| /* |
| * downloaded from |
| * http://ftp.uninett.no/pub/OpenBSD/src/kerberosV/src/lib/roken/getifaddrs.c |
| */ |
| #if !LWS_HAVE_GETIFADDRS |
| /* |
| * Copyright (c) 2000 - 2001 Kungliga Tekniska H�gskolan |
| * (Royal Institute of Technology, Stockholm, Sweden). |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * 3. Neither the name of the Institute nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <errno.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <net/if.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <unistd.h> |
| #include "private-libwebsockets.h" |
| |
| #ifdef LWS_HAVE_SYS_SOCKIO_H |
| #include <sys/sockio.h> |
| #endif |
| |
| #ifdef LWS_HAVE_NETINET_IN6_VAR_H |
| #include <netinet/in6_var.h> |
| #endif |
| |
| #ifndef max |
| #define max(a, b) ((a) > (b) ? (a) : (b)) |
| #endif |
| |
| #include "getifaddrs.h" |
| |
| static int |
| getifaddrs2(struct ifaddrs **ifap, |
| int af, int siocgifconf, int siocgifflags, |
| size_t ifreq_sz) |
| { |
| int ret; |
| int fd; |
| size_t buf_size; |
| char *buf; |
| struct ifconf ifconf; |
| char *p; |
| size_t sz; |
| struct sockaddr sa_zero; |
| struct ifreq *ifr; |
| |
| struct ifaddrs *start, **end = &start; |
| |
| buf = NULL; |
| |
| memset(&sa_zero, 0, sizeof(sa_zero)); |
| fd = socket(af, SOCK_DGRAM, 0); |
| if (fd < 0) |
| return -1; |
| |
| buf_size = 8192; |
| for (;;) { |
| buf = lws_zalloc(buf_size); |
| if (buf == NULL) { |
| ret = ENOMEM; |
| goto error_out; |
| } |
| ifconf.ifc_len = buf_size; |
| ifconf.ifc_buf = buf; |
| |
| /* |
| * Solaris returns EINVAL when the buffer is too small. |
| */ |
| if (ioctl(fd, siocgifconf, &ifconf) < 0 && errno != EINVAL) { |
| ret = errno; |
| goto error_out; |
| } |
| /* |
| * Can the difference between a full and a overfull buf |
| * be determined? |
| */ |
| |
| if (ifconf.ifc_len < (int)buf_size) |
| break; |
| lws_free(buf); |
| buf_size *= 2; |
| } |
| |
| for (p = ifconf.ifc_buf; p < ifconf.ifc_buf + ifconf.ifc_len; p += sz) { |
| struct ifreq ifreq; |
| struct sockaddr *sa; |
| size_t salen; |
| |
| ifr = (struct ifreq *)p; |
| sa = &ifr->ifr_addr; |
| |
| sz = ifreq_sz; |
| salen = sizeof(struct sockaddr); |
| #ifdef LWS_HAVE_STRUCT_SOCKADDR_SA_LEN |
| salen = sa->sa_len; |
| sz = max(sz, sizeof(ifr->ifr_name) + sa->sa_len); |
| #endif |
| #ifdef SA_LEN |
| salen = SA_LEN(sa); |
| sz = max(sz, sizeof(ifr->ifr_name) + SA_LEN(sa)); |
| #endif |
| memset(&ifreq, 0, sizeof(ifreq)); |
| memcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name)); |
| |
| if (ioctl(fd, siocgifflags, &ifreq) < 0) { |
| ret = errno; |
| goto error_out; |
| } |
| |
| *end = lws_malloc(sizeof(**end)); |
| |
| (*end)->ifa_next = NULL; |
| (*end)->ifa_name = strdup(ifr->ifr_name); |
| (*end)->ifa_flags = ifreq.ifr_flags; |
| (*end)->ifa_addr = lws_malloc(salen); |
| memcpy((*end)->ifa_addr, sa, salen); |
| (*end)->ifa_netmask = NULL; |
| |
| #if 0 |
