| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2004 Richard Kettlewell |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 18 | * USA |
| 19 | */ |
| 20 | |
| 21 | #include <config.h> |
| 22 | #include "types.h" |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <sys/socket.h> |
| 28 | #include <netinet/in.h> |
| 29 | #include <netdb.h> |
| 30 | |
| 31 | #include "log.h" |
| 32 | #include "printf.h" |
| 33 | #include "configuration.h" |
| 34 | #include "addr.h" |
| 35 | |
| 36 | struct addrinfo *get_address(const struct stringlist *a, |
| 37 | const struct addrinfo *pref, |
| 38 | char **namep) { |
| 39 | struct addrinfo *res; |
| 40 | char *name; |
| 41 | int rc; |
| 42 | |
| 43 | if(a->n == 1) { |
| 44 | byte_xasprintf(&name, "host * service %s", a->s[0]); |
| 45 | if((rc = getaddrinfo(0, a->s[0], pref, &res))) { |
| 46 | error(0, "getaddrinfo %s: %s", a->s[0], gai_strerror(rc)); |
| 47 | return 0; |
| 48 | } |
| 49 | } else { |
| 50 | byte_xasprintf(&name, "host %s service %s", a->s[0], a->s[1]); |
| 51 | if((rc = getaddrinfo(a->s[0], a->s[1], pref, &res))) { |
| 52 | error(0, "getaddrinfo %s %s: %s", a->s[0], a->s[1], gai_strerror(rc)); |
| 53 | return 0; |
| 54 | } |
| 55 | } |
| 56 | if(!res || res->ai_socktype != SOCK_STREAM) { |
| 57 | error(0, "getaddrinfo didn't give us a stream socket"); |
| 58 | if(res) |
| 59 | freeaddrinfo(res); |
| 60 | return 0; |
| 61 | } |
| 62 | if(namep) |
| 63 | *namep = name; |
| 64 | return res; |
| 65 | } |
| 66 | |
| 67 | int addrinfocmp(const struct addrinfo *a, |
| 68 | const struct addrinfo *b) { |
| 69 | const struct sockaddr_in *ina, *inb; |
| 70 | const struct sockaddr_in6 *in6a, *in6b; |
| 71 | |
| 72 | if(a->ai_family != b->ai_family) return a->ai_family - b->ai_family; |
| 73 | if(a->ai_socktype != b->ai_socktype) return a->ai_socktype - b->ai_socktype; |
| 74 | if(a->ai_protocol != b->ai_protocol) return a->ai_protocol - b->ai_protocol; |
| 75 | switch(a->ai_protocol) { |
| 76 | case PF_INET: |
| 77 | ina = (const struct sockaddr_in *)a->ai_addr; |
| 78 | inb = (const struct sockaddr_in *)b->ai_addr; |
| 79 | if(ina->sin_port != inb->sin_port) return ina->sin_port - inb->sin_port; |
| 80 | return ina->sin_addr.s_addr - inb->sin_addr.s_addr; |
| 81 | break; |
| 82 | case PF_INET6: |
| 83 | in6a = (const struct sockaddr_in6 *)a->ai_addr; |
| 84 | in6b = (const struct sockaddr_in6 *)b->ai_addr; |
| 85 | if(in6a->sin6_port != in6b->sin6_port) |
| 86 | return in6a->sin6_port - in6b->sin6_port; |
| 87 | return memcmp(&in6a->sin6_addr, &in6b->sin6_addr, |
| 88 | sizeof (struct in6_addr)); |
| 89 | default: |
| 90 | error(0, "unsupported protocol family %d", a->ai_protocol); |
| 91 | return memcmp(a->ai_addr, b->ai_addr, a->ai_addrlen); /* kludge */ |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /* |
| 96 | Local Variables: |
| 97 | c-basic-offset:2 |
| 98 | comment-column:40 |
| 99 | End: |
| 100 | */ |