http.c File Reference

HTTP connect functions. More...

#include <config.h>
#include <ctype.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
#include <assert.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "IO.h"
#include "iowatch.hh"
#include "tls.h"
#include "Url.h"
#include "../msg.h"
#include "../klist.h"
#include "../dns.h"
#include "../web.hh"
#include "../cookies.h"
#include "../auth.h"
#include "../prefs.h"
#include "../misc.h"
#include "../uicmd.hh"

Include dependency graph for http.c:

Go to the source code of this file.

Macros
#define	MSG_BW(web, root, ...)
#define	_MSG_BW(web, root, ...)

Functions
static void	Http_socket_enqueue (Server_t *srv, SocketData_t *sock)
	Add socket data to the queue.
static Server_t *	Http_server_get (const char *host, uint_t port, bool_t https)
static void	Http_server_remove (Server_t *srv)
static void	Http_connect_socket (ChainLink *Info)
	This function is called after the DNS succeeds in solving a hostname.
static char *	Http_get_connect_str (const DilloUrl *url)
	Return a new string for the request used to tunnel HTTPS through a proxy.
static void	Http_send_query (SocketData_t *S)
	Create and submit the HTTP query to the IO engine.
static void	Http_socket_free (int SKey)
	Free SocketData_t struct.
int	a_Http_init (void)
	Initialize proxy vars and Accept-Language header.
int	a_Http_proxy_auth (void)
	Tell whether the proxy auth is already set (user:password).
void	a_Http_set_proxy_passwd (const char *str)
	Activate entered proxy password for HTTP.
static int	Http_sock_new (void)
	Create and init a new SocketData_t struct, insert into ValidSocks, and return a primary key for it.
static int	Http_fd_map_cmp (const void *v1, const void *v2)
	Compare by FD.
static void	Http_fd_map_add_entry (SocketData_t *sd)
static void	Http_fd_map_remove_entry (int fd)
	Remove and free entry from fd_map.
void	a_Http_connect_done (int fd, bool_t success)
static void	Http_socket_activate (Server_t *srv, SocketData_t *sd)
static void	Http_connect_queued_sockets (Server_t *srv)
static char *	Http_get_referer (const DilloUrl *url)
	Make the HTTP header's Referer line according to preferences (default is "host" i.e.
static Dstr *	Http_make_content_type (const DilloUrl *url)
	Generate Content-Type header value for a POST query.
static Dstr *	Http_make_query_str (DilloWeb *web, bool_t use_proxy, bool_t use_tls)
	Make the http query string.
static void	Http_connect_tls (ChainLink *info)
	Prepare an HTTPS connection.
static void	Http_connect_socket_cb (int fd, void *data)
	connect() couldn't complete before, but now it's ready, so let's try again.
static int	Http_must_use_proxy (const char *hostname)
	Test proxy settings and check the no_proxy domains list.
static void	Http_dns_cb (int Status, Dlist *addr_list, void *data)
	Callback function for the DNS resolver.
static int	Http_get (ChainLink *Info, void *Data1)
	Asynchronously create a new http connection for 'Url'.
static bool_t	Http_socket_reuse_compatible (SocketData_t *old, SocketData_t *new)
	Can the old socket's fd be reused for the new socket?.
static void	Http_socket_reuse (int SKey)
	If any entry in the socket data queue can reuse our connection, set it up and send off a new query.
void	a_Http_ccc (int Op, int Branch, int Dir, ChainLink *Info, void *Data1, void *Data2)
	CCC function for the HTTP module.
static void	Http_servers_remove_all (void)
static void	Http_fd_map_remove_all (void)
void	a_Http_freeall (void)
	Deallocate memory used by http module.

Variables
static const int	HTTP_SOCKET_USE_PROXY = 0x1
static const int	HTTP_SOCKET_QUEUED = 0x2
static const int	HTTP_SOCKET_TO_BE_FREED = 0x4
static const int	HTTP_SOCKET_TLS = 0x8
static const int	HTTP_SOCKET_IOWATCH_ACTIVE = 0x10
static Klist_t *	ValidSocks = NULL
static DilloUrl *	HTTP_Proxy = NULL
static char *	HTTP_Proxy_Auth_base64 = NULL
static char *	HTTP_Language_hdr = NULL
static Dlist *	servers
static Dlist *	fd_map

Detailed Description

HTTP connect functions.

