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Allow cross private range

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This commit is contained in:
Benjamin Wilson 2025-01-11 10:42:23 -05:00
parent db19c893df
commit b5c713b8b0
1 changed files with 26 additions and 20 deletions
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46
main/http_server/http_server.c
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@ -61,6 +61,30 @@ typedef struct rest_server_context
#define CHECK_FILE_EXTENSION(filename, ext) (strcasecmp(&filename[strlen(filename) - strlen(ext)], ext) == 0)
static esp_err_t ip_in_private_range(uint32_t ip){
//Private IP ranges (little endian, 192.168.0.0 => 0.0.168.192)
//192.168.0.0
uint32_t sixteen_bit_block = 0b00000000000000001010100011000000;
uint32_t sixteen_bit_mask = 0b00000000000000001111111111111111;
if((ip & sixteen_bit_mask) == sixteen_bit_block){
return ESP_OK;
}
//172.16.0.0
uint32_t twenty_bit_block = 0b00000000000000000001000010101100;
uint32_t twenty_bit_mask = 0b00000000000000001111000011111111;
if((ip & twenty_bit_mask) == twenty_bit_block){
return ESP_OK;
}
//10.0.0.0
uint32_t twenty_four_bit_block = 0b00000000000000000000000000001010;
uint32_t twenty_four_bit_mask = 0b00000000000000000000000011111111;
if((ip & twenty_four_bit_mask) == twenty_four_bit_block){
return ESP_OK;
}
return ESP_FAIL;
}
static esp_err_t check_is_same_network(httpd_req_t * req){
int sockfd = httpd_req_to_sockfd(req);
@ -121,27 +145,9 @@ static esp_err_t check_is_same_network(httpd_req_t * req){
}
//Private IP ranges (little endian, 192.168.0.0 => 0.0.168.192)
//192.168.0.0
uint32_t sixteen_bit_block = 0b00000000000000001010100011000000;
uint32_t sixteen_bit_mask = 0b00000000000000001111111111111111;
if((request_ip_addr & sixteen_bit_mask) == sixteen_bit_block && (origin_ip_addr & sixteen_bit_mask) == sixteen_bit_block){
return ESP_OK;
if(ip_in_private_range(origin_ip_addr) == ESP_OK && ip_in_private_range(request_ip_addr) == ESP_OK){
return ESP_OK;
}
//172.16.0.0
uint32_t twenty_bit_block = 0b00000000000000000001000010101100;
uint32_t twenty_bit_mask = 0b00000000000000001111000011111111;
if((request_ip_addr & twenty_bit_mask) == twenty_bit_block && (origin_ip_addr & twenty_bit_mask) == twenty_bit_block){
return ESP_OK;
}
//10.0.0.0
uint32_t twenty_four_bit_block = 0b00000000000000000000000000001010;
uint32_t twenty_four_bit_mask = 0b00000000000000000000000011111111;
if((request_ip_addr & twenty_four_bit_mask) == twenty_four_bit_block && (origin_ip_addr & twenty_four_bit_mask) == twenty_four_bit_block){
return ESP_OK;
}
ESP_LOGI(TAG, "Client is NOT in the private ip ranges or same range as server.");
return ESP_FAIL;