2 netutl.c -- some supporting network utility code
3 Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>
4 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 $Id: netutl.c,v 1.12.4.44 2002/09/09 22:32:44 guus Exp $
27 #include <netinet/in.h>
30 #ifdef HAVE_INTTYPES_H
35 #include <sys/socket.h>
37 #include <arpa/inet.h>
52 Turn a string into a struct addrinfo.
53 Return NULL on failure.
55 struct addrinfo *str2addrinfo(char *address, char *service, int socktype)
57 struct addrinfo hint, *ai;
62 memset(&hint, 0, sizeof(hint));
64 hint.ai_family = addressfamily;
65 hint.ai_socktype = socktype;
67 err = getaddrinfo(address, service, &hint, &ai);
70 if(debug_lvl >= DEBUG_ERROR)
71 syslog(LOG_WARNING, _("Error looking up %s port %s: %s\n"), address,
72 service, gai_strerror(err));
80 sockaddr_t str2sockaddr(char *address, char *port)
82 struct addrinfo hint, *ai;
88 memset(&hint, 0, sizeof(hint));
90 hint.ai_family = AF_UNSPEC;
91 hint.ai_flags = AI_NUMERICHOST;
92 hint.ai_socktype = SOCK_STREAM;
94 err = getaddrinfo(address, port, &hint, &ai);
97 syslog(LOG_ERR, _("Error looking up %s port %s: %s\n"), address, port,
104 result = *(sockaddr_t *) ai->ai_addr;
110 void sockaddr2str(sockaddr_t *sa, char **addrstr, char **portstr)
112 char address[NI_MAXHOST];
113 char port[NI_MAXSERV];
119 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
122 syslog(LOG_ERR, _("Error while translating addresses: %s"),
129 scopeid = strchr(address, '%');
132 *scopeid = '\0'; /* Descope. */
134 *addrstr = xstrdup(address);
135 *portstr = xstrdup(port);
138 char *sockaddr2hostname(sockaddr_t *sa)
141 char address[NI_MAXHOST] = "unknown";
142 char port[NI_MAXSERV] = "unknown";
147 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port),
148 hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
150 syslog(LOG_ERR, _("Error while looking up hostname: %s"),
154 asprintf(&str, _("%s port %s"), address, port);
159 int sockaddrcmp(sockaddr_t *a, sockaddr_t *b)
165 result = a->sa.sa_family - b->sa.sa_family;
170 switch (a->sa.sa_family) {
175 result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
180 return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
183 result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
188 return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
191 syslog(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"),
199 void sockaddrunmap(sockaddr_t *sa)
201 if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
202 sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
203 sa->in.sin_family = AF_INET;
207 /* Subnet mask handling */
209 int maskcmp(void *va, void *vb, int masklen, int len)
217 for(m = masklen, i = 0; m >= 8; m -= 8, i++) {
218 result = a[i] - b[i];
224 return (a[i] & (0x100 - (1 << (8 - m)))) -
225 (b[i] & (0x100 - (1 << (8 - m))));
230 void mask(void *va, int masklen, int len)
241 a[i++] &= (0x100 - (1 << masklen));
247 void maskcpy(void *va, void *vb, int masklen, int len)
255 for(m = masklen, i = 0; m >= 8; m -= 8, i++)
259 a[i] = b[i] & (0x100 - (1 << m));
267 int maskcheck(void *va, int masklen, int len)
277 if(masklen && a[i++] & (0xff >> masklen))