f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen#include <netinet/ether.h>

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen#include <linux/if.h>

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen#include "alloc-util.h"

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen#include "dhcp-lease-internal.h"

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen#include "hostname-util.h"

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen#include "network-internal.h"

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen#include "networkd-link.h"

1346b1f0388f4100bb3c2a2bb23bc881769c020cTom Gundersen

f5be560181d092c5f52a2b819aedcd48220f36abTom Gundersenstatic int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m,

dd43110f781a9245ec00531456fee68ed763a179Tom Gundersen void *userdata) {

5c1d3fc93d91384bbac29adf01074fa4375317eaUmut Tezduyar Lindskog _cleanup_link_unref_ Link *link = userdata;

4138fb2c7936758da709eaed3f6b4f3df1d04effPatrik Flykt int r;

4138fb2c7936758da709eaed3f6b4f3df1d04effPatrik Flykt

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen assert(link);

ce43e484465050c619ea9a1991d49b3d6215028bSusant Sahani assert(link->dhcp4_messages > 0);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen link->dhcp4_messages --;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = sd_netlink_message_get_errno(m);

06f021a8048583d66202e3ac5cd0a12386d33ac2Tom Gundersen if (r < 0 && r != -EEXIST) {

134e56dcc53970a20a858283650bb92cd5da1d17Lennart Poettering log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");

3b653205cf7bd3851befd0a9f6a3ded6e267c173Lennart Poettering link_enter_failed(link);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen }

aba496a58acf9d9c61314de71353550e579f85eeUmut Tezduyar Lindskog

4faefc7ff884eae65a80e82313fd9f4bb859d6dbLennart Poettering if (link->dhcp4_messages == 0) {

4faefc7ff884eae65a80e82313fd9f4bb859d6dbLennart Poettering link->dhcp4_configured = true;

aba496a58acf9d9c61314de71353550e579f85eeUmut Tezduyar Lindskog link_check_ready(link);

1a436809498faf6486815baa0338fb6b8e5def07Tom Gundersen }

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen return 1;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen}

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersenstatic int link_set_dhcp_routes(Link *link) {

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering struct in_addr gateway;

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta _cleanup_free_ sd_dhcp_route **static_routes = NULL;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen int r, n, i;

cb9fc36a1211967e8c58b0502a26c42552ac8060Lennart Poettering

769d324c99aab129148bd25f5f663ef441287d86Lennart Poettering assert(link);

769d324c99aab129148bd25f5f663ef441287d86Lennart Poettering assert(link->dhcp_lease);

769d324c99aab129148bd25f5f663ef441287d86Lennart Poettering

769d324c99aab129148bd25f5f663ef441287d86Lennart Poettering r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);

769d324c99aab129148bd25f5f663ef441287d86Lennart Poettering if (r < 0 && r != -ENODATA)

cb9fc36a1211967e8c58b0502a26c42552ac8060Lennart Poettering return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");

cb9fc36a1211967e8c58b0502a26c42552ac8060Lennart Poettering

cb9fc36a1211967e8c58b0502a26c42552ac8060Lennart Poettering if (r >= 0) {

ed942a9eb22d50f667909ad6184b45015d28d054Tom Gundersen struct in_addr address;

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen _cleanup_route_free_ Route *route = NULL;

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen _cleanup_route_free_ Route *route_gw = NULL;

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen if (r < 0)

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen r = route_new(&route);

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen if (r < 0)

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen return log_link_error_errno(link, r, "Could not allocate route: %m");

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen route->protocol = RTPROT_DHCP;

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen r = route_new(&route_gw);

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen if (r < 0)

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen return log_link_error_errno(link, r, "Could not allocate route: %m");

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen /* The dhcp netmask may mask out the gateway. Add an explicit

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta route_gw->family = AF_INET;

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta route_gw->dst.in = gateway;

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta route_gw->dst_prefixlen = 32;

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta route_gw->prefsrc.in = address;

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta route_gw->scope = RT_SCOPE_LINK;

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta route_gw->protocol = RTPROT_DHCP;

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta route_gw->priority = link->network->dhcp_route_metric;

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta r = route_configure(route_gw, link, &dhcp4_route_handler);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen if (r < 0)

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen return log_link_warning_errno(link, r, "Could not set host route: %m");

