cleanup: remove the 'numsocks' argument used in many places

It was used (intended) to pass in the size of the 'socks' array that is
also passed to these functions, but was rarely actually checked/used and
the array is defined to a fixed size of MAX_SOCKSPEREASYHANDLE entries
that should be used instead.

Closes #4169

27 files changed, 88 insertions, 201 deletions

diff --git a/lib/asyn-ares.c b/lib/asyn-ares.c
index 6b14aa698..835cfa48f 100644
--- a/lib/asyn-ares.c
+++ b/lib/asyn-ares.c
@@ -253,16 +253,14 @@ static void destroy_async_data(struct Curl_async *async)
  */
 
 int Curl_resolver_getsock(struct connectdata *conn,
-                          curl_socket_t *socks,
-                          int numsocks)
-
+                          curl_socket_t *socks)
 {
   struct timeval maxtime;
   struct timeval timebuf;
   struct timeval *timeout;
   long milli;
   int max = ares_getsock((ares_channel)conn->data->state.resolver,
-                         (ares_socket_t *)socks, numsocks);
+                         (ares_socket_t *)socks, MAX_SOCKSPEREASYHANDLE);
 
   maxtime.tv_sec = CURL_TIMEOUT_RESOLVE;
   maxtime.tv_usec = 0;
diff --git a/lib/asyn-thread.c b/lib/asyn-thread.c
index e323cbe20..dcc2e8a9d 100755
--- a/lib/asyn-thread.c
+++ b/lib/asyn-thread.c
@@ -626,8 +626,7 @@ CURLcode Curl_resolver_is_resolved(struct connectdata *conn,
 }
 
 int Curl_resolver_getsock(struct connectdata *conn,
-                          curl_socket_t *socks,
-                          int numsocks)
+                          curl_socket_t *socks)
 {
   int ret_val = 0;
   time_t milli;
@@ -639,7 +638,6 @@ int Curl_resolver_getsock(struct connectdata *conn,
 #else
   (void)socks;
 #endif
-  (void)numsocks;
 
 #ifdef HAVE_SOCKETPAIR
   if(td) {
diff --git a/lib/asyn.h b/lib/asyn.h
index ccd4b1f7e..081c3fef0 100644
--- a/lib/asyn.h
+++ b/lib/asyn.h
@@ -114,8 +114,7 @@ void Curl_resolver_kill(struct connectdata *conn);
  * return bitmask indicating what file descriptors (referring to array indexes
  * in the 'sock' array) to wait for, read/write.
  */
-int Curl_resolver_getsock(struct connectdata *conn, curl_socket_t *sock,
-                          int numsocks);
+int Curl_resolver_getsock(struct connectdata *conn, curl_socket_t *sock);
 
 /*
  * Curl_resolver_is_resolved()
diff --git a/lib/doh.h b/lib/doh.h
index 34bfa6f2b..f522d3308 100644
--- a/lib/doh.h
+++ b/lib/doh.h
@@ -40,8 +40,7 @@ Curl_addrinfo *Curl_doh(struct connectdata *conn,
 CURLcode Curl_doh_is_resolved(struct connectdata *conn,
                               struct Curl_dns_entry **dns);
 
-int Curl_doh_getsock(struct connectdata *conn, curl_socket_t *socks,
-                     int numsocks);
+int Curl_doh_getsock(struct connectdata *conn, curl_socket_t *socks);
 
 typedef enum {
   DOH_OK,
diff --git a/lib/ftp.c b/lib/ftp.c
index 76ebbc44f..916efe6f8 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -132,10 +132,8 @@ static CURLcode ftp_connect(struct connectdata *conn, bool *done);
 static CURLcode ftp_disconnect(struct connectdata *conn, bool dead_connection);
 static CURLcode ftp_do_more(struct connectdata *conn, int *completed);
 static CURLcode ftp_multi_statemach(struct connectdata *conn, bool *done);
-static int ftp_getsock(struct connectdata *conn, curl_socket_t *socks,
-                       int numsocks);
-static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks,
-                              int numsocks);
+static int ftp_getsock(struct connectdata *conn, curl_socket_t *socks);
+static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks);
 static CURLcode ftp_doing(struct connectdata *conn,
                           bool *dophase_done);
 static CURLcode ftp_setup_connection(struct connectdata * conn);
@@ -810,21 +808,16 @@ static CURLcode ftp_state_pwd(struct connectdata *conn)
 
 /* For the FTP "protocol connect" and "doing" phases only */
 static int ftp_getsock(struct connectdata *conn,
-                       curl_socket_t *socks,
-                       int numsocks)
+                       curl_socket_t *socks)
 {
-  return Curl_pp_getsock(&conn->proto.ftpc.pp, socks, numsocks);
+  return Curl_pp_getsock(&conn->proto.ftpc.pp, socks);
 }
 
