Initial check in of curl.
Plan to:
- Fix warnings
- Add java support
Change-Id: Ia61d4d479aa61178f2883161491ab844301317e0
diff --git a/lib/smtp.c b/lib/smtp.c
new file mode 100644
index 0000000..654f435
--- /dev/null
+++ b/lib/smtp.c
@@ -0,0 +1,1105 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2010, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * RFC2821 SMTP protocol
+ * RFC3207 SMTP over TLS
+ *
+ ***************************************************************************/
+
+#include "setup.h"
+
+#ifndef CURL_DISABLE_SMTP
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <ctype.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_UTSNAME_H
+#include <sys/utsname.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef __VMS
+#include <in.h>
+#include <inet.h>
+#endif
+
+#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
+#undef in_addr_t
+#define in_addr_t unsigned long
+#endif
+
+#include <curl/curl.h>
+#include "urldata.h"
+#include "sendf.h"
+#include "easyif.h" /* for Curl_convert_... prototypes */
+
+#include "if2ip.h"
+#include "hostip.h"
+#include "progress.h"
+#include "transfer.h"
+#include "escape.h"
+#include "http.h" /* for HTTP proxy tunnel stuff */
+#include "socks.h"
+#include "smtp.h"
+
+#include "strtoofft.h"
+#include "strequal.h"
+#include "sslgen.h"
+#include "connect.h"
+#include "strerror.h"
+#include "select.h"
+#include "multiif.h"
+#include "url.h"
+#include "rawstr.h"
+#include "strtoofft.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/* Local API functions */
+static CURLcode smtp_regular_transfer(struct connectdata *conn, bool *done);
+static CURLcode smtp_do(struct connectdata *conn, bool *done);
+static CURLcode smtp_done(struct connectdata *conn,
+ CURLcode, bool premature);
+static CURLcode smtp_connect(struct connectdata *conn, bool *done);
+static CURLcode smtp_disconnect(struct connectdata *conn);
+static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done);
+static int smtp_getsock(struct connectdata *conn,
+ curl_socket_t *socks,
+ int numsocks);
+static CURLcode smtp_doing(struct connectdata *conn,
+ bool *dophase_done);
+static CURLcode smtp_setup_connection(struct connectdata * conn);
+
+
+/*
+ * SMTP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_smtp = {
+ "SMTP", /* scheme */
+ smtp_setup_connection, /* setup_connection */
+ smtp_do, /* do_it */
+ smtp_done, /* done */
+ ZERO_NULL, /* do_more */
+ smtp_connect, /* connect_it */
+ smtp_multi_statemach, /* connecting */
+ smtp_doing, /* doing */
+ smtp_getsock, /* proto_getsock */
+ smtp_getsock, /* doing_getsock */
+ ZERO_NULL, /* perform_getsock */
+ smtp_disconnect, /* disconnect */
+ PORT_SMTP, /* defport */
+ PROT_SMTP /* protocol */
+};
+
+
+#ifdef USE_SSL
+/*
+ * SMTPS protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_smtps = {
+ "SMTPS", /* scheme */
+ smtp_setup_connection, /* setup_connection */
+ smtp_do, /* do_it */
+ smtp_done, /* done */
+ ZERO_NULL, /* do_more */
+ smtp_connect, /* connect_it */
+ smtp_multi_statemach, /* connecting */
+ smtp_doing, /* doing */
+ smtp_getsock, /* proto_getsock */
+ smtp_getsock, /* doing_getsock */
+ ZERO_NULL, /* perform_getsock */
+ smtp_disconnect, /* disconnect */
+ PORT_SMTPS, /* defport */
+ PROT_SMTP | PROT_SMTPS | PROT_SSL /* protocol */
+};
+#endif
+
+#ifndef CURL_DISABLE_HTTP
+/*
+ * HTTP-proxyed SMTP protocol handler.
+ */
+
+static const struct Curl_handler Curl_handler_smtp_proxy = {
+ "SMTP", /* scheme */
+ ZERO_NULL, /* setup_connection */
+ Curl_http, /* do_it */
+ Curl_http_done, /* done */
+ ZERO_NULL, /* do_more */
+ ZERO_NULL, /* connect_it */
+ ZERO_NULL, /* connecting */
+ ZERO_NULL, /* doing */
+ ZERO_NULL, /* proto_getsock */
+ ZERO_NULL, /* doing_getsock */
+ ZERO_NULL, /* perform_getsock */
+ ZERO_NULL, /* disconnect */
+ PORT_SMTP, /* defport */
+ PROT_HTTP /* protocol */
+};
+
+
+#ifdef USE_SSL
+/*
+ * HTTP-proxyed SMTPS protocol handler.
