Bernhard Reutner-Fischer | dac7ff1 | 2006-04-12 17:55:51 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | ec45595 | 2001-02-14 08:11:27 +0000 | [diff] [blame] | 2 | /* route |
| 3 | * |
| 4 | * Similar to the standard Unix route, but with only the necessary |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 5 | * parts for AF_INET and AF_INET6 |
Eric Andersen | ec45595 | 2001-02-14 08:11:27 +0000 | [diff] [blame] | 6 | * |
| 7 | * Bjorn Wesen, Axis Communications AB |
| 8 | * |
Eric Andersen | b940850 | 2001-09-05 19:32:00 +0000 | [diff] [blame] | 9 | * Author of the original route: |
Eric Andersen | ec45595 | 2001-02-14 08:11:27 +0000 | [diff] [blame] | 10 | * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> |
| 11 | * (derived from FvK's 'route.c 1.70 01/04/94') |
| 12 | * |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame] | 13 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
Eric Andersen | ec45595 | 2001-02-14 08:11:27 +0000 | [diff] [blame] | 14 | * |
Eric Andersen | ec45595 | 2001-02-14 08:11:27 +0000 | [diff] [blame] | 15 | * |
Eric Andersen | 68be2ab | 2001-02-14 19:26:39 +0000 | [diff] [blame] | 16 | * displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru> |
Eric Andersen | 26d53eb | 2001-03-07 06:33:01 +0000 | [diff] [blame] | 17 | * adjustments by Larry Doolittle <LRDoolittle@lbl.gov> |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 18 | * |
| 19 | * IPV6 support added by Bart Visscher <magick@linux-fan.com> |
Eric Andersen | ec45595 | 2001-02-14 08:11:27 +0000 | [diff] [blame] | 20 | */ |
| 21 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 22 | /* 2004/03/09 Manuel Novoa III <mjn3@codepoet.org> |
| 23 | * |
| 24 | * Rewritten to fix several bugs, add additional error checking, and |
| 25 | * remove ridiculous amounts of bloat. |
| 26 | */ |
Denys Vlasenko | 47367e1 | 2016-11-23 09:05:14 +0100 | [diff] [blame] | 27 | //config:config ROUTE |
| 28 | //config: bool "route" |
| 29 | //config: default y |
| 30 | //config: select PLATFORM_LINUX |
| 31 | //config: help |
| 32 | //config: Route displays or manipulates the kernel's IP routing tables. |
| 33 | |
| 34 | //applet:IF_ROUTE(APPLET(route, BB_DIR_SBIN, BB_SUID_DROP)) |
| 35 | |
| 36 | //kbuild:lib-$(CONFIG_ROUTE) += route.o |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 37 | |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 38 | //usage:#define route_trivial_usage |
| 39 | //usage: "[{add|del|delete}]" |
| 40 | //usage:#define route_full_usage "\n\n" |
| 41 | //usage: "Edit kernel routing tables\n" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 42 | //usage: "\n -n Don't resolve names" |
| 43 | //usage: "\n -e Display other/more information" |
| 44 | //usage: "\n -A inet" IF_FEATURE_IPV6("{6}") " Select address family" |
| 45 | |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 46 | #include <net/route.h> |
| 47 | #include <net/if.h> |
| 48 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 49 | #include "libbb.h" |
| 50 | #include "inet_common.h" |
| 51 | |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 52 | |
Eric Andersen | 863a3e1 | 2001-08-27 17:57:27 +0000 | [diff] [blame] | 53 | #ifndef RTF_UP |
| 54 | /* Keep this in sync with /usr/src/linux/include/linux/route.h */ |
Glenn L McGrath | 7c58e9b | 2002-08-22 18:24:43 +0000 | [diff] [blame] | 55 | #define RTF_UP 0x0001 /* route usable */ |
| 56 | #define RTF_GATEWAY 0x0002 /* destination is a gateway */ |
| 57 | #define RTF_HOST 0x0004 /* host entry (net otherwise) */ |
| 58 | #define RTF_REINSTATE 0x0008 /* reinstate route after tmout */ |
| 59 | #define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */ |
| 60 | #define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */ |
| 61 | #define RTF_MTU 0x0040 /* specific MTU for this route */ |
Eric Andersen | 863a3e1 | 2001-08-27 17:57:27 +0000 | [diff] [blame] | 62 | #ifndef RTF_MSS |
Glenn L McGrath | 7c58e9b | 2002-08-22 18:24:43 +0000 | [diff] [blame] | 63 | #define RTF_MSS RTF_MTU /* Compatibility :-( */ |
Eric Andersen | 863a3e1 | 2001-08-27 17:57:27 +0000 | [diff] [blame] | 64 | #endif |
Glenn L McGrath | 7c58e9b | 2002-08-22 18:24:43 +0000 | [diff] [blame] | 65 | #define RTF_WINDOW 0x0080 /* per route window clamping */ |
| 66 | #define RTF_IRTT 0x0100 /* Initial round trip time */ |
| 67 | #define RTF_REJECT 0x0200 /* Reject route */ |
Denys Vlasenko | 09020b1 | 2015-02-03 19:32:44 +0100 | [diff] [blame] | 68 | #define RTF_NONEXTHOP 0x00200000 /* route with no nexthop */ |
Eric Andersen | 863a3e1 | 2001-08-27 17:57:27 +0000 | [diff] [blame] | 69 | #endif |
| 70 | |
Denis Vlasenko | ff131b9 | 2007-04-10 15:42:06 +0000 | [diff] [blame] | 71 | #if defined(SIOCADDRTOLD) || defined(RTF_IRTT) /* route */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 72 | #define HAVE_NEW_ADDRT 1 |
| 73 | #endif |
| 74 | |
| 75 | #if HAVE_NEW_ADDRT |
| 76 | #define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr) |
| 77 | #define full_mask(x) (x) |
| 78 | #else |
| 79 | #define mask_in_addr(x) ((x).rt_genmask) |
| 80 | #define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr) |
| 81 | #endif |
| 82 | |