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen link->dhcp4_messages ++;

dbffab87f1504abc9f189dd253111693c99fbd9aTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen route->family = AF_INET;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen route->gw.in = gateway;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen route->prefsrc.in = address;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen route->priority = link->network->dhcp_route_metric;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = route_configure(route, link, &dhcp4_route_handler);

edb85f0d8d0a84f27308a3728f3fde3c52b9dce2Susant Sahani if (r < 0) {

edb85f0d8d0a84f27308a3728f3fde3c52b9dce2Susant Sahani log_link_warning_errno(link, r, "Could not set routes: %m");

2cc412b59353576cece2d5b30c6a39c70552f0a0Tom Gundersen link_enter_failed(link);

2cc412b59353576cece2d5b30c6a39c70552f0a0Tom Gundersen return r;

2cc412b59353576cece2d5b30c6a39c70552f0a0Tom Gundersen }

edbb03e95a3c31bf719d5c6c46eec14d0bcb9c8fTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen link->dhcp4_messages ++;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen }

1a436809498faf6486815baa0338fb6b8e5def07Tom Gundersen

1a436809498faf6486815baa0338fb6b8e5def07Tom Gundersen n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);

6a0a2f860f1ca4a10932da3b41dbc3c0139757ccTom Gundersen if (n == -ENODATA)

cb9fc36a1211967e8c58b0502a26c42552ac8060Lennart Poettering return 0;

5be4d38e31281727b6f45ae869136bb01a1f7790Tom Gundersen if (n < 0)

bcb7a07e0a785bda1eed658e984ff6b4a11cba9aTom Gundersen return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m");

4f882b2a5007e51032459e29d15a86df6b5ea9f4Tom Gundersen

1346b1f0388f4100bb3c2a2bb23bc881769c020cTom Gundersen for (i = 0; i < n; i++) {

ad0734e890b25751ef8229e47210ff11ae8fa3f3Tom Gundersen _cleanup_route_free_ Route *route = NULL;

4cc7a82c9490a3c5ae03b1d6d168ce40ba499e23Eugene Yakubovich

f5de5b00204f041aaec828d336c8afd9e860a5c3Tom Gundersen r = route_new(&route);

eb27aeca247a4cf8816fffc4c0dbcab55ead3864Tom Gundersen if (r < 0)

e1ea665edac17d75fce01b72dadfa3211b60df2cEugene Yakubovich return log_link_error_errno(link, r, "Could not allocate route: %m");

84b5b79a8f7b423c5b7cad4170eb68d57fe5e26cAngus Gibson

5c1d3fc93d91384bbac29adf01074fa4375317eaUmut Tezduyar Lindskog route->family = AF_INET;

bfa695b5cc37aeb78737c57c84e9e69ea08152c0Tom Gundersen route->protocol = RTPROT_DHCP;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);

dd43110f781a9245ec00531456fee68ed763a179Tom Gundersen assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);

dd43110f781a9245ec00531456fee68ed763a179Tom Gundersen assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);

e1853b00ef7cb56cafd908327dd44b3ab48b402cSusant Sahani route->priority = link->network->dhcp_route_metric;

e1853b00ef7cb56cafd908327dd44b3ab48b402cSusant Sahani

769d324c99aab129148bd25f5f663ef441287d86Lennart Poettering r = route_configure(route, link, &dhcp4_route_handler);

5a8bcb674f71a20e95df55319b34c556638378ceLennart Poettering if (r < 0)

5a8bcb674f71a20e95df55319b34c556638378ceLennart Poettering return log_link_warning_errno(link, r, "Could not set host route: %m");

c106cc36b9b8e8998eb95299b02f1db9c1209122Tom Gundersen

c106cc36b9b8e8998eb95299b02f1db9c1209122Tom Gundersen link->dhcp4_messages ++;

c106cc36b9b8e8998eb95299b02f1db9c1209122Tom Gundersen }

ce43e484465050c619ea9a1991d49b3d6215028bSusant Sahani

ce43e484465050c619ea9a1991d49b3d6215028bSusant Sahani return 0;

f048a16b464295a4e0a4f4c1210f06343ad31231Tom Gundersen}

f048a16b464295a4e0a4f4c1210f06343ad31231Tom Gundersen

b98b483bac585af754e8a22ea890db8486905d8aAlin Rautastatic int dhcp_lease_lost(Link *link) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen _cleanup_address_free_ Address *address = NULL;

