static int
route_del(struct rtentry *rt)
{
if (rt->rt_dev) {
route_ctrl(SIOCDELRT, rt);
free(rt->rt_dev), rt->rt_dev = NULL;
}
return 0;
}
static int
route_del(struct rtentry *rt)
{
if (rt->rt_dev) {
route_ctrl(SIOCDELRT, rt);
free(rt->rt_dev), rt->rt_dev = NULL;
}
memset(rt, 0, sizeof(*rt));
return 0;
}
static int
route_add(const struct in_addr inetaddr, struct rtentry *rt)
{
char buf[256], dev[64], rdev[64];
u_int32_t dest, mask, gateway, flags, bestmask = 0;
int metric;
FILE *f = fopen("/proc/net/route", "r");
if (f == NULL) {
route_msg("%s: /proc/net/route: %s", strerror(errno), __FUNCTION__);
return -1;
}
rt->rt_gateway.sa_family = 0;
while (fgets(buf, sizeof(buf), f))
{
if (sscanf(buf, "%63s %x %x %x %*s %*s %d %x", dev, &dest,
&gateway, &flags, &metric, &mask) != 6)
continue;
if ((flags & RTF_UP) == (RTF_UP) && (inetaddr.s_addr & mask) == dest &&
(dest || strncmp(dev, "ppp", 3)) /* avoid default via pppX to avoid on-demand loops*/)
{
if ((mask | bestmask) == bestmask && rt->rt_gateway.sa_family)
continue;
bestmask = mask;
sin_addr(&rt->rt_gateway).s_addr = gateway;
rt->rt_gateway.sa_family = AF_INET;
rt->rt_flags = flags;
rt->rt_metric = metric;
strncpy(rdev, dev, sizeof(rdev));
if (mask == INADDR_BROADCAST)
break;
}
}
fclose(f);
/* check for no route */
if (rt->rt_gateway.sa_family != AF_INET)
{
/* route_msg("%s: no route to host", __FUNCTION__); */
return -1;
}
/* check for existing route to this host,
* add if missing based on the existing routes */
if (rt->rt_flags & RTF_HOST)
{
/* route_msg("%s: not adding existing route", __FUNCTION__); */
return -1;
}
sin_addr(&rt->rt_dst) = inetaddr;
rt->rt_dst.sa_family = AF_INET;
sin_addr(&rt->rt_genmask).s_addr = INADDR_BROADCAST;
rt->rt_genmask.sa_family = AF_INET;
rt->rt_flags &= RTF_GATEWAY;
rt->rt_flags |= RTF_UP | RTF_HOST;
rt->rt_metric++;
rt->rt_dev = strdup(rdev);
if (!rt->rt_dev)
{
/* route_msg("%s: no memory", __FUNCTION__); */
return -1;
}
if (!route_ctrl(SIOCADDRT, rt))
return 0;
free(rt->rt_dev), rt->rt_dev = NULL;
return -1;
}
/* static */ int
route_add(const struct in_addr inetaddr, int any_dgw, struct rtentry *rt)
{
char buf[256], dev[64], rdev[64];
u_int32_t dest, mask, gateway, flags, bestmask = 0;
u_int32_t metric, metric_min = UINT_MAX;
FILE *fp = fopen("/proc/net/route", "r");
if (!fp) {
/* route_msg("%s: /proc/net/route: %s", strerror(errno), __FUNCTION__); */
return -1;
}
rt->rt_gateway.sa_family = 0;
while (fgets(buf, sizeof(buf), fp)) {
if (sscanf(buf, "%63s %x %x %x %*s %*s %d %x",
dev, &dest, &gateway, &flags, &metric, &mask) != 6)
continue;
if ((flags & RTF_UP) != RTF_UP)
continue;
if (!any_dgw) {
/* use only physical WAN/MAN interface */
if (strncmp(dev, "eth", 3) != 0 &&
strncmp(dev, "apcli", 5) != 0 &&
strncmp(dev, "wwan", 4) != 0 &&
strncmp(dev, "weth", 4) != 0)
continue;
if ( (inetaddr.s_addr & mask) == dest && gateway ) {
