diff --git a/components/esp_netif/lwip/esp_netif_lwip.c b/components/esp_netif/lwip/esp_netif_lwip.c index 2d7ffb0ad2..69fdaf6d1f 100644 --- a/components/esp_netif/lwip/esp_netif_lwip.c +++ b/components/esp_netif/lwip/esp_netif_lwip.c @@ -1,5 +1,5 @@ /* - * SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD + * SPDX-FileCopyrightText: 2019-2023 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ @@ -2229,34 +2229,43 @@ esp_err_t esp_netif_dhcps_option_api(esp_netif_api_msg_t *msg) } case REQUESTED_IP_ADDRESS: { esp_netif_ip_info_t info; - uint32_t softap_ip = 0; + uint32_t server_ip = 0; uint32_t start_ip = 0; uint32_t end_ip = 0; + uint32_t range_start_ip = 0; + uint32_t range_end_ip = 0; dhcps_lease_t *poll = opt->val; if (poll->enable) { memset(&info, 0x00, sizeof(esp_netif_ip_info_t)); esp_netif_get_ip_info(esp_netif, &info); - softap_ip = htonl(info.ip.addr); + server_ip = htonl(info.ip.addr); + range_start_ip = server_ip & htonl(info.netmask.addr); + range_end_ip = range_start_ip | ~htonl(info.netmask.addr); + if (server_ip == range_start_ip || server_ip == range_end_ip) { + return ESP_ERR_ESP_NETIF_INVALID_PARAMS; + } start_ip = htonl(poll->start_ip.addr); end_ip = htonl(poll->end_ip.addr); /*config ip information can't contain local ip*/ - if ((start_ip <= softap_ip) && (softap_ip <= end_ip)) { + if ((server_ip >= start_ip) && (server_ip <= end_ip)) { return ESP_ERR_ESP_NETIF_INVALID_PARAMS; } - /*config ip information must be in the same segment as the local ip*/ - softap_ip >>= 8; - if ((start_ip >> 8 != softap_ip) - || (end_ip >> 8 != softap_ip)) { + if (start_ip <= range_start_ip || start_ip >= range_end_ip) { return ESP_ERR_ESP_NETIF_INVALID_PARAMS; } - - if (end_ip - start_ip > DHCPS_MAX_LEASE) { + if (end_ip <= range_start_ip || end_ip >= range_end_ip) { return ESP_ERR_ESP_NETIF_INVALID_PARAMS; } + /*The number of configured ip is less than DHCPS_MAX_LEASE*/ + if ((end_ip - start_ip + 1 > DHCPS_MAX_LEASE) || (start_ip >= end_ip)) { + return ESP_ERR_ESP_NETIF_INVALID_PARAMS; + } + } else { + return ESP_ERR_ESP_NETIF_INVALID_PARAMS; } memcpy(opt_info, opt->val, opt->len); diff --git a/components/lwip/apps/dhcpserver/dhcpserver.c b/components/lwip/apps/dhcpserver/dhcpserver.c index 43d518621e..349c33e391 100644 --- a/components/lwip/apps/dhcpserver/dhcpserver.c +++ b/components/lwip/apps/dhcpserver/dhcpserver.c @@ -1178,7 +1178,7 @@ static void dhcps_poll_set(dhcps_t *dhcps, u32_t ip) end_ip = htonl(dhcps_poll->end_ip.addr); /*config ip information can't contain local ip*/ - if ((start_ip <= server_ip) && (server_ip <= end_ip)) { + if ((server_ip >= start_ip) && (server_ip <= end_ip)) { dhcps_poll->enable = false; } else { /*config ip information must be in the same segment as the local ip*/ @@ -1211,6 +1211,7 @@ static void dhcps_poll_set(dhcps_t *dhcps, u32_t ip) dhcps_poll->end_ip.addr = range_end_ip; dhcps_poll->start_ip.addr = htonl(dhcps_poll->start_ip.addr); dhcps_poll->end_ip.addr = htonl(dhcps_poll->end_ip.addr); + dhcps_poll->enable = true; } }