utils.c 1.2 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344
  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /* Utility routines
  3. *
  4. * Copyright (C) 2015 Red Hat, Inc. All Rights Reserved.
  5. * Written by David Howells (dhowells@redhat.com)
  6. */
  7. #include <linux/ip.h>
  8. #include <linux/ipv6.h>
  9. #include <linux/udp.h>
  10. #include "ar-internal.h"
  11. /*
  12. * Fill out a peer address from a socket buffer containing a packet.
  13. */
  14. int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *srx, struct sk_buff *skb)
  15. {
  16. memset(srx, 0, sizeof(*srx));
  17. switch (ntohs(skb->protocol)) {
  18. case ETH_P_IP:
  19. srx->transport_type = SOCK_DGRAM;
  20. srx->transport_len = sizeof(srx->transport.sin);
  21. srx->transport.sin.sin_family = AF_INET;
  22. srx->transport.sin.sin_port = udp_hdr(skb)->source;
  23. srx->transport.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
  24. return 0;
  25. #ifdef CONFIG_AF_RXRPC_IPV6
  26. case ETH_P_IPV6:
  27. srx->transport_type = SOCK_DGRAM;
  28. srx->transport_len = sizeof(srx->transport.sin6);
  29. srx->transport.sin6.sin6_family = AF_INET6;
  30. srx->transport.sin6.sin6_port = udp_hdr(skb)->source;
  31. srx->transport.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
  32. return 0;
  33. #endif
  34. default:
  35. pr_warn_ratelimited("AF_RXRPC: Unknown eth protocol %u\n",
  36. ntohs(skb->protocol));
  37. return -EAFNOSUPPORT;
  38. }
  39. }