/* * Update the MTU on all routes for the given interface */ void route_UpdateMTU(struct bundle *bundle) { struct rt_msghdr *rtm; struct sockaddr *sa[RTAX_MAX]; struct ncprange dst; size_t needed; char *sp, *cp, *ep; int mib[6]; log_Printf(LogDEBUG, "route_UpdateMTU (%d)\n", bundle->iface->index); mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; mib[3] = 0; mib[4] = NET_RT_DUMP; mib[5] = 0; if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n", strerror(errno)); return; } sp = malloc(needed); if (sp == NULL) return; if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) { log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n", strerror(errno)); free(sp); return; } ep = sp + needed; for (cp = sp; cp < ep; cp += rtm->rtm_msglen) { rtm = (struct rt_msghdr *)cp; route_ParseHdr(rtm, sa); if (sa[RTAX_DST] && (sa[RTAX_DST]->sa_family == AF_INET #ifndef NOINET6 || sa[RTAX_DST]->sa_family == AF_INET6 #endif ) && sa[RTAX_GATEWAY] && rtm->rtm_index == bundle->iface->index) { if (log_IsKept(LogTCPIP)) { ncprange_setsa(&dst, sa[RTAX_DST], sa[RTAX_NETMASK]); log_Printf(LogTCPIP, "route_UpdateMTU: Netif: %d (%s), dst %s," " mtu %lu\n", rtm->rtm_index, Index2Nam(rtm->rtm_index), ncprange_ntoa(&dst), bundle->iface->mtu); } rt_Update(bundle, sa[RTAX_DST], sa[RTAX_GATEWAY], sa[RTAX_NETMASK], sa[RTAX_IFP], sa[RTAX_IFA]); } } free(sp); }
int route_Show(struct cmdargs const *arg) { struct rt_msghdr *rtm; struct sockaddr *sa[RTAX_MAX]; char *sp, *ep, *cp; size_t needed; int mib[6]; mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; mib[3] = 0; mib[4] = NET_RT_DUMP; mib[5] = 0; if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { log_Printf(LogERROR, "route_Show: sysctl: estimate: %s\n", strerror(errno)); return (1); } sp = malloc(needed); if (sp == NULL) return (1); if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) { log_Printf(LogERROR, "route_Show: sysctl: getroute: %s\n", strerror(errno)); free(sp); return (1); } ep = sp + needed; prompt_Printf(arg->prompt, "%-20s%-20sFlags Netif\n", "Destination", "Gateway"); for (cp = sp; cp < ep; cp += rtm->rtm_msglen) { rtm = (struct rt_msghdr *)cp; route_ParseHdr(rtm, sa); if (sa[RTAX_DST] && sa[RTAX_GATEWAY]) { p_sockaddr(arg->prompt, sa[RTAX_DST], sa[RTAX_NETMASK], 20); p_sockaddr(arg->prompt, sa[RTAX_GATEWAY], NULL, 20); p_flags(arg->prompt, rtm->rtm_flags, 6); prompt_Printf(arg->prompt, " %s\n", Index2Nam(rtm->rtm_index)); } else prompt_Printf(arg->prompt, "<can't parse routing entry>\n"); } free(sp); return 0; }
/* * Delete routes associated with our interface */ void route_IfDelete(struct bundle *bundle, int all) { struct rt_msghdr *rtm; struct sockaddr *sa[RTAX_MAX]; struct ncprange range; int pass; size_t needed; char *sp, *cp, *ep; int mib[6]; log_Printf(LogDEBUG, "route_IfDelete (%d)\n", bundle->iface->index); mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; mib[3] = 0; mib[4] = NET_RT_DUMP; mib[5] = 0; if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n", strerror(errno)); return; } sp = malloc(needed); if (sp == NULL) return; if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) { log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n", strerror(errno)); free(sp); return; } ep = sp + needed; for (pass = 0; pass < 2; pass++) { /* * We do 2 passes. The first deletes all cloned routes. The second * deletes all non-cloned routes. This is done to avoid * potential errors from trying to delete route X after route Y where * route X was cloned from route Y (and is no longer there 'cos it * may have gone with route Y). */ if (RTF_WASCLONED == 0 && pass == 0) /* So we can't tell ! */ continue; for (cp = sp; cp < ep; cp += rtm->rtm_msglen) { rtm = (struct rt_msghdr *)cp; route_ParseHdr(rtm, sa); if (rtm->rtm_index == bundle->iface->index && sa[RTAX_DST] && sa[RTAX_GATEWAY] && (sa[RTAX_DST]->sa_family == AF_INET #ifndef NOINET6 || sa[RTAX_DST]->sa_family == AF_INET6 #endif ) && (all || (rtm->rtm_flags & RTF_GATEWAY))) { if (log_IsKept(LogDEBUG)) { char gwstr[41]; struct ncpaddr gw; ncprange_setsa(&range, sa[RTAX_DST], sa[RTAX_NETMASK]); ncpaddr_setsa(&gw, sa[RTAX_GATEWAY]); snprintf(gwstr, sizeof gwstr, "%s", ncpaddr_ntoa(&gw)); log_Printf(LogDEBUG, "Found %s %s\n", ncprange_ntoa(&range), gwstr); } if (sa[RTAX_GATEWAY]->sa_family == AF_INET || #ifndef NOINET6 sa[RTAX_GATEWAY]->sa_family == AF_INET6 || #endif sa[RTAX_GATEWAY]->sa_family == AF_LINK) { if ((pass == 0 && (rtm->rtm_flags & RTF_WASCLONED)) || (pass == 1 && !(rtm->rtm_flags & RTF_WASCLONED))) { ncprange_setsa(&range, sa[RTAX_DST], sa[RTAX_NETMASK]); rt_Set(bundle, RTM_DELETE, &range, NULL, 0, 0); } else log_Printf(LogDEBUG, "route_IfDelete: Skip it (pass %d)\n", pass); } else log_Printf(LogDEBUG, "route_IfDelete: Can't remove routes for family %d\n", sa[RTAX_GATEWAY]->sa_family); } } } free(sp); }