tree c51102f58918bab789ec4df446d8667f6271f150
parent 4ed0f4e99453edcb36d913d50428da0b92d7cdb7
author Harald Welte <laforge@osmocom.org> 1607634023 +0100
committer Harald Welte <laforge@osmocom.org> 1607634093 +0100

gprs_ns2_fr: guard against race between socket(AF_PACKET) and bind()

An AF_PACKET socket will immediately receive packets of _all_ interfaces
until it is bound to one specific interface.  This introduces a race
condition between the socket() and the bind() syscall.

Let's use the ifindex passed for each packet in recvmsg() to drop
any packets received for other interfaces.

Change-Id: I8f708ba4f9b7f76525acce17b24a8f7b125a1c1c
Related: SYS#5245