1 #ifndef HEADER_CURL_CONNECT_H 2 #define HEADER_CURL_CONNECT_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel (at) haxx.se>, et al. 11 * 12 * This software is licensed as described in the file COPYING, which 13 * you should have received as part of this distribution. The terms 14 * are also available at https://curl.haxx.se/docs/copyright.html. 15 * 16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 17 * copies of the Software, and permit persons to whom the Software is 18 * furnished to do so, under the terms of the COPYING file. 19 * 20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 21 * KIND, either express or implied. 22 * 23 ***************************************************************************/ 24 #include "curl_setup.h" 25 26 #include "nonblock.h" /* for curlx_nonblock(), formerly Curl_nonblock() */ 27 #include "sockaddr.h" 28 #include "timeval.h" 29 30 CURLcode Curl_is_connected(struct connectdata *conn, 31 int sockindex, 32 bool *connected); 33 34 CURLcode Curl_connecthost(struct connectdata *conn, 35 const struct Curl_dns_entry *host); 36 37 /* generic function that returns how much time there's left to run, according 38 to the timeouts set */ 39 timediff_t Curl_timeleft(struct Curl_easy *data, 40 struct curltime *nowp, 41 bool duringconnect); 42 43 #define DEFAULT_CONNECT_TIMEOUT 300000 /* milliseconds == five minutes */ 44 #define HAPPY_EYEBALLS_TIMEOUT 200 /* milliseconds to wait between 45 IPv4/IPv6 connection attempts */ 46 47 /* 48 * Used to extract socket and connectdata struct for the most recent 49 * transfer on the given Curl_easy. 50 * 51 * The returned socket will be CURL_SOCKET_BAD in case of failure! 52 */ 53 curl_socket_t Curl_getconnectinfo(struct Curl_easy *data, 54 struct connectdata **connp); 55 56 /* 57 * Check if a connection seems to be alive. 58 */ 59 bool Curl_connalive(struct connectdata *conn); 60 61 #ifdef USE_WINSOCK 62 /* When you run a program that uses the Windows Sockets API, you may 63 experience slow performance when you copy data to a TCP server. 64 65 https://support.microsoft.com/kb/823764 66 67 Work-around: Make the Socket Send Buffer Size Larger Than the Program Send 68 Buffer Size 69 70 */ 71 void Curl_sndbufset(curl_socket_t sockfd); 72 #else 73 #define Curl_sndbufset(y) Curl_nop_stmt 74 #endif 75 76 void Curl_updateconninfo(struct connectdata *conn, curl_socket_t sockfd); 77 void Curl_persistconninfo(struct connectdata *conn); 78 int Curl_closesocket(struct connectdata *conn, curl_socket_t sock); 79 80 /* 81 * The Curl_sockaddr_ex structure is basically libcurl's external API 82 * curl_sockaddr structure with enough space available to directly hold any 83 * protocol-specific address structures. The variable declared here will be 84 * used to pass / receive data to/from the fopensocket callback if this has 85 * been set, before that, it is initialized from parameters. 86 */ 87 struct Curl_sockaddr_ex { 88 int family; 89 int socktype; 90 int protocol; 91 unsigned int addrlen; 92 union { 93 struct sockaddr addr; 94 struct Curl_sockaddr_storage buff; 95 } _sa_ex_u; 96 }; 97 #define sa_addr _sa_ex_u.addr 98 99 /* 100 * Create a socket based on info from 'conn' and 'ai'. 101 * 102 * Fill in 'addr' and 'sockfd' accordingly if OK is returned. If the open 103 * socket callback is set, used that! 104 * 105 */ 106 CURLcode Curl_socket(struct connectdata *conn, 107 const Curl_addrinfo *ai, 108 struct Curl_sockaddr_ex *addr, 109 curl_socket_t *sockfd); 110 111 void Curl_tcpnodelay(struct connectdata *conn, curl_socket_t sockfd); 112 113 /* 114 * Curl_conncontrol() marks the end of a connection/stream. The 'closeit' 115 * argument specifies if it is the end of a connection or a stream. 116 * 117 * For stream-based protocols (such as HTTP/2), a stream close will not cause 118 * a connection close. Other protocols will close the connection for both 119 * cases. 120 * 121 * It sets the bit.close bit to TRUE (with an explanation for debug builds), 122 * when the connection will close. 123 */ 124 125 #define CONNCTRL_KEEP 0 /* undo a marked closure */ 126 #define CONNCTRL_CONNECTION 1 127 #define CONNCTRL_STREAM 2 128 129 void Curl_conncontrol(struct connectdata *conn, 130 int closeit 131 #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS) 132 , const char *reason 133 #endif 134 ); 135 136 #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS) 137 #define streamclose(x,y) Curl_conncontrol(x, CONNCTRL_STREAM, y) 138 #define connclose(x,y) Curl_conncontrol(x, CONNCTRL_CONNECTION, y) 139 #define connkeep(x,y) Curl_conncontrol(x, CONNCTRL_KEEP, y) 140 #else /* if !DEBUGBUILD || CURL_DISABLE_VERBOSE_STRINGS */ 141 #define streamclose(x,y) Curl_conncontrol(x, CONNCTRL_STREAM) 142 #define connclose(x,y) Curl_conncontrol(x, CONNCTRL_CONNECTION) 143 #define connkeep(x,y) Curl_conncontrol(x, CONNCTRL_KEEP) 144 #endif 145 146 bool Curl_conn_data_pending(struct connectdata *conn, int sockindex); 147 148 #endif /* HEADER_CURL_CONNECT_H */ 149
