1 /* ip.c - Show / manipulate routing, devices, policy routing and tunnels.
2 *
3 * Copyright 2014 Sameer Prakash Pradhan <sameer.p.pradhan@gmail.com>
4 * Copyright 2014 Ranjan Kumar <ranjankumar.bth@gmail.com>
5 * Copyright 2014 Rajni Kant <rajnikant12345@gmail.com>
6 * Copyright 2014 Bilal Qureshi <bilal.jmi@gmail.com>
7 *
8 * No Standard.
9 *
10 USE_IP(NEWTOY(ip, NULL, TOYFLAG_SBIN))
11 USE_IP(OLDTOY(ipaddr, ip, TOYFLAG_SBIN))
12 USE_IP(OLDTOY(iplink, ip, TOYFLAG_SBIN))
13 USE_IP(OLDTOY(iproute, ip, TOYFLAG_SBIN))
14 USE_IP(OLDTOY(iprule, ip, TOYFLAG_SBIN))
15 USE_IP(OLDTOY(iptunnel, ip, TOYFLAG_SBIN))
16
17 config IP
18 bool "ip"
19 default n
20 help
21 usage: ip [ OPTIONS ] OBJECT { COMMAND }
22
23 Show / manipulate routing, devices, policy routing and tunnels.
24
25 where OBJECT := {address | link | route | rule | tunnel}
26 OPTIONS := { -f[amily] { inet | inet6 | link } | -o[neline] }
27 */
28 #define FOR_ip
29 #include "toys.h"
30 #include <linux/netlink.h>
31 #include <linux/rtnetlink.h>
32 #include <linux/if_ether.h>
33 #include <linux/if_addr.h>
34 #include <net/if_arp.h>
35 #include <ifaddrs.h>
36 #include <fnmatch.h>
37 #include <linux/if_tunnel.h>
38
39 #ifndef IP_DF
40 #define IP_DF 0x4000 /* don't fragment flag. */
41 #endif
42
43 GLOBALS(
44 char stats, singleline, flush, *filter_dev, gbuf[8192];
45 int sockfd, connected, from_ok, route_cmd;
46 int8_t addressfamily, is_addr;
47 )
48
49 struct arglist {
50 char *name;
51 int idx;
52 };
53
54 static struct
55 {
56 int ifindex, scope, scopemask, up, to;
57 char *label, *addr;
58 } addrinfo;
59
60 struct linkdata {
61 struct linkdata *next, *prev;
62 int flags, iface_idx, mtu, txqueuelen, parent,iface_type;
63 char qdiscpline[IFNAMSIZ+1], state[IFNAMSIZ+1], type[IFNAMSIZ+1],
64 iface[IFNAMSIZ+1], laddr[64], bcast[64];
65 struct rtnl_link_stats rt_stat;
66 }*linfo;
67
68 typedef int (*cmdobj)(char **argv);
69
70 #define MESG_LEN 8192
71
72 // For "/etc/iproute2/RPDB_tables"
73 enum {
74 RPDB_rtdsfield = 1,
75 RPDB_rtprotos = 2,
76 RPDB_rtrealms = 3,
77 RPDB_rtscopes = 4,
78 RPDB_rttables = 5
79 };
80
81 #define RPDB_ENTRIES 256
82 static int8_t rttable_init;
83 static int8_t rtprotos_init;
84 static int8_t rtdsfield_init;
85 static int8_t rtscope_init;
86 static int8_t rtrealms_init;
87
88 static struct arglist *rt_dsfield[RPDB_ENTRIES];
89 static struct arglist *rt_protos[RPDB_ENTRIES];
90 static struct arglist *rt_tables[RPDB_ENTRIES];
91 static struct arglist *rt_realms[RPDB_ENTRIES];
92 static struct arglist *rt_scope[RPDB_ENTRIES];
93
94 static struct arglist rtmtypes[] = { {"none", RTN_UNSPEC},
95 {"unicast", RTN_UNICAST}, {"local", RTN_LOCAL},
96 {"broadcast", RTN_BROADCAST}, {"anycast", RTN_ANYCAST},
97 {"multicast", RTN_MULTICAST}, {"blackhole", RTN_BLACKHOLE},
98 {"unreachable", RTN_UNREACHABLE}, {"prohibit", RTN_PROHIBIT},
99 {"throw", RTN_THROW}, {"nat", RTN_NAT},
100 {"xresolve", RTN_XRESOLVE}, {NULL, -1}
101 };
102
103 static int filter_nlmesg(int (*fun)(struct nlmsghdr *mhdr, char **), char **);
104 static int ipaddr_print(struct linkdata *, int flg);
105
106 // extended route attribute metrics.
107 static const char *mx_names[RTAX_MAX + 1] = {
108 [RTAX_MTU] = "mtu",
109 [RTAX_WINDOW] = "window",
110 [RTAX_RTT] = "rtt",
111 [RTAX_RTTVAR] = "rttvar",
112 [RTAX_SSTHRESH] = "ssthresh",
113 [RTAX_CWND] = "cwnd",
114 [RTAX_ADVMSS] = "advmss",
115 [RTAX_REORDERING] = "reordering",
116 [RTAX_HOPLIMIT] = "hoplimit",
117 [RTAX_INITCWND] = "initcwnd",
118 [RTAX_FEATURES] = "features",
119 [RTAX_RTO_MIN] = "rto_min",
120 [RTAX_INITRWND] = "initrwnd",
121 [RTAX_QUICKACK] = "quickack",
122 [RTAX_CC_ALGO] = "congctl"};
123
124 // ===========================================================================
125 // Common Code for IP Options (like: addr, link, route etc.)
126 // ===========================================================================
substring_to_idx(char * str,struct arglist * list)127 static int substring_to_idx(char *str, struct arglist *list)
128 {
129 struct arglist *alist;
130 int len;
131
132 if (!str) return -1;
133 len = strlen(str);
134
135 for (alist = list; alist->name; alist++)
136 if (!memcmp(str, alist->name, len)) return alist->idx;
137 return -1;
138 }
139
string_to_idx(char * str,struct arglist * list)140 static int string_to_idx(char *str, struct arglist *list)
141 {
142 struct arglist *alist;
143
144 if (!str) return -1;
145 for (alist = list; alist->name; alist++)
146 if (!strcmp(str, alist->name)) return alist->idx;
147 return -1;
148 }
149
idx_to_string(int idx,struct arglist * list)150 static char *idx_to_string(int idx, struct arglist *list)
151 {
152 struct arglist *alist;
153
154 if (idx < 0) return NULL;
155 for (alist = list; alist->name; alist++)
156 if (idx == alist->idx) return alist->name;
157 return NULL;
158 }
159
send_nlmesg(int type,int flags,int family,void * buf,int blen)160 static void send_nlmesg(int type, int flags, int family,
161 void *buf, int blen)
162 {
163 struct {
164 struct nlmsghdr nlh;
165 struct rtgenmsg g;
166 } req;
167
168 if (!buf) {
169 memset(&req, 0, sizeof(req));
170 req.nlh.nlmsg_len = sizeof(req);
171 req.nlh.nlmsg_type = type;
172 req.nlh.nlmsg_flags = flags;
173 req.g.rtgen_family = family;
174 buf = &req;
175 blen = sizeof(req);
176 }
177 if (send(TT.sockfd , (void*)buf, blen, 0) < 0)
178 perror_exit("Unable to send data on socket.");
179 }
180
181 // Parse /etc/iproute2/RPDB_tables and prepare list.
parseRPDB(char * fname,struct arglist ** list,int32_t size)182 static void parseRPDB(char *fname, struct arglist **list, int32_t size)
183 {
184 char *line;
185 int fd = open(fname, O_RDONLY);
186
187 if (fd < 0) return;
188 for (; (line = get_line(fd)); free(line)) {
189 char *ptr = line;
190 int32_t idx;
191
192 while (*ptr == ' ' || *ptr == '\t') ptr++;
193 if (*ptr == 0 || *ptr == '#' || *ptr == '\n') continue;
194 if ((sscanf(ptr, "0x%x %s\n", &idx, toybuf) != 2) &&
195 (sscanf(ptr, "0x%x %s #", &idx, toybuf) != 2) &&
196 (sscanf(ptr, "%d %s\n", &idx, toybuf) != 2) &&
197 (sscanf(ptr, "%d %s #", &idx, toybuf) != 2)) {
198 error_msg("Corrupted '%s' file", fname);
199 xclose(fd);
200 free(line);
201 return;
202 }
203 if (idx >= 0 && idx < size) {
204 int index = idx & (size-1);
205 if (list[index]) free(list[index]->name);
206 else list[index] = xzalloc(sizeof(struct arglist));
207 list[index]->idx = idx;
208 list[index]->name = xstrdup(toybuf);
209 }
210 }
211 xclose(fd);
212 }
213
free_alist(struct arglist ** list)214 static void free_alist(struct arglist **list)
215 {
216 int i;
217 for (i = 0;i<RPDB_ENTRIES;i++) {
218 if (list[i]) {
219 free(list[i]->name);
220 free(list[i]);
221 }
222 }
223 }
224
init_arglist(struct arglist ** list,int value,char * name)225 static void init_arglist(struct arglist **list,int value, char* name)
226 {
227 if (!list[value]) list[value] = xzalloc(sizeof(struct arglist));
228 list[value]->idx = value;
229 list[value]->name = xstrdup(name);
230 }
231
getlist(u_int8_t whichDB)232 static struct arglist **getlist(u_int8_t whichDB)
233 {
234 struct arglist **alist;
235
236 switch (whichDB) {
237 case RPDB_rtdsfield:
238 alist = rt_dsfield;
239 if (!rtdsfield_init) {
240 rtdsfield_init = 1;
241 parseRPDB("/etc/iproute2/rt_dsfield", alist, ARRAY_LEN(rt_dsfield));
242 }
243 break;
244 case RPDB_rtprotos:
245 alist = rt_protos;
246 if (!rttable_init) {
247 rtprotos_init = 1;
248 init_arglist(rt_protos,0,"none");
249 init_arglist(rt_protos,1,"redirect");
250 init_arglist(rt_protos,2,"kernel");
251 init_arglist(rt_protos,3,"boot");
252 init_arglist(rt_protos,4,"static");
253 init_arglist(rt_protos,8,"gated");
254 init_arglist(rt_protos,9,"ra");
255 init_arglist(rt_protos,10,"mrt");
256 init_arglist(rt_protos,11,"zebra");
257 init_arglist(rt_protos,12,"bird");
258 parseRPDB("/etc/iproute2/rt_protos", alist, ARRAY_LEN(rt_protos));
259 }
260 break;
261 case RPDB_rtrealms:
262 alist = rt_realms;
263 if (!rtrealms_init) {
264 rtrealms_init = 1;
265 init_arglist(rt_realms,0,"unspec");
266 parseRPDB("/etc/iproute2/rt_realms", alist, ARRAY_LEN(rt_realms));
267 }
268 break;
269 case RPDB_rtscopes:
270 alist = rt_scope;
271 if (!rtscope_init) {
272 rtscope_init = 1;
273 init_arglist(rt_scope,0,"global");
274 init_arglist(rt_scope,200,"site");
275 init_arglist(rt_scope,253,"link");
276 init_arglist(rt_scope,254,"host");
277 init_arglist(rt_scope,255,"nowhere");
278 parseRPDB("/etc/iproute2/rt_scopes", alist, ARRAY_LEN(rt_scope));
279 }
280 break;
281 case RPDB_rttables:
282 alist = rt_tables;
283 if (!rttable_init) {
284 rttable_init = 1;
285 init_arglist(rt_tables,RT_TABLE_DEFAULT,"default");
286 init_arglist(rt_tables,RT_TABLE_MAIN,"main");
287 init_arglist(rt_tables,RT_TABLE_LOCAL,"local");
288 parseRPDB("/etc/iproute2/rt_tables", alist, ARRAY_LEN(rt_tables));
289 }
290 break;
291 default:
292 error_exit("wrong database");
293 break; // Unreachable code.
294 }
295 return alist;
296 }
297
298 /*
299 * Parse RPBD tables (if not parsed already).
300 * return RPDB table name as per idx.
301 */
namefromRPDB(int idx,u_int8_t whichDB)302 static char *namefromRPDB(int idx, u_int8_t whichDB)
303 {
304 struct arglist **alist;
305
306 if (idx < 0 || idx >= RPDB_ENTRIES) {
307 snprintf(toybuf, RPDB_ENTRIES, "%u", idx);
308 return toybuf;
309 }
310
311 alist = getlist(whichDB);
312
313 if (alist[idx] && alist[idx]->name) return alist[idx]->name;
314
315 if (whichDB == RPDB_rtdsfield) snprintf(toybuf, RPDB_ENTRIES, "0x%02x", idx);
316 else snprintf(toybuf, RPDB_ENTRIES, "%u", idx);
317
318 return toybuf;
319 }
320
idxfromRPDB(char * name,u_int8_t whichDB)321 static int idxfromRPDB(char *name, u_int8_t whichDB)
322 {
323 struct arglist **alist;
324 long i = 0;
325 char *ptr = NULL;
326
327 for (alist = getlist(whichDB); i < RPDB_ENTRIES; i++) {
328 if (!alist[i] || !alist[i]->name) continue;
329 if (!strcmp(alist[i]->name, name)) return i;
330 }
331 i = strtol(name, &ptr, 0);
332 if (errno || (ptr && *ptr) || i < 0 || i > 255)
333 return -1;
334 return i;
335 }
336
rtmtype_idx2str(u_int8_t idx)337 static char *rtmtype_idx2str(u_int8_t idx)
338 {
339 char *name = idx_to_string(idx, rtmtypes);
340
341 if (!name) snprintf(toybuf, RPDB_ENTRIES, "%u", idx);
342 else snprintf(toybuf, sizeof(toybuf), "%s", name);
343 return toybuf;
344 }
345
rtmtype_str2idx(char * name)346 static int rtmtype_str2idx(char *name)
347 {
348 int idx = string_to_idx(name, rtmtypes);
349
350 if (idx < 0) return atolx_range(name, 0, 255);
351 return idx;
352 }
353
354 /*
355 * Used to get the prefix value in binary form.
356 * For IPv4: non-standard parsing used; as 10.10 will be treated as 10.10.0.0
357 * unlike inet_aton which is 10.0.0.10
358 */
get_prefix(uint32_t * addr,uint8_t * af,char * name,int family)359 static int get_prefix(uint32_t *addr, uint8_t *af, char *name, int family)
360 {
361 if (family == AF_PACKET) error_exit("'%s' may be inet prefix", name);
362 if (!memcmp(name, "default", strlen(name))
363 || !memcmp(name, "all", strlen(name))
364 || !memcmp(name, "any", strlen(name))) {
365 *af = family;
366 return 0;
367 }
368 if (strchr(name, ':')) {
369 *af = AF_INET6;
370 if (family != AF_UNSPEC && family != AF_INET6) return 1;
371 if (inet_pton(AF_INET6, name, (void *)addr) != 1)
372 return 1;
373 } else { // for IPv4.
374 char *ptr = name;
375 uint8_t count = 0;
376
377 *af = AF_INET;
378 if (family != AF_UNSPEC && family != AF_INET) return 1;
379 while (*ptr) {
380 int val, len = 0;
381
382 if (*ptr == '.') ptr++;
383 sscanf(ptr, "%d%n", &val, &len);
384 if (!len || len > 3 || val < 0 || val > 255 || count > 3) return 1;
385 ptr += len;
386 ((uint8_t*)addr)[count++] = val;
387 }
388 }
389 return 0;
390 }
391
392 /*
393 * Used to calculate netmask, which can be in the form of
394 * either 255.255.255.0 or 24 or default or any or all strings.
395 */
get_nmask_prefix(uint32_t * netmask,uint8_t af,char * name,uint8_t family)396 static int get_nmask_prefix(uint32_t *netmask, uint8_t af,
397 char *name, uint8_t family)
398 {
399 char *ptr;
400 uint32_t naddr[4] = {0,};
401 uint64_t plen;
402 uint8_t naf = AF_UNSPEC;
403
404 *netmask = (af == AF_INET6) ? 128 : 32; // set default netmask
405 plen = strtoul(name, &ptr, 0);
406
407 if (!ptr || ptr == name || *ptr || !plen || plen > *netmask) {
408 if (get_prefix(naddr, &naf, name, family)) return -1;
409 if (naf == AF_INET) {
410 uint32_t mask = htonl(*naddr), host = ~mask;
411 if (host & (host + 1)) return -1;
412 for (plen = 0; mask; mask <<= 1) ++plen;
413 if (plen > 32) return -1;
414 }
415 }
416 *netmask = plen;
417 return 0;
418 }
419
420 /*
421 * Parse prefix, which will be in form of
422 * either default or default/default or default/24 or default/255.255.255.0
423 * or 10.20.30.40 or 10.20.30.40/default or 10.20.30.40/24
424 * or 10.20.30.40/255.255.255.0
425 */
parse_prefix(uint32_t * addr,uint32_t * netmask,uint8_t * len,char * name,int family)426 static void parse_prefix(uint32_t *addr, uint32_t *netmask, uint8_t *len,
427 char *name, int family)
428 {
429 uint8_t af = AF_UNSPEC;
430 char *slash = strchr(name, '/');
431
432 if (slash) *slash = 0;
433 if (get_prefix(addr, &af, name, family)) error_exit("Invalid prefix");
434
435 if (slash) { // grab netmask.
