293 static uint8_t *dhcpv4_encode_magic_cookie(uint8_t *buf, size_t *buflen)  in dhcpv4_encode_magic_cookie()  argument
295 	if (buf == NULL || *buflen < SIZE_OF_MAGIC_COOKIE) {  in dhcpv4_encode_magic_cookie()
301 	*buflen -= SIZE_OF_MAGIC_COOKIE;  in dhcpv4_encode_magic_cookie()
306 static uint8_t *dhcpv4_encode_ip_lease_time_option(uint8_t *buf, size_t *buflen,  in dhcpv4_encode_ip_lease_time_option()  argument
309 	if (buf == NULL || *buflen < DHCPV4_OPTIONS_IP_LEASE_TIME_SIZE) {  in dhcpv4_encode_ip_lease_time_option()
317 	*buflen -= DHCPV4_OPTIONS_IP_LEASE_TIME_SIZE;  in dhcpv4_encode_ip_lease_time_option()
322 static uint8_t *dhcpv4_encode_message_type_option(uint8_t *buf, size_t *buflen,  in dhcpv4_encode_message_type_option()  argument
325 	if (buf == NULL || *buflen < DHCPV4_OPTIONS_MSG_TYPE_SIZE) {  in dhcpv4_encode_message_type_option()
333 	*buflen -= DHCPV4_OPTIONS_MSG_TYPE_SIZE;  in dhcpv4_encode_message_type_option()
338 static uint8_t *dhcpv4_encode_server_id_option(uint8_t *buf, size_t *buflen,  in dhcpv4_encode_server_id_option()  argument
341 	if (buf == NULL || *buflen < DHCPV4_OPTIONS_SERVER_ID_SIZE) {  in dhcpv4_encode_server_id_option()
349 	*buflen -= DHCPV4_OPTIONS_SERVER_ID_SIZE;  in dhcpv4_encode_server_id_option()
354 static uint8_t *dhcpv4_encode_client_id_option(uint8_t *buf, size_t *buflen,  in dhcpv4_encode_client_id_option()  argument
357 	if (buf == NULL || *buflen < client_id->len + 2) {  in dhcpv4_encode_client_id_option()
365 	*buflen -= client_id->len + 2;  in dhcpv4_encode_client_id_option()
370 static uint8_t *dhcpv4_encode_subnet_mask_option(uint8_t *buf, size_t *buflen,  in dhcpv4_encode_subnet_mask_option()  argument
373 	if (buf == NULL || *buflen < DHCPV4_OPTIONS_SUBNET_MASK_SIZE) {  in dhcpv4_encode_subnet_mask_option()
381 	*buflen -= DHCPV4_OPTIONS_SUBNET_MASK_SIZE;  in dhcpv4_encode_subnet_mask_option()
386 static uint8_t *dhcpv4_encode_router_option(uint8_t *buf, size_t *buflen,  in dhcpv4_encode_router_option()  argument
389 	if (buf == NULL || *buflen < DHCPV4_OPTIONS_ROUTER_SIZE) {  in dhcpv4_encode_router_option()
397 	*buflen -= DHCPV4_OPTIONS_ROUTER_SIZE;  in dhcpv4_encode_router_option()
402 static uint8_t *dhcpv4_encode_dns_server_option(uint8_t *buf, size_t *buflen)  in dhcpv4_encode_dns_server_option()  argument
406 	if (buf == NULL || *buflen < DHCPV4_OPTIONS_DNS_SERVER_SIZE) {  in dhcpv4_encode_dns_server_option()
420 	*buflen -= DHCPV4_OPTIONS_DNS_SERVER_SIZE;  in dhcpv4_encode_dns_server_option()
425 static uint8_t *dhcpv4_encode_end_option(uint8_t *buf, size_t *buflen)  in dhcpv4_encode_end_option()  argument
427 	if (buf == NULL || *buflen < 1) {  in dhcpv4_encode_end_option()
433 	*buflen -= 1;  in dhcpv4_encode_end_option()
440 static uint8_t *dhcpv4_encode_header(uint8_t *buf, size_t *buflen,  in dhcpv4_encode_header()  argument
446 	if (buf == NULL || *buflen < sizeof(struct dhcp_msg)) {  in dhcpv4_encode_header()
467 	*buflen -= sizeof(struct dhcp_msg);  in dhcpv4_encode_header()
472 static uint8_t *dhcpv4_encode_string(uint8_t *buf, size_t *buflen, char *str,  in dhcpv4_encode_string()  argument
475 	if (buf == NULL || *buflen < max_len) {  in dhcpv4_encode_string()
488 	*buflen -= max_len;  in dhcpv4_encode_string()
493 static uint8_t *dhcpv4_encode_sname(uint8_t *buf, size_t *buflen, char *sname)  in dhcpv4_encode_sname()  argument
