diff options
Diffstat (limited to 'src/libsystemd-network/sd-dhcp-client.c')
| -rw-r--r-- | src/libsystemd-network/sd-dhcp-client.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c index 9cc56364d2..b5f85399ad 100644 --- a/src/libsystemd-network/sd-dhcp-client.c +++ b/src/libsystemd-network/sd-dhcp-client.c @@ -615,11 +615,18 @@ static int client_message_init( it MUST include that list in any subsequent DHCPREQUEST messages. */ - r = dhcp_option_append(&packet->dhcp, optlen, &optoffset, 0, - SD_DHCP_OPTION_PARAMETER_REQUEST_LIST, - client->req_opts_size, client->req_opts); - if (r < 0) - return r; + + /* RFC7844 section 3: + MAY contain the Parameter Request List option. */ + /* NOTE: in case that there would be an option to do not send + * any PRL at all, the size should be checked before sending */ + if (client->req_opts_size > 0) { + r = dhcp_option_append(&packet->dhcp, optlen, &optoffset, 0, + SD_DHCP_OPTION_PARAMETER_REQUEST_LIST, + client->req_opts_size, client->req_opts); + if (r < 0) + return r; + } /* RFC2131 section 3.5: The client SHOULD include the ’maximum DHCP message size’ option to |