Definition in file http.c.

Macro Definition Documentation

_MSG_BW

#define _MSG_BW	(		web,
			root,
			...
	)

Definition at line 52 of file http.c.

MSG_BW

#define MSG_BW	(		web,
			root,
			...
	)

Value:

D_STMT_START {                                                        \
   if (a_Web_valid((web)) && (!(root) || (web)->flags & WEB_RootUrl)) \
      a_UIcmd_set_msg((web)->bw, __VA_ARGS__);                        \
} D_STMT_END

Definition at line 46 of file http.c.

Function Documentation

a_Http_ccc()

void a_Http_ccc	(	int	Op,
		int	Branch,
		int	Dir,
		ChainLink *	Info,
		void *	Data1,
		void *	Data2
	)

CCC function for the HTTP module.

Definition at line 883 of file http.c.

References _MSG, a_Chain_bcb(), a_Chain_bfcb(), a_Chain_check(), a_Chain_fcb(), a_Chain_link_new(), a_Http_ccc(), a_IO_ccc(), a_Klist_get_data(), a_Tls_connect(), BCK, DataBuf::Buf, dFree(), dList_find_custom(), dReturn_if_fail, dStr_append(), dStr_free(), fd_map, FWD, Http_fd_map_cmp(), Http_get(), Http_sock_new(), Http_socket_free(), Http_socket_reuse(), INT2VOIDP, ChainLink::LocalKey, MSG, MSG_BW, MSG_WARN, OpAbort, OpEnd, OpSend, OpStart, URL_HOST, URL_STR, ValidSocks, and VOIDP2INT.

Referenced by a_Capi_ccc(), and a_Http_ccc().

a_Http_connect_done()

void a_Http_connect_done	(	int	fd,
		bool_t	success
	)

Definition at line 214 of file http.c.

References a_Chain_bfcb(), a_Klist_get_data(), a_Web_valid(), dClose(), dFree(), dList_find_custom(), fd_map, Http_fd_map_cmp(), Http_send_query(), Http_socket_free(), INT2VOIDP, ChainLink::LocalKey, MSG, MSG_BW, OpAbort, OpSend, ValidSocks, and VOIDP2INT.

Referenced by a_Tls_mbedtls_connect(), a_Tls_openssl_connect(), Http_connect_socket(), Http_connect_socket_cb(), Http_socket_reuse(), Tls_connect(), and Tls_handshake().

a_Http_freeall()

void a_Http_freeall

(

void

)

Deallocate memory used by http module.

(Call this one at exit time)

Definition at line 1128 of file http.c.

References a_Klist_free(), a_Url_free(), dFree(), Http_fd_map_remove_all(), HTTP_Language_hdr, HTTP_Proxy, HTTP_Proxy_Auth_base64, Http_servers_remove_all(), and ValidSocks.

Referenced by main().

a_Http_init()

int a_Http_init

(

void

)

Initialize proxy vars and Accept-Language header.

Definition at line 118 of file http.c.

References a_Url_dup(), a_Url_new(), dList_new(), dStrconcat(), dStrdup(), fd_map, DilloPrefs::http_language, HTTP_Language_hdr, HTTP_Proxy, DilloPrefs::http_proxy, prefs, and servers.

Referenced by main().

a_Http_proxy_auth()

int a_Http_proxy_auth

(

void

)

Tell whether the proxy auth is already set (user:password).

Return: 1 Yes, 0 No

Definition at line 148 of file http.c.

References HTTP_Proxy_Auth_base64.

Referenced by main().

a_Http_set_proxy_passwd()

void a_Http_set_proxy_passwd

(

const char *

str

)

Activate entered proxy password for HTTP.

Definition at line 156 of file http.c.

References a_Misc_encode_base64(), dFree(), dStrconcat(), HTTP_Proxy_Auth_base64, DilloPrefs::http_proxyuser, and prefs.