| 83 | /* The RTACTION entries must agree with tbl_verb[] below! */ |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 84 | #define RTACTION_ADD 1 |
| 85 | #define RTACTION_DEL 2 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 86 | |
| 87 | /* For the various tbl_*[] arrays, the 1st byte is the offset to |
| 88 | * the next entry and the 2nd byte is return value. */ |
| 89 | |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 90 | #define NET_FLAG 1 |
| 91 | #define HOST_FLAG 2 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 92 | |
| 93 | /* We remap '-' to '#' to avoid problems with getopt. */ |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 94 | static const char tbl_hash_net_host[] ALIGN1 = |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 95 | "\007\001#net\0" |
Tim Riker | c1ef7bd | 2006-01-25 00:08:53 +0000 | [diff] [blame] | 96 | /* "\010\002#host\0" */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 97 | "\007\002#host" /* Since last, we can save a byte. */ |
| 98 | ; |
| 99 | |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 100 | #define KW_TAKES_ARG 020 |
| 101 | #define KW_SETS_FLAG 040 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 102 | |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 103 | #define KW_IPVx_METRIC 020 |
| 104 | #define KW_IPVx_NETMASK 021 |
| 105 | #define KW_IPVx_GATEWAY 022 |
| 106 | #define KW_IPVx_MSS 023 |
| 107 | #define KW_IPVx_WINDOW 024 |
| 108 | #define KW_IPVx_IRTT 025 |
| 109 | #define KW_IPVx_DEVICE 026 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 110 | |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 111 | #define KW_IPVx_FLAG_ONLY 040 |
| 112 | #define KW_IPVx_REJECT 040 |
| 113 | #define KW_IPVx_MOD 041 |
| 114 | #define KW_IPVx_DYN 042 |
| 115 | #define KW_IPVx_REINSTATE 043 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 116 | |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 117 | static const char tbl_ipvx[] ALIGN1 = |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 118 | /* 020 is the "takes an arg" bit */ |
| 119 | #if HAVE_NEW_ADDRT |
| 120 | "\011\020metric\0" |
| 121 | #endif |
| 122 | "\012\021netmask\0" |
| 123 | "\005\022gw\0" |
| 124 | "\012\022gateway\0" |
| 125 | "\006\023mss\0" |
| 126 | "\011\024window\0" |
| 127 | #ifdef RTF_IRTT |
| 128 | "\007\025irtt\0" |
| 129 | #endif |
| 130 | "\006\026dev\0" |
| 131 | "\011\026device\0" |
| 132 | /* 040 is the "sets a flag" bit - MUST match flags_ipvx[] values below. */ |
| 133 | #ifdef RTF_REJECT |
| 134 | "\011\040reject\0" |
| 135 | #endif |
| 136 | "\006\041mod\0" |
| 137 | "\006\042dyn\0" |
Tim Riker | c1ef7bd | 2006-01-25 00:08:53 +0000 | [diff] [blame] | 138 | /* "\014\043reinstate\0" */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 139 | "\013\043reinstate" /* Since last, we can save a byte. */ |
| 140 | ; |
| 141 | |
Denys Vlasenko | 09020b1 | 2015-02-03 19:32:44 +0100 | [diff] [blame] | 142 | static const uint16_t flags_ipvx[] = { /* MUST match tbl_ipvx[] values above. */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 143 | #ifdef RTF_REJECT |
| 144 | RTF_REJECT, |
| 145 | #endif |
| 146 | RTF_MODIFIED, |
| 147 | RTF_DYNAMIC, |
| 148 | RTF_REINSTATE |
| 149 | }; |
| 150 | |
| 151 | static int kw_lookup(const char *kwtbl, char ***pargs) |
| 152 | { |
| 153 | if (**pargs) { |
| 154 | do { |
| 155 | if (strcmp(kwtbl+2, **pargs) == 0) { /* Found a match. */ |
| 156 | *pargs += 1; |
| 157 | if (kwtbl[1] & KW_TAKES_ARG) { |
| 158 | if (!**pargs) { /* No more args! */ |
| 159 | bb_show_usage(); |
| 160 | } |
| 161 | *pargs += 1; /* Calling routine will use args[-1]. */ |
| 162 | } |
| 163 | return kwtbl[1]; |
| 164 | } |
| 165 | kwtbl += *kwtbl; |
| 166 | } while (*kwtbl); |
| 167 | } |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | /* Add or delete a route, depending on action. */ |
| 172 | |
Denys Vlasenko | adf922e | 2009-10-08 14:35:37 +0200 | [diff] [blame] | 173 | static NOINLINE void INET_setroute(int action, char **args) |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 174 | { |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 175 | /* char buffer instead of bona-fide struct avoids aliasing warning */ |
| 176 | char rt_buf[sizeof(struct rtentry)]; |
| 177 | struct rtentry *const rt = (void *)rt_buf; |
| 178 | |
Eric Andersen | 0cb6f35 | 2006-01-30 22:30:41 +0000 | [diff] [blame] | 179 | const char *netmask = NULL; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 180 | int skfd, isnet, xflag; |
| 181 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 182 | /* Grab the -net or -host options. Remember they were transformed. */ |
| 183 | xflag = kw_lookup(tbl_hash_net_host, &args); |
| 184 | |
| 185 | /* If we did grab -net or -host, make sure we still have an arg left. */ |
| 186 | if (*args == NULL) { |
| 187 | bb_show_usage(); |
| 188 | } |
| 189 | |
| 190 | /* Clean out the RTREQ structure. */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 191 | memset(rt, 0, sizeof(*rt)); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 192 | |
| 193 | { |
| 194 | const char *target = *args++; |
