mirror of
https://github.com/curl/curl.git
synced 2024-12-03 06:20:31 +08:00
1025 lines
29 KiB
C
1025 lines
29 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2010, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* RFC1939 POP3 protocol
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* RFC2384 POP URL Scheme
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* RFC2595 Using TLS with IMAP, POP3 and ACAP
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*
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***************************************************************************/
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#include "setup.h"
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#ifndef CURL_DISABLE_POP3
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <ctype.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_UTSNAME_H
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#include <sys/utsname.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef __VMS
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#include <in.h>
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#include <inet.h>
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#endif
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#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
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#undef in_addr_t
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#define in_addr_t unsigned long
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#endif
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#include <curl/curl.h>
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#include "urldata.h"
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#include "sendf.h"
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#include "easyif.h" /* for Curl_convert_... prototypes */
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#include "if2ip.h"
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#include "hostip.h"
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#include "progress.h"
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#include "transfer.h"
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#include "escape.h"
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#include "http.h" /* for HTTP proxy tunnel stuff */
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#include "socks.h"
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#include "pop3.h"
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#include "strtoofft.h"
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#include "strequal.h"
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#include "sslgen.h"
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#include "connect.h"
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#include "strerror.h"
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#include "select.h"
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#include "multiif.h"
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#include "url.h"
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#include "rawstr.h"
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#include "strtoofft.h"
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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/* Local API functions */
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static CURLcode pop3_parse_url_path(struct connectdata *conn);
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static CURLcode pop3_regular_transfer(struct connectdata *conn, bool *done);
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static CURLcode pop3_do(struct connectdata *conn, bool *done);
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static CURLcode pop3_done(struct connectdata *conn,
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CURLcode, bool premature);
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static CURLcode pop3_connect(struct connectdata *conn, bool *done);
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static CURLcode pop3_disconnect(struct connectdata *conn);
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static CURLcode pop3_multi_statemach(struct connectdata *conn, bool *done);
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static int pop3_getsock(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks);
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static CURLcode pop3_doing(struct connectdata *conn,
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bool *dophase_done);
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static CURLcode pop3_setup_connection(struct connectdata * conn);
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/*
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* POP3 protocol handler.
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*/
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const struct Curl_handler Curl_handler_pop3 = {
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"POP3", /* scheme */
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pop3_setup_connection, /* setup_connection */
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pop3_do, /* do_it */
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pop3_done, /* done */
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ZERO_NULL, /* do_more */
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pop3_connect, /* connect_it */
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pop3_multi_statemach, /* connecting */
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pop3_doing, /* doing */
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pop3_getsock, /* proto_getsock */
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pop3_getsock, /* doing_getsock */
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ZERO_NULL, /* perform_getsock */
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pop3_disconnect, /* disconnect */
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PORT_POP3, /* defport */
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PROT_POP3 /* protocol */
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};
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#ifdef USE_SSL
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/*
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* POP3S protocol handler.
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*/
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const struct Curl_handler Curl_handler_pop3s = {
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"POP3S", /* scheme */
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pop3_setup_connection, /* setup_connection */
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pop3_do, /* do_it */
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pop3_done, /* done */
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ZERO_NULL, /* do_more */
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pop3_connect, /* connect_it */
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pop3_multi_statemach, /* connecting */
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pop3_doing, /* doing */
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pop3_getsock, /* proto_getsock */
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pop3_getsock, /* doing_getsock */
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ZERO_NULL, /* perform_getsock */
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pop3_disconnect, /* disconnect */
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PORT_POP3S, /* defport */
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PROT_POP3 | PROT_POP3S | PROT_SSL /* protocol */
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};
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#endif
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#ifndef CURL_DISABLE_HTTP
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/*
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* HTTP-proxyed POP3 protocol handler.
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*/
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static const struct Curl_handler Curl_handler_pop3_proxy = {
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"POP3", /* scheme */
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ZERO_NULL, /* setup_connection */
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Curl_http, /* do_it */
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Curl_http_done, /* done */
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ZERO_NULL, /* do_more */
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ZERO_NULL, /* connect_it */
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ZERO_NULL, /* connecting */
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ZERO_NULL, /* doing */
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ZERO_NULL, /* proto_getsock */
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ZERO_NULL, /* doing_getsock */
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ZERO_NULL, /* perform_getsock */
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ZERO_NULL, /* disconnect */
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PORT_POP3, /* defport */
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PROT_HTTP /* protocol */
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};
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#ifdef USE_SSL
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/*
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* HTTP-proxyed POP3S protocol handler.
