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n-dhcp4: allow calling listen() on already listening connection

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When the client enters the INIT state, it calls listen() on the
connection connection to create the packet socket. However, if the
client is coming from the REBOOTING state after a NAK, the connection
is already in the listening state; do nothing in such case.

(cherry picked from commit 4bcdc3c1eb)
This commit is contained in:
Beniamino Galvani 2020-01-07 12:01:39 +01:00
parent 568c19f07d
commit 2e1d3ae572
1 changed files with 3 additions and 0 deletions
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3
shared/n-dhcp4/src/n-dhcp4-c-connection.c
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@ -139,6 +139,9 @@ int n_dhcp4_c_connection_listen(NDhcp4CConnection *connection) {
_c_cleanup_(c_closep) int fd_packet = -1;
int r;
if (connection->state == N_DHCP4_C_CONNECTION_STATE_PACKET)
return 0;
c_assert(connection->state == N_DHCP4_C_CONNECTION_STATE_INIT ||
connection->state == N_DHCP4_C_CONNECTION_STATE_DRAINING ||
connection->state == N_DHCP4_C_CONNECTION_STATE_UDP);