 /* For the FTP "DO_MORE" phase only */
-static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks,
-                              int numsocks)
+static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks)
 {
   struct ftp_conn *ftpc = &conn->proto.ftpc;
 
-  if(!numsocks)
-    return GETSOCK_BLANK;
-
   /* When in DO_MORE state, we could be either waiting for us to connect to a
    * remote site, or we could wait for that site to connect to us. Or just
    * handle ordinary commands.
@@ -856,7 +849,7 @@ static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks,
 
     return bits;
   }
-  return Curl_pp_getsock(&conn->proto.ftpc.pp, socks, numsocks);
+  return Curl_pp_getsock(&conn->proto.ftpc.pp, socks);
 }
 
 /* This is called after the FTP_QUOTE state is passed.
diff --git a/lib/hostip.c b/lib/hostip.c
index cf33ed8f4..5122070a0 100644
--- a/lib/hostip.c
+++ b/lib/hostip.c
@@ -1027,19 +1027,17 @@ CURLcode Curl_resolv_check(struct connectdata *conn,
 }
 
 int Curl_resolv_getsock(struct connectdata *conn,
-                        curl_socket_t *socks,
-                        int numsocks)
+                        curl_socket_t *socks)
 {
 #ifdef CURLRES_ASYNCH
   if(conn->data->set.doh)
     /* nothing to wait for during DOH resolve, those handles have their own
        sockets */
     return GETSOCK_BLANK;
-  return Curl_resolver_getsock(conn, socks, numsocks);
+  return Curl_resolver_getsock(conn, socks);
 #else
   (void)conn;
   (void)socks;
-  (void)numsocks;
   return GETSOCK_BLANK;
 #endif
 }
diff --git a/lib/hostip.h b/lib/hostip.h
index 1bda524be..6742e4d29 100644
--- a/lib/hostip.h
+++ b/lib/hostip.h
@@ -240,7 +240,6 @@ CURLcode Curl_loadhostpairs(struct Curl_easy *data);
 CURLcode Curl_resolv_check(struct connectdata *conn,
                            struct Curl_dns_entry **dns);
 int Curl_resolv_getsock(struct connectdata *conn,
-                        curl_socket_t *socks,
-                        int numsocks);
+                        curl_socket_t *socks);
 
 #endif /* HEADER_CURL_HOSTIP_H */
diff --git a/lib/http.c b/lib/http.c
index 065a26817..83180fb29 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -88,8 +88,7 @@
  */
 
 static int http_getsock_do(struct connectdata *conn,
-                           curl_socket_t *socks,
-                           int numsocks);
+                           curl_socket_t *socks);
 static int http_should_fail(struct connectdata *conn);
 
 #ifndef CURL_DISABLE_PROXY
@@ -99,8 +98,7 @@ static CURLcode add_haproxy_protocol_header(struct connectdata *conn);
 #ifdef USE_SSL
 static CURLcode https_connecting(struct connectdata *conn, bool *done);
 static int https_getsock(struct connectdata *conn,
-                         curl_socket_t *socks,
-                         int numsocks);
+                         curl_socket_t *socks);
 #else
 #define https_connecting(x,y) CURLE_COULDNT_CONNECT
 #endif
@@ -1509,11 +1507,9 @@ CURLcode Curl_http_connect(struct connectdata *conn, bool *done)
    interface and then we're always _sending_ a request and thus we wait for
    the single socket to become writable only */
 static int http_getsock_do(struct connectdata *conn,
-                           curl_socket_t *socks,
-                           int numsocks)
+                           curl_socket_t *socks)
 {
   /* write mode */
-  (void)numsocks; /* unused, we trust it to be at least 1 */
   socks[0] = conn->sock[FIRSTSOCKET];
   return GETSOCK_WRITESOCK(0);
 }
@@ -1585,11 +1581,10 @@ static CURLcode https_connecting(struct connectdata *conn, bool *done)
 }
 
 static int https_getsock(struct connectdata *conn,
-                         curl_socket_t *socks,
-                         int numsocks)
+                         curl_socket_t *socks)
 {
   if(conn->handler->flags & PROTOPT_SSL)
-    return Curl_ssl_getsock(conn, socks, numsocks);
+    return Curl_ssl_getsock(conn, socks);
   return GETSOCK_BLANK;
 }
 #endif /* USE_SSL */
diff --git a/lib/http2.c b/lib/http2.c
index 711263524..bfc0837b0 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -100,16 +100,11 @@ void Curl_http2_init_userset(struct UserDefined *set)
 }
 
 static int http2_perform_getsock(const struct connectdata *conn,
-                                 curl_socket_t *sock, /* points to
-                                                         numsocks
-                                                         number of
-                                                         sockets */
-                                 int numsocks)
+                                 curl_socket_t *sock)
 {
   const struct http_conn *c = &conn->proto.httpc;
   struct SingleRequest *k = &conn->data->req;
   int bitmap = GETSOCK_BLANK;
-  (void)numsocks;
 
   sock[0] = conn->sock[FIRSTSOCKET];
 