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*/
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static const struct Curl_handler Curl_handler_pop3s_proxy = {
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"POP3S", /* scheme */
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ZERO_NULL, /* setup_connection */
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Curl_http, /* do_it */
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Curl_http_done, /* done */
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ZERO_NULL, /* do_more */
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ZERO_NULL, /* connect_it */
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ZERO_NULL, /* connecting */
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ZERO_NULL, /* doing */
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ZERO_NULL, /* proto_getsock */
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ZERO_NULL, /* doing_getsock */
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ZERO_NULL, /* perform_getsock */
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ZERO_NULL, /* disconnect */
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PORT_POP3S, /* defport */
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PROT_HTTP /* protocol */
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};
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#endif
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#endif
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/* function that checks for a pop3 status code at the start of the given
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string */
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static int pop3_endofresp(struct pingpong *pp,
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int *resp)
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{
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char *line = pp->linestart_resp;
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size_t len = pp->nread_resp;
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if( ((len >= 3) && !memcmp("+OK", line, 3)) ||
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((len >= 4) && !memcmp("-ERR", line, 4)) ) {
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*resp=line[1]; /* O or E */
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return TRUE;
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}
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return FALSE; /* nothing for us */
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}
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/* This is the ONLY way to change POP3 state! */
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static void state(struct connectdata *conn,
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pop3state newstate)
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{
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#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
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/* for debug purposes */
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static const char * const names[]={
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"STOP",
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"SERVERGREET",
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"USER",
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"PASS",
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"STARTTLS",
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"LIST",
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"RETR",
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"QUIT",
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/* LAST */
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};
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#endif
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
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if(pop3c->state != newstate)
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infof(conn->data, "POP3 %p state change from %s to %s\n",
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pop3c, names[pop3c->state], names[newstate]);
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#endif
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pop3c->state = newstate;
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}
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static CURLcode pop3_state_user(struct connectdata *conn)
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{
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CURLcode result;
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struct FTP *pop3 = conn->data->state.proto.pop3;
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/* send USER */
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result = Curl_pp_sendf(&conn->proto.pop3c.pp, "USER %s",
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pop3->user?pop3->user:"");
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if(result)
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return result;
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state(conn, POP3_USER);
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return CURLE_OK;
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}
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/* For the POP3 "protocol connect" and "doing" phases only */
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static int pop3_getsock(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks)
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{
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return Curl_pp_getsock(&conn->proto.pop3c.pp, socks, numsocks);
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}
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/* for STARTTLS responses */
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static CURLcode pop3_state_starttls_resp(struct connectdata *conn,
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int pop3code,
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pop3state instate)
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{
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CURLcode result = CURLE_OK;
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struct SessionHandle *data = conn->data;
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(void)instate; /* no use for this yet */
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if(pop3code != 'O') {
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failf(data, "STARTTLS denied. %c", pop3code);
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result = CURLE_LOGIN_DENIED;
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}
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else {
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/* Curl_ssl_connect is BLOCKING */
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result = Curl_ssl_connect(conn, FIRSTSOCKET);
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if(CURLE_OK == result) {
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conn->protocol |= PROT_POP3S;
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result = pop3_state_user(conn);
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}
