Even ICMP needs to be updated to use the flowside mac address instead
of just the own tap address. We do that here.
Signed-off-by: Jon Maloy
---
icmp.c | 4 ++--
ndp.c | 2 +-
tap.c | 10 ++++++----
tap.h | 4 ++--
udp.c | 4 ++--
5 files changed, 13 insertions(+), 11 deletions(-)
diff --git a/icmp.c b/icmp.c
index 7e2b342..da85937 100644
--- a/icmp.c
+++ b/icmp.c
@@ -129,12 +129,12 @@ void icmp_sock_handler(const struct ctx *c, union epoll_ref ref)
const struct in_addr *daddr = inany_v4(&ini->eaddr);
ASSERT(saddr && daddr); /* Must have IPv4 addresses */
- tap_icmp4_send(c, *saddr, *daddr, buf, n);
+ tap_icmp4_send(c, *saddr, *daddr, buf, ini->mac, n);
} else if (pingf->f.type == FLOW_PING6) {
const struct in6_addr *saddr = &ini->oaddr.a6;
const struct in6_addr *daddr = &ini->eaddr.a6;
- tap_icmp6_send(c, saddr, daddr, buf, n);
+ tap_icmp6_send(c, saddr, daddr, buf, ini->mac, n);
}
return;
diff --git a/ndp.c b/ndp.c
index d702f37..a30d3a0 100644
--- a/ndp.c
+++ b/ndp.c
@@ -185,7 +185,7 @@ static void ndp_send(const struct ctx *c, const struct in6_addr *dst,
{
const struct in6_addr *src = &c->ip6.our_tap_ll;
- tap_icmp6_send(c, src, dst, buf, l4len);
+ tap_icmp6_send(c, src, dst, buf, c->our_tap_mac, l4len);
}
/**
diff --git a/tap.c b/tap.c
index 634c012..1d8963a 100644
--- a/tap.c
+++ b/tap.c
@@ -279,13 +279,14 @@ void tap_udp4_send(const struct ctx *c, struct in_addr src, in_port_t sport,
* @src: IPv4 source address
* @dst: IPv4 destination address
* @in: ICMP packet, including ICMP header
+ * @src_mac: MAC address to be used as source for message
* @l4len: ICMP packet length, including ICMP header
*/
void tap_icmp4_send(const struct ctx *c, struct in_addr src, struct in_addr dst,
- const void *in, size_t l4len)
+ const void *in, const void *src_mac, size_t l4len)
{
char buf[USHRT_MAX];
- struct iphdr *ip4h = tap_push_l2h(c, buf, NULL, ETH_P_IP);
+ struct iphdr *ip4h = tap_push_l2h(c, buf, src_mac, ETH_P_IP);
struct icmphdr *icmp4h = tap_push_ip4h(ip4h, src, dst,
l4len, IPPROTO_ICMP);
@@ -386,14 +387,15 @@ void tap_udp6_send(const struct ctx *c,
* @src: IPv6 source address
* @dst: IPv6 destination address
* @in: ICMP packet, including ICMP header
+ * @src_mac: MAC address to be used as source for message
* @l4len: ICMP packet length, including ICMP header
*/
void tap_icmp6_send(const struct ctx *c,
const struct in6_addr *src, const struct in6_addr *dst,
- const void *in, size_t l4len)
+ const void *in, const void *src_mac, size_t l4len)
{
char buf[USHRT_MAX];
- struct ipv6hdr *ip6h = tap_push_l2h(c, buf, NULL, ETH_P_IPV6);
+ struct ipv6hdr *ip6h = tap_push_l2h(c, buf, src_mac, ETH_P_IPV6);
struct icmp6hdr *icmp6h = tap_push_ip6h(ip6h, src, dst, l4len,
IPPROTO_ICMPV6, 0);
diff --git a/tap.h b/tap.h
index e640d95..7025eaa 100644
--- a/tap.h
+++ b/tap.h
@@ -91,7 +91,7 @@ void tap_udp4_send(const struct ctx *c, struct in_addr src, in_port_t sport,
struct in_addr dst, in_port_t dport,
const void *in, size_t dlen);
void tap_icmp4_send(const struct ctx *c, struct in_addr src, struct in_addr dst,
- const void *in, size_t l4len);
+ const void *in, const void *src_mac, size_t l4len);
const struct in6_addr *tap_ip6_daddr(const struct ctx *c,
const struct in6_addr *src);
void *tap_push_ip6h(struct ipv6hdr *ip6h,
@@ -103,7 +103,7 @@ void tap_udp6_send(const struct ctx *c,
uint32_t flow, void *in, size_t dlen);
void tap_icmp6_send(const struct ctx *c,
const struct in6_addr *src, const struct in6_addr *dst,
- const void *in, size_t l4len);
+ const void *in, const void *src_mac, size_t l4len);
void tap_send_single(const struct ctx *c, const void *data, size_t l2len);
size_t tap_send_frames(const struct ctx *c, const struct iovec *iov,
size_t bufs_per_frame, size_t nframes);
diff --git a/udp.c b/udp.c
index ae8fbaf..28ec061 100644
--- a/udp.c
+++ b/udp.c
@@ -419,7 +419,7 @@ static void udp_send_tap_icmp4(const struct ctx *c,
tap_push_uh4(&msg.uh, eaddr, eport, oaddr, oport, in, dlen);
memcpy(&msg.data, in, dlen);
- tap_icmp4_send(c, saddr, eaddr, &msg, msglen);
+ tap_icmp4_send(c, saddr, eaddr, &msg, toside->mac, msglen);
}
@@ -464,7 +464,7 @@ static void udp_send_tap_icmp6(const struct ctx *c,
tap_push_uh6(&msg.uh, eaddr, eport, oaddr, oport, in, dlen);
memcpy(&msg.data, in, dlen);
- tap_icmp6_send(c, saddr, eaddr, &msg, msglen);
+ tap_icmp6_send(c, saddr, eaddr, &msg, toside->mac, msglen);
}
/**
--
2.48.1