@@ -126,11 +121,9 @@ static int http2_perform_getsock(const struct connectdata *conn,
 }
 
 static int http2_getsock(struct connectdata *conn,
-                         curl_socket_t *sock, /* points to numsocks
-                                                 number of sockets */
-                         int numsocks)
+                         curl_socket_t *socks)
 {
-  return http2_perform_getsock(conn, sock, numsocks);
+  return http2_perform_getsock(conn, socks);
 }
 
 /*
diff --git a/lib/imap.c b/lib/imap.c
index f3ffa290b..ff9b62947 100644
--- a/lib/imap.c
+++ b/lib/imap.c
@@ -95,8 +95,7 @@ static CURLcode imap_done(struct connectdata *conn, CURLcode status,
 static CURLcode imap_connect(struct connectdata *conn, bool *done);
 static CURLcode imap_disconnect(struct connectdata *conn, bool dead);
 static CURLcode imap_multi_statemach(struct connectdata *conn, bool *done);
-static int imap_getsock(struct connectdata *conn, curl_socket_t *socks,
-                        int numsocks);
+static int imap_getsock(struct connectdata *conn, curl_socket_t *socks);
 static CURLcode imap_doing(struct connectdata *conn, bool *dophase_done);
 static CURLcode imap_setup_connection(struct connectdata *conn);
 static char *imap_atom(const char *str, bool escape_only);
@@ -1392,10 +1391,9 @@ static CURLcode imap_init(struct connectdata *conn)
 }
 
 /* For the IMAP "protocol connect" and "doing" phases only */
-static int imap_getsock(struct connectdata *conn, curl_socket_t *socks,
-                        int numsocks)
+static int imap_getsock(struct connectdata *conn, curl_socket_t *socks)
 {
-  return Curl_pp_getsock(&conn->proto.imapc.pp, socks, numsocks);
+  return Curl_pp_getsock(&conn->proto.imapc.pp, socks);
 }
 
 /***********************************************************************
diff --git a/lib/multi.c b/lib/multi.c
index a9fd1f8b6..9b6801db7 100755
--- a/lib/multi.c
+++ b/lib/multi.c
@@ -818,19 +818,15 @@ void Curl_attach_connnection(struct Curl_easy *data,
 }
 
 static int waitconnect_getsock(struct connectdata *conn,
-                               curl_socket_t *sock,
-                               int numsocks)
+                               curl_socket_t *sock)
 {
   int i;
   int s = 0;
   int rc = 0;
 
-  if(!numsocks)
-    return GETSOCK_BLANK;
-
 #ifdef USE_SSL
   if(CONNECT_FIRSTSOCKET_PROXY_SSL())
-    return Curl_ssl_getsock(conn, sock, numsocks);
+    return Curl_ssl_getsock(conn, sock);
 #endif
 
   for(i = 0; i<2; i++) {
@@ -844,12 +840,8 @@ static int waitconnect_getsock(struct connectdata *conn,
 }
 
 static int waitproxyconnect_getsock(struct connectdata *conn,
-                                    curl_socket_t *sock,
-                                    int numsocks)
+                                    curl_socket_t *sock)
 {
-  if(!numsocks)
-    return GETSOCK_BLANK;
-
   sock[0] = conn->sock[FIRSTSOCKET];
 
   /* when we've sent a CONNECT to a proxy, we should rather wait for the
@@ -861,19 +853,17 @@ static int waitproxyconnect_getsock(struct connectdata *conn,
 }
 
 static int domore_getsock(struct connectdata *conn,
-                          curl_socket_t *socks,
-                          int numsocks)
+                          curl_socket_t *socks)
 {
   if(conn && conn->handler->domore_getsock)
-    return conn->handler->domore_getsock(conn, socks, numsocks);
+    return conn->handler->domore_getsock(conn, socks);
   return GETSOCK_BLANK;
 }
 
-/* returns bitmapped flags for this handle and its sockets */
+/* returns bitmapped flags for this handle and its sockets. The 'socks[]'
+   array contains MAX_SOCKSPEREASYHANDLE entries. */
 static int multi_getsock(struct Curl_easy *data,
-                         curl_socket_t *socks, /* points to numsocks number
-                                                  of sockets */
-                         int numsocks)
+                         curl_socket_t *socks)
 {
   /* The no connection case can happen when this is called from
      curl_multi_remove_handle() => singlesocket() => multi_getsock().
@@ -905,30 +895,30 @@ static int multi_getsock(struct Curl_easy *data,
     return 0;
 
   case CURLM_STATE_WAITRESOLVE:
-    return Curl_resolv_getsock(data->conn, socks, numsocks);
+    return Curl_resolv_getsock(data->conn, socks);
 
