/*
* 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);
}
void
rt_Update(struct bundle *bundle, const struct sockaddr *dst,
const struct sockaddr *gw, const struct sockaddr *mask)
{
struct ncprange ncpdst;
struct rtmsg rtmes;
char *p;
int s, wb;
s = ID0socket(PF_ROUTE, SOCK_RAW, 0);
if (s < 0) {
log_Printf(LogERROR, "rt_Update: socket(): %s\n", strerror(errno));
return;
}
memset(&rtmes, '\0', sizeof rtmes);
rtmes.m_rtm.rtm_version = RTM_VERSION;
rtmes.m_rtm.rtm_type = RTM_CHANGE;
rtmes.m_rtm.rtm_addrs = 0;
rtmes.m_rtm.rtm_seq = ++bundle->routing_seq;
rtmes.m_rtm.rtm_pid = getpid();
rtmes.m_rtm.rtm_flags = RTF_UP | RTF_STATIC;
if (bundle->ncp.cfg.sendpipe > 0) {
rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe;
rtmes.m_rtm.rtm_inits |= RTV_SPIPE;
}
if (bundle->ncp.cfg.recvpipe > 0) {
rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe;
rtmes.m_rtm.rtm_inits |= RTV_RPIPE;
}
rtmes.m_rtm.rtm_rmx.rmx_mtu = bundle->iface->mtu;
rtmes.m_rtm.rtm_inits |= RTV_MTU;
p = rtmes.m_space;
if (dst) {
rtmes.m_rtm.rtm_addrs |= RTA_DST;
p += memcpy_roundup(p, dst, dst->sa_len);
}
rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
p += memcpy_roundup(p, gw, gw->sa_len);
if (mask) {
rtmes.m_rtm.rtm_addrs |= RTA_NETMASK;
p += memcpy_roundup(p, mask, mask->sa_len);
}
rtmes.m_rtm.rtm_msglen = p - (char *)&rtmes;
wb = ID0write(s, &rtmes, rtmes.m_rtm.rtm_msglen);
if (wb < 0) {
ncprange_setsa(&ncpdst, dst, mask);
log_Printf(LogTCPIP, "rt_Update failure:\n");
log_Printf(LogTCPIP, "rt_Update: Dst = %s\n", ncprange_ntoa(&ncpdst));
if (rtmes.m_rtm.rtm_errno == 0)
log_Printf(LogWARN, "%s: Change route failed: errno: %s\n",
ncprange_ntoa(&ncpdst), strerror(errno));
else
log_Printf(LogWARN, "%s: Change route failed: %s\n",
ncprange_ntoa(&ncpdst), strerror(rtmes.m_rtm.rtm_errno));
}
close(s);
}
static void
p_sockaddr(struct prompt *prompt, struct sockaddr *phost,
struct sockaddr *pmask, int width)
{
struct ncprange range;
char buf[29];
struct sockaddr_dl *dl = (struct sockaddr_dl *)phost;
if (log_IsKept(LogDEBUG)) {
char tmp[50];
log_Printf(LogDEBUG, "Found the following sockaddr:\n");
log_Printf(LogDEBUG, " Family %d, len %d\n",
(int)phost->sa_family, (int)phost->sa_len);
inet_ntop(phost->sa_family, phost->sa_data, tmp, sizeof tmp);
log_Printf(LogDEBUG, " Addr %s\n", tmp);
if (pmask) {
inet_ntop(pmask->sa_family, pmask->sa_data, tmp, sizeof tmp);
log_Printf(LogDEBUG, " Mask %s\n", tmp);
}
}
switch (phost->sa_family) {
case AF_INET:
#ifndef NOINET6
case AF_INET6:
#endif
ncprange_setsa(&range, phost, pmask);
if (ncprange_isdefault(&range))
prompt_Printf(prompt, "%-*s ", width - 1, "default");
else
prompt_Printf(prompt, "%-*s ", width - 1, ncprange_ntoa(&range));
return;
case AF_LINK:
if (dl->sdl_nlen)
snprintf(buf, sizeof buf, "%.*s", dl->sdl_nlen, dl->sdl_data);
else if (dl->sdl_alen) {
if (dl->sdl_type == IFT_ETHER) {
if (dl->sdl_alen < sizeof buf / 3) {
int f;
u_char *MAC;
MAC = (u_char *)dl->sdl_data + dl->sdl_nlen;
for (f = 0; f < dl->sdl_alen; f++)
sprintf(buf+f*3, "%02x:", MAC[f]);
buf[f*3-1] = '\0';
} else
strcpy(buf, "??:??:??:??:??:??");
} else
sprintf(buf, "<IFT type %d>", dl->sdl_type);
} else if (dl->sdl_slen)
sprintf(buf, "<slen %d?>", dl->sdl_slen);
else
sprintf(buf, "link#%d", dl->sdl_index);
break;
default:
sprintf(buf, "<AF type %d>", phost->sa_family);
break;
}
prompt_Printf(prompt, "%-*s ", width-1, buf);
}
/*
* 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);
}
struct iface *
iface_Create(const char *name)
{
int mib[6], maxtries, err;