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}
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state(conn, POP3_STOP);
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return result;
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}
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/* for USER responses */
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static CURLcode pop3_state_user_resp(struct connectdata *conn,
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int pop3code,
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pop3state instate)
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{
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CURLcode result = CURLE_OK;
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struct SessionHandle *data = conn->data;
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struct FTP *pop3 = data->state.proto.pop3;
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(void)instate; /* no use for this yet */
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if(pop3code != 'O') {
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failf(data, "Access denied. %c", pop3code);
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result = CURLE_LOGIN_DENIED;
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}
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else
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/* send PASS */
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result = Curl_pp_sendf(&conn->proto.pop3c.pp, "PASS %s",
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pop3->passwd?pop3->passwd:"");
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if(result)
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return result;
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state(conn, POP3_PASS);
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return result;
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}
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/* for PASS responses */
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static CURLcode pop3_state_pass_resp(struct connectdata *conn,
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int pop3code,
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pop3state instate)
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{
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CURLcode result = CURLE_OK;
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struct SessionHandle *data = conn->data;
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(void)instate; /* no use for this yet */
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if(pop3code != 'O') {
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failf(data, "Access denied. %c", pop3code);
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result = CURLE_LOGIN_DENIED;
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}
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state(conn, POP3_STOP);
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return result;
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}
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/* for the retr response */
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static CURLcode pop3_state_retr_resp(struct connectdata *conn,
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int pop3code,
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pop3state instate)
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{
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CURLcode result = CURLE_OK;
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struct SessionHandle *data = conn->data;
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struct FTP *pop3 = data->state.proto.pop3;
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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struct pingpong *pp = &pop3c->pp;
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(void)instate; /* no use for this yet */
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if('O' != pop3code) {
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state(conn, POP3_STOP);
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return CURLE_RECV_ERROR;
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}
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/* POP3 download */
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result=Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE,
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pop3->bytecountp,
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-1, NULL); /* no upload here */
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if(pp->cache) {
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/* At this point there is a bunch of data in the header "cache" that is
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actually body content, send it as body and then skip it. Do note
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that there may even be additional "headers" after the body. */
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/* we may get the EOB already here! */
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result = Curl_pop3_write(conn, pp->cache, pp->cache_size);
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if(result)
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return result;
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/* cache is drained */
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free(pp->cache);
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pp->cache = NULL;
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pp->cache_size = 0;
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}
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state(conn, POP3_STOP);
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return result;
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}
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/* for the list response */
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static CURLcode pop3_state_list_resp(struct connectdata *conn,
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int pop3code,
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pop3state instate)
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{
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CURLcode result = CURLE_OK;
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struct SessionHandle *data = conn->data;
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struct FTP *pop3 = data->state.proto.pop3;
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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struct pingpong *pp = &pop3c->pp;
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(void)instate; /* no use for this yet */
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if('O' != pop3code) {
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state(conn, POP3_STOP);
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return CURLE_RECV_ERROR;
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}
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/* POP3 download */
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result=Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE,
