2 netutl.c -- some supporting network utility code
3 Copyright (C) 1998-2003 Ivo Timmermans <ivo@o2w.nl>
4 2000-2003 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 1.12.4.50 2003/07/29 22:59:00 guus Exp $
31 bool hostnames = false;
34 Turn a string into a struct addrinfo.
35 Return NULL on failure.
37 struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype)
40 struct addrinfo hint = {
41 .ai_family = addressfamily,
42 .ai_socktype = socktype,
48 err = getaddrinfo(address, service, &hint, &ai);
51 logger(LOG_WARNING, _("Error looking up %s port %s: %s\n"), address,
52 service, gai_strerror(err));
59 sockaddr_t str2sockaddr(const char *address, const char *port)
62 struct addrinfo hint = {
63 .ai_family = AF_UNSPEC,
64 .ai_flags = AI_NUMERICHOST,
65 .ai_socktype = SOCK_STREAM,
72 err = getaddrinfo(address, port, &hint, &ai);
75 logger(LOG_ERR, _("Error looking up %s port %s: %s\n"), address, port,
82 result = *(sockaddr_t *) ai->ai_addr;
88 void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr)
90 char address[NI_MAXHOST];
91 char port[NI_MAXSERV];
97 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
100 logger(LOG_ERR, _("Error while translating addresses: %s"),
107 scopeid = strchr(address, '%');
110 *scopeid = '\0'; /* Descope. */
112 *addrstr = xstrdup(address);
113 *portstr = xstrdup(port);
116 char *sockaddr2hostname(const sockaddr_t *sa)
119 char address[NI_MAXHOST] = "unknown";
120 char port[NI_MAXSERV] = "unknown";
125 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port),
126 hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
128 logger(LOG_ERR, _("Error while looking up hostname: %s"),
132 asprintf(&str, _("%s port %s"), address, port);
137 int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b)
143 result = a->sa.sa_family - b->sa.sa_family;
148 switch (a->sa.sa_family) {
153 result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
158 return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
161 result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
166 return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
169 logger(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"),
177 void sockaddrunmap(sockaddr_t *sa)
179 if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
180 sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
181 sa->in.sin_family = AF_INET;
185 /* Subnet mask handling */
187 int maskcmp(const void *va, const void *vb, int masklen, int len)
195 for(m = masklen, i = 0; m >= 8; m -= 8, i++) {
196 result = a[i] - b[i];
202 return (a[i] & (0x100 - (1 << (8 - m)))) -
203 (b[i] & (0x100 - (1 << (8 - m))));
208 void mask(void *va, int masklen, int len)
219 a[i++] &= (0x100 - (1 << masklen));
225 void maskcpy(void *va, const void *vb, int masklen, int len)
233 for(m = masklen, i = 0; m >= 8; m -= 8, i++)
237 a[i] = b[i] & (0x100 - (1 << m));
245 bool maskcheck(const void *va, int masklen, int len)
255 if(masklen && a[i++] & (0xff >> masklen))