MFV: libpcap 1.4.0.

MFC after:	4 weeks

1 files changed, 225 insertions, 9 deletions

diff --git a/contrib/libpcap/pcap.c b/contrib/libpcap/pcap.c
index afbcb73..be884b8 100644
--- a/contrib/libpcap/pcap.c
+++ b/contrib/libpcap/pcap.c
@@ -75,8 +75,35 @@ static const char rcsid[] _U_ =
 #include "pcap-int.h"
 
 #ifdef HAVE_DAG_API
-#include <dagnew.h>
-#include <dagapi.h>
+#include "pcap-dag.h"
+#endif /* HAVE_DAG_API */
+
+#ifdef HAVE_SEPTEL_API
+#include "pcap-septel.h"
+#endif /* HAVE_SEPTEL_API */
+
+#ifdef HAVE_SNF_API
+#include "pcap-snf.h"
+#endif /* HAVE_SNF_API */
+
+#ifdef PCAP_SUPPORT_USB
+#include "pcap-usb-linux.h"
+#endif
+
+#ifdef PCAP_SUPPORT_BT
+#include "pcap-bt-linux.h"
+#endif
+
+#ifdef PCAP_SUPPORT_CAN
+#include "pcap-can-linux.h"
+#endif
+
+#ifdef PCAP_SUPPORT_CANUSB
+#include "pcap-canusb-linux.h"
+#endif
+
+#ifdef PCAP_SUPPORT_NETFILTER
+#include "pcap-netfilter-linux.h"
 #endif
 
 int 
@@ -233,6 +260,173 @@ pcap_next_ex(pcap_t *p, struct pcap_pkthdr **pkt_header,
 	return (p->read_op(p, 1, p->oneshot_callback, (u_char *)&s));
 }
 
+#if defined(DAG_ONLY)
+int
+pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
+{
+	return (dag_findalldevs(alldevsp, errbuf));
+}
+
+pcap_t *
+pcap_create(const char *source, char *errbuf)
+{
+	return (dag_create(source, errbuf));
+}
+#elif defined(SEPTEL_ONLY)
+int
+pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
+{
+	return (septel_findalldevs(alldevsp, errbuf));
+}
+
+pcap_t *
+pcap_create(const char *source, char *errbuf)
+{
+	return (septel_create(source, errbuf));
+}
+#elif defined(SNF_ONLY)
+int
+pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
+{
+	return (snf_findalldevs(alldevsp, errbuf));
+}
+
+pcap_t *
+pcap_create(const char *source, char *errbuf)
+{
+	return (snf_create(source, errbuf));
+}
+#else /* regular pcap */
+struct capture_source_type {
+	int (*findalldevs_op)(pcap_if_t **, char *);
+	pcap_t *(*create_op)(const char *, char *, int *);
+} capture_source_types[] = {
+#ifdef HAVE_DAG_API
+	{ dag_findalldevs, dag_create },
+#endif
+#ifdef HAVE_SEPTEL_API
+	{ septel_findalldevs, septel_create },
+#endif
+#ifdef HAVE_SNF_API
+	{ snf_findalldevs, snf_create },
+#endif
+#ifdef PCAP_SUPPORT_BT
+	{ bt_findalldevs, bt_create },
+#endif
+#if PCAP_SUPPORT_CANUSB
+	{ canusb_findalldevs, canusb_create },
+#endif
+#ifdef PCAP_SUPPORT_CAN
+	{ can_findalldevs, can_create },
+#endif
+#ifdef PCAP_SUPPORT_USB
+	{ usb_findalldevs, usb_create },
+#endif
+#ifdef PCAP_SUPPORT_NETFILTER
+	{ netfilter_findalldevs, netfilter_create },
+#endif
+	{ NULL, NULL }
+};
+
+/*
+ * Get a list of all capture sources 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.
+ */
+int
+pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
+{
+	size_t i;
+
+	/*
+	 * Get the list of regular interfaces first.
+	 */ 
+	if (pcap_findalldevs_interfaces(alldevsp, errbuf) == -1)
+		return (-1);	/* failure */
+
+	/*
+	 * Add any interfaces that need a platform-specific mechanism
+	 * to find.
+	 */
+	if (pcap_platform_finddevs(alldevsp, errbuf) == -1) {
+		/*
+		 * We had an error; free the list we've been
+		 * constructing.
+		 */
+		if (*alldevsp != NULL) {
+			pcap_freealldevs(*alldevsp);
+			*alldevsp = NULL;
+		}
+		return (-1);
+	}
+
+	/*
+	 * Ask each of the non-local-network-interface capture
+	 * source types what interfaces they have.
+	 */
+	for (i = 0; capture_source_types[i].findalldevs_op != NULL; i++) {
+		if (capture_source_types[i].findalldevs_op(alldevsp, errbuf) == -1) {
+			/*
+			 * We had an error; free the list we've been
+			 * constructing.
+			 */
+			if (*alldevsp != NULL) {
+				pcap_freealldevs(*alldevsp);
+				*alldevsp = NULL;
+			}
+			return (-1);
+		}
+	}
+	return (0);
+}
+
+pcap_t *
+pcap_create(const char *source, char *errbuf)
+{
+	size_t i;
+	int is_theirs;
+	pcap_t *p;
+
+	/*
+	 * A null source name is equivalent to the "any" device -
+	 * which might not be supported on this platform, but
+	 * this means that you'll get a "not supported" error
+	 * rather than, say, a crash when we try to dereference
+	 * the null pointer.
+	 */
+	if (source == NULL)
+		source = "any";
+
+	/*
+	 * Try each of the non-local-network-interface capture
+	 * source types until we find one that works for this
+	 * device or run out of types.
+	 */
+	for (i = 0; capture_source_types[i].create_op != NULL; i++) {
+		is_theirs = 0;
+		p = capture_source_types[i].create_op(source, errbuf, &is_theirs);
+		if (is_theirs) {
+			/*
+			 * The device name refers to a device of the
+			 * type in question; either it succeeded,
+			 * in which case p refers to a pcap_t to
+			 * later activate for the device, or it
+			 * failed, in which case p is null and we
+			 * should return that to report the failure
+			 * to create.
+			 */
+			return (p);
+		}
+	}
+
+	/*
+	 * OK, try it as a regular network interface.
+	 */
+	return (pcap_create_interface(source, errbuf));
+}
+#endif
+
 static void
 initialize_ops(pcap_t *p)
 {
@@ -1024,7 +1218,18 @@ pcap_geterr(pcap_t *p)
 int
 pcap_getnonblock(pcap_t *p, char *errbuf)
 {
-	return (p->getnonblock_op(p, errbuf));
+	int ret;
+
+	ret = p->getnonblock_op(p, errbuf);
+	if (ret == -1) {
+		/*
+		 * In case somebody depended on the bug wherein
+		 * the error message was put into p->errbuf
+		 * by pcap_getnonblock_fd().
+		 */
+		strlcpy(p->errbuf, errbuf, PCAP_ERRBUF_SIZE);
+	}
+	return (ret);
 }
 
