[PATCH net-next 1/5] ipv6: icmp: add a force_saddr param to icmp6_send()
From: Eric Dumazet <edumazet@google.com>
Date: 2016-06-18 23:27:00
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
SIT or GRE tunnels might want to translate an IPV4 address into a v4mapped one when translating ICMP to ICMPv6. This patch adds the parameter to icmp6_send() but does not change icmpv6_send() signature. Signed-off-by: Eric Dumazet <edumazet@google.com> --- include/linux/icmpv6.h | 3 ++- net/ipv6/icmp.c | 7 +++++-- net/ipv6/ip6_icmp.c | 2 +- 3 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/include/linux/icmpv6.h b/include/linux/icmpv6.h
index 630f45335c73..432611a297fb 100644
--- a/include/linux/icmpv6.h
+++ b/include/linux/icmpv6.h@@ -14,7 +14,8 @@ static inline struct icmp6hdr *icmp6_hdr(const struct sk_buff *skb) #if IS_ENABLED(CONFIG_IPV6) extern void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info); -typedef void ip6_icmp_send_t(struct sk_buff *skb, u8 type, u8 code, __u32 info); +typedef void ip6_icmp_send_t(struct sk_buff *skb, u8 type, u8 code, __u32 info, + const struct in6_addr *force_saddr); extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn); extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn);
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index e32a72fb9982..6c57e6e90301 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c@@ -388,7 +388,8 @@ relookup_failed: /* * Send an ICMP message in response to a packet in error */ -static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info) +static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info, + const struct in6_addr *force_saddr) { struct net *net = dev_net(skb->dev); struct inet6_dev *idev = NULL;
@@ -475,6 +476,8 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info) memset(&fl6, 0, sizeof(fl6)); fl6.flowi6_proto = IPPROTO_ICMPV6; fl6.daddr = hdr->saddr; + if (force_saddr) + saddr = force_saddr; if (saddr) fl6.saddr = *saddr; fl6.flowi6_mark = mark;
@@ -551,7 +554,7 @@ out: */ void icmpv6_param_prob(struct sk_buff *skb, u8 code, int pos) { - icmp6_send(skb, ICMPV6_PARAMPROB, code, pos); + icmp6_send(skb, ICMPV6_PARAMPROB, code, pos, NULL); kfree_skb(skb); }
diff --git a/net/ipv6/ip6_icmp.c b/net/ipv6/ip6_icmp.c
index 14dacc544c3e..713676f14a0e 100644
--- a/net/ipv6/ip6_icmp.c
+++ b/net/ipv6/ip6_icmp.c@@ -39,7 +39,7 @@ void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info) if (!send) goto out; - send(skb, type, code, info); + send(skb, type, code, info, NULL); out: rcu_read_unlock(); }
--
2.8.0.rc3.226.g39d4020