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen struct in_addr addr;

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen struct in_addr netmask;

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta struct in_addr gateway;

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen unsigned prefixlen = 0;

67272d157a35e5cda4e5c904eafdcc23d20541d1Tom Gundersen int r;

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen

06f021a8048583d66202e3ac5cd0a12386d33ac2Tom Gundersen assert(link);

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen assert(link->dhcp_lease);

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen log_link_warning(link, "DHCP lease lost");

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen if (link->network->dhcp_use_routes) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen _cleanup_free_ sd_dhcp_route **routes = NULL;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen int n, i;

16aa63a00b5b1db23a9c0b8de350ebf482d90cd0Tom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering if (n >= 0) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen for (i = 0; i < n; i++) {

5c1d3fc93d91384bbac29adf01074fa4375317eaUmut Tezduyar Lindskog _cleanup_route_free_ Route *route = NULL;

81163121e649523b4071f67ddc03c2db649036c5Tom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = route_new(&route);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen if (r >= 0) {

eb0ea358b688a6f83ff305c6b825c61f12b6dcb8Tom Gundersen route->family = AF_INET;

aba496a58acf9d9c61314de71353550e579f85eeUmut Tezduyar Lindskog assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0);

8cd11a0f0f4ca05199e1166f6a07472b296f7455Tom Gundersen assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0);

5d3de3fe9cc452f1bfe3c2dcafecbd7f904da4dcLennart Poettering assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0);

c081882f07617e56bcbce54105068137e4e0bb52Susant Sahani

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen route_remove(route, link,

fd6d906cf46ecef45ebbb5a361e1dc436f031d7aLennart Poettering &link_route_remove_handler);

5a8bcb674f71a20e95df55319b34c556638378ceLennart Poettering }

3d3d425547a3f38473fcf8737b85dfebb630479dTom Gundersen }

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen }

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen }

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = address_new(&address);

16aa63a00b5b1db23a9c0b8de350ebf482d90cd0Tom Gundersen if (r >= 0) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering if (r >= 0) {

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen _cleanup_route_free_ Route *route_gw = NULL;

9e7e440835c43d81ffdbc299d2c07daaa641ed50Tom Gundersen _cleanup_route_free_ Route *route = NULL;

5c1d3fc93d91384bbac29adf01074fa4375317eaUmut Tezduyar Lindskog

5c1d3fc93d91384bbac29adf01074fa4375317eaUmut Tezduyar Lindskog r = route_new(&route_gw);

28cc555d8504c9429776aedbbe1fee7101258578Dan Williams if (r >= 0) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen route_gw->family = AF_INET;

5d3de3fe9cc452f1bfe3c2dcafecbd7f904da4dcLennart Poettering route_gw->dst.in = gateway;

5d3de3fe9cc452f1bfe3c2dcafecbd7f904da4dcLennart Poettering route_gw->dst_prefixlen = 32;

9e7e440835c43d81ffdbc299d2c07daaa641ed50Tom Gundersen route_gw->scope = RT_SCOPE_LINK;

46b0c76e2c355c0d0cc4792abb98cde07b28bc53Emil Renner Berthing

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen route_remove(route_gw, link,

3d3d425547a3f38473fcf8737b85dfebb630479dTom Gundersen &link_route_remove_handler);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen }

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering r = route_new(&route);

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering if (r >= 0) {

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering route->family = AF_INET;

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering route->gw.in = gateway;

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering route_remove(route, link,

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering &link_route_remove_handler);

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering }

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering }

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen if (r >= 0) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen if (r >= 0)

9c0a72f961e00b0447767973e7117e131bea5b5dTom Gundersen prefixlen = in_addr_netmask_to_prefixlen(&netmask);

1346b1f0388f4100bb3c2a2bb23bc881769c020cTom Gundersen

9c0a72f961e00b0447767973e7117e131bea5b5dTom Gundersen address->family = AF_INET;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen address->in_addr.in = addr;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen address->prefixlen = prefixlen;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen address_remove(address, link, &link_address_remove_handler);