if ((mask | bestmask) == bestmask && rt->rt_gateway.sa_family)
continue;
bestmask = mask;
sin_addr(&rt->rt_gateway).s_addr = gateway;
rt->rt_gateway.sa_family = AF_INET;
rt->rt_flags = flags;
rt->rt_metric = (dest) ? metric : 0;
strncpy(rdev, dev, sizeof(rdev));
if (mask == INADDR_BROADCAST)
break;
}
} else {
/* skip lo and LAN */
if (strcmp(dev, "lo") == 0 ||
strcmp(dev, "br0") == 0)
continue;
if ( !dest && !mask && gateway && metric < metric_min ) {
metric_min = metric;
sin_addr(&rt->rt_gateway).s_addr = gateway;
rt->rt_gateway.sa_family = AF_INET;
rt->rt_flags = flags;
rt->rt_metric = 0;
strncpy(rdev, dev, sizeof(rdev));
}
}
}
fclose(fp);
/* check for no route */
if (rt->rt_gateway.sa_family != AF_INET)
{
/* route_msg("%s: no route to host", __FUNCTION__); */
return -1;
}
/* check for existing route to this host,
* add if missing based on the existing routes */
if (rt->rt_flags & RTF_HOST)
{
/* route_msg("%s: not adding existing route", __FUNCTION__); */
return -1;
}
sin_addr(&rt->rt_dst) = inetaddr;
rt->rt_dst.sa_family = AF_INET;
sin_addr(&rt->rt_genmask).s_addr = INADDR_BROADCAST;
rt->rt_genmask.sa_family = AF_INET;
rt->rt_flags &= RTF_GATEWAY;
rt->rt_flags |= RTF_UP | RTF_HOST;
rt->rt_metric++;
rt->rt_dev = strdup(rdev);
if (!rt->rt_dev)
{
/* route_msg("%s: no memory", __FUNCTION__); */
return -1;
}
if (!route_ctrl(SIOCADDRT, rt))
return 0;
free(rt->rt_dev);
memset(rt, 0, sizeof(*rt));
return -1;
}
int
route_add(const struct in_addr inetaddr, struct rtentry *rt)
{
char buf[256], dev[64];
int metric, flags;
u_int32_t dest, mask;
FILE *f = fopen("/proc/net/route", "r");
if (f == NULL) {
l2tp_log (LOG_ERR, "/proc/net/route: %s", strerror(errno));
return -1;
}
while (fgets(buf, sizeof(buf), f)) {
if (sscanf(buf, "%63s %x %x %X %*s %*s %d %x", dev, &dest,
&sin_addr(&rt->rt_gateway).s_addr, &flags, &metric, &mask) != 6)
continue;
if ((flags & RTF_UP) == (RTF_UP) && (inetaddr.s_addr & mask) == dest &&
(dest || strncmp(dev, "ppp", 3)) /* avoid default via pppX to avoid on-demand loops*/) {
rt->rt_metric = metric + 1;
rt->rt_gateway.sa_family = AF_INET;
break;
}
}
fclose(f);
/* check for no route */
if (rt->rt_gateway.sa_family != AF_INET) {
/* l2tp_log (LOG_ERR, "route_add: no route to host"); */
return -1;
}
/* check for existing route to this host,
add if missing based on the existing routes */
if (flags & RTF_HOST) {
/* l2tp_log (LOG_ERR, "route_add: not adding existing route"); */
return -1;
}
sin_addr(&rt->rt_dst) = inetaddr;
rt->rt_dst.sa_family = AF_INET;
sin_addr(&rt->rt_genmask).s_addr = INADDR_BROADCAST;
rt->rt_genmask.sa_family = AF_INET;
rt->rt_flags = RTF_UP | RTF_HOST;
if (flags & RTF_GATEWAY)
rt->rt_flags |= RTF_GATEWAY;
rt->rt_metric++;
rt->rt_dev = strdup(dev);
if (!rt->rt_dev) {
l2tp_log (LOG_ERR, "route_add: no memory");
return -1;
}
if (!route_ctrl(SIOCADDRT, rt))
return 0;
free(rt->rt_dev);
rt->rt_dev = NULL;
return -1;
}