436 if (get_nmask_prefix(netmask, af, slash+1, family))
437 error_exit("Invalid prefix");
438 *slash ='/';
439 }
440 else if (af == AF_INET && *addr) *netmask = 32;
441 else if (af == AF_INET6 && (*addr || *(addr+3))) *netmask = 128;
442
443 if (!*addr && !slash && !af) *len = 0;
444 else *len = (af == AF_INET6) ? 16 : 4;
445 }
446
447 /*
448 * Add a route attribute to a buffer; this is primarily used for extended
449 * attributes which get collected in a separate buffer from the normal route
450 * attributes and later get added to the main rtm message.
451 */
add_varlen_rtattr_to_buffer(struct rtattr * rta,int maxlen,int type,void * data,int alen)452 static void add_varlen_rtattr_to_buffer(struct rtattr *rta, int maxlen,
453 int type, void *data, int alen) {
454 struct rtattr *subrta;
455 int len = RTA_LENGTH(alen);
456 if (RTA_ALIGN(rta->rta_len) + RTA_ALIGN(len) > maxlen) {
457 error_exit("RTA exceeds max length %d", maxlen);
458 }
459 subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len));
460 subrta->rta_type = type;
461 subrta->rta_len = len;
462 if (alen) {
463 memcpy(RTA_DATA(subrta), data, alen);
464 }
465 rta->rta_len = NLMSG_ALIGN(rta->rta_len) + RTA_ALIGN(len);
466 }
467
add_uint32_rtattr_to_buffer(struct rtattr * rta,int maxlen,int type,uint32_t attr)468 static void add_uint32_rtattr_to_buffer(struct rtattr *rta, int maxlen,
469 int type, uint32_t attr) {
470 add_varlen_rtattr_to_buffer(rta, maxlen, type, (char*)&attr, sizeof(attr));
471 }
472
473 /*
474 * Add a route attribute to a RTM message.
475 */
add_string_to_rtattr(struct nlmsghdr * n,int maxlen,int type,void * data,int alen)476 static void add_string_to_rtattr(struct nlmsghdr *n, int maxlen,
477 int type, void *data, int alen)
478 {
479 int len = RTA_LENGTH(alen);
480 struct rtattr *rta;
481
482 if ((int)(NLMSG_ALIGN(n->nlmsg_len) + len) > maxlen) return;
483 rta = (struct rtattr*)(((char*)n) + NLMSG_ALIGN(n->nlmsg_len));
484 rta->rta_type = type;
485 rta->rta_len = len;
486 memcpy(RTA_DATA(rta), data, alen);
487 n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + len;
488 }
489
490
491
492 // ===========================================================================
493 // Code for ip link.
494 // ===========================================================================
495 #ifndef NLMSG_TAIL
496 #define NLMSG_TAIL(nmsg) \
497 ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
498 #endif
499
get_ifaceindex(char * name,int ext)500 static uint32_t get_ifaceindex(char *name, int ext)
501 {
502 struct if_nameindex *if_ni, *i;
503 int index = -1;
504
505 if_ni = if_nameindex();
506 if (!if_ni) perror_exit("if_nameindex");
507
508 for (i = if_ni; i->if_index && i->if_name; i++)
509 if (!strcmp(name, i->if_name)) {
510 index = i->if_index;
511 break;
512 }
513 if_freenameindex(if_ni);
514 if (index == -1 && ext) perror_exit("can't find device '%s'", name);
515 return index;
516 }
517
fill_hwaddr(char * arg,int len,unsigned char * address)518 static void fill_hwaddr(char *arg, int len, unsigned char *address)
519 {
520 int count = 0, val, length;
521
522 while (count < len) {
523 val = length = 0;
524 if (!arg) error_exit("bad hw-addr '%s'", "");
525 if (*arg == ':') arg++, count++;
526 sscanf(arg, "%2x%n", &val, &length);
527 if (!length || length > 2)
528 error_exit("bad hw-addr '%s'", arg);
529 arg += length;
530 count += length;
531 *address++ = val;
532 }
533 }
534
535 // Multimach = 1, single match = 0
get_flag_string(struct arglist * aflags,int flags,int ismulti)536 static char *get_flag_string(struct arglist *aflags, int flags, int ismulti)
537 {
538 struct arglist *p = aflags;
539 char *out = NULL, *tmp = NULL;
540
541 for (; p->name; p++) {
542 int test = (ismulti ? p->idx & flags : 0) || p->idx == flags;
543 if (test) { // flags can be zero
544 tmp = out ? xmprintf("%s,%s", out, p->name) : xmprintf("%s", p->name);
545 if (out) free(out);
546 out = tmp;
547 }
548 }
549 return out;
550 }
551
vlan_parse_opt(char ** argv,struct nlmsghdr * n,unsigned int size)552 static void vlan_parse_opt(char **argv, struct nlmsghdr *n, unsigned int size)
553 {
554 struct arglist vlan_optlist[] = {{"id", 0}, {"protocol", 1},
555 {"reorder_hdr", 2}, {"gvrp", 3}, {NULL,-1}};
556 struct arglist vlan_protolist[] = {{"802.1q", 0}, {"802.1ad", 1}, {NULL,-1}};
557 struct arglist on_off[] = { {"on", 0}, {"off", 1}, {NULL,-1}};
558 int idx;
559 struct ifla_vlan_flags flags;
560
561 memset(&flags, 0, sizeof(flags));
562 for (; *argv; argv++) {
563 int param, proto;
564
565 if ((idx = substring_to_idx(*argv++, vlan_optlist)) == -1) help_exit(0);
566 switch (idx) {
567 case 0: // ARG_id
568 if (!*argv) help_exit(0);
569 param = atolx(*argv);
570 add_string_to_rtattr(n, size, IFLA_VLAN_ID, ¶m, sizeof(param));
571 break;
572 case 1: // ARG_protocol
573 if (!*argv) error_exit("Invalid vlan id.");
574 if ((idx = substring_to_idx(*argv, vlan_protolist)) == -1) help_exit(0);
575 if (!idx) proto = ETH_P_8021Q; // PROTO_8021Q - 0
576 else if (idx == 1) proto = 0x88A8; // ETH Protocol - 8021AD
577 // IFLA VLAN PROTOCOL - 5
578 add_string_to_rtattr(n, size, 5, &proto, sizeof(proto));
579 break;
580 case 2: // ARG_reorder_hdr
581 case 3: // ARG_gvrp
582 if ((param = substring_to_idx(*argv, on_off)) == -1) help_exit(0);
583
584 flags.mask |= (idx -1); // VLAN FLAG REORDER Header
585 flags.flags &= ~(idx -1); // VLAN FLAG REORDER Header
586 if (!param) flags.flags |= (idx -1); // VLAN FLAG REORDER Header
587 break;
588 }
589 }
590 if (flags.mask)
591 add_string_to_rtattr(n, size, IFLA_VLAN_FLAGS, &flags, sizeof(flags));
592 }
593
linkupdate(char ** argv)594 static int linkupdate(char **argv)
595 {
596 struct {
597 struct nlmsghdr mhdr;
598 struct ifinfomsg info;
599 char buf[1024];
600 } request;
601 char *name, *dev, *type, *link, *addr;
602 struct rtattr *attr = NULL;
603 int len = 0, add = (*argv[-1] == 'a') ? 1 : 0;
604
605 name = dev = type = link = addr = NULL;
606 for (; *argv; argv++) {
607 struct arglist objectlist[] = { {"type", 0}, {"name", 1}, {"link", 2},
608 {"address", 3}, {NULL,-1}};
609 uint8_t idx = substring_to_idx(*argv, objectlist);
610
611 if (!idx) {
612 type = *++argv;
613 break;
614 }
615 else if (idx == 1) dev = name = *++argv;
616 else if (idx == 2) link = *++argv;
617 else if (idx == 3) addr = *++argv;
618 else if (!dev) name = dev = *argv;
619 }
620
621 if (!name && !add)
622 error_exit("Not enough information: \"dev\" argument is required.\n");
623 else if (!type && add)
624 error_exit("Not enough information: \"type\" argument is required.\n");
625
626 memset(&request, 0, sizeof(request));
627 request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
628 request.mhdr.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
629 if (add) {
630 request.mhdr.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
631 request.mhdr.nlmsg_type = RTM_NEWLINK;
632 } else {
633 request.mhdr.nlmsg_type = RTM_DELLINK;
634 request.info.ifi_index = get_ifaceindex(name, 1);
635 }
636 request.info.ifi_family = AF_UNSPEC;
637 attr = NLMSG_TAIL(&request.mhdr);
638 if (type) {
639 add_string_to_rtattr(&request.mhdr, sizeof(request),
640 IFLA_LINKINFO, NULL, 0);
641 add_string_to_rtattr(&request.mhdr, sizeof(request),
642 IFLA_INFO_KIND, type, strlen(type));
643 if (!strcmp(type, "vlan")) {
644 struct rtattr *data = NLMSG_TAIL(&request.mhdr);
645 add_string_to_rtattr(&request.mhdr, sizeof(request),
646 IFLA_INFO_DATA, NULL, 0);
647 vlan_parse_opt(++argv, &request.mhdr, sizeof(request));
648 data->rta_len = (void *)NLMSG_TAIL(&request.mhdr) - (void *)data;
649 }
650 attr->rta_len = (void *)NLMSG_TAIL(&request.mhdr) - (void *)attr;
651 }
652
653 if (link) {
654 uint32_t idx = get_ifaceindex(link, 1);
655 add_string_to_rtattr(&request.mhdr, sizeof(request),
656 IFLA_LINK, &idx, sizeof(uint32_t));
657 }
658 if (addr) {
659 char abuf[IF_NAMESIZE] = {0,};
660
661 fill_hwaddr(addr, IF_NAMESIZE, (unsigned char *)abuf);
662 add_string_to_rtattr(&request.mhdr, sizeof(request),
663 IFLA_ADDRESS, abuf, strlen(abuf));
664 }
665 if (!name) {
666 snprintf(toybuf, IFNAMSIZ, "%s%d", type, 0);
667 for (len = 1; ; len++) {
668 if (!get_ifaceindex(toybuf, 0)) break;
669 snprintf(toybuf, IFNAMSIZ, "%s%d", type, len);
670 }
671 name = toybuf;
672 }
673 len = strlen(name) + 1;
674 if (len < 2 || len > IFNAMSIZ) error_exit("Invalid device name.");
675 add_string_to_rtattr(&request.mhdr, sizeof(request), IFLA_IFNAME, name, len);
676
677 send_nlmesg(0, 0, 0, (void *)&request, request.mhdr.nlmsg_len);
678 return (filter_nlmesg(NULL,NULL));
679 }
680
link_set(char ** argv)681 static int link_set(char **argv)
682 {
683 struct arglist cmd_objectlist[] = {{"up", 0}, {"down", 1}, {"arp", 2},
684 {"multicast", 3}, {"dynamic", 4}, {"name", 5}, {"txqueuelen", 6},
685 {"mtu", 7},{"address", 8}, {"broadcast", 9}, {NULL,-1}};
686 int case_flags[] = {IFF_NOARP,IFF_MULTICAST,IFF_DYNAMIC};
687 struct ifreq req;
688 int idx, flags = 0, masks = 0xffff, fd;
689
690 memset(&req, 0, sizeof(req));
691 if (!*argv) error_exit("\"dev\" missing");
692 xstrncpy(req.ifr_name, *argv, IF_NAMESIZE);
693 fd = xsocket(AF_INET, SOCK_DGRAM, 0);
694 xioctl(fd, SIOCGIFINDEX, &req);
695 for (++argv; *argv;) {
696 if ((idx = substring_to_idx(*argv++, cmd_objectlist)) == -1) help_exit(0);
697 switch(idx) {
698 case 0:
699 flags |= IFF_UP; break;
700 case 1:
701 masks &= ~IFF_UP; break;
702 case 2:
703 case 3:
704 case 4:
705 if (!*argv) help_exit(0);
706 else if (!strcmp(*argv, "on")) {
707 if (idx == 2) {
708 masks &= ~case_flags[idx-2];
709 flags &= ~case_flags[idx-2];
710 } else flags |= case_flags[idx-2];
711 } else if (!strcmp(*argv,"off")) {
712 if (idx == 2) {
713 masks |= case_flags[idx-2];
714 flags |= case_flags[idx-2];
715 } else masks &= ~case_flags[idx-2];
716 } else help_exit(0);
717 ++argv;
718 break;
719 case 5:
720 xstrncpy(req.ifr_ifru.ifru_newname, *argv, IF_NAMESIZE);
721 xioctl(fd, SIOCSIFNAME, &req);
722 xstrncpy(req.ifr_name, *argv++, IF_NAMESIZE);
723 xioctl(fd, SIOCGIFINDEX, &req);
724 break;
725 case 6:
726 req.ifr_ifru.ifru_ivalue = atolx(*argv++);
727 xioctl(fd, SIOCSIFTXQLEN, &req);
728 break;
729 case 7:
730 req.ifr_ifru.ifru_mtu = atolx(*argv++);
731 xioctl(fd, SIOCSIFMTU, &req);
732 break;
733 case 8:
734 xioctl(fd, SIOCGIFHWADDR, &req);
735 fill_hwaddr(*argv++, IF_NAMESIZE,
736 (unsigned char *)(req.ifr_hwaddr.sa_data));
737 xioctl(fd, SIOCSIFHWADDR, &req);
738 break;
739 case 9:
740 xioctl(fd, SIOCGIFHWADDR, &req);
741 fill_hwaddr(*argv++, IF_NAMESIZE,
742 (unsigned char *)(req.ifr_hwaddr.sa_data));
743 xioctl(fd, SIOCSIFHWBROADCAST, &req);
744 break;
745 }
746 }
747 xioctl(fd, SIOCGIFFLAGS, &req);
748 req.ifr_ifru.ifru_flags |= flags;
749 req.ifr_ifru.ifru_flags &= masks;
750 xioctl(fd, SIOCSIFFLAGS, &req);
751 xclose(fd);
752 return 0;
753 }
754
print_stats(struct rtnl_link_stats * rtstat)755 static void print_stats(struct rtnl_link_stats *rtstat)
756 {
757 char *line_feed = (!TT.singleline ? "\n " : " ");
758
759 if (TT.stats > 0) {
760 xprintf(" RX: bytes packets errors "
761 "dropped overrun mcast%s%-10u %-8u %-7u %-8u %-8u %-8u\n",
762 line_feed, rtstat->rx_bytes, rtstat->rx_packets, rtstat->rx_errors,
763 rtstat->rx_dropped, rtstat->rx_over_errors, rtstat->multicast);
764 if (TT.stats > 1) {
765 xprintf(" RX: errors length crc "
766 "frame fifo missed%s%-10u %-8u %-7u %-8u %-8u %-8u\n",
767 line_feed, rtstat->rx_errors, rtstat->rx_length_errors,
768 rtstat->rx_crc_errors, rtstat->rx_frame_errors,
769 rtstat->rx_fifo_errors, rtstat->rx_missed_errors);
770 }
771 xprintf(" TX: bytes packets errors "
772 "dropped carrier collsns%s%-10u %-8u %-7u %-8u %-8u %-8u\n",
773 line_feed, rtstat->tx_bytes, rtstat->tx_packets, rtstat->tx_errors,
774 rtstat->tx_dropped, rtstat->tx_carrier_errors, rtstat->collisions);
775 if (TT.stats > 1) {
776 xprintf(" TX: errors aborted fifo window "
777 "heartbeat%s%-10u %-8u %-7u %-8u %-8u\n",
778 line_feed, rtstat->tx_errors, rtstat->tx_aborted_errors,
779 rtstat->tx_fifo_errors, rtstat->tx_window_errors,
780 rtstat->tx_heartbeat_errors);
781 }
782 }
783 }
784
print_link_output(struct linkdata * link)785 static int print_link_output(struct linkdata *link)
786 {
787 char *line_feed = " ", *flags,*peer = "brd";
788 struct arglist iface_flags[] = {{"",0},{"UP", IFF_UP},
789 {"BROADCAST", IFF_BROADCAST}, {"DEBUG", IFF_DEBUG},
790 {"LOOPBACK", IFF_LOOPBACK}, {"POINTOPOINT", IFF_POINTOPOINT},
791 {"NOTRAILERS", IFF_NOTRAILERS}, {"RUNNING", IFF_RUNNING},
