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-rw-r--r--contrib/libpcap/pcap-win32.c446
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diff --git a/contrib/libpcap/pcap-win32.c b/contrib/libpcap/pcap-win32.c
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+++ b/contrib/libpcap/pcap-win32.c
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+/*
+ * Copyright (c) 1999 - 2003
+ * NetGroup, Politecnico di Torino (Italy)
+ * 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 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/pcap-win32.c,v 1.15.2.3 2003/11/30 02:32:02 guy Exp $ (LBL)";
+#endif
+
+#include <pcap-int.h>
+#include <packet32.h>
+#include <Ntddndis.h>
+#ifdef __MINGW32__
+int* _errno();
+#define errno (*_errno())
+#endif /* __MINGW32__ */
+
+static int pcap_setfilter_win32(pcap_t *, struct bpf_program *);
+static int pcap_getnonblock_win32(pcap_t *, char *);
+static int pcap_setnonblock_win32(pcap_t *, int, char *);
+
+#define PcapBufSize 256000 /*dimension of the buffer in the pcap_t structure*/
+#define SIZE_BUF 1000000
+
+/*
+ * Header that the WinPcap driver associates to the packets.
+ * Once was in bpf.h
+ */
+struct bpf_hdr {
+ struct timeval bh_tstamp; /* time stamp */
+ bpf_u_int32 bh_caplen; /* length of captured portion */
+ bpf_u_int32 bh_datalen; /* original length of packet */
+ u_short bh_hdrlen; /* length of bpf header (this struct
+ plus alignment padding) */
+};
+
+/* Start winsock */
+int
+wsockinit()
+{
+ WORD wVersionRequested;
+ WSADATA wsaData;
+ int err;
+ wVersionRequested = MAKEWORD( 1, 1);
+ err = WSAStartup( wVersionRequested, &wsaData );
+ if ( err != 0 )
+ {
+ return -1;
+ }
+ return 0;
+}
+
+
+static int
+pcap_stats_win32(pcap_t *p, struct pcap_stat *ps)
+{
+
+ if(PacketGetStats(p->adapter, (struct bpf_stat*)ps) != TRUE){
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "PacketGetStats error: %s", pcap_win32strerror());
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+pcap_read_win32(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
+{
+ int cc;
+ int n = 0;
+ register u_char *bp, *ep;
+
+ cc = p->cc;
+ if (p->cc == 0) {
+ /*
+ * Has "pcap_breakloop()" been called?
+ */
+ if (p->break_loop) {
+ /*
+ * Yes - clear the flag that indicates that it
+ * has, and return -2 to indicate that we were
+ * told to break out of the loop.
+ */
+ p->break_loop = 0;
+ return (-2);
+ }
+
+ /* capture the packets */
+ if(PacketReceivePacket(p->adapter,p->Packet,TRUE)==FALSE){
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "read error: PacketReceivePacket failed");
+ return (-1);
+ }
+
+ cc = p->Packet->ulBytesReceived;
+
+ bp = p->Packet->Buffer;
+ }
+ else
+ bp = p->bp;
+
+ /*
+ * Loop through each packet.
+ */
+#define bhp ((struct bpf_hdr *)bp)
+ ep = bp + cc;
+ while (1) {
+ register int caplen, hdrlen;
+
+ /*
+ * Has "pcap_breakloop()" been called?
+ * If so, return immediately - if we haven't read any
+ * packets, clear the flag and return -2 to indicate
+ * that we were told to break out of the loop, otherwise
+ * leave the flag set, so that the *next* call will break
+ * out of the loop without having read any packets, and
+ * return the number of packets we've processed so far.
+ */
+ if (p->break_loop) {
+ if (n == 0) {
+ p->break_loop = 0;
+ return (-2);
+ } else {
+ p->bp = bp;
+ p->cc = ep - bp;
+ return (n);
+ }
+ }
+ if (bp >= ep)
+ break;
+
+ caplen = bhp->bh_caplen;
+ hdrlen = bhp->bh_hdrlen;
+
+ /*
+ * XXX A bpf_hdr matches a pcap_pkthdr.
