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55 lines
1.5 KiB
Groff
55 lines
1.5 KiB
Groff
.\" generated by cd2nroff 0.1 from CURLOPT_SOCKOPTDATA.md
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.TH CURLOPT_SOCKOPTDATA 3 "2024-08-02" libcurl
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.SH NAME
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CURLOPT_SOCKOPTDATA \- pointer to pass to sockopt callback
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SOCKOPTDATA, void *pointer);
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.fi
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.SH DESCRIPTION
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Pass a \fIpointer\fP that is untouched by libcurl and passed as the first
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argument in the sockopt callback set with \fICURLOPT_SOCKOPTFUNCTION(3)\fP.
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.SH DEFAULT
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NULL
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.SH PROTOCOLS
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This functionality affects all supported protocols
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.SH EXAMPLE
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.nf
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static int sockopt_callback(void *clientp, curl_socket_t curlfd,
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curlsocktype purpose)
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{
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int val = *(int *)clientp;
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setsockopt((int)curlfd, SOL_SOCKET, SO_RCVBUF,
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(const char *)&val, sizeof(val));
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return CURL_SOCKOPT_OK;
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}
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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int recvbuffersize = 256 * 1024;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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/* call this function to set options for the socket */
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curl_easy_setopt(curl, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
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curl_easy_setopt(curl, CURLOPT_SOCKOPTDATA, &recvbuffersize);
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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.fi
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.SH AVAILABILITY
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Added in curl 7.16.0
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.SH RETURN VALUE
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Returns \fICURLE_OK\fP if the option is supported, and \fICURLE_UNKNOWN_OPTION\fP if not.
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.SH SEE ALSO
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.BR CURLOPT_OPENSOCKETFUNCTION (3),
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.BR CURLOPT_SOCKOPTFUNCTION (3)
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