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pop3->bytecountp,
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-1, NULL); /* no upload here */
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if(pp->cache) {
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/* cache holds the email ID listing */
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/* we may get the EOB already here! */
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result = Curl_pop3_write(conn, pp->cache, pp->cache_size);
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if(result)
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return result;
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/* cache is drained */
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free(pp->cache);
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pp->cache = NULL;
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pp->cache_size = 0;
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}
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state(conn, POP3_STOP);
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return result;
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}
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/* start the DO phase for RETR */
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static CURLcode pop3_retr(struct connectdata *conn)
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{
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CURLcode result = CURLE_OK;
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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result = Curl_pp_sendf(&conn->proto.pop3c.pp, "RETR %s", pop3c->mailbox);
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if(result)
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return result;
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state(conn, POP3_RETR);
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return result;
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}
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/* start the DO phase for LIST */
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static CURLcode pop3_list(struct connectdata *conn)
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{
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CURLcode result = CURLE_OK;
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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result = Curl_pp_sendf(&conn->proto.pop3c.pp, "LIST %s", pop3c->mailbox);
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if(result)
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return result;
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state(conn, POP3_LIST);
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return result;
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}
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static CURLcode pop3_statemach_act(struct connectdata *conn)
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{
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CURLcode result;
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curl_socket_t sock = conn->sock[FIRSTSOCKET];
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struct SessionHandle *data=conn->data;
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int pop3code;
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struct pop3_conn *pop3c = &conn->proto.pop3c;
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struct pingpong *pp = &pop3c->pp;
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size_t nread = 0;
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if(pp->sendleft)
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return Curl_pp_flushsend(pp);
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/* we read a piece of response */
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result = Curl_pp_readresp(sock, pp, &pop3code, &nread);
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if(result)
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return result;
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if(pop3code) {
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/* we have now received a full POP3 server response */
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switch(pop3c->state) {
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case POP3_SERVERGREET:
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if(pop3code != 'O') {
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failf(data, "Got unexpected pop3-server response");
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return CURLE_FTP_WEIRD_SERVER_REPLY;
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}
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if(data->set.ftp_ssl && !conn->ssl[FIRSTSOCKET].use) {
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/* We don't have a SSL/TLS connection yet, but SSL is requested. Switch
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to TLS connection now */
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result = Curl_pp_sendf(&pop3c->pp, "STARTTLS", NULL);
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state(conn, POP3_STARTTLS);
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}
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else
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result = pop3_state_user(conn);
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if(result)
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return result;
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break;
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case POP3_USER:
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result = pop3_state_user_resp(conn, pop3code, pop3c->state);
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break;
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case POP3_PASS:
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result = pop3_state_pass_resp(conn, pop3code, pop3c->state);
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break;
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case POP3_STARTTLS:
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result = pop3_state_starttls_resp(conn, pop3code, pop3c->state);
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break;
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case POP3_RETR:
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result = pop3_state_retr_resp(conn, pop3code, pop3c->state);
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break;
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case POP3_LIST:
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result = pop3_state_list_resp(conn, pop3code, pop3c->state);
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break;
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case POP3_QUIT:
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/* fallthrough, just stop! */
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default:
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/* internal error */
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state(conn, POP3_STOP);
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break;
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}