Referenced by main().

Http_connect_queued_sockets()

static void Http_connect_queued_sockets ( Server_t *  srv )

static

Definition at line 249 of file http.c.

References _MSG, a_Tls_connect_ready(), a_Web_valid(), dFree(), dList_length(), dList_nth_data(), dList_remove(), Http_connect_socket(), DilloPrefs::http_max_conns, Http_server_remove(), Http_socket_activate(), Http_socket_free(), HTTP_SOCKET_TLS, HTTP_SOCKET_TO_BE_FREED, prefs, TLS_CONNECT_NEVER, TLS_CONNECT_READY, and VOIDP2INT.

Referenced by Http_dns_cb(), and Http_socket_free().

Http_connect_socket()

static void Http_connect_socket ( ChainLink *  Info )

static

This function is called after the DNS succeeds in solving a hostname.

Task: Finish socket setup and start connecting the socket.

Definition at line 568 of file http.c.

References a_Http_connect_done(), a_IOwatch_add_fd(), a_Klist_get_data(), a_Web_valid(), DilloHost::af, DilloHost::alen, DilloHost::data, dClose(), DIO_WRITE, dList_length(), dList_nth_data(), dStrerror, FALSE, Http_connect_socket_cb(), Http_connect_tls(), Http_fd_map_add_entry(), Http_fd_map_remove_entry(), HTTP_SOCKET_IOWATCH_ACTIVE, HTTP_SOCKET_TLS, ChainLink::LocalKey, MSG, MSG_BW, TRUE, ValidSocks, VOIDP2INT, and WEB_RootUrl.

Referenced by Http_connect_queued_sockets(), and Http_connect_socket_cb().

Http_connect_socket_cb()

static void Http_connect_socket_cb ( int  fd, void *  data  )

static

connect() couldn't complete before, but now it's ready, so let's try again.

Definition at line 530 of file http.c.

References a_Http_connect_done(), a_IOwatch_remove_fd(), a_Klist_get_data(), dStrerror, Http_connect_socket(), Http_connect_tls(), HTTP_SOCKET_TLS, MSG, TRUE, ValidSocks, and VOIDP2INT.

Referenced by Http_connect_socket().

Http_connect_tls()

static void Http_connect_tls ( ChainLink *  info )

static

Prepare an HTTPS connection.

If necessary, tunnel through a proxy first.

Definition at line 505 of file http.c.

References a_Chain_bcb(), a_Chain_bfcb(), a_Chain_dbuf_new(), a_Klist_get_data(), a_Tls_connect(), dFree(), dStr_new(), Http_get_connect_str(), HTTP_SOCKET_USE_PROXY, ChainLink::LocalKey, MSG_BW, OpSend, ValidSocks, and VOIDP2INT.

Referenced by Http_connect_socket(), and Http_connect_socket_cb().

Http_dns_cb()

static void Http_dns_cb ( int  Status, Dlist *  addr_list, void *  data  )

static

Callback function for the DNS resolver.

Continue connecting the socket, or abort upon error condition. S->web is checked to assert the operation wasn't aborted while waiting.

Definition at line 736 of file http.c.

References a_Chain_bfcb(), a_Klist_get_data(), a_Web_valid(), dFree(), FALSE, Http_connect_queued_sockets(), HTTP_Proxy, Http_server_get(), Http_socket_enqueue(), Http_socket_free(), HTTP_SOCKET_TLS, HTTP_SOCKET_USE_PROXY, MSG_BW, OpAbort, TRUE, URL_HOST, ValidSocks, and VOIDP2INT.

Referenced by Http_get().

Http_fd_map_add_entry()

static void Http_fd_map_add_entry ( SocketData_t *  sd )

static

Definition at line 185 of file http.c.

References dList_append(), dList_find_custom(), dNew0, fd_map, Http_fd_map_cmp(), INT2VOIDP, MSG_ERR, and VOIDP2INT.

Referenced by Http_connect_socket(), and Http_socket_reuse().

