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CURLINFO_PRIMARY_IP(3) Library Functions Manual CURLINFO_PRIMARY_IP(3) NAME CURLINFO_PRIMARY_IP - IP address of last connection SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRIMARY_IP, char **ip); DESCRIPTION Pass a pointer to a char pointer to receive the pointer to a null-termi- nated string holding the IP address of the most recent connection done with this curl handle. This string may be IPv6 when that is enabled. Note that you get a pointer to a memory area that is reused at next request so you need to copy the string if you want to keep the information. The ip pointer is NULL or points to private memory. You must not free it. The memory gets freed automatically when you call curl_easy_cleanup(3) on the corresponding curl handle. PROTOCOLS This functionality affects all supported protocols EXAMPLE int main(void) { char *ip; CURLcode result; CURL *curl = curl_easy_init(); curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); /* Perform the transfer */ result = curl_easy_perform(curl); /* Check for errors */ if((result == CURLE_OK) && !curl_easy_getinfo(curl, CURLINFO_PRIMARY_IP, &ip) && ip) { printf("IP: %s\n", ip); } /* always cleanup */ curl_easy_cleanup(curl); } AVAILABILITY Added in curl 7.19.0 RETURN VALUE curl_easy_getinfo(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLINFO_LOCAL_IP(3), CURLINFO_LOCAL_PORT(3), CURLINFO_PRIMARY_PORT(3), curl_easy_getinfo(3), curl_easy_setopt(3) libcurl 2026-06-11 CURLINFO_PRIMARY_IP(3)
NAME | SYNOPSIS | DESCRIPTION | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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