+ */
+ (*callback)(user, (struct pcap_pkthdr*)bp, bp + hdrlen);
+ bp += BPF_WORDALIGN(caplen + hdrlen);
+ if (++n >= cnt && cnt > 0) {
+ p->bp = bp;
+ p->cc = ep - bp;
+ return (n);
+ }
+ }
+#undef bhp
+ p->cc = 0;
+ return (n);
+}
+
+
+static void
+pcap_close_win32(pcap_t *p)
+{
+ if (p->buffer != NULL)
+ free(p->buffer);
+ if (p->adapter != NULL) {
+ PacketCloseAdapter(p->adapter);
+ p->adapter = NULL;
+ }
+}
+
+pcap_t *
+pcap_open_live(const char *device, int snaplen, int promisc, int to_ms,
+ char *ebuf)
+{
+ register pcap_t *p;
+ NetType type;
+
+ /* Init WinSock */
+ wsockinit();
+
+ p = (pcap_t *)malloc(sizeof(*p));
+ if (p == NULL)
+ {
+ snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
+ return (NULL);
+ }
+ memset(p, 0, sizeof(*p));
+ p->adapter=NULL;
+
+ p->adapter = PacketOpenAdapter((char*)device);
+
+ if (p->adapter == NULL)
+ {
+ /* Adapter detected but we are not able to open it. Return failure. */
+ snprintf(ebuf, PCAP_ERRBUF_SIZE, "Error opening adapter: %s", pcap_win32strerror());
+ return NULL;
+ }
+
+ /*get network type*/
+ if(PacketGetNetType (p->adapter,&type) == FALSE)
+ {
+ snprintf(ebuf, PCAP_ERRBUF_SIZE, "Cannot determine the network type: %s", pcap_win32strerror());
+ goto bad;
+ }
+
+ /*Set the linktype*/
+ switch (type.LinkType)
+ {
+ case NdisMediumWan:
+ p->linktype = DLT_EN10MB;
+ break;
+
+ case NdisMedium802_3:
+ p->linktype = DLT_EN10MB;
+ break;
+
+ case NdisMediumFddi:
+ p->linktype = DLT_FDDI;
+ break;
+
+ case NdisMedium802_5:
+ p->linktype = DLT_IEEE802;
+ break;
+
+ case NdisMediumArcnetRaw:
+ p->linktype = DLT_ARCNET;
+ break;
+
+ case NdisMediumArcnet878_2:
+ p->linktype = DLT_ARCNET;
+ break;
+
+ case NdisMediumAtm:
+ p->linktype = DLT_ATM_RFC1483;
+ break;
+
+ default:
+ p->linktype = DLT_EN10MB; /*an unknown adapter is assumed to be ethernet*/
+ break;
+ }
+
+ /* Set promisquous mode */
+ if (promisc) PacketSetHwFilter(p->adapter,NDIS_PACKET_TYPE_PROMISCUOUS);
+ else PacketSetHwFilter(p->adapter,NDIS_PACKET_TYPE_ALL_LOCAL);
+
+ /* Set the buffer size */
+ p->bufsize = PcapBufSize;
+
+ p->buffer = (u_char *)malloc(PcapBufSize);
+ if (p->buffer == NULL)
+ {
+ snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
+ goto bad;
+ }
+
+ p->snapshot = snaplen;
+
+ /* allocate Packet structure used during the capture */
+ if((p->Packet = PacketAllocatePacket())==NULL)
+ {
+ snprintf(ebuf, PCAP_ERRBUF_SIZE, "failed to allocate the PACKET structure");
+ goto bad;
+ }
+
+ PacketInitPacket(p->Packet,(BYTE*)p->buffer,p->bufsize);
+
+ /* allocate the standard buffer in the driver */
+ if(PacketSetBuff( p->adapter, SIZE_BUF)==FALSE)
+ {
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,"driver error: not enough memory to allocate the kernel buffer\n");
+ goto bad;
+ }
+
+ /* tell the driver to copy the buffer only if it contains at least 16K */
+ if(PacketSetMinToCopy(p->adapter,16000)==FALSE)
+ {
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,"Error calling PacketSetMinToCopy: %s\n", pcap_win32strerror());
+ goto bad;
+ }
+
+ PacketSetReadTimeout(p->adapter, to_ms);
+
+ p->read_op = pcap_read_win32;
+ p->setfilter_op = pcap_setfilter_win32;
+ p->set_datalink_op = NULL; /* can't change data link type */
+ p->getnonblock_op = pcap_getnonblock_win32;
+ p->setnonblock_op = pcap_setnonblock_win32;
