+--- a/pcap-int.h
++++ b/pcap-int.h
+@@ -187,6 +187,7 @@ struct pcap_opt {
+ char *source;
+ int promisc;
+ int rfmon;
++ int proto; /* protocol for packet socket (linux) */
+ };
+
+ /*
+--- a/pcap-linux.c
++++ b/pcap-linux.c
+@@ -273,7 +273,7 @@ static int iface_get_id(int fd, const ch
+ static int iface_get_mtu(int fd, const char *device, char *ebuf);
+ static int iface_get_arptype(int fd, const char *device, char *ebuf);
+ #ifdef HAVE_PF_PACKET_SOCKETS
+-static int iface_bind(int fd, int ifindex, char *ebuf);
++static int iface_bind(int fd, int ifindex, char *ebuf, unsigned short proto);
+ static int has_wext(int sock_fd, const char *device, char *ebuf);
+ static int enter_rfmon_mode_wext(pcap_t *handle, int sock_fd,
+ const char *device);
+@@ -362,7 +362,7 @@ pcap_can_set_rfmon_linux(pcap_t *p)
+ * (We assume that if we have Wireless Extensions support
+ * we also have PF_PACKET support.)
+ */
+- sock_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
++ sock_fd = socket(PF_PACKET, SOCK_RAW, p->opt.proto);
+ if (sock_fd == -1) {
+ (void)snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "socket: %s", pcap_strerror(errno));
+@@ -522,6 +522,9 @@ pcap_activate_linux(pcap_t *handle)
+ handle->read_op = pcap_read_linux;
+ handle->stats_op = pcap_stats_linux;
+
++ if (handle->opt.proto < 0)
++ handle->opt.proto = (int) htons(ETH_P_ALL);
++
+ /*
+ * The "any" device is a special device which causes us not
+ * to bind to a particular device and thus to look at all
+@@ -1673,8 +1676,8 @@ activate_new(pcap_t *handle)
+ * try a SOCK_RAW socket for the raw interface.
+ */
+ sock_fd = is_any_device ?
+- socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_ALL)) :
+- socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
++ socket(PF_PACKET, SOCK_DGRAM, handle->opt.proto) :
++ socket(PF_PACKET, SOCK_RAW, handle->opt.proto);
+
+ if (sock_fd == -1) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
+@@ -1763,7 +1766,7 @@ activate_new(pcap_t *handle)
+ return PCAP_ERROR;
+ }
+ sock_fd = socket(PF_PACKET, SOCK_DGRAM,
+- htons(ETH_P_ALL));
++ handle->opt.proto);
+ if (sock_fd == -1) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "socket: %s", pcap_strerror(errno));
+@@ -1815,7 +1818,7 @@ activate_new(pcap_t *handle)
+ }
+
+ if ((err = iface_bind(sock_fd, handle->md.ifindex,
+- handle->errbuf)) != 1) {
++ handle->errbuf, handle->opt.proto)) != 1) {
+ close(sock_fd);
+ if (err < 0)
+ return err;
+@@ -2440,7 +2443,7 @@ iface_get_id(int fd, const char *device,
+ * or a PCAP_ERROR_ value on a hard error.
+ */
+ static int
+-iface_bind(int fd, int ifindex, char *ebuf)
++iface_bind(int fd, int ifindex, char *ebuf, unsigned short proto)
+ {
+ struct sockaddr_ll sll;
+ int err;
+@@ -2449,7 +2452,7 @@ iface_bind(int fd, int ifindex, char *eb
+ memset(&sll, 0, sizeof(sll));
+ sll.sll_family = AF_PACKET;
+ sll.sll_ifindex = ifindex;
+- sll.sll_protocol = htons(ETH_P_ALL);
++ sll.sll_protocol = proto;
+
+ if (bind(fd, (struct sockaddr *) &sll, sizeof(sll)) == -1) {
+ if (errno == ENETDOWN) {
+@@ -3119,7 +3122,7 @@ activate_old(pcap_t *handle)
+
+ /* Open the socket */
+
+- handle->fd = socket(PF_INET, SOCK_PACKET, htons(ETH_P_ALL));
++ handle->fd = socket(PF_INET, SOCK_PACKET, handle->opt.proto);
+ if (handle->fd == -1) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "socket: %s", pcap_strerror(errno));
+--- a/pcap.c
++++ b/pcap.c
+@@ -152,6 +152,8 @@ pcap_create_common(const char *source, c
+ pcap_set_snaplen(p, 65535); /* max packet size */
+ p->opt.promisc = 0;
+ p->opt.buffer_size = 0;
++ p->opt.proto = -1;
++
+ return (p);
+ }
+
+@@ -212,6 +214,15 @@ pcap_set_buffer_size(pcap_t *p, int buff
+ }
+
+ int
++pcap_set_protocol(pcap_t *p, unsigned short proto)
++{
++ if (pcap_check_activated(p))
++ return PCAP_ERROR_ACTIVATED;
++ p->opt.proto = proto;
++ return 0;
++}
++
++int
+ pcap_activate(pcap_t *p)
+ {
+ int status;
+--- a/pcap/pcap.h
++++ b/pcap/pcap.h
+@@ -61,6 +61,7 @@ extern "C" {
+ #define PCAP_VERSION_MINOR 4
+
+ #define PCAP_ERRBUF_SIZE 256
++#define HAS_PROTO_EXTENSION
+
+ /*
+ * Compatibility for systems that have a bpf.h that
+@@ -263,6 +264,7 @@ int pcap_can_set_rfmon(pcap_t *);
+ int pcap_set_rfmon(pcap_t *, int);
+ int pcap_set_timeout(pcap_t *, int);
+ int pcap_set_buffer_size(pcap_t *, int);
++int pcap_set_protocol(pcap_t *, unsigned short);
+ int pcap_activate(pcap_t *);
+
+ pcap_t *pcap_open_live(const char *, int, int, int, char *);
projects / openwrt / svn-archive / archive.git / commitdiff