cregit-Linux how code gets into the kernel

Release 4.11 net/ipv4/udp_tunnel.c

Directory: net/ipv4
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/socket.h>
#include <linux/udp.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <net/dst_metadata.h>
#include <net/net_namespace.h>
#include <net/udp.h>
#include <net/udp_tunnel.h>


int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg, struct socket **sockp) { int err; struct socket *sock = NULL; struct sockaddr_in udp_addr; err = sock_create_kern(net, AF_INET, SOCK_DGRAM, 0, &sock); if (err < 0) goto error; udp_addr.sin_family = AF_INET; udp_addr.sin_addr = cfg->local_ip; udp_addr.sin_port = cfg->local_udp_port; err = kernel_bind(sock, (struct sockaddr *)&udp_addr, sizeof(udp_addr)); if (err < 0) goto error; if (cfg->peer_udp_port) { udp_addr.sin_family = AF_INET; udp_addr.sin_addr = cfg->peer_ip; udp_addr.sin_port = cfg->peer_udp_port; err = kernel_connect(sock, (struct sockaddr *)&udp_addr, sizeof(udp_addr), 0); if (err < 0) goto error; } sock->sk->sk_no_check_tx = !cfg->use_udp_checksums; *sockp = sock; return 0; error: if (sock) { kernel_sock_shutdown(sock, SHUT_RDWR); sock_release(sock); } *sockp = NULL; return err; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Herbert21598.17%125.00%
Eric W. Biedermann31.37%250.00%
Andy Zhou10.46%125.00%
Total219100.00%4100.00%

EXPORT_SYMBOL(udp_sock_create4);
void setup_udp_tunnel_sock(struct net *net, struct socket *sock, struct udp_tunnel_sock_cfg *cfg) { struct sock *sk = sock->sk; /* Disable multicast loopback */ inet_sk(sk)->mc_loop = 0; /* Enable CHECKSUM_UNNECESSARY to CHECKSUM_COMPLETE conversion */ inet_inc_convert_csum(sk); rcu_assign_sk_user_data(sk, cfg->sk_user_data); udp_sk(sk)->encap_type = cfg->encap_type; udp_sk(sk)->encap_rcv = cfg->encap_rcv; udp_sk(sk)->encap_destroy = cfg->encap_destroy; udp_sk(sk)->gro_receive = cfg->gro_receive; udp_sk(sk)->gro_complete = cfg->gro_complete; udp_tunnel_encap_enable(sock); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Zhou9179.82%133.33%
Tom Herbert2320.18%266.67%
Total114100.00%3100.00%

EXPORT_SYMBOL_GPL(setup_udp_tunnel_sock);
void udp_tunnel_push_rx_port(struct net_device *dev, struct socket *sock, unsigned short type) { struct sock *sk = sock->sk; struct udp_tunnel_info ti; if (!dev->netdev_ops->ndo_udp_tunnel_add) return; ti.type = type; ti.sa_family = sk->sk_family; ti.port = inet_sk(sk)->inet_sport; dev->netdev_ops->ndo_udp_tunnel_add(dev, &ti); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Duyck79100.00%2100.00%
Total79100.00%2100.00%

EXPORT_SYMBOL_GPL(udp_tunnel_push_rx_port); /* Notify netdevs that UDP port started listening */
void udp_tunnel_notify_add_rx_port(struct socket *sock, unsigned short type) { struct sock *sk = sock->sk; struct net *net = sock_net(sk); struct udp_tunnel_info ti; struct net_device *dev; ti.type = type; ti.sa_family = sk->sk_family; ti.port = inet_sk(sk)->inet_sport; rcu_read_lock(); for_each_netdev_rcu(net, dev) { if (!dev->netdev_ops->ndo_udp_tunnel_add) continue; dev->netdev_ops->ndo_udp_tunnel_add(dev, &ti); } rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Duyck103100.00%3100.00%
Total103100.00%3100.00%

EXPORT_SYMBOL_GPL(udp_tunnel_notify_add_rx_port); /* Notify netdevs that UDP port is no more listening */
void udp_tunnel_notify_del_rx_port(struct socket *sock, unsigned short type) { struct sock *sk = sock->sk; struct net *net = sock_net(sk); struct udp_tunnel_info ti; struct net_device *dev; ti.type = type; ti.sa_family = sk->sk_family; ti.port = inet_sk(sk)->inet_sport; rcu_read_lock(); for_each_netdev_rcu(net, dev) { if (!dev->netdev_ops->ndo_udp_tunnel_del) continue; dev->netdev_ops->ndo_udp_tunnel_del(dev, &ti); } rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Duyck103100.00%2100.00%
Total103100.00%2100.00%

EXPORT_SYMBOL_GPL(udp_tunnel_notify_del_rx_port);
void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, __be16 src_port, __be16 dst_port, bool xnet, bool nocheck) { struct udphdr *uh; __skb_push(skb, sizeof(*uh)); skb_reset_transport_header(skb); uh = udp_hdr(skb); uh->dest = dst_port; uh->source = src_port; uh->len = htons(skb->len); memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); udp_set_csum(nocheck, skb, src, dst, skb->len); iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Zhou12577.64%120.00%
Bernie Harris2515.53%120.00%
David S. Miller53.11%120.00%
Tom Herbert42.48%120.00%
Pravin B Shelar21.24%120.00%
Total161100.00%5100.00%

EXPORT_SYMBOL_GPL(udp_tunnel_xmit_skb);
void udp_tunnel_sock_release(struct socket *sock) { rcu_assign_sk_user_data(sock->sk, NULL); kernel_sock_shutdown(sock, SHUT_RDWR); sock_release(sock); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Zhou3096.77%150.00%
Eric W. Biedermann13.23%150.00%
Total31100.00%2100.00%

EXPORT_SYMBOL_GPL(udp_tunnel_sock_release);
struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family, __be16 flags, __be64 tunnel_id, int md_size) { struct metadata_dst *tun_dst; struct ip_tunnel_info *info; if (family == AF_INET) tun_dst = ip_tun_rx_dst(skb, flags, tunnel_id, md_size); else tun_dst = ipv6_tun_rx_dst(skb, flags, tunnel_id, md_size); if (!tun_dst) return NULL; info = &tun_dst->u.tun_info; info->key.tp_src = udp_hdr(skb)->source; info->key.tp_dst = udp_hdr(skb)->dest; if (udp_hdr(skb)->check) info->key.tun_flags |= TUNNEL_CSUM; return tun_dst; }

Contributors

PersonTokensPropCommitsCommitProp
Pravin B Shelar131100.00%1100.00%
Total131100.00%1100.00%

EXPORT_SYMBOL_GPL(udp_tun_rx_dst); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Alexander Duyck30229.67%320.00%
Tom Herbert27527.01%426.67%
Andy Zhou26325.83%213.33%
Pravin B Shelar14414.15%213.33%
Bernie Harris252.46%16.67%
David S. Miller50.49%16.67%
Eric W. Biedermann40.39%213.33%
Total1018100.00%15100.00%
Directory: net/ipv4
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