1106 lines
31 KiB
C
1106 lines
31 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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* RFC2821 SMTP protocol
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* RFC3207 SMTP over TLS
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*
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***************************************************************************/
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#include "setup.h"
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#ifndef CURL_DISABLE_SMTP
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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 "smtp.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 smtp_regular_transfer(struct connectdata *conn, bool *done);
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static CURLcode smtp_do(struct connectdata *conn, bool *done);
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static CURLcode smtp_done(struct connectdata *conn,
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CURLcode, bool premature);
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static CURLcode smtp_connect(struct connectdata *conn, bool *done);
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static CURLcode smtp_disconnect(struct connectdata *conn);
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static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done);
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static int smtp_getsock(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks);
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static CURLcode smtp_doing(struct connectdata *conn,
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bool *dophase_done);
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static CURLcode smtp_setup_connection(struct connectdata * conn);
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/*
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* SMTP protocol handler.
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*/
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const struct Curl_handler Curl_handler_smtp = {
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"SMTP", /* scheme */
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smtp_setup_connection, /* setup_connection */
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smtp_do, /* do_it */
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smtp_done, /* done */
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ZERO_NULL, /* do_more */
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smtp_connect, /* connect_it */
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smtp_multi_statemach, /* connecting */
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smtp_doing, /* doing */
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smtp_getsock, /* proto_getsock */
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smtp_getsock, /* doing_getsock */
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ZERO_NULL, /* perform_getsock */
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smtp_disconnect, /* disconnect */
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PORT_SMTP, /* defport */
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PROT_SMTP /* protocol */
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};
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#ifdef USE_SSL
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/*
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* SMTPS protocol handler.
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*/
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const struct Curl_handler Curl_handler_smtps = {
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"SMTPS", /* scheme */
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smtp_setup_connection, /* setup_connection */
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smtp_do, /* do_it */
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smtp_done, /* done */
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ZERO_NULL, /* do_more */
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smtp_connect, /* connect_it */
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smtp_multi_statemach, /* connecting */
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smtp_doing, /* doing */
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smtp_getsock, /* proto_getsock */
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smtp_getsock, /* doing_getsock */
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ZERO_NULL, /* perform_getsock */
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smtp_disconnect, /* disconnect */
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PORT_SMTPS, /* defport */
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PROT_SMTP | PROT_SMTPS | 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 SMTP protocol handler.
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*/
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static const struct Curl_handler Curl_handler_smtp_proxy = {
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"SMTP", /* 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_SMTP, /* 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 SMTPS protocol handler.
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*/
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static const struct Curl_handler Curl_handler_smtps_proxy = {
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"SMTPS", /* 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_SMTPS, /* 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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/* fucntion that checks for an ending smtp status code at the start of the
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given string */
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static int smtp_endofresp(struct pingpong *pp, 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 >= 4) && (' ' == line[3]) &&
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ISDIGIT(line[0]) && ISDIGIT(line[1]) && ISDIGIT(line[2])) {
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*resp=atoi(line);
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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 SMTP state! */
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static void state(struct connectdata *conn,
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smtpstate 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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"EHLO",
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"HELO",
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"STARTTLS",
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"MAIL",
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"RCPT",
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"DATA",
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"POSTDATA",
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"QUIT",
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/* LAST */
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};
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#endif
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struct smtp_conn *smtpc = &conn->proto.smtpc;
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#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
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if(smtpc->state != newstate)
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infof(conn->data, "SMTP %p state change from %s to %s\n",
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smtpc, names[smtpc->state], names[newstate]);
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#endif
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smtpc->state = newstate;
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}
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static CURLcode smtp_state_ehlo(struct connectdata *conn)
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{
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CURLcode result;
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struct smtp_conn *smtpc = &conn->proto.smtpc;
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/* send EHLO */
