Merge pull request #14064 from yuwata/network-unify-send-option-and-send-raw-option

[thirdparty/systemd.git] / src / libsystemd-network / sd-dhcp-client.c

diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 550f614d0c729d7b9d8e5d2df66325c4cede02d9..901985fc1bb756bbdd22eba065179b4ef9f4fcf1 100644 (file)
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -8,7 +8,6 @@
 #include <net/if_arp.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 #include <sys/ioctl.h>
 #include <linux/if_infiniband.h>
 
@@ -35,14 +34,6 @@
 #define RESTART_AFTER_NAK_MIN_USEC (1 * USEC_PER_SEC)
 #define RESTART_AFTER_NAK_MAX_USEC (30 * USEC_PER_MINUTE)
 
-struct sd_dhcp_option {
-        unsigned n_ref;
-
-        uint8_t option;
-        void *data;
-        size_t length;
-};
-
 struct sd_dhcp_client {
         unsigned n_ref;
 
@@ -242,6 +233,7 @@ int sd_dhcp_client_set_mac(
 
         DHCP_CLIENT_DONT_DESTROY(client);
         bool need_restart = false;
+        int r;
 
         assert_return(client, -EINVAL);
         assert_return(addr, -EINVAL);
@@ -269,8 +261,11 @@ int sd_dhcp_client_set_mac(
         client->mac_addr_len = addr_len;
         client->arp_type = arp_type;
 
-        if (need_restart && client->state != DHCP_STATE_STOPPED)
-                sd_dhcp_client_start(client);
+        if (need_restart && client->state != DHCP_STATE_STOPPED) {
+                r = sd_dhcp_client_start(client);
+                if (r < 0)
+                        return log_dhcp_client_errno(client, r, "Failed to restart DHCPv4 client: %m");
+        }
 
         return 0;
 }
@@ -306,6 +301,7 @@ int sd_dhcp_client_set_client_id(
 
         DHCP_CLIENT_DONT_DESTROY(client);
         bool need_restart = false;
+        int r;
 
         assert_return(client, -EINVAL);
         assert_return(data, -EINVAL);
@@ -338,8 +334,11 @@ int sd_dhcp_client_set_client_id(
         memcpy(&client->client_id.raw.data, data, data_len);
         client->client_id_len = data_len + sizeof (client->client_id.type);
 
-        if (need_restart && client->state != DHCP_STATE_STOPPED)
-                sd_dhcp_client_start(client);
+        if (need_restart && client->state != DHCP_STATE_STOPPED) {
+                r = sd_dhcp_client_start(client);
+                if (r < 0)
+                        return log_dhcp_client_errno(client, r, "Failed to restart DHCPv4 client: %m");
+        }
 
         return 0;
 }
@@ -369,7 +368,7 @@ static int dhcp_client_set_iaid_duid_internal(
         if (duid) {
                 r = dhcp_validate_duid_len(duid_type, duid_len, true);
                 if (r < 0)
-                        return r;
+                        return log_dhcp_client_errno(client, r, "Failed to validate length of DUID: %m");
         }
 
         zero(client->client_id);
@@ -384,7 +383,7 @@ static int dhcp_client_set_iaid_duid_internal(
                                                      true,
                                                      &client->client_id.ns.iaid);
                         if (r < 0)
-                                return r;
+                                return log_dhcp_client_errno(client, r, "Failed to set IAID: %m");
                 }
         }
 
@@ -396,32 +395,32 @@ static int dhcp_client_set_iaid_duid_internal(
                 switch (duid_type) {
                 case DUID_TYPE_LLT:
                         if (client->mac_addr_len == 0)
-                                return -EOPNOTSUPP;
+                                return log_dhcp_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LLT, MAC address is not set.");
 
                         r = dhcp_identifier_set_duid_llt(&client->client_id.ns.duid, llt_time, client->mac_addr, client->mac_addr_len, client->arp_type, &len);
                         if (r < 0)
-                                return r;
+                                return log_dhcp_client_errno(client, r, "Failed to set DUID-LLT: %m");
                         break;
                 case DUID_TYPE_EN:
                         r = dhcp_identifier_set_duid_en(&client->client_id.ns.duid, &len);
                         if (r < 0)
-                                return r;
+                                return log_dhcp_client_errno(client, r, "Failed to set DUID-EN: %m");
                         break;
                 case DUID_TYPE_LL:
                         if (client->mac_addr_len == 0)
-                                return -EOPNOTSUPP;
+                                return log_dhcp_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LL, MAC address is not set.");
 
