| /* vi: set sw=4 ts=4: */ |
| /* route |
| * |
| * Similar to the standard Unix route, but with only the necessary |
| * parts for AF_INET and AF_INET6 |
| * |
| * Bjorn Wesen, Axis Communications AB |
| * |
| * Author of the original route: |
| * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> |
| * (derived from FvK's 'route.c 1.70 01/04/94') |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| * |
| * $Id: route.c,v 1.26 2004/03/19 23:27:08 mjn3 Exp $ |
| * |
| * displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru> |
| * adjustments by Larry Doolittle <LRDoolittle@lbl.gov> |
| * |
| * IPV6 support added by Bart Visscher <magick@linux-fan.com> |
| */ |
| |
| /* 2004/03/09 Manuel Novoa III <mjn3@codepoet.org> |
| * |
| * Rewritten to fix several bugs, add additional error checking, and |
| * remove ridiculous amounts of bloat. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <assert.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <getopt.h> |
| #include <sys/types.h> |
| #include <sys/ioctl.h> |
| #include <net/route.h> |
| #include <net/if.h> |
| #include "busybox.h" |
| #include "inet_common.h" |
| |
| #ifndef RTF_UP |
| /* Keep this in sync with /usr/src/linux/include/linux/route.h */ |
| #define RTF_UP 0x0001 /* route usable */ |
| #define RTF_GATEWAY 0x0002 /* destination is a gateway */ |
| #define RTF_HOST 0x0004 /* host entry (net otherwise) */ |
| #define RTF_REINSTATE 0x0008 /* reinstate route after tmout */ |
| #define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */ |
| #define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */ |
| #define RTF_MTU 0x0040 /* specific MTU for this route */ |
| #ifndef RTF_MSS |
| #define RTF_MSS RTF_MTU /* Compatibility :-( */ |
| #endif |
| #define RTF_WINDOW 0x0080 /* per route window clamping */ |
| #define RTF_IRTT 0x0100 /* Initial round trip time */ |
| #define RTF_REJECT 0x0200 /* Reject route */ |
| #endif |
| |
| #if defined (SIOCADDRTOLD) || defined (RTF_IRTT) /* route */ |
| #define HAVE_NEW_ADDRT 1 |
| #endif |
| |
| #if HAVE_NEW_ADDRT |
| #define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr) |
| #define full_mask(x) (x) |
| #else |
| #define mask_in_addr(x) ((x).rt_genmask) |
| #define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr) |
| #endif |
| |
| /* The RTACTION entries must agree with tbl_verb[] below! */ |
| #define RTACTION_ADD 1 |
| #define RTACTION_DEL 2 |
| |
| /* For the various tbl_*[] arrays, the 1st byte is the offset to |
| * the next entry and the 2nd byte is return value. */ |
| |
| #define NET_FLAG 1 |
| #define HOST_FLAG 2 |
| |
| /* We remap '-' to '#' to avoid problems with getopt. */ |
| static const char tbl_hash_net_host[] = |
| "\007\001#net\0" |
| /* "\010\002#host\0" */ |
| "\007\002#host" /* Since last, we can save a byte. */ |
| ; |
| |
| #define KW_TAKES_ARG 020 |
| #define KW_SETS_FLAG 040 |
| |
| #define KW_IPVx_METRIC 020 |
| #define KW_IPVx_NETMASK 021 |
| #define KW_IPVx_GATEWAY 022 |
| #define KW_IPVx_MSS 023 |
| #define KW_IPVx_WINDOW 024 |
| #define KW_IPVx_IRTT 025 |
| #define KW_IPVx_DEVICE 026 |
| |
| #define KW_IPVx_FLAG_ONLY 040 |
| #define KW_IPVx_REJECT 040 |
| #define KW_IPVx_MOD 041 |
| #define KW_IPVx_DYN 042 |
| #define KW_IPVx_REINSTATE 043 |
