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sd-dhcp-client: don't pass around 'secs'
The value is stored in the client object, so get it there when needed.
This commit is contained in:
Tom Gundersen
parent
d790d3f173
commit
6236f49b23
@ -222,11 +222,14 @@ static int client_stop(sd_dhcp_client *client, int error) {
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}
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static int client_message_init(sd_dhcp_client *client, DHCPMessage *message,
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uint8_t type, uint16_t secs, uint8_t **opt,
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size_t *optlen) {
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uint8_t type, uint8_t **opt, size_t *optlen) {
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int r;
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assert(secs);
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assert(client);
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assert(client->secs);
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assert(message);
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assert(opt);
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assert(optlen);
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r = dhcp_message_init(message, BOOTREQUEST, client->xid, type, opt,
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optlen);
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@ -235,7 +238,7 @@ static int client_message_init(sd_dhcp_client *client, DHCPMessage *message,
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/* Although 'secs' field is a SHOULD in RFC 2131, certain DHCP servers
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refuse to issue an DHCP lease if 'secs' is set to zero */
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message->secs = htobe16(secs);
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message->secs = htobe16(client->secs);
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memcpy(&message->chaddr, &client->client_id.mac_addr, ETH_ALEN);
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@ -284,51 +287,62 @@ static int dhcp_client_send_raw(sd_dhcp_client *client, DHCPPacket *packet,
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packet, len);
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}
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static int client_send_discover(sd_dhcp_client *client, uint16_t secs) {
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int err = 0;
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static int client_send_discover(sd_dhcp_client *client) {
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_cleanup_free_ DHCPPacket *discover;
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size_t optlen, len;
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uint8_t *opt;
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usec_t time_now;
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int r;
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assert(client);
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r = sd_event_get_now_monotonic(client->event, &time_now);
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if (r < 0)
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return r;
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assert(time_now >= client->start_time);
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/* seconds between sending first and last DISCOVER
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* must always be strictly positive to deal with broken servers */
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client->secs = ((time_now - client->start_time) / USEC_PER_SEC) ? : 1;
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optlen = DHCP_MIN_OPTIONS_SIZE;
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len = sizeof(DHCPPacket) + optlen;
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discover = malloc0(len);
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if (!discover)
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return -ENOMEM;
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err = client_message_init(client, &discover->dhcp, DHCP_DISCOVER,
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secs, &opt, &optlen);
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if (err < 0)
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return err;
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r = client_message_init(client, &discover->dhcp, DHCP_DISCOVER,
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&opt, &optlen);
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if (r < 0)
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return r;
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if (client->last_addr != INADDR_ANY) {
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err = dhcp_option_append(&opt, &optlen,
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r = dhcp_option_append(&opt, &optlen,
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DHCP_OPTION_REQUESTED_IP_ADDRESS,
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4, &client->last_addr);
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if (err < 0)
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return err;
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if (r < 0)
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return r;
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}
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err = dhcp_option_append(&opt, &optlen, DHCP_OPTION_END, 0, NULL);
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if (err < 0)
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return err;
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r = dhcp_option_append(&opt, &optlen, DHCP_OPTION_END, 0, NULL);
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if (r < 0)
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return r;
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err = dhcp_client_send_raw(client, discover, len - optlen);
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if (err < 0)
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return err;
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r = dhcp_client_send_raw(client, discover, len - optlen);
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if (r < 0)
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return r;
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log_dhcp_client(client, "DISCOVER");
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return 0;
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}
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static int client_send_request(sd_dhcp_client *client, uint16_t secs) {
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static int client_send_request(sd_dhcp_client *client) {
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_cleanup_free_ DHCPPacket *request;
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size_t optlen, len;
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int err;
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uint8_t *opt;
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int r;
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optlen = DHCP_MIN_OPTIONS_SIZE;
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len = sizeof(DHCPPacket) + optlen;
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@ -337,33 +351,33 @@ static int client_send_request(sd_dhcp_client *client, uint16_t secs) {
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if (!request)
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return -ENOMEM;
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err = client_message_init(client, &request->dhcp, DHCP_REQUEST, secs,
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&opt, &optlen);
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if (err < 0)
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return err;
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r = client_message_init(client, &request->dhcp, DHCP_REQUEST, &opt,