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}
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return result;
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}
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/* called repeatedly until done from multi.c */
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static CURLcode pop3_multi_statemach(struct connectdata *conn, bool *done)
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{
|
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struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
CURLcode result = Curl_pp_multi_statemach(&pop3c->pp);
|
|
|
|
*done = (bool)(pop3c->state == POP3_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode pop3_easy_statemach(struct connectdata *conn)
|
|
{
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
struct pingpong *pp = &pop3c->pp;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
while(pop3c->state != POP3_STOP) {
|
|
result = Curl_pp_easy_statemach(pp);
|
|
if(result)
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize the struct POP3 for the current SessionHandle. If
|
|
* need be.
|
|
*/
|
|
static CURLcode pop3_init(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *pop3 = data->state.proto.pop3;
|
|
if(!pop3) {
|
|
pop3 = data->state.proto.pop3 = calloc(sizeof(struct FTP), 1);
|
|
if(!pop3)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
|
|
/* get some initial data into the pop3 struct */
|
|
pop3->bytecountp = &data->req.bytecount;
|
|
|
|
/* No need to duplicate user+password, the connectdata struct won't change
|
|
during a session, but we re-init them here since on subsequent inits
|
|
since the conn struct may have changed or been replaced.
|
|
*/
|
|
pop3->user = conn->user;
|
|
pop3->passwd = conn->passwd;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* pop3_connect() should do everything that is to be considered a part of
|
|
* the connection phase.
|
|
*
|
|
* The variable 'done' points to will be TRUE if the protocol-layer connect
|
|
* phase is done when this function returns, or FALSE is not. When called as
|
|
* a part of the easy interface, it will always be TRUE.
|
|
*/
|
|
static CURLcode pop3_connect(struct connectdata *conn,
|
|
bool *done) /* see description above */
|
|
{
|
|
CURLcode result;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
struct SessionHandle *data=conn->data;
|
|
struct pingpong *pp = &pop3c->pp;
|
|
|
|
*done = FALSE; /* default to not done yet */
|
|
|
|
/* If there already is a protocol-specific struct allocated for this
|
|
sessionhandle, deal with it */
|
|
Curl_reset_reqproto(conn);
|
|
|
|
result = pop3_init(conn);
|
|
if(CURLE_OK != result)
|
|
return result;
|
|
|
|
/* We always support persistant connections on pop3 */
|
|
conn->bits.close = FALSE;
|
|
|
|
pp->response_time = RESP_TIMEOUT; /* set default response time-out */
|
|
pp->statemach_act = pop3_statemach_act;
|
|
pp->endofresp = pop3_endofresp;
|
|
pp->conn = conn;
|
|
|
|
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_PROXY)
|
|
if(conn->bits.tunnel_proxy && conn->bits.httpproxy) {
|
|
/* for POP3 over HTTP proxy */
|
|
struct HTTP http_proxy;
|
|
struct FTP *pop3_save;
|
|
|
|
/* BLOCKING */
|
|
/* We want "seamless" POP3 operations through HTTP proxy tunnel */
|
|
|
|
/* Curl_proxyCONNECT is based on a pointer to a struct HTTP at the member
|
|
* conn->proto.http; we want POP3 through HTTP and we have to change the
|
|
* member temporarily for connecting to the HTTP proxy. After
|
|
* Curl_proxyCONNECT we have to set back the member to the original struct
|
|
* POP3 pointer
|
|
*/
|
|
pop3_save = data->state.proto.pop3;
|
|
memset(&http_proxy, 0, sizeof(http_proxy));
|
|
data->state.proto.http = &http_proxy;
|
|
|
|
result = Curl_proxyCONNECT(conn, FIRSTSOCKET,
|
|
conn->host.name, conn->remote_port);
|
|
|
|
data->state.proto.pop3 = pop3_save;
|
|
|
|
if(CURLE_OK != result)
|
|
return result;
|
|
}
|
|
#endif /* !CURL_DISABLE_HTTP && !CURL_DISABLE_PROXY */
|
|
|
|
if(conn->protocol & PROT_POP3S) {
|
|
/* BLOCKING */
|
|
/* POP3S is simply pop3 with SSL for the control channel */
|
|
/* now, perform the SSL initialization for this socket */
|
|
result = Curl_ssl_connect(conn, FIRSTSOCKET);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
Curl_pp_init(pp); /* init the response reader stuff */
|
|
|
|
/* When we connect, we start in the state where we await the server greet
|
|
response */
|
|
state(conn, POP3_SERVERGREET);
|
|
|
|
if(data->state.used_interface == Curl_if_multi)
|
|
result = pop3_multi_statemach(conn, done);
|
|
else {
|
|
result = pop3_easy_statemach(conn);
|
|
if(!result)
|
|
*done = TRUE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_done()
|
|
*
|
|
* The DONE function. This does what needs to be done after a single DO has
|
|
* performed.
|
|
*
|
|
* Input argument is already checked for validity.
|
|
*/
|
|
static CURLcode pop3_done(struct connectdata *conn, CURLcode status,
|
|
bool premature)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *pop3 = data->state.proto.pop3;
|
|
CURLcode result=CURLE_OK;
|
|
(void)premature;
|
|
|
|
if(!pop3)
|
|
/* When the easy handle is removed from the multi while libcurl is still
|
|
* trying to resolve the host name, it seems that the pop3 struct is not
|
|
* yet initialized, but the removal action calls Curl_done() which calls
|
|
* this function. So we simply return success if no pop3 pointer is set.
|
|
*/
|
|
return CURLE_OK;
|
|
|
|
if(status) {
|
|
conn->bits.close = TRUE; /* marked for closure */
|
|
result = status; /* use the already set error code */
|
|
}
|
|
|
|
/* clear these for next connection */
|
|
pop3->transfer = FTPTRANSFER_BODY;
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_perform()
|
|
*
|
|
* This is the actual DO function for POP3. Get a file/directory according to
|
|
* the options previously setup.
|
|
*/
|
|
|
|
static
|
|
CURLcode pop3_perform(struct connectdata *conn,
|
|
bool *connected, /* connect status after PASV / PORT */
|
|
bool *dophase_done)
|
|
{
|
|
/* this is POP3 and no proxy */
|
|
CURLcode result=CURLE_OK;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
|
|
DEBUGF(infof(conn->data, "DO phase starts\n"));
|
|
|
|
if(conn->data->set.opt_no_body) {
|
|
/* requested no body means no transfer... */
|
|
struct FTP *pop3 = conn->data->state.proto.pop3;
|
|
pop3->transfer = FTPTRANSFER_INFO;
|
|
}
|
|
|
|
*dophase_done = FALSE; /* not done yet */
|
|
|
|
/* start the first command in the DO phase */
|
|
/* If mailbox is empty, then assume user wants listing for mail IDs,
|
|
* otherwise, attempt to retrieve the mail-id stored in mailbox
|
|
*/
|
|
if (strlen(pop3c->mailbox))
|
|
result = pop3_retr(conn);
|
|
else
|
|
result = pop3_list(conn);
|
|
if(result)
|
|
return result;
|
|
|
|
/* run the state-machine */
|
|
if(conn->data->state.used_interface == Curl_if_multi)
|
|
result = pop3_multi_statemach(conn, dophase_done);
|
|
else {
|
|
result = pop3_easy_statemach(conn);
|
|
*dophase_done = TRUE; /* with the easy interface we are done here */
|
|
}
|
|
*connected = conn->bits.tcpconnect;
|
|
|
|
if(*dophase_done)
|
|
DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_do()
|
|
*
|
|
* This function is registered as 'curl_do' function. It decodes the path
|
|
* parts etc as a wrapper to the actual DO function (pop3_perform).
