| 1 | #ifndef HEADER_CURL_CF_SOCKET_H
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| 2 | #define HEADER_CURL_CF_SOCKET_H
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| 3 | /***************************************************************************
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| 4 | * _ _ ____ _
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| 5 | * Project ___| | | | _ \| |
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| 6 | * / __| | | | |_) | |
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| 7 | * | (__| |_| | _ <| |___
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| 8 | * \___|\___/|_| \_\_____|
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| 9 | *
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| 10 | * Copyright (C) Daniel Stenberg, <[email protected]>, et al.
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| 11 | *
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| 12 | * This software is licensed as described in the file COPYING, which
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| 13 | * you should have received as part of this distribution. The terms
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| 14 | * are also available at https://curl.se/docs/copyright.html.
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| 15 | *
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| 16 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 17 | * copies of the Software, and permit persons to whom the Software is
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| 18 | * furnished to do so, under the terms of the COPYING file.
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| 19 | *
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| 20 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 21 | * KIND, either express or implied.
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| 22 | *
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| 23 | * SPDX-License-Identifier: curl
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| 24 | *
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| 25 | ***************************************************************************/
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| 26 | #include "curl_setup.h"
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| 27 |
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| 28 | #include "nonblock.h" /* for curlx_nonblock(), formerly Curl_nonblock() */
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| 29 | #include "sockaddr.h"
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| 30 |
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| 31 | struct Curl_addrinfo;
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| 32 | struct Curl_cfilter;
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| 33 | struct Curl_easy;
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| 34 | struct connectdata;
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| 35 | struct Curl_sockaddr_ex;
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| 36 | struct ip_quadruple;
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| 37 |
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| 38 | /*
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| 39 | * The Curl_sockaddr_ex structure is basically libcurl's external API
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| 40 | * curl_sockaddr structure with enough space available to directly hold any
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| 41 | * protocol-specific address structures. The variable declared here will be
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| 42 | * used to pass / receive data to/from the fopensocket callback if this has
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| 43 | * been set, before that, it is initialized from parameters.
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| 44 | */
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| 45 | struct Curl_sockaddr_ex {
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| 46 | int family;
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| 47 | int socktype;
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| 48 | int protocol;
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| 49 | unsigned int addrlen;
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| 50 | union {
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| 51 | struct sockaddr addr;
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| 52 | struct Curl_sockaddr_storage buff;
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| 53 | } _sa_ex_u;
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| 54 | };
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| 55 | #define sa_addr _sa_ex_u.addr
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| 56 |
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| 57 |
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| 58 | /*
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| 59 | * Create a socket based on info from 'conn' and 'ai'.
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| 60 | *
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| 61 | * Fill in 'addr' and 'sockfd' accordingly if OK is returned. If the open
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| 62 | * socket callback is set, used that!
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| 63 | *
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| 64 | */
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| 65 | CURLcode Curl_socket_open(struct Curl_easy *data,
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| 66 | const struct Curl_addrinfo *ai,
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| 67 | struct Curl_sockaddr_ex *addr,
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| 68 | int transport,
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| 69 | curl_socket_t *sockfd);
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| 70 |
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| 71 | int Curl_socket_close(struct Curl_easy *data, struct connectdata *conn,
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| 72 | curl_socket_t sock);
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| 73 |
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| 74 | #ifdef USE_WINSOCK
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| 75 | /* When you run a program that uses the Windows Sockets API, you may
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| 76 | experience slow performance when you copy data to a TCP server.
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| 77 |
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| 78 | https://support.microsoft.com/kb/823764
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| 79 |
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| 80 | Work-around: Make the Socket Send Buffer Size Larger Than the Program Send
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| 81 | Buffer Size
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| 82 |
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| 83 | */
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| 84 | void Curl_sndbufset(curl_socket_t sockfd);
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| 85 | #else
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| 86 | #define Curl_sndbufset(y) Curl_nop_stmt
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| 87 | #endif
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| 88 |
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| 89 | /**
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| 90 | * Assign the address `ai` to the Curl_sockaddr_ex `dest` and
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| 91 | * set the transport used.
