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