101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
|
#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/udp.h>
|
||
|
|
#include <net/udp_tunnel.h>
|
||
|
|
#include <net/net_namespace.h>
|
||
|
|
|
||
|
|
int udp_sock_create(struct net *net, struct udp_port_cfg *cfg,
|
||
|
|
struct socket **sockp)
|
||
|
|
{
|
||
|
|
int err = -EINVAL;
|
||
|
|
struct socket *sock = NULL;
|
||
|
|
|
||
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
||
|
|
if (cfg->family == AF_INET6) {
|
||
|
|
struct sockaddr_in6 udp6_addr;
|
||
|
|
|
||
|
|
err = sock_create_kern(AF_INET6, SOCK_DGRAM, 0, &sock);
|
||
|
|
if (err < 0)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
sk_change_net(sock->sk, net);
|
||
|
|
|
||
|
|
udp6_addr.sin6_family = AF_INET6;
|
||
|
|
memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
|
||
|
|
sizeof(udp6_addr.sin6_addr));
|
||
|
|
udp6_addr.sin6_port = cfg->local_udp_port;
|
||
|
|
err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
|
||
|
|
sizeof(udp6_addr));
|
||
|
|
if (err < 0)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
if (cfg->peer_udp_port) {
|
||
|
|
udp6_addr.sin6_family = AF_INET6;
|
||
|
|
memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
|
||
|
|
sizeof(udp6_addr.sin6_addr));
|
||
|
|
udp6_addr.sin6_port = cfg->peer_udp_port;
|
||
|
|
err = kernel_connect(sock,
|
||
|
|
(struct sockaddr *)&udp6_addr,
|
||
|
|
sizeof(udp6_addr), 0);
|
||
|
|
}
|
||
|
|
if (err < 0)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
|
||
|
|
udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
|
||
|
|
} else
|
||
|
|
#endif
|
||
|
|
if (cfg->family == AF_INET) {
|
||
|
|
struct sockaddr_in udp_addr;
|
||
|
|
|
||
|
|
err = sock_create_kern(AF_INET, SOCK_DGRAM, 0, &sock);
|
||
|
|
if (err < 0)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
sk_change_net(sock->sk, net);
|
||
|
|
|
||
|
|
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;
|
||
|
|
} else {
|
||
|
|
return -EPFNOSUPPORT;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
*sockp = sock;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
error:
|
||
|
|
if (sock) {
|
||
|
|
kernel_sock_shutdown(sock, SHUT_RDWR);
|
||
|
|
sk_release_kernel(sock->sk);
|
||
|
|
}
|
||
|
|
*sockp = NULL;
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(udp_sock_create);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL");
|