|
|
*
|
|
* The input argument is already checked for validity.
|
|
*/
|
|
static CURLcode pop3_do(struct connectdata *conn, bool *done)
|
|
{
|
|
CURLcode retcode = CURLE_OK;
|
|
|
|
*done = FALSE; /* default to false */
|
|
|
|
/*
|
|
Since connections can be re-used between SessionHandles, this might be a
|
|
connection already existing but on a fresh SessionHandle struct so we must
|
|
make sure we have a good 'struct POP3' to play with. For new connections,
|
|
the struct POP3 is allocated and setup in the pop3_connect() function.
|
|
*/
|
|
Curl_reset_reqproto(conn);
|
|
retcode = pop3_init(conn);
|
|
if(retcode)
|
|
return retcode;
|
|
|
|
retcode = pop3_parse_url_path(conn);
|
|
if(retcode)
|
|
return retcode;
|
|
|
|
retcode = pop3_regular_transfer(conn, done);
|
|
|
|
return retcode;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_quit()
|
|
*
|
|
* This should be called before calling sclose(). We should then wait for the
|
|
* response from the server before returning. The calling code should then try
|
|
* to close the connection.
|
|
*
|
|
*/
|
|
static CURLcode pop3_quit(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "QUIT", NULL);
|
|
if(result)
|
|
return result;
|
|
state(conn, POP3_QUIT);
|
|
|
|
result = pop3_easy_statemach(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_disconnect()
|
|
*
|
|
* Disconnect from an POP3 server. Cleanup protocol-specific per-connection
|
|
* resources. BLOCKING.
|
|
*/
|
|
static CURLcode pop3_disconnect(struct connectdata *conn)
|
|
{
|
|
struct pop3_conn *pop3c= &conn->proto.pop3c;
|
|
|
|
/* We cannot send quit unconditionally. If this connection is stale or
|
|
bad in any way, sending quit and waiting around here will make the
|
|
disconnect wait in vain and cause more problems than we need to.
|
|
*/
|
|
|
|
/* The POP3 session may or may not have been allocated/setup at this
|
|
point! */
|
|
(void)pop3_quit(conn); /* ignore errors on the LOGOUT */
|
|
|
|
|
|
Curl_pp_disconnect(&pop3c->pp);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_parse_url_path()
|
|
*
|
|
* Parse the URL path into separate path components.
|
|
*
|
|
*/
|
|
static CURLcode pop3_parse_url_path(struct connectdata *conn)
|
|
{
|
|
/* the pop3 struct is already inited in pop3_connect() */
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
struct SessionHandle *data = conn->data;
|
|
const char *path = data->state.path;
|
|
int len;
|
|
|
|
/* url decode the path and use this mailbox */
|
|
pop3c->mailbox = curl_easy_unescape(data, path, 0, &len);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* call this when the DO phase has completed */
|
|
static CURLcode pop3_dophase_done(struct connectdata *conn,
|
|
bool connected)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct FTP *pop3 = conn->data->state.proto.pop3;
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
(void)connected;
|
|
|
|
if(pop3->transfer != FTPTRANSFER_BODY)
|
|
/* no data to transfer */
|
|
result=Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
|
|
|
free(pop3c->mailbox);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* called from multi.c while DOing */
|
|
static CURLcode pop3_doing(struct connectdata *conn,
|
|
bool *dophase_done)
|
|
{
|
|
CURLcode result;
|
|
result = pop3_multi_statemach(conn, dophase_done);
|
|
|
|
if(*dophase_done) {
|
|
result = pop3_dophase_done(conn, FALSE /* not connected */);
|
|
|
|
DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* pop3_regular_transfer()
|
|
*
|
|
* The input argument is already checked for validity.
|
|
*
|
|
* Performs all commands done before a regular transfer between a local and a
|
|
* remote host.
