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-rw-r--r--src/config.c1
-rw-r--r--src/ndp.c124
-rw-r--r--src/odhcpd.h1
3 files changed, 72 insertions, 54 deletions
diff --git a/src/config.c b/src/config.c
index 16f003b..64639c9 100644
--- a/src/config.c
+++ b/src/config.c
@@ -433,6 +433,7 @@ int config_parse_interface(void *data, size_t len, const char *name, bool overwr
iface->router_event.uloop.fd = -1;
iface->dhcpv6_event.uloop.fd = -1;
iface->ndp_event.uloop.fd = -1;
+ iface->ndp_ping_fd = -1;
iface->dhcpv4_event.uloop.fd = -1;
set_interface_defaults(iface);
diff --git a/src/ndp.c b/src/ndp.c
index f9f2495..58fe14f 100644
--- a/src/ndp.c
+++ b/src/ndp.c
@@ -39,8 +39,6 @@ static void setup_addr_for_relaying(struct in6_addr *addr, struct interface *ifa
static void handle_solicit(void *addr, void *data, size_t len,
struct interface *iface, void *dest);
-static int ping_socket = -1;
-
/* Filter ICMPv6 messages of type neighbor soliciation */
static struct sock_filter bpf[] = {
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, offsetof(struct ip6_hdr, ip6_nxt)),
@@ -57,55 +55,11 @@ static struct netevent_handler ndp_netevent_handler = { .cb = ndp_netevent_cb, }
/* Initialize NDP-proxy */
int ndp_init(void)
{
- struct icmp6_filter filt;
- int val = 2, ret = 0;
-
- /* Open ICMPv6 socket */
- ping_socket = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6);
- if (ping_socket < 0) {
- syslog(LOG_ERR, "socket(AF_INET6): %m");
- ret = -1;
- goto out;
- }
+ int ret = 0;
- if (setsockopt(ping_socket, IPPROTO_RAW, IPV6_CHECKSUM,
- &val, sizeof(val)) < 0) {
- syslog(LOG_ERR, "setsockopt(IPV6_CHECKSUM): %m");
+ if (netlink_add_netevent_handler(&ndp_netevent_handler) < 0) {
+ syslog(LOG_ERR, "Failed to add ndp netevent handler");
ret = -1;
- goto out;
- }
-
- /* This is required by RFC 4861 */
- val = 255;
- if (setsockopt(ping_socket, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
- &val, sizeof(val)) < 0) {
- syslog(LOG_ERR, "setsockopt(IPV6_MULTICAST_HOPS): %m");
- ret = -1;
- goto out;
- }
-
- if (setsockopt(ping_socket, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
- &val, sizeof(val)) < 0) {
- syslog(LOG_ERR, "setsockopt(IPV6_UNICAST_HOPS): %m");
- ret = -1;
- goto out;
- }
-
- /* Filter all packages, we only want to send */
- ICMP6_FILTER_SETBLOCKALL(&filt);
- if (setsockopt(ping_socket, IPPROTO_ICMPV6, ICMP6_FILTER,
- &filt, sizeof(filt)) < 0) {
- syslog(LOG_ERR, "setsockopt(ICMP6_FILTER): %m");
- ret = -1;
- goto out;
- }
-
- netlink_add_netevent_handler(&ndp_netevent_handler);
-
-out:
- if (ret < 0 && ping_socket >= 0) {
- close(ping_socket);
- ping_socket = -1;
}
return ret;
@@ -125,6 +79,11 @@ int ndp_setup_interface(struct interface *iface, bool enable)
goto out;
}
+ if (iface->ndp_ping_fd >= 0) {
+ close(iface->ndp_ping_fd);
+ iface->ndp_ping_fd = -1;
+ }
+
if (iface->ndp_event.uloop.fd >= 0) {
uloop_fd_delete(&iface->ndp_event.uloop);
close(iface->ndp_event.uloop.fd);
@@ -139,9 +98,59 @@ int ndp_setup_interface(struct interface *iface, bool enable)
if (enable && iface->ndp == MODE_RELAY) {
struct sockaddr_ll ll;
struct packet_mreq mreq;
+ struct icmp6_filter filt;
+ int val = 2;
if (write(procfd, "1\n", 2) < 0) {}
