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authorJo-Philipp Wich <jow@openwrt.org>2015-01-22 23:43:56 +0100
committerJo-Philipp Wich <jow@openwrt.org>2015-01-22 23:43:56 +0100
commite85698638f87403e756e78e0b9019c5fc3af415d (patch)
tree195f7b3b2a5b8a6280bb413853bc4f829d407bea /libs/luci-lib-ip
parent1d461b6e7ee664d6a356eb20861f3b957a558329 (diff)
luci-lib-ip: support filtering neighbors by mac or dest addr
Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
Diffstat (limited to 'libs/luci-lib-ip')
-rw-r--r--libs/luci-lib-ip/src/ip.c57
1 files changed, 43 insertions, 14 deletions
diff --git a/libs/luci-lib-ip/src/ip.c b/libs/luci-lib-ip/src/ip.c
index 403ffbd054..b72b6c05ca 100644
--- a/libs/luci-lib-ip/src/ip.c
+++ b/libs/luci-lib-ip/src/ip.c
@@ -69,6 +69,7 @@ struct dump_filter {
cidr_t from;
cidr_t src;
cidr_t dst;
+ struct ether_addr mac;
};
struct dump_state {
@@ -1028,27 +1029,49 @@ static int route_dump(lua_State *L)
}
+static bool diff_macaddr(struct ether_addr *mac1, struct ether_addr *mac2)
+{
+ struct ether_addr empty = { };
+
+ if (!memcmp(mac2, &empty, sizeof(empty)))
+ return false;
+
+ if (!mac1 || memcmp(mac1, mac2, sizeof(empty)))
+ return true;
+
+ return false;
+}
+
static int cb_dump_neigh(struct nl_msg *msg, void *arg)
{
char buf[32];
- struct ether_addr *addr;
+ struct ether_addr *mac;
+ struct in6_addr *dst;
struct dump_state *s = arg;
struct dump_filter *f = s->filter;
struct nlmsghdr *hdr = nlmsg_hdr(msg);
struct ndmsg *nd = NLMSG_DATA(hdr);
struct nlattr *tb[NDA_MAX+1];
+ int bitlen;
if (hdr->nlmsg_type != RTM_NEWNEIGH ||
(nd->ndm_family != AF_INET && nd->ndm_family != AF_INET6))
return NL_SKIP;
+ nlmsg_parse(hdr, sizeof(*nd), tb, NDA_MAX, NULL);
+
+ mac = tb[NDA_LLADDR] ? RTA_DATA(tb[NDA_LLADDR]) : NULL;
+ dst = tb[NDA_DST] ? RTA_DATA(tb[NDA_DST]) : NULL;
+
+ bitlen = (nd->ndm_family == AF_INET) ? 32 : 128;
+
if ((f->family && nd->ndm_family != f->family) ||
(f->iif && nd->ndm_ifindex != f->iif) ||
- (f->type && !(f->type & nd->ndm_state)))
+ (f->type && !(f->type & nd->ndm_state)) ||
+ diff_prefix(nd->ndm_family, dst, bitlen, &f->dst) ||
+ diff_macaddr(mac, &f->mac))
goto out;
- nlmsg_parse(hdr, sizeof(*nd), tb, NDA_MAX, NULL);
-
if (s->callback)
lua_pushvalue(s->L, 2);
@@ -1069,16 +1092,15 @@ static int cb_dump_neigh(struct nl_msg *msg, void *arg)
L_setbool(s->L, "noarp", (nd->ndm_state & NUD_NOARP));
L_setbool(s->L, "permanent", (nd->ndm_state & NUD_PERMANENT));
- if (tb[NDA_DST])
- L_setaddr(s->L, "dest", nd->ndm_family, RTA_DATA(tb[NDA_DST]), -1);
+ if (dst)
+ L_setaddr(s->L, "dest", nd->ndm_family, dst, -1);
- if (tb[NDA_LLADDR])
+ if (mac)
{
- addr = RTA_DATA(tb[NDA_LLADDR]);
snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
- addr->ether_addr_octet[0], addr->ether_addr_octet[1],
- addr->ether_addr_octet[2], addr->ether_addr_octet[3],
- addr->ether_addr_octet[4], addr->ether_addr_octet[5]);
+ mac->ether_addr_octet[0], mac->ether_addr_octet[1],
+ mac->ether_addr_octet[2], mac->ether_addr_octet[3],
+ mac->ether_addr_octet[4], mac->ether_addr_octet[5]);
lua_pushstring(s->L, buf);
lua_setfield(s->L, -2, "mac");
@@ -1098,10 +1120,10 @@ out:
static int neighbor_dump(lua_State *L)
{
+ cidr_t p;
const char *s;
- struct dump_filter filter = {
- .type = 0xFF & ~NUD_NOARP
- };
+ struct ether_addr *mac;
+ struct dump_filter filter = { .type = 0xFF & ~NUD_NOARP };
struct dump_state st = {
.callback = lua_isfunction(L, 2),
.pending = 1,
@@ -1122,6 +1144,13 @@ static int neighbor_dump(lua_State *L)
if ((s = L_getstr(L, 1, "dev")) != NULL)
filter.iif = if_nametoindex(s);
+
+ if ((s = L_getstr(L, 1, "dest")) != NULL && parse_cidr(s, &p))
+ filter.dst = p;
+
+ if ((s = L_getstr(L, 1, "mac")) != NULL &&
+ (mac = ether_aton(s)) != NULL)
+ filter.mac = *mac;
}
if (!sock)