   case CURLM_STATE_PROTOCONNECT:
   case CURLM_STATE_SENDPROTOCONNECT:
-    return Curl_protocol_getsock(data->conn, socks, numsocks);
+    return Curl_protocol_getsock(data->conn, socks);
 
   case CURLM_STATE_DO:
   case CURLM_STATE_DOING:
-    return Curl_doing_getsock(data->conn, socks, numsocks);
+    return Curl_doing_getsock(data->conn, socks);
 
   case CURLM_STATE_WAITPROXYCONNECT:
-    return waitproxyconnect_getsock(data->conn, socks, numsocks);
+    return waitproxyconnect_getsock(data->conn, socks);
 
   case CURLM_STATE_WAITCONNECT:
-    return waitconnect_getsock(data->conn, socks, numsocks);
+    return waitconnect_getsock(data->conn, socks);
 
   case CURLM_STATE_DO_MORE:
-    return domore_getsock(data->conn, socks, numsocks);
+    return domore_getsock(data->conn, socks);
 
   case CURLM_STATE_DO_DONE: /* since is set after DO is completed, we switch
                                to waiting for the same as the *PERFORM
                                states */
   case CURLM_STATE_PERFORM:
-    return Curl_single_getsock(data->conn, socks, numsocks);
+    return Curl_single_getsock(data->conn, socks);
   }
 
 }
@@ -954,7 +944,7 @@ CURLMcode curl_multi_fdset(struct Curl_multi *multi,
 
   data = multi->easyp;
   while(data) {
-    int bitmap = multi_getsock(data, sockbunch, MAX_SOCKSPEREASYHANDLE);
+    int bitmap = multi_getsock(data, sockbunch);
 
     for(i = 0; i< MAX_SOCKSPEREASYHANDLE; i++) {
       curl_socket_t s = CURL_SOCKET_BAD;
@@ -1015,7 +1005,7 @@ CURLMcode Curl_multi_wait(struct Curl_multi *multi,
   /* Count up how many fds we have from the multi handle */
   data = multi->easyp;
   while(data) {
-    bitmap = multi_getsock(data, sockbunch, MAX_SOCKSPEREASYHANDLE);
+    bitmap = multi_getsock(data, sockbunch);
 
     for(i = 0; i< MAX_SOCKSPEREASYHANDLE; i++) {
       curl_socket_t s = CURL_SOCKET_BAD;
@@ -1065,7 +1055,7 @@ CURLMcode Curl_multi_wait(struct Curl_multi *multi,
     /* Add the curl handles to our pollfds first */
     data = multi->easyp;
     while(data) {
-      bitmap = multi_getsock(data, sockbunch, MAX_SOCKSPEREASYHANDLE);
+      bitmap = multi_getsock(data, sockbunch);
 
       for(i = 0; i< MAX_SOCKSPEREASYHANDLE; i++) {
         curl_socket_t s = CURL_SOCKET_BAD;
@@ -2236,7 +2226,7 @@ static CURLMcode singlesocket(struct Curl_multi *multi,
 
   /* Fill in the 'current' struct with the state as it is now: what sockets to
      supervise and for what actions */
-  curraction = multi_getsock(data, socks, MAX_SOCKSPEREASYHANDLE);
+  curraction = multi_getsock(data, socks);
 
   /* We have 0 .. N sockets already and we get to know about the 0 .. M
      sockets we should have from now on. Detect the differences, remove no
diff --git a/lib/pingpong.c b/lib/pingpong.c
index e9568ee3d..76783d41e 100644
--- a/lib/pingpong.c
+++ b/lib/pingpong.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -463,14 +463,9 @@ CURLcode Curl_pp_readresp(curl_socket_t sockfd,
 }
 
 int Curl_pp_getsock(struct pingpong *pp,
-                    curl_socket_t *socks,
-                    int numsocks)
+                    curl_socket_t *socks)
 {
   struct connectdata *conn = pp->conn;
-
-  if(!numsocks)
-    return GETSOCK_BLANK;
-
   socks[0] = conn->sock[FIRSTSOCKET];
 
   if(pp->sendleft) {
diff --git a/lib/pingpong.h b/lib/pingpong.h
index dbe1f8d3d..849a7c0ff 100644
--- a/lib/pingpong.h
+++ b/lib/pingpong.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -135,8 +135,7 @@ CURLcode Curl_pp_flushsend(struct pingpong *pp);
 /* call this when a pingpong connection is disconnected */
 CURLcode Curl_pp_disconnect(struct pingpong *pp);
 
-int Curl_pp_getsock(struct pingpong *pp, curl_socket_t *socks,
-                    int numsocks);
+int Curl_pp_getsock(struct pingpong *pp, curl_socket_t *socks);
 