+ */
+
+static const struct Curl_handler Curl_handler_smtps_proxy = {
+ "SMTPS", /* scheme */
+ ZERO_NULL, /* setup_connection */
+ Curl_http, /* do_it */
+ Curl_http_done, /* done */
+ ZERO_NULL, /* do_more */
+ ZERO_NULL, /* connect_it */
+ ZERO_NULL, /* connecting */
+ ZERO_NULL, /* doing */
+ ZERO_NULL, /* proto_getsock */
+ ZERO_NULL, /* doing_getsock */
+ ZERO_NULL, /* perform_getsock */
+ ZERO_NULL, /* disconnect */
+ PORT_SMTPS, /* defport */
+ PROT_HTTP /* protocol */
+};
+#endif
+#endif
+
+
+/* fucntion that checks for an ending smtp status code at the start of the
+ given string */
+static int smtp_endofresp(struct pingpong *pp, int *resp)
+{
+ char *line = pp->linestart_resp;
+ size_t len = pp->nread_resp;
+
+ if( (len >= 4) && (' ' == line[3]) &&
+ ISDIGIT(line[0]) && ISDIGIT(line[1]) && ISDIGIT(line[2])) {
+ *resp=atoi(line);
+ return TRUE;
+ }
+
+ return FALSE; /* nothing for us */
+}
+
+/* This is the ONLY way to change SMTP state! */
+static void state(struct connectdata *conn,
+ smtpstate newstate)
+{
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+ /* for debug purposes */
+ static const char * const names[]={
+ "STOP",
+ "SERVERGREET",
+ "EHLO",
+ "HELO",
+ "STARTTLS",
+ "MAIL",
+ "RCPT",
+ "DATA",
+ "POSTDATA",
+ "QUIT",
+ /* LAST */
+ };
+#endif
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+ if(smtpc->state != newstate)
+ infof(conn->data, "SMTP %p state change from %s to %s\n",
+ smtpc, names[smtpc->state], names[newstate]);
+#endif
+ smtpc->state = newstate;
+}
+
+static CURLcode smtp_state_ehlo(struct connectdata *conn)
+{
+ CURLcode result;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ /* send EHLO */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "EHLO %s", smtpc->domain);
+
+ if(result)
+ return result;
+
+ state(conn, SMTP_EHLO);
+ return CURLE_OK;
+}
+
+static CURLcode smtp_state_helo(struct connectdata *conn)
+{
+ CURLcode result;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ /* send HELO */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "HELO %s", smtpc->domain);
+
+ if(result)
+ return result;
+
+ state(conn, SMTP_HELO);
+ return CURLE_OK;
+}
+
+/* For the SMTP "protocol connect" and "doing" phases only */
+static int smtp_getsock(struct connectdata *conn,
+ curl_socket_t *socks,
+ int numsocks)
+{
+ return Curl_pp_getsock(&conn->proto.smtpc.pp, socks, numsocks);
+}
+
+/* for STARTTLS responses */
+static CURLcode smtp_state_starttls_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode != 220) {
+ if(data->set.ftp_ssl == CURLUSESSL_TRY)
+ state(conn, SMTP_STOP);
+ else {
+ failf(data, "STARTTLS denied. %c", smtpcode);
+ result = CURLE_LOGIN_DENIED;
+ }
+ }
+ else {
+ /* Curl_ssl_connect is BLOCKING */
+ result = Curl_ssl_connect(conn, FIRSTSOCKET);
+ if(CURLE_OK == result) {
+ conn->protocol |= PROT_SMTPS;
+ result = smtp_state_ehlo(conn);
+ }
+ }
+ return result;
+}
+
+/* for EHLO responses */
+static CURLcode smtp_state_ehlo_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode/100 != 2) {
+ if(data->set.ftp_ssl <= CURLUSESSL_TRY)
+ result = smtp_state_helo(conn);
+ else {
+ failf(data, "Access denied: %d", smtpcode);
+ result = CURLE_LOGIN_DENIED;
+ }
+ }
+ else if(data->set.ftp_ssl && !conn->ssl[FIRSTSOCKET].use) {
+ /* We don't have a SSL/TLS connection yet, but SSL is requested. Switch
+ to TLS connection now */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "STARTTLS", NULL);
+ state(conn, SMTP_STARTTLS);
+ }
+ else {
+ /* end the connect phase */
+ state(conn, SMTP_STOP);
+ }
+ return result;
+}
+
+/* for HELO responses */
+static CURLcode smtp_state_helo_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode/100 != 2) {