| |
| static const char tbl_ipvx[] = |
| /* 020 is the "takes an arg" bit */ |
| #if HAVE_NEW_ADDRT |
| "\011\020metric\0" |
| #endif |
| "\012\021netmask\0" |
| "\005\022gw\0" |
| "\012\022gateway\0" |
| "\006\023mss\0" |
| "\011\024window\0" |
| #ifdef RTF_IRTT |
| "\007\025irtt\0" |
| #endif |
| "\006\026dev\0" |
| "\011\026device\0" |
| /* 040 is the "sets a flag" bit - MUST match flags_ipvx[] values below. */ |
| #ifdef RTF_REJECT |
| "\011\040reject\0" |
| #endif |
| "\006\041mod\0" |
| "\006\042dyn\0" |
| /* "\014\043reinstate\0" */ |
| "\013\043reinstate" /* Since last, we can save a byte. */ |
| ; |
| |
| static const int flags_ipvx[] = { /* MUST match tbl_ipvx[] values above. */ |
| #ifdef RTF_REJECT |
| RTF_REJECT, |
| #endif |
| RTF_MODIFIED, |
| RTF_DYNAMIC, |
| RTF_REINSTATE |
| }; |
| |
| static int kw_lookup(const char *kwtbl, char ***pargs) |
| { |
| if (**pargs) { |
| do { |
| if (strcmp(kwtbl+2, **pargs) == 0) { /* Found a match. */ |
| *pargs += 1; |
| if (kwtbl[1] & KW_TAKES_ARG) { |
| if (!**pargs) { /* No more args! */ |
| bb_show_usage(); |
| } |
| *pargs += 1; /* Calling routine will use args[-1]. */ |
| } |
| return kwtbl[1]; |
| } |
| kwtbl += *kwtbl; |
| } while (*kwtbl); |
| } |
| return 0; |
| } |
| |
| /* Add or delete a route, depending on action. */ |
| |
| static void INET_setroute(int action, char **args) |
| { |
| struct rtentry rt; |
| const char *netmask = NULL; |
| int skfd, isnet, xflag; |
| |
| assert((action == RTACTION_ADD) || (action == RTACTION_DEL)); |
| |
| /* Grab the -net or -host options. Remember they were transformed. */ |
| xflag = kw_lookup(tbl_hash_net_host, &args); |
| |
| /* If we did grab -net or -host, make sure we still have an arg left. */ |
| if (*args == NULL) { |
| bb_show_usage(); |
| } |
| |
| /* Clean out the RTREQ structure. */ |
| memset((char *) &rt, 0, sizeof(struct rtentry)); |
| |
| { |
| const char *target = *args++; |
| char *prefix; |
| |
| /* recognize x.x.x.x/mask format. */ |
| prefix = strchr(target, '/'); |
| if(prefix) { |
| int prefix_len; |
| |
| prefix_len = bb_xgetularg10_bnd(prefix+1, 0, 32); |
| mask_in_addr(rt) = htonl( ~ (0xffffffffUL >> prefix_len)); |
| *prefix = '\0'; |
| #if HAVE_NEW_ADDRT |
| rt.rt_genmask.sa_family = AF_INET; |
| #endif |
| } else { |
| /* Default netmask. */ |
| netmask = bb_INET_default; |
| } |
| /* Prefer hostname lookup is -host flag (xflag==1) was given. */ |
| isnet = INET_resolve(target, (struct sockaddr_in *) &rt.rt_dst, |
| (xflag & HOST_FLAG)); |
| if (isnet < 0) { |
| bb_error_msg_and_die("resolving %s", target); |
| } |
| if(prefix) { |
| /* do not destroy prefix for process args */ |
| *prefix = '/'; |
| } |
| } |
| |
| if (xflag) { /* Reinit isnet if -net or -host was specified. */ |
| isnet = (xflag & NET_FLAG); |
| } |
| |
| /* Fill in the other fields. */ |
| rt.rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST)); |
| |
| while (*args) { |
| int k = kw_lookup(tbl_ipvx, &args); |
| const char *args_m1 = args[-1]; |
| |
| if (k & KW_IPVx_FLAG_ONLY) { |
| rt.rt_flags |= flags_ipvx[k & 3]; |
| continue; |
| } |
| |
| #if HAVE_NEW_ADDRT |
| if (k == KW_IPVx_METRIC) { |
| rt.rt_metric = bb_xgetularg10(args_m1) + 1; |
| continue; |
| } |
| #endif |
| |
| if (k == KW_IPVx_NETMASK) { |