"Vladimir N. Oleynik" | 5775aa2 | 2006-01-25 16:17:58 +0000 | [diff] [blame] | 195 | char *prefix; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 196 | |
"Vladimir N. Oleynik" | 5775aa2 | 2006-01-25 16:17:58 +0000 | [diff] [blame] | 197 | /* recognize x.x.x.x/mask format. */ |
| 198 | prefix = strchr(target, '/'); |
Denis Vlasenko | 51742f4 | 2007-04-12 00:32:05 +0000 | [diff] [blame] | 199 | if (prefix) { |
"Vladimir N. Oleynik" | 5775aa2 | 2006-01-25 16:17:58 +0000 | [diff] [blame] | 200 | int prefix_len; |
| 201 | |
Denis Vlasenko | 1385899 | 2006-10-08 12:49:22 +0000 | [diff] [blame] | 202 | prefix_len = xatoul_range(prefix+1, 0, 32); |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 203 | mask_in_addr(*rt) = htonl( ~(0xffffffffUL >> prefix_len)); |
"Vladimir N. Oleynik" | 5775aa2 | 2006-01-25 16:17:58 +0000 | [diff] [blame] | 204 | *prefix = '\0'; |
| 205 | #if HAVE_NEW_ADDRT |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 206 | rt->rt_genmask.sa_family = AF_INET; |
"Vladimir N. Oleynik" | 5775aa2 | 2006-01-25 16:17:58 +0000 | [diff] [blame] | 207 | #endif |
| 208 | } else { |
| 209 | /* Default netmask. */ |
Denys Vlasenko | 0004e99 | 2010-09-01 12:01:17 +0200 | [diff] [blame] | 210 | netmask = "default"; |
"Vladimir N. Oleynik" | 5775aa2 | 2006-01-25 16:17:58 +0000 | [diff] [blame] | 211 | } |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 212 | /* Prefer hostname lookup is -host flag (xflag==1) was given. */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 213 | isnet = INET_resolve(target, (struct sockaddr_in *) &rt->rt_dst, |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 214 | (xflag & HOST_FLAG)); |
| 215 | if (isnet < 0) { |
| 216 | bb_error_msg_and_die("resolving %s", target); |
| 217 | } |
Denis Vlasenko | 51742f4 | 2007-04-12 00:32:05 +0000 | [diff] [blame] | 218 | if (prefix) { |
"Vladimir N. Oleynik" | 5775aa2 | 2006-01-25 16:17:58 +0000 | [diff] [blame] | 219 | /* do not destroy prefix for process args */ |
| 220 | *prefix = '/'; |
| 221 | } |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | if (xflag) { /* Reinit isnet if -net or -host was specified. */ |
| 225 | isnet = (xflag & NET_FLAG); |
| 226 | } |
| 227 | |
| 228 | /* Fill in the other fields. */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 229 | rt->rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST)); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 230 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 231 | while (*args) { |
| 232 | int k = kw_lookup(tbl_ipvx, &args); |
| 233 | const char *args_m1 = args[-1]; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 234 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 235 | if (k & KW_IPVx_FLAG_ONLY) { |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 236 | rt->rt_flags |= flags_ipvx[k & 3]; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 237 | continue; |
| 238 | } |
| 239 | |
| 240 | #if HAVE_NEW_ADDRT |
| 241 | if (k == KW_IPVx_METRIC) { |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 242 | rt->rt_metric = xatoul(args_m1) + 1; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 243 | continue; |
| 244 | } |
| 245 | #endif |
| 246 | |
| 247 | if (k == KW_IPVx_NETMASK) { |
| 248 | struct sockaddr mask; |
| 249 | |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 250 | if (mask_in_addr(*rt)) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 251 | bb_show_usage(); |
| 252 | } |
| 253 | |
| 254 | netmask = args_m1; |
| 255 | isnet = INET_resolve(netmask, (struct sockaddr_in *) &mask, 0); |
| 256 | if (isnet < 0) { |
| 257 | bb_error_msg_and_die("resolving %s", netmask); |
| 258 | } |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 259 | rt->rt_genmask = full_mask(mask); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 260 | continue; |
| 261 | } |
| 262 | |
| 263 | if (k == KW_IPVx_GATEWAY) { |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 264 | if (rt->rt_flags & RTF_GATEWAY) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 265 | bb_show_usage(); |
| 266 | } |
| 267 | |
| 268 | isnet = INET_resolve(args_m1, |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 269 | (struct sockaddr_in *) &rt->rt_gateway, 1); |
| 270 | rt->rt_flags |= RTF_GATEWAY; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 271 | |
| 272 | if (isnet) { |
| 273 | if (isnet < 0) { |
| 274 | bb_error_msg_and_die("resolving %s", args_m1); |
| 275 | } |
| 276 | bb_error_msg_and_die("gateway %s is a NETWORK", args_m1); |
| 277 | } |
| 278 | continue; |
| 279 | } |
| 280 | |
| 281 | if (k == KW_IPVx_MSS) { /* Check valid MSS bounds. */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 282 | rt->rt_flags |= RTF_MSS; |
| 283 | rt->rt_mss = xatoul_range(args_m1, 64, 32768); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 284 | continue; |
| 285 | } |
| 286 | |
| 287 | if (k == KW_IPVx_WINDOW) { /* Check valid window bounds. */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 288 | rt->rt_flags |= RTF_WINDOW; |
| 289 | rt->rt_window = xatoul_range(args_m1, 128, INT_MAX); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 290 | continue; |
| 291 | } |
| 292 | |
| 293 | #ifdef RTF_IRTT |
