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| author | Yu Watanabe <watanabe.yu+github@gmail.com> | 2023-05-11 16:42:27 +0900 |
|---|---|---|
| committer | Luca Boccassi <luca.boccassi@gmail.com> | 2023-05-13 12:37:17 +0100 |
| commit | 0c3ea0c2222df1b34c12ad5354dc5f835686fc5c (patch) | |
| tree | fe6198255652c38d44531ee748a1269df7c36bf7 /src/libsystemd-network | |
| parent | d5e6c4be91860c386170a26f5e43dd7bfe94ae77 (diff) | |
| download | systemd-0c3ea0c2222df1b34c12ad5354dc5f835686fc5c.tar.gz | |
sd-dhcp-server: also send DNS servers or friends on DHCPOFFER
From RFC 2131 section 4.3.1 (https://www.rfc-editor.org/rfc/rfc2131#section-4.3.1):
----
The server MUST return to the client:
- Parameters requested by the client, according to the following rules:
-- IF the server has been explicitly configured with a default
value for the parameter, the server MUST include that value
in an appropriate option in the 'option' field,
----
The sentence is not only for ACK, but for all (positive) responses, that
is DHCPOFFER and DHCPACK.
Fixes #27471.
Diffstat (limited to 'src/libsystemd-network')
| -rw-r--r-- | src/libsystemd-network/sd-dhcp-server.c | 57 |
1 files changed, 27 insertions, 30 deletions
diff --git a/src/libsystemd-network/sd-dhcp-server.c b/src/libsystemd-network/sd-dhcp-server.c index 55290ee0f1..196867360f 100644 --- a/src/libsystemd-network/sd-dhcp-server.c +++ b/src/libsystemd-network/sd-dhcp-server.c @@ -564,6 +564,15 @@ static int server_send_offer_or_ack( be32_t address, uint8_t type) { + static const uint8_t option_map[_SD_DHCP_LEASE_SERVER_TYPE_MAX] = { + [SD_DHCP_LEASE_DNS] = SD_DHCP_OPTION_DOMAIN_NAME_SERVER, + [SD_DHCP_LEASE_NTP] = SD_DHCP_OPTION_NTP_SERVER, + [SD_DHCP_LEASE_SIP] = SD_DHCP_OPTION_SIP_SERVER, + [SD_DHCP_LEASE_POP3] = SD_DHCP_OPTION_POP3_SERVER, + [SD_DHCP_LEASE_SMTP] = SD_DHCP_OPTION_SMTP_SERVER, + [SD_DHCP_LEASE_LPR] = SD_DHCP_OPTION_LPR_SERVER, + }; + _cleanup_free_ DHCPPacket *packet = NULL; sd_dhcp_option *j; be32_t lease_time; @@ -619,38 +628,26 @@ static int server_send_offer_or_ack( return r; } - if (type == DHCP_ACK) { - static const uint8_t option_map[_SD_DHCP_LEASE_SERVER_TYPE_MAX] = { - [SD_DHCP_LEASE_DNS] = SD_DHCP_OPTION_DOMAIN_NAME_SERVER, - [SD_DHCP_LEASE_NTP] = SD_DHCP_OPTION_NTP_SERVER, - [SD_DHCP_LEASE_SIP] = SD_DHCP_OPTION_SIP_SERVER, - [SD_DHCP_LEASE_POP3] = SD_DHCP_OPTION_POP3_SERVER, - [SD_DHCP_LEASE_SMTP] = SD_DHCP_OPTION_SMTP_SERVER, - [SD_DHCP_LEASE_LPR] = SD_DHCP_OPTION_LPR_SERVER, - }; - - for (sd_dhcp_lease_server_type_t k = 0; k < _SD_DHCP_LEASE_SERVER_TYPE_MAX; k++) { - if (server->servers[k].size <= 0) - continue; - - r = dhcp_option_append( - &packet->dhcp, req->max_optlen, &offset, 0, - option_map[k], - sizeof(struct in_addr) * server->servers[k].size, - server->servers[k].addr); - if (r < 0) - return r; - } + for (sd_dhcp_lease_server_type_t k = 0; k < _SD_DHCP_LEASE_SERVER_TYPE_MAX; k++) { + if (server->servers[k].size <= 0) + continue; + r = dhcp_option_append( + &packet->dhcp, req->max_optlen, &offset, 0, + option_map[k], + sizeof(struct in_addr) * server->servers[k].size, + server->servers[k].addr); + if (r < 0) + return r; + } - if (server->timezone) { - r = dhcp_option_append( - &packet->dhcp, req->max_optlen, &offset, 0, - SD_DHCP_OPTION_TZDB_TIMEZONE, - strlen(server->timezone), server->timezone); - if (r < 0) - return r; - } + if (server->timezone) { + r = dhcp_option_append( + &packet->dhcp, req->max_optlen, &offset, 0, + SD_DHCP_OPTION_TZDB_TIMEZONE, + strlen(server->timezone), server->timezone); + if (r < 0) + return r; } ORDERED_SET_FOREACH(j, server->extra_options) { |