6a24f1484fcc1f59f89617afbe4282667a358eabTom Gundersen }

6a24f1484fcc1f59f89617afbe4282667a358eabTom Gundersen }

bbf7c04821a71fec67eaf0e7a34d17afc5913c13Tom Gundersen

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen if (link->network->dhcp_use_mtu) {

bbf7c04821a71fec67eaf0e7a34d17afc5913c13Tom Gundersen uint16_t mtu;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

52433f6b65eccd1c54606dde999610640f3458acTom Gundersen r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu);

dbffab87f1504abc9f189dd253111693c99fbd9aTom Gundersen if (r >= 0 && link->original_mtu != mtu) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = link_set_mtu(link, link->original_mtu);

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering if (r < 0) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen log_link_warning(link,

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen "DHCP error: could not reset MTU");

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen link_enter_failed(link);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen return r;

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek }

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek }

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen }

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen if (link->network->dhcp_use_hostname) {

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen const char *hostname = NULL;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen if (link->network->dhcp_hostname)

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen hostname = link->network->dhcp_hostname;

8f203c166ecb24f904a068f2d8f0c636c1511a8fTom Gundersen else

a97dcc12e486ecff531809802930a26c4da827f2Tom Gundersen (void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);

a97dcc12e486ecff531809802930a26c4da827f2Tom Gundersen

02b59d57e0c08231645120077f651151f5bb2babTom Gundersen if (hostname) {

02b59d57e0c08231645120077f651151f5bb2babTom Gundersen /* If a hostname was set due to the lease, then unset it now. */

02b59d57e0c08231645120077f651151f5bb2babTom Gundersen r = link_set_hostname(link, NULL);

505f8da7325591defe5f751f328bd26915267602Tom Gundersen if (r < 0)

45af44d47da6933b260c734ad9ff721f63f80a4dTom Gundersen log_link_warning_errno(link, r, "Failed to reset transient hostname: %m");

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen }

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen }

bbf7c04821a71fec67eaf0e7a34d17afc5913c13Tom Gundersen

3bef724f7e7f7eaca69881548b06e221b77d7031Tom Gundersen link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering link_dirty(link);

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering link->dhcp4_configured = false;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen return 0;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen}

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersenstatic int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m,

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen void *userdata) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen _cleanup_link_unref_ Link *link = userdata;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen int r;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen assert(link);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = sd_netlink_message_get_errno(m);

dbffab87f1504abc9f189dd253111693c99fbd9aTom Gundersen if (r < 0 && r != -EEXIST) {

505f8da7325591defe5f751f328bd26915267602Tom Gundersen log_link_error_errno(link, r, "Could not set DHCPv4 address: %m");

505f8da7325591defe5f751f328bd26915267602Tom Gundersen link_enter_failed(link);

505f8da7325591defe5f751f328bd26915267602Tom Gundersen } else if (r >= 0)

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen manager_rtnl_process_address(rtnl, m, link->manager);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

69a93e7db47addc4495a6ec9dc0fc74092a6ebeeTom Gundersen link_set_dhcp_routes(link);

02b59d57e0c08231645120077f651151f5bb2babTom Gundersen

02b59d57e0c08231645120077f651151f5bb2babTom Gundersen return 1;

02b59d57e0c08231645120077f651151f5bb2babTom Gundersen}

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersenstatic int dhcp4_update_address(Link *link,

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen struct in_addr *address,

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen struct in_addr *netmask,

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen uint32_t lifetime) {

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen _cleanup_address_free_ Address *addr = NULL;

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen unsigned prefixlen;

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen int r;

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen assert(address);

6192b846ca0d15602e94ddb5da4420b7c60d64a5Tom Gundersen assert(netmask);

7951dea20911969287878e6897b3eca348721adeSusant Sahani assert(lifetime);

7951dea20911969287878e6897b3eca348721adeSusant Sahani

7951dea20911969287878e6897b3eca348721adeSusant Sahani prefixlen = in_addr_netmask_to_prefixlen(netmask);

7951dea20911969287878e6897b3eca348721adeSusant Sahani

7951dea20911969287878e6897b3eca348721adeSusant Sahani r = address_new(&addr);

7951dea20911969287878e6897b3eca348721adeSusant Sahani if (r < 0)

7951dea20911969287878e6897b3eca348721adeSusant Sahani return r;

7951dea20911969287878e6897b3eca348721adeSusant Sahani

7951dea20911969287878e6897b3eca348721adeSusant Sahani addr->family = AF_INET;

