fdo-mirrors/NetworkManager
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git synced 2025-12-24 19:30:07 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

n-dhcp4/socket: use SO_REUSEADDR on UDP socket

Browse source 
Otherwise, other applications cannot bind to port 0.0.0.0:68 at the same time.
This is for example what dhclient wants to do. So even when running
dhclient on another, unrelated interface, it would fail to bind the UDP
socket and quit.

Note that also systemd-networkd's DHCPv4 client sets this socket option.
Presumably for the same reasons.

Signed-off-by: Thomas Haller <thaller@redhat.com>

https://github.com/nettools/n-dhcp4/pull/12
This commit is contained in:
Thomas Haller 2019-12-11 09:22:47 +01:00
parent 622eef4882
commit 53b74bc614
1 changed files with 4 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
shared/n-dhcp4/src/n-dhcp4-socket.c
View file

@ -195,6 +195,10 @@ int n_dhcp4_c_socket_udp_new(int *sockfdp,
if (sockfd < 0)
return -errno;
r = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
if (r < 0)
return -errno;
r = setsockopt(sockfd, SOL_SOCKET, SO_ATTACH_FILTER, &fprog, sizeof(fprog));
if (r < 0)
return -errno;