 
 /***********************************************************************
diff --git a/lib/pop3.c b/lib/pop3.c
index a681d5213..57c1373aa 100644
--- a/lib/pop3.c
+++ b/lib/pop3.c
@@ -95,8 +95,7 @@ static CURLcode pop3_done(struct connectdata *conn, CURLcode status,
 static CURLcode pop3_connect(struct connectdata *conn, bool *done);
 static CURLcode pop3_disconnect(struct connectdata *conn, bool dead);
 static CURLcode pop3_multi_statemach(struct connectdata *conn, bool *done);
-static int pop3_getsock(struct connectdata *conn, curl_socket_t *socks,
-                        int numsocks);
+static int pop3_getsock(struct connectdata *conn, curl_socket_t *socks);
 static CURLcode pop3_doing(struct connectdata *conn, bool *dophase_done);
 static CURLcode pop3_setup_connection(struct connectdata *conn);
 static CURLcode pop3_parse_url_options(struct connectdata *conn);
@@ -1055,10 +1054,9 @@ static CURLcode pop3_init(struct connectdata *conn)
 }
 
 /* For the POP3 "protocol connect" and "doing" phases only */
-static int pop3_getsock(struct connectdata *conn, curl_socket_t *socks,
-                        int numsocks)
+static int pop3_getsock(struct connectdata *conn, curl_socket_t *socks)
 {
-  return Curl_pp_getsock(&conn->proto.pop3c.pp, socks, numsocks);
+  return Curl_pp_getsock(&conn->proto.pop3c.pp, socks);
 }
 
 /***********************************************************************
diff --git a/lib/rtsp.c b/lib/rtsp.c
index 25e194a23..bba4c16a1 100644
--- a/lib/rtsp.c
+++ b/lib/rtsp.c
@@ -52,10 +52,7 @@ static CURLcode rtsp_do(struct connectdata *conn, bool *done);
 static CURLcode rtsp_done(struct connectdata *conn, CURLcode, bool premature);
 static CURLcode rtsp_connect(struct connectdata *conn, bool *done);
 static CURLcode rtsp_disconnect(struct connectdata *conn, bool dead);
-
-static int rtsp_getsock_do(struct connectdata *conn,
-                           curl_socket_t *socks,
-                           int numsocks);
+static int rtsp_getsock_do(struct connectdata *conn, curl_socket_t *socks);
 
 /*
  * Parse and write out any available RTP data.
@@ -77,11 +74,9 @@ static unsigned int rtsp_conncheck(struct connectdata *check,
    interface and then we're always _sending_ a request and thus we wait for
    the single socket to become writable only */
 static int rtsp_getsock_do(struct connectdata *conn,
-                           curl_socket_t *socks,
-                           int numsocks)
+                           curl_socket_t *socks)
 {
   /* write mode */
-  (void)numsocks; /* unused, we trust it to be at least 1 */
   socks[0] = conn->sock[FIRSTSOCKET];
   return GETSOCK_WRITESOCK(0);
 }
diff --git a/lib/smb.c b/lib/smb.c
index 870244cb7..2703520a6 100644
--- a/lib/smb.c
+++ b/lib/smb.c
@@ -6,7 +6,7 @@
  *                             \___|\___/|_| \_\_____|
  *
  * Copyright (C) 2014, Bill Nagel <wnagel@tycoint.com>, Exacq Technologies
- * Copyright (C) 2016-2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2016-2019, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -64,8 +64,7 @@ static CURLcode smb_request_state(struct connectdata *conn, bool *done);
 static CURLcode smb_done(struct connectdata *conn, CURLcode status,
                          bool premature);
 static CURLcode smb_disconnect(struct connectdata *conn, bool dead);
-static int smb_getsock(struct connectdata *conn, curl_socket_t *socks,
-                       int numsocks);
+static int smb_getsock(struct connectdata *conn, curl_socket_t *socks);
 static CURLcode smb_parse_url_path(struct connectdata *conn);
 
 /*
@@ -936,12 +935,8 @@ static CURLcode smb_disconnect(struct connectdata *conn, bool dead)
   return CURLE_OK;
 }
 
-static int smb_getsock(struct connectdata *conn, curl_socket_t *socks,
-                       int numsocks)
+static int smb_getsock(struct connectdata *conn, curl_socket_t *socks)
 {
-  if(!numsocks)
-    return GETSOCK_BLANK;
-
   socks[0] = conn->sock[FIRSTSOCKET];
   return GETSOCK_READSOCK(0) | GETSOCK_WRITESOCK(0);
 }
diff --git a/lib/smtp.c b/lib/smtp.c
index e10d0fbfc..0db3c1e1c 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -95,8 +95,7 @@ static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
 static CURLcode smtp_connect(struct connectdata *conn, bool *done);
 static CURLcode smtp_disconnect(struct connectdata *conn, bool dead);
 static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done);
-static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
-                        int numsocks);
+static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks);
 static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done);
 static CURLcode smtp_setup_connection(struct connectdata *conn);
 static CURLcode smtp_parse_url_options(struct connectdata *conn);
@@ -1114,10 +1113,9 @@ static CURLcode smtp_init(struct connectdata *conn)
 }
 
