gprs_ns2_fr: use ETH_P_HDLC instead of ETH_P_ALL
When opening the socket, use ETH_P_HLDC to restrict the socket to
packet received on HLDC interfaces. This avoids packets from random
other (ethernet, ...) interfaces to appear before we can bind()
it to the actual hdlc-net-device we're interested in.
We still are racing against other HLDC net-devices, but those have
lower PPS and throughput ratese as 1G/10G or even higher speed ethernet
devices that might exist on the same machine.
Change-Id: I6a556e6e2d012c17a2777cc8b30fed0f318db178
diff --git a/src/gb/gprs_ns2_fr.c b/src/gb/gprs_ns2_fr.c
index 0e4e2d3..2d5b021 100644
--- a/src/gb/gprs_ns2_fr.c
+++ b/src/gb/gprs_ns2_fr.c
@@ -317,7 +317,7 @@
addr.sll_protocol = htons(ETH_P_ALL);
addr.sll_ifindex = ifindex;
- fd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
+ fd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_HDLC));
if (fd < 0) {
LOGP(DLNS, LOGL_ERROR, "Can not create AF_PACKET socket. Are you root or have CAP_RAW_SOCKET?\n");
return fd;