mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-01 20:06:14 +02:00
f1f21f8cef
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15398 3c298f89-4303-0410-b956-a3cf2f4a3e73
150 lines
4.4 KiB
Diff
150 lines
4.4 KiB
Diff
--- a/pcap-linux.c
|
|
+++ b/pcap-linux.c
|
|
@@ -297,6 +297,12 @@ pcap_create(const char *device, char *eb
|
|
{
|
|
pcap_t *handle;
|
|
|
|
+ /*
|
|
+ * A null device name is equivalent to the "any" device.
|
|
+ */
|
|
+ if (device == NULL)
|
|
+ device = "any";
|
|
+
|
|
#ifdef HAVE_DAG_API
|
|
if (strstr(device, "dag")) {
|
|
return dag_create(device, ebuf);
|
|
@@ -338,10 +344,9 @@ pcap_can_set_rfmon_linux(pcap_t *p)
|
|
struct iwreq ireq;
|
|
#endif
|
|
|
|
- if (p->opt.source == NULL) {
|
|
+ if (strcmp(p->opt.source, "any") == 0) {
|
|
/*
|
|
- * This is equivalent to the "any" device, and we don't
|
|
- * support monitor mode on it.
|
|
+ * Monitor mode makes no sense on the "any" device.
|
|
*/
|
|
return 0;
|
|
}
|
|
@@ -518,12 +523,11 @@ pcap_activate_linux(pcap_t *handle)
|
|
handle->stats_op = pcap_stats_linux;
|
|
|
|
/*
|
|
- * NULL and "any" are special devices which give us the hint to
|
|
- * monitor all devices.
|
|
+ * The "any" device is a special device which causes us not
|
|
+ * to bind to a particular device and thus to look at all
|
|
+ * devices.
|
|
*/
|
|
- if (!device || strcmp(device, "any") == 0) {
|
|
- device = NULL;
|
|
- handle->md.device = strdup("any");
|
|
+ if (strcmp(device, "any") == 0) {
|
|
if (handle->opt.promisc) {
|
|
handle->opt.promisc = 0;
|
|
/* Just a warning. */
|
|
@@ -531,10 +535,9 @@ pcap_activate_linux(pcap_t *handle)
|
|
"Promiscuous mode not supported on the \"any\" device");
|
|
status = PCAP_WARNING_PROMISC_NOTSUP;
|
|
}
|
|
+ }
|
|
|
|
- } else
|
|
- handle->md.device = strdup(device);
|
|
-
|
|
+ handle->md.device = strdup(device);
|
|
if (handle->md.device == NULL) {
|
|
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "strdup: %s",
|
|
pcap_strerror(errno) );
|
|
@@ -1657,19 +1660,21 @@ static int
|
|
activate_new(pcap_t *handle)
|
|
{
|
|
#ifdef HAVE_PF_PACKET_SOCKETS
|
|
+ const char *device = handle->opt.source;
|
|
+ int is_any_device = (strcmp(device, "any") == 0);
|
|
int sock_fd = -1, arptype, val;
|
|
int err = 0;
|
|
struct packet_mreq mr;
|
|
- const char* device = handle->opt.source;
|
|
|
|
/*
|
|
- * Open a socket with protocol family packet. If a device is
|
|
- * given we try to open it in raw mode otherwise we use
|
|
- * the cooked interface.
|
|
- */
|
|
- sock_fd = device ?
|
|
- socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))
|
|
- : socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_ALL));
|
|
+ * Open a socket with protocol family packet. If the
|
|
+ * "any" device was specified, we open a SOCK_DGRAM
|
|
+ * socket for the cooked interface, otherwise we first
|
|
+ * 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));
|
|
|
|
if (sock_fd == -1) {
|
|
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
|
|
@@ -1704,7 +1709,7 @@ activate_new(pcap_t *handle)
|
|
* to cooked mode if we have an unknown interface type
|
|
* or a type we know doesn't work well in raw mode.
|
|
*/
|
|
- if (device) {
|
|
+ if (!is_any_device) {
|
|
/* Assume for now we don't need cooked mode. */
|
|
handle->md.cooked = 0;
|
|
|
|
@@ -1819,15 +1824,23 @@ activate_new(pcap_t *handle)
|
|
}
|
|
} else {
|
|
/*
|
|
- * This is cooked mode.
|
|
+ * The "any" device.
|
|
+ */
|
|
+ if (handle->opt.rfmon) {
|
|
+ /*
|
|
+ * It doesn't support monitor mode.
|
|
+ */
|
|
+ return PCAP_ERROR_RFMON_NOTSUP;
|
|
+ }
|
|
+
|
|
+ /*
|
|
+ * It uses cooked mode.
|
|
*/
|
|
handle->md.cooked = 1;
|
|
handle->linktype = DLT_LINUX_SLL;
|
|
|
|
/*
|
|
* We're not bound to a device.
|
|
- * XXX - true? Or true only if we're using
|
|
- * the "any" device?
|
|
* For now, we're using this as an indication
|
|
* that we can't transmit; stop doing that only
|
|
* if we figure out how to transmit in cooked
|
|
@@ -1852,10 +1865,13 @@ activate_new(pcap_t *handle)
|
|
|
|
/*
|
|
* Hmm, how can we set promiscuous mode on all interfaces?
|
|
- * I am not sure if that is possible at all.
|
|
+ * I am not sure if that is possible at all. For now, we
|
|
+ * silently ignore attempts to turn promiscuous mode on
|
|
+ * for the "any" device (so you don't have to explicitly
|
|
+ * disable it in programs such as tcpdump).
|
|
*/
|
|
|
|
- if (device && handle->opt.promisc) {
|
|
+ if (!is_any_device && handle->opt.promisc) {
|
|
memset(&mr, 0, sizeof(mr));
|
|
mr.mr_ifindex = handle->md.ifindex;
|
|
mr.mr_type = PACKET_MR_PROMISC;
|
|
@@ -3118,7 +3134,7 @@ activate_old(pcap_t *handle)
|
|
|
|
/* Bind to the given device */
|
|
|
|
- if (!device) {
|
|
+ if (strcmp(device, "any") == 0) {
|
|
strncpy(handle->errbuf, "pcap_activate: The \"any\" device isn't supported on 2.0[.x]-kernel systems",
|
|
PCAP_ERRBUF_SIZE);
|
|
return PCAP_ERROR;
|