| 294 | if (k == KW_IPVx_IRTT) { |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 295 | rt->rt_flags |= RTF_IRTT; |
| 296 | rt->rt_irtt = xatoul(args_m1); |
Bartosz Golaszewski | 5d2e409 | 2014-06-22 14:01:13 +0200 | [diff] [blame] | 297 | rt->rt_irtt *= (bb_clk_tck() / 100); /* FIXME */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 298 | #if 0 /* FIXME: do we need to check anything of this? */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 299 | if (rt->rt_irtt < 1 || rt->rt_irtt > (120 * HZ)) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 300 | bb_error_msg_and_die("bad irtt"); |
| 301 | } |
| 302 | #endif |
| 303 | continue; |
| 304 | } |
| 305 | #endif |
| 306 | |
| 307 | /* Device is special in that it can be the last arg specified |
Denys Vlasenko | e695ac9 | 2016-07-19 17:48:55 +0200 | [diff] [blame] | 308 | * and doesn't require the dev/device keyword in that case. */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 309 | if (!rt->rt_dev && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) { |
Manuel Novoa III | 539fa95 | 2004-03-19 23:27:08 +0000 | [diff] [blame] | 310 | /* Don't use args_m1 here since args may have changed! */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 311 | rt->rt_dev = args[-1]; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 312 | continue; |
| 313 | } |
| 314 | |
| 315 | /* Nothing matched. */ |
| 316 | bb_show_usage(); |
| 317 | } |
| 318 | |
| 319 | #ifdef RTF_REJECT |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 320 | if ((rt->rt_flags & RTF_REJECT) && !rt->rt_dev) { |
| 321 | rt->rt_dev = (char*)"lo"; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 322 | } |
| 323 | #endif |
| 324 | |
| 325 | /* sanity checks.. */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 326 | if (mask_in_addr(*rt)) { |
| 327 | uint32_t mask = mask_in_addr(*rt); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 328 | |
| 329 | mask = ~ntohl(mask); |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 330 | if ((rt->rt_flags & RTF_HOST) && mask != 0xffffffff) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 331 | bb_error_msg_and_die("netmask %.8x and host route conflict", |
| 332 | (unsigned int) mask); |
| 333 | } |
| 334 | if (mask & (mask + 1)) { |
| 335 | bb_error_msg_and_die("bogus netmask %s", netmask); |
| 336 | } |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 337 | mask = ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr; |
| 338 | if (mask & ~(uint32_t)mask_in_addr(*rt)) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 339 | bb_error_msg_and_die("netmask and route address conflict"); |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | /* Fill out netmask if still unset */ |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 344 | if ((action == RTACTION_ADD) && (rt->rt_flags & RTF_HOST)) { |
| 345 | mask_in_addr(*rt) = 0xffffffff; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | /* Create a socket to the INET kernel. */ |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 349 | skfd = xsocket(AF_INET, SOCK_DGRAM, 0); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 350 | |
Denis Vlasenko | fb79a2e | 2007-07-14 22:07:14 +0000 | [diff] [blame] | 351 | if (action == RTACTION_ADD) |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 352 | xioctl(skfd, SIOCADDRT, rt); |
Denis Vlasenko | fb79a2e | 2007-07-14 22:07:14 +0000 | [diff] [blame] | 353 | else |
Denys Vlasenko | b3b6c8b | 2011-01-20 11:29:00 +0100 | [diff] [blame] | 354 | xioctl(skfd, SIOCDELRT, rt); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 355 | |
Rob Landley | 6417564 | 2005-08-22 15:57:50 +0000 | [diff] [blame] | 356 | if (ENABLE_FEATURE_CLEAN_UP) close(skfd); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 357 | } |
| 358 | |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 359 | #if ENABLE_FEATURE_IPV6 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 360 | |
Denys Vlasenko | adf922e | 2009-10-08 14:35:37 +0200 | [diff] [blame] | 361 | static NOINLINE void INET6_setroute(int action, char **args) |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 362 | { |
| 363 | struct sockaddr_in6 sa6; |
| 364 | struct in6_rtmsg rt; |
| 365 | int prefix_len, skfd; |
| 366 | const char *devname; |
| 367 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 368 | /* We know args isn't NULL from the check in route_main. */ |
| 369 | const char *target = *args++; |
| 370 | |
Denys Vlasenko | 0004e99 | 2010-09-01 12:01:17 +0200 | [diff] [blame] | 371 | if (strcmp(target, "default") == 0) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 372 | prefix_len = 0; |
| 373 | memset(&sa6, 0, sizeof(sa6)); |
| 374 | } else { |
| 375 | char *cp; |
Denis Vlasenko | 1bec1b9 | 2007-11-06 02:23:39 +0000 | [diff] [blame] | 376 | cp = strchr(target, '/'); /* Yes... const to non is ok. */ |
| 377 | if (cp) { |
| 378 | *cp = '\0'; |
| 379 | prefix_len = xatoul_range(cp + 1, 0, 128); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 380 | } else { |
| 381 | prefix_len = 128; |
| 382 | } |
| 383 | if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) { |
| 384 | bb_error_msg_and_die("resolving %s", target); |