7951dea20911969287878e6897b3eca348721adeSusant Sahani addr->in_addr.in.s_addr = address->s_addr;

7951dea20911969287878e6897b3eca348721adeSusant Sahani addr->cinfo.ifa_prefered = lifetime;

7951dea20911969287878e6897b3eca348721adeSusant Sahani addr->cinfo.ifa_valid = lifetime;

7951dea20911969287878e6897b3eca348721adeSusant Sahani addr->prefixlen = prefixlen;

7951dea20911969287878e6897b3eca348721adeSusant Sahani addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr;

7951dea20911969287878e6897b3eca348721adeSusant Sahani

7951dea20911969287878e6897b3eca348721adeSusant Sahani /* allow reusing an existing address and simply update its lifetime

7951dea20911969287878e6897b3eca348721adeSusant Sahani r = address_configure(addr, link, &dhcp4_address_handler, true);

7951dea20911969287878e6897b3eca348721adeSusant Sahani if (r < 0)

7951dea20911969287878e6897b3eca348721adeSusant Sahani return r;

7951dea20911969287878e6897b3eca348721adeSusant Sahani

7951dea20911969287878e6897b3eca348721adeSusant Sahani return 0;

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani}

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahanistatic int dhcp_lease_renew(sd_dhcp_client *client, Link *link) {

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani sd_dhcp_lease *lease;

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani struct in_addr address;

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani struct in_addr netmask;

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani int r;

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani assert(link);

85a8eeee36b57c1ab382b0225fa9a87525bbeee9Susant Sahani assert(client);

02b59d57e0c08231645120077f651151f5bb2babTom Gundersen assert(link->network);

c0dda18697e0994272c0c9616d36f6777b60e2c7Tom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = sd_dhcp_client_get_lease(client, &lease);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen if (r < 0)

f048a16b464295a4e0a4f4c1210f06343ad31231Tom Gundersen return log_link_warning_errno(link, r, "DHCP error: no lease: %m");

28cc555d8504c9429776aedbbe1fee7101258578Dan Williams

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen sd_dhcp_lease_unref(link->dhcp_lease);

f882c247ad59776c3a7753bb963c1f8e2386cb79Tom Gundersen link->dhcp4_configured = false;

5c1d3fc93d91384bbac29adf01074fa4375317eaUmut Tezduyar Lindskog link->dhcp_lease = sd_dhcp_lease_ref(lease);

5c1d3fc93d91384bbac29adf01074fa4375317eaUmut Tezduyar Lindskog link_dirty(link);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = sd_dhcp_lease_get_address(lease, &address);

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen if (r < 0)

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen return log_link_warning_errno(link, r, "DHCP error: no address: %m");

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen

71a6151083d842b2f5bf04e50239f0bf85d34d2eTom Gundersen r = sd_dhcp_lease_get_netmask(lease, &netmask);

71a6151083d842b2f5bf04e50239f0bf85d34d2eTom Gundersen if (r < 0)

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen return log_link_warning_errno(link, r, "DHCP error: no netmask: %m");

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen if (!link->network->dhcp_critical) {

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen if (r < 0)

5d8e593dce074bff966fc0a46579c61b4f3bc33aSusant Sahani return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");

5d8e593dce074bff966fc0a46579c61b4f3bc33aSusant Sahani }

5d8e593dce074bff966fc0a46579c61b4f3bc33aSusant Sahani

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen r = dhcp4_update_address(link, &address, &netmask, lifetime);

f048a16b464295a4e0a4f4c1210f06343ad31231Tom Gundersen if (r < 0) {

f048a16b464295a4e0a4f4c1210f06343ad31231Tom Gundersen log_link_warning_errno(link, r, "Could not update IP address: %m");

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen link_enter_failed(link);

f882c247ad59776c3a7753bb963c1f8e2386cb79Tom Gundersen return r;

aba496a58acf9d9c61314de71353550e579f85eeUmut Tezduyar Lindskog }

407fe036a24834203aca6c1eec7d74d9ad3e9ee0Tom Gundersen

5a8bcb674f71a20e95df55319b34c556638378ceLennart Poettering return 0;

5a8bcb674f71a20e95df55319b34c556638378ceLennart Poettering}

9505d3c6deda0452c22ab2ed47bca74b98d87a17Tom Gundersen

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersenstatic int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen sd_dhcp_lease *lease;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen struct in_addr address;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen struct in_addr netmask;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen struct in_addr gateway;

