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-rw-r--r--fad-win32.c318
1 files changed, 318 insertions, 0 deletions
diff --git a/fad-win32.c b/fad-win32.c
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+++ b/fad-win32.c
@@ -0,0 +1,318 @@
+/*
+ * Copyright (c) 2002 - 2005 NetGroup, Politecnico di Torino (Italy)
+ * Copyright (c) 2005 - 2006 CACE Technologies, Davis (California)
+ * 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 Politecnico di Torino, CACE Technologies
+ * 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 COPYRIGHT HOLDERS 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 COPYRIGHT
+ * OWNER 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.
+ *
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/libpcap/fad-win32.c,v 1.11.2.3 2006/02/22 17:09:32 gianluca Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <pcap.h>
+#include <pcap-int.h>
+#include <Packet32.h>
+
+#include <errno.h>
+
+/*
+ * Add an entry to the list of addresses for an interface.
+ * "curdev" is the entry for that interface.
+ */
+static int
+add_addr_to_list(pcap_if_t *curdev, struct sockaddr *addr,
+ struct sockaddr *netmask, struct sockaddr *broadaddr,
+ struct sockaddr *dstaddr, char *errbuf)
+{
+ pcap_addr_t *curaddr, *prevaddr, *nextaddr;
+
+ /*
+ * Allocate the new entry and fill it in.
+ */
+ curaddr = (pcap_addr_t*)malloc(sizeof(pcap_addr_t));
+ if (curaddr == NULL) {
+ (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "malloc: %s", pcap_strerror(errno));
+ return (-1);
+ }
+
+ curaddr->next = NULL;
+ if (addr != NULL) {
+ curaddr->addr = (struct sockaddr*)dup_sockaddr(addr, sizeof(struct sockaddr_storage));
+ if (curaddr->addr == NULL) {
+ (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "malloc: %s", pcap_strerror(errno));
+ free(curaddr);
+ return (-1);
+ }
+ } else
+ curaddr->addr = NULL;
+
+ if (netmask != NULL) {
+ curaddr->netmask = (struct sockaddr*)dup_sockaddr(netmask, sizeof(struct sockaddr_storage));
+ if (curaddr->netmask == NULL) {
+ (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "malloc: %s", pcap_strerror(errno));
+ free(curaddr);
+ return (-1);
+ }
+ } else
+ curaddr->netmask = NULL;
+
+ if (broadaddr != NULL) {
+ curaddr->broadaddr = (struct sockaddr*)dup_sockaddr(broadaddr, sizeof(struct sockaddr_storage));
+ if (curaddr->broadaddr == NULL) {
+ (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "malloc: %s", pcap_strerror(errno));
+ free(curaddr);
+ return (-1);
+ }
+ } else
+ curaddr->broadaddr = NULL;
+
+ if (dstaddr != NULL) {
+ curaddr->dstaddr = (struct sockaddr*)dup_sockaddr(dstaddr, sizeof(struct sockaddr_storage));
+ if (curaddr->dstaddr == NULL) {
+ (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "malloc: %s", pcap_strerror(errno));
+ free(curaddr);
+ return (-1);
+ }
+ } else
+ curaddr->dstaddr = NULL;
+
+ /*
+ * Find the end of the list of addresses.
+ */
+ for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
+ nextaddr = prevaddr->next;
+ if (nextaddr == NULL) {
+ /*
+ * This is the end of the list.
+ */
+ break;
+ }
+ }
+
+ if (prevaddr == NULL) {
+ /*
+ * The list was empty; this is the first member.
+ */
+ curdev->addresses = curaddr;
+ } else {
+ /*
+ * "prevaddr" is the last member of the list; append
+ * this member to it.
+ */
+ prevaddr->next = curaddr;
+ }
+
+ return (0);
+}
+
+
+static int
+pcap_add_if_win32(pcap_if_t **devlist, char *name, const char *desc,
+ char *errbuf)
+{
+ pcap_if_t *curdev;
+ npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
+ LONG if_addr_size;
+ int res = 0;
+
+ if_addr_size = MAX_NETWORK_ADDRESSES;
+
+ /*
+ * Add an entry for this interface, with no addresses.