792 {"NOARP", IFF_NOARP}, {"PROMISC",IFF_PROMISC},
793 {"ALLMULTI", IFF_ALLMULTI}, {"MASTER", IFF_MASTER}, {"SLAVE", IFF_SLAVE},
794 {"MULTICAST", IFF_MULTICAST}, {"PORTSEL", IFF_PORTSEL},
795 {"AUTOMEDIA", IFF_AUTOMEDIA}, {"DYNAMIC", IFF_DYNAMIC}, {NULL,-1}};
796
797 if (link->parent != -1) {
798 int fd = 0;
799 struct ifreq req;
800
801 memset(&req, 0, sizeof(req));
802 if_indextoname( link->parent,req.ifr_ifrn.ifrn_name);
803 fd = xsocket(AF_INET, SOCK_DGRAM, 0);
804 if (ioctl(fd, SIOCGIFTXQLEN, &req)) perror("");
805 else link->txqueuelen = req.ifr_ifru.ifru_ivalue;
806 xclose(fd);
807 }
808
809 if (TT.is_addr && addrinfo.label && fnmatch(addrinfo.label, link->iface, 0))
810 return 0;
811
812
813 if (!(flags = get_flag_string(iface_flags, link->flags, 1)))
814 error_exit("Invalid data.");
815 if (!TT.singleline) line_feed="\n ";
816 if (link->parent != -1) {
817 char iface[IF_NAMESIZE];
818
819 if (!if_indextoname(link->parent, iface)) perror_exit(NULL);
820 sprintf(toybuf,"%s@%s", link->iface, iface);
821 }
822 if (link->flags & IFF_POINTOPOINT) peer = "peer";
823 if (TT.is_addr && TT.singleline && TT.addressfamily)
824 xprintf("%d: %s", link->iface_idx,
825 ((link->parent == -1) ? link->iface : toybuf));
826 else xprintf("%d: %s: <%s> mtu %d qdisc %s state %s qlen %d",
827 link->iface_idx, ((link->parent == -1) ? link->iface : toybuf), flags,
828 link->mtu, link->qdiscpline, link->state, link->txqueuelen);
829
830 if (!TT.addressfamily || TT.addressfamily == AF_PACKET)
831 xprintf("%slink/%s %s %s %s",
832 line_feed, link->type, link->laddr, peer ,link->bcast);
833
834 xputc('\n');
835
836 //user can specify stats flag two times
837 //one for stats and other for erros e.g. -s and -s -s
838 print_stats(&link->rt_stat);
839 free(flags);
840
841 return 0;
842 }
843
fill_address(void * p,char * ip)844 static void fill_address(void *p, char *ip)
845 {
846 unsigned char *ptr = (unsigned char*)p;
847 snprintf(ip, 64, " %02x:%02x:%02x:%02x:%02x:%02x",
848 ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5]);
849 }
850
get_link_info(struct nlmsghdr * h,struct linkdata * link,char ** argv)851 static int get_link_info(struct nlmsghdr* h,struct linkdata* link,char **argv)
852 {
853 struct ifinfomsg *iface = NLMSG_DATA(h);
854 struct rtattr *attr = IFLA_RTA(iface);
855 int len = h->nlmsg_len - NLMSG_LENGTH(sizeof(*iface));
856 struct arglist hwtypes[]={{"generic",0},{"ether",ARPHRD_ETHER},
857 {"loopback", ARPHRD_LOOPBACK},{"sit",ARPHRD_SIT},
858 #ifdef ARPHRD_INFINIBAND
859 {"infiniband",ARPHRD_INFINIBAND},
860 #endif
861 #ifdef ARPHRD_IEEE802_TR
862 {"ieee802",ARPHRD_IEEE802}, {"tr",ARPHRD_IEEE802_TR},
863 #else
864 {"tr",ARPHRD_IEEE802},
865 #endif
866 #ifdef ARPHRD_IEEE80211
867 {"ieee802.11",ARPHRD_IEEE80211},
868 #endif
869 #ifdef ARPHRD_IEEE1394
870 {"ieee1394",ARPHRD_IEEE1394},
871 #endif
872 {"irda",ARPHRD_IRDA},{"slip",ARPHRD_SLIP},{"cslip",ARPHRD_CSLIP},
873 {"slip6",ARPHRD_SLIP6}, {"cslip6",ARPHRD_CSLIP6}, {"ppp",ARPHRD_PPP},
874 {"ipip",ARPHRD_TUNNEL}, {"tunnel6",ARPHRD_TUNNEL6},
875 {"gre",ARPHRD_IPGRE},
876 #ifdef ARPHRD_VOID
877 {"void",ARPHRD_VOID},
878 #endif
879 {NULL,-1}};
880 char *lname = get_flag_string(hwtypes, iface->ifi_type, 0);
881
882 link->next = link->prev = 0;
883 link->iface_type = iface->ifi_type;
884 if (!lname) error_exit("Invalid link.");
885 xstrncpy(link->type, lname, IFNAMSIZ);
886 free(lname);
887 link->iface_idx = iface->ifi_index;
888 link->flags = iface->ifi_flags;
889 if (*argv && !strcasecmp("up",*argv) && !(link->flags & IFF_UP)) return 1;
890 link->parent = -1;
891 for (; RTA_OK(attr, len); attr = RTA_NEXT(attr, len)) {
892 switch(attr->rta_type) {
893 case IFLA_IFNAME:
894 snprintf(link->iface, IFNAMSIZ, "%s",(char *) RTA_DATA(attr));
895 break;
896 case IFLA_ADDRESS:
897 if ( iface->ifi_type== ARPHRD_TUNNEL ||
898 iface->ifi_type == ARPHRD_SIT ||
899 iface->ifi_type == ARPHRD_IPGRE)
900 inet_ntop(AF_INET, RTA_DATA(attr), link->laddr, 64);
901 else fill_address(RTA_DATA(attr), link->laddr);
902 break;
903 case IFLA_BROADCAST:
904 if (iface->ifi_type== ARPHRD_TUNNEL ||
905 iface->ifi_type == ARPHRD_SIT ||
906 iface->ifi_type == ARPHRD_IPGRE)
907 inet_ntop(AF_INET, RTA_DATA(attr), link->bcast, 64);
908 else fill_address(RTA_DATA(attr), link->bcast);
909 break;
910 case IFLA_MTU:
911 link->mtu = *((int*)(RTA_DATA(attr)));
912 break;
913 case IFLA_QDISC:
914 snprintf(link->qdiscpline, IFNAMSIZ, "%s", (char *) RTA_DATA(attr));
915 break;
916 case IFLA_STATS :
917 link->rt_stat = *((struct rtnl_link_stats*) RTA_DATA(attr));
918 break;
919 case IFLA_LINK:
920 link->parent = *((int*)(RTA_DATA(attr)));
921 break;
922 case IFLA_TXQLEN:
923 link->txqueuelen = *((int*)(RTA_DATA(attr)));
924 break;
925 case IFLA_OPERSTATE:
926 {
927 struct arglist flags[]={{"UNKNOWN", 0}, {"NOTPRESENT", 1},
928 {"DOWN", 2}, {"LOWERLAYERDOWN", 3}, {"TESTING", 4},
929 {"DORMANT", 5}, {"UP", 6}, {NULL, -1}};
930 if (!(lname = get_flag_string(flags, *((int*)(RTA_DATA(attr))), 0)))
931 error_exit("Invalid state.");
932 xstrncpy(link->state, lname,IFNAMSIZ);
933 free(lname);
934 }
935 break;
936 default: break;
937 }
938 }
939 return 0;
940 }
941
display_link_info(struct nlmsghdr * mhdr,char ** argv)942 static int display_link_info(struct nlmsghdr *mhdr, char **argv)
943 {
944 struct linkdata link;
945
946 if (!get_link_info(mhdr, &link, argv)) {
947 if (TT.is_addr) {
948 struct linkdata *lnk = xzalloc(sizeof(struct linkdata));
949 memcpy(lnk, &link, sizeof(struct linkdata));
950 dlist_add_nomalloc((struct double_list **)&linfo,
951 (struct double_list *)lnk);
952 }
953 else print_link_output(&link);
954 }
955 return 0;
956 }
957
link_show(char ** argv)958 static int link_show(char **argv)
959 {
960 struct {
961 struct nlmsghdr mhdr;
962 struct ifinfomsg info;
963 } request;
964 uint32_t index = 0;
965
966 if (*argv && strcasecmp("up",*argv)) index = get_ifaceindex(*argv, 1);
967 memset(&request, 0, sizeof(request));
968 request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
969 request.mhdr.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
970 if (!index) request.mhdr.nlmsg_flags |= NLM_F_ROOT|NLM_F_MATCH;
971 else request.info.ifi_change = 0xffffffff; // used in single operation
972 request.mhdr.nlmsg_type = RTM_GETLINK;
973 request.info.ifi_index = index;
974 request.info.ifi_family = AF_UNSPEC;
975 send_nlmesg(0, 0, 0, (void*)&request, sizeof(request));
976 return (filter_nlmesg(display_link_info, argv));
977 }
978
iplink(char ** argv)979 static int iplink(char **argv)
980 {
981 int idx;
982 cmdobj ipcmd, cmdobjlist[] = {linkupdate, link_set, link_show};
983 struct arglist cmd_objectlist[] = {{"add", 0}, {"delete", 0},
984 {"set", 1}, {"show", 2}, {"list", 2}, {"lst", 2}, {NULL,-1}};
985
986 if (!*argv) idx = 2;
987 else if ((idx = substring_to_idx(*argv++, cmd_objectlist)) == -1)
988 help_exit(0);
989 ipcmd = cmdobjlist[idx];
990 return ipcmd(argv);
991 }
992
993 // ===========================================================================
994 // Code for ip addr.
995 // ===========================================================================
996
print_addrinfo(struct nlmsghdr * h,int flag_l)997 static int print_addrinfo(struct nlmsghdr *h, int flag_l)
998 {
999 struct rtattr *rta, *rta_tb[IFA_MAX+1] = {0,};
1000 char *family = toybuf, *scope = toybuf+256, *label = toybuf+512,
1001 *brd = toybuf+768, *peer = toybuf+1024, *any = toybuf+1280,
1002 lbuf[INET6_ADDRSTRLEN] = {0,}, lbuf_ifa[INET6_ADDRSTRLEN] = {0,};
1003 struct ifaddrmsg *ifa = NLMSG_DATA(h);
1004 int len;
1005
1006 if ((len = h->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa))) < 0) {
1007 error_msg("wrong nlmsg len %d", len);
1008 return 0;
1009 }
1010
1011 for (rta = IFA_RTA(ifa); RTA_OK(rta, len); rta=RTA_NEXT(rta, len))
1012 if (rta->rta_type <= IFA_MAX) rta_tb[rta->rta_type] = rta;
1013
1014 if (!rta_tb[IFA_LOCAL]) rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
1015 if (!rta_tb[IFA_ADDRESS]) rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
1016 if ((addrinfo.scope ^ ifa->ifa_scope)&addrinfo.scopemask) return 0;
1017 if (addrinfo.ifindex && addrinfo.ifindex != ifa->ifa_index) return 0;
1018
1019 if (flag_l && addrinfo.label && ifa->ifa_family == AF_INET6) return 0;
1020 if ((rta_tb[IFA_LABEL])) {
1021 xstrncpy(label, RTA_DATA(rta_tb[IFA_LABEL]), 256);
1022 label[255] = '\0';
1023 if (addrinfo.label && fnmatch(addrinfo.label, label, 0))
1024 return 0;
1025 }
1026
1027 if (TT.flush) {
1028 if (ifa->ifa_index == addrinfo.ifindex) {
1029 h->nlmsg_type = RTM_DELADDR;
1030 h->nlmsg_flags = NLM_F_REQUEST;
1031 send_nlmesg(RTM_DELADDR, 0, 0, h, h->nlmsg_len);
1032 return 0;
1033 }
1034 }
1035
1036 if (h->nlmsg_type == RTM_DELADDR) printf("Deleted ");
1037
1038 if (TT.singleline) {
1039 if (!if_indextoname(ifa->ifa_index, lbuf)) perror_exit(NULL);
1040 printf("%u: %s",ifa->ifa_index, lbuf);
1041 }
1042
1043 sprintf(scope, " scope %s ", namefromRPDB(ifa->ifa_scope, RPDB_rtscopes));
1044
1045 if (ifa->ifa_family == AF_INET) strcpy(family, " inet ");
1046 else if (ifa->ifa_family == AF_INET6) strcpy(family, " inet6 ");
1047 else sprintf(family, " family %d", ifa->ifa_family);
1048
1049 if (rta_tb[IFA_LOCAL]) {
1050 if (!inet_ntop(ifa->ifa_family, RTA_DATA(rta_tb[IFA_LOCAL]),
1051 lbuf, sizeof(lbuf))) perror_exit("inet");
1052
1053 sprintf(family+strlen(family), lbuf, strlen(lbuf));
1054 if (!rta_tb[IFA_ADDRESS] || !memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]),
1055 RTA_DATA(rta_tb[IFA_LOCAL]), 4))
1056 sprintf(family+strlen(family), "/%d ", ifa->ifa_prefixlen);
1057 else {
1058 if (!inet_ntop(ifa->ifa_family, RTA_DATA(rta_tb[IFA_ADDRESS]),
1059 lbuf_ifa, sizeof(lbuf_ifa))) perror_exit("inet");
1060 sprintf(peer, " peer %s/%d ", lbuf_ifa, ifa->ifa_prefixlen);
1061 }
1062 }
1063
1064 if (addrinfo.to && strcmp(addrinfo.addr, lbuf))
1065 return 0;
1066
1067 if (rta_tb[IFA_BROADCAST]) {
1068 if (!inet_ntop(ifa->ifa_family, RTA_DATA(rta_tb[IFA_BROADCAST]),
1069 lbuf, sizeof(lbuf))) perror_exit("inet");
1070 sprintf(brd, " brd %s", lbuf);
1071 }else brd = "";
1072
1073 if (rta_tb[IFA_ANYCAST]) {
1074 if (!inet_ntop(ifa->ifa_family, RTA_DATA(rta_tb[IFA_ANYCAST]),
1075 lbuf, sizeof(lbuf))) perror_exit("inet");
1076 sprintf(any, " any %s", lbuf);
1077 }
1078
1079 if (ifa->ifa_family == AF_INET)
1080 printf("%s%s%s%s%s %c", family, brd, peer, scope, label,
1081 (TT.singleline? '\0' : '\n'));
1082 else printf("%s%s %c", family, scope, (TT.singleline? '\0' : '\n'));
1083 if (TT.singleline && (ifa->ifa_family == AF_INET)) xputc('\n');
1084
1085 if (rta_tb[IFA_CACHEINFO]) {
1086 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
1087
1088 printf("%c valid_lft ", (TT.singleline? '\\' : '\0'));
1089 if (ci->ifa_valid == 0xFFFFFFFFU) printf("forever");
1090 else printf("%usec", ci->ifa_valid);
1091 printf(" preferred_lft ");
1092 if (ci->ifa_prefered == 0xFFFFFFFFU) printf("forever");
1093 else printf("%dsec", ci->ifa_prefered);
1094 xputc('\n');
1095 }
1096 return 0;
1097 }
1098
ipaddrupdate(char ** argv)1099 static int ipaddrupdate(char **argv)
1100 {
1101 int length, cmd = !memcmp("add", argv[-1], strlen(argv[-1]))
1102 ? RTM_NEWADDR: RTM_DELADDR;
1103 int idx = 0,length_brd = 0, length_peer = 0,length_any = 0,length_local = 0,
1104 scoped = 0;
1105 char *dev = NULL,*label = NULL, reply[8192];
1106
1107 struct nlmsghdr *addr_ptr = NULL;
1108 struct nlmsgerr *err = NULL;
1109 struct arglist cmd_objectlist[] = {{"dev",0}, {"peer", 1},
1110 {"remote", 2}, {"broadcast", 3}, {"brd", 4}, {"label", 5},
1111 {"anycast", 6},{"scope", 7}, {"local", 8}, {NULL, -1}};
1112 struct {
1113 struct nlmsghdr nlm;
1114 struct ifaddrmsg ifadd;
1115 char buf[256];
1116 } req;
1117 typedef struct {
1118 int family, bytelen, bitlen;
1119 __u32 data[8];
1120 } option_data;
1121 option_data local;
1122
1123 memset(&req, 0, sizeof(req));
1124 req.nlm.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
1125 req.nlm.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
1126 req.nlm.nlmsg_type = cmd;
1127 req.ifadd.ifa_family = TT.addressfamily;
1128
1129 while (*argv) {
1130 idx = substring_to_idx(*argv, cmd_objectlist);
1131 if (idx >= 0)
1132 if (!*++argv)
1133 error_exit("Incomplete Command line");
1134 switch(idx) {
1135 case 0:
1136 dev = *argv;
1137 break;
1138 case 1:
1139 case 2:
1140 {
1141 uint32_t addr[4] = {0,}, netmask = 0;
1142 uint8_t len = 0;
1143 parse_prefix(addr, &netmask, &len, *argv,
1144 req.ifadd.ifa_family);
1145 if (len)
