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 1.12.4.42 2002/09/09 19:39:59 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;
60 memset(&hint, 0, sizeof(hint));
62 hint.ai_family = addressfamily;
63 hint.ai_socktype = socktype;
65 err = getaddrinfo(address, service, &hint, &ai);
69 if(debug_lvl >= DEBUG_ERROR)
70 syslog(LOG_WARNING, _("Error looking up %s port %s: %s\n"), address, service, gai_strerror(err));
79 sockaddr_t str2sockaddr(char *address, char *port)
81 struct addrinfo hint, *ai;
85 memset(&hint, 0, sizeof(hint));
87 hint.ai_family = AF_UNSPEC;
88 hint.ai_flags = AI_NUMERICHOST;
89 hint.ai_socktype = SOCK_STREAM;
91 err = getaddrinfo(address, port, &hint, &ai);
95 syslog(LOG_ERR, _("Error looking up %s port %s: %s\n"), address, port, gai_strerror(err));
101 result = *(sockaddr_t *)ai->ai_addr;
107 void sockaddr2str(sockaddr_t *sa, char **addrstr, char **portstr)
109 char address[NI_MAXHOST];
110 char port[NI_MAXSERV];
114 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST|NI_NUMERICSERV);
118 syslog(LOG_ERR, _("Error while translating addresses: %s"), gai_strerror(err));
124 scopeid = strchr(address, '%');
127 *scopeid = '\0'; /* Descope. */
129 *addrstr = xstrdup(address);
130 *portstr = xstrdup(port);
134 char *sockaddr2hostname(sockaddr_t *sa)
137 char address[NI_MAXHOST] = "unknown";
138 char port[NI_MAXSERV] = "unknown";
141 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), hostnames?0:(NI_NUMERICHOST|NI_NUMERICSERV));
144 syslog(LOG_ERR, _("Error while looking up hostname: %s"), gai_strerror(err));
147 asprintf(&str, _("%s port %s"), address, port);
152 int sockaddrcmp(sockaddr_t *a, sockaddr_t *b)
156 result = a->sa.sa_family - b->sa.sa_family;
161 switch(a->sa.sa_family)
166 result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
169 return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
171 result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
174 return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
176 syslog(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"), a->sa.sa_family);
184 void sockaddrunmap(sockaddr_t *sa)
186 if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr))
188 sa->in.sin_addr.s_addr = ((uint32_t *)&sa->in6.sin6_addr)[3];
189 sa->in.sin_family = AF_INET;
193 /* Subnet mask handling */
195 int maskcmp(void *va, void *vb, int masklen, int len)
201 for(m = masklen, i = 0; m >= 8; m -= 8, i++)
203 result = a[i] - b[i];
209 return (a[i] & (0x100 - (1 << (8 - m)))) - (b[i] & (0x100 - (1 << (8 - m))));
214 void mask(void *va, int masklen, int len)
223 a[i++] &= (0x100 - (1 << masklen));
229 void maskcpy(void *va, void *vb, int masklen, int len)
235 for(m = masklen, i = 0; m >= 8; m -= 8, i++)
240 a[i] = b[i] & (0x100 - (1 << m));
248 int maskcheck(void *va, int masklen, int len)
256 if(masklen && a[i++] & (0xff >> masklen))