|
|
*
|
|
*/
|
|
static
|
|
CURLcode pop3_regular_transfer(struct connectdata *conn,
|
|
bool *dophase_done)
|
|
{
|
|
CURLcode result=CURLE_OK;
|
|
bool connected=FALSE;
|
|
struct SessionHandle *data = conn->data;
|
|
data->req.size = -1; /* make sure this is unknown at this point */
|
|
|
|
Curl_pgrsSetUploadCounter(data, 0);
|
|
Curl_pgrsSetDownloadCounter(data, 0);
|
|
Curl_pgrsSetUploadSize(data, 0);
|
|
Curl_pgrsSetDownloadSize(data, 0);
|
|
|
|
result = pop3_perform(conn,
|
|
&connected, /* have we connected after PASV/PORT */
|
|
dophase_done); /* all commands in the DO-phase done? */
|
|
|
|
if(CURLE_OK == result) {
|
|
|
|
if(!*dophase_done)
|
|
/* the DO phase has not completed yet */
|
|
return CURLE_OK;
|
|
|
|
result = pop3_dophase_done(conn, connected);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode pop3_setup_connection(struct connectdata * conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
|
|
/* Unless we have asked to tunnel pop3 operations through the proxy, we
|
|
switch and use HTTP operations only */
|
|
#ifndef CURL_DISABLE_HTTP
|
|
if(conn->handler == &Curl_handler_pop3)
|
|
conn->handler = &Curl_handler_pop3_proxy;
|
|
else {
|
|
#ifdef USE_SSL
|
|
conn->handler = &Curl_handler_pop3s_proxy;
|
|
#else
|
|
failf(data, "POP3S not supported!");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
#endif
|
|
}
|
|
/*
|
|
* We explicitly mark this connection as persistent here as we're doing
|
|
* POP3 over HTTP and thus we accidentally avoid setting this value
|
|
* otherwise.
|
|
*/
|
|
conn->bits.close = FALSE;
|
|
#else
|
|
failf(data, "POP3 over http proxy requires HTTP support built-in!");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
#endif
|
|
}
|
|
|
|
data->state.path++; /* don't include the initial slash */
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* this is the 5-bytes End-Of-Body marker for POP3 */
|
|
#define POP3_EOB "\x0d\x0a\x2e\x0d\x0a"
|
|
#define POP3_EOB_LEN 5
|
|
|
|
/*
|
|
* This function scans the body after the end-of-body and writes everything
|
|
* until the end is found.
|
|
*/
|
|
CURLcode Curl_pop3_write(struct connectdata *conn,
|
|
char *str,
|
|
size_t nread)
|
|
{
|
|
/* This code could be made into a special function in the handler struct. */
|
|
CURLcode result;
|
|
struct SessionHandle *data = conn->data;
|
|
struct SingleRequest *k = &data->req;
|
|
|
|
/* Detect the end-of-body marker, which is 5 bytes:
|
|
0d 0a 2e 0d 0a. This marker can of course be spread out
|
|
over up to 5 different data chunks. Deal with it! */
|
|
struct pop3_conn *pop3c = &conn->proto.pop3c;
|
|
size_t checkmax = (nread >= POP3_EOB_LEN?POP3_EOB_LEN:nread);
|
|
size_t checkleft = POP3_EOB_LEN-pop3c->eob;
|
|
size_t check = (checkmax >= checkleft?checkleft:checkmax);
|
|
|
|
if(!memcmp(POP3_EOB, &str[nread - check], check)) {
|
|
/* substring match */
|
|
pop3c->eob += check;
|
|
if(pop3c->eob == POP3_EOB_LEN) {
|
|
/* full match, the transfer is done! */
|
|
str[nread - check] = '\0';
|
|
nread -= check;
|
|
k->keepon &= ~KEEP_RECV;
|
|
pop3c->eob = 0;
|
|
}
|
|
}
|
|
else if(pop3c->eob) {
|
|
/* not a match, but we matched a piece before so we must now
|
|
send that part as body first, before we move on and send
|
|
this buffer */
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY,
|
|
(char *)POP3_EOB, pop3c->eob);
|
|
if(result)
|
|
return result;
|
|
pop3c->eob = 0;
|
|
}
|
|
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY, str, nread);
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif /* CURL_DISABLE_POP3 */
|