|
|
@@ -0,0 +1,20 @@
|
|
|
+libpcap opens /dev/bpfX as O_RDONLY rather than O_RDWR. This
|
|
|
+affects applications which open BPF using pcap_open_live(),
|
|
|
+then get the fileno and try to use it to send packets. An
|
|
|
+example application having this problem with BGP is UCARP
|
|
|
+(http://www.ucarp.org/), which silently fails to send packets.
|
|
|
+See also: http://www.freebsd.org/cgi/query-pr.cgi?pr=72814
|
|
|
+
|
|
|
+Index: pcap-bpf.c
|
|
|
+--- pcap-bpf.c.orig 2003-11-22 01:06:28 +0100
|
|
|
++++ pcap-bpf.c 2004-12-09 22:57:15 +0100
|
|
|
+@@ -468,6 +468,8 @@
|
|
|
+ do {
|
|
|
+ (void)snprintf(device, sizeof(device), "/dev/bpf%d", n++);
|
|
|
+- fd = open(device, O_RDONLY);
|
|
|
++ fd = open(device, O_RDWR);
|
|
|
++ if (fd < 0 && errno == EACCES)
|
|
|
++ fd = open(device, O_RDONLY);
|
|
|
+ } while (fd < 0 && errno == EBUSY);
|
|
|
+
|
|
|
+ /*
|