| 385 | } |
| 386 | } |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 387 | |
| 388 | /* Clean out the RTREQ structure. */ |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 389 | memset(&rt, 0, sizeof(rt)); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 390 | |
| 391 | memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr)); |
| 392 | |
| 393 | /* Fill in the other fields. */ |
| 394 | rt.rtmsg_dst_len = prefix_len; |
| 395 | rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP); |
| 396 | rt.rtmsg_metric = 1; |
| 397 | |
| 398 | devname = NULL; |
| 399 | |
| 400 | while (*args) { |
| 401 | int k = kw_lookup(tbl_ipvx, &args); |
| 402 | const char *args_m1 = args[-1]; |
| 403 | |
| 404 | if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) { |
| 405 | rt.rtmsg_flags |= flags_ipvx[k & 3]; |
| 406 | continue; |
| 407 | } |
| 408 | |
| 409 | if (k == KW_IPVx_METRIC) { |
Denis Vlasenko | 1385899 | 2006-10-08 12:49:22 +0000 | [diff] [blame] | 410 | rt.rtmsg_metric = xatoul(args_m1); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 411 | continue; |
| 412 | } |
| 413 | |
| 414 | if (k == KW_IPVx_GATEWAY) { |
| 415 | if (rt.rtmsg_flags & RTF_GATEWAY) { |
| 416 | bb_show_usage(); |
| 417 | } |
| 418 | |
| 419 | if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) { |
| 420 | bb_error_msg_and_die("resolving %s", args_m1); |
| 421 | } |
| 422 | memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr, |
Denys Vlasenko | 6967578 | 2013-01-14 01:34:48 +0100 | [diff] [blame] | 423 | sizeof(struct in6_addr)); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 424 | rt.rtmsg_flags |= RTF_GATEWAY; |
| 425 | continue; |
| 426 | } |
| 427 | |
| 428 | /* Device is special in that it can be the last arg specified |
Denys Vlasenko | e695ac9 | 2016-07-19 17:48:55 +0200 | [diff] [blame] | 429 | * and doesn't require the dev/device keyword in that case. */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 430 | if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) { |
Manuel Novoa III | 539fa95 | 2004-03-19 23:27:08 +0000 | [diff] [blame] | 431 | /* Don't use args_m1 here since args may have changed! */ |
| 432 | devname = args[-1]; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 433 | continue; |
| 434 | } |
| 435 | |
| 436 | /* Nothing matched. */ |
| 437 | bb_show_usage(); |
| 438 | } |
| 439 | |
| 440 | /* Create a socket to the INET6 kernel. */ |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 441 | skfd = xsocket(AF_INET6, SOCK_DGRAM, 0); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 442 | |
| 443 | rt.rtmsg_ifindex = 0; |
| 444 | |
| 445 | if (devname) { |
| 446 | struct ifreq ifr; |
| 447 | memset(&ifr, 0, sizeof(ifr)); |
Denis Vlasenko | 360d966 | 2008-12-02 18:18:50 +0000 | [diff] [blame] | 448 | strncpy_IFNAMSIZ(ifr.ifr_name, devname); |
Denys Vlasenko | 31dc860 | 2013-01-20 18:10:12 +0100 | [diff] [blame] | 449 | xioctl(skfd, SIOCGIFINDEX, &ifr); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 450 | rt.rtmsg_ifindex = ifr.ifr_ifindex; |
| 451 | } |
| 452 | |
| 453 | /* Tell the kernel to accept this route. */ |
Denis Vlasenko | fb79a2e | 2007-07-14 22:07:14 +0000 | [diff] [blame] | 454 | if (action == RTACTION_ADD) |
| 455 | xioctl(skfd, SIOCADDRT, &rt); |
| 456 | else |
| 457 | xioctl(skfd, SIOCDELRT, &rt); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 458 | |
Rob Landley | 6417564 | 2005-08-22 15:57:50 +0000 | [diff] [blame] | 459 | if (ENABLE_FEATURE_CLEAN_UP) close(skfd); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 460 | } |
| 461 | #endif |
| 462 | |
Denys Vlasenko | 09020b1 | 2015-02-03 19:32:44 +0100 | [diff] [blame] | 463 | static const |
| 464 | IF_NOT_FEATURE_IPV6(uint16_t) |
| 465 | IF_FEATURE_IPV6(unsigned) |
| 466 | flagvals[] = { /* Must agree with flagchars[]. */ |
| 467 | RTF_UP, |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 468 | RTF_GATEWAY, |
| 469 | RTF_HOST, |
| 470 | RTF_REINSTATE, |
| 471 | RTF_DYNAMIC, |
| 472 | RTF_MODIFIED, |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 473 | #if ENABLE_FEATURE_IPV6 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 474 | RTF_DEFAULT, |
| 475 | RTF_ADDRCONF, |
Denys Vlasenko | 09020b1 | 2015-02-03 19:32:44 +0100 | [diff] [blame] | 476 | RTF_CACHE, |
| 477 | RTF_REJECT, |
| 478 | RTF_NONEXTHOP, /* this one doesn't fit into 16 bits */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 479 | #endif |
| 480 | }; |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 481 | /* Must agree with flagvals[]. */ |
| 482 | static const char flagchars[] ALIGN1 = |
Denys Vlasenko | 09020b1 | 2015-02-03 19:32:44 +0100 | [diff] [blame] | 483 | "UGHRDM" |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 484 | #if ENABLE_FEATURE_IPV6 |
Denys Vlasenko | 09020b1 | 2015-02-03 19:32:44 +0100 | [diff] [blame] | 485 | "DAC!n" |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 486 | #endif |
| 487 | ; |
Denys Vlasenko | 09020b1 | 2015-02-03 19:32:44 +0100 | [diff] [blame] | 488 | #define IPV4_MASK (RTF_UP|RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED) |
