mDNSPosix/mDNSUNP.h

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2002-2004 Apple Computer, Inc. All rights reserved.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18 #ifndef __mDNSUNP_h
  19 #define __mDNSUNP_h
  20
  21 #include <sys/types.h>
  22 #include <sys/socket.h>
  23 #include <net/if.h>
  24 #include <netinet/in.h>
  25
  26 #ifdef HAVE_LINUX
  27 #include <linux/socket.h>
  28 #endif
  29
  30 #ifdef  __cplusplus
  31     extern "C" {
  32 #endif
  33
  34 #ifdef NOT_HAVE_SOCKLEN_T
  35     typedef unsigned int socklen_t;
  36 #endif
  37
  38 #if !defined(_SS_MAXSIZE)
  39 #if HAVE_IPV6
  40 #define sockaddr_storage sockaddr_in6
  41 #else
  42 #define sockaddr_storage sockaddr
  43 #endif // HAVE_IPV6
  44 #endif // !defined(_SS_MAXSIZE)
  45
  46 #ifndef NOT_HAVE_SA_LEN
  47 #define GET_SA_LEN(X) (sizeof(struct sockaddr) > ((struct sockaddr*)&(X))->sa_len ? \
  48                        sizeof(struct sockaddr) : ((struct sockaddr*)&(X))->sa_len   )
  49 #elif HAVE_IPV6
  50 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET  ? sizeof(struct sockaddr_in) : \
  51                        ((struct sockaddr*)&(X))->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr))
  52 #else
  53 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr))
  54 #endif
  55
  56 #define IFI_NAME    16          /* same as IFNAMSIZ in <net/if.h> */
  57 #define IFI_HADDR    8          /* allow for 64-bit EUI-64 in future */
  58
  59 // Renamed from my_in_pktinfo because in_pktinfo is used by Linux.
  60
  61 struct my_in_pktinfo {
  62     struct sockaddr_storage ipi_addr;
  63     int                     ipi_ifindex;            /* received interface index */
  64     char                    ipi_ifname[IFI_NAME];   /* received interface name  */
  65 };
  66
  67 /* From the text (Stevens, section 20.2): */
  68 /* 'As an example of recvmsg we will write a function named recvfrom_flags that */
  69 /* is similar to recvfrom but also returns: */
  70 /*      1. the returned msg_flags value, */
  71 /*      2. the destination addres of the received datagram (from the IP_RECVDSTADDR socket option, and */
  72 /*      3. the index of the interface on which the datagram was received (the IP_RECVIF socket option).' */
  73 extern ssize_t recvfrom_flags(int fd, void *ptr, size_t nbytes, int *flagsp,
  74                struct sockaddr *sa, socklen_t *salenptr, struct my_in_pktinfo *pktp, u_char *ttl);
  75
  76 struct ifi_info {
  77   char    ifi_name[IFI_NAME];   /* interface name, null terminated */
  78   u_char  ifi_haddr[IFI_HADDR]; /* hardware address */
  79   u_short ifi_hlen;             /* #bytes in hardware address: 0, 6, 8 */
  80   short   ifi_flags;            /* IFF_xxx constants from <net/if.h> */
  81   short   ifi_myflags;          /* our own IFI_xxx flags */
  82   int     ifi_index;            /* interface index */
  83   struct sockaddr  *ifi_addr;   /* primary address */
  84   struct sockaddr  *ifi_netmask;
  85   struct sockaddr  *ifi_brdaddr;/* broadcast address */
  86   struct sockaddr  *ifi_dstaddr;/* destination address */
  87   struct ifi_info  *ifi_next;   /* next of these structures */
  88 };
  89
  90 #if defined(AF_INET6) && HAVE_IPV6 && HAVE_LINUX
  91 #define PROC_IFINET6_PATH "/proc/net/if_inet6"
  92 extern struct ifi_info  *get_ifi_info_linuxv6(int family, int doaliases);
  93 #endif
  94
  95 #if defined(AF_INET6) && HAVE_IPV6
  96 #define INET6_ADDRSTRLEN 46 /*Maximum length of IPv6 address */
  97 #endif
  98
  99
 100
 101 #define IFI_ALIAS   1           /* ifi_addr is an alias */
 102
 103 /* From the text (Stevens, section 16.6): */
 104 /* 'Since many programs need to know all the interfaces on a system, we will develop a */
 105 /* function of our own named get_ifi_info that returns a linked list of structures, one */
 106 /* for each interface that is currently "up."' */
 107 extern struct ifi_info  *get_ifi_info(int family, int doaliases);
 108
 109 /* 'The free_ifi_info function, which takes a pointer that was */
 110 /* returned by get_ifi_info and frees all the dynamic memory.' */
 111 extern void             free_ifi_info(struct ifi_info *);
 112
 113 #ifdef NOT_HAVE_DAEMON
 114 extern int daemon(int nochdir, int noclose);
 115 #endif
 116
 117 #ifdef  __cplusplus
 118     }
 119 #endif
 120
 121 #endif