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cf-socket.h
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#ifndef HEADER_CURL_CF_SOCKET_H
#define HEADER_CURL_CF_SOCKET_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 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
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "curl_setup.h"
#include "nonblock.h" /* for curlx_nonblock(), formerly Curl_nonblock() */
#include "sockaddr.h"
struct Curl_addrinfo;
struct Curl_cfilter;
struct Curl_easy;
struct connectdata;
struct Curl_sockaddr_ex;
#ifndef SIZEOF_CURL_SOCKET_T
/* configure and cmake check and set the define */
# ifdef _WIN64
# define SIZEOF_CURL_SOCKET_T 8
# else
/* default guess */
# define SIZEOF_CURL_SOCKET_T 4
# endif
#endif
#if SIZEOF_CURL_SOCKET_T < 8
# define CURL_FORMAT_SOCKET_T "d"
#else
# define CURL_FORMAT_SOCKET_T "qd"
#endif
/*
* The Curl_sockaddr_ex structure is basically libcurl's external API
* curl_sockaddr structure with enough space available to directly hold any
* protocol-specific address structures. The variable declared here will be
* used to pass / receive data to/from the fopensocket callback if this has
* been set, before that, it is initialized from parameters.
*/
struct Curl_sockaddr_ex {
int family;
int socktype;
int protocol;
unsigned int addrlen;
union {
struct sockaddr addr;
struct Curl_sockaddr_storage buff;
} _sa_ex_u;
};
#define sa_addr _sa_ex_u.addr
/*
* Create a socket based on info from 'conn' and 'ai'.
*
* Fill in 'addr' and 'sockfd' accordingly if OK is returned. If the open
* socket callback is set, used that!
*
*/
CURLcode Curl_socket_open(struct Curl_easy *data,
const struct Curl_addrinfo *ai,
struct Curl_sockaddr_ex *addr,
int transport,
curl_socket_t *sockfd);
int Curl_socket_close(struct Curl_easy *data, struct connectdata *conn,
curl_socket_t sock);
/**
* Determine the curl code for a socket connect() == -1 with errno.
*/
CURLcode Curl_socket_connect_result(struct Curl_easy *data,
const char *ipaddress, int error);
#ifdef USE_WINSOCK
/* When you run a program that uses the Windows Sockets API, you may
experience slow performance when you copy data to a TCP server.
https://support.microsoft.com/kb/823764
Work-around: Make the Socket Send Buffer Size Larger Than the Program Send
Buffer Size
*/
void Curl_sndbufset(curl_socket_t sockfd);
#else
#define Curl_sndbufset(y) Curl_nop_stmt
#endif
/**
* Assign the address `ai` to the Curl_sockaddr_ex `dest` and
* set the transport used.
*/
void Curl_sock_assign_addr(struct Curl_sockaddr_ex *dest,
const struct Curl_addrinfo *ai,
int transport);
/**
* Creates a cfilter that opens a TCP socket to the given address
* when calling its `connect` implementation.
* The filter will not touch any connection/data flags and can be
* used in happy eyeballing. Once selected for use, its `_active()`
* method needs to be called.
*/
CURLcode Curl_cf_tcp_create(struct Curl_cfilter **pcf,
struct Curl_easy *data,
struct connectdata *conn,
const struct Curl_addrinfo *ai,
int transport);
/**
* Creates a cfilter that opens a UDP socket to the given address
* when calling its `connect` implementation.
* The filter will not touch any connection/data flags and can be
* used in happy eyeballing. Once selected for use, its `_active()`
* method needs to be called.
*/
CURLcode Curl_cf_udp_create(struct Curl_cfilter **pcf,
struct Curl_easy *data,
struct connectdata *conn,
const struct Curl_addrinfo *ai,
int transport);
/**
* Creates a cfilter that opens a UNIX socket to the given address
* when calling its `connect` implementation.
* The filter will not touch any connection/data flags and can be
* used in happy eyeballing. Once selected for use, its `_active()`
* method needs to be called.
*/
CURLcode Curl_cf_unix_create(struct Curl_cfilter **pcf,
struct Curl_easy *data,
struct connectdata *conn,
const struct Curl_addrinfo *ai,
int transport);
/**
* Creates a cfilter that keeps a listening socket.
*/
CURLcode Curl_conn_tcp_listen_set(struct Curl_easy *data,
struct connectdata *conn,
int sockindex,
curl_socket_t *s);
/**
* Replace the listen socket with the accept()ed one.
*/
CURLcode Curl_conn_tcp_accepted_set(struct Curl_easy *data,
struct connectdata *conn,
int sockindex,
curl_socket_t *s);
/**
* Return TRUE iff `cf` is a socket filter.
*/
bool Curl_cf_is_socket(struct Curl_cfilter *cf);
/**
* Peek at the socket and remote ip/port the socket filter is using.
* The filter owns all returned values.
* @param psock pointer to hold socket descriptor or NULL
* @param paddr pointer to hold addr reference or NULL
* @param pr_ip_str pointer to hold remote addr as string or NULL
* @param pr_port pointer to hold remote port number or NULL
* @param pl_ip_str pointer to hold local addr as string or NULL
* @param pl_port pointer to hold local port number or NULL
* Returns error if the filter is of invalid type.
*/
CURLcode Curl_cf_socket_peek(struct Curl_cfilter *cf,
struct Curl_easy *data,
curl_socket_t *psock,
const struct Curl_sockaddr_ex **paddr,
const char **pr_ip_str, int *pr_port,
const char **pl_ip_str, int *pl_port);
extern struct Curl_cftype Curl_cft_tcp;
extern struct Curl_cftype Curl_cft_udp;
extern struct Curl_cftype Curl_cft_unix;
extern struct Curl_cftype Curl_cft_tcp_accept;
#endif /* HEADER_CURL_CF_SOCKET_H */