| 489 | #define IPV6_MASK (RTF_UP|RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE|RTF_REJECT|RTF_NONEXTHOP) |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 490 | |
Denis Vlasenko | 98ee06d | 2006-12-31 18:57:37 +0000 | [diff] [blame] | 491 | static void set_flags(char *flagstr, int flags) |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 492 | { |
| 493 | int i; |
| 494 | |
Denis Vlasenko | 98ee06d | 2006-12-31 18:57:37 +0000 | [diff] [blame] | 495 | for (i = 0; (*flagstr = flagchars[i]) != 0; i++) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 496 | if (flags & flagvals[i]) { |
| 497 | ++flagstr; |
| 498 | } |
| 499 | } |
| 500 | } |
| 501 | |
Eric Andersen | 14f5c8d | 2005-04-16 19:39:00 +0000 | [diff] [blame] | 502 | /* also used in netstat */ |
Denis Vlasenko | defc1ea | 2008-06-27 02:52:20 +0000 | [diff] [blame] | 503 | void FAST_FUNC bb_displayroutes(int noresolve, int netstatfmt) |
Eric Andersen | 68be2ab | 2001-02-14 19:26:39 +0000 | [diff] [blame] | 504 | { |
Denis Vlasenko | 6d9ea24 | 2007-06-19 11:12:46 +0000 | [diff] [blame] | 505 | char devname[64], flags[16], *sdest, *sgw; |
Denis Vlasenko | 8746885 | 2007-04-13 23:22:00 +0000 | [diff] [blame] | 506 | unsigned long d, g, m; |
Denys Vlasenko | a75dcd4 | 2015-02-03 19:42:28 +0100 | [diff] [blame] | 507 | int r; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 508 | int flgs, ref, use, metric, mtu, win, ir; |
| 509 | struct sockaddr_in s_addr; |
| 510 | struct in_addr mask; |
Eric Andersen | 68be2ab | 2001-02-14 19:26:39 +0000 | [diff] [blame] | 511 | |
Denis Vlasenko | 5415c85 | 2008-07-21 23:05:26 +0000 | [diff] [blame] | 512 | FILE *fp = xfopen_for_read("/proc/net/route"); |
Eric Andersen | 68be2ab | 2001-02-14 19:26:39 +0000 | [diff] [blame] | 513 | |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 514 | printf("Kernel IP routing table\n" |
Denys Vlasenko | 6967578 | 2013-01-14 01:34:48 +0100 | [diff] [blame] | 515 | "Destination Gateway Genmask Flags %s Iface\n", |
Denis Vlasenko | 98ee06d | 2006-12-31 18:57:37 +0000 | [diff] [blame] | 516 | netstatfmt ? " MSS Window irtt" : "Metric Ref Use"); |
Eric Andersen | cd8c436 | 2001-11-10 11:22:46 +0000 | [diff] [blame] | 517 | |
Denys Vlasenko | a75dcd4 | 2015-02-03 19:42:28 +0100 | [diff] [blame] | 518 | /* Skip the first line. */ |
| 519 | r = fscanf(fp, "%*[^\n]\n"); |
| 520 | if (r < 0) { |
| 521 | /* Empty line, read error, or EOF. Yes, if routing table |
| 522 | * is completely empty, /proc/net/route has no header. |
| 523 | */ |
| 524 | goto ERROR; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 525 | } |
| 526 | while (1) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 527 | r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n", |
Denys Vlasenko | 60cb48c | 2013-01-14 15:57:44 +0100 | [diff] [blame] | 528 | devname, &d, &g, &flgs, &ref, &use, &metric, &m, |
| 529 | &mtu, &win, &ir); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 530 | if (r != 11) { |
Denys Vlasenko | a75dcd4 | 2015-02-03 19:42:28 +0100 | [diff] [blame] | 531 | ERROR: |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 532 | if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */ |
| 533 | break; |
Eric Andersen | 68be2ab | 2001-02-14 19:26:39 +0000 | [diff] [blame] | 534 | } |
Denys Vlasenko | a75dcd4 | 2015-02-03 19:42:28 +0100 | [diff] [blame] | 535 | bb_perror_msg_and_die(bb_msg_read_error); |
Glenn L McGrath | 7c58e9b | 2002-08-22 18:24:43 +0000 | [diff] [blame] | 536 | } |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 537 | |
| 538 | if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */ |
| 539 | continue; |
| 540 | } |
| 541 | |
| 542 | set_flags(flags, (flgs & IPV4_MASK)); |
| 543 | #ifdef RTF_REJECT |
| 544 | if (flgs & RTF_REJECT) { |
| 545 | flags[0] = '!'; |
| 546 | } |
| 547 | #endif |
| 548 | |
| 549 | memset(&s_addr, 0, sizeof(struct sockaddr_in)); |
| 550 | s_addr.sin_family = AF_INET; |
| 551 | s_addr.sin_addr.s_addr = d; |
Denis Vlasenko | 6d9ea24 | 2007-06-19 11:12:46 +0000 | [diff] [blame] | 552 | sdest = INET_rresolve(&s_addr, (noresolve | 0x8000), m); /* 'default' instead of '*' */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 553 | s_addr.sin_addr.s_addr = g; |
Denis Vlasenko | 6d9ea24 | 2007-06-19 11:12:46 +0000 | [diff] [blame] | 554 | sgw = INET_rresolve(&s_addr, (noresolve | 0x4000), m); /* Host instead of net */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 555 | mask.s_addr = m; |
Denis Vlasenko | 6d9ea24 | 2007-06-19 11:12:46 +0000 | [diff] [blame] | 556 | /* "%15.15s" truncates hostnames, do we really want that? */ |
| 557 | printf("%-15.15s %-15.15s %-16s%-6s", sdest, sgw, inet_ntoa(mask), flags); |
| 558 | free(sdest); |
| 559 | free(sgw); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 560 | if (netstatfmt) { |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 561 | printf("%5d %-5d %6d %s\n", mtu, win, ir, devname); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 562 | } else { |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 563 | printf("%-6d %-2d %7d %s\n", metric, ref, use, devname); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 564 | } |