                         r = dhcp_identifier_set_duid_ll(&client->client_id.ns.duid, client->mac_addr, client->mac_addr_len, client->arp_type, &len);
                         if (r < 0)
-                                return r;
+                                return log_dhcp_client_errno(client, r, "Failed to set DUID-LL: %m");
                         break;
                 case DUID_TYPE_UUID:
                         r = dhcp_identifier_set_duid_uuid(&client->client_id.ns.duid, &len);
                         if (r < 0)
-                                return r;
+                                return log_dhcp_client_errno(client, r, "Failed to set DUID-UUID: %m");
                         break;
                 default:
-                        return -EINVAL;
+                        return log_dhcp_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "Invalid DUID type");
                 }
 
         client->client_id_len = sizeof(client->client_id.type) + len +
@@ -430,7 +429,9 @@ static int dhcp_client_set_iaid_duid_internal(
         if (!IN_SET(client->state, DHCP_STATE_INIT, DHCP_STATE_STOPPED)) {
                 log_dhcp_client(client, "Configured %sDUID, restarting.", iaid_append ? "IAID+" : "");
                 client_stop(client, SD_DHCP_CLIENT_EVENT_STOP);
-                sd_dhcp_client_start(client);
+                r = sd_dhcp_client_start(client);
+                if (r < 0)
+                        return log_dhcp_client_errno(client, r, "Failed to restart DHCPv4 client: %m");
         }
 
         return 0;
@@ -539,48 +540,6 @@ int sd_dhcp_client_set_max_attempts(sd_dhcp_client *client, uint64_t max_attempt
         return 0;
 }
 
-static sd_dhcp_option* dhcp_option_free(sd_dhcp_option *i) {
-        if (!i)
-                return NULL;
-
-        free(i->data);
-        return mfree(i);
-}
-
-int sd_dhcp_option_new(uint8_t option, void *data, size_t length, sd_dhcp_option **ret) {
-        _cleanup_(sd_dhcp_option_unrefp) sd_dhcp_option *p = NULL;
-        _cleanup_free_ void *q = NULL;
-
-        assert(ret);
-
-        q = memdup(data, length);
-        if (!q)
-                return -ENOMEM;
-
-        p = new(sd_dhcp_option, 1);
-        if (!p)
-                return -ENOMEM;
-
-        *p = (sd_dhcp_option) {
-                .n_ref = 1,
-                .option = option,
-                .length = length,
-                .data = TAKE_PTR(q),
-        };
-
-        *ret = TAKE_PTR(p);
-        return 0;
-}
-
-DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp_option, sd_dhcp_option, dhcp_option_free);
-DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(
-                dhcp_option_hash_ops,
-                void,
-                trivial_hash_func,
-                trivial_compare_func,
-                sd_dhcp_option,
-                sd_dhcp_option_unref);
-
 int sd_dhcp_client_set_dhcp_option(sd_dhcp_client *client, sd_dhcp_option *v) {
         int r;
 
@@ -878,7 +837,9 @@ static int client_send_discover(sd_dhcp_client *client) {
            address be assigned, and may include the ’IP address lease time’
            option to suggest the lease time it would like.
          */
-        if (client->last_addr != INADDR_ANY) {
+        /* RFC7844 section 3:
+           SHOULD NOT contain any other option. */
+        if (!client->anonymize && client->last_addr != INADDR_ANY) {
                 r = dhcp_option_append(&discover->dhcp, optlen, &optoffset, 0,
                                        SD_DHCP_OPTION_REQUESTED_IP_ADDRESS,
                                        4, &client->last_addr);
@@ -2050,7 +2011,8 @@ sd_event *sd_dhcp_client_get_event(sd_dhcp_client *client) {
 }
 
 static sd_dhcp_client *dhcp_client_free(sd_dhcp_client *client) {
-        assert(client);
+        if (!client)
+                return NULL;
 
         log_dhcp_client(client, "FREE");
 
@@ -2076,11 +2038,9 @@ static sd_dhcp_client *dhcp_client_free(sd_dhcp_client *client) {
 DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp_client, sd_dhcp_client, dhcp_client_free);
 
 int sd_dhcp_client_new(sd_dhcp_client **ret, int anonymize) {
-        _cleanup_(sd_dhcp_client_unrefp) sd_dhcp_client *client = NULL;
-
         assert_return(ret, -EINVAL);
 
-        client = new(sd_dhcp_client, 1);
+        _cleanup_(sd_dhcp_client_unrefp) sd_dhcp_client *client = new(sd_dhcp_client, 1);
         if (!client)
                 return -ENOMEM;