3 * http://ftp.uninett.no/pub/OpenBSD/src/kerberosV/src/lib/roken/getifaddrs.c
7 * Copyright (c) 2000 - 2001 Kungliga Tekniska H�gskolan
8 * (Royal Institute of Technology, Stockholm, Sweden).
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40 #include <sys/types.h>
41 #include <sys/socket.h>
45 #include <sys/ioctl.h>
48 #ifdef HAVE_SYS_SOCKIO_H
49 #include <sys/sockio.h>
52 #ifdef HAVE_NETINET_IN6_VAR_H
53 #include <netinet/in6_var.h>
57 #define max(a, b) ((a) > (b) ? (a) : (b))
60 #include "getifaddrs.h"
63 getifaddrs2(struct ifaddrs **ifap,
64 int af, int siocgifconf, int siocgifflags,
74 struct sockaddr sa_zero;
77 struct ifaddrs *start, **end = &start;
81 memset(&sa_zero, 0, sizeof(sa_zero));
82 fd = socket(af, SOCK_DGRAM, 0);
88 buf = calloc(1, buf_size);
93 ifconf.ifc_len = buf_size;
97 * Solaris returns EINVAL when the buffer is too small.
99 if (ioctl(fd, siocgifconf, &ifconf) < 0 && errno != EINVAL) {
104 * Can the difference between a full and a overfull buf
108 if (ifconf.ifc_len < (int)buf_size)
114 for (p = ifconf.ifc_buf; p < ifconf.ifc_buf + ifconf.ifc_len; p += sz) {
119 ifr = (struct ifreq *)p;
123 salen = sizeof(struct sockaddr);
124 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
126 sz = max(sz, sizeof(ifr->ifr_name) + sa->sa_len);
130 sz = max(sz, sizeof(ifr->ifr_name) + SA_LEN(sa));
132 memset(&ifreq, 0, sizeof(ifreq));
133 memcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name));
135 if (ioctl(fd, siocgifflags, &ifreq) < 0) {
140 *end = malloc(sizeof(**end));
142 (*end)->ifa_next = NULL;
143 (*end)->ifa_name = strdup(ifr->ifr_name);
144 (*end)->ifa_flags = ifreq.ifr_flags;
145 (*end)->ifa_addr = malloc(salen);
146 memcpy((*end)->ifa_addr, sa, salen);
147 (*end)->ifa_netmask = NULL;
150 /* fix these when we actually need them */
151 if (ifreq.ifr_flags & IFF_BROADCAST) {
152 (*end)->ifa_broadaddr =
153 malloc(sizeof(ifr->ifr_broadaddr));
154 memcpy((*end)->ifa_broadaddr, &ifr->ifr_broadaddr,
155 sizeof(ifr->ifr_broadaddr));
156 } else if (ifreq.ifr_flags & IFF_POINTOPOINT) {
157 (*end)->ifa_dstaddr = malloc(sizeof(ifr->ifr_dstaddr));
158 memcpy((*end)->ifa_dstaddr, &ifr->ifr_dstaddr,
159 sizeof(ifr->ifr_dstaddr));
161 (*end)->ifa_dstaddr = NULL;
163 (*end)->ifa_dstaddr = NULL;
165 (*end)->ifa_data = NULL;
167 end = &(*end)->ifa_next;
184 getifaddrs(struct ifaddrs **ifap)
188 #if defined(AF_INET6) && defined(SIOCGIF6CONF) && defined(SIOCGIF6FLAGS)
190 ret = getifaddrs2(ifap, AF_INET6, SIOCGIF6CONF, SIOCGIF6FLAGS,
191 sizeof(struct in6_ifreq));
193 #if defined(HAVE_IPV6) && defined(SIOCGIFCONF)
195 ret = getifaddrs2(ifap, AF_INET6, SIOCGIFCONF, SIOCGIFFLAGS,
196 sizeof(struct ifreq));
198 #if defined(AF_INET) && defined(SIOCGIFCONF) && defined(SIOCGIFFLAGS)
200 ret = getifaddrs2(ifap, AF_INET, SIOCGIFCONF, SIOCGIFFLAGS,
201 sizeof(struct ifreq));
207 freeifaddrs(struct ifaddrs *ifp)
209 struct ifaddrs *p, *q;
216 free(p->ifa_dstaddr);
218 free(p->ifa_netmask);
230 print_addr(const char *s, struct sockaddr *sa)
233 printf(" %s=%d/", s, sa->sa_family);
234 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
236 i < sa->sa_len - ((long)sa->sa_data - (long)&sa->sa_family); i++)
237 printf("%02x", ((unsigned char *)sa->sa_data)[i]);
239 for (i = 0; i < sizeof(sa->sa_data); i++)
240 printf("%02x", ((unsigned char *)sa->sa_data)[i]);
246 print_ifaddrs(struct ifaddrs *x)
250 for (p = x; p; p = p->ifa_next) {
251 printf("%s\n", p->ifa_name);
252 printf(" flags=%x\n", p->ifa_flags);
254 print_addr("addr", p->ifa_addr);
256 print_addr("dstaddr", p->ifa_dstaddr);
258 print_addr("netmask", p->ifa_netmask);
259 printf(" %p\n", p->ifa_data);
266 struct ifaddrs *a = NULL, *b;
267 getifaddrs2(&a, AF_INET, SIOCGIFCONF,
268 SIOCGIFFLAGS, sizeof(struct ifreq));