1CURLMOPT_SOCKETDATA(3) curl_multi_setopt options CURLMOPT_SOCKETDATA(3)
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6 CURLMOPT_SOCKETDATA - custom pointer passed to the socket callback
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9 #include <curl/curl.h>
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11 CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_SOCKETDATA, void *pointer);
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14 A data pointer to pass to the socket callback set with the CURL‐
15 MOPT_SOCKETFUNCTION(3) option.
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17 This pointer will not be touched by libcurl but will only be passed in
18 to the socket callbacks's userp argument.
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21 NULL
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24 All
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27 static int sock_cb(CURL *e, curl_socket_t s, int what, void *cbp, void *sockp)
28 {
29 GlobalInfo *g = (GlobalInfo*) cbp;
30 SockInfo *fdp = (SockInfo*) sockp;
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32 if(what == CURL_POLL_REMOVE) {
33 remsock(fdp);
34 }
35 else {
36 if(!fdp) {
37 addsock(s, e, what, g);
38 }
39 else {
40 setsock(fdp, s, e, what, g);
41 }
42 }
43 return 0;
44 }
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46 main()
47 {
48 GlobalInfo setup;
49 /* ... use socket callback and custom pointer */
50 curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, sock_cb);
51 curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, &setup);
52 }
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55 Added in 7.15.4
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58 Returns CURLM_OK.
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61 CURLMOPT_SOCKETFUNCTION(3), curl_multi_socket_action(3), CURL‐
62 MOPT_TIMERFUNCTION(3)
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66libcurl 7.66.0 May 31, 2017 CURLMOPT_SOCKETDATA(3)