| struct sockaddr mask; |
| |
| if (mask_in_addr(rt)) { |
| bb_show_usage(); |
| } |
| |
| netmask = args_m1; |
| isnet = INET_resolve(netmask, (struct sockaddr_in *) &mask, 0); |
| if (isnet < 0) { |
| bb_error_msg_and_die("resolving %s", netmask); |
| } |
| rt.rt_genmask = full_mask(mask); |
| continue; |
| } |
| |
| if (k == KW_IPVx_GATEWAY) { |
| if (rt.rt_flags & RTF_GATEWAY) { |
| bb_show_usage(); |
| } |
| |
| isnet = INET_resolve(args_m1, |
| (struct sockaddr_in *) &rt.rt_gateway, 1); |
| rt.rt_flags |= RTF_GATEWAY; |
| |
| if (isnet) { |
| if (isnet < 0) { |
| bb_error_msg_and_die("resolving %s", args_m1); |
| } |
| bb_error_msg_and_die("gateway %s is a NETWORK", args_m1); |
| } |
| continue; |
| } |
| |
| if (k == KW_IPVx_MSS) { /* Check valid MSS bounds. */ |
| rt.rt_flags |= RTF_MSS; |
| rt.rt_mss = bb_xgetularg10_bnd(args_m1, 64, 32768); |
| continue; |
| } |
| |
| if (k == KW_IPVx_WINDOW) { /* Check valid window bounds. */ |
| rt.rt_flags |= RTF_WINDOW; |
| rt.rt_window = bb_xgetularg10_bnd(args_m1, 128, INT_MAX); |
| continue; |
| } |
| |
| #ifdef RTF_IRTT |
| if (k == KW_IPVx_IRTT) { |
| rt.rt_flags |= RTF_IRTT; |
| rt.rt_irtt = bb_xgetularg10(args_m1); |
| rt.rt_irtt *= (sysconf(_SC_CLK_TCK) / 100); /* FIXME */ |
| #if 0 /* FIXME: do we need to check anything of this? */ |
| if (rt.rt_irtt < 1 || rt.rt_irtt > (120 * HZ)) { |
| bb_error_msg_and_die("bad irtt"); |
| } |
| #endif |
| continue; |
| } |
| #endif |
| |
| /* Device is special in that it can be the last arg specified |
| * and doesn't requre the dev/device keyword in that case. */ |
| if (!rt.rt_dev && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) { |
| /* Don't use args_m1 here since args may have changed! */ |
| rt.rt_dev = args[-1]; |
| continue; |
| } |
| |
| /* Nothing matched. */ |
| bb_show_usage(); |
| } |
| |
| #ifdef RTF_REJECT |
| if ((rt.rt_flags & RTF_REJECT) && !rt.rt_dev) { |
| rt.rt_dev = "lo"; |
| } |
| #endif |
| |
| /* sanity checks.. */ |
| if (mask_in_addr(rt)) { |
| unsigned long mask = mask_in_addr(rt); |
| |
| mask = ~ntohl(mask); |
| if ((rt.rt_flags & RTF_HOST) && mask != 0xffffffff) { |
| bb_error_msg_and_die("netmask %.8x and host route conflict", |
| (unsigned int) mask); |
| } |
| if (mask & (mask + 1)) { |
| bb_error_msg_and_die("bogus netmask %s", netmask); |
| } |
| mask = ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr; |
| if (mask & ~mask_in_addr(rt)) { |
| bb_error_msg_and_die("netmask and route address conflict"); |
| } |
| } |
| |
| /* Fill out netmask if still unset */ |
| if ((action == RTACTION_ADD) && (rt.rt_flags & RTF_HOST)) { |
| mask_in_addr(rt) = 0xffffffff; |
| } |
| |
| /* Create a socket to the INET kernel. */ |
| skfd = bb_xsocket(AF_INET, SOCK_DGRAM, 0); |
| |
| if (ioctl(skfd, ((action==RTACTION_ADD) ? SIOCADDRT : SIOCDELRT), &rt)<0) { |
| bb_perror_msg_and_die("SIOC[ADD|DEL]RT"); |
| } |
| |
| if (ENABLE_FEATURE_CLEAN_UP) close(skfd); |
| } |
| |
| #ifdef CONFIG_FEATURE_IPV6 |
| |
| static void INET6_setroute(int action, char **args) |
| { |
| struct sockaddr_in6 sa6; |
| struct in6_rtmsg rt; |
| int prefix_len, skfd; |
| const char *devname; |
| |
| assert((action == RTACTION_ADD) || (action == RTACTION_DEL)); |
| |
| { |