Glenn L McGrath | 7c58e9b | 2002-08-22 18:24:43 +0000 | [diff] [blame] | 565 | } |
Alexey Fomenko | 708dd4c | 2011-03-02 04:01:24 +0100 | [diff] [blame] | 566 | fclose(fp); |
Eric Andersen | 68be2ab | 2001-02-14 19:26:39 +0000 | [diff] [blame] | 567 | } |
| 568 | |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 569 | #if ENABLE_FEATURE_IPV6 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 570 | |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 571 | static void INET6_displayroutes(void) |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 572 | { |
Denis Vlasenko | 6d9ea24 | 2007-06-19 11:12:46 +0000 | [diff] [blame] | 573 | char addr6[128], *naddr6; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 574 | /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses. |
| 575 | * We read the non-delimited strings into the tail of the buffer |
| 576 | * using fscanf and then modify the buffer by shifting forward |
| 577 | * while inserting ':'s and the nul terminator for the first string. |
| 578 | * Hence the strings are at addr6x and addr6x+40. This generates |
| 579 | * _much_ less code than the previous (upstream) approach. */ |
| 580 | char addr6x[80]; |
| 581 | char iface[16], flags[16]; |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 582 | int iflags, metric, refcnt, use, prefix_len, slen; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 583 | struct sockaddr_in6 snaddr6; |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 584 | |
Denis Vlasenko | 5415c85 | 2008-07-21 23:05:26 +0000 | [diff] [blame] | 585 | FILE *fp = xfopen_for_read("/proc/net/ipv6_route"); |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 586 | |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 587 | printf("Kernel IPv6 routing table\n%-44s%-40s" |
Denys Vlasenko | 6967578 | 2013-01-14 01:34:48 +0100 | [diff] [blame] | 588 | "Flags Metric Ref Use Iface\n", |
| 589 | "Destination", "Next Hop"); |
Glenn L McGrath | 7c58e9b | 2002-08-22 18:24:43 +0000 | [diff] [blame] | 590 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 591 | while (1) { |
| 592 | int r; |
| 593 | r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n", |
Denis Vlasenko | a46dd89 | 2008-07-12 09:20:44 +0000 | [diff] [blame] | 594 | addr6x+14, &prefix_len, &slen, addr6x+40+7, |
Denys Vlasenko | 09020b1 | 2015-02-03 19:32:44 +0100 | [diff] [blame] | 595 | &metric, &refcnt, &use, &iflags, iface); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 596 | if (r != 9) { |
| 597 | if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */ |
| 598 | break; |
| 599 | } |
Denis Vlasenko | 98ee06d | 2006-12-31 18:57:37 +0000 | [diff] [blame] | 600 | ERROR: |
Denys Vlasenko | a75dcd4 | 2015-02-03 19:42:28 +0100 | [diff] [blame] | 601 | bb_perror_msg_and_die(bb_msg_read_error); |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 602 | } |
| 603 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 604 | /* Do the addr6x shift-and-insert changes to ':'-delimit addresses. |
| 605 | * For now, always do this to validate the proc route format, even |
| 606 | * if the interface is down. */ |
| 607 | { |
| 608 | int i = 0; |
| 609 | char *p = addr6x+14; |
| 610 | |
| 611 | do { |
| 612 | if (!*p) { |
Denis Vlasenko | 6d9ea24 | 2007-06-19 11:12:46 +0000 | [diff] [blame] | 613 | if (i == 40) { /* nul terminator for 1st address? */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 614 | addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */ |
| 615 | ++p; /* Skip and continue. */ |
| 616 | continue; |
| 617 | } |
| 618 | goto ERROR; |
| 619 | } |
| 620 | addr6x[i++] = *p++; |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 621 | if (!((i+1) % 5)) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 622 | addr6x[i++] = ':'; |
| 623 | } |
| 624 | } while (i < 40+28+7); |
| 625 | } |
| 626 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 627 | set_flags(flags, (iflags & IPV6_MASK)); |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 628 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 629 | r = 0; |
Denys Vlasenko | 940c720 | 2011-03-02 04:07:14 +0100 | [diff] [blame] | 630 | while (1) { |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 631 | inet_pton(AF_INET6, addr6x + r, |
| 632 | (struct sockaddr *) &snaddr6.sin6_addr); |
| 633 | snaddr6.sin6_family = AF_INET6; |
Denis Vlasenko | 6d9ea24 | 2007-06-19 11:12:46 +0000 | [diff] [blame] | 634 | naddr6 = INET6_rresolve((struct sockaddr_in6 *) &snaddr6, |
Denys Vlasenko | 6967578 | 2013-01-14 01:34:48 +0100 | [diff] [blame] | 635 | 0x0fff /* Apparently, upstream never resolves. */ |
| 636 | ); |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 637 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 638 | if (!r) { /* 1st pass */ |
| 639 | snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len); |
| 640 | r += 40; |
Denis Vlasenko | 6d9ea24 | 2007-06-19 11:12:46 +0000 | [diff] [blame] | 641 | free(naddr6); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 642 | } else { /* 2nd pass */ |
| 643 | /* Print the info. */ |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 644 | printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n", |
