diff options
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 98 | 
1 files changed, 1 insertions, 97 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 4a5daecbd2ac..ae6fad99a9a9 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c  | |||
| @@ -1832,101 +1832,6 @@ do_time_wait: | |||
| 1832 | goto discard_it; | 1832 | goto discard_it; | 
| 1833 | } | 1833 | } | 
| 1834 | 1834 | ||
| 1835 | static int tcp_v4_reselect_saddr(struct sock *sk) | ||
| 1836 | { | ||
| 1837 | struct inet_sock *inet = inet_sk(sk); | ||
| 1838 | int err; | ||
| 1839 | struct rtable *rt; | ||
| 1840 | __u32 old_saddr = inet->saddr; | ||
| 1841 | __u32 new_saddr; | ||
| 1842 | __u32 daddr = inet->daddr; | ||
| 1843 | |||
| 1844 | if (inet->opt && inet->opt->srr) | ||
| 1845 | daddr = inet->opt->faddr; | ||
| 1846 | |||
| 1847 | /* Query new route. */ | ||
| 1848 | err = ip_route_connect(&rt, daddr, 0, | ||
| 1849 | RT_CONN_FLAGS(sk), | ||
| 1850 | sk->sk_bound_dev_if, | ||
| 1851 | IPPROTO_TCP, | ||
| 1852 | inet->sport, inet->dport, sk); | ||
| 1853 | if (err) | ||
| 1854 | return err; | ||
| 1855 | |||
| 1856 | sk_setup_caps(sk, &rt->u.dst); | ||
| 1857 | |||
| 1858 | new_saddr = rt->rt_src; | ||
| 1859 | |||
| 1860 | if (new_saddr == old_saddr) | ||
| 1861 | return 0; | ||
| 1862 | |||
| 1863 | if (sysctl_ip_dynaddr > 1) { | ||
| 1864 | printk(KERN_INFO "tcp_v4_rebuild_header(): shifting inet->" | ||
| 1865 | "saddr from %d.%d.%d.%d to %d.%d.%d.%d\n", | ||
| 1866 | NIPQUAD(old_saddr), | ||
| 1867 | NIPQUAD(new_saddr)); | ||
| 1868 | } | ||
| 1869 | |||
| 1870 | inet->saddr = new_saddr; | ||
| 1871 | inet->rcv_saddr = new_saddr; | ||
| 1872 | |||
| 1873 | /* XXX The only one ugly spot where we need to | ||
| 1874 | * XXX really change the sockets identity after | ||
| 1875 | * XXX it has entered the hashes. -DaveM | ||
| 1876 | * | ||
| 1877 | * Besides that, it does not check for connection | ||
| 1878 | * uniqueness. Wait for troubles. | ||
| 1879 | */ | ||
| 1880 | __sk_prot_rehash(sk); | ||
| 1881 | return 0; | ||
| 1882 | } | ||
| 1883 | |||
| 1884 | int tcp_v4_rebuild_header(struct sock *sk) | ||
| 1885 | { | ||
| 1886 | struct inet_sock *inet = inet_sk(sk); | ||
| 1887 | struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0); | ||
| 1888 | u32 daddr; | ||
| 1889 | int err; | ||
| 1890 | |||
| 1891 | /* Route is OK, nothing to do. */ | ||
| 1892 | if (rt) | ||
| 1893 | return 0; | ||
| 1894 | |||
| 1895 | /* Reroute. */ | ||
| 1896 | daddr = inet->daddr; | ||
| 1897 | if (inet->opt && inet->opt->srr) | ||
| 1898 | daddr = inet->opt->faddr; | ||
| 1899 | |||
| 1900 | { | ||
