terminal/screen: add color converter

[elogind.git] / src / libsystemd-network / sd-dhcp6-client.c

diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index c190b560eab01f698f65a1e35b5aea583be11fec..6ea68c915f60b50097293de9b83a13a1e592db7c 100644 (file)
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -39,6 +39,11 @@
 #define SYSTEMD_PEN 43793
 #define HASH_KEY SD_ID128_MAKE(80,11,8c,c2,fe,4a,03,ee,3e,d6,0c,6f,36,39,14,09)
 
+/* RFC 3315 section 9.1:
+ *      A DUID can be no more than 128 octets long (not including the type code).
+ */
+#define MAX_DUID_LEN 128
+
 struct sd_dhcp6_client {
         RefCount n_ref;
 
@@ -62,12 +67,33 @@ struct sd_dhcp6_client {
         sd_event_source *timeout_resend_expire;
         sd_dhcp6_client_cb_t cb;
         void *userdata;
-
-        struct duid_en {
-                uint16_t type; /* DHCP6_DUID_EN */
-                uint32_t pen;
-                uint8_t id[8];
-        } _packed_ duid;
+        union {
+                struct {
+                        uint16_t type; /* DHCP6_DUID_LLT */
+                        uint16_t htype;
+                        uint32_t time;
+                        uint8_t haddr[0];
+                } _packed_ llt;
+                struct {
+                        uint16_t type; /* DHCP6_DUID_EN */
+                        uint32_t pen;
+                        uint8_t id[8];
+                } _packed_ en;
+                struct {
+                        uint16_t type; /* DHCP6_DUID_LL */
+                        uint16_t htype;
+                        uint8_t haddr[0];
+                } _packed_ ll;
+                struct {
+                        uint16_t type; /* DHCP6_DUID_UUID */
+                        sd_id128_t uuid;
+                } _packed_ uuid;
+                struct {
+                        uint16_t type;
+                        uint8_t data[MAX_DUID_LEN];
+                } _packed_ raw;
+        } duid;
+        size_t duid_len;
 };
 
 static const uint16_t default_req_opts[] = {
@@ -147,6 +173,42 @@ int sd_dhcp6_client_set_mac(sd_dhcp6_client *client,
         return 0;
 }
 
+int sd_dhcp6_client_set_duid(sd_dhcp6_client *client, uint16_t type, uint8_t *duid,
+                             size_t duid_len)
+{
+        assert_return(client, -EINVAL);
+        assert_return(duid, -EINVAL);
+        assert_return(duid_len > 0 && duid_len <= MAX_DUID_LEN, -EINVAL);
+
+        switch (type) {
+        case DHCP6_DUID_LLT:
+                if (duid_len <= sizeof(client->duid.llt))
+                        return -EINVAL;
+                break;
+        case DHCP6_DUID_EN:
+                if (duid_len != sizeof(client->duid.en))
+                        return -EINVAL;
+                break;
+        case DHCP6_DUID_LL:
+                if (duid_len <= sizeof(client->duid.ll))
+                        return -EINVAL;
+                break;
+        case DHCP6_DUID_UUID:
+                if (duid_len != sizeof(client->duid.uuid))
+                        return -EINVAL;
+                break;
+        default:
+                /* accept unknown type in order to be forward compatible */
+                break;
+        }
+
+        client->duid.raw.type = htobe16(type);
+        memcpy(&client->duid.raw.data, duid, duid_len);
+        client->duid_len = duid_len;
+
+        return 0;
+}
+
 int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client,
                                        uint16_t option) {
         size_t t;
@@ -308,7 +370,7 @@ static int client_send_message(sd_dhcp6_client *client, usec_t time_now) {
                 return r;
 
         r = dhcp6_option_append(&opt, &optlen, DHCP6_OPTION_CLIENTID,
-                                sizeof(client->duid), &client->duid);
+                                client->duid_len, &client->duid);
         if (r < 0)
                 return r;
 
@@ -616,7 +678,7 @@ static int client_parse_message(sd_dhcp6_client *client,
                                 return -EINVAL;
                         }
 
-                        if (optlen != sizeof(client->duid) ||
+                        if (optlen != client->duid_len ||
                             memcmp(&client->duid, optval, optlen) != 0) {
                                 log_dhcp6_client(client, "%s DUID does not match",
                                                  dhcp6_message_type_to_string(message->type));
@@ -1138,8 +1200,9 @@ int sd_dhcp6_client_new(sd_dhcp6_client **ret)
         client->fd = -1;
 
         /* initialize DUID */
-        client->duid.type = htobe16(DHCP6_DUID_EN);
-        client->duid.pen = htobe32(SYSTEMD_PEN);
+        client->duid.en.type = htobe16(DHCP6_DUID_EN);
+        client->duid.en.pen = htobe32(SYSTEMD_PEN);
+        client->duid_len = sizeof(client->duid.en);
 
         r = sd_id128_get_machine(&machine_id);
         if (r < 0)
@@ -1147,8 +1210,7 @@ int sd_dhcp6_client_new(sd_dhcp6_client **ret)
 
         /* a bit of snake-oil perhaps, but no need to expose the machine-id
            directly */
-        siphash24(client->duid.id, &machine_id, sizeof(machine_id),
-                  HASH_KEY.bytes);
+        siphash24(client->duid.en.id, &machine_id, sizeof(machine_id), HASH_KEY.bytes);
 
         client->req_opts_len = ELEMENTSOF(default_req_opts);