 if (n
->addr
.family
== af
&&
1124 n
->addr
.bytelen
== len
&&
1125 memcmp(n
->addr
.data
, addr
, len
) == 0)
1128 n
= malloc(sizeof(*n
));
1131 n
->addr
.family
= af
;
1132 n
->addr
.bytelen
= len
;
1134 memcpy(n
->addr
.data
, addr
, len
);
1135 n
->next
= nht
[hash
];
1137 if (++notfirst
== 1)
1141 h_ent
= gethostbyaddr(addr
, len
, af
);
1143 n
->name
= strdup(h_ent
->h_name
);
1145 /* Even if we fail, "negative" entry is remembered. */
1150 const char *format_host_r(int af
, int len
, const void *addr
,
1151 char *buf
, int buflen
)
1153 #ifdef RESOLVE_HOSTNAMES
1154 if (resolve_hosts
) {
1157 len
= len
<= 0 ? af_byte_len(af
) : len
;
1160 (n
= resolve_address(addr
, len
, af
)) != NULL
)
1164 return rt_addr_n2a_r(af
, len
, addr
, buf
, buflen
);
1167 const char *format_host(int af
, int len
, const void *addr
)
1169 static char buf
[256];
1171 return format_host_r(af
, len
, addr
, buf
, 256);
1175 char *hexstring_n2a(const __u8
*str
, int len
, char *buf
, int blen
)
1180 for (i
= 0; i
< len
; i
++) {
1183 sprintf(ptr
, "%02x", str
[i
]);
1190 __u8
*hexstring_a2n(const char *str
, __u8
*buf
, int blen
, unsigned int *len
)
1192 unsigned int cnt
= 0;
1195 if (strlen(str
) % 2)
1197 while (cnt
< blen
&& strlen(str
) > 1) {
1201 strncpy(tmpstr
, str
, 2);
1204 tmp
= strtoul(tmpstr
, &endptr
, 16);
1205 if (errno
!= 0 || tmp
> 0xFF || *endptr
!= '\0')
1217 int hex2mem(const char *buf
, uint8_t *mem
, int count
)
1222 for (i
= 0, j
= 0; i
< count
; i
++, j
+= 2) {
1223 c
= get_hex(buf
[j
]);
1229 c
= get_hex(buf
[j
+ 1]);
1239 int addr64_n2a(__u64 addr
, char *buff
, size_t len
)
1241 __u16
*words
= (__u16
*)&addr
;
1247 for (i
= 0; i
< 4; i
++) {
1248 v
= ntohs(words
[i
]);
1253 ret
= snprintf(&buff
[written
], len
- written
, "%x%s", v
, sep
);
1263 /* Print buffer and escape bytes that are !isprint or among 'escape' */
1264 void print_escape_buf(const __u8
*buf
, size_t len
, const char *escape
)
1268 for (i
= 0; i
< len
; ++i
) {
1269 if (isprint(buf
[i
]) && buf
[i
] != '\\' &&
1270 !strchr(escape
, buf
[i
]))
1271 printf("%c", buf
[i
]);
1273 printf("\\%03o", buf
[i
]);
1277 int print_timestamp(FILE *fp
)
1282 gettimeofday(&tv
, NULL
);
1283 tm
= localtime(&tv
.tv_sec
);
1285 if (timestamp_short
) {
1288 strftime(tshort
, sizeof(tshort
), "%Y-%m-%dT%H:%M:%S", tm
);
1289 fprintf(fp
, "[%s.%06ld] ", tshort
, tv
.tv_usec
);
1291 char *tstr
= asctime(tm
);
1293 tstr
[strlen(tstr
)-1] = 0;
1294 fprintf(fp
, "Timestamp: %s %ld usec\n",
1301 unsigned int print_name_and_link(const char *fmt
,
1302 const char *name
, struct rtattr
*tb
[])
1304 const char *link
= NULL
;
1305 unsigned int m_flag
= 0;
1308 if (tb
[IFLA_LINK
]) {
1309 int iflink
= rta_getattr_u32(tb
[IFLA_LINK
]);
1312 if (tb
[IFLA_LINK_NETNSID
]) {
1313 if (is_json_context()) {
1314 print_int(PRINT_JSON
,
1315 "link_index", NULL
, iflink
);
1317 link
= ll_idx_n2a(iflink
);
1320 link
= ll_index_to_name(iflink
);
1322 if (is_json_context()) {
1323 print_string(PRINT_JSON
,
1324 "link", NULL
, link
);
1328 m_flag
= ll_index_to_flags(iflink
);
1329 m_flag
= !(m_flag
& IFF_UP
);
1332 if (is_json_context())
1333 print_null(PRINT_JSON
, "link", NULL
, NULL
);
1339 snprintf(b1
, sizeof(b1
), "%s@%s", name
, link
);
1344 print_color_string(PRINT_ANY
, COLOR_IFNAME
, "ifname", fmt
, name
);
1351 /* Like glibc getline but handle continuation lines and comments */
1352 ssize_t
getcmdline(char **linep
, size_t *lenp
, FILE *in
)
1357 cc
= getline(linep
, lenp
, in
);
1359 return cc
; /* eof or error */
1362 cp
= strchr(*linep
, '#');
1366 while ((cp
= strstr(*linep
, "\\\n")) != NULL
) {
1371 cc1
= getline(&line1
, &len1
, in
);
1373 fprintf(stderr
, "Missing continuation line\n");
1380 cp
= strchr(line1
, '#');
1384 *lenp
= strlen(*linep
) + strlen(line1
) + 1;