Http_fd_map_cmp()

static int Http_fd_map_cmp ( const void *  v1, const void *  v2  )

static

Compare by FD.

Definition at line 177 of file http.c.

References VOIDP2INT.

Referenced by a_Http_ccc(), a_Http_connect_done(), Http_fd_map_add_entry(), and Http_fd_map_remove_entry().

Http_fd_map_remove_all()

static void Http_fd_map_remove_all ( void  )

static

Definition at line 1112 of file http.c.

References dFree(), dList_free(), dList_length(), dList_nth_data(), and fd_map.

Referenced by a_Http_freeall().

Http_fd_map_remove_entry()

static void Http_fd_map_remove_entry ( int  fd )

static

Remove and free entry from fd_map.

Definition at line 202 of file http.c.

References dFree(), dList_find_custom(), dList_remove_fast(), fd_map, Http_fd_map_cmp(), INT2VOIDP, and MSG.

Referenced by Http_connect_socket(), and Http_socket_free().

Http_get()

static int Http_get ( ChainLink *  Info, void *  Data1  )

static

Asynchronously create a new http connection for 'Url'.

We'll set some socket parameters; the rest will be set later when the IP is known. ( Data1 = Web structure ) Return value: 0 on success, -1 otherwise

Definition at line 780 of file http.c.

References a_Dns_resolve(), a_Klist_get_data(), a_Url_dup(), dFree(), dStrAsciiCasecmp(), dStrdup(), DilloUrl::flags, Http_dns_cb(), Http_must_use_proxy(), HTTP_Proxy, HTTP_SOCKET_TLS, HTTP_SOCKET_USE_PROXY, ChainLink::LocalKey, MSG_BW, URL_HOST, URL_PORT, URL_SCHEME, ValidSocks, and VOIDP2INT.

Referenced by a_Http_ccc().

Http_get_connect_str()

static char * Http_get_connect_str ( const DilloUrl *  url )

static

Return a new string for the request used to tunnel HTTPS through a proxy.

Definition at line 693 of file http.c.

References dFree(), dReturn_val_if_fail, dStr_free(), dStr_new(), dStr_sprintfa(), dStrconcat(), dStrdup(), Http_must_use_proxy(), HTTP_Proxy_Auth_base64, Dstr::str, URL_AUTHORITY, and URL_HOST.

Referenced by Http_connect_tls().

Http_get_referer()

static char * Http_get_referer ( const DilloUrl *  url )

static

Make the HTTP header's Referer line according to preferences (default is "host" i.e.

"scheme://hostname/" ).

Definition at line 335 of file http.c.

References _MSG, dStrconcat(), dStrdup(), DilloPrefs::http_referer, prefs, URL_AUTHORITY, URL_PATH, URL_PATH_, and URL_SCHEME.

Referenced by Http_make_query_str().

Http_make_content_type()

static Dstr * Http_make_content_type ( const DilloUrl *  url )

static

Generate Content-Type header value for a POST query.

Definition at line 356 of file http.c.

References _MSG, dStr_append_c(), dStr_append_l(), dStr_new(), URL_DATA, URL_FLAGS, and URL_MultipartEnc.

Referenced by Http_make_query_str().

Http_make_query_str()

static Dstr * Http_make_query_str ( DilloWeb *  web, bool_t  use_proxy, bool_t  use_tls  )

static

Make the http query string.

Definition at line 383 of file http.c.

References _MSG, a_Auth_get_auth_str(), a_Cookies_get_query(), dFree(), dStr_append_l(), dStr_free(), dStr_new(), dStr_printable(), dStr_sprintf(), dStr_sprintfa(), dStr_truncate(), _DilloWeb::flags, Http_get_referer(), HTTP_Language_hdr, Http_make_content_type(), DilloPrefs::http_persistent_conns, HTTP_Proxy_Auth_base64, DilloPrefs::http_user_agent, prefs, _DilloWeb::requester, Dstr::str, TRUE, _DilloWeb::url, URL_AUTHORITY, URL_DATA, URL_E2EQuery, URL_FLAGS, URL_PATH, URL_PATH_, URL_Post, URL_QUERY, URL_QUERY_, URL_STR, WEB_Image, and WEB_Stylesheet.

