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114 lines
2.7 KiB
114 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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#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 <linux/in6.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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#include <net/netns/generic.h> |
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#include <net/ip6_tunnel.h> |
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#include <net/ip6_checksum.h> |
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int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, |
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struct socket **sockp) |
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{ |
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struct sockaddr_in6 udp6_addr = {}; |
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int err; |
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struct socket *sock = NULL; |
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err = sock_create_kern(net, AF_INET6, SOCK_DGRAM, 0, &sock); |
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if (err < 0) |
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goto error; |
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if (cfg->ipv6_v6only) { |
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err = ip6_sock_set_v6only(sock->sk); |
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if (err < 0) |
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goto error; |
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} |
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if (cfg->bind_ifindex) { |
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err = sock_bindtoindex(sock->sk, cfg->bind_ifindex, true); |
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if (err < 0) |
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goto error; |
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} |
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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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memset(&udp6_addr, 0, sizeof(udp6_addr)); |
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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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*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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sock_release(sock); |
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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_GPL(udp_sock_create6); |
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int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
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struct sk_buff *skb, |
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struct net_device *dev, struct in6_addr *saddr, |
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struct in6_addr *daddr, |
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__u8 prio, __u8 ttl, __be32 label, |
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__be16 src_port, __be16 dst_port, bool nocheck) |
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{ |
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struct udphdr *uh; |
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struct ipv6hdr *ip6h; |
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__skb_push(skb, sizeof(*uh)); |
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skb_reset_transport_header(skb); |
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uh = udp_hdr(skb); |
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uh->dest = dst_port; |
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uh->source = src_port; |
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uh->len = htons(skb->len); |
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skb_dst_set(skb, dst); |
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udp6_set_csum(nocheck, skb, saddr, daddr, skb->len); |
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__skb_push(skb, sizeof(*ip6h)); |
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skb_reset_network_header(skb); |
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ip6h = ipv6_hdr(skb); |
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ip6_flow_hdr(ip6h, prio, label); |
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ip6h->payload_len = htons(skb->len); |
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ip6h->nexthdr = IPPROTO_UDP; |
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ip6h->hop_limit = ttl; |
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ip6h->daddr = *daddr; |
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ip6h->saddr = *saddr; |
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ip6tunnel_xmit(sk, skb, dev); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb); |
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MODULE_LICENSE("GPL");
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