| /* We know args isn't NULL from the check in route_main. */ |
| const char *target = *args++; |
| |
| if (strcmp(target, bb_INET_default) == 0) { |
| prefix_len = 0; |
| memset(&sa6, 0, sizeof(sa6)); |
| } else { |
| char *cp; |
| if ((cp = strchr(target, '/'))) { /* Yes... const to non is ok. */ |
| *cp = 0; |
| prefix_len = bb_xgetularg10_bnd(cp+1, 0, 128); |
| } else { |
| prefix_len = 128; |
| } |
| if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) { |
| bb_error_msg_and_die("resolving %s", target); |
| } |
| } |
| } |
| |
| /* Clean out the RTREQ structure. */ |
| memset((char *) &rt, 0, sizeof(struct in6_rtmsg)); |
| |
| memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr)); |
| |
| /* Fill in the other fields. */ |
| rt.rtmsg_dst_len = prefix_len; |
| rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP); |
| rt.rtmsg_metric = 1; |
| |
| devname = NULL; |
| |
| while (*args) { |
| int k = kw_lookup(tbl_ipvx, &args); |
| const char *args_m1 = args[-1]; |
| |
| if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) { |
| rt.rtmsg_flags |= flags_ipvx[k & 3]; |
| continue; |
| } |
| |
| if (k == KW_IPVx_METRIC) { |
| rt.rtmsg_metric = bb_xgetularg10(args_m1); |
| continue; |
| } |
| |
| if (k == KW_IPVx_GATEWAY) { |
| if (rt.rtmsg_flags & RTF_GATEWAY) { |
| bb_show_usage(); |
| } |
| |
| if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) { |
| bb_error_msg_and_die("resolving %s", args_m1); |
| } |
| memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr, |
| sizeof(struct in6_addr)); |
| rt.rtmsg_flags |= RTF_GATEWAY; |
| continue; |
| } |
| |
| /* Device is special in that it can be the last arg specified |
| * and doesn't requre the dev/device keyword in that case. */ |
| if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) { |
| /* Don't use args_m1 here since args may have changed! */ |
| devname = args[-1]; |
| continue; |
| } |
| |
| /* Nothing matched. */ |
| bb_show_usage(); |
| } |
| |
| /* Create a socket to the INET6 kernel. */ |
| skfd = bb_xsocket(AF_INET6, SOCK_DGRAM, 0); |
| |
| rt.rtmsg_ifindex = 0; |
| |
| if (devname) { |
| struct ifreq ifr; |
| memset(&ifr, 0, sizeof(ifr)); |
| strcpy(ifr.ifr_name, devname); |
| |
| if (ioctl(skfd, SIOGIFINDEX, &ifr) < 0) { |
| bb_perror_msg_and_die("SIOGIFINDEX"); |
| } |
| rt.rtmsg_ifindex = ifr.ifr_ifindex; |
| } |
| |
| /* Tell the kernel to accept this route. */ |
| if (ioctl(skfd, ((action==RTACTION_ADD) ? SIOCADDRT : SIOCDELRT), &rt)<0) { |
| bb_perror_msg_and_die("SIOC[ADD|DEL]RT"); |
| } |
| |
| if (ENABLE_FEATURE_CLEAN_UP) close(skfd); |
| } |
| #endif |
| |
| static const unsigned int flagvals[] = { /* Must agree with flagchars[]. */ |
| RTF_GATEWAY, |
| RTF_HOST, |
| RTF_REINSTATE, |
| RTF_DYNAMIC, |
| RTF_MODIFIED, |
| #ifdef CONFIG_FEATURE_IPV6 |
| RTF_DEFAULT, |
| RTF_ADDRCONF, |
| RTF_CACHE |
| #endif |
| }; |
| |
| #define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED) |
| #define IPV6_MASK (RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE) |
| |
| static const char flagchars[] = /* Must agree with flagvals[]. */ |
| "GHRDM" |
| #ifdef CONFIG_FEATURE_IPV6 |
| "DAC" |
| #endif |
| ; |
| |
| static |
| #ifndef CONFIG_FEATURE_IPV6 |
| __inline |
| #endif |
| void set_flags(char *flagstr, int flags) |