1385 *linep
= realloc(*linep
, *lenp
);
1387 fprintf(stderr
, "Out of memory\n");
1392 strcat(*linep
, line1
);
1398 /* split command line into argument vector */
1399 int makeargs(char *line
, char *argv
[], int maxargs
)
1401 static const char ws
[] = " \t\r\n";
1406 /* skip leading whitespace */
1407 cp
+= strspn(cp
, ws
);
1412 if (argc
>= (maxargs
- 1)) {
1413 fprintf(stderr
, "Too many arguments to command\n");
1417 /* word begins with quote */
1418 if (*cp
== '\'' || *cp
== '"') {
1422 /* find ending quote */
1423 cp
= strchr(cp
, quote
);
1425 fprintf(stderr
, "Unterminated quoted string\n");
1431 /* find end of word */
1432 cp
+= strcspn(cp
, ws
);
1437 /* seperate words */
1445 void print_nlmsg_timestamp(FILE *fp
, const struct nlmsghdr
*n
)
1448 time_t secs
= ((__u32
*)NLMSG_DATA(n
))[0];
1449 long usecs
= ((__u32
*)NLMSG_DATA(n
))[1];
1451 tstr
= asctime(localtime(&secs
));
1452 tstr
[strlen(tstr
)-1] = 0;
1453 fprintf(fp
, "Timestamp: %s %lu us\n", tstr
, usecs
);
1456 static int on_netns(char *nsname
, void *arg
)
1458 struct netns_func
*f
= arg
;
1460 if (netns_switch(nsname
))
1463 return f
->func(nsname
, f
->arg
);
1466 static int on_netns_label(char *nsname
, void *arg
)
1468 printf("\nnetns: %s\n", nsname
);
1469 return on_netns(nsname
, arg
);
1472 int do_each_netns(int (*func
)(char *nsname
, void *arg
), void *arg
,
1475 struct netns_func nsf
= { .func
= func
, .arg
= arg
};
1478 return netns_foreach(on_netns_label
, &nsf
);
1480 return netns_foreach(on_netns
, &nsf
);
1483 char *int_to_str(int val
, char *buf
)
1485 sprintf(buf
, "%d", val
);
1489 int get_guid(__u64
*guid
, const char *arg
)
1491 unsigned long int tmp
;
1495 #define GUID_STR_LEN 23
1496 /* Verify strict format: format string must be
1497 * xx:xx:xx:xx:xx:xx:xx:xx where xx can be an arbitrary
1501 if (strlen(arg
) != GUID_STR_LEN
)
1504 /* make sure columns are in place */
1505 for (i
= 0; i
< 7; i
++)
1506 if (arg
[2 + i
* 3] != ':')
1510 for (i
= 0; i
< 8; i
++) {
1511 tmp
= strtoul(arg
+ i
* 3, &endptr
, 16);
1512 if (endptr
!= arg
+ i
* 3 + 2)
1518 *guid
|= tmp
<< (56 - 8 * i
);
1524 /* This is a necessary workaround for multicast route dumps */
1525 int get_real_family(int rtm_type
, int rtm_family
)
1527 if (rtm_type
!= RTN_MULTICAST
)
1530 if (rtm_family
== RTNL_FAMILY_IPMR
)
1533 if (rtm_family
== RTNL_FAMILY_IP6MR
)
1539 /* Based on copy_rtnl_link_stats() from kernel at net/core/rtnetlink.c */
1540 static void copy_rtnl_link_stats64(struct rtnl_link_stats64
*stats64
,
1541 const struct rtnl_link_stats
*stats
)
1543 __u64
*a
= (__u64
*)stats64
;
1544 const __u32
*b
= (const __u32
*)stats
;
1545 const __u32
*e
= b
+ sizeof(*stats
) / sizeof(*b
);
1551 int get_rtnl_link_stats_rta(struct rtnl_link_stats64
*stats64
,
1552 struct rtattr
*tb
[])
1554 struct rtnl_link_stats stats
;
1559 if (tb
[IFLA_STATS64
]) {
1560 rta
= tb
[IFLA_STATS64
];
1561 size
= sizeof(struct rtnl_link_stats64
);
1563 } else if (tb
[IFLA_STATS
]) {
1564 rta
= tb
[IFLA_STATS
];
1565 size
= sizeof(struct rtnl_link_stats
);
1571 len
= RTA_PAYLOAD(rta
);
1573 memset(s
+ len
, 0, size
- len
);
1577 memcpy(s
, RTA_DATA(rta
), len
);
1580 copy_rtnl_link_stats64(stats64
, s
);
1585 size_t strlcpy(char *dst
, const char *src
, size_t size
)
1587 size_t srclen
= strlen(src
);
1590 size_t minlen
= min(srclen
, size
- 1);
1592 memcpy(dst
, src
, minlen
);
1598 size_t strlcat(char *dst
, const char *src
, size_t size
)
1600 size_t dlen
= strlen(dst
);
1603 return dlen
+ strlen(src
);
1605 return dlen
+ strlcpy(dst
+ dlen
, src
, size
- dlen
);
1612 /* don't harmstring root/sudo */
1613 if (getuid() != 0 && geteuid() != 0) {
1616 capabilities
= cap_get_proc();
1619 if (cap_clear(capabilities
) != 0)
1621 if (cap_set_proc(capabilities
) != 0)
1623 cap_free(capabilities
);