1146 req.ifadd.ifa_family = ((len == 4) ? AF_INET : AF_INET6);
1147 length_peer = len;
1148 add_string_to_rtattr(&req.nlm, sizeof(req),
1149 IFA_ADDRESS, addr, len);
1150 req.ifadd.ifa_prefixlen = netmask;
1151 }
1152 break;
1153 case 3:
1154 case 4:
1155 if (*argv[0] == '+') {
1156 length_brd = -1;
1157 } else if (*argv[0] == '-') {
1158 length_brd = -2;
1159 } else {
1160 uint32_t addr[4] = {0,};
1161 uint8_t af = AF_UNSPEC;
1162
1163 if (get_prefix(addr, &af, *argv, req.ifadd.ifa_family))
1164 error_exit("Invalid prefix");
1165
1166 length_brd = ((af == AF_INET6) ? 16 : 4);
1167 if (req.ifadd.ifa_family == AF_UNSPEC)
1168 req.ifadd.ifa_family = af;
1169 add_string_to_rtattr(&req.nlm, sizeof(req),
1170 IFA_BROADCAST, &addr, length_brd);
1171 }
1172 break;
1173 case 5:
1174 label = *argv;
1175 add_string_to_rtattr(&req.nlm, sizeof(req),
1176 IFA_LABEL, label, strlen(label) + 1);
1177 break;
1178 case 6:
1179 {
1180 uint32_t addr[4] = {0,};
1181 uint8_t af = AF_UNSPEC;
1182
1183 if (get_prefix(addr, &af, *argv, req.ifadd.ifa_family))
1184 error_exit("Invalid prefix");
1185 length_any = ((af == AF_INET6) ? 16 : 4);
1186 if (req.ifadd.ifa_family == AF_UNSPEC)
1187 req.ifadd.ifa_family = af;
1188 add_string_to_rtattr(&req.nlm, sizeof(req),
1189 IFA_ANYCAST, &addr, length_any);
1190 }
1191 break;
1192 case 7:
1193 {
1194 int scope = idxfromRPDB(*argv, RPDB_rtscopes);
1195 if (scope < 0) error_exit("wrong scope '%s'", *argv);
1196 req.ifadd.ifa_scope = scope;
1197 scoped = 1;
1198 }
1199 break;
1200 default:
1201 {
1202 //local is by default
1203 uint32_t addr[8] = {0,}, netmask = 0;
1204 uint8_t len = 0;
1205
1206 parse_prefix(addr, &netmask, &len, *argv,
1207 req.ifadd.ifa_family);
1208 if (len)
1209 req.ifadd.ifa_family = ((len == 4) ? AF_INET : AF_INET6);
1210 length_local = len;
1211 local.bitlen = netmask;
1212 local.bytelen = len;
1213 memcpy(local.data, addr, sizeof(local.data));
1214 local.family = req.ifadd.ifa_family;
1215 add_string_to_rtattr(&req.nlm, sizeof(req),
1216 IFA_LOCAL, &local.data, local.bytelen);
1217 }
1218 break;
1219 }
1220 argv++;
1221 }
1222 if (!dev) error_exit("need \"dev \" argument");
1223 if (label && strncmp(dev, label, strlen(dev)) != 0)
1224 error_exit("\"dev\" (%s) must match \"label\" (%s)", dev, label);
1225
1226 if (length_peer == 0 && length_local && cmd != RTM_DELADDR){
1227 add_string_to_rtattr(&req.nlm, sizeof(req),
1228 IFA_ADDRESS, &local.data, local.bytelen);
1229 }
1230
1231 if (length_brd < 0 && cmd != RTM_DELADDR){
1232 int i;
1233
1234 if (req.ifadd.ifa_family != AF_INET)
1235 error_exit("broadcast can be set only for IPv4 addresses");
1236
1237 if (local.bitlen <= 30) {
1238 for (i = 31; i >= local.bitlen; i--) {
1239 if (length_brd == -1)
1240 local.data[0] |= htonl(1<<(31-i));
1241 else
1242 local.data[0] &= ~htonl(1<<(31-i));
1243 }
1244 add_string_to_rtattr(&req.nlm, sizeof(req),
1245 IFA_BROADCAST, &local.data, local.bytelen);
1246 length_brd = local.bytelen;
1247 }
1248 }
1249 if (req.ifadd.ifa_prefixlen == 0)
1250 req.ifadd.ifa_prefixlen = local.bitlen;
1251 if (!scoped && (cmd != RTM_DELADDR) && (local.family == AF_INET)
1252 && (local.bytelen >= 1 && *(uint8_t*)&local.data == 127))
1253 req.ifadd.ifa_scope = RT_SCOPE_HOST;
1254 req.ifadd.ifa_index = get_ifaceindex(dev, 1);
1255
1256 send_nlmesg(RTM_NEWADDR, 0, AF_UNSPEC, (void *)&req, req.nlm.nlmsg_len);
1257 length = recv(TT.sockfd, reply, sizeof(reply), 0);
1258 addr_ptr = (struct nlmsghdr *) reply;
1259 for (; NLMSG_OK(addr_ptr, length); addr_ptr = NLMSG_NEXT(addr_ptr, length)) {
1260 if (addr_ptr->nlmsg_type == NLMSG_DONE)
1261 return 1;
1262 if (addr_ptr->nlmsg_type == NLMSG_ERROR)
1263 err = (struct nlmsgerr*) NLMSG_DATA(addr_ptr);
1264 if (err && err->error) {
1265 errno = -err->error;
1266 perror_exit("RTNETLINK answers:");
1267 }
1268 }
1269 return 0;
1270 }
1271
ipaddr_listflush(char ** argv)1272 static int ipaddr_listflush(char **argv)
1273 {
1274 int idx; uint32_t netmask = 0, found = 0;
1275 char *tmp = NULL, *name = NULL;
1276 struct double_list *dlist;
1277 struct arglist cmd_objectlist[] = {{"to", 0}, {"scope", 1}, {"up", 2},
1278 {"label", 3}, {"dev", 4}, {NULL, -1}};
1279
1280 TT.flush = *argv[-1] == 'f' ? 1 : 0;
1281 memset(&addrinfo, 0, sizeof(addrinfo));
1282
1283 if (TT.flush) {
1284 if (!*argv)
1285 error_exit("Incomplete command for \"flush\"");
1286 if (TT.addressfamily == AF_PACKET)
1287 error_exit("Can't flush link Addressess");
1288 }
1289 addrinfo.scope = -1;
1290 while (*argv) {
1291 switch (idx = substring_to_idx(*argv, cmd_objectlist)) {
1292 case 0:
1293 {// ADDR_TO
1294 if (!*++argv) error_exit("Incomplete Command line");
1295 else if (!strcmp(*argv, "0")) return 0;
1296 uint32_t addr[4] = {0,};
1297 uint8_t len = 0;
1298
1299 addrinfo.to = 1;
1300 parse_prefix(addr, &netmask, &len, *argv, TT.addressfamily);
1301 if (len)
1302 TT.addressfamily = ((len == 4) ? AF_INET : AF_INET6);
1303 addrinfo.addr = strtok(*argv, "/");
1304 }
1305 break;
1306 case 1: // ADDR_SCOPE
1307 {
1308 int scope = 0;
1309 if (!*++argv) error_exit("Incomplete Command line");
1310 name = *argv;
1311
1312 addrinfo.scopemask = -1;
1313 if (isdigit(**argv)) {
1314 int idx = atolx(*argv);
1315
1316 name = xstrdup(namefromRPDB(idx, RPDB_rtscopes));
1317 }
1318 if ((scope = idxfromRPDB(name, RPDB_rtscopes)) < 0) {
1319 if (strcmp(name, "all"))
1320 error_exit("wrong scope '%s'", name);
1321 scope = RT_SCOPE_NOWHERE;
1322 addrinfo.scopemask = 0;
1323 }
1324
1325 if (isdigit(**argv))
1326 free(name);
1327 addrinfo.scope = scope;
1328 }
1329 break;
1330 case 2: // ADDR_UP
1331 addrinfo.up = 1;
1332 break;
1333 case 3: // ADDR_LABEL
1334 if (!*++argv) error_exit("Incomplete Command line");
1335 addrinfo.label = *argv;
1336 break;
1337 case 4: // ADDR_DEV
1338 if (!*++argv) error_exit("Incomplete Command line");
1339
1340 default:
1341 if (TT.filter_dev)
1342 error_exit("Either \"dev\" is duplicate or %s is garbage",
1343 *argv);
1344 TT.filter_dev = *argv;
1345 break;
1346 }
1347 argv++;
1348 }
1349
1350 link_show(&tmp);
1351 while ( linfo && (dlist = dlist_pop(&linfo))){
1352 struct linkdata *tmp = (struct linkdata*) dlist;
1353 char *temp = &tmp->iface[0];
1354
1355 if (TT.filter_dev && strcmp(TT.filter_dev, temp))
1356 continue;
1357 found = 1;
1358 if (TT.flush && addrinfo.label) ipaddr_print( tmp, 0);
1359 if (addrinfo.up && !(tmp->flags & IFF_UP)){
1360 ipaddr_print(tmp, 0);
1361 continue;
1362 }
1363 if (addrinfo.label){
1364 if ( fnmatch(addrinfo.label, temp, 0)) {
1365 ipaddr_print(tmp, 1);
1366 continue;
1367 }
1368 }
1369 if (!TT.addressfamily && ! TT.flush ) print_link_output(tmp);
1370
1371 ipaddr_print(tmp, 0);
1372 free(tmp);
1373 }
1374 if (TT.filter_dev && !found)
1375 error_exit("Device \"%s\" doesn't exist. \n", TT.filter_dev);
1376 return 0;
1377 }
1378
ipaddr_print(struct linkdata * link,int flag_l)1379 static int ipaddr_print( struct linkdata *link, int flag_l)
1380 {
1381 struct nlmsghdr *addr_ptr;
1382 int ip_match = 0;
1383
1384 addrinfo.ifindex = link->iface_idx;
1385 send_nlmesg(RTM_GETADDR, NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST,
1386 AF_UNSPEC, NULL, 0);
1387 if (TT.addressfamily == AF_PACKET) print_link_output(link);
1388
1389 if (addrinfo.label){
1390 char *col = strchr(addrinfo.label, ':');
1391 if (!col && (fnmatch(addrinfo.label, &link->iface[0], 0)))
1392 return 0;
1393 }
1394
1395 while (1){
1396 int len = recv(TT.sockfd, TT.gbuf, sizeof(TT.gbuf), 0);
1397 addr_ptr = (struct nlmsghdr *)TT.gbuf;
1398 struct ifaddrmsg *addressInfo = NLMSG_DATA(addr_ptr);
1399 char lbuf[INET6_ADDRSTRLEN];
1400 struct rtattr *rta, *rta_tb[IFA_MAX+1] = {0,};
1401
1402 int len1 = addr_ptr->nlmsg_len - NLMSG_LENGTH(sizeof(*addressInfo));
1403 if (len1 > 0) {
1404 for (; NLMSG_OK(addr_ptr, len); addr_ptr = NLMSG_NEXT(addr_ptr, len)) {
1405 addressInfo = NLMSG_DATA(addr_ptr);
1406 if (TT.addressfamily && TT.addressfamily != addressInfo->ifa_family)
1407 continue;
1408 if (addrinfo.ifindex && addrinfo.ifindex != addressInfo->ifa_index)
1409 continue;
1410
1411 if (addrinfo.to) {
1412 memset(rta_tb, 0, sizeof(rta_tb));
1413 int rt_len = IFA_PAYLOAD(addr_ptr);
1414 for (rta = IFA_RTA(addressInfo); RTA_OK(rta, rt_len); rta=RTA_NEXT(rta, rt_len)) {
1415 if (rta->rta_type <= IFA_MAX) rta_tb[rta->rta_type] = rta;
1416 }
1417 if (!rta_tb[IFA_LOCAL]) rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
1418 if (rta_tb[IFA_LOCAL]) {
1419 if (!inet_ntop(TT.addressfamily, RTA_DATA(rta_tb[IFA_LOCAL]),
1420 lbuf, sizeof(lbuf))) perror_exit("inet");
1421 if (strcmp(addrinfo.addr, lbuf))
1422 continue;
1423 ip_match=1;
1424 }
1425 if (!ip_match)
1426 continue;
1427 }
1428
1429 if (!TT.flush){
1430 if (addrinfo.scope != -1 && TT.addressfamily && TT.addressfamily ==
1431 addressInfo->ifa_family &&
1432 (addrinfo.ifindex == addressInfo->ifa_index)) {
1433 if ((addrinfo.scope ^ addressInfo->ifa_scope) & addrinfo.scopemask)
1434 continue;
1435 else if (addrinfo.up && (link->flags & IFF_UP))
1436 print_link_output(link);
1437 else if (!addrinfo.up) print_link_output(link);
1438 }
1439 if (TT.addressfamily &&
1440 (addrinfo.ifindex == addressInfo->ifa_index) &&
1441 (addrinfo.scope == -1)){
1442 if (addrinfo.up && (link->flags & IFF_UP))
1443 print_link_output(link);
1444 else if (!addrinfo.up) print_link_output(link);
1445 }
1446 }
1447
1448 for (; NLMSG_OK(addr_ptr, len); addr_ptr = NLMSG_NEXT(addr_ptr, len)) {
1449 if ((addr_ptr->nlmsg_type == RTM_NEWADDR))
1450 print_addrinfo(addr_ptr, flag_l);
1451 if ((addr_ptr->nlmsg_type == NLMSG_DONE) ||
1452 (addr_ptr->nlmsg_type == NLMSG_ERROR) ||
1453 (TT.flush && addrinfo.to))
1454 goto ret_stop;
1455 }
1456 if ((addr_ptr->nlmsg_type == NLMSG_DONE) ||
1457 (addr_ptr->nlmsg_type == NLMSG_ERROR))
1458 break;
1459 }
1460 }
1461 else
1462 return 0;
1463 }
1464
1465 ret_stop:
1466 return 0;
1467 }
1468
ipaddr(char ** argv)1469 static int ipaddr(char **argv)
1470 {
1471 int idx;
1472 cmdobj ipcmd, cmdobjlist[] = {ipaddrupdate, ipaddr_listflush};
1473 struct arglist cmd_objectlist[] = { {"add", 0}, {"delete", 0},
1474 {"list", 1},{"show", 1},{"lst", 1}, {"flush", 1}, {NULL,-1}};
1475
1476 TT.is_addr++;
1477 if (!*argv) idx = 1;
1478 else if ((idx = substring_to_idx(*argv++, cmd_objectlist)) == -1)
1479 help_exit(0);
1480
1481 ipcmd = cmdobjlist[idx];
1482 return ipcmd(argv);
1483 }
1484
1485 // ===========================================================================
1486 // code for ip route
1487 // ===========================================================================
1488 struct I_data {
1489 unsigned char family;
1490 uint32_t addr[8] , netmask ;
1491 uint8_t len ;
1492 };
1493
1494 struct {
1495 int tb,idev,odev,proto;
1496 struct I_data rvia, rdst, mdst, rsrc, msrc;
1497 } gfilter;
1498
show_iproute_help(void)1499 static void show_iproute_help(void)
1500 {
1501 char *errmsg = "\n\n" \
1502 "iproute { list | flush } SELECTOR\n" \
1503 "iproute get ADDRESS [from ADDRESS iif STRING]\n" \
1504 " [oif STRING]\n" \
1505 "iproute { add | del | change | append | replace | test } ROUTE\n" \
1506 " SELECTOR := [root PREFIX] [match PREFIX] [proto RTPROTO]\n" \
1507 " ROUTE := [TYPE] PREFIX [proto RTPROTO] [metric METRIC]";
1508
1509 error_exit(errmsg);
1510 }
1511
print_rta_metrics(char * out,const struct rtattr * mxattr)1512 static void print_rta_metrics(char* out, const struct rtattr *mxattr)
1513 {
1514 int32_t tvar = RTA_PAYLOAD(mxattr);
1515 struct rtattr *rta, *mxrta[RTAX_MAX+1] = {0,};
1516 unsigned int mxlock = 0;
1517 int i;
1518
1519 for (rta = RTA_DATA(mxattr); RTA_OK(rta, tvar); rta=RTA_NEXT(rta, tvar))
1520 if (rta->rta_type <= RTA_MAX) mxrta[rta->rta_type] = rta;
1521
1522 if (mxrta[RTAX_LOCK])
1523 mxlock = *(u_int32_t *)RTA_DATA(mxrta[RTAX_LOCK]);
1524
1525 for (i = 2; i <= RTAX_MAX; i++) {
1526 uint32_t val = 0;
1527
1528 if (mxrta[i] == NULL && !(mxlock & (1 << i)))
1529 continue;
1530
1531 if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
1532 val = *(u_int32_t *)RTA_DATA(mxrta[i]);
1533
1534 if (i == RTAX_HOPLIMIT && (int)val == -1)
1535 continue;
1536
1537 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
1538 sprintf(out, "%s%s ", out, mx_names[i]);
1539 else
1540 sprintf(out, "%smetric %d ", out, i);
1541
1542 if (mxlock & (1<<i))
1543 sprintf(out, "%slock ", out);
1544
1545 switch (i) {
1546 case RTAX_RTT:
1547 case RTAX_RTTVAR:
1548 case RTAX_RTO_MIN:
1549 if (i == RTAX_RTT)
1550 val /= 8;
1551 else if (i == RTAX_RTTVAR)
1552 val /= 4;
1553