| { |
| int i; |
| |
| *flagstr++ = 'U'; |
| |
| for (i=0 ; (*flagstr = flagchars[i]) != 0 ; i++) { |
| if (flags & flagvals[i]) { |
| ++flagstr; |
| } |
| } |
| } |
| |
| /* also used in netstat */ |
| void displayroutes(int noresolve, int netstatfmt); |
| void displayroutes(int noresolve, int netstatfmt) |
| { |
| char devname[64], flags[16], sdest[16], sgw[16]; |
| unsigned long int d, g, m; |
| int flgs, ref, use, metric, mtu, win, ir; |
| struct sockaddr_in s_addr; |
| struct in_addr mask; |
| |
| FILE *fp = bb_xfopen("/proc/net/route", "r"); |
| |
| bb_printf("Kernel IP routing table\n" |
| "Destination Gateway Genmask" |
| " Flags %s Iface\n", |
| netstatfmt ? " MSS Window irtt" : "Metric Ref Use"); |
| |
| if (fscanf(fp, "%*[^\n]\n") < 0) { /* Skip the first line. */ |
| goto ERROR; /* Empty or missing line, or read error. */ |
| } |
| while (1) { |
| int r; |
| r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n", |
| devname, &d, &g, &flgs, &ref, &use, &metric, &m, |
| &mtu, &win, &ir); |
| if (r != 11) { |
| if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */ |
| break; |
| } |
| ERROR: |
| bb_error_msg_and_die("fscanf"); |
| } |
| |
| if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */ |
| continue; |
| } |
| |
| set_flags(flags, (flgs & IPV4_MASK)); |
| #ifdef RTF_REJECT |
| if (flgs & RTF_REJECT) { |
| flags[0] = '!'; |
| } |
| #endif |
| |
| memset(&s_addr, 0, sizeof(struct sockaddr_in)); |
| s_addr.sin_family = AF_INET; |
| s_addr.sin_addr.s_addr = d; |
| INET_rresolve(sdest, sizeof(sdest), &s_addr, |
| (noresolve | 0x8000), m); /* Default instead of *. */ |
| |
| s_addr.sin_addr.s_addr = g; |
| INET_rresolve(sgw, sizeof(sgw), &s_addr, |
| (noresolve | 0x4000), m); /* Host instead of net. */ |
| |
| mask.s_addr = m; |
| bb_printf("%-16s%-16s%-16s%-6s", sdest, sgw, inet_ntoa(mask), flags); |
| if (netstatfmt) { |
| bb_printf("%5d %-5d %6d %s\n", mtu, win, ir, devname); |
| } else { |
| bb_printf("%-6d %-2d %7d %s\n", metric, ref, use, devname); |
| } |
| } |
| } |
| |
| #ifdef CONFIG_FEATURE_IPV6 |
| |
| static void INET6_displayroutes(int noresolve) |
| { |
| char addr6[128], naddr6[128]; |
| /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses. |
| * We read the non-delimited strings into the tail of the buffer |
| * using fscanf and then modify the buffer by shifting forward |
| * while inserting ':'s and the nul terminator for the first string. |
| * Hence the strings are at addr6x and addr6x+40. This generates |
| * _much_ less code than the previous (upstream) approach. */ |
| char addr6x[80]; |
| char iface[16], flags[16]; |
| int iflags, metric, refcnt, use, prefix_len, slen; |
| struct sockaddr_in6 snaddr6; |
| |
| FILE *fp = bb_xfopen("/proc/net/ipv6_route", "r"); |
| |
| bb_printf("Kernel IPv6 routing table\n%-44s%-40s" |
| "Flags Metric Ref Use Iface\n", |
| "Destination", "Next Hop"); |
| |
| while (1) { |
| int r; |
| r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n", |
| addr6x+14, &prefix_len, &slen, addr6x+40+7, |
| &metric, &use, &refcnt, &iflags, iface); |
| if (r != 9) { |
| if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */ |
| break; |
| } |
| ERROR: |
| bb_error_msg_and_die("fscanf"); |
| } |
| |
