1 /*** 2 This file is part of avahi. 3 4 avahi is free software; you can redistribute it and/or modify it 5 under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 2.1 of the 7 License, or (at your option) any later version. 8 9 avahi is distributed in the hope that it will be useful, but WITHOUT 10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 11 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General 12 Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with avahi; if not, write to the Free Software 16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 17 USA. 18 ***/ 19 20 #ifdef HAVE_CONFIG_H 21 #include <config.h> 22 #endif 23 24 #include <sys/types.h> 25 #include <netinet/in.h> 26 #include <sys/socket.h> 27 #include <arpa/inet.h> 28 #include <string.h> 29 #include <assert.h> 30 #include <stdio.h> 31 32 #include "address.h" 33 #include "avahi-malloc.h" 34 35 static size_t address_get_size(const AvahiAddress *a) { 36 assert(a); 37 38 if (a->proto == AVAHI_PROTO_INET) 39 return 4; 40 else if (a->proto == AVAHI_PROTO_INET6) 41 return 16; 42 43 return 0; 44 } 45 46 int avahi_address_cmp(const AvahiAddress *a, const AvahiAddress *b) { 47 assert(a); 48 assert(b); 49 50 if (a->proto != b->proto) 51 return -1; 52 53 return memcmp(a->data.data, b->data.data, address_get_size(a)); 54 } 55 56 char *avahi_address_snprint(char *s, size_t length, const AvahiAddress *a) { 57 assert(s); 58 assert(length); 59 assert(a); 60 61 if (!(inet_ntop(avahi_proto_to_af(a->proto), a->data.data, s, length))) 62 return NULL; 63 64 return s; 65 } 66 67 char* avahi_reverse_lookup_name(const AvahiAddress *a, char *ret_s, size_t length) { 68 assert(ret_s); 69 assert(length > 0); 70 assert(a); 71 72 if (a->proto == AVAHI_PROTO_INET) { 73 uint32_t n = ntohl(a->data.ipv4.address); 74 snprintf( 75 ret_s, length, 76 "%u.%u.%u.%u.in-addr.arpa", 77 n & 0xFF, (n >> 8) & 0xFF, (n >> 16) & 0xFF, n >> 24); 78 } else { 79 assert(a->proto == AVAHI_PROTO_INET6); 80 81 snprintf( 82 ret_s, length, 83 "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.ip6.arpa", 84 a->data.ipv6.address[15] & 0xF, a->data.ipv6.address[15] >> 4, 85 a->data.ipv6.address[14] & 0xF, a->data.ipv6.address[14] >> 4, 86 a->data.ipv6.address[13] & 0xF, a->data.ipv6.address[13] >> 4, 87 a->data.ipv6.address[12] & 0xF, a->data.ipv6.address[12] >> 4, 88 a->data.ipv6.address[11] & 0xF, a->data.ipv6.address[11] >> 4, 89 a->data.ipv6.address[10] & 0xF, a->data.ipv6.address[10] >> 4, 90 a->data.ipv6.address[ 9] & 0xF, a->data.ipv6.address[ 9] >> 4, 91 a->data.ipv6.address[ 8] & 0xF, a->data.ipv6.address[ 8] >> 4, 92 a->data.ipv6.address[ 7] & 0xF, a->data.ipv6.address[ 7] >> 4, 93 a->data.ipv6.address[ 6] & 0xF, a->data.ipv6.address[ 6] >> 4, 94 a->data.ipv6.address[ 5] & 0xF, a->data.ipv6.address[ 5] >> 4, 95 a->data.ipv6.address[ 4] & 0xF, a->data.ipv6.address[ 4] >> 4, 96 a->data.ipv6.address[ 3] & 0xF, a->data.ipv6.address[ 3] >> 4, 97 a->data.ipv6.address[ 2] & 0xF, a->data.ipv6.address[ 2] >> 4, 98 a->data.ipv6.address[ 1] & 0xF, a->data.ipv6.address[ 1] >> 4, 99 a->data.ipv6.address[ 0] & 0xF, a->data.ipv6.address[ 0] >> 4); 100 } 101 102 return ret_s; 103 } 104 105 AvahiAddress *avahi_address_parse(const char *s, AvahiProtocol proto, AvahiAddress *ret_addr) { 106 assert(ret_addr); 107 assert(s); 108 109 if (proto == AVAHI_PROTO_UNSPEC) { 110 if (inet_pton(AF_INET, s, ret_addr->data.data) <= 0) { 111 if (inet_pton(AF_INET6, s, ret_addr->data.data) <= 0) 112 return NULL; 113 else 114 ret_addr->proto = AVAHI_PROTO_INET6; 115 } else 116 ret_addr->proto = AVAHI_PROTO_INET; 117 } else { 118 if (inet_pton(avahi_proto_to_af(proto), s, ret_addr->data.data) <= 0) 119 return NULL; 120 121 ret_addr->proto = proto; 122 } 123 124 return ret_addr; 125 } 126 127 int avahi_proto_to_af(AvahiProtocol proto) { 128 if (proto == AVAHI_PROTO_INET) 129 return AF_INET; 130 if (proto == AVAHI_PROTO_INET6) 131 return AF_INET6; 132 133 assert(proto == AVAHI_PROTO_UNSPEC); 134 return AF_UNSPEC; 135 } 136 137 AvahiProtocol avahi_af_to_proto(int af) { 138 if (af == AF_INET) 139 return AVAHI_PROTO_INET; 140 if (af == AF_INET6) 141 return AVAHI_PROTO_INET6; 142 143 assert(af == AF_UNSPEC); 144 return AVAHI_PROTO_UNSPEC; 145 } 146 147 const char* avahi_proto_to_string(AvahiProtocol proto) { 148 if (proto == AVAHI_PROTO_INET) 149 return "IPv4"; 150 if (proto == AVAHI_PROTO_INET6) 151 return "IPv6"; 152 153 assert(proto == AVAHI_PROTO_UNSPEC); 154 return "UNSPEC"; 155 } 156