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result = Curl_pp_sendf(&conn->proto.smtpc.pp, "EHLO %s", smtpc->domain);
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if(result)
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return result;
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state(conn, SMTP_EHLO);
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return CURLE_OK;
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}
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static CURLcode smtp_state_helo(struct connectdata *conn)
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{
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CURLcode result;
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struct smtp_conn *smtpc = &conn->proto.smtpc;
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/* send HELO */
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result = Curl_pp_sendf(&conn->proto.smtpc.pp, "HELO %s", smtpc->domain);
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if(result)
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return result;
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state(conn, SMTP_HELO);
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return CURLE_OK;
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}
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/* For the SMTP "protocol connect" and "doing" phases only */
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static int smtp_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.smtpc.pp, socks, numsocks);
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}
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/* for STARTTLS responses */
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static CURLcode smtp_state_starttls_resp(struct connectdata *conn,
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int smtpcode,
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smtpstate 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(smtpcode != 220) {
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if(data->set.ftp_ssl == CURLUSESSL_TRY)
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state(conn, SMTP_STOP);
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else {
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failf(data, "STARTTLS denied. %c", smtpcode);
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result = CURLE_LOGIN_DENIED;
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}
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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_SMTPS;
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result = smtp_state_ehlo(conn);
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}
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}
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return result;
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}
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/* for EHLO responses */
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static CURLcode smtp_state_ehlo_resp(struct connectdata *conn,
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int smtpcode,
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smtpstate 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(smtpcode/100 != 2) {
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if(data->set.ftp_ssl <= CURLUSESSL_TRY)
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result = smtp_state_helo(conn);
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else {
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failf(data, "Access denied: %d", smtpcode);
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result = CURLE_LOGIN_DENIED;
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}
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}
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else 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(&conn->proto.smtpc.pp, "STARTTLS", NULL);
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state(conn, SMTP_STARTTLS);
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}
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else {
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/* end the connect phase */
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state(conn, SMTP_STOP);
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}
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return result;
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}
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/* for HELO responses */
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static CURLcode smtp_state_helo_resp(struct connectdata *conn,
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int smtpcode,
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smtpstate 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(smtpcode/100 != 2) {
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failf(data, "Access denied: %d", smtpcode);
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result = CURLE_LOGIN_DENIED;
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}
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else {
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/* end the connect phase */
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state(conn, SMTP_STOP);
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}
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return result;
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}
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/* start the DO phase */
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static CURLcode smtp_mail(struct connectdata *conn)
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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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/* send MAIL */
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result = Curl_pp_sendf(&conn->proto.smtpc.pp, "MAIL FROM:%s",
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data->set.str[STRING_MAIL_FROM]);
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if(result)
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return result;
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state(conn, SMTP_MAIL);
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return result;
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}
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static CURLcode smtp_rcpt_to(struct connectdata *conn)
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{
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CURLcode result = CURLE_OK;
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struct smtp_conn *smtpc = &conn->proto.smtpc;
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/* send RCPT TO */
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if(smtpc->rcpt) {
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if(smtpc->rcpt->data[0] == '<')
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result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:%s",
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smtpc->rcpt->data);
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else
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result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:<%s>",
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smtpc->rcpt->data);
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if(!result)
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state(conn, SMTP_RCPT);
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}
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return result;
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}
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/* for MAIL responses */
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static CURLcode smtp_state_mail_resp(struct connectdata *conn,
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int smtpcode,
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smtpstate 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(smtpcode/100 != 2) {
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failf(data, "Access denied: %d", smtpcode);
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result = CURLE_LOGIN_DENIED;
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state(conn, SMTP_STOP);
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}
