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Factor out a function to get an interface name from an index.

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This commit is contained in:
david
2011-08-30 23:55:05 +00:00
parent b0604a2110
commit 31be04c93c
1 changed files with 22 additions and 19 deletions
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41
libnetutil/netutil.cc
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@@ -3092,6 +3092,23 @@ static int get_srcaddr(const struct sockaddr_storage *dst,
return 0;
}
static char *lookup_ifindex(unsigned int index, int af, char *namebuf, size_t len) {
intf_t *it;
struct intf_entry entry;
int rc;
it = intf_open();
assert(it != NULL);
entry.intf_len = sizeof(entry);
rc = intf_get_index(it, &entry, af, index);
intf_close(it);
if (rc == -1)
return NULL;
Strncpy(namebuf, entry.intf_name, len);
return namebuf;
}
static int route_dst_generic(const struct sockaddr_storage *dst,
struct route_nfo *rnfo, const char *device,
const struct sockaddr_storage *spoofss) {
@@ -3118,27 +3135,13 @@ static int route_dst_generic(const struct sockaddr_storage *dst,
if (device == NULL || device[0] == '\0') {
/* Check if there is an interface scope on the address which we must use. */
if (dst->ss_family == AF_INET6) {
const struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *) dst;
const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) dst;
if (sin6->sin6_scope_id > 0) {
intf_t *it;
struct intf_entry entry;
int rc;
it = intf_open();
assert(it != NULL);
entry.intf_len = sizeof(entry);
rc = intf_get_index(it, &entry, sin6->sin6_family, sin6->sin6_scope_id);
if (rc == -1) {
intf_close(it);
device = lookup_ifindex(sin6->sin6_scope_id, sin6->sin6_family, namebuf, sizeof(namebuf));
if (device == NULL) {
netutil_error("Could not find interface with index %u", (unsigned int) sin6->sin6_scope_id);
return 0;
}
intf_close(it);
Strncpy(namebuf, entry.intf_name, sizeof(namebuf));
device = namebuf;
return 0;
}
}
}
}