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d998f8efa4
The UDP tunnel transmit functions udp_tunnel_xmit_skb and udp_tunnel6_xmit_skb include a socket argument. The socket being passed to the functions (from VXLAN) is a UDP created for receive side. The only thing that the socket is used for in the transmit functions is to get the setting for checksum (enabled or zero). This patch removes the argument and and adds a nocheck argument for checksum setting. This eliminates the unnecessary dependency on a UDP socket for UDP tunnel transmit. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
106 lines
2.5 KiB
C
106 lines
2.5 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 <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(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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*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_GPL(udp_sock_create6);
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int udp_tunnel6_xmit_skb(struct dst_entry *dst, 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, __be16 src_port,
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__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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memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
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IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
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| IPSKB_REROUTED);
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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, htonl(0));
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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(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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