 /* For the SMTP "protocol connect" and "doing" phases only */
-static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
-                        int numsocks)
+static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks)
 {
-  return Curl_pp_getsock(&conn->proto.smtpc.pp, socks, numsocks);
+  return Curl_pp_getsock(&conn->proto.smtpc.pp, socks);
 }
 
 /***********************************************************************
diff --git a/lib/ssh-libssh.c b/lib/ssh-libssh.c
index 879358eba..4b34b0212 100644
--- a/lib/ssh-libssh.c
+++ b/lib/ssh-libssh.c
@@ -126,13 +126,9 @@ CURLcode sftp_perform(struct connectdata *conn,
 
 static void sftp_quote(struct connectdata *conn);
 static void sftp_quote_stat(struct connectdata *conn);
-
-static int myssh_getsock(struct connectdata *conn, curl_socket_t *sock,
-                         int numsocks);
-
+static int myssh_getsock(struct connectdata *conn, curl_socket_t *sock);
 static int myssh_perform_getsock(const struct connectdata *conn,
-                                 curl_socket_t *sock,
-                                 int numsocks);
+                                 curl_socket_t *sock);
 
 static CURLcode myssh_setup_connection(struct connectdata *conn);
 
@@ -1913,13 +1909,9 @@ static CURLcode myssh_statemach_act(struct connectdata *conn, bool *block)
 /* called by the multi interface to figure out what socket(s) to wait for and
    for what actions in the DO_DONE, PERFORM and WAITPERFORM states */
 static int myssh_perform_getsock(const struct connectdata *conn,
-                                 curl_socket_t *sock,  /* points to numsocks
-                                                          number of sockets */
-                                 int numsocks)
+                                 curl_socket_t *sock)
 {
   int bitmap = GETSOCK_BLANK;
-  (void) numsocks;
-
   sock[0] = conn->sock[FIRSTSOCKET];
 
   if(conn->waitfor & KEEP_RECV)
@@ -1934,13 +1926,11 @@ static int myssh_perform_getsock(const struct connectdata *conn,
 /* Generic function called by the multi interface to figure out what socket(s)
    to wait for and for what actions during the DOING and PROTOCONNECT states*/
 static int myssh_getsock(struct connectdata *conn,
-                         curl_socket_t *sock,  /* points to numsocks
-                                                   number of sockets */
-                         int numsocks)
+                         curl_socket_t *sock)
 {
   /* if we know the direction we can use the generic *_getsock() function even
      for the protocol_connect and doing states */
-  return myssh_perform_getsock(conn, sock, numsocks);
+  return myssh_perform_getsock(conn, sock);
 }
 
 static void myssh_block2waitfor(struct connectdata *conn, bool block)
diff --git a/lib/ssh.c b/lib/ssh.c
index a265c3c9a..5dd6ee29e 100644
--- a/lib/ssh.c
+++ b/lib/ssh.c
@@ -125,17 +125,9 @@ static
 CURLcode sftp_perform(struct connectdata *conn,
                       bool *connected,
                       bool *dophase_done);
-
-static int ssh_getsock(struct connectdata *conn,
-                       curl_socket_t *sock, /* points to numsocks number
-                                               of sockets */
-                       int numsocks);
-
+static int ssh_getsock(struct connectdata *conn, curl_socket_t *sock);
 static int ssh_perform_getsock(const struct connectdata *conn,
-                               curl_socket_t *sock, /* points to numsocks
-                                                       number of sockets */
-                               int numsocks);
-
+                               curl_socket_t *sock);
 static CURLcode ssh_setup_connection(struct connectdata *conn);
 
 /*
@@ -2700,13 +2692,10 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
 /* called by the multi interface to figure out what socket(s) to wait for and
    for what actions in the DO_DONE, PERFORM and WAITPERFORM states */
 static int ssh_perform_getsock(const struct connectdata *conn,
-                               curl_socket_t *sock, /* points to numsocks
-                                                       number of sockets */
-                               int numsocks)
+                               curl_socket_t *sock)
 {
 #ifdef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
   int bitmap = GETSOCK_BLANK;
-  (void)numsocks;
 
   sock[0] = conn->sock[FIRSTSOCKET];
 
@@ -2720,28 +2709,25 @@ static int ssh_perform_getsock(const struct connectdata *conn,
 #else
   /* if we don't know the direction we can use the generic *_getsock()
      function even for the protocol_connect and doing states */
-  return Curl_single_getsock(conn, sock, numsocks);
+  return Curl_single_getsock(conn, sock);
 #endif
 }
 