1554 if (val >= 1000)
1555 sprintf(out, "%s%gs ", out, val / 1e3);
1556 else
1557 sprintf(out, "%s%ums ", out, val);
1558 break;
1559
1560 case RTAX_CC_ALGO:
1561 sprintf(out, "%scongestion %s ", out, (const char*)RTA_DATA(mxrta[i]));
1562 break;
1563
1564 default:
1565 sprintf(out, "%s%u ", out, val);
1566 break;
1567 }
1568 }
1569 }
1570
display_route_info(struct nlmsghdr * mhdr,char ** argv)1571 static int display_route_info(struct nlmsghdr *mhdr, char **argv)
1572 {
1573 char *inetval = NULL, out[1024] = {0};
1574 struct rtmsg *msg = NLMSG_DATA(mhdr);
1575 struct rtattr *rta, *attr[RTA_MAX+1] = {0,};
1576 int32_t tvar, msglen = mhdr->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg));
1577 int hlen = ((msg->rtm_family == AF_INET) ? 32
1578 : ((msg->rtm_family == AF_INET6) ? 128 : -1));
1579
1580 if (mhdr->nlmsg_type != RTM_NEWROUTE) return 0;
1581 if (msglen < 0) return 1;
1582
1583 if (msg->rtm_family == AF_INET6) {
1584 if (gfilter.tb) {
1585 if (gfilter.tb < 0) {
1586 if (!(msg->rtm_flags & RTM_F_CLONED)) return 0;
1587 } else {
1588 if (msg->rtm_flags & RTM_F_CLONED) return 0;
1589 if (gfilter.tb == RT_TABLE_LOCAL && msg->rtm_type != RTN_LOCAL)
1590 return 0;
1591 else if (gfilter.tb == RT_TABLE_MAIN && msg->rtm_type == RTN_LOCAL)
1592 return 0;
1593 }
1594 }
1595 }
1596 else if (gfilter.tb > 0 && gfilter.tb != msg->rtm_table) return 0;
1597
1598 if (gfilter.proto && (msg->rtm_protocol != gfilter.proto)) return 0;
1599
1600
1601 if (gfilter.rdst.family && (msg->rtm_family != gfilter.rdst.family ||
1602 gfilter.rdst.netmask > msg->rtm_dst_len)) return 0;
1603 if (gfilter.mdst.family && (msg->rtm_family != gfilter.mdst.family
1604 || (gfilter.mdst.netmask < msg->rtm_dst_len))) return 0;
1605 if (gfilter.rsrc.family && (msg->rtm_family != gfilter.rsrc.family
1606 || gfilter.rsrc.netmask > msg->rtm_src_len)) return 0;
1607 if (gfilter.msrc.family && (msg->rtm_family != gfilter.msrc.family
1608 || (gfilter.msrc.netmask < msg->rtm_src_len))) return 0;
1609 tvar = msglen;
1610
1611 for (rta = RTM_RTA(msg); RTA_OK(rta, tvar); rta=RTA_NEXT(rta, tvar))
1612 if (rta->rta_type <= RTA_MAX) attr[rta->rta_type] = rta;
1613
1614 if (msg->rtm_type != RTN_UNICAST)
1615 sprintf(out,"%s%s ", out,rtmtype_idx2str(msg->rtm_type));
1616 if (attr[RTA_DST]) {
1617 inetval = (char *)inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_DST]),
1618 toybuf, sizeof(toybuf));
1619 if (gfilter.rdst.family &&
1620 memcmp(RTA_DATA(attr[RTA_DST]), &gfilter.rdst.addr, gfilter.rdst.len))
1621 return 0;
1622 if (gfilter.mdst.family &&
1623 memcmp(RTA_DATA(attr[RTA_DST]), &gfilter.mdst.addr, gfilter.mdst.len))
1624 return 0;
1625 sprintf(out,"%s%s",out,inetval);
1626 }
1627 if (msg->rtm_dst_len) sprintf(out,"%s/%d ", out,msg->rtm_dst_len);
1628 else sprintf(out,"%s%s",out,"default ");
1629
1630 if (attr[RTA_SRC]) {
1631 inetval = (char *)inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_SRC]),
1632 toybuf, sizeof(toybuf));
1633 if (gfilter.rsrc.family &&
1634 memcmp(RTA_DATA(attr[RTA_SRC]), &gfilter.rsrc.addr, gfilter.rsrc.len))
1635 return 0;
1636 if (gfilter.msrc.family &&
1637 memcmp(RTA_DATA(attr[RTA_SRC]), &gfilter.msrc.addr, gfilter.msrc.len))
1638 return 0;
1639 sprintf(out, "%s from %s", out, inetval);
1640 }
1641 if (msg->rtm_src_len) sprintf(out, "%s/%d ", out, msg->rtm_src_len);
1642
1643 if (attr[RTA_GATEWAY]) {
1644 inetval = (char *)inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_GATEWAY]),
1645 toybuf, sizeof(toybuf));
1646 sprintf(out, "%s via %s ", out, inetval);
1647 }
1648 if (gfilter.rvia.family) {
1649 char tmp[256];
1650
1651 if (!attr[RTA_GATEWAY]) return 0;
1652 if (strcmp((char *)inet_ntop(msg->rtm_family, gfilter.rvia.addr,
1653 tmp, sizeof(tmp)), inetval)) return 0;
1654 }
1655
1656 if (gfilter.odev != 0) if (!attr[RTA_OIF]) return 0;
1657 if (attr[RTA_OIF]) {
1658 if (gfilter.odev !=0 && gfilter.odev != *(int*)RTA_DATA(attr[RTA_OIF]))
1659 return 0;
1660 sprintf(out, "%s dev %s ", out,
1661 if_indextoname(*(int*)RTA_DATA(attr[RTA_OIF]), toybuf));
1662 }
1663
1664 if (attr[RTA_PREFSRC] && hlen) {
1665 inetval = (char *)inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_PREFSRC]),
1666 toybuf, sizeof(toybuf));
1667 sprintf(out, "%s src %s ", out, inetval);
1668 }
1669 if (attr[RTA_PRIORITY])
1670 sprintf(out, "%s metric %d ", out, *(uint32_t*)RTA_DATA(attr[RTA_PRIORITY]));
1671 if (msg->rtm_family == AF_INET6) {
1672 struct rta_cacheinfo *ci = NULL;
1673 if (attr[RTA_CACHEINFO]) ci = RTA_DATA(attr[RTA_CACHEINFO]);
1674 if ((msg->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
1675 if (msg->rtm_flags & RTM_F_CLONED) sprintf(out, "%s%s cache ",
1676 out, (!TT.singleline ? "\n" : " "));
1677 if (ci && ci->rta_expires) {
1678 int hz = 0;
1679 FILE *fp = xfopen("/proc/net/psched","r");
1680
1681 if (fp) {
1682 unsigned int nom, denom;
1683
1684 if (fscanf(fp, "%*08x%*08x%08x%08x", &nom, &denom) == 2)
1685 if (nom == 1000000)
1686 hz = denom;
1687 fclose(fp);
1688 }
1689 if (!hz) hz = sysconf(_SC_CLK_TCK);
1690 sprintf(out, "%s expires %dsec", out, ci->rta_expires /hz);
1691 }
1692 if (ci && ci->rta_error) sprintf(out, "%s error %d", out, ci->rta_error);
1693 }
1694 else if (ci && ci->rta_error)
1695 sprintf(out, "%s error %d", out, ci->rta_error);
1696 }
1697 if (attr[RTA_IIF] && !gfilter.idev)
1698 sprintf(out, "%s iif %s", out,
1699 if_indextoname(*(int*)RTA_DATA(attr[RTA_IIF]), toybuf));
1700
1701 if (attr[RTA_METRICS])
1702 print_rta_metrics(out, attr[RTA_METRICS]);
1703
1704 if (TT.flush || (TT.connected && !TT.from_ok))
1705 memcpy(toybuf, (void*)mhdr,mhdr->nlmsg_len);
1706
1707 if (TT.flush) {
1708 int sockfd = 0;
1709 struct nlmsghdr* mhdr = (struct nlmsghdr*)toybuf;
1710 struct rtmsg *msg = NLMSG_DATA(mhdr);
1711 int tvar, msglen = mhdr->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg));
1712 struct rtattr *rta, *attr[RTA_MAX+1] = {0,};
1713
1714 tvar = msglen;
1715 for (rta = RTM_RTA(msg); RTA_OK(rta, tvar); rta=RTA_NEXT(rta, tvar))
1716 if (rta->rta_type <= RTA_MAX) attr[rta->rta_type] = rta;
1717
1718 if (msg->rtm_family == AF_INET6
1719 && !msg->rtm_dst_len
1720 && msg->rtm_type == RTN_UNREACHABLE
1721 && attr[RTA_PRIORITY]
1722 && *(int*)RTA_DATA(attr[RTA_PRIORITY]) == -1)
1723 return 0;
1724
1725 mhdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
1726 mhdr->nlmsg_type = RTM_DELROUTE;
1727 mhdr->nlmsg_pid = 0;
1728 sockfd = xsocket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1729 if (send(sockfd , (void*)mhdr, mhdr->nlmsg_len, 0) < 0)
1730 perror_exit("Unable to send data on socket.");
1731
1732 while (1) {
1733 struct nlmsghdr *mhdr;
1734 int msglen = recv(sockfd, toybuf, sizeof(toybuf), 0);
1735
1736 if ((msglen < 0) && (errno == EINTR || errno == EAGAIN)) continue;
1737 else if (msglen < 0) {
1738 error_msg("netlink receive error %s", strerror(errno));
1739 xclose(sockfd);
1740 return 1;
1741 } else if (!msglen) {
1742 error_msg("EOF on netlink");
1743 xclose(sockfd);
1744 return 1;
1745 }
1746
1747 for (mhdr = (struct nlmsghdr*)toybuf; NLMSG_OK(mhdr, msglen);
1748 mhdr = NLMSG_NEXT(mhdr, msglen)) {
1749 switch (mhdr->nlmsg_type) {
1750 case NLMSG_DONE:
1751 xclose(sockfd);
1752 return 0;
1753 case NLMSG_ERROR:
1754 {
1755 struct nlmsgerr *merr = (struct nlmsgerr*)NLMSG_DATA(mhdr);
1756
1757 if (merr->error == 0) { xclose(sockfd); return 0; }
1758 if (mhdr->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
1759 error_msg("ERROR truncated");
1760 else {
1761 errno = -merr->error;
1762 perror_msg("RTNETLINK answers");
1763 }
1764 xclose(sockfd);
1765 return 1;
1766 }
1767 default:
1768 break;
1769 }
1770 } // End of for loop.
1771 } // End of while loop.
1772
1773 xclose(sockfd);
1774 } else printf("%s\n",out);
1775 return 0;
1776 }
1777
route_get(char ** argv)1778 static int route_get(char **argv)
1779 {
1780 int idx, flag;
1781 struct arglist cmd_objectlist[] = {{"from", 0}, {"iif", 1}, {"oif", 2},
1782 {"dev", 3}, {"notify", 4}, {"connected", 5}, {"to", 6}, {NULL, -1}};
1783 char *idev = NULL, *odev = NULL;
1784 struct {
1785 struct nlmsghdr mhdr;
1786 struct rtmsg msg;
1787 char buf[1024];
1788 } request;
1789
1790 memset(&request, 0, sizeof(request));
1791 request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
1792 request.mhdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
1793 request.mhdr.nlmsg_type = RTM_GETROUTE;
1794 request.msg.rtm_family = AF_UNSPEC;
1795
1796 for (; *argv; argv++) {
1797 switch(idx = substring_to_idx(*argv, cmd_objectlist)) {
1798 case 0: TT.from_ok = 1; // dst address
1799 case 6: argv++; //fallthrough
1800 default:
1801 {
1802 uint32_t addr[8] = {0,}, netmask = 0;
1803 uint8_t len = 0;
1804
1805 if (!*argv) error_exit("'%s': Missing Prefix", argv[-1]);
1806 parse_prefix(addr, &netmask, &len, *argv, request.msg.rtm_family);
1807 if (len) request.msg.rtm_family = ((len == 4) ? AF_INET : AF_INET6);
1808 netmask = (request.msg.rtm_family == AF_INET6) ? 128 : 32;
1809 if (!idx) request.msg.rtm_src_len = netmask;
1810 else request.msg.rtm_dst_len = netmask;
1811 add_string_to_rtattr(&request.mhdr, sizeof(request),
1812 (!idx ? RTA_SRC : RTA_DST), addr, len);
1813 break;
1814 }
1815 case 1:
1816 case 2:
1817 case 3:
1818 if (!*++argv) show_iproute_help();
1819 if (idx == 1) idev = *argv, flag = RTA_IIF;
1820 else odev = *argv, flag = RTA_OIF;
1821 idx = get_ifaceindex(*argv, 1);
1822 add_string_to_rtattr(&request.mhdr, sizeof(request),
1823 flag, (char*)&idx, sizeof(idx));
1824 break;
1825 case 4:
1826 request.msg.rtm_flags |= RTM_F_NOTIFY;
1827 break;
1828 case 5:
1829 TT.connected = 1;
1830 break;
1831 }
1832 }
1833 if (!request.msg.rtm_dst_len)
1834 error_exit("need at least destination address");
1835
1836 send_nlmesg(0, 0, 0, &request, sizeof(request));
1837 filter_nlmesg(display_route_info, NULL);
1838
1839 if (TT.connected && !TT.from_ok) {
1840 struct nlmsghdr *mhdr = (struct nlmsghdr*)toybuf;
1841 struct rtmsg *msg = NLMSG_DATA(mhdr);
1842 int tvar, msglen = mhdr->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg));
1843 struct rtattr *rta, *attr[RTA_MAX+1] = {0,};
1844
1845 if (mhdr->nlmsg_type != RTM_NEWROUTE) error_exit("not a route?");
1846 if (msglen < 0) error_exit("wrong len %d", msglen);
1847
1848 tvar = msglen;
1849 for (rta = RTM_RTA(msg); RTA_OK(rta, tvar); rta=RTA_NEXT(rta, tvar))
1850 if (rta->rta_type <= RTA_MAX) attr[rta->rta_type] = rta;
1851
1852 if (attr[RTA_PREFSRC]) {
1853 attr[RTA_PREFSRC]->rta_type = RTA_SRC;
1854 msg->rtm_src_len = 8*RTA_PAYLOAD(attr[RTA_PREFSRC]);
1855 } else if (!attr[RTA_SRC]) error_exit("can't connect the route");
1856
1857 if (!odev && attr[RTA_OIF]) attr[RTA_OIF]->rta_type = 0;
1858 if (attr[RTA_GATEWAY]) attr[RTA_GATEWAY]->rta_type = 0;
1859 if (!idev && attr[RTA_IIF]) attr[RTA_IIF]->rta_type = 0;
1860 mhdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
1861 mhdr->nlmsg_type = RTM_GETROUTE;
1862 mhdr->nlmsg_pid = 0;
1863 xclose(TT.sockfd);
1864 TT.sockfd = xsocket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1865 send_nlmesg(0, 0, 0, mhdr, mhdr->nlmsg_len);
1866 filter_nlmesg(display_route_info, NULL);
1867 }
1868 return 0;
1869 }
1870
route_show_flush(char ** argv)1871 static int route_show_flush(char **argv)
1872 {
1873 struct arglist cmd_objectlist[] = {{"protocol", 0}, {"dev", 1}, {"oif", 2},
1874 {"iif", 3}, {"via", 4}, {"table", 5}, {"cache", 6}, {"from", 7},
1875 {"to", 8}, {"all", 9}, {"root", 10}, {"match", 11}, {"exact", 12},
1876 {"main", 13}, {NULL,-1}};
1877 int family = TT.addressfamily, idx;
1878 struct {
1879 struct nlmsghdr mhdr;
1880 struct rtmsg msg;
1881 } request;
1882
1883 if (*argv[-1] == 'f') TT.flush = 1;
1884 if (TT.flush && !*argv) show_iproute_help();
1885
1886 gfilter.tb = RT_TABLE_MAIN;
1887 for (; *argv; argv++) {
1888 switch (idx = substring_to_idx(*argv, cmd_objectlist)) {
1889 case 0:
1890 if (!*++argv) show_iproute_help();
1891 if ((idx = idxfromRPDB(*argv,RPDB_rtprotos)) < 0)
1892 error_exit("Invalid argument protocol.");
1893 gfilter.proto = idx;
1894 break;
1895 case 1:
1896 case 2:
1897 case 3:
1898 {
1899 if (!*++argv) show_iproute_help();
1900 int dev = get_ifaceindex(*argv, 1);
1901
1902 if (idx == 3) gfilter.idev = dev;
1903 else gfilter.odev = dev;
1904 }
1905 break;
1906 case 4:
1907 if (!*++argv) show_iproute_help();
1908 parse_prefix(gfilter.rvia.addr, &gfilter.rvia.netmask,
1909 &gfilter.rvia.len, *argv, gfilter.rvia.family);
1910 if (gfilter.rvia.len)
1911 gfilter.rvia.family = ((gfilter.rvia.len == 4) ?
