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Honor sin6_scope_id in route_dst_generic.

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This is set nonzero when there is a scope identifier at the end of
an IPv6 address, like fe80::a8bb:ccff:fedd:eeff%eth0. When this
happens, we look up the interface by index and then act as if it was the
interface given by -e. (But -e always has precedence over this.)
This commit is contained in:
david
2011-08-30 04:18:58 +00:00
parent d7302d7608
commit 053154e5c3
1 changed files with 13 additions and 1 deletions
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14
libnetutil/netutil.cc
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@@ -3094,6 +3094,7 @@ static int route_dst_generic(const struct sockaddr_storage *dst,
struct sys_route *routes; struct sys_route *routes;
int numroutes = 0; int numroutes = 0;
int i; int i;
char namebuf[IFNAMSIZ];
char errstr[256]; char errstr[256];
errstr[0]='\0'; errstr[0]='\0';
@@ -3107,10 +3108,21 @@ static int route_dst_generic(const struct sockaddr_storage *dst,
assert(device!=NULL && device[0]!='\0'); assert(device!=NULL && device[0]!='\0');
} }
/* Check if there is an interface scope on the address. */
if (device == NULL || device[0] == '\0') {
if (dst->ss_family == AF_INET6) {
const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) dst;
if (sin6->sin6_scope_id > 0) {
device = if_indextoname(sin6->sin6_scope_id, namebuf);
assert(device != NULL);
}
}
}
if (device!=NULL && device[0]!='\0'){ if (device!=NULL && device[0]!='\0'){
iface = getInterfaceByName(device, dst->ss_family); iface = getInterfaceByName(device, dst->ss_family);
if (!iface) if (!iface)
netutil_fatal("Could not find interface %s which was specified by -e", device); netutil_fatal("Could not find interface %s", device);
} else { } else {
iface = NULL; iface = NULL;
} }