 /*
@@ -1042,7 +1247,7 @@ pcap_getnonblock_fd(pcap_t *p, char *errbuf)
 
 	fdflags = fcntl(p->fd, F_GETFL, 0);
 	if (fdflags == -1) {
-		snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "F_GETFL: %s",
+		snprintf(errbuf, PCAP_ERRBUF_SIZE, "F_GETFL: %s",
 		    pcap_strerror(errno));
 		return (-1);
 	}
@@ -1056,7 +1261,18 @@ pcap_getnonblock_fd(pcap_t *p, char *errbuf)
 int
 pcap_setnonblock(pcap_t *p, int nonblock, char *errbuf)
 {
-	return (p->setnonblock_op(p, nonblock, errbuf));
+	int ret;
+
+	ret = p->setnonblock_op(p, nonblock, errbuf);
+	if (ret == -1) {
+		/*
+		 * In case somebody depended on the bug wherein
+		 * the error message was put into p->errbuf
+		 * by pcap_setnonblock_fd().
+		 */
+		strlcpy(p->errbuf, errbuf, PCAP_ERRBUF_SIZE);
+	}
+	return (ret);
 }
 
 #if !defined(WIN32) && !defined(MSDOS)
@@ -1073,7 +1289,7 @@ pcap_setnonblock_fd(pcap_t *p, int nonblock, char *errbuf)
 
 	fdflags = fcntl(p->fd, F_GETFL, 0);
 	if (fdflags == -1) {
-		snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "F_GETFL: %s",
+		snprintf(errbuf, PCAP_ERRBUF_SIZE, "F_GETFL: %s",
 		    pcap_strerror(errno));
 		return (-1);
 	}
@@ -1082,7 +1298,7 @@ pcap_setnonblock_fd(pcap_t *p, int nonblock, char *errbuf)
 	else
 		fdflags &= ~O_NONBLOCK;
 	if (fcntl(p->fd, F_SETFL, fdflags) == -1) {
-		snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "F_SETFL: %s",
+		snprintf(errbuf, PCAP_ERRBUF_SIZE, "F_SETFL: %s",
 		    pcap_strerror(errno));
 		return (-1);
 	}
@@ -1465,10 +1681,10 @@ pcap_close(pcap_t *p)
  * the packet doesn't pass and non-zero if the packet does pass.
  */
 int
-pcap_offline_filter(struct bpf_program *fp, const struct pcap_pkthdr *h,
+pcap_offline_filter(const struct bpf_program *fp, const struct pcap_pkthdr *h,
     const u_char *pkt)
 {
-	struct bpf_insn *fcode = fp->bf_insns;
+	const struct bpf_insn *fcode = fp->bf_insns;
 
 	if (fcode != NULL) 
 		return (bpf_filter(fcode, pkt, h->len, h->caplen));