+ /* Open ICMPv6 socket */
+ iface->ndp_ping_fd = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6);
+ if (iface->ndp_ping_fd < 0) {
+ syslog(LOG_ERR, "socket(AF_INET6): %m");
+ ret = -1;
+ goto out;
+ }
+
+ if (setsockopt(iface->ndp_ping_fd, SOL_SOCKET, SO_BINDTODEVICE,
+ iface->ifname, strlen(iface->ifname)) < 0) {
+ syslog(LOG_ERR, "setsockopt(SO_BINDTODEVICE): %m");
+ ret = -1;
+ goto out;
+ }
+
+ if (setsockopt(iface->ndp_ping_fd, IPPROTO_RAW, IPV6_CHECKSUM,
+ &val, sizeof(val)) < 0) {
+ syslog(LOG_ERR, "setsockopt(IPV6_CHECKSUM): %m");
+ ret = -1;
+ goto out;
+ }
+
+ /* This is required by RFC 4861 */
+ val = 255;
+ if (setsockopt(iface->ndp_ping_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
+ &val, sizeof(val)) < 0) {
+ syslog(LOG_ERR, "setsockopt(IPV6_MULTICAST_HOPS): %m");
+ ret = -1;
+ goto out;
+ }
+
+ if (setsockopt(iface->ndp_ping_fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
+ &val, sizeof(val)) < 0) {
+ syslog(LOG_ERR, "setsockopt(IPV6_UNICAST_HOPS): %m");
+ ret = -1;
+ goto out;
+ }
+
+ /* Filter all packages, we only want to send */
+ ICMP6_FILTER_SETBLOCKALL(&filt);
+ if (setsockopt(iface->ndp_ping_fd, IPPROTO_ICMPV6, ICMP6_FILTER,
+ &filt, sizeof(filt)) < 0) {
+ syslog(LOG_ERR, "setsockopt(ICMP6_FILTER): %m");
+ ret = -1;
+ goto out;
+ }
+
+
iface->ndp_event.uloop.fd = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC, htons(ETH_P_IPV6));
if (iface->ndp_event.uloop.fd < 0) {
syslog(LOG_ERR, "socket(AF_PACKET): %m");
@@ -203,9 +212,16 @@ int ndp_setup_interface(struct interface *iface, bool enable)
netlink_dump_neigh_table(true);
out:
- if (ret < 0 && iface->ndp_event.uloop.fd >= 0) {
- close(iface->ndp_event.uloop.fd);
- iface->ndp_event.uloop.fd = -1;
+ if (ret < 0) {
+ if (iface->ndp_event.uloop.fd >= 0) {
+ close(iface->ndp_event.uloop.fd);
+ iface->ndp_event.uloop.fd = -1;
+ }
+
+ if (iface->ndp_ping_fd >= 0) {
+ close(iface->ndp_ping_fd);
+ iface->ndp_ping_fd = -1;
+ }
}
if (procfd >= 0)
@@ -264,7 +280,7 @@ static void ndp_netevent_cb(unsigned long event, struct netevent_handler_info *i
static void ping6(struct in6_addr *addr,
const struct interface *iface)
{
- struct sockaddr_in6 dest = { .sin6_family = AF_INET6, .sin6_addr = *addr, .sin6_scope_id = iface->ifindex, };
+ struct sockaddr_in6 dest = { .sin6_family = AF_INET6, .sin6_addr = *addr , };
struct icmp6_hdr echo = { .icmp6_type = ICMP6_ECHO_REQUEST };
struct iovec iov = { .iov_base = &echo, .iov_len = sizeof(echo) };
char ipbuf[INET6_ADDRSTRLEN];
@@ -273,7 +289,7 @@ static void ping6(struct in6_addr *addr,
syslog(LOG_NOTICE, "Pinging for %s on %s", ipbuf, iface->name);
netlink_setup_route(addr, 128, iface->ifindex, NULL, 128, true);
- odhcpd_send(ping_socket, &dest, &iov, 1, iface);
+ odhcpd_send(iface->ndp_ping_fd, &dest, &iov, 1, iface);
netlink_setup_route(addr, 128, iface->ifindex, NULL, 128, false);
}
diff --git a/src/odhcpd.h b/src/odhcpd.h
index 42d0954..97d2113 100644
--- a/src/odhcpd.h
+++ b/src/odhcpd.h
@@ -218,6 +218,7 @@ struct interface {
// NDP runtime data
struct odhcpd_event ndp_event;
+ int ndp_ping_fd;
// IPv4 runtime data
struct odhcpd_ipaddr *addr4;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 08:17:04 +0000