1912 AF_INET : AF_INET6);
1913 break;
1914 case 5:
1915 if (!*++argv) show_iproute_help();
1916 idx = substring_to_idx(*argv, cmd_objectlist);
1917 if (idx == 6) gfilter.tb = -1;
1918 else if (idx == 9) gfilter.tb = 0;
1919 else if (idx != 13) {
1920 if ((gfilter.tb = idxfromRPDB(*argv, RPDB_rttables)) < 0)
1921 error_exit("table %s is invalid.", *argv);
1922 }
1923 break;
1924 case 6:
1925 gfilter.tb = -1;
1926 break;
1927 case 7:
1928 if (!*++argv) show_iproute_help();
1929 idx = substring_to_idx(*argv, cmd_objectlist);
1930 if (idx < 0) if (!*++argv) show_iproute_help();
1931 if (idx == 10)
1932 if (!*++argv) show_iproute_help();
1933 parse_prefix(gfilter.rsrc.addr, &gfilter.rsrc.netmask,
1934 &gfilter.rsrc.len, *argv, gfilter.rsrc.family);
1935 if (gfilter.rsrc.len)
1936 gfilter.rsrc.family = ((gfilter.rsrc.len == 4) ?
1937 AF_INET : AF_INET6);
1938 else {
1939 if ((idx == 12 ||idx == 11) && !*++argv) show_iproute_help();
1940 parse_prefix(gfilter.msrc.addr, &gfilter.msrc.netmask,
1941 &gfilter.msrc.len, *argv, gfilter.msrc.family);
1942 if (gfilter.msrc.len)
1943 gfilter.msrc.family = ((gfilter.msrc.len == 4) ?
1944 AF_INET : AF_INET6);
1945 if (idx != 11) gfilter.rsrc = gfilter.msrc;
1946 }
1947 break;
1948 case 8:
1949 idx = substring_to_idx(*argv, cmd_objectlist);
1950 if (idx != -1 && !*++argv) show_iproute_help();
1951 default: // fallthrough
1952 if (idx == 10) {
1953 if (!*++argv) show_iproute_help();
1954 parse_prefix(gfilter.rdst.addr, &gfilter.rdst.netmask,
1955 &gfilter.rdst.len, *argv, gfilter.rdst.family);
1956 if (gfilter.rdst.len)
1957 gfilter.rdst.family = ((gfilter.rdst.len == 4) ?
1958 AF_INET : AF_INET6);
1959 }
1960 else {
1961 if ((idx == 12 ||idx == 11) && !*++argv) show_iproute_help();
1962 parse_prefix(gfilter.mdst.addr, &gfilter.mdst.netmask,
1963 &gfilter.mdst.len, *argv, gfilter.mdst.family);
1964 if (gfilter.mdst.len)
1965 gfilter.mdst.family = ((gfilter.mdst.len == 4) ?
1966 AF_INET : AF_INET6);
1967 if (idx != 11) gfilter.rdst = gfilter.mdst;
1968 }
1969 break;
1970 }
1971 }
1972 if (family == AF_UNSPEC && gfilter.tb) family = AF_INET;
1973
1974 if (TT.flush) {
1975 if (gfilter.tb < 0) { // flush table cache
1976 if (family != AF_INET6) {
1977 FILE *fp = xfopen("/proc/sys/net/ipv4/route/flush", "w");
1978
1979 if (fwrite("-1",1,2,fp) < 2) error_exit("can't flush routing cache");
1980 fclose(fp);
1981 }
1982 if (family == AF_INET) return 0;
1983 }
1984 }
1985
1986 memset(&request, 0, sizeof (request));
1987 request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof (struct rtmsg));
1988 request.mhdr.nlmsg_flags = NLM_F_REQUEST;
1989 request.mhdr.nlmsg_flags |= NLM_F_ROOT | NLM_F_MATCH;
1990 request.mhdr.nlmsg_type = RTM_GETROUTE;
1991 request.msg.rtm_family = family;
1992 if (gfilter.tb < 0) request.msg.rtm_flags = RTM_F_CLONED;
1993 send_nlmesg(0, 0, 0, (void*)&request, sizeof (request));
1994 return (filter_nlmesg(display_route_info, NULL));
1995 }
1996
route_update(char ** argv,unsigned int route_flags)1997 static int route_update(char **argv, unsigned int route_flags)
1998 {
1999 char mxbuf[256], *d = NULL;
2000 struct rtattr *mxrta = (void*)mxbuf;
2001 unsigned mxlock = 0, ok = 0;
2002 int idx;
2003 uint32_t addr[8] = {0,}, netmask = 0;
2004 uint8_t len = 0;
2005
2006 struct arglist cmd_objectlist[] = {{"src", 0}, {"via", 1}, {"mtu", 2},
2007 {"lock", 3}, {"protocol", 4}, {"table", 5}, {"dev", 6}, {"oif", 7},
2008 {"to", 8}, {"metric", 9}, {NULL,-1}
2009 };
2010 enum {
2011 gtwy_ok = 1,
2012 dst_ok = 2,
2013 proto_ok = 4,
2014 type_ok = 8
2015 };
2016 struct {
2017 struct nlmsghdr hdr;
2018 struct rtmsg msg;
2019 char buf[1024];
2020 } req;
2021
2022 memset(&req, 0, sizeof(req));
2023 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
2024 req.hdr.nlmsg_flags = NLM_F_ACK| NLM_F_REQUEST | route_flags;
2025 req.hdr.nlmsg_type = TT.route_cmd;
2026 req.msg.rtm_family = AF_UNSPEC;
2027 req.msg.rtm_table = RT_TABLE_MAIN;
2028 req.msg.rtm_scope = RT_SCOPE_NOWHERE;
2029
2030 if (TT.route_cmd != RTM_DELROUTE) {
2031 req.msg.rtm_protocol = RTPROT_BOOT;
2032 req.msg.rtm_scope = RT_SCOPE_UNIVERSE;
2033 req.msg.rtm_type = RTN_UNICAST;
2034 }
2035
2036 mxrta->rta_type = RTA_METRICS;
2037 mxrta->rta_len = RTA_LENGTH(0);
2038
2039 for (; *argv; argv++) {
2040 idx = substring_to_idx(*argv, cmd_objectlist);
2041 if (!idx) {
2042 if (!*++argv) show_iproute_help();
2043 parse_prefix(addr, &netmask, &len, *argv, req.msg.rtm_family);
2044 if (len) req.msg.rtm_family = ((len == 4) ? AF_INET : AF_INET6);
2045 add_string_to_rtattr(&req.hdr, sizeof(req), RTA_PREFSRC, addr, len);
2046 } else if (idx == 1) {
2047 ok |= gtwy_ok;
2048 if (!*++argv) show_iproute_help();
2049 parse_prefix(addr, &netmask, &len, *argv, req.msg.rtm_family);
2050 if (len) req.msg.rtm_family = ((len == 4) ? AF_INET : AF_INET6);
2051 add_string_to_rtattr(&req.hdr, sizeof(req),RTA_GATEWAY, addr, len);
2052 } else if (idx == 2) {
2053 if (!*++argv) show_iproute_help();
2054 if (substring_to_idx(*argv, cmd_objectlist ) == 3) {
2055 mxlock |= (1 << RTAX_MTU);
2056 if (!*++argv) show_iproute_help();
2057 }
2058 idx = atolx(*argv);
2059 add_uint32_rtattr_to_buffer(mxrta, sizeof(mxbuf), RTAX_MTU, idx);
2060 } else if (idx == 4) {
2061 if (!*++argv) show_iproute_help();
2062 if ((idx = idxfromRPDB(*argv,RPDB_rtprotos)) < 0)
2063 error_exit("Invalid argument protocol %s.",*argv);
2064 req.msg.rtm_protocol = idx;
2065 ok |= proto_ok;
2066 } else if (idx == 5) {
2067 if (!*++argv) show_iproute_help();
2068 req.msg.rtm_table = idxfromRPDB(*argv, RPDB_rttables);
2069 } else if (idx == 6 || idx == 7) {
2070 if (!*++argv) show_iproute_help();
2071 d = *argv;
2072 } else if (idx == 9) {
2073 unsigned long metric;
2074 unsigned int res;
2075 char* ptr;
2076 if (!*++argv) show_iproute_help();
2077 metric = strtoul(*argv, &ptr, 0);
2078 if (!(!*ptr && metric <= 0xFFFFFFFFUL))
2079 error_exit("Invalid argument metric %s.",*argv);
2080 else
2081 res = metric;
2082 add_string_to_rtattr(&req.hdr, sizeof(req),
2083 RTA_PRIORITY, (char*)&res, sizeof(res));
2084 } else {
2085 if (idx == 8)
2086 if (!*++argv) show_iproute_help();
2087 idx = substring_to_idx(*argv,rtmtypes);
2088 if (idx != -1) {
2089 if (!*++argv) show_iproute_help();
2090 req.msg.rtm_type = idx;
2091 ok |= type_ok;
2092 }
2093 if (ok & dst_ok) error_exit("Duplicate argument 'to'");
2094 parse_prefix(addr, &netmask, &len, *argv, req.msg.rtm_family);
2095 if (len) req.msg.rtm_family = ((len == 4) ? AF_INET : AF_INET6);
2096 req.msg.rtm_dst_len = netmask;
2097 ok |= dst_ok;
2098 if (len) add_string_to_rtattr(&req.hdr, sizeof(req),RTA_DST, addr, len);
2099 }
2100 }
2101
2102 if (d) {
2103 idx = get_ifaceindex(d,1);
2104 add_string_to_rtattr(&req.hdr, sizeof(req),
2105 RTA_OIF, (char*)&idx, sizeof(idx));
2106 }
2107 if (mxrta->rta_len > RTA_LENGTH(0)) {
2108 if (mxlock)
2109 add_uint32_rtattr_to_buffer(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
2110 add_string_to_rtattr(&req.hdr, sizeof(req),
2111 RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
2112 }
2113
2114 if (req.msg.rtm_type == RTN_LOCAL || req.msg.rtm_type == RTN_NAT)
2115 req.msg.rtm_scope = RT_SCOPE_HOST;
2116 else if (req.msg.rtm_type == RTN_BROADCAST||req.msg.rtm_type == RTN_MULTICAST
2117 || req.msg.rtm_type == RTN_ANYCAST)
2118 req.msg.rtm_scope = RT_SCOPE_LINK;
2119 else if (req.msg.rtm_type == RTN_UNICAST || req.msg.rtm_type == RTN_UNSPEC) {
2120 if (TT.route_cmd == RTM_DELROUTE)
2121 req.msg.rtm_scope = RT_SCOPE_NOWHERE;
2122 else if (!(ok & gtwy_ok))
2123 req.msg.rtm_scope = RT_SCOPE_LINK;
2124 }
2125 if (req.msg.rtm_family == AF_UNSPEC) req.msg.rtm_family = AF_INET;
2126 send_nlmesg(0, 0, 0, &req, sizeof(req));
2127 filter_nlmesg(NULL, NULL);
2128 return 0;
2129 }
2130
iproute(char ** argv)2131 static int iproute(char **argv)
2132 {
2133 int idx = 1;
2134 struct arglist cmd_objectlist1[] = {{"add", 0}, {"append", 1},{"change", 2},
2135 {"chg", 3},{"delete",4}, {"get", 5}, {"list", 6}, {"show", 7},
2136 {"prepend", 8},{"replace", 9},{"test", 10}, {"flush", 11},{NULL,-1}};
2137
2138 TT.route_cmd = RTM_NEWROUTE;
2139 switch (idx = substring_to_idx(*argv , cmd_objectlist1)) {
2140 case 0: // add
2141 return route_update(++argv , NLM_F_CREATE|NLM_F_EXCL);
2142 case 1: // append
2143 return route_update(++argv , NLM_F_CREATE|NLM_F_APPEND);
2144 case 2: // change
2145 case 3: // chg
2146 return route_update(++argv , NLM_F_REPLACE);
2147 case 4: // delete
2148 TT.route_cmd = RTM_DELROUTE;
2149 return route_update(++argv , RTM_DELROUTE);
2150 case 5:
2151 return route_get(++argv);
2152 case 6:
2153 case 7:
2154 return route_show_flush(++argv);
2155 case 8: // prepend
2156 return route_update(++argv , NLM_F_CREATE);
2157 case 9: // replace
2158 return route_update(++argv , NLM_F_CREATE|NLM_F_REPLACE);
2159 case 10: // test
2160 return route_update(++argv , NLM_F_EXCL);
2161 case 11: // flush
2162 return route_show_flush(++argv);
2163 default:
2164 if (!*argv) return route_show_flush(argv);
2165 else show_iproute_help();
2166 }
2167 return 0; // non reachable code.
2168 }
2169
2170
2171 // ===========================================================================
2172 // code for ip rule.
2173 // ===========================================================================
show_iprule_help(void)2174 static void show_iprule_help(void)
2175 {
2176 char *errmsg = "usage: ip rule [ list | add | del ] SELECTOR ACTION\n"
2177 "SELECTOR := [ from PREFIX ] [ to PREFIX ] [pref NUMBER] [ tos TOS ]\n"
2178 " [ fwmark FWMARK] [ dev/iif STRING ] [type TYPE]\n"
2179 "ACTION := [ table TABLE_ID ] [ realms [SRCREALM/]DSTREALM ]";
2180
2181 error_exit(errmsg);
2182 }
2183
ruleupdate(char ** argv)2184 static int ruleupdate(char **argv)
2185 {
2186 int8_t idx, tflag = 0, opt = (*argv[-1] == 'a') ? RTM_NEWRULE : RTM_DELRULE;
2187 struct arglist options[] = {{"from", 0}, {"to", 1}, {"preference", 2},
2188 {"order", 2}, {"priority", 2}, {"tos", 3}, {"dsfield", 3}, {"fwmark", 4},
2189 {"realms", 5}, {"table", 6}, {"lookup", 6}, {"dev", 7}, {"iif", 7},
2190 {"nat", 8}, {"map-to", 8}, {"type", 9}, {"help", 10}, {NULL, -1}};
2191 struct {
2192 struct nlmsghdr mhdr;
2193 struct rtmsg msg;
2194 char buf[1024];
2195 } request;
2196
2197 memset(&request, 0, sizeof(request));
2198 request.mhdr.nlmsg_type = opt;
2199 request.mhdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
2200 request.mhdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK |
2201 ((opt == RTM_DELRULE) ? 0 : NLM_F_CREATE | NLM_F_EXCL);
2202 request.msg.rtm_family = TT.addressfamily;
2203 request.msg.rtm_protocol = RTPROT_BOOT;
2204 request.msg.rtm_scope = RT_SCOPE_UNIVERSE;
2205 request.msg.rtm_table = 0;
2206 request.msg.rtm_type = ((opt == RTM_DELRULE) ? RTN_UNSPEC : RTN_UNICAST);
2207
2208 for (; *argv; argv++) {
2209 switch ((idx = substring_to_idx(*argv, options))) {
2210 case 0:
2211 case 1:
2212 { // e.g. from IP/Netmask and to IP/Netmask.