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&optlen);
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if (r < 0)
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return r;
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switch (client->state) {
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case DHCP_STATE_INIT_REBOOT:
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err = dhcp_option_append(&opt, &optlen,
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r = dhcp_option_append(&opt, &optlen,
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DHCP_OPTION_REQUESTED_IP_ADDRESS,
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4, &client->last_addr);
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if (err < 0)
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return err;
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if (r < 0)
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return r;
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break;
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case DHCP_STATE_REQUESTING:
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err = dhcp_option_append(&opt, &optlen,
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DHCP_OPTION_REQUESTED_IP_ADDRESS,
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4, &client->lease->address);
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if (err < 0)
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return err;
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r = dhcp_option_append(&opt, &optlen,
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DHCP_OPTION_REQUESTED_IP_ADDRESS,
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4, &client->lease->address);
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if (r < 0)
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return r;
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err = dhcp_option_append(&opt, &optlen,
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DHCP_OPTION_SERVER_IDENTIFIER,
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4, &client->lease->server_address);
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if (err < 0)
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return err;
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r = dhcp_option_append(&opt, &optlen,
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DHCP_OPTION_SERVER_IDENTIFIER,
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4, &client->lease->server_address);
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if (r < 0)
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return r;
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break;
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case DHCP_STATE_INIT:
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@ -376,34 +390,27 @@ static int client_send_request(sd_dhcp_client *client, uint16_t secs) {
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break;
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}
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err = dhcp_option_append(&opt, &optlen, DHCP_OPTION_END, 0, NULL);
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if (err < 0)
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return err;
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r = dhcp_option_append(&opt, &optlen, DHCP_OPTION_END, 0, NULL);
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if (r < 0)
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return r;
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if (client->state == DHCP_STATE_RENEWING) {
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err = dhcp_network_send_udp_socket(client->fd,
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client->lease->server_address,
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DHCP_PORT_SERVER,
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&request->dhcp,
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len - optlen - DHCP_IP_UDP_SIZE);
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r = dhcp_network_send_udp_socket(client->fd,
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client->lease->server_address,
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DHCP_PORT_SERVER,
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&request->dhcp,
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len - optlen - DHCP_IP_UDP_SIZE);
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} else {
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err = dhcp_client_send_raw(client, request, len - optlen);
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r = dhcp_client_send_raw(client, request, len - optlen);
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}
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if (err < 0)
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return err;
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if (r < 0)
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return r;
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log_dhcp_client(client, "REQUEST");
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return 0;
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}
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static uint16_t client_update_secs(sd_dhcp_client *client, usec_t time_now)
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{
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client->secs = ((time_now - client->start_time) / USEC_PER_SEC) ? : 1;
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return client->secs;
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}
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static int client_timeout_resend(sd_event_source *s, uint64_t usec,
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void *userdata) {
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sd_dhcp_client *client = userdata;
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@ -480,10 +487,7 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
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switch (client->state) {
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case DHCP_STATE_INIT:
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client_update_secs(client, time_now);
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r = client_send_discover(client, client->secs);
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r = client_send_discover(client);
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if (r >= 0) {
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client->state = DHCP_STATE_SELECTING;
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client->attempt = 1;
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@ -495,9 +499,7 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
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break;
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case DHCP_STATE_SELECTING:
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client_update_secs(client, time_now);
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r = client_send_discover(client, client->secs);
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r = client_send_discover(client);
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if (r < 0 && client->attempt >= 64)
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goto error;
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@ -507,7 +509,7 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
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case DHCP_STATE_REQUESTING:
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case DHCP_STATE_RENEWING:
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case DHCP_STATE_REBINDING:
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r = client_send_request(client, client->secs);
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r = client_send_request(client);
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if (r < 0 && client->attempt >= 64)
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goto error;
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