Referenced by Http_send_query().

Http_must_use_proxy()

static int Http_must_use_proxy ( const char *  hostname )

static

Test proxy settings and check the no_proxy domains list.

Return value: whether to use proxy or not.

Definition at line 663 of file http.c.

References _MSG, dFree(), dStrAsciiCasecmp(), dStrdup(), dStrsep(), HTTP_Proxy, DilloPrefs::no_proxy, and prefs.

Referenced by Http_get(), and Http_get_connect_str().

Http_send_query()

static void Http_send_query ( SocketData_t *  S )

static

Create and submit the HTTP query to the IO engine.

Definition at line 482 of file http.c.

References a_Chain_bcb(), a_Chain_dbuf_new(), dFree(), dStr_free(), Http_make_query_str(), HTTP_SOCKET_TLS, HTTP_SOCKET_USE_PROXY, Dstr::len, MSG_BW, OpSend, and Dstr::str.

Referenced by a_Http_connect_done().

Http_server_get()

static Server_t * Http_server_get ( const char *  host, uint_t  port, bool_t  https  )

static

Definition at line 1058 of file http.c.

References dList_append(), dList_length(), dList_new(), dList_nth_data(), dNew0, dStrAsciiCasecmp(), dStrdup(), and servers.

Referenced by Http_dns_cb(), Http_socket_free(), and Http_socket_reuse().

Http_server_remove()

static void Http_server_remove ( Server_t *  srv )

static

Definition at line 1082 of file http.c.

References dFree(), dList_free(), dList_nth_data(), dList_remove_fast(), and servers.

Referenced by Http_connect_queued_sockets(), and Http_servers_remove_all().

Http_servers_remove_all()

static void Http_servers_remove_all ( void  )

static

Definition at line 1096 of file http.c.

References dFree(), dList_free(), dList_length(), dList_nth_data(), dList_remove(), Http_server_remove(), and servers.

Referenced by a_Http_freeall().

Http_sock_new()

static int Http_sock_new ( void  )

static

Create and init a new SocketData_t struct, insert into ValidSocks, and return a primary key for it.

Definition at line 167 of file http.c.

References a_Klist_insert(), dNew0, and ValidSocks.

Referenced by a_Http_ccc().

Http_socket_activate()

static void Http_socket_activate ( Server_t *  srv, SocketData_t *  sd  )

static

Definition at line 241 of file http.c.

References dList_remove().

Referenced by Http_connect_queued_sockets(), and Http_socket_reuse().

Http_socket_enqueue()

static void Http_socket_enqueue ( Server_t *  srv, SocketData_t *  sock  )

static

Add socket data to the queue.

Pages/stylesheets/etc. have higher priority than images.

Definition at line 1039 of file http.c.

References a_Web_valid(), dList_append(), dList_insert_pos(), dList_length(), dList_nth_data(), HTTP_SOCKET_QUEUED, and WEB_Image.

Referenced by Http_dns_cb().

Http_socket_free()

static void Http_socket_free ( int  SKey )

static

Free SocketData_t struct.

Definition at line 296 of file http.c.

References a_IOwatch_remove_fd(), a_Klist_get_data(), a_Klist_remove(), a_Tls_close_by_fd(), a_Tls_reset_server_state(), a_Url_free(), dClose(), dFree(), dStr_free(), Http_connect_queued_sockets(), Http_fd_map_remove_entry(), Http_server_get(), HTTP_SOCKET_IOWATCH_ACTIVE, HTTP_SOCKET_QUEUED, HTTP_SOCKET_TLS, HTTP_SOCKET_TO_BE_FREED, and ValidSocks.

Referenced by a_Http_ccc(), a_Http_connect_done(), Http_connect_queued_sockets(), Http_dns_cb(), and Http_socket_reuse().

Http_socket_reuse()

static void Http_socket_reuse ( int  SKey )

static

If any entry in the socket data queue can reuse our connection, set it up and send off a new query.

Definition at line 842 of file http.c.

