mDNSPosix/mDNSUNP.h

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2002-2018 Apple 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 #define IPV6_2292_PKTINFO  IPV6_2292PKTINFO
  29 #define IPV6_2292_HOPLIMIT IPV6_2292HOPLIMIT
  30 #else
  31 // The following are the supported non-linux posix OSes -
  32 // netbsd, freebsd and openbsd.
  33 #if HAVE_IPV6
  34 #define IPV6_2292_PKTINFO  19
  35 #define IPV6_2292_HOPLIMIT 20
  36 #endif
  37 #endif
  38
  39 #ifdef  __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 #ifdef NOT_HAVE_SOCKLEN_T
  44 typedef unsigned int socklen_t;
  45 #endif
  46
  47 #ifndef NOT_HAVE_SA_LEN
  48 #define GET_SA_LEN(X) (sizeof(struct sockaddr) > ((struct sockaddr*)&(X))->sa_len ? \
  49                        sizeof(struct sockaddr) : ((struct sockaddr*)&(X))->sa_len   )
  50 #elif HAVE_IPV6
  51 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET  ? sizeof(struct sockaddr_in) : \
  52                        ((struct sockaddr*)&(X))->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr))
  53 #else
  54 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr))
  55 #endif
  56
  57 #define IFI_NAME    IFNAMSIZ    /* same as IFNAMSIZ in <net/if.h> */
  58 #define IFI_HADDR   8           /* allow for 64-bit EUI-64 in future */
  59
  60 // Renamed from my_in_pktinfo because in_pktinfo is used by Linux.
  61
  62 struct my_in_pktinfo {
  63     struct sockaddr_storage ipi_addr;
  64     int ipi_ifindex;                                /* received interface index */
  65     char ipi_ifname[IFI_NAME];                      /* received interface name  */
  66 };
  67
  68 /* From the text (Stevens, section 20.2): */
  69 /* 'As an example of recvmsg we will write a function named recvfrom_flags that */
  70 /* is similar to recvfrom but also returns: */
  71 /*      1. the returned msg_flags value, */
  72 /*      2. the destination addres of the received datagram (from the IP_RECVDSTADDR socket option, and */
  73 /*      3. the index of the interface on which the datagram was received (the IP_RECVIF socket option).' */
  74 extern ssize_t recvfrom_flags(int fd, void *ptr, size_t nbytes, int *flagsp,
  75                               struct sockaddr *sa, socklen_t *salenptr, struct my_in_pktinfo *pktp, u_char *ttl);
  76
  77 #if defined(AF_INET6) && HAVE_IPV6
  78 #define INET6_ADDRSTRLEN 46 /*Maximum length of IPv6 address */
  79 #endif
  80
  81 #ifdef NOT_HAVE_DAEMON
  82 extern int daemon(int nochdir, int noclose);
  83 #endif
  84
  85 #ifdef  __cplusplus
  86 }
  87 #endif
  88
  89 #endif