sockopt.h 3.9 KB

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  1. /* Router advertisement
  2. * Copyright (C) 1999 Kunihiro Ishiguro
  3. *
  4. * This file is part of GNU Zebra.
  5. *
  6. * GNU Zebra is free software; you can redistribute it and/or modify it
  7. * under the terms of the GNU General Public License as published by the
  8. * Free Software Foundation; either version 2, or (at your option) any
  9. * later version.
  10. *
  11. * GNU Zebra is distributed in the hope that it will be useful, but
  12. * WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14. * General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU General Public License
  17. * along with GNU Zebra; see the file COPYING. If not, write to the Free
  18. * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19. * 02111-1307, USA.
  20. */
  21. #ifndef _ZEBRA_SOCKOPT_H
  22. #define _ZEBRA_SOCKOPT_H
  23. #include "sockunion.h"
  24. extern int setsockopt_so_recvbuf (int sock, int size);
  25. extern int setsockopt_so_sendbuf (const int sock, int size);
  26. extern int getsockopt_so_sendbuf (const int sock);
  27. #ifdef HAVE_IPV6
  28. extern int setsockopt_ipv6_pktinfo (int, int);
  29. extern int setsockopt_ipv6_checksum (int, int);
  30. extern int setsockopt_ipv6_multicast_hops (int, int);
  31. extern int setsockopt_ipv6_unicast_hops (int, int);
  32. extern int setsockopt_ipv6_hoplimit (int, int);
  33. extern int setsockopt_ipv6_multicast_loop (int, int);
  34. extern int setsockopt_ipv6_tclass (int, int);
  35. #endif /* HAVE_IPV6 */
  36. /*
  37. * It is OK to reference in6_pktinfo here without a protecting #if
  38. * because this macro will only be used #if HAVE_IPV6, and in6_pktinfo
  39. * is not optional for HAVE_IPV6.
  40. */
  41. #define SOPT_SIZE_CMSG_PKTINFO_IPV6() (sizeof (struct in6_pktinfo));
  42. /*
  43. * Size defines for control messages used to get ifindex. We define
  44. * values for each method, and define a macro that can be used by code
  45. * that is unaware of which method is in use.
  46. * These values are without any alignment needed (see CMSG_SPACE in RFC3542).
  47. */
  48. #if defined (IP_PKTINFO)
  49. /* Linux in_pktinfo. */
  50. #define SOPT_SIZE_CMSG_PKTINFO_IPV4() (CMSG_SPACE(sizeof (struct in_pktinfo)))
  51. /* XXX This should perhaps be defined even if IP_PKTINFO is not. */
  52. #define SOPT_SIZE_CMSG_PKTINFO(af) \
  53. ((af == AF_INET) ? SOPT_SIZE_CMSG_PKTINFO_IPV4() \
  54. : SOPT_SIZE_CMSG_PKTINFO_IPV6()
  55. #endif /* IP_PKTINFO */
  56. #if defined (IP_RECVIF)
  57. /* BSD/Solaris */
  58. #if defined (SUNOS_5)
  59. #define SOPT_SIZE_CMSG_RECVIF_IPV4() (sizeof (uint_t))
  60. #else
  61. #define SOPT_SIZE_CMSG_RECVIF_IPV4() (sizeof (struct sockaddr_dl))
  62. #endif /* SUNOS_5 */
  63. #endif /* IP_RECVIF */
  64. /* SOPT_SIZE_CMSG_IFINDEX_IPV4 - portable type */
  65. #if defined (SOPT_SIZE_CMSG_PKTINFO)
  66. #define SOPT_SIZE_CMSG_IFINDEX_IPV4() SOPT_SIZE_CMSG_PKTINFO_IPV4()
  67. #elif defined (SOPT_SIZE_CMSG_RECVIF_IPV4)
  68. #define SOPT_SIZE_CMSG_IFINDEX_IPV4() SOPT_SIZE_CMSG_RECVIF_IPV4()
  69. #else /* Nothing available */
  70. #define SOPT_SIZE_CMSG_IFINDEX_IPV4() (sizeof (char *))
  71. #endif /* SOPT_SIZE_CMSG_IFINDEX_IPV4 */
  72. #define SOPT_SIZE_CMSG_IFINDEX(af) \
  73. (((af) == AF_INET) : SOPT_SIZE_CMSG_IFINDEX_IPV4() \
  74. ? SOPT_SIZE_CMSG_PKTINFO_IPV6())
  75. extern int setsockopt_ipv4_multicast_if(int sock, ifindex_t ifindex);
  76. extern int setsockopt_ipv4_multicast(int sock, int optname,
  77. unsigned int mcast_addr,
  78. ifindex_t ifindex);
  79. extern int setsockopt_ipv4_tos(int sock, int tos);
  80. /* Ask for, and get, ifindex, by whatever method is supported. */
  81. extern int setsockopt_ifindex (int, int, ifindex_t);
  82. extern ifindex_t getsockopt_ifindex (int, struct msghdr *);
  83. /* swab the fields in iph between the host order and system order expected
  84. * for IP_HDRINCL.
  85. */
  86. extern void sockopt_iphdrincl_swab_htosys (struct ip *iph);
  87. extern void sockopt_iphdrincl_swab_systoh (struct ip *iph);
  88. extern int sockopt_tcp_rtt (int);
  89. extern int sockopt_tcp_signature(int sock, union sockunion *su,
  90. const char *password);
  91. #endif /*_ZEBRA_SOCKOPT_H */