| /* fix these when we actually need them */ |
| if (ifreq.ifr_flags & IFF_BROADCAST) { |
| (*end)->ifa_broadaddr = |
| lws_malloc(sizeof(ifr->ifr_broadaddr)); |
| memcpy((*end)->ifa_broadaddr, &ifr->ifr_broadaddr, |
| sizeof(ifr->ifr_broadaddr)); |
| } else if (ifreq.ifr_flags & IFF_POINTOPOINT) { |
| (*end)->ifa_dstaddr = |
| lws_malloc(sizeof(ifr->ifr_dstaddr)); |
| memcpy((*end)->ifa_dstaddr, &ifr->ifr_dstaddr, |
| sizeof(ifr->ifr_dstaddr)); |
| } else |
| (*end)->ifa_dstaddr = NULL; |
| #else |
| (*end)->ifa_dstaddr = NULL; |
| #endif |
| (*end)->ifa_data = NULL; |
| |
| end = &(*end)->ifa_next; |
| |
| } |
| *ifap = start; |
| close(fd); |
| lws_free(buf); |
| return 0; |
| |
| error_out: |
| close(fd); |
| lws_free(buf); |
| errno = ret; |
| |
| return -1; |
| } |
| |
| int |
| getifaddrs(struct ifaddrs **ifap) |
| { |
| int ret = -1; |
| errno = ENXIO; |
| #if defined(AF_INET6) && defined(SIOCGIF6CONF) && defined(SIOCGIF6FLAGS) |
| if (ret) |
| ret = getifaddrs2(ifap, AF_INET6, SIOCGIF6CONF, SIOCGIF6FLAGS, |
| sizeof(struct in6_ifreq)); |
| #endif |
| #if defined(LWS_HAVE_IPV6) && defined(SIOCGIFCONF) |
| if (ret) |
| ret = getifaddrs2(ifap, AF_INET6, SIOCGIFCONF, SIOCGIFFLAGS, |
| sizeof(struct ifreq)); |
| #endif |
| #if defined(AF_INET) && defined(SIOCGIFCONF) && defined(SIOCGIFFLAGS) |
| if (ret) |
| ret = getifaddrs2(ifap, AF_INET, SIOCGIFCONF, SIOCGIFFLAGS, |
| sizeof(struct ifreq)); |
| #endif |
| return ret; |
| } |
| |
| void |
| freeifaddrs(struct ifaddrs *ifp) |
| { |
| struct ifaddrs *p, *q; |
| |
| for (p = ifp; p; ) { |
| lws_free(p->ifa_name); |
| lws_free(p->ifa_addr); |
| lws_free(p->ifa_dstaddr); |
| lws_free(p->ifa_netmask); |
| lws_free(p->ifa_data); |
| q = p; |
| p = p->ifa_next; |
| lws_free(q); |
| } |
| } |
| |
| #ifdef TEST |
| |
| void |
| print_addr(const char *s, struct sockaddr *sa) |
| { |
| int i; |
| printf(" %s=%d/", s, sa->sa_family); |
| #ifdef LWS_HAVE_STRUCT_SOCKADDR_SA_LEN |
| for (i = 0; |
| i < sa->sa_len - ((long)sa->sa_data - (long)&sa->sa_family); i++) |
| printf("%02x", ((unsigned char *)sa->sa_data)[i]); |
| #else |
| for (i = 0; i < sizeof(sa->sa_data); i++) |
| printf("%02x", ((unsigned char *)sa->sa_data)[i]); |
| #endif |
| printf("\n"); |
| } |
| |
| void |
| print_ifaddrs(struct ifaddrs *x) |
| { |
| struct ifaddrs *p; |
| |
| for (p = x; p; p = p->ifa_next) { |
| printf("%s\n", p->ifa_name); |
| printf(" flags=%x\n", p->ifa_flags); |
| if (p->ifa_addr) |
| print_addr("addr", p->ifa_addr); |
| if (p->ifa_dstaddr) |
| print_addr("dstaddr", p->ifa_dstaddr); |
| if (p->ifa_netmask) |
| print_addr("netmask", p->ifa_netmask); |
| printf(" %p\n", p->ifa_data); |
| } |
| } |
| |
| int |
| main() |
| { |
| struct ifaddrs *a = NULL, *b; |
| getifaddrs2(&a, AF_INET, SIOCGIFCONF, |
| SIOCGIFFLAGS, sizeof(struct ifreq)); |
| print_ifaddrs(a); |
| printf("---\n"); |
| getifaddrs(&b); |
| print_ifaddrs(b); |
| return 0; |
| } |
| #endif |
| #endif |