2 netutl.c -- some supporting network utility code
3 Copyright (C) 1998-2002 Ivo Timmermans <itimmermans@bigfoot.com>
4 2000-2002 Guus Sliepen <guus@sliepen.warande.net>
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 1.1 2002/04/28 12:46:26 zarq Exp $
27 #include <netinet/in.h>
32 #include <sys/socket.h>
33 #include <arpa/inet.h>
39 #include "interface.h"
50 Turn a string into a struct addrinfo.
51 Return NULL on failure.
53 struct addrinfo *str2addrinfo(char *address, char *service, int socktype)
55 struct addrinfo hint, *ai;
58 memset(&hint, 0, sizeof(hint));
60 hint.ai_family = addressfamily;
61 hint.ai_socktype = socktype;
63 if((err = getaddrinfo(address, service, &hint, &ai)))
65 log(DEBUG_ERROR, LOG_WARNING,
66 _("Error looking up %s port %s: %s\n"),
67 address, service, gai_strerror(err));
76 sockaddr_t str2sockaddr(char *address, char *port)
78 struct addrinfo hint, *ai;
82 memset(&hint, 0, sizeof(hint));
84 hint.ai_family = AF_UNSPEC;
85 hint.ai_flags = AI_NUMERICHOST;
86 hint.ai_socktype = SOCK_STREAM;
88 if((err = getaddrinfo(address, port, &hint, &ai) || !ai))
91 _("Error looking up %s port %s: %s\n"),
92 address, port, gai_strerror(err));
98 result = *(sockaddr_t *)ai->ai_addr;
104 void sockaddr2str(sockaddr_t *sa, char **addrstr, char **portstr)
106 char address[NI_MAXHOST];
107 char port[NI_MAXSERV];
111 if((err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST|NI_NUMERICSERV)))
113 syslog(LOG_ERR, _("Error while translating addresses: %s"), gai_strerror(err));
120 if((scopeid = strchr(address, '%')))
121 *scopeid = '\0'; /* Descope. */
124 *addrstr = xstrdup(address);
125 *portstr = xstrdup(port);
129 char *sockaddr2hostname(sockaddr_t *sa)
132 char address[NI_MAXHOST] = "unknown";
133 char port[NI_MAXSERV] = "unknown";
136 if((err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), hostnames?0:(NI_NUMERICHOST|NI_NUMERICSERV))))
138 syslog(LOG_ERR, _("Error while looking up hostname: %s"), gai_strerror(err));
141 asprintf(&str, _("%s port %s"), address, port);
146 int sockaddrcmp(sockaddr_t *a, sockaddr_t *b)
150 result = a->sa.sa_family - b->sa.sa_family;
155 switch(a->sa.sa_family)
160 result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
163 return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
165 result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
168 return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
170 syslog(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"), a->sa.sa_family);
178 void sockaddrunmap(sockaddr_t *sa)
180 if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr))
182 sa->in.sin_addr.s_addr = ((uint32_t *)&sa->in6.sin6_addr)[3];
183 sa->in.sin_family = AF_INET;
187 /* Subnet mask handling */
189 int maskcmp(char *a, char *b, int masklen, int len)
193 for(m = masklen, i = 0; m >= 8; m -= 8, i++)
194 if((result = a[i] - b[i]))
198 return (a[i] & (0x100 - (m << 1))) - (b[i] & (0x100 - (m << 1)));
203 void mask(char *a, int masklen, int len)
211 a[i++] &= (0x100 - (masklen << 1));
217 void maskcpy(char *a, char *b, int masklen, int len)
221 for(m = masklen, i = 0; m >= 8; m -= 8, i++)
226 a[i] = b[i] & (0x100 - (m << 1));
234 int maskcheck(char *a, int masklen, int len)
242 if(a[i++] & ~(0x100 - (masklen << 1)))