2213 uint32_t addr[4] = {0,}, netmask = 0;
2214 uint8_t len = 0, *tmp;
2215
2216 if (!*++argv) error_exit("'%s': Missing Prefix", argv[-1]);
2217 parse_prefix(addr, &netmask, &len, *argv, request.msg.rtm_family);
2218
2219 tmp = idx ? &request.msg.rtm_dst_len : &request.msg.rtm_src_len;
2220 if (!netmask) *tmp = 0;
2221 else *tmp = netmask;
2222
2223 add_string_to_rtattr(&request.mhdr, sizeof(request),
2224 (idx ? RTA_DST : RTA_SRC), addr, len);
2225 }
2226 break;
2227 case 2:
2228 case 4:
2229 { // e.g. Preference p# and fwmark MARK
2230 uint32_t pref;
2231 char *ptr;
2232
2233 if (!*++argv)
2234 error_exit("Missing %s", (idx == 2) ? "Preference" : "fwmark");
2235 pref = strtoul(*argv, &ptr, 0);
2236 if (!ptr || (ptr == *argv) || *ptr || pref > 0xFFFFFFFFUL)
2237 error_exit("Invalid %s", (idx == 2) ? "Preference" : "fwmark");
2238 add_string_to_rtattr(&request.mhdr, sizeof(request),
2239 ((idx == 2) ? RTA_PRIORITY : RTA_PROTOINFO),
2240 (void *)&pref, sizeof(uint32_t));
2241 }
2242 break;
2243 case 3:
2244 {
2245 uint32_t tos;
2246 if (!*++argv) error_exit("Missing TOS key");
2247 if ((tos = idxfromRPDB(*argv, RPDB_rtdsfield)) < 0)
2248 error_exit("Invalid TOS");
2249 request.msg.rtm_tos = tos;
2250 }
2251 break;
2252 case 5:
2253 { // e.g. realms FROM_realm/TO_realm
2254 uint32_t realms = 0;
2255 int ret;
2256 char *ptr;
2257
2258 if (!*++argv) error_exit("Missing REALMSID");
2259 if ((ptr = strchr(*argv, '/'))) {
2260 *ptr = 0;
2261 if ((ret = idxfromRPDB(*argv, RPDB_rtrealms)) < 0)
2262 error_exit("Invalid realms");
2263 realms = ret;
2264 realms <<= 16;
2265 *ptr++ = '/';
2266 } else ptr = *argv;
2267 if ((ret = idxfromRPDB(ptr, RPDB_rtrealms)) < 0)
2268 error_exit("Invalid realms");
2269 realms |= ret;
2270 add_string_to_rtattr(&request.mhdr, sizeof(request),
2271 RTA_FLOW, (void *)&realms, sizeof(uint32_t));
2272 }
2273 break;
2274 case 6:
2275 { // e.g. table tid/tableName
2276 int tid;
2277 if (!*++argv) error_exit("Missing TableID");
2278 if ((tid = idxfromRPDB(*argv, RPDB_rttables)) < 0)
2279 error_exit("Invalid TID");
2280 request.msg.rtm_table = tid;
2281 tflag = 1;
2282 }
2283 break;
2284 case 7:
2285 {
2286 if (!*++argv) error_exit("Missing dev/iif NAME");
2287 add_string_to_rtattr(&request.mhdr, sizeof(request),
2288 RTA_IIF, *argv, strlen(*argv)+1);
2289 }
2290 break;
2291 case 8:
2292 {
2293 uint32_t addr[4] = {0,};
2294 uint8_t af = AF_UNSPEC;
2295
2296 if (!*++argv) error_exit("Missing nat/map-to ADDRESS");
2297 if (get_prefix(addr, &af /* Un-used variable */, *argv, AF_INET))
2298 error_exit("Invalid mapping Address");
2299
2300 add_string_to_rtattr(&request.mhdr, sizeof(request),
2301 RTA_GATEWAY, addr, sizeof(uint32_t));
2302 request.msg.rtm_type = RTN_NAT;
2303 }
2304 break;
2305 case 9:
2306 {
2307 if (!*++argv) error_exit("TYPE Missing");
2308 request.msg.rtm_type = rtmtype_str2idx(*argv);
2309 }
2310 break;
2311 case 10:
2312 show_iprule_help();
2313 break; // Unreachable code.
2314 default:
2315 error_exit("Invalid argument '%s'", *argv);
2316 break; // Unreachable code.
2317 }
2318 }
2319
2320 if (!request.msg.rtm_family) request.msg.rtm_family = AF_INET;
2321 if (!tflag && opt == RTM_NEWRULE) request.msg.rtm_table = RT_TABLE_MAIN;
2322
2323 send_nlmesg(0, 0, 0, &request, sizeof(request));
2324 return (filter_nlmesg(NULL, NULL));
2325 }
2326
show_rules(struct nlmsghdr * mhdr,char ** argv)2327 static int show_rules(struct nlmsghdr *mhdr,
2328 char **argv __attribute__ ((__unused__)))
2329 {
2330 struct rtmsg *msg = NLMSG_DATA(mhdr);
2331 struct rtattr *rta, *attr[RTA_MAX+1] = {0,};
2332 int32_t tvar, msglen = mhdr->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg));
2333 int hlen = ((msg->rtm_family == AF_INET) ? 32
2334 : ((msg->rtm_family == AF_INET6) ? 128 : -1));
2335
2336 if (mhdr->nlmsg_type != RTM_NEWRULE) return 0;
2337 if (msglen < 0) return 1;
2338
2339 tvar = msglen;
2340 for (rta = RTM_RTA(msg); RTA_OK(rta, tvar); rta=RTA_NEXT(rta, tvar))
2341 if (rta->rta_type <= RTA_MAX) attr[rta->rta_type] = rta;
2342
2343 if (tvar) error_msg("deficit %d, rtalen = %d!", tvar, rta->rta_len);
2344
2345 printf("%u:\tfrom ", attr[RTA_PRIORITY] ?
2346 *(unsigned *)RTA_DATA(attr[RTA_PRIORITY]) : 0);
2347
2348 if (attr[RTA_SRC]) {
2349 printf("%s", (msg->rtm_family == AF_INET || msg->rtm_family == AF_INET6)
2350 ? inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_SRC]),
2351 toybuf, sizeof(toybuf))
2352 : "???");
2353 (msg->rtm_src_len != hlen) ? printf("/%u", msg->rtm_src_len) : 0;
2354 } else msg->rtm_src_len ? printf("0/%d", msg->rtm_src_len) : printf("all");
2355
2356 xputc(' ');
2357 if (attr[RTA_DST]) {
2358 printf("to %s", (msg->rtm_family == AF_INET || msg->rtm_family == AF_INET6)
2359 ? inet_ntop(msg->rtm_family, RTA_DATA(attr[RTA_DST]),
2360 toybuf, sizeof(toybuf)) : "???");
2361 (msg->rtm_dst_len != hlen) ? printf("/%u", msg->rtm_dst_len) : xputc(' ');
2362 } else if (msg->rtm_dst_len)
2363 printf("to 0/%d ", msg->rtm_dst_len);
2364
2365 if (msg->rtm_tos)
2366 printf("tos %s ", namefromRPDB(msg->rtm_tos, RPDB_rtdsfield));
2367
2368 if (attr[RTA_PROTOINFO])
2369 printf("fwmark %#x ", *(uint32_t*)RTA_DATA(attr[RTA_PROTOINFO]));
2370
2371 if (attr[RTA_IIF]) printf("iif %s ", (char*)RTA_DATA(attr[RTA_IIF]));
2372
2373 if (msg->rtm_table)
2374 printf("lookup %s ", namefromRPDB(msg->rtm_table, RPDB_rttables));
2375
2376 if (attr[RTA_FLOW]) {
2377 u_int32_t from, to = *(u_int32_t *)RTA_DATA(attr[RTA_FLOW]);
2378 char *format = "realms %s/";
2379
2380 to = (from = (to >> 16)) & 0xFFFF;
2381 format = (from ? format: "%s");
2382 printf(format, namefromRPDB((from ? from : to), RPDB_rtrealms));
2383 }
2384
2385 if (msg->rtm_type == RTN_NAT) {
2386 if (!attr[RTA_GATEWAY]) printf("masquerade");
2387 else printf("map-to %s ", inet_ntop(msg->rtm_family,
2388 RTA_DATA(attr[RTA_GATEWAY]), toybuf, sizeof(toybuf)));
2389 } else if (msg->rtm_type != RTN_UNICAST)
2390 printf("%s", rtmtype_idx2str(msg->rtm_type));
2391
2392 xputc('\n');
2393 return 0;
2394 }
2395
rulelist(char ** argv)2396 static int rulelist(char **argv)
2397 {
2398 if (*argv) {
2399 error_msg("'ip rule show' does not take any arguments.");
2400 return 1;
2401 }
2402 send_nlmesg(RTM_GETRULE, NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST,
2403 ((TT.addressfamily != AF_UNSPEC) ? TT.addressfamily : AF_INET), NULL, 0);
2404 return filter_nlmesg(show_rules, argv);
2405 }
2406
iprule(char ** argv)2407 static int iprule(char **argv)
2408 {
2409 int idx;
2410 struct arglist options[] = {{"add", 0}, {"delete", 0}, {"list", 1},
2411 {"show", 1}, {NULL, -1}};
2412 cmdobj ipcmd, cmdobjlist[] = {ruleupdate, rulelist};
2413
2414 if (!*argv) idx = 1;
2415 else if ((idx = substring_to_idx(*argv++, options)) == -1)
2416 show_iprule_help();
2417 ipcmd = cmdobjlist[idx];
2418 return ipcmd(argv);
2419 }
2420 //============================================================================
2421 // code for ip tunnel.
2422 //============================================================================
show_iptunnel_help(void)2423 static void show_iptunnel_help(void)
2424 {
2425 char *errmsg = "usage: iptunnel { add | change | del | show } [NAME]\n"
2426 " [mode { ipip | gre | sit }] [remote ADDR] [local ADDR]\n"
2427 " [[i|o]seq] [[i|o]key KEY] [[i|o]csum] [ttl TTL]\n"
2428 " [tos TOS] [[no]pmtudisc] [dev PHYS_DEV]";
2429
2430 error_exit(errmsg);
2431 }
2432
tnl_ioctl(char * dev,int rtype,struct ip_tunnel_parm * ptnl)2433 static int tnl_ioctl(char *dev, int rtype, struct ip_tunnel_parm *ptnl)
2434 {
2435 struct ifreq req;
2436 int fd, ret = 0;
2437
2438 if ((rtype == SIOCCHGTUNNEL || rtype == SIOCDELTUNNEL) && *ptnl->name)
2439 xstrncpy(req.ifr_name, ptnl->name, IF_NAMESIZE);
2440 else xstrncpy(req.ifr_name, dev, IF_NAMESIZE);
2441
2442 if (rtype != SIOCGIFHWADDR) req.ifr_ifru.ifru_data = (void*)ptnl;
2443 fd = xsocket(AF_INET, SOCK_DGRAM, 0);
2444
2445 if (rtype == SIOCGETTUNNEL) ret = ioctl(fd, rtype, &req);
2446 else if (rtype == SIOCGIFHWADDR)
2447 ret = (ioctl(fd, rtype, &req) < 0) ? -1 : req.ifr_addr.sa_family;
2448 else xioctl(fd, rtype, &req);
2449
2450 close(fd);
2451 return ret;
2452 }
2453
display_tunnel(struct ip_tunnel_parm * ptnl)2454 static int display_tunnel(struct ip_tunnel_parm *ptnl)
2455 {
2456 char rmt_addr[64], lcl_addr[64], ikey_str[64], okey_str[64];
2457
2458 printf("%s: %s/ip", ptnl->name, ptnl->iph.protocol == IPPROTO_IPIP ? "ip" :
2459 (ptnl->iph.protocol == IPPROTO_GRE ? "gre" :
2460 (ptnl->iph.protocol == IPPROTO_IPV6 ? "ipv6" : "unknown")));
2461 printf(" remote %s local %s ", ptnl->iph.daddr ?
2462 inet_ntop(AF_INET, &ptnl->iph.daddr, rmt_addr, sizeof(rmt_addr)) : "any",
2463 ptnl->iph.saddr ? inet_ntop(AF_INET, &ptnl->iph.saddr, lcl_addr,
2464 sizeof(lcl_addr)) : "any");
2465 if (ptnl->link) {
2466 struct ifreq req;
2467 int fd;
2468
2469 req.ifr_ifindex = ptnl->link;
2470 fd = xsocket(AF_INET, SOCK_DGRAM, 0);
2471 if (ioctl(fd, SIOCGIFNAME, &req) < 0) perror_msg("SIOCGIFNAME");
2472 else printf(" dev %s ", req.ifr_name);
2473 close(fd);
2474 }
2475 if (ptnl->iph.ttl) printf(" ttl %d ", ptnl->iph.ttl);
2476 else printf(" ttl inherit ");
2477
2478 if (ptnl->iph.tos) {
2479 printf(" tos");
2480 if (ptnl->iph.tos & 1) printf(" inherit");
2481 if (ptnl->iph.tos & ~1) printf("%c%s ", ptnl->iph.tos & 1 ? '/' : ' ',
2482 namefromRPDB((ptnl->iph.tos & ~1), RPDB_rtdsfield));
2483 }
2484 if (!(ptnl->iph.frag_off & htons(IP_DF))) printf(" nopmtudisc");
2485 inet_ntop(AF_INET, &ptnl->i_key, ikey_str, sizeof(ikey_str));
2486 if ((ptnl->i_flags & GRE_KEY) && (ptnl->o_flags & GRE_KEY)
2487 && ptnl->o_key == ptnl->i_key) printf(" key %s", ikey_str);
2488 else if ((ptnl->i_flags | ptnl->o_flags) & GRE_KEY) {
2489 inet_ntop(AF_INET, &ptnl->o_key, okey_str, sizeof(okey_str));
2490 if (ptnl->i_flags & GRE_KEY) printf(" ikey %s ", ikey_str);
2491 if (ptnl->o_flags & GRE_KEY) printf(" okey %s ", okey_str);
2492 }
2493 if (ptnl->i_flags & GRE_SEQ) printf("\n Drop packets out of sequence.\n");
2494 if (ptnl->i_flags & GRE_CSUM)
2495 printf("\n Checksum in received packet is required.");
2496 if (ptnl->o_flags & GRE_SEQ) printf("\n Sequence packets on output.");
2497 if (ptnl->o_flags & GRE_CSUM) printf("\n Checksum output packets.");
2498 xputc('\n');
2499 return 0;
2500 }
2501
read_tunnel(struct ip_tunnel_parm * ptnl)2502 static int read_tunnel(struct ip_tunnel_parm *ptnl)
2503 {
2504 int count = 0;
2505 char iface[IF_NAMESIZE];
2506 struct ip_tunnel_parm iptnl;
2507 FILE *fp = xfopen("/proc/net/dev", "r");
2508
2509 while (fgets(toybuf, sizeof(toybuf), fp)) {
2510 char *ptr;
2511 int ret;
2512
2513 if (count++ < 2) continue; // 1st two lines are header.