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else {
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struct smtp_conn *smtpc = &conn->proto.smtpc;
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smtpc->rcpt = data->set.mail_rcpt;
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result = smtp_rcpt_to(conn);
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}
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return result;
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}
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/* for RCPT responses */
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static CURLcode smtp_state_rcpt_resp(struct connectdata *conn,
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int smtpcode,
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smtpstate 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(smtpcode/100 != 2) {
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failf(data, "Access denied: %d", smtpcode);
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result = CURLE_LOGIN_DENIED;
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state(conn, SMTP_STOP);
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}
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else {
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struct smtp_conn *smtpc = &conn->proto.smtpc;
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if(smtpc->rcpt) {
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smtpc->rcpt = smtpc->rcpt->next;
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result = smtp_rcpt_to(conn);
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/* if we failed or still is in RCPT sending, return */
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if(result || smtpc->rcpt)
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return result;
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}
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/* send DATA */
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result = Curl_pp_sendf(&conn->proto.smtpc.pp, "DATA", "");
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if(result)
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return result;
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state(conn, SMTP_DATA);
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}
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return result;
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}
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/* for the DATA response */
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static CURLcode smtp_state_data_resp(struct connectdata *conn,
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int smtpcode,
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smtpstate 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 *smtp = data->state.proto.smtp;
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(void)instate; /* no use for this yet */
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if(smtpcode != 354) {
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state(conn, SMTP_STOP);
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return CURLE_RECV_ERROR;
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}
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/* SMTP upload */
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result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, /* no download */
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FIRSTSOCKET, smtp->bytecountp);
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state(conn, SMTP_STOP);
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return result;
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}
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/* for the POSTDATA response, which is received after the entire DATA
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part has been sent off to the server */
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static CURLcode smtp_state_postdata_resp(struct connectdata *conn,
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int smtpcode,
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smtpstate instate)
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{
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CURLcode result = CURLE_OK;
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(void)instate; /* no use for this yet */
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if(smtpcode != 250)
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result = CURLE_RECV_ERROR;
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state(conn, SMTP_STOP);
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return result;
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}
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static CURLcode smtp_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 smtpcode;
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struct smtp_conn *smtpc = &conn->proto.smtpc;
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struct pingpong *pp = &smtpc->pp;
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size_t nread = 0;
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if(pp->sendleft)
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/* we have a piece of a command still left to send */
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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, &smtpcode, &nread);
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if(result)
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return result;
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if(smtpcode) {
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/* we have now received a full SMTP server response */
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switch(smtpc->state) {
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case SMTP_SERVERGREET:
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if(smtpcode/100 != 2) {
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failf(data, "Got unexpected smtp-server response: %d", smtpcode);
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return CURLE_FTP_WEIRD_SERVER_REPLY;
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}
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result = smtp_state_ehlo(conn);
|
|
if(result)
|
|
return result;
|
|
break;
|
|
|
|
case SMTP_EHLO:
|
|
result = smtp_state_ehlo_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_HELO:
|
|
result = smtp_state_helo_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_MAIL:
|
|
result = smtp_state_mail_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_RCPT:
|
|
result = smtp_state_rcpt_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_STARTTLS:
|
|
result = smtp_state_starttls_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_DATA:
|
|
result = smtp_state_data_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_POSTDATA:
|
|
result = smtp_state_postdata_resp(conn, smtpcode, smtpc->state);
|
|
break;
|
|
|
|
case SMTP_QUIT:
|
|
/* fallthrough, just stop! */
|
|
default:
|
|
/* internal error */
|
|
state(conn, SMTP_STOP);
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* called repeatedly until done from multi.c */
|
|
static CURLcode smtp_multi_statemach(struct connectdata *conn,
|
|
bool *done)
|
|
{
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
CURLcode result = Curl_pp_multi_statemach(&smtpc->pp);
|
|
|
|
*done = (bool)(smtpc->state == SMTP_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode smtp_easy_statemach(struct connectdata *conn)
|
|
{
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
struct pingpong *pp = &smtpc->pp;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
while(smtpc->state != SMTP_STOP) {
|
|
result = Curl_pp_easy_statemach(pp);
|
|
if(result)
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize the struct SMTP for the current SessionHandle. If
|
|
* need be.
|
|
*/
|
|
static CURLcode smtp_init(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *smtp = data->state.proto.smtp;
|
|
if(!smtp) {
|
|
smtp = data->state.proto.smtp = calloc(sizeof(struct FTP), 1);
|
|
if(!smtp)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
|
|
/* get some initial data into the smtp struct */
|
|
smtp->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.
