From 76e21053b5bf33a07c76f99d27a74238310e3c71 Mon Sep 17 00:00:00 2001 From: "Erich E. Hoover" Date: Wed, 8 Feb 2012 09:11:07 +0000 Subject: ipv4: Implement IP_UNICAST_IF socket option. The IP_UNICAST_IF feature is needed by the Wine project. This patch implements the feature by setting the outgoing interface in a similar fashion to that of IP_MULTICAST_IF. A separate option is needed to handle this feature since the existing options do not provide all of the characteristics required by IP_UNICAST_IF, a summary is provided below. SO_BINDTODEVICE: * SO_BINDTODEVICE requires administrative privileges, IP_UNICAST_IF does not. From reading some old mailing list articles my understanding is that SO_BINDTODEVICE requires administrative privileges because it can override the administrator's routing settings. * The SO_BINDTODEVICE option restricts both outbound and inbound traffic, IP_UNICAST_IF only impacts outbound traffic. IP_PKTINFO: * Since IP_PKTINFO and IP_UNICAST_IF are independent options, implementing IP_UNICAST_IF with IP_PKTINFO will likely break some applications. * Implementing IP_UNICAST_IF on top of IP_PKTINFO significantly complicates the Wine codebase and reduces the socket performance (doing this requires a lot of extra communication between the "server" and "user" layers). bind(): * bind() does not work on broadcast packets, IP_UNICAST_IF is specifically intended to work with broadcast packets. * Like SO_BINDTODEVICE, bind() restricts both outbound and inbound traffic. Signed-off-by: Erich E. Hoover Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv4/ping.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/ipv4/ping.c') diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index aea5a199c37a..cfc82cf339f6 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -556,7 +556,8 @@ static int ping_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, ipc.oif = inet->mc_index; if (!saddr) saddr = inet->mc_addr; - } + } else if (!ipc.oif) + ipc.oif = inet->uc_index; flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, RT_SCOPE_UNIVERSE, sk->sk_protocol, -- cgit v1.2.3 From 058bd4d2a4ff0aaa4a5381c67e776729d840c785 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Sun, 11 Mar 2012 18:36:11 +0000 Subject: net: Convert printks to pr_ Use a more current kernel messaging style. Convert a printk block to print_hex_dump. Coalesce formats, align arguments. Use %s, __func__ instead of embedding function names. Some messages that were prefixed with _close are now prefixed with _fini. Some ah4 and esp messages are now not prefixed with "ip ". The intent of this patch is to later add something like #define pr_fmt(fmt) "IPv4: " fmt. to standardize the output messages. Text size is trivially reduced. (x86-32 allyesconfig) $ size net/ipv4/built-in.o* text data bss dec hex filename 887888 31558 249696 1169142 11d6f6 net/ipv4/built-in.o.new 887934 31558 249800 1169292 11d78c net/ipv4/built-in.o.old Signed-off-by: Joe Perches Signed-off-by: David S. Miller --- net/ipv4/ping.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'net/ipv4/ping.c') diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index 4398a45a9600..ab6b36e6da15 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -156,7 +156,7 @@ static struct sock *ping_v4_lookup(struct net *net, __be32 saddr, __be32 daddr, struct hlist_nulls_node *hnode; pr_debug("try to find: num = %d, daddr = %pI4, dif = %d\n", - (int)ident, &daddr, dif); + (int)ident, &daddr, dif); read_lock_bh(&ping_table.lock); ping_portaddr_for_each_entry(sk, hnode, hslot) { @@ -229,7 +229,7 @@ static int ping_init_sock(struct sock *sk) static void ping_close(struct sock *sk, long timeout) { pr_debug("ping_close(sk=%p,sk->num=%u)\n", - inet_sk(sk), inet_sk(sk)->inet_num); + inet_sk(sk), inet_sk(sk)->inet_num); pr_debug("isk->refcnt = %d\n", sk->sk_refcnt.counter); sk_common_release(sk); @@ -252,7 +252,7 @@ static int ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) return -EINVAL; pr_debug("ping_v4_bind(sk=%p,sa_addr=%08x,sa_port=%d)\n", - sk, addr->sin_addr.s_addr, ntohs(addr->sin_port)); + sk, addr->sin_addr.s_addr, ntohs(addr->sin_port)); chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr); if (addr->sin_addr.s_addr == htonl(INADDR_ANY)) @@ -280,9 +280,9 @@ static int ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) } pr_debug("after bind(): num = %d, daddr = %pI4, dif = %d\n", - (int)isk->inet_num, - &isk->inet_rcv_saddr, - (int)sk->sk_bound_dev_if); + (int)isk->inet_num, + &isk->inet_rcv_saddr, + (int)sk->sk_bound_dev_if); err = 0; if (isk->inet_rcv_saddr) @@ -335,7 +335,7 @@ void ping_err(struct sk_buff *skb, u32 info) return; pr_debug("ping_err(type=%04x,code=%04x,id=%04x,seq=%04x)\n", type, - code, ntohs(icmph->un.echo.id), ntohs(icmph->un.echo.sequence)); + code, ntohs(icmph->un.echo.id), ntohs(icmph->un.echo.sequence)); sk = ping_v4_lookup(net, iph->daddr, iph->saddr, ntohs(icmph->un.echo.id), skb->dev->ifindex); @@ -679,7 +679,7 @@ out: static int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) { pr_debug("ping_queue_rcv_skb(sk=%p,sk->num=%d,skb=%p)\n", - inet_sk(sk), inet_sk(sk)->inet_num, skb); + inet_sk(sk), inet_sk(sk)->inet_num, skb); if (sock_queue_rcv_skb(sk, skb) < 0) { kfree_skb(skb); pr_debug("ping_queue_rcv_skb -> failed\n"); @@ -705,7 +705,7 @@ void ping_rcv(struct sk_buff *skb) /* We assume the packet has already been checked by icmp_rcv */ pr_debug("ping_rcv(skb=%p,id=%04x,seq=%04x)\n", - skb, ntohs(icmph->un.echo.id), ntohs(icmph->un.echo.sequence)); + skb, ntohs(icmph->un.echo.id), ntohs(icmph->un.echo.sequence)); /* Push ICMP header back */ skb_push(skb, skb->data - (u8 *)icmph); -- cgit v1.2.3