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      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
     90