|
|
*/
|
|
smtp->user = conn->user;
|
|
smtp->passwd = conn->passwd;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* smtp_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 smtp_connect(struct connectdata *conn,
|
|
bool *done) /* see description above */
|
|
{
|
|
CURLcode result;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
struct SessionHandle *data=conn->data;
|
|
struct pingpong *pp=&smtpc->pp;
|
|
const char *path = conn->data->state.path;
|
|
int len;
|
|
|
|
#ifdef HAVE_GETHOSTNAME
|
|
char localhost[1024 + 1];
|
|
#endif
|
|
|
|
*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 = smtp_init(conn);
|
|
if(CURLE_OK != result)
|
|
return result;
|
|
|
|
/* We always support persistant connections on smtp */
|
|
conn->bits.close = FALSE;
|
|
|
|
pp->response_time = RESP_TIMEOUT; /* set default response time-out */
|
|
pp->statemach_act = smtp_statemach_act;
|
|
pp->endofresp = smtp_endofresp;
|
|
pp->conn = conn;
|
|
|
|
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_PROXY)
|
|
if(conn->bits.tunnel_proxy && conn->bits.httpproxy) {
|
|
/* for SMTP over HTTP proxy */
|
|
struct HTTP http_proxy;
|
|
struct FTP *smtp_save;
|
|
|
|
/* BLOCKING */
|
|
/* We want "seamless" SMTP operations through HTTP proxy tunnel */
|
|
|
|
/* Curl_proxyCONNECT is based on a pointer to a struct HTTP at the member
|
|
* conn->proto.http; we want SMTP 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
|
|
* SMTP pointer
|
|
*/
|
|
smtp_save = data->state.proto.smtp;
|
|
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.smtp = smtp_save;
|
|
|
|
if(CURLE_OK != result)
|
|
return result;
|
|
}
|
|
#endif /* !CURL_DISABLE_HTTP && !CURL_DISABLE_PROXY */
|
|
|
|
if(conn->protocol & PROT_SMTPS) {
|
|
/* BLOCKING */
|
|
/* SMTPS is simply smtp 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 */
|
|
|
|
pp->response_time = RESP_TIMEOUT; /* set default response time-out */
|
|
pp->statemach_act = smtp_statemach_act;
|
|
pp->endofresp = smtp_endofresp;
|
|
pp->conn = conn;
|
|
|
|
if(!*path) {
|
|
#ifdef HAVE_GETHOSTNAME
|
|
if(!gethostname(localhost, sizeof localhost))
|
|
path = localhost;
|
|
else
|
|
#endif
|
|
path = "localhost";
|
|
}
|
|
|
|
/* url decode the path and use it as domain with EHLO */
|
|
smtpc->domain = curl_easy_unescape(conn->data, path, 0, &len);
|
|
if (!smtpc->domain)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* When we connect, we start in the state where we await the server greeting
|
|
*/
|
|
state(conn, SMTP_SERVERGREET);
|
|
|
|
if(data->state.used_interface == Curl_if_multi)
|
|
result = smtp_multi_statemach(conn, done);
|
|
else {
|
|
result = smtp_easy_statemach(conn);
|
|
if(!result)
|
|
*done = TRUE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_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 smtp_done(struct connectdata *conn, CURLcode status,
|
|
bool premature)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *smtp = data->state.proto.smtp;
|
|
CURLcode result=CURLE_OK;
|
|
ssize_t bytes_written;
|
|
(void)premature;
|
|
|
|
if(!smtp)
|
|
/* When the easy handle is removed from the multi while libcurl is still
|
|
* trying to resolve the host name, it seems that the smtp struct is not
|
|
* yet initialized, but the removal action calls Curl_done() which calls
|
|
* this function. So we simply return success if no smtp pointer is set.