 /* Generic function called by the multi interface to figure out what socket(s)
    to wait for and for what actions during the DOING and PROTOCONNECT states*/
 static int ssh_getsock(struct connectdata *conn,
-                       curl_socket_t *sock, /* points to numsocks number
-                                               of sockets */
-                       int numsocks)
+                       curl_socket_t *sock)
 {
 #ifndef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
   (void)conn;
   (void)sock;
-  (void)numsocks;
   /* if we don't know any direction we can just play along as we used to and
      not provide any sensible info */
   return GETSOCK_BLANK;
 #else
   /* if we know the direction we can use the generic *_getsock() function even
      for the protocol_connect and doing states */
-  return ssh_perform_getsock(conn, sock, numsocks);
+  return ssh_perform_getsock(conn, sock);
 #endif
 }
 
diff --git a/lib/tftp.c b/lib/tftp.c
index c71e5f0aa..2b8084d25 100644
--- a/lib/tftp.c
+++ b/lib/tftp.c
@@ -157,8 +157,7 @@ static CURLcode tftp_done(struct connectdata *conn,
 static CURLcode tftp_setup_connection(struct connectdata * conn);
 static CURLcode tftp_multi_statemach(struct connectdata *conn, bool *done);
 static CURLcode tftp_doing(struct connectdata *conn, bool *dophase_done);
-static int tftp_getsock(struct connectdata *conn, curl_socket_t *socks,
-                        int numsocks);
+static int tftp_getsock(struct connectdata *conn, curl_socket_t *socks);
 static CURLcode tftp_translate_code(tftp_error_t error);
 
 
@@ -1082,14 +1081,9 @@ static CURLcode tftp_done(struct connectdata *conn, CURLcode status,
  * The getsock callback
  *
  **********************************************************/
-static int tftp_getsock(struct connectdata *conn, curl_socket_t *socks,
-                        int numsocks)
+static int tftp_getsock(struct connectdata *conn, curl_socket_t *socks)
 {
-  if(!numsocks)
-    return GETSOCK_BLANK;
-
   socks[0] = conn->sock[FIRSTSOCKET];
-
   return GETSOCK_READSOCK(0);
 }
 
diff --git a/lib/transfer.c b/lib/transfer.c
index 18d805d64..7f2e6d1fb 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -1354,20 +1354,14 @@ CURLcode Curl_readwrite(struct connectdata *conn,
  * in the proper state to have this information available.
  */
 int Curl_single_getsock(const struct connectdata *conn,
-                        curl_socket_t *sock, /* points to numsocks number
-                                                of sockets */
-                        int numsocks)
+                        curl_socket_t *sock)
 {
   const struct Curl_easy *data = conn->data;
   int bitmap = GETSOCK_BLANK;
   unsigned sockindex = 0;
 
   if(conn->handler->perform_getsock)
-    return conn->handler->perform_getsock(conn, sock, numsocks);
-
-  if(numsocks < 2)
-    /* simple check but we might need two slots */
-    return GETSOCK_BLANK;
+    return conn->handler->perform_getsock(conn, sock);
 
   /* don't include HOLD and PAUSE connections */
   if((data->req.keepon & KEEP_RECVBITS) == KEEP_RECV) {
diff --git a/lib/transfer.h b/lib/transfer.h
index da36f19f8..67fd91f25 100644
--- a/lib/transfer.h
+++ b/lib/transfer.h
@@ -47,8 +47,7 @@ CURLcode Curl_readwrite(struct connectdata *conn,
                         struct Curl_easy *data, bool *done,
                         bool *comeback);
 int Curl_single_getsock(const struct connectdata *conn,
-                        curl_socket_t *socks,
-                        int numsocks);
+                        curl_socket_t *socks);
 CURLcode Curl_readrewind(struct connectdata *conn);
 CURLcode Curl_fillreadbuffer(struct connectdata *conn, size_t bytes,
                              size_t *nreadp);
diff --git a/lib/url.c b/lib/url.c
index c1d68bdbc..d17016607 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -1440,11 +1440,10 @@ void Curl_verboseconnect(struct connectdata *conn)
 #endif
 
 int Curl_protocol_getsock(struct connectdata *conn,
-                          curl_socket_t *socks,
-                          int numsocks)
+                          curl_socket_t *socks)
 {
   if(conn->handler->proto_getsock)
-    return conn->handler->proto_getsock(conn, socks, numsocks);
+    return conn->handler->proto_getsock(conn, socks);
   /* Backup getsock logic. Since there is a live socket in use, we must wait
      for it or it will be removed from watching when the multi_socket API is
      used. */
@@ -1453,11 +1452,10 @@ int Curl_protocol_getsock(struct connectdata *conn,
 }
 
 int Curl_doing_getsock(struct connectdata *conn,
-                       curl_socket_t *socks,
-                       int numsocks)
+                       curl_socket_t *socks)
 {
   if(conn && conn->handler->doing_getsock)
-    return conn->handler->doing_getsock(conn, socks, numsocks);
+    return conn->handler->doing_getsock(conn, socks);
   return GETSOCK_BLANK;
 }
 
