|
|
/*
|
|
|
* 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.
|
|
|
*
|
|
|
* originally downloaded from
|
|
|
*
|
|
|
* http://ftp.uninett.no/pub/OpenBSD/src/kerberosV/src/lib/roken/getifaddrs.c
|
|
|
*/
|
|
|
|
|
|
#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 <libwebsockets.h>
|
|
|
#include "private-lib-core.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, "getifaddrs2");
|
|
|
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), "getifaddrs");
|
|
|
|
|
|
(*end)->ifa_next = NULL;
|
|
|
(*end)->ifa_name = strdup(ifr->ifr_name);
|
|
|
(*end)->ifa_flags = ifreq.ifr_flags;
|
|
|
(*end)->ifa_addr = lws_malloc(salen, "getifaddrs");
|
|
|
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), "getifaddrs");
|
|
|
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), "getifaddrs");
|
|
|
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 - ((lws_intptr_t)sa->sa_data - (lws_intptr_t)&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
|