| /* Do the addr6x shift-and-insert changes to ':'-delimit addresses. |
| * For now, always do this to validate the proc route format, even |
| * if the interface is down. */ |
| { |
| int i = 0; |
| char *p = addr6x+14; |
| |
| do { |
| if (!*p) { |
| if (i==40) { /* nul terminator for 1st address? */ |
| addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */ |
| ++p; /* Skip and continue. */ |
| continue; |
| } |
| goto ERROR; |
| } |
| addr6x[i++] = *p++; |
| if (!((i+1)%5)) { |
| addr6x[i++] = ':'; |
| } |
| } while (i < 40+28+7); |
| } |
| |
| if (!(iflags & RTF_UP)) { /* Skip interfaces that are down. */ |
| continue; |
| } |
| |
| set_flags(flags, (iflags & IPV6_MASK)); |
| |
| r = 0; |
| do { |
| inet_pton(AF_INET6, addr6x + r, |
| (struct sockaddr *) &snaddr6.sin6_addr); |
| snaddr6.sin6_family = AF_INET6; |
| INET6_rresolve(naddr6, sizeof(naddr6), |
| (struct sockaddr_in6 *) &snaddr6, |
| #if 0 |
| (noresolve | 0x8000) /* Default instead of *. */ |
| #else |
| 0x0fff /* Apparently, upstream never resolves. */ |
| #endif |
| ); |
| |
| if (!r) { /* 1st pass */ |
| snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len); |
| r += 40; |
| } else { /* 2nd pass */ |
| /* Print the info. */ |
| bb_printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n", |
| addr6, naddr6, flags, metric, refcnt, use, iface); |
| break; |
| } |
| } while (1); |
| } |
| } |
| |
| #endif |
| |
| #define ROUTE_OPT_A 0x01 |
| #define ROUTE_OPT_n 0x02 |
| #define ROUTE_OPT_e 0x04 |
| #define ROUTE_OPT_INET6 0x08 /* Not an actual option. See below. */ |
| |
| /* 1st byte is offset to next entry offset. 2nd byte is return value. */ |
| static const char tbl_verb[] = /* 2nd byte matches RTACTION_* code */ |
| "\006\001add\0" |
| "\006\002del\0" |
| /* "\011\002delete\0" */ |
| "\010\002delete" /* Since last, we can save a byte. */ |
| ; |
| |
| int route_main(int argc, char **argv) |
| { |
| unsigned long opt; |
| int what; |
| char *family; |
| |
| /* First, remap '-net' and '-host' to avoid getopt problems. */ |
| { |
| char **p = argv; |
| |
| while (*++p) { |
| if ((strcmp(*p, "-net") == 0) || (strcmp(*p, "-host") == 0)) { |
| p[0][0] = '#'; |
| } |
| } |
| } |
| |
| opt = bb_getopt_ulflags(argc, argv, "A:ne", &family); |
| |
| if ((opt & ROUTE_OPT_A) && strcmp(family, "inet")) { |
| #ifdef CONFIG_FEATURE_IPV6 |
| if (strcmp(family, "inet6") == 0) { |
| opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */ |
| } else |
| #endif |
| bb_show_usage(); |
| } |
| |
| argv += optind; |
| |
| /* No more args means display the routing table. */ |
| if (!*argv) { |
| int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0; |
| #ifdef CONFIG_FEATURE_IPV6 |
| if (opt & ROUTE_OPT_INET6) |
| INET6_displayroutes(noresolve); |
| else |
| #endif |
| displayroutes(noresolve, opt & ROUTE_OPT_e); |
| |
| bb_xferror_stdout(); |
| bb_fflush_stdout_and_exit(EXIT_SUCCESS); |
| } |
| |
| /* Check verb. At the moment, must be add, del, or delete. */ |
| what = kw_lookup(tbl_verb, &argv); |
| if (!what || !*argv) { /* Unknown verb or no more args. */ |
| bb_show_usage(); |
| } |
| |
| #ifdef CONFIG_FEATURE_IPV6 |
| if (opt & ROUTE_OPT_INET6) |
| INET6_setroute(what, argv); |
| else |
| #endif |
| INET_setroute(what, argv); |
| |
| return EXIT_SUCCESS; |
| } |