diff --git a/lib/url.h b/lib/url.h
index 7c87432c9..4c739b008 100644
--- a/lib/url.h
+++ b/lib/url.h
@@ -61,11 +61,8 @@ CURLcode Curl_setup_conn(struct connectdata *conn,
 void Curl_free_request_state(struct Curl_easy *data);
 
 int Curl_protocol_getsock(struct connectdata *conn,
-                          curl_socket_t *socks,
-                          int numsocks);
-int Curl_doing_getsock(struct connectdata *conn,
-                       curl_socket_t *socks,
-                       int numsocks);
+                          curl_socket_t *socks);
+int Curl_doing_getsock(struct connectdata *conn, curl_socket_t *socks);
 CURLcode Curl_parse_login_details(const char *login, const size_t len,
                                   char **userptr, char **passwdptr,
                                   char **optionsptr);
diff --git a/lib/urldata.h b/lib/urldata.h
index c8f01aa4f..563ec9c6f 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -664,27 +664,23 @@ struct Curl_handler {
   /* Called from the multi interface during the PROTOCONNECT phase, and it
      should then return a proper fd set */
   int (*proto_getsock)(struct connectdata *conn,
-                       curl_socket_t *socks,
-                       int numsocks);
+                       curl_socket_t *socks);
 
   /* Called from the multi interface during the DOING phase, and it should
      then return a proper fd set */
   int (*doing_getsock)(struct connectdata *conn,
-                       curl_socket_t *socks,
-                       int numsocks);
+                       curl_socket_t *socks);
 
   /* Called from the multi interface during the DO_MORE phase, and it should
      then return a proper fd set */
   int (*domore_getsock)(struct connectdata *conn,
-                        curl_socket_t *socks,
-                        int numsocks);
+                        curl_socket_t *socks);
 
   /* Called from the multi interface during the DO_DONE, PERFORM and
      WAITPERFORM phases, and it should then return a proper fd set. Not setting
      this will make libcurl use the generic default one. */
   int (*perform_getsock)(const struct connectdata *conn,
-                         curl_socket_t *socks,
-                         int numsocks);
+                         curl_socket_t *socks);
 
   /* This function *MAY* be set to a protocol-dependent function that is run
    * by the curl_disconnect(), as a step in the disconnection.  If the handler
diff --git a/lib/vtls/vtls.c b/lib/vtls/vtls.c
index 6a0e60fb6..422819899 100644
--- a/lib/vtls/vtls.c
+++ b/lib/vtls/vtls.c
@@ -515,14 +515,10 @@ void Curl_ssl_close_all(struct Curl_easy *data)
 #if defined(USE_OPENSSL) || defined(USE_GNUTLS) || defined(USE_SCHANNEL) || \
   defined(USE_SECTRANSP) || defined(USE_POLARSSL) || defined(USE_NSS) || \
   defined(USE_MBEDTLS) || defined(USE_WOLFSSL)
-int Curl_ssl_getsock(struct connectdata *conn, curl_socket_t *socks,
-                     int numsocks)
+int Curl_ssl_getsock(struct connectdata *conn, curl_socket_t *socks)
 {
   struct ssl_connect_data *connssl = &conn->ssl[FIRSTSOCKET];
 
-  if(!numsocks)
-    return GETSOCK_BLANK;
-
   if(connssl->connecting_state == ssl_connect_2_writing) {
     /* write mode */
     socks[0] = conn->sock[FIRSTSOCKET];
@@ -538,12 +534,10 @@ int Curl_ssl_getsock(struct connectdata *conn, curl_socket_t *socks,
 }
 #else
 int Curl_ssl_getsock(struct connectdata *conn,
-                     curl_socket_t *socks,
-                     int numsocks)
+                     curl_socket_t *socks)
 {
   (void)conn;
   (void)socks;
-  (void)numsocks;
   return GETSOCK_BLANK;
 }
 /* USE_OPENSSL || USE_GNUTLS || USE_SCHANNEL || USE_SECTRANSP || USE_NSS */
diff --git a/lib/vtls/vtls.h b/lib/vtls/vtls.h
index 173d360de..61d8416c2 100644
--- a/lib/vtls/vtls.h
+++ b/lib/vtls/vtls.h
@@ -143,8 +143,7 @@ bool Curl_ssl_config_matches(struct ssl_primary_config* data,
 bool Curl_clone_primary_ssl_config(struct ssl_primary_config *source,
                                    struct ssl_primary_config *dest);
 void Curl_free_primary_ssl_config(struct ssl_primary_config* sslc);
-int Curl_ssl_getsock(struct connectdata *conn, curl_socket_t *socks,
-                     int numsocks);
+int Curl_ssl_getsock(struct connectdata *conn, curl_socket_t *socks);
 
 int Curl_ssl_backend(void);