HCoop / ntk / apt.git / blame
| Commit | Line | Data |
|---|---|---|
| 934b6582 AL |
1 | // -*- mode: cpp; mode: fold -*- |
| 2 | // Description /*{{{*/ | |
| 3 | // $Id: rfc2553emu.cc,v 1.1 1999/05/25 05:56:24 jgg Exp $ | |
| 4 | /* ###################################################################### | |
| 5 | ||
| 6 | RFC 2553 Emulation - Provides emulation for RFC 2553 getaddrinfo, | |
| 7 | freeaddrinfo and getnameinfo | |
| 8 | ||
| 9 | Originally written by Jason Gunthorpe <jgg@debian.org> and placed into | |
| 10 | the Public Domain, do with it what you will. | |
| 11 | ||
| 12 | ##################################################################### */ | |
| 13 | /*}}}*/ | |
| 14 | #include "rfc2553emu.h" | |
| 15 | #include <stdlib.h> | |
| 16 | #include <arpa/inet.h> | |
| 17 | #include <iostream.h> | |
| 18 | ||
| 19 | #ifndef HAVE_GETADDRINFO | |
| 20 | int getaddrinfo(const char *nodename, const char *servname, | |
| 21 | const struct addrinfo *hints, | |
| 22 | struct addrinfo **res) | |
| 23 | { | |
| 24 | struct addrinfo **Result; | |
| 25 | hostent *Addr; | |
| 26 | unsigned int Port; | |
| 27 | int Proto; | |
| 28 | const char *End; | |
| 29 | char **CurAddr; | |
| 30 | ||
| 31 | Addr = gethostbyname(nodename); | |
| 32 | if (Addr == 0) | |
| 33 | { | |
| 34 | if (h_errno == TRY_AGAIN) | |
| 35 | return EAI_AGAIN; | |
| 36 | if (h_errno == NO_RECOVERY) | |
| 37 | return EAI_FAIL; | |
| 38 | return EAI_NONAME; | |
| 39 | } | |
| 40 | ||
| 41 | // No A records | |
| 42 | if (Addr->h_addr_list[0] == 0) | |
| 43 | return EAI_NONAME; | |
| 44 | ||
| 45 | // Try to convert the service as a number | |
| 46 | Port = htons(strtol(servname,(char **)&End,0)); | |
| 47 | Proto = SOCK_STREAM; | |
| 48 | ||
| 49 | if (hints != 0 && hints->ai_socktype != 0) | |
| 50 | Proto = hints->ai_socktype; | |
| 51 | ||
| 52 | // Not a number, must be a name. | |
| 53 | if (End != servname + strlen(End)) | |
| 54 | { | |
| 55 | struct servent *Srv = 0; | |
| 56 | ||
| 57 | // Do a lookup in the service database | |
| 58 | if (hints == 0 || hints->ai_socktype == SOCK_STREAM) | |
| 59 | Srv = getservbyname(servname,"tcp"); | |
| 60 | if (hints != 0 && hints->ai_socktype == SOCK_DGRAM) | |
| 61 | Srv = getservbyname(servname,"udp"); | |
| 62 | if (Srv == 0) | |
| 63 | return EAI_NONAME; | |
| 64 | ||
| 65 | // Get the right protocol | |
| 66 | Port = Srv->s_port; | |
| 67 | if (strcmp(Srv->s_proto,"tcp") == 0) | |
| 68 | Proto = SOCK_STREAM; | |
| 69 | else | |
| 70 | { | |
| 71 | if (strcmp(Srv->s_proto,"udp") == 0) | |
| 72 | Proto = SOCK_DGRAM; | |
| 73 | else | |
| 74 | return EAI_NONAME; | |
| 75 | } | |
| 76 | ||
| 77 | if (hints != 0 && hints->ai_socktype != Proto && | |
| 78 | hints->ai_socktype != 0) | |
| 79 | return EAI_SERVICE; | |
| 80 | } | |
| 81 | ||
| 82 | // Start constructing the linked list | |
| 83 | *res = 0; | |
| 84 | for (CurAddr = Addr->h_addr_list; *CurAddr != 0; CurAddr++) | |
| 85 | { | |
| 86 | // New result structure | |
| 87 | *Result = (struct addrinfo *)calloc(sizeof(**Result),1); | |
| 88 | if (*Result == 0) | |
| 89 | { | |
| 90 | freeaddrinfo(*res); | |
| 91 | return EAI_MEMORY; | |
| 92 | } | |
| 93 | if (*res == 0) | |
| 94 | *res = *Result; | |
| 95 | ||
| 96 | (*Result)->ai_family = AF_INET; | |
| 97 | (*Result)->ai_socktype = Proto; | |
| 98 | ||
| 99 | // If we have the IPPROTO defines we can set the protocol field | |
| 100 | #ifdef IPPROTO_TCP | |
| 101 | if (Proto == SOCK_STREAM) | |
| 102 | (*Result)->ai_protocol = IPPROTO_TCP; | |
| 103 | if (Proto == SOCK_DGRAM) | |
| 104 | (*Result)->ai_protocol = IPPROTO_UDP; | |
| 105 | #endif | |
| 106 | ||
| 107 | // Allocate space for the address | |
| 108 | (*Result)->ai_addrlen = sizeof(struct sockaddr_in); | |
| 109 | (*Result)->ai_addr = (struct sockaddr *)calloc(sizeof(sockaddr_in),1); | |
| 110 | if ((*Result)->ai_addr == 0) | |
| 111 | { | |
| 112 | freeaddrinfo(*res); | |
| 113 | return EAI_MEMORY; | |
| 114 | } | |
| 115 | ||
| 116 | // Set the address | |
| 117 | ((struct sockaddr_in *)(*Result)->ai_addr)->sin_family = AF_INET; | |
| 118 | ((struct sockaddr_in *)(*Result)->ai_addr)->sin_port = Port; | |
| 119 | ((struct sockaddr_in *)(*Result)->ai_addr)->sin_addr = *(in_addr *)(*CurAddr); | |
| 120 | ||
| 121 | Result = &(*Result)->ai_next; | |
| 122 | } | |
| 123 | ||
| 124 | return 0; | |
| 125 | } | |
| 126 | ||
| 127 | void freeaddrinfo(struct addrinfo *ai) | |
| 128 | { | |
| 129 | struct addrinfo *Tmp; | |
| 130 | while (ai != 0) | |
| 131 | { | |
| 132 | free(ai->ai_addr); | |
| 133 | Tmp = ai; | |
| 134 | ai = ai->ai_next; | |
| 135 | free(ai); | |
| 136 | } | |
| 137 | } | |
| 138 | ||
| 139 | #endif // HAVE_GETADDRINFO |