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. #endif /* HAVE_IPV6 */
  35. /*
  36. * It is OK to reference in6_pktinfo here without a protecting #if
  37. * because this macro will only be used #if HAVE_IPV6, and in6_pktinfo
  38. * is not optional for HAVE_IPV6.
  39. */
  40. #define SOPT_SIZE_CMSG_PKTINFO_IPV6() (sizeof (struct in6_pktinfo));
  41. /*
  42. * Size defines for control messages used to get ifindex. We define
  43. * values for each method, and define a macro that can be used by code
  44. * that is unaware of which method is in use.
  45. * These values are without any alignment needed (see CMSG_SPACE in RFC3542).
  46. */
  47. #if defined (IP_PKTINFO)
  48. /* Linux in_pktinfo. */
  49. #define SOPT_SIZE_CMSG_PKTINFO_IPV4() (CMSG_SPACE(sizeof (struct in_pktinfo)))
  50. /* XXX This should perhaps be defined even if IP_PKTINFO is not. */
  51. #define SOPT_SIZE_CMSG_PKTINFO(af) \
  52. ((af == AF_INET) ? SOPT_SIZE_CMSG_PKTINFO_IPV4() \
  53. : SOPT_SIZE_CMSG_PKTINFO_IPV6()
  54. #endif /* IP_PKTINFO */
  55. #if defined (IP_RECVIF)
  56. /* BSD/Solaris */
  57. #if defined (SUNOS_5)
  58. #define SOPT_SIZE_CMSG_RECVIF_IPV4() (sizeof (uint_t))
  59. #else
  60. #define SOPT_SIZE_CMSG_RECVIF_IPV4() (sizeof (struct sockaddr_dl))
  61. #endif /* SUNOS_5 */
  62. #endif /* IP_RECVIF */
  63. /* SOPT_SIZE_CMSG_IFINDEX_IPV4 - portable type */
  64. #if defined (SOPT_SIZE_CMSG_PKTINFO)
  65. #define SOPT_SIZE_CMSG_IFINDEX_IPV4() SOPT_SIZE_CMSG_PKTINFO_IPV4()
  66. #elif defined (SOPT_SIZE_CMSG_RECVIF_IPV4)
  67. #define SOPT_SIZE_CMSG_IFINDEX_IPV4() SOPT_SIZE_CMSG_RECVIF_IPV4()
  68. #else /* Nothing available */
  69. #define SOPT_SIZE_CMSG_IFINDEX_IPV4() (sizeof (char *))
  70. #endif /* SOPT_SIZE_CMSG_IFINDEX_IPV4 */
  71. #define SOPT_SIZE_CMSG_IFINDEX(af) \
  72. (((af) == AF_INET) : SOPT_SIZE_CMSG_IFINDEX_IPV4() \
  73. ? SOPT_SIZE_CMSG_PKTINFO_IPV6())
  74. extern int setsockopt_multicast_ipv4(int sock, int optname,
  75. struct in_addr if_addr
  76. /* required: interface to join on */,
  77. unsigned int mcast_addr,
  78. unsigned int ifindex
  79. /* optional: if non-zero, may be used
  80. instead of if_addr */);
  81. extern int setsockopt_ipv4_tos(int sock, int tos);
  82. /* Ask for, and get, ifindex, by whatever method is supported. */
  83. extern int setsockopt_ifindex (int, int, int);
  84. extern int getsockopt_ifindex (int, struct msghdr *);
  85. /* swab the fields in iph between the host order and system order expected
  86. * for IP_HDRINCL.
  87. */
  88. extern void sockopt_iphdrincl_swab_htosys (struct ip *iph);
  89. extern void sockopt_iphdrincl_swab_systoh (struct ip *iph);
  90. extern int sockopt_tcp_signature(int sock, union sockunion *su,
  91. const char *password);
  92. #endif /*_ZEBRA_SOCKOPT_H */