71a6151083d842b2f5bf04e50239f0bf85d34d2eTom Gundersen unsigned prefixlen;

71a6151083d842b2f5bf04e50239f0bf85d34d2eTom Gundersen uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;

f579559b3a14c1f1ef96c372e7626c4733e6ef7dTom Gundersen int r;

eb0ea358b688a6f83ff305c6b825c61f12b6dcb8Tom Gundersen

eb0ea358b688a6f83ff305c6b825c61f12b6dcb8Tom Gundersen assert(client);

eb0ea358b688a6f83ff305c6b825c61f12b6dcb8Tom Gundersen assert(link);

eb0ea358b688a6f83ff305c6b825c61f12b6dcb8Tom Gundersen

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen r = sd_dhcp_client_get_lease(client, &lease);

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen if (r < 0)

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen return log_link_error_errno(link, r, "DHCP error: No lease: %m");

6ae115c1fe95611b39d2f20cfcea3d385429f59eTom Gundersen

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta r = sd_dhcp_lease_get_address(lease, &address);

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta if (r < 0)

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta return log_link_error_errno(link, r, "DHCP error: No address: %m");

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta r = sd_dhcp_lease_get_netmask(lease, &netmask);

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta if (r < 0)

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta return log_link_error_errno(link, r, "DHCP error: No netmask: %m");

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta prefixlen = in_addr_netmask_to_prefixlen(&netmask);

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta r = sd_dhcp_lease_get_router(lease, &gateway);

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta if (r < 0 && r != -ENODATA)

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m");

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta if (r >= 0)

b98b483bac585af754e8a22ea890db8486905d8aAlin Rauta log_struct(LOG_INFO,

ed942a9eb22d50f667909ad6184b45015d28d054Tom Gundersen LOG_LINK_INTERFACE(link),

ed942a9eb22d50f667909ad6184b45015d28d054Tom Gundersen LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",

ed942a9eb22d50f667909ad6184b45015d28d054Tom Gundersen ADDRESS_FMT_VAL(address),

ed942a9eb22d50f667909ad6184b45015d28d054Tom Gundersen prefixlen,

ed942a9eb22d50f667909ad6184b45015d28d054Tom Gundersen ADDRESS_FMT_VAL(gateway)),

ed942a9eb22d50f667909ad6184b45015d28d054Tom Gundersen "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen "PREFIXLEN=%u", prefixlen,

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway),

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen NULL);

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen else

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen log_struct(LOG_INFO,

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen LOG_LINK_INTERFACE(link),

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen ADDRESS_FMT_VAL(address),

bd8f65387673e29f46136a4ed172097035002c23Tom Gundersen prefixlen),

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering "PREFIXLEN=%u", prefixlen,

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering NULL);

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering link->dhcp_lease = sd_dhcp_lease_ref(lease);

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering link_dirty(link);

11bf3cced13c885ca215c108cb0bdb7a148520d6Lennart Poettering

cb9fc36a1211967e8c58b0502a26c42552ac8060Lennart Poettering if (link->network->dhcp_use_mtu) {

cb9fc36a1211967e8c58b0502a26c42552ac8060Lennart Poettering uint16_t mtu;

cb9fc36a1211967e8c58b0502a26c42552ac8060Lennart Poettering

769d324c99aab129148bd25f5f663ef441287d86Lennart Poettering r = sd_dhcp_lease_get_mtu(lease, &mtu);

769d324c99aab129148bd25f5f663ef441287d86Lennart Poettering if (r >= 0) {

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen r = link_set_mtu(link, mtu);

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen if (r < 0)

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen }

e331e24649213f2e093e16e4d3d64ee823dfc375Tom Gundersen }

if (link->network->dhcp_use_hostname) {

const char *hostname = NULL;

if (link->network->dhcp_hostname)

hostname = link->network->dhcp_hostname;

else

(void) sd_dhcp_lease_get_hostname(lease, &hostname);

if (hostname) {

r = link_set_hostname(link, hostname);

if (r < 0)

log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);

}

}

if (link->network->dhcp_use_timezone) {

const char *tz = NULL;

(void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);

if (tz) {

r = link_set_timezone(link, tz);

if (r < 0)

log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);