+ */
+ if (add_or_find_if(&curdev, devlist, name, 0, desc, errbuf) == -1) {
+ /*
+ * Failure.
+ */
+ return (-1);
+ }
+
+ /*
+ * Get the list of addresses for the interface.
+ */
+ if (!PacketGetNetInfoEx((void *)name, if_addrs, &if_addr_size)) {
+ /*
+ * Failure.
+ *
+ * We don't return an error, because this can happen with
+ * NdisWan interfaces, and we want to supply them even
+ * if we can't supply their addresses.
+ *
+ * We return an entry with an empty address list.
+ */
+ return (0);
+ }
+
+ /*
+ * Now add the addresses.
+ */
+ while (if_addr_size-- > 0) {
+ /*
+ * "curdev" is an entry for this interface; add an entry for
+ * this address to its list of addresses.
+ */
+ if(curdev == NULL)
+ break;
+ res = add_addr_to_list(curdev,
+ (struct sockaddr *)&if_addrs[if_addr_size].IPAddress,
+ (struct sockaddr *)&if_addrs[if_addr_size].SubnetMask,
+ (struct sockaddr *)&if_addrs[if_addr_size].Broadcast,
+ NULL,
+ errbuf);
+ if (res == -1) {
+ /*
+ * Failure.
+ */
+ break;
+ }
+ }
+
+ return (res);
+}
+
+
+/*
+ * Get a list of all interfaces that are up and that we can open.
+ * Returns -1 on error, 0 otherwise.
+ * The list, as returned through "alldevsp", may be null if no interfaces
+ * were up and could be opened.
+ *
+ * Win32 implementation, based on WinPcap
+ */
+int
+pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
+{
+ pcap_if_t *devlist = NULL;
+ int ret = 0;
+ const char *desc;
+ char *AdaptersName;
+ ULONG NameLength;
+ char *name;
+
+ if (!PacketGetAdapterNames(NULL, &NameLength))
+ {
+ DWORD last_error = GetLastError();
+
+ if (last_error != ERROR_INSUFFICIENT_BUFFER)
+ {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "PacketGetAdapterNames: %s",
+ pcap_win32strerror());
+ return (-1);
+ }
+ }
+
+ if (NameLength > 0)
+ AdaptersName = (char*) malloc(NameLength);
+ else
+ {
+ *alldevsp = NULL;
+ return 0;
+ }
+ if (AdaptersName == NULL)
+ {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot allocate enough memory to list the adapters.");
+ return (-1);
+ }
+
+ if (!PacketGetAdapterNames(AdaptersName, &NameLength)) {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "PacketGetAdapterNames: %s",
+ pcap_win32strerror());
+ free(AdaptersName);
+ return (-1);
+ }
+
+ /*
+ * "PacketGetAdapterNames()" returned a list of
+ * null-terminated ASCII interface name strings,
+ * terminated by a null string, followed by a list
+ * of null-terminated ASCII interface description
+ * strings, terminated by a null string.
+ * This means there are two ASCII nulls at the end
+ * of the first list.
+ *
+ * Find the end of the first list; that's the
+ * beginning of the second list.
+ */
+ desc = &AdaptersName[0];
+ while (*desc != '\0' || *(desc + 1) != '\0')
+ desc++;
+
+ /*
+ * Found it - "desc" points to the first of the two
+ * nulls at the end of the list of names, so the
+ * first byte of the list of descriptions is two bytes
+ * after it.
+ */
+ desc += 2;
+
+ /*
+ * Loop over the elements in the first list.
+ */
+ name = &AdaptersName[0];
+ while (*name != '\0') {
+ /*
+ * Add an entry for this interface.
+ */
+ if (pcap_add_if_win32(&devlist, name, desc, errbuf) == -1) {
+ /*
+ * Failure.
+ */
+ ret = -1;
+ break;
+ }
+ name += strlen(name) + 1;
+ desc += strlen(desc) + 1;
+ }
+
+ if (ret == -1) {
+ /*
+ * We had an error; free the list we've been constructing.
+ */
+ if (devlist != NULL) {
+ pcap_freealldevs(devlist);
+ devlist = NULL;
+ }
+ }
+
+ *alldevsp = devlist;
+ free(AdaptersName);
+ return (ret);
+}
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