References _MSG, a_Http_connect_done(), a_Klist_get_data(), dClose(), dList_length(), dList_nth_data(), Http_fd_map_add_entry(), Http_server_get(), Http_socket_activate(), Http_socket_free(), Http_socket_reuse_compatible(), HTTP_SOCKET_TLS, HTTP_SOCKET_TO_BE_FREED, TRUE, URL_STR, and ValidSocks.

Referenced by a_Http_ccc().

Http_socket_reuse_compatible()

static bool_t Http_socket_reuse_compatible ( SocketData_t *  old, SocketData_t *  new  )

static

Can the old socket's fd be reused for the new socket?.

NOTE: old and new must come from the same Server_t. This is not built to accept arbitrary sockets.

Definition at line 822 of file http.c.

References a_Web_valid(), dStrAsciiCasecmp(), FALSE, HTTP_SOCKET_TLS, HTTP_SOCKET_USE_PROXY, TRUE, URL_HOST, and URL_PORT.

Referenced by Http_socket_reuse().

Variable Documentation

fd_map

Dlist* fd_map

static

Definition at line 113 of file http.c.

Referenced by a_Http_ccc(), a_Http_connect_done(), a_Http_init(), Http_fd_map_add_entry(), Http_fd_map_remove_all(), and Http_fd_map_remove_entry().

HTTP_Language_hdr

char* HTTP_Language_hdr = NULL

static

Definition at line 107 of file http.c.

Referenced by a_Http_freeall(), a_Http_init(), and Http_make_query_str().

HTTP_Proxy

DilloUrl* HTTP_Proxy = NULL

static

Definition at line 105 of file http.c.

Referenced by a_Http_freeall(), a_Http_init(), Http_dns_cb(), Http_get(), and Http_must_use_proxy().

HTTP_Proxy_Auth_base64

char* HTTP_Proxy_Auth_base64 = NULL

static

Definition at line 106 of file http.c.

Referenced by a_Http_freeall(), a_Http_proxy_auth(), a_Http_set_proxy_passwd(), Http_get_connect_str(), and Http_make_query_str().

HTTP_SOCKET_IOWATCH_ACTIVE

const int HTTP_SOCKET_IOWATCH_ACTIVE = 0x10

static

Definition at line 58 of file http.c.

Referenced by Http_connect_socket(), and Http_socket_free().

HTTP_SOCKET_QUEUED

const int HTTP_SOCKET_QUEUED = 0x2

static

Definition at line 55 of file http.c.

Referenced by Http_socket_enqueue(), and Http_socket_free().

HTTP_SOCKET_TLS

const int HTTP_SOCKET_TLS = 0x8

static

Definition at line 57 of file http.c.

Referenced by Http_connect_queued_sockets(), Http_connect_socket(), Http_connect_socket_cb(), Http_dns_cb(), Http_get(), Http_send_query(), Http_socket_free(), Http_socket_reuse(), and Http_socket_reuse_compatible().

HTTP_SOCKET_TO_BE_FREED

const int HTTP_SOCKET_TO_BE_FREED = 0x4

static

Definition at line 56 of file http.c.

Referenced by Http_connect_queued_sockets(), Http_socket_free(), and Http_socket_reuse().

HTTP_SOCKET_USE_PROXY

const int HTTP_SOCKET_USE_PROXY = 0x1

static

Definition at line 54 of file http.c.

Referenced by Http_connect_tls(), Http_dns_cb(), Http_get(), Http_send_query(), and Http_socket_reuse_compatible().

servers

Dlist* servers

static

Definition at line 108 of file http.c.

Referenced by a_Http_init(), Http_server_get(), Http_server_remove(), and Http_servers_remove_all().

ValidSocks

Klist_t* ValidSocks = NULL

static

Definition at line 103 of file http.c.

Referenced by a_Http_ccc(), a_Http_connect_done(), a_Http_freeall(), Http_connect_socket(), Http_connect_socket_cb(), Http_connect_tls(), Http_dns_cb(), Http_get(), Http_sock_new(), Http_socket_free(), and Http_socket_reuse().