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| 92 | */
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| 93 | void Curl_sock_assign_addr(struct Curl_sockaddr_ex *dest,
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| 94 | const struct Curl_addrinfo *ai,
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| 95 | int transport);
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| 96 |
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| 97 | /**
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| 98 | * Creates a cfilter that opens a TCP socket to the given address
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| 99 | * when calling its `connect` implementation.
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| 100 | * The filter will not touch any connection/data flags and can be
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| 101 | * used in happy eyeballing. Once selected for use, its `_active()`
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| 102 | * method needs to be called.
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| 103 | */
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| 104 | CURLcode Curl_cf_tcp_create(struct Curl_cfilter **pcf,
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| 105 | struct Curl_easy *data,
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| 106 | struct connectdata *conn,
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| 107 | const struct Curl_addrinfo *ai,
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| 108 | int transport);
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| 109 |
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| 110 | /**
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| 111 | * Creates a cfilter that opens a UDP socket to the given address
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| 112 | * when calling its `connect` implementation.
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| 113 | * The filter will not touch any connection/data flags and can be
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| 114 | * used in happy eyeballing. Once selected for use, its `_active()`
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| 115 | * method needs to be called.
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| 116 | */
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| 117 | CURLcode Curl_cf_udp_create(struct Curl_cfilter **pcf,
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| 118 | struct Curl_easy *data,
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| 119 | struct connectdata *conn,
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| 120 | const struct Curl_addrinfo *ai,
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| 121 | int transport);
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| 122 |
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| 123 | /**
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| 124 | * Creates a cfilter that opens a UNIX socket to the given address
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| 125 | * when calling its `connect` implementation.
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| 126 | * The filter will not touch any connection/data flags and can be
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| 127 | * used in happy eyeballing. Once selected for use, its `_active()`
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| 128 | * method needs to be called.
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| 129 | */
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| 130 | CURLcode Curl_cf_unix_create(struct Curl_cfilter **pcf,
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| 131 | struct Curl_easy *data,
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| 132 | struct connectdata *conn,
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| 133 | const struct Curl_addrinfo *ai,
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| 134 | int transport);
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| 135 |
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| 136 | /**
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| 137 | * Creates a cfilter that keeps a listening socket.
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| 138 | */
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| 139 | CURLcode Curl_conn_tcp_listen_set(struct Curl_easy *data,
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| 140 | struct connectdata *conn,
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| 141 | int sockindex,
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| 142 | curl_socket_t *s);
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| 143 |
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| 144 | /**
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| 145 | * Replace the listen socket with the accept()ed one.
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| 146 | */
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| 147 | CURLcode Curl_conn_tcp_accepted_set(struct Curl_easy *data,
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| 148 | struct connectdata *conn,
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| 149 | int sockindex,
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| 150 | curl_socket_t *s);
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| 151 |
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| 152 | /**
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| 153 | * Peek at the socket and remote ip/port the socket filter is using.
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| 154 | * The filter owns all returned values.
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| 155 | * @param psock pointer to hold socket descriptor or NULL
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| 156 | * @param paddr pointer to hold addr reference or NULL
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| 157 | * @param pip pointer to get IP quadruple or NULL
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| 158 | * Returns error if the filter is of invalid type.
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| 159 | */
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| 160 | CURLcode Curl_cf_socket_peek(struct Curl_cfilter *cf,
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| 161 | struct Curl_easy *data,
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| 162 | curl_socket_t *psock,
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| 163 | const struct Curl_sockaddr_ex **paddr,
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| 164 | struct ip_quadruple *pip);
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| 165 |
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| 166 | extern struct Curl_cftype Curl_cft_tcp;
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| 167 | extern struct Curl_cftype Curl_cft_udp;
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| 168 | extern struct Curl_cftype Curl_cft_unix;
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| 169 | extern struct Curl_cftype Curl_cft_tcp_accept;
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| 170 |
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| 171 | #endif /* HEADER_CURL_CF_SOCKET_H */
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