+ p->stats_op = pcap_stats_win32;
+ p->close_op = pcap_close_win32;
+
+ return (p);
+bad:
+ if (p->adapter)
+ PacketCloseAdapter(p->adapter);
+ if (p->buffer != NULL)
+ free(p->buffer);
+ free(p);
+ return (NULL);
+}
+
+
+static int
+pcap_setfilter_win32(pcap_t *p, struct bpf_program *fp)
+{
+ if(PacketSetBpf(p->adapter,fp)==FALSE){
+ /* kernel filter not installed. */
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Driver error: cannot set bpf filter: %s", pcap_win32strerror());
+ return (-1);
+ }
+ return (0);
+}
+
+
+static int
+pcap_getnonblock_win32(pcap_t *p, char *errbuf)
+{
+ /*
+ * XXX - if there were a PacketGetReadTimeout() call, we
+ * would use it, and return 1 if the timeout is -1
+ * and 0 otherwise.
+ */
+ return (p->nonblock);
+}
+
+static int
+pcap_setnonblock_win32(pcap_t *p, int nonblock, char *errbuf)
+{
+ int newtimeout;
+
+ if (nonblock) {
+ /*
+ * Set the read timeout to -1 for non-blocking mode.
+ */
+ newtimeout = -1;
+ } else {
+ /*
+ * Restore the timeout set when the device was opened.
+ * (Note that this may be -1, in which case we're not
+ * really leaving non-blocking mode.)
+ */
+ newtimeout = p->timeout;
+ }
+ if (!PacketSetReadTimeout(p->adapter, newtimeout)) {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "PacketSetReadTimeout: %s", pcap_win32strerror());
+ return (-1);
+ }
+ p->nonblock = (newtimeout == -1);
+ return (0);
+}
+
+/* Set the driver working mode */
+int
+pcap_setmode(pcap_t *p, int mode){
+
+ if (p->adapter==NULL)
+ {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "impossible to set mode while reading from a file");
+ return -1;
+ }
+
+ if(PacketSetMode(p->adapter,mode)==FALSE)
+ {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: working mode not recognized");
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Send a packet to the network */
+int
+pcap_sendpacket(pcap_t *p, u_char *buf, int size){
+ LPPACKET PacketToSend;
+
+ if (p->adapter==NULL)
+ {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Writing a packet is allowed only on a physical adapter");
+ return -1;
+ }
+
+ PacketToSend=PacketAllocatePacket();
+ PacketInitPacket(PacketToSend,buf,size);
+ if(PacketSendPacket(p->adapter,PacketToSend,TRUE) == FALSE){
+ PacketFreePacket(PacketToSend);
+ return -1;
+ }
+
+ PacketFreePacket(PacketToSend);
+ return 0;
+}
+
+/* Set the dimension of the kernel-level capture buffer */
+int
+pcap_setbuff(pcap_t *p, int dim)
+{
+ if (p->adapter==NULL)
+ {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "The kernel buffer size cannot be set while reading from a file");
+ return -1;
+ }
+
+ if(PacketSetBuff(p->adapter,dim)==FALSE)
+ {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: not enough memory to allocate the kernel buffer");
+ return -1;
+ }
+ return 0;
+}
+
+/*set the minimum amount of data that will release a read call*/
+int
+pcap_setmintocopy(pcap_t *p, int size)
+{
+ if (p->adapter==NULL)
+ {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Impossible to set the mintocopy parameter on an offline capture");
+ return -1;
+ }
+
+ if(PacketSetMinToCopy(p->adapter, size)==FALSE)
+ {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: unable to set the requested mintocopy size");
+ return -1;
+ }
+ return 0;
+}
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