|
|
*/
|
|
return CURLE_OK;
|
|
|
|
if(status) {
|
|
conn->bits.close = TRUE; /* marked for closure */
|
|
result = status; /* use the already set error code */
|
|
}
|
|
else
|
|
/* TODO: make this work even when the socket is EWOULDBLOCK in this call! */
|
|
|
|
/* write to socket (send away data) */
|
|
result = Curl_write(conn,
|
|
conn->writesockfd, /* socket to send to */
|
|
SMTP_EOB, /* buffer pointer */
|
|
SMTP_EOB_LEN, /* buffer size */
|
|
&bytes_written); /* actually sent away */
|
|
|
|
|
|
if(status == CURLE_OK) {
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
struct pingpong *pp= &smtpc->pp;
|
|
pp->response = Curl_tvnow(); /* timeout relative now */
|
|
|
|
state(conn, SMTP_POSTDATA);
|
|
/* run the state-machine
|
|
|
|
TODO: when the multi interface is used, this _really_ should be using
|
|
the smtp_multi_statemach function but we have no general support for
|
|
non-blocking DONE operations, not in the multi state machine and with
|
|
Curl_done() invokes on several places in the code!
|
|
*/
|
|
result = smtp_easy_statemach(conn);
|
|
}
|
|
|
|
/* clear these for next connection */
|
|
smtp->transfer = FTPTRANSFER_BODY;
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_perform()
|
|
*
|
|
* This is the actual DO function for SMTP. Get a file/directory according to
|
|
* the options previously setup.
|
|
*/
|
|
|
|
static
|
|
CURLcode smtp_perform(struct connectdata *conn,
|
|
bool *connected, /* connect status after PASV / PORT */
|
|
bool *dophase_done)
|
|
{
|
|
/* this is SMTP and no proxy */
|
|
CURLcode result=CURLE_OK;
|
|
|
|
DEBUGF(infof(conn->data, "DO phase starts\n"));
|
|
|
|
if(conn->data->set.opt_no_body) {
|
|
/* requested no body means no transfer... */
|
|
struct FTP *smtp = conn->data->state.proto.smtp;
|
|
smtp->transfer = FTPTRANSFER_INFO;
|
|
}
|
|
|
|
*dophase_done = FALSE; /* not done yet */
|
|
|
|
/* start the first command in the DO phase */
|
|
result = smtp_mail(conn);
|
|
if(result)
|
|
return result;
|
|
|
|
/* run the state-machine */
|
|
if(conn->data->state.used_interface == Curl_if_multi)
|
|
result = smtp_multi_statemach(conn, dophase_done);
|
|
else {
|
|
result = smtp_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;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_do()
|
|
*
|
|
* This function is registered as 'curl_do' function. It decodes the path
|
|
* parts etc as a wrapper to the actual DO function (smtp_perform).
|
|
*
|
|
* The input argument is already checked for validity.
|
|
*/
|
|
static CURLcode smtp_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 SMTP' to play with. For new connections,
|
|
the struct SMTP is allocated and setup in the smtp_connect() function.
|
|
*/
|
|
Curl_reset_reqproto(conn);
|
|
retcode = smtp_init(conn);
|
|
if(retcode)
|
|
return retcode;
|
|
|
|
retcode = smtp_regular_transfer(conn, done);
|
|
|
|
return retcode;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_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 smtp_quit(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "QUIT", NULL);
|
|
if(result)
|
|
return result;
|
|
state(conn, SMTP_QUIT);
|
|
|
|
result = smtp_easy_statemach(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_disconnect()
|
|
*
|
|
* Disconnect from an SMTP server. Cleanup protocol-specific per-connection
|
|
* resources. BLOCKING.
