Release 4.15 net/ipv4/datagram.c
/*
* common UDP/RAW code
* Linux INET implementation
*
* Authors:
* Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/ip.h>
#include <linux/in.h>
#include <net/ip.h>
#include <net/sock.h>
#include <net/route.h>
#include <net/tcp_states.h>
int __ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
struct inet_sock *inet = inet_sk(sk);
struct sockaddr_in *usin = (struct sockaddr_in *) uaddr;
struct flowi4 *fl4;
struct rtable *rt;
__be32 saddr;
int oif;
int err;
if (addr_len < sizeof(*usin))
return -EINVAL;
if (usin->sin_family != AF_INET)
return -EAFNOSUPPORT;
sk_dst_reset(sk);
oif = sk->sk_bound_dev_if;
saddr = inet->inet_saddr;
if (ipv4_is_multicast(usin->sin_addr.s_addr)) {
if (!oif)
oif = inet->mc_index;
if (!saddr)
saddr = inet->mc_addr;
}
fl4 = &inet->cork.fl.u.ip4;
rt = ip_route_connect(fl4, usin->sin_addr.s_addr, saddr,
RT_CONN_FLAGS(sk), oif,
sk->sk_protocol,
inet->inet_sport, usin->sin_port, sk);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
if (err == -ENETUNREACH)
IP_INC_STATS(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);
goto out;
}
if ((rt->rt_flags & RTCF_BROADCAST) && !sock_flag(sk, SOCK_BROADCAST)) {
ip_rt_put(rt);
err = -EACCES;
goto out;
}
if (!inet->inet_saddr)
inet->inet_saddr = fl4->saddr; /* Update source address */
if (!inet->inet_rcv_saddr) {
inet->inet_rcv_saddr = fl4->saddr;
if (sk->sk_prot->rehash)
sk->sk_prot->rehash(sk);
}
inet->inet_daddr = fl4->daddr;
inet->inet_dport = usin->sin_port;
sk->sk_state = TCP_ESTABLISHED;
sk_set_txhash(sk);
inet->inet_id = jiffies;
sk_dst_set(sk, &rt->dst);
err = 0;
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hideaki Yoshifuji / 吉藤英明 | 242 | 67.79% | 1 | 5.88% |
| David S. Miller | 55 | 15.41% | 5 | 29.41% |
| Eric Dumazet | 34 | 9.52% | 4 | 23.53% |
| Wei Dong | 13 | 3.64% | 1 | 5.88% |
| Tom Herbert | 5 | 1.40% | 2 | 11.76% |
| Pavel Emelyanov | 5 | 1.40% | 1 | 5.88% |
| Al Viro | 1 | 0.28% | 1 | 5.88% |
| Arnaldo Carvalho de Melo | 1 | 0.28% | 1 | 5.88% |
| Joe Perches | 1 | 0.28% | 1 | 5.88% |
| Total | 357 | 100.00% | 17 | 100.00% |
EXPORT_SYMBOL(__ip4_datagram_connect);
int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
int res;
lock_sock(sk);
res = __ip4_datagram_connect(sk, uaddr, addr_len);
release_sock(sk);
return res;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric Dumazet | 37 | 82.22% | 1 | 33.33% |
| David S. Miller | 6 | 13.33% | 1 | 33.33% |
| Hideaki Yoshifuji / 吉藤英明 | 2 | 4.44% | 1 | 33.33% |
| Total | 45 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(ip4_datagram_connect);
/* Because UDP xmit path can manipulate sk_dst_cache without holding
* socket lock, we need to use sk_dst_set() here,
* even if we own the socket lock.
*/
void ip4_datagram_release_cb(struct sock *sk)
{
const struct inet_sock *inet = inet_sk(sk);
const struct ip_options_rcu *inet_opt;
__be32 daddr = inet->inet_daddr;
struct dst_entry *dst;
struct flowi4 fl4;
struct rtable *rt;
rcu_read_lock();
dst = __sk_dst_get(sk);
if (!dst || !dst->obsolete || dst->ops->check(dst, 0)) {
rcu_read_unlock();
return;
}
inet_opt = rcu_dereference(inet->inet_opt);
if (inet_opt && inet_opt->opt.srr)
daddr = inet_opt->opt.faddr;
rt = ip_route_output_ports(sock_net(sk), &fl4, sk, daddr,
inet->inet_saddr, inet->inet_dport,
inet->inet_sport, sk->sk_protocol,
RT_CONN_FLAGS(sk), sk->sk_bound_dev_if);
dst = !IS_ERR(rt) ? &rt->dst : NULL;
sk_dst_set(sk, dst);
rcu_read_unlock();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Steffen Klassert | 138 | 77.09% | 1 | 50.00% |
| Eric Dumazet | 41 | 22.91% | 1 | 50.00% |
| Total | 179 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(ip4_datagram_release_cb);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hideaki Yoshifuji / 吉藤英明 | 269 | 43.25% | 1 | 4.76% |
| Steffen Klassert | 143 | 22.99% | 1 | 4.76% |
| Eric Dumazet | 118 | 18.97% | 5 | 23.81% |
| David S. Miller | 61 | 9.81% | 5 | 23.81% |
| Wei Dong | 13 | 2.09% | 1 | 4.76% |
| Arnaldo Carvalho de Melo | 6 | 0.96% | 3 | 14.29% |
| Pavel Emelyanov | 5 | 0.80% | 1 | 4.76% |
| Tom Herbert | 5 | 0.80% | 2 | 9.52% |
| Al Viro | 1 | 0.16% | 1 | 4.76% |
| Joe Perches | 1 | 0.16% | 1 | 4.76% |
| Total | 622 | 100.00% | 21 | 100.00% |
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