162 lines
3.7 KiB
C
162 lines
3.7 KiB
C
/***********************************************************************
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* Copyright (c) 2009, Secure Endpoints Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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**********************************************************************/
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#include<config.h>
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#include <roken.h>
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#include <ifaddrs.h>
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#ifndef _WIN32
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#error This is a Windows specific implementation.
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#endif
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static struct sockaddr *
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dupaddr(const sockaddr_gen * src)
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{
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sockaddr_gen * d = malloc(sizeof(*d));
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if (d) {
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memcpy(d, src, sizeof(*d));
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}
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return (struct sockaddr *) d;
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}
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int ROKEN_LIB_FUNCTION
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rk_getifaddrs(struct ifaddrs **ifpp)
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{
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SOCKET s = INVALID_SOCKET;
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size_t il_len = 8192;
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int ret = -1;
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INTERFACE_INFO *il = NULL;
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*ifpp = NULL;
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s = socket(AF_INET, SOCK_DGRAM, 0);
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if (s == INVALID_SOCKET)
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return -1;
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for (;;) {
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DWORD cbret = 0;
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il = malloc(il_len);
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if (!il)
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break;
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ZeroMemory(il, il_len);
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if (WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0,
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(LPVOID) il, (DWORD) il_len, &cbret,
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NULL, NULL) == 0) {
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il_len = cbret;
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break;
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}
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free (il);
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il = NULL;
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if (WSAGetLastError() == WSAEFAULT && cbret > il_len) {
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il_len = cbret;
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} else {
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break;
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}
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}
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if (!il)
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goto _exit;
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/* il is an array of INTERFACE_INFO structures. il_len has the
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actual size of the buffer. The number of elements is
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il_len/sizeof(INTERFACE_INFO) */
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{
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size_t n = il_len / sizeof(INTERFACE_INFO);
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size_t i;
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for (i = 0; i < n; i++ ) {
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struct ifaddrs *ifp;
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ifp = malloc(sizeof(*ifp));
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if (ifp == NULL)
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break;
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ZeroMemory(ifp, sizeof(*ifp));
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ifp->ifa_next = NULL;
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ifp->ifa_name = NULL;
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ifp->ifa_flags = il[i].iiFlags;
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ifp->ifa_addr = dupaddr(&il[i].iiAddress);
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ifp->ifa_netmask = dupaddr(&il[i].iiNetmask);
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ifp->ifa_broadaddr = dupaddr(&il[i].iiBroadcastAddress);
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ifp->ifa_data = NULL;
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*ifpp = ifp;
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ifpp = &ifp->ifa_next;
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}
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if (i == n)
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ret = 0;
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}
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_exit:
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if (s != INVALID_SOCKET)
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closesocket(s);
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if (il)
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free (il);
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return ret;
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}
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void ROKEN_LIB_FUNCTION
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rk_freeifaddrs(struct ifaddrs *ifp)
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{
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struct ifaddrs *p, *q;
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for(p = ifp; p; ) {
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if (p->ifa_name)
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free(p->ifa_name);
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if(p->ifa_addr)
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free(p->ifa_addr);
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if(p->ifa_dstaddr)
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free(p->ifa_dstaddr);
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if(p->ifa_netmask)
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free(p->ifa_netmask);
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if(p->ifa_data)
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free(p->ifa_data);
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q = p;
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p = p->ifa_next;
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free(q);
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}
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}
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