495 	return dhcpv4_encode_string(buf, buflen, sname, SIZE_OF_SNAME);  in dhcpv4_encode_sname()
498 static uint8_t *dhcpv4_encode_file(uint8_t *buf, size_t *buflen, char *file)  in dhcpv4_encode_file()  argument
500 	return dhcpv4_encode_string(buf, buflen, file, SIZE_OF_FILE);  in dhcpv4_encode_file()
504 				uint8_t *buf, size_t *buflen,  in dhcpv4_encode_requested_params()  argument
512 				buf, buflen, &ctx->netmask);  in dhcpv4_encode_requested_params()
520 				buf, buflen, &ctx->iface->config.ip.ipv4->gw);  in dhcpv4_encode_requested_params()
527 			buf = dhcpv4_encode_dns_server_option(buf, buflen);  in dhcpv4_encode_requested_params()
615 	size_t buflen = sizeof(reply);  in dhcpv4_send_offer()  local
619 	buf = dhcpv4_encode_header(buf, &buflen, msg, addr);  in dhcpv4_send_offer()
620 	buf = dhcpv4_encode_sname(buf, &buflen, NULL);  in dhcpv4_send_offer()
621 	buf = dhcpv4_encode_file(buf, &buflen, NULL);  in dhcpv4_send_offer()
622 	buf = dhcpv4_encode_magic_cookie(buf, &buflen);  in dhcpv4_send_offer()
623 	buf = dhcpv4_encode_ip_lease_time_option(buf, &buflen, lease_time);  in dhcpv4_send_offer()
624 	buf = dhcpv4_encode_message_type_option(buf, &buflen,  in dhcpv4_send_offer()
626 	buf = dhcpv4_encode_server_id_option(buf, &buflen, &ctx->server_addr);  in dhcpv4_send_offer()
627 	buf = dhcpv4_encode_client_id_option(buf, &buflen, client_id);  in dhcpv4_send_offer()
628 	buf = dhcpv4_encode_requested_params(buf, &buflen, ctx, params);  in dhcpv4_send_offer()
629 	buf = dhcpv4_encode_end_option(buf, &buflen);  in dhcpv4_send_offer()
636 	reply_len = sizeof(reply) - buflen;  in dhcpv4_send_offer()
656 	size_t buflen = sizeof(reply);  in dhcpv4_send_ack()  local
660 	buf = dhcpv4_encode_header(buf, &buflen, msg, inform ? NULL : addr);  in dhcpv4_send_ack()
661 	buf = dhcpv4_encode_sname(buf, &buflen, NULL);  in dhcpv4_send_ack()
662 	buf = dhcpv4_encode_file(buf, &buflen, NULL);  in dhcpv4_send_ack()
663 	buf = dhcpv4_encode_magic_cookie(buf, &buflen);  in dhcpv4_send_ack()
665 		buf = dhcpv4_encode_ip_lease_time_option(buf, &buflen, lease_time);  in dhcpv4_send_ack()
667 	buf = dhcpv4_encode_message_type_option(buf, &buflen,  in dhcpv4_send_ack()
669 	buf = dhcpv4_encode_server_id_option(buf, &buflen, &ctx->server_addr);  in dhcpv4_send_ack()
671 		buf = dhcpv4_encode_client_id_option(buf, &buflen, client_id);  in dhcpv4_send_ack()
673 	buf = dhcpv4_encode_requested_params(buf, &buflen, ctx, params);  in dhcpv4_send_ack()
674 	buf = dhcpv4_encode_end_option(buf, &buflen);  in dhcpv4_send_ack()
681 	reply_len = sizeof(reply) - buflen;  in dhcpv4_send_ack()
698 	size_t buflen = sizeof(reply);  in dhcpv4_send_nak()  local
702 	buf = dhcpv4_encode_header(buf, &buflen, msg, NULL);  in dhcpv4_send_nak()
703 	buf = dhcpv4_encode_sname(buf, &buflen, NULL);  in dhcpv4_send_nak()
704 	buf = dhcpv4_encode_file(buf, &buflen, NULL);  in dhcpv4_send_nak()
705 	buf = dhcpv4_encode_magic_cookie(buf, &buflen);  in dhcpv4_send_nak()
706 	buf = dhcpv4_encode_message_type_option(buf, &buflen,  in dhcpv4_send_nak()
708 	buf = dhcpv4_encode_server_id_option(buf, &buflen, &ctx->server_addr);  in dhcpv4_send_nak()
709 	buf = dhcpv4_encode_client_id_option(buf, &buflen, client_id);  in dhcpv4_send_nak()
710 	buf = dhcpv4_encode_end_option(buf, &buflen);  in dhcpv4_send_nak()
717 	reply_len = sizeof(reply) - buflen;  in dhcpv4_send_nak()