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 #if !defined(_SS_MAXSIZE) 48 #if HAVE_IPV6 49 #define sockaddr_storage sockaddr_in6 50 #else 51 #define sockaddr_storage sockaddr 52 #endif // HAVE_IPV6 53 #endif // !defined(_SS_MAXSIZE) 54 55 #ifndef NOT_HAVE_SA_LEN 56 #define GET_SA_LEN(X) (sizeof(struct sockaddr) > ((struct sockaddr*)&(X))->sa_len ? \ 57 sizeof(struct sockaddr) : ((struct sockaddr*)&(X))->sa_len ) 58 #elif HAVE_IPV6 59 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : \ 60 ((struct sockaddr*)&(X))->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr)) 61 #else 62 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr)) 63 #endif 64 65 #define IFI_NAME IFNAMSIZ /* same as IFNAMSIZ in <net/if.h> */ 66 #define IFI_HADDR 8 /* allow for 64-bit EUI-64 in future */ 67 68 // Renamed from my_in_pktinfo because in_pktinfo is used by Linux. 69 70 struct my_in_pktinfo { 71 struct sockaddr_storage ipi_addr; 72 int ipi_ifindex; /* received interface index */ 73 char ipi_ifname[IFI_NAME]; /* received interface name */ 74 }; 75 76 /* From the text (Stevens, section 20.2): */ 77 /* 'As an example of recvmsg we will write a function named recvfrom_flags that */ 78 /* is similar to recvfrom but also returns: */ 79 /* 1. the returned msg_flags value, */ 80 /* 2. the destination addres of the received datagram (from the IP_RECVDSTADDR socket option, and */ 81 /* 3. the index of the interface on which the datagram was received (the IP_RECVIF socket option).' */ 82 extern ssize_t recvfrom_flags(int fd, void *ptr, size_t nbytes, int *flagsp, 83 struct sockaddr *sa, socklen_t *salenptr, struct my_in_pktinfo *pktp, u_char *ttl); 84 85 struct ifi_info { 86 char ifi_name[IFI_NAME]; /* interface name, null terminated */ 87 u_char ifi_haddr[IFI_HADDR]; /* hardware address */ 88 u_short ifi_hlen; /* #bytes in hardware address: 0, 6, 8 */ 89 short ifi_flags; /* IFF_xxx constants from <net/if.h> */ 90 short ifi_myflags; /* our own IFI_xxx flags */ 91 int ifi_index; /* interface index */ 92 struct sockaddr *ifi_addr; /* primary address */ 93 struct sockaddr *ifi_netmask; 94 struct sockaddr *ifi_brdaddr; /* broadcast address */ 95 struct sockaddr *ifi_dstaddr; /* destination address */ 96 struct ifi_info *ifi_next; /* next of these structures */ 97 }; 98 99 #if defined(AF_INET6) && HAVE_IPV6 && HAVE_LINUX 100 #define PROC_IFINET6_PATH "/proc/net/if_inet6" 101 extern struct ifi_info *get_ifi_info_linuxv6(int doaliases); 102 #endif 103 104 #if defined(AF_INET6) && HAVE_IPV6 105 #define INET6_ADDRSTRLEN 46 /*Maximum length of IPv6 address */ 106 #endif 107 108 109 110 #define IFI_ALIAS 1 /* ifi_addr is an alias */ 111 112 /* From the text (Stevens, section 16.6): */ 113 /* 'Since many programs need to know all the interfaces on a system, we will develop a */ 114 /* function of our own named get_ifi_info that returns a linked list of structures, one */ 115 /* for each interface that is currently "up."' */ 116 extern struct ifi_info *get_ifi_info(int family, int doaliases); 117 118 /* 'The free_ifi_info function, which takes a pointer that was */ 119 /* returned by get_ifi_info and frees all the dynamic memory.' */ 120 extern void free_ifi_info(struct ifi_info *); 121 122 #ifdef NOT_HAVE_DAEMON 123 extern int daemon(int nochdir, int noclose); 124 #endif 125 126 #ifdef __cplusplus 127 } 128 #endif 129 130 #endif 131