Denis Vlasenko | 6d9ea24 | 2007-06-19 11:12:46 +0000 | [diff] [blame] | 645 | addr6, naddr6, flags, metric, refcnt, use, iface); |
| 646 | free(naddr6); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 647 | break; |
| 648 | } |
Denys Vlasenko | 940c720 | 2011-03-02 04:07:14 +0100 | [diff] [blame] | 649 | } |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 650 | } |
Alexey Fomenko | 708dd4c | 2011-03-02 04:01:24 +0100 | [diff] [blame] | 651 | fclose(fp); |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 652 | } |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 653 | |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 654 | #endif |
| 655 | |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 656 | #define ROUTE_OPT_A 0x01 |
| 657 | #define ROUTE_OPT_n 0x02 |
| 658 | #define ROUTE_OPT_e 0x04 |
| 659 | #define ROUTE_OPT_INET6 0x08 /* Not an actual option. See below. */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 660 | |
| 661 | /* 1st byte is offset to next entry offset. 2nd byte is return value. */ |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 662 | /* 2nd byte matches RTACTION_* code */ |
| 663 | static const char tbl_verb[] ALIGN1 = |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 664 | "\006\001add\0" |
| 665 | "\006\002del\0" |
Tim Riker | c1ef7bd | 2006-01-25 00:08:53 +0000 | [diff] [blame] | 666 | /* "\011\002delete\0" */ |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 667 | "\010\002delete" /* Since it's last, we can save a byte. */ |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 668 | ; |
| 669 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 670 | int route_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 671 | int route_main(int argc UNUSED_PARAM, char **argv) |
Eric Andersen | ec45595 | 2001-02-14 08:11:27 +0000 | [diff] [blame] | 672 | { |
Denis Vlasenko | 67b23e6 | 2006-10-03 21:00:06 +0000 | [diff] [blame] | 673 | unsigned opt; |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 674 | int what; |
| 675 | char *family; |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 676 | char **p; |
Glenn L McGrath | 7c58e9b | 2002-08-22 18:24:43 +0000 | [diff] [blame] | 677 | |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 678 | /* First, remap '-net' and '-host' to avoid getopt problems. */ |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 679 | p = argv; |
| 680 | while (*++p) { |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 681 | if (strcmp(*p, "-net") == 0 || strcmp(*p, "-host") == 0) { |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 682 | p[0][0] = '#'; |
Robert Griebl | 820098f | 2002-05-14 23:03:23 +0000 | [diff] [blame] | 683 | } |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 684 | } |
Glenn L McGrath | 7c58e9b | 2002-08-22 18:24:43 +0000 | [diff] [blame] | 685 | |
Denis Vlasenko | fe7cd64 | 2007-08-18 15:32:12 +0000 | [diff] [blame] | 686 | opt = getopt32(argv, "A:ne", &family); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 687 | |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 688 | if ((opt & ROUTE_OPT_A) && strcmp(family, "inet") != 0) { |
| 689 | #if ENABLE_FEATURE_IPV6 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 690 | if (strcmp(family, "inet6") == 0) { |
| 691 | opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */ |
| 692 | } else |
| 693 | #endif |
| 694 | bb_show_usage(); |
| 695 | } |
| 696 | |
| 697 | argv += optind; |
| 698 | |
| 699 | /* No more args means display the routing table. */ |
| 700 | if (!*argv) { |
| 701 | int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0; |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 702 | #if ENABLE_FEATURE_IPV6 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 703 | if (opt & ROUTE_OPT_INET6) |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 704 | INET6_displayroutes(); |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 705 | else |
| 706 | #endif |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 707 | bb_displayroutes(noresolve, opt & ROUTE_OPT_e); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 708 | |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 709 | fflush_stdout_and_exit(EXIT_SUCCESS); |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 710 | } |
| 711 | |
| 712 | /* Check verb. At the moment, must be add, del, or delete. */ |
| 713 | what = kw_lookup(tbl_verb, &argv); |
| 714 | if (!what || !*argv) { /* Unknown verb or no more args. */ |
| 715 | bb_show_usage(); |
Eric Andersen | ec45595 | 2001-02-14 08:11:27 +0000 | [diff] [blame] | 716 | } |
| 717 | |
Denis Vlasenko | 703e202 | 2007-01-22 14:12:08 +0000 | [diff] [blame] | 718 | #if ENABLE_FEATURE_IPV6 |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 719 | if (opt & ROUTE_OPT_INET6) |
| 720 | INET6_setroute(what, argv); |
| 721 | else |
Eric Andersen | 51b8bd6 | 2002-07-03 11:46:38 +0000 | [diff] [blame] | 722 | #endif |
Manuel Novoa III | 7d0c519 | 2004-03-10 07:42:38 +0000 | [diff] [blame] | 723 | INET_setroute(what, argv); |
| 724 | |
| 725 | return EXIT_SUCCESS; |
Eric Andersen | ec45595 | 2001-02-14 08:11:27 +0000 | [diff] [blame] | 726 | } |