2514
2515 ptr = strchr(toybuf, ':');
2516 if (!ptr || (*ptr++ = 0, sscanf(toybuf, "%s", iface) != 1))
2517 error_exit("invalid format of '/proc/net/dev'");
2518 if (*ptnl->name && strcmp(ptnl->name, iface)) continue;
2519 if ((ret = tnl_ioctl(iface, SIOCGIFHWADDR, &iptnl)) < 0) {
2520 error_msg("failed to get type of '%s'", iface);
2521 continue;
2522 }
2523 if (ret != ARPHRD_TUNNEL && ret != ARPHRD_SIT &&
2524 ret != ARPHRD_IPGRE) continue;
2525
2526 memset(&iptnl, 0, sizeof(iptnl));
2527 if (tnl_ioctl(iface, SIOCGETTUNNEL, &iptnl) < 0) continue;
2528 if ((ptnl->link && iptnl.link != ptnl->link) || (*ptnl->name &&
2529 strcmp(iptnl.name, ptnl->name)) || (ptnl->iph.daddr &&
2530 iptnl.iph.daddr != ptnl->iph.daddr) || (ptnl->iph.saddr &&
2531 iptnl.iph.saddr != ptnl->iph.saddr) || (ptnl->i_key &&
2532 iptnl.i_key != ptnl->i_key)) continue;
2533 display_tunnel(&iptnl);
2534 }
2535 fclose(fp);
2536 return 0;
2537 }
2538
parse_iptunnel_args(struct ip_tunnel_parm * ptnl,char ** argv,int ipt_opt_idx)2539 static void parse_iptunnel_args(struct ip_tunnel_parm *ptnl, char **argv,
2540 int ipt_opt_idx)
2541 {
2542 int idx;
2543 uint8_t af = AF_INET;
2544 uint32_t addr = 0;
2545 struct arglist opts[] = { {"mode", 0}, {"key", 1}, {"ikey", 2},
2546 {"okey", 3}, {"seq", 4}, {"iseq", 5}, {"oseq", 6}, {"csum", 7},
2547 {"icsum", 8}, {"ocsum", 9}, {"nopmtudisc", 10}, {"pmtudisc", 11},
2548 {"remote", 12}, {"local", 13},{"dev", 14}, {"ttl", 15}, {"tos", 16},
2549 {"dsfield", 17}, {"name", 18}, {NULL, -1}
2550 };
2551
2552 ptnl->iph.version = 4; // The value indicates the version of IP (4 or 6)
2553 ptnl->iph.ihl = 5; // Minimum Internet Header Length
2554 // frag_off is measured in units of 8 octets (64 bits)
2555 ptnl->iph.frag_off = htons(IP_DF);
2556 if (*argv && ipt_opt_idx <= 2 && string_to_idx(*argv, opts) == -1) {
2557 xstrncpy(ptnl->name, *argv, IF_NAMESIZE);
2558 if (ipt_opt_idx == 1) {
2559 struct ip_tunnel_parm iptnl_old;
2560
2561 memset(&iptnl_old, 0, sizeof(iptnl_old));
2562 tnl_ioctl(ptnl->name, SIOCGETTUNNEL, &iptnl_old);
2563 *ptnl = iptnl_old;
2564 }
2565 argv++;
2566 }
2567 for (; *argv; argv++, addr = 0) {
2568 switch (idx = string_to_idx(*argv, opts)) {
2569 case 0:
2570 if (!*++argv) error_exit("mode is missing");
2571 if ((!strcmp("ipip", *argv) || !strcmp("ip/ip", *argv)))
2572 ptnl->iph.protocol = IPPROTO_IPIP;
2573 else if ((!strcmp("gre", *argv) || !strcmp("gre/ip", *argv)))
2574 ptnl->iph.protocol = IPPROTO_GRE;
2575 else if ((!strcmp("sit", *argv) || !strcmp("ipv6/ip", *argv)))
2576 ptnl->iph.protocol = IPPROTO_IPV6;
2577 else show_iptunnel_help();
2578 break;
2579 case 1:
2580 case 2:
2581 case 3:
2582 {
2583 struct addrinfo *info, hint;
2584 int ret;
2585
2586 if (!*++argv) error_exit("key value is missing");
2587 memset(&hint, 0, sizeof(hint));
2588 hint.ai_family = AF_INET;
2589 ret = getaddrinfo(*argv, NULL, &hint, &info);
2590 if (ret || !info) error_exit("invalid argument to key");
2591 freeaddrinfo(info);
2592
2593 if (strchr(*argv, '.')) {
2594 if (get_prefix(&addr, &af, *argv, AF_INET))
2595 error_exit("invalid key '%s'", *argv);
2596 } else {
2597 unsigned key_val;
2598
2599 sscanf(*argv, "%u", &key_val);
2600 addr = htonl(key_val);
2601 }
2602 if (idx == 1) {
2603 ptnl->i_flags |= GRE_KEY;
2604 ptnl->o_flags |= GRE_KEY;
2605 ptnl->i_key = ptnl->o_key = addr;
2606 } else if (idx == 2) {
2607 ptnl->i_flags |= GRE_KEY;
2608 ptnl->i_key = addr;
2609 } else {
2610 ptnl->o_flags |= GRE_KEY;
2611 ptnl->o_key = addr;
2612 }
2613 }
2614 break;
2615 case 4:
2616 ptnl->i_flags |= GRE_SEQ;
2617 ptnl->o_flags |= GRE_SEQ;
2618 break;
2619 case 5:
2620 ptnl->i_flags |= GRE_SEQ;
2621 break;
2622 case 6:
2623 ptnl->o_flags |= GRE_SEQ;
2624 break;
2625 case 7:
2626 ptnl->i_flags |= GRE_CSUM;
2627 ptnl->o_flags |= GRE_CSUM;
2628 break;
2629 case 8:
2630 ptnl->i_flags |= GRE_CSUM;
2631 break;
2632 case 9:
2633 ptnl->o_flags |= GRE_CSUM;
2634 break;
2635 case 10:
2636 ptnl->iph.frag_off = 0;
2637 break;
2638 case 11:
2639 ptnl->iph.frag_off = htons(IP_DF);
2640 break;
2641 case 12:
2642 case 13:
2643 if (!*++argv) error_exit("remote/local address is missing");
2644 if (get_prefix(&addr, &af, *argv, AF_INET))
2645 error_exit("invalid remote/local address '%s'", *argv);
2646 (idx == 12) ? (ptnl->iph.daddr = addr) : (ptnl->iph.saddr = addr);
2647 break;
2648 case 14:
2649 if (!*++argv) error_exit("device name is missing");
2650 else {
2651 struct ifreq req;
2652 int fd;
2653
2654 xstrncpy(req.ifr_name, *argv, IFNAMSIZ);
2655 fd = xsocket(AF_INET, SOCK_DGRAM, 0);
2656 xioctl(fd, SIOCGIFINDEX, &req);
2657 close(fd);
2658 ptnl->link = req.ifr_ifindex;
2659 }
2660 break;
2661 case 15:
2662 if (!*++argv) error_exit("ttl value is missing");
2663 if (strcmp(*argv, "inherit"))
2664 ptnl->iph.ttl = atolx_range(*argv, 0, 255);
2665 break;
2666 case 16:
2667 case 17:
2668 if (!*++argv) error_exit("tos value is missing");
2669 if (strcmp(*argv, "inherit")) {
2670 char *ptr;
2671 unsigned long tval = strtoul(*argv, &ptr, 16);
2672
2673 if (tval > 255) error_exit("invalid tos value '%s'", *argv);
2674 if (*ptr) {
2675 int ret;
2676
2677 if ((ret = idxfromRPDB(*argv, RPDB_rtdsfield)) < 0)
2678 error_exit("invalid tos value");
2679 ptnl->iph.tos = ret;
2680 } else ptnl->iph.tos = tval;
2681 } else ptnl->iph.tos = 1;
2682 break;
2683 case 18:
2684 if (*ptnl->name) error_exit("invalid tunnel");
2685 else {
2686 if (!*++argv) error_exit("name is missing");
2687 xstrncpy(ptnl->name, *argv, IF_NAMESIZE);
2688 }
2689 break;
2690 default:
2691 if (*ptnl->name) error_exit("invalid tunnel");
2692 xstrncpy(ptnl->name, *argv, IF_NAMESIZE);
2693 break;
2694 }
2695 }
2696 if (ptnl->iph.protocol == IPPROTO_IPIP ||
2697 ptnl->iph.protocol == IPPROTO_IPV6) {
2698 if ((ptnl->i_flags & GRE_KEY) || (ptnl->o_flags & GRE_KEY))
2699 error_exit("[i|o]key is allowed with gre only");
2700 if ((ptnl->i_flags & GRE_SEQ) || (ptnl->o_flags & GRE_SEQ))
2701 error_exit("[i|o]seq is allowed with gre only");
2702 if ((ptnl->i_flags & GRE_CSUM) || (ptnl->o_flags & GRE_CSUM))
2703 error_exit("[i|o]csum is allowed with gre only");
2704 }
2705 if (!ptnl->i_key && IN_MULTICAST(ntohl(ptnl->iph.daddr))) {
2706 ptnl->i_key = ptnl->iph.daddr;
2707 ptnl->i_flags |= GRE_KEY;
2708 }
2709 if (!ptnl->o_key && IN_MULTICAST(ntohl(ptnl->iph.daddr))) {
2710 ptnl->o_key = ptnl->iph.daddr;
2711 ptnl->o_flags |= GRE_KEY;
2712 }
2713 if (IN_MULTICAST(ntohl(ptnl->iph.daddr)) && !ptnl->iph.saddr)
2714 error_exit("broadcast tunnel requires a source address");
2715 }
2716
tunnellist(char ** argv)2717 static int tunnellist(char **argv)
2718 {
2719 struct ip_tunnel_parm iptnl;
2720 int ret = 0;
2721
2722 memset(&iptnl, 0, sizeof(iptnl));
2723 parse_iptunnel_args(&iptnl, argv, 3);
2724
2725 if (iptnl.iph.protocol == IPPROTO_IPIP)
2726 ret = tnl_ioctl(*iptnl.name ? iptnl.name : "tunl0", SIOCGETTUNNEL, &iptnl);
2727 else if (iptnl.iph.protocol == IPPROTO_GRE)
2728 ret = tnl_ioctl(*iptnl.name ? iptnl.name : "gre0", SIOCGETTUNNEL, &iptnl);
2729 else if (iptnl.iph.protocol == IPPROTO_IPV6)
2730 ret = tnl_ioctl(*iptnl.name ? iptnl.name : "sit0", SIOCGETTUNNEL, &iptnl);
2731 else return read_tunnel(&iptnl);
2732
2733 if (ret < 0) {
2734 perror_msg("SIOCGETTUNNEL");
2735 return ret;
2736 } else return display_tunnel(&iptnl);
2737 }
2738
2739 // Performing add, change, & delete tunnel action, according to passed req_type
tunnelupdate(char ** argv)2740 static int tunnelupdate(char **argv)
2741 {
2742 struct ip_tunnel_parm iptnl;
2743 int idx = 2, rtype = SIOCDELTUNNEL;
2744
2745 if (*argv[-1] == 'a') {
2746 idx = 0;
2747 rtype = SIOCADDTUNNEL;
2748 } else if (*argv[-1] == 'c') {
2749 idx = 1;
2750 rtype = SIOCCHGTUNNEL;
2751 }
2752
2753 memset(&iptnl, 0, sizeof(iptnl));
2754 parse_iptunnel_args(&iptnl, argv, idx);
2755 if (idx != 2 && iptnl.iph.ttl && !(iptnl.iph.frag_off))
2756 error_exit("ttl > 0 and nopmtudisc are incompatible");
2757 if (iptnl.iph.protocol == IPPROTO_IPIP)
2758 return (tnl_ioctl("tunl0", rtype, &iptnl) < 0) ? 1 : 0;
2759 else if (iptnl.iph.protocol == IPPROTO_GRE)
2760 return (tnl_ioctl("gre0", rtype, &iptnl) < 0) ? 1 : 0;
2761 else if (iptnl.iph.protocol == IPPROTO_IPV6)
2762 return (tnl_ioctl("sit0", rtype, &iptnl) < 0) ? 1 : 0;
2763 else {
2764 if (idx != 2) error_exit("invalid tunnel mode");
2765 return (tnl_ioctl(iptnl.name, rtype, &iptnl) < 0) ? 1 : 0;
2766 }
2767 }
2768
iptunnel(char ** argv)2769 static int iptunnel(char **argv)
2770 {
2771 int idx;
2772 struct arglist opts[] = {{"add", 0}, {"change", 0}, {"del", 0},
2773 {"delete", 0}, {"show", 1}, {"list", 1}, {"lst", 1}, {NULL, -1}
2774 };
2775 cmdobj ipcmd, cmdobjlist[] = {tunnelupdate, tunnellist};
2776
2777 if (!*argv) idx = 1;
2778 else if ((idx = substring_to_idx(*argv++, opts)) == -1)
2779 show_iptunnel_help();
2780 ipcmd = cmdobjlist[idx];
2781 return ipcmd(argv);
2782 }
2783
2784 // ===========================================================================
2785 // Common code, which is used for all ip options.
2786 // ===========================================================================
2787
2788 // Parse netlink messages and call input callback handler for action
filter_nlmesg(int (* fun)(struct nlmsghdr * mhdr,char ** argv),char ** argv)2789 static int filter_nlmesg(int (*fun)(struct nlmsghdr *mhdr, char **argv),
2790 char **argv)
2791 {
2792 while (1) {
2793 struct nlmsghdr *mhdr;
2794 int msglen = recv(TT.sockfd, TT.gbuf, MESG_LEN, 0);
2795
2796 if ((msglen < 0) && (errno == EINTR || errno == EAGAIN)) continue;
2797 else if (msglen < 0) {
2798 error_msg("netlink receive error %s", strerror(errno));
2799 return 1;
2800 } else if (!msglen) {
2801 error_msg("EOF on netlink");
2802 return 1;
2803 }
2804
2805 for (mhdr = (struct nlmsghdr*)TT.gbuf; NLMSG_OK(mhdr, msglen);
2806 mhdr = NLMSG_NEXT(mhdr, msglen)) {
2807 int err;
2808 if (mhdr->nlmsg_pid != getpid())
2809 continue;
2810 switch (mhdr->nlmsg_type) {
2811 case NLMSG_DONE:
2812 return 0;
2813 case NLMSG_ERROR:
2814 {
2815 struct nlmsgerr *merr = (struct nlmsgerr*)NLMSG_DATA(mhdr);
2816
2817 if (merr->error == 0) return 0;
2818 if (mhdr->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
2819 error_msg("ERROR truncated");
2820 else {
2821 errno = -merr->error;
2822 perror_msg("RTNETLINK answers");
2823 }
2824 return 1;
2825 }
2826 default:
2827 if (fun && (err = fun(mhdr, argv))) return err;
2828 break;
2829 }
2830 } // End of for loop.
2831 } // End of while loop.
2832 return 0;
2833 }
2834
ip_main(void)2835 void ip_main(void)
2836 {
2837 char **optargv = toys.argv;
2838 int idx, isip = !(toys.which->name[2]); //1 -> if only ip
2839 cmdobj ipcmd, cmdobjlist[] = {ipaddr, iplink, iproute, iprule, iptunnel};
2840
2841 for (++optargv; *optargv; ++optargv) {
2842 char *ptr = *optargv;
2843 struct arglist ip_options[] = {{"oneline", 0}, {"family", 1},
2844 {"4", 1}, {"6", 1}, {"0", 1}, {"stats", 2}, {NULL, -1}};
2845
2846 if (*ptr != '-') break;
2847 else if ((*(ptr+1) == '-') && (*(ptr+2))) ptr +=2;
2848 //escape "--" and stop ip arg parsing.
2849 else if ((*(ptr+1) == '-') && (!*(ptr+2))) {
2850 *ptr +=1;
2851 break;
2852 } else ptr +=1;
2853 switch (substring_to_idx(ptr, ip_options)) {
2854 case 0: TT.singleline = 1;
2855 break;
2856 case 1: {
2857 if (isdigit(*ptr)) {
2858 long num = atolx(ptr);
2859 if (num == 4) TT.addressfamily = AF_INET;
2860 else if (num == 6) TT.addressfamily = AF_INET6;
2861 else TT.addressfamily = AF_PACKET;
2862 } else {
2863 struct arglist ip_aflist[] = {{"inet", AF_INET},
2864 {"inet6", AF_INET6}, {"link", AF_PACKET}, {NULL, -1}};
2865
2866 if (!*++optargv) help_exit(0);
2867 if ((TT.addressfamily = string_to_idx(*optargv, ip_aflist)) == -1)
2868 error_exit("wrong family '%s'", *optargv);
2869 }
2870 }
2871 break;
2872 case 2:
2873 TT.stats++;
2874 break;
2875 default: help_exit(0);
2876 break; // unreachable code.
2877 }
2878 }
2879
2880 TT.sockfd = xsocket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2881
2882 if (isip) {// only for ip
2883 if (*optargv) {
2884 struct arglist ip_objectlist[] = { {"address", 0}, {"link", 1},
2885 {"route", 2}, {"rule", 3}, {"tunnel", 4}, {"tunl", 4}, {NULL, -1}};
2886
2887 if ((idx = substring_to_idx(*optargv, ip_objectlist)) == -1) help_exit(0);
2888 ipcmd = cmdobjlist[idx];
2889 toys.exitval = ipcmd(++optargv);
2890 } else help_exit(0);
2891 } else {
2892 struct arglist ip_objectlist[] = { {"ipaddr", 0}, {"iplink", 1},
2893 {"iproute", 2}, {"iprule", 3}, {"iptunnel", 4}, {NULL, -1}};
2894 if ((idx = string_to_idx(toys.which->name, ip_objectlist)) == -1)
2895 help_exit(0);
2896 ipcmd = cmdobjlist[idx];
2897 toys.exitval = ipcmd(optargv);
2898 }
2899 xclose(TT.sockfd);
2900 if (rtdsfield_init) free_alist(rt_dsfield);
2901 if (rtrealms_init) free_alist(rt_realms);
2902 if (rtscope_init) free_alist(rt_scope);
2903 if (rttable_init) free_alist(rt_tables);
2904 if (rtprotos_init) free_alist(rt_protos);
2905 }
2906