+ failf(data, "Access denied: %d", smtpcode);
+ result = CURLE_LOGIN_DENIED;
+ }
+ else {
+ /* end the connect phase */
+ state(conn, SMTP_STOP);
+ }
+ return result;
+}
+
+/* start the DO phase */
+static CURLcode smtp_mail(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ /* send MAIL */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "MAIL FROM:%s",
+ data->set.str[STRING_MAIL_FROM]);
+ if(result)
+ return result;
+
+ state(conn, SMTP_MAIL);
+ return result;
+}
+
+static CURLcode smtp_rcpt_to(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ /* send RCPT TO */
+ if(smtpc->rcpt) {
+ if(smtpc->rcpt->data[0] == '<')
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:%s",
+ smtpc->rcpt->data);
+ else
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:<%s>",
+ smtpc->rcpt->data);
+ if(!result)
+ state(conn, SMTP_RCPT);
+ }
+ return result;
+}
+
+/* for MAIL responses */
+static CURLcode smtp_state_mail_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode/100 != 2) {
+ failf(data, "Access denied: %d", smtpcode);
+ result = CURLE_LOGIN_DENIED;
+ state(conn, SMTP_STOP);
+ }
+ else {
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ smtpc->rcpt = data->set.mail_rcpt;
+
+ result = smtp_rcpt_to(conn);
+ }
+
+ return result;
+}
+
+/* for RCPT responses */
+static CURLcode smtp_state_rcpt_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode/100 != 2) {
+ failf(data, "Access denied: %d", smtpcode);
+ result = CURLE_LOGIN_DENIED;
+ state(conn, SMTP_STOP);
+ }
+ else {
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ if(smtpc->rcpt) {
+ smtpc->rcpt = smtpc->rcpt->next;
+ result = smtp_rcpt_to(conn);
+
+ /* if we failed or still is in RCPT sending, return */
+ if(result || smtpc->rcpt)
+ return result;
+ }
+
+ /* send DATA */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "DATA", "");
+ if(result)
+ return result;
+
+ state(conn, SMTP_DATA);
+ }
+ return result;
+}
+
+/* for the DATA response */
+static CURLcode smtp_state_data_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct FTP *smtp = data->state.proto.smtp;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode != 354) {
+ state(conn, SMTP_STOP);
+ return CURLE_RECV_ERROR;
+ }
+
+ /* SMTP upload */
+ result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, /* no download */
+ FIRSTSOCKET, smtp->bytecountp);
+
+ state(conn, SMTP_STOP);
+ return result;
+}
+
+/* for the POSTDATA response, which is received after the entire DATA
+ part has been sent off to the server */
+static CURLcode smtp_state_postdata_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode != 250)
+ result = CURLE_RECV_ERROR;
+
+ state(conn, SMTP_STOP);
+ return result;
+}
+
+static CURLcode smtp_statemach_act(struct connectdata *conn)
+{
+ CURLcode result;
+ curl_socket_t sock = conn->sock[FIRSTSOCKET];
+ struct SessionHandle *data=conn->data;
+ int smtpcode;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ struct pingpong *pp = &smtpc->pp;
+ size_t nread = 0;
+
+ if(pp->sendleft)
+ /* we have a piece of a command still left to send */
+ return Curl_pp_flushsend(pp);
+
+ /* we read a piece of response */
+ result = Curl_pp_readresp(sock, pp, &smtpcode, &nread);
+ if(result)
+ return result;
+
+ if(smtpcode) {
+ /* we have now received a full SMTP server response */
+ switch(smtpc->state) {
+ case SMTP_SERVERGREET:
+ if(smtpcode/100 != 2) {
+ failf(data, "Got unexpected smtp-server response: %d", smtpcode);
+ return CURLE_FTP_WEIRD_SERVER_REPLY;
+ }
+
+ 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.
+ */
+ ssize_t i;
+ ssize_t 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>= (ssize_t)(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 */