| 1901 | struct flowi fl = { .oif = sk->sk_bound_dev_if, | ||
| 1902 | .nl_u = { .ip4_u = | ||
| 1903 | { .daddr = daddr, | ||
| 1904 | .saddr = inet->saddr, | ||
| 1905 | .tos = RT_CONN_FLAGS(sk) } }, | ||
| 1906 | .proto = IPPROTO_TCP, | ||
| 1907 | .uli_u = { .ports = | ||
| 1908 | { .sport = inet->sport, | ||
| 1909 | .dport = inet->dport } } }; | ||
| 1910 | |||
| 1911 | err = ip_route_output_flow(&rt, &fl, sk, 0); | ||
| 1912 | } | ||
| 1913 | if (!err) { | ||
| 1914 | sk_setup_caps(sk, &rt->u.dst); | ||
| 1915 | return 0; | ||
| 1916 | } | ||
| 1917 | |||
| 1918 | /* Routing failed... */ | ||
| 1919 | sk->sk_route_caps = 0; | ||
| 1920 | |||
| 1921 | if (!sysctl_ip_dynaddr || | ||
| 1922 | sk->sk_state != TCP_SYN_SENT || | ||
| 1923 | (sk->sk_userlocks & SOCK_BINDADDR_LOCK) || | ||
| 1924 | (err = tcp_v4_reselect_saddr(sk)) != 0) | ||
| 1925 | sk->sk_err_soft = -err; | ||
| 1926 | |||
| 1927 | return err; | ||
| 1928 | } | ||
| 1929 | |||
| 1930 | static void v4_addr2sockaddr(struct sock *sk, struct sockaddr * uaddr) | 1835 | static void v4_addr2sockaddr(struct sock *sk, struct sockaddr * uaddr) | 
| 1931 | { | 1836 | { | 
| 1932 | struct sockaddr_in *sin = (struct sockaddr_in *) uaddr; | 1837 | struct sockaddr_in *sin = (struct sockaddr_in *) uaddr; | 
| @@ -1998,7 +1903,7 @@ int tcp_v4_tw_remember_stamp(struct tcp_tw_bucket *tw) | |||
| 1998 | struct tcp_func ipv4_specific = { | 1903 | struct tcp_func ipv4_specific = { | 
| 1999 | .queue_xmit = ip_queue_xmit, | 1904 | .queue_xmit = ip_queue_xmit, | 
| 2000 | .send_check = tcp_v4_send_check, | 1905 | .send_check = tcp_v4_send_check, | 
| 2001 | .rebuild_header = tcp_v4_rebuild_header, | 1906 | .rebuild_header = inet_sk_rebuild_header, | 
| 2002 | .conn_request = tcp_v4_conn_request, | 1907 | .conn_request = tcp_v4_conn_request, | 
| 2003 | .syn_recv_sock = tcp_v4_syn_recv_sock, | 1908 | .syn_recv_sock = tcp_v4_syn_recv_sock, | 
| 2004 | .remember_stamp = tcp_v4_remember_stamp, | 1909 | .remember_stamp = tcp_v4_remember_stamp, | 
| @@ -2630,7 +2535,6 @@ EXPORT_SYMBOL(tcp_unhash); | |||
| 2630 | EXPORT_SYMBOL(tcp_v4_conn_request); | 2535 | EXPORT_SYMBOL(tcp_v4_conn_request); | 
| 2631 | EXPORT_SYMBOL(tcp_v4_connect); | 2536 | EXPORT_SYMBOL(tcp_v4_connect); | 
| 2632 | EXPORT_SYMBOL(tcp_v4_do_rcv); | 2537 | EXPORT_SYMBOL(tcp_v4_do_rcv); | 
| 2633 | EXPORT_SYMBOL(tcp_v4_rebuild_header); | ||
| 2634 | EXPORT_SYMBOL(tcp_v4_remember_stamp); | 2538 | EXPORT_SYMBOL(tcp_v4_remember_stamp); | 
| 2635 | EXPORT_SYMBOL(tcp_v4_send_check); | 2539 | EXPORT_SYMBOL(tcp_v4_send_check); | 
| 2636 | EXPORT_SYMBOL(tcp_v4_syn_recv_sock); | 2540 | EXPORT_SYMBOL(tcp_v4_syn_recv_sock); | 