size_t needed, namelen;
char *buf, *ptr, *end;
struct if_msghdr *ifm;
struct ifa_msghdr *ifam;
struct sockaddr_dl *dl;
struct sockaddr *sa[RTAX_MAX];
struct iface *iface;
struct iface_addr *addr;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = 0;
mib[4] = NET_RT_IFLIST;
mib[5] = 0;
maxtries = 20;
err = 0;
do {
if (maxtries-- == 0 || (err && err != ENOMEM)) {
fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
return NULL;
}
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
strerror(errno));
return NULL;
}
if ((buf = (char *)malloc(needed)) == NULL) {
fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
return NULL;
}
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
err = errno;
free(buf);
buf = NULL;
}
} while (buf == NULL);
ptr = buf;
end = buf + needed;
iface = NULL;
namelen = strlen(name);
while (ptr < end && iface == NULL) {
ifm = (struct if_msghdr *)ptr; /* On if_msghdr */
if (ifm->ifm_type != RTM_IFINFO)
break;
dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */
if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
iface = (struct iface *)malloc(sizeof *iface);
if (iface == NULL) {
fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
return NULL;
}
iface->name = strdup(name);
iface->descr = NULL;
iface->index = ifm->ifm_index;
iface->flags = ifm->ifm_flags;
iface->mtu = 0;
iface->addrs = 0;
iface->addr = NULL;
}
ptr += ifm->ifm_msglen; /* First ifa_msghdr */
for (; ptr < end; ptr += ifam->ifam_msglen) {
ifam = (struct ifa_msghdr *)ptr; /* Next if address */
if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */
break;
if (iface != NULL && ifam->ifam_addrs & RTA_IFA) {
/* Found a configured interface ! */
iface_ParseHdr(ifam, sa);
if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET
#ifndef NOINET6
|| sa[RTAX_IFA]->sa_family == AF_INET6
#endif
)) {
/* Record the address */
addr = (struct iface_addr *)
realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
if (addr == NULL)
break;
iface->addr = addr;
addr += iface->addrs;
iface->addrs++;
ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]);
if (sa[RTAX_BRD])
ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]);
else
ncpaddr_init(&addr->peer);
}
}
}
}
free(buf);
return iface;
}
struct iface *
iface_Create(const char *name)
{
size_t namelen;
struct sockaddr_dl *dl;
struct ifaddrs *ifap, *ifa;
struct iface *iface;
struct iface_addr *addr;
if (getifaddrs(&ifap) != 0) {
fprintf(stderr, "iface_Create: getifaddrs: %s\n", strerror(errno));
return NULL;
}
iface = NULL;
namelen = strlen(name);
for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
if (strcmp(name, ifa->ifa_name))
continue;
if (ifa->ifa_addr->sa_family == AF_LINK) {
dl = (struct sockaddr_dl *)ifa->ifa_addr;
iface = (struct iface *)malloc(sizeof *iface);
if (iface == NULL) {
fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
freeifaddrs(ifap);
return NULL;
}
iface->name = strdup(name);
iface->index = if_nametoindex(name);
iface->flags = ifa->ifa_flags;
iface->mtu = 0;
iface->addrs = 0;
iface->addr = NULL;
}
if (ifa->ifa_addr->sa_family == AF_INET
#ifndef NOINET6
|| ifa->ifa_addr->sa_family == AF_INET6
#endif
) {
/* Record the address */
addr = (struct iface_addr *)
realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
if (addr == NULL)
break;
iface->addr = addr;
addr += iface->addrs;
iface->addrs++;
ncprange_setsa(&addr->ifa, ifa->ifa_addr, ifa->ifa_netmask);
if (ifa->ifa_broadaddr)
ncpaddr_setsa(&addr->peer, ifa->ifa_broadaddr);
else
ncpaddr_init(&addr->peer);
}
}
freeifaddrs(ifap);
return iface;
}