}

}

if (!link->network->dhcp_critical) {

r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);

if (r < 0) {

log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");

return r;

}

}

r = dhcp4_update_address(link, &address, &netmask, lifetime);

if (r < 0) {

log_link_warning_errno(link, r, "Could not update IP address: %m");

link_enter_failed(link);

return r;

}

return 0;

}

static void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) {

Link *link = userdata;

int r = 0;

assert(link);

assert(link->network);

assert(link->manager);

if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))

return;

switch (event) {

case SD_DHCP_CLIENT_EVENT_EXPIRED:

case SD_DHCP_CLIENT_EVENT_STOP:

case SD_DHCP_CLIENT_EVENT_IP_CHANGE:

if (link->network->dhcp_critical) {

log_link_error(link, "DHCPv4 connection considered system critical, ignoring request to reconfigure it.");

return;

}

if (link->dhcp_lease) {

r = dhcp_lease_lost(link);

if (r < 0) {

link_enter_failed(link);

return;

}

}

if (event == SD_DHCP_CLIENT_EVENT_IP_CHANGE) {

r = dhcp_lease_acquired(client, link);

if (r < 0) {

link_enter_failed(link);

return;

}

}

break;

case SD_DHCP_CLIENT_EVENT_RENEW:

r = dhcp_lease_renew(client, link);

if (r < 0) {

link_enter_failed(link);

return;

}

break;

case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE:

r = dhcp_lease_acquired(client, link);

if (r < 0) {

link_enter_failed(link);

return;

}

break;

default:

if (event < 0)

log_link_warning_errno(link, event, "DHCP error: Client failed: %m");

else

log_link_warning(link, "DHCP unknown event: %i", event);

break;

}

return;

}

int dhcp4_configure(Link *link) {

int r;

assert(link);

assert(link->network);

assert(link->network->dhcp & ADDRESS_FAMILY_IPV4);

if (!link->dhcp_client) {

r = sd_dhcp_client_new(&link->dhcp_client);

if (r < 0)

return r;

}

r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);

if (r < 0)

return r;

r = sd_dhcp_client_set_mac(link->dhcp_client,

(const uint8_t *) &link->mac,

sizeof (link->mac), ARPHRD_ETHER);

if (r < 0)

return r;

r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);

if (r < 0)

return r;

r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link);

if (r < 0)

return r;

r = sd_dhcp_client_set_request_broadcast(link->dhcp_client,

link->network->dhcp_broadcast);

if (r < 0)

return r;

if (link->mtu) {

r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);

if (r < 0)

return r;

}

if (link->network->dhcp_use_mtu) {

r = sd_dhcp_client_set_request_option(link->dhcp_client,

SD_DHCP_OPTION_INTERFACE_MTU);

if (r < 0)

return r;

}

if (link->network->dhcp_use_routes) {

r = sd_dhcp_client_set_request_option(link->dhcp_client,

SD_DHCP_OPTION_STATIC_ROUTE);

if (r < 0)

return r;

r = sd_dhcp_client_set_request_option(link->dhcp_client,

SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE);

if (r < 0)

return r;

}

/* Always acquire the timezone and NTP */

r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER);

if (r < 0)

return r;

r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE);

if (r < 0)

return r;

if (link->network->dhcp_send_hostname) {

_cleanup_free_ char *hostname = NULL;

const char *hn = NULL;

if (!link->network->dhcp_hostname) {

hostname = gethostname_malloc();

if (!hostname)

return -ENOMEM;

hn = hostname;

} else

hn = link->network->dhcp_hostname;

if (!is_localhost(hn)) {

r = sd_dhcp_client_set_hostname(link->dhcp_client, hn);

if (r < 0)

return r;

}

}

if (link->network->dhcp_vendor_class_identifier) {

r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,

link->network->dhcp_vendor_class_identifier);

if (r < 0)

return r;

}

switch (link->network->dhcp_client_identifier) {

case DHCP_CLIENT_ID_DUID:

/* Library defaults to this. */

break;

case DHCP_CLIENT_ID_MAC:

r = sd_dhcp_client_set_client_id(link->dhcp_client,

ARPHRD_ETHER,

(const uint8_t *) &link->mac,

sizeof (link->mac));

if (r < 0)

return r;

break;

default:

assert_not_reached("Unknown client identifier type.");

}

return 0;

}