|
|
*/
|
|
static CURLcode smtp_disconnect(struct connectdata *conn)
|
|
{
|
|
struct smtp_conn *smtpc= &conn->proto.smtpc;
|
|
|
|
/* 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 SMTP session may or may not have been allocated/setup at this
|
|
point! */
|
|
if (smtpc->pp.conn)
|
|
(void)smtp_quit(conn); /* ignore errors on the LOGOUT */
|
|
|
|
Curl_pp_disconnect(&smtpc->pp);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* call this when the DO phase has completed */
|
|
static CURLcode smtp_dophase_done(struct connectdata *conn,
|
|
bool connected)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct FTP *smtp = conn->data->state.proto.smtp;
|
|
struct smtp_conn *smtpc= &conn->proto.smtpc;
|
|
(void)connected;
|
|
|
|
if(smtp->transfer != FTPTRANSFER_BODY)
|
|
/* no data to transfer */
|
|
result=Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
|
|
|
free(smtpc->domain);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* called from multi.c while DOing */
|
|
static CURLcode smtp_doing(struct connectdata *conn,
|
|
bool *dophase_done)
|
|
{
|
|
CURLcode result;
|
|
result = smtp_multi_statemach(conn, dophase_done);
|
|
|
|
if(*dophase_done) {
|
|
result = smtp_dophase_done(conn, FALSE /* not connected */);
|
|
|
|
DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* smtp_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 smtp_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 = smtp_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 = smtp_dophase_done(conn, connected);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode smtp_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 smtp operations through the proxy, we
|
|
switch and use HTTP operations only */
|
|
#ifndef CURL_DISABLE_HTTP
|
|
if(conn->handler == &Curl_handler_smtp)
|
|
conn->handler = &Curl_handler_smtp_proxy;
|
|
else {
|
|
#ifdef USE_SSL
|
|
conn->handler = &Curl_handler_smtps_proxy;
|
|
#else
|
|
failf(data, "SMTPS not supported!");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
#endif
|
|
}
|
|
/*
|
|
* We explicitly mark this connection as persistent here as we're doing
|
|
* SMTP over HTTP and thus we accidentally avoid setting this value
|
|
* otherwise.
|
|
*/
|
|
conn->bits.close = FALSE;
|
|
#else
|
|
failf(data, "SMTP 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;
|
|
}
|
|
|
|
CURLcode Curl_smtp_escape_eob(struct connectdata *conn, ssize_t nread)
|
|
{
|
|
/* When sending SMTP payload, we must detect CRLF.CRLF sequences in
|
|
* the data and make sure it is sent as CRLF..CRLF instead, as
|
|
* otherwise it will wrongly be detected as end of data by the server.
|
|
*/
|
|
int i;
|
|
int si;
|
|
struct smtp_conn *smtpc = &conn->proto.smtpc;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
if(data->state.scratch == NULL)
|
|
data->state.scratch = malloc(2*BUFSIZE);
|
|
if(data->state.scratch == NULL) {
|
|
failf (data, "Failed to alloc scratch buffer!");
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
/* This loop can be improved by some kind of Boyer-Moore style of
|
|
approach but that is saved for later... */
|
|
for(i = 0, si = 0; i < nread; i++, si++) {
|
|
ssize_t left = nread - i;
|
|
|
|
if(left>= (SMTP_EOB_LEN-smtpc->eob)) {
|
|
if(!memcmp(SMTP_EOB+smtpc->eob, &data->req.upload_fromhere[i],
|
|
SMTP_EOB_LEN-smtpc->eob)) {
|
|
/* It matched, copy the replacement data to the target buffer
|
|
instead. Note that the replacement does not contain the
|
|
trailing CRLF but we instead continue to match on that one
|
|
to deal with repeated sequences. Like CRLF.CRLF.CRLF etc
|
|
*/
|
|
memcpy(&data->state.scratch[si], SMTP_EOB_REPL,
|
|
SMTP_EOB_REPL_LEN);
|
|
si+=SMTP_EOB_REPL_LEN-1; /* minus one since the for() increments
|
|
it */
|
|
i+=SMTP_EOB_LEN-smtpc->eob-1-2;
|
|
smtpc->eob = 0; /* start over */
|
|
continue;
|
|
}
|
|
}
|
|
else if(!memcmp(SMTP_EOB+smtpc->eob, &data->req.upload_fromhere[i],
|
|
left)) {
|
|
/* the last piece of the data matches the EOB so we can't send that
|
|
until we know the rest of it */
|
|
smtpc->eob += left;
|
|
break;
|
|
}
|
|
|
|
data->state.scratch[si] = data->req.upload_fromhere[i];
|
|
} /* for() */
|
|
|
|
if(si != nread) {
|
|
/* only use the new buffer if we replaced something */
|
|
nread = si;
|
|
|
|
/* upload from the new (replaced) buffer instead */
|
|
data->req.upload_fromhere = data->state.scratch;
|
|
|
|
/* set the new amount too */
|
|
data->req.upload_present = nread;
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
#endif /* CURL_DISABLE_SMTP */
|