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diff --git a/lib/pop3.c b/lib/pop3.c
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+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2009, 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.
+ *
+ * RFC1939 POP3 protocol
+ * RFC2384 POP URL Scheme
+ * RFC2595 Using TLS with IMAP, POP3 and ACAP
+ *
+ * $Id$
+ ***************************************************************************/
+
+#include "setup.h"
+
+#ifndef CURL_DISABLE_POP3
+#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 "pop3.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 pop3_parse_url_path(struct connectdata *conn);
+static CURLcode pop3_regular_transfer(struct connectdata *conn, bool *done);
+static CURLcode pop3_do(struct connectdata *conn, bool *done);
+static CURLcode pop3_done(struct connectdata *conn,
+ CURLcode, bool premature);
+static CURLcode pop3_connect(struct connectdata *conn, bool *done);
+static CURLcode pop3_disconnect(struct connectdata *conn);
+static CURLcode pop3_multi_statemach(struct connectdata *conn, bool *done);
+static int pop3_getsock(struct connectdata *conn,
+ curl_socket_t *socks,
+ int numsocks);
+static CURLcode pop3_doing(struct connectdata *conn,
+ bool *dophase_done);
+static CURLcode pop3_setup_connection(struct connectdata * conn);
+
+/*
+ * POP3 protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_pop3 = {
+ "POP3", /* scheme */
+ pop3_setup_connection, /* setup_connection */
+ pop3_do, /* do_it */
+ pop3_done, /* done */
+ ZERO_NULL, /* do_more */
+ pop3_connect, /* connect_it */
+ pop3_multi_statemach, /* connecting */
+ pop3_doing, /* doing */
+ pop3_getsock, /* proto_getsock */
+ pop3_getsock, /* doing_getsock */
+ ZERO_NULL, /* perform_getsock */
+ pop3_disconnect, /* disconnect */
+ PORT_POP3, /* defport */
+ PROT_POP3 /* protocol */
+};
+
+
+#ifdef USE_SSL
+/*
+ * POP3S protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_pop3s = {
+ "POP3S", /* scheme */
+ pop3_setup_connection, /* setup_connection */
+ pop3_do, /* do_it */
+ pop3_done, /* done */
+ ZERO_NULL, /* do_more */
+ pop3_connect, /* connect_it */
+ pop3_multi_statemach, /* connecting */
+ pop3_doing, /* doing */
+ pop3_getsock, /* proto_getsock */
+ pop3_getsock, /* doing_getsock */
+ ZERO_NULL, /* perform_getsock */
+ pop3_disconnect, /* disconnect */
+ PORT_POP3S, /* defport */
+ PROT_POP3 | PROT_POP3S | PROT_SSL /* protocol */
+};
+#endif
+
+#ifndef CURL_DISABLE_HTTP
+/*
+ * HTTP-proxyed POP3 protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_pop3_proxy = {
+ "POP3", /* 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_POP3, /* defport */
+ PROT_HTTP /* protocol */
+};
+
+
+#ifdef USE_SSL
+/*
+ * HTTP-proxyed POP3S protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_pop3s_proxy = {
+ "POP3S", /* 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_POP3S, /* defport */
+ PROT_HTTP /* protocol */
+};
+#endif
+#endif
+
+
+/* function that checks for a pop3 status code at the start of the given
+ string */
+static int pop3_endofresp(struct pingpong *pp,
+ int *resp)
+{
+ char *line = pp->linestart_resp;
+ size_t len = pp->nread_resp;
+
+ if( ((len >= 3) && !memcmp("+OK", line, 3)) ||
+ ((len >= 4) && !memcmp("-ERR", line, 4)) ) {
+ *resp=line[1]; /* O or E */
+ return TRUE;
+ }
+
+ return FALSE; /* nothing for us */
+}
+
+/* This is the ONLY way to change POP3 state! */
+static void state(struct connectdata *conn,
+ pop3state newstate)
+{
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+ /* for debug purposes */
+ static const char * const names[]={
+ "STOP",
+ "SERVERGREET",
+ "USER",
+ "PASS",
+ "STARTTLS",
+ "RETR",
+ "QUIT",
+ /* LAST */
+ };
+#endif
+ struct pop3_conn *pop3c = &conn->proto.pop3c;
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+ if(pop3c->state != newstate)
+ infof(conn->data, "POP3 %p state change from %s to %s\n",
+ pop3c, names[pop3c->state], names[newstate]);
+#endif
+ pop3c->state = newstate;
+}
+
+static CURLcode pop3_state_user(struct connectdata *conn)
+{
+ CURLcode result;
+ struct FTP *pop3 = conn->data->state.proto.pop3;
+
+ /* send USER */
+ result = Curl_pp_sendf(&conn->proto.pop3c.pp, "USER %s",
+ pop3->user?pop3->user:"");
+ if(result)
+ return result;
+
+ state(conn, POP3_USER);
+
+ return CURLE_OK;
+}
+
+/* For the POP3 "protocol connect" and "doing" phases only */
+static int pop3_getsock(struct connectdata *conn,
+ curl_socket_t *socks,
+ int numsocks)
+{
+ return Curl_pp_getsock(&conn->proto.pop3c.pp, socks, numsocks);
+}
+
+/* for STARTTLS responses */
+static CURLcode pop3_state_starttls_resp(struct connectdata *conn,
+ int pop3code,
+ pop3state instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ (void)instate; /* no use for this yet */
+
+ if(pop3code != 'O') {
+ failf(data, "STARTTLS denied. %c", pop3code);
+ result = CURLE_LOGIN_DENIED;
+ }
+ else {
+ /* Curl_ssl_connect is BLOCKING */
+ result = Curl_ssl_connect(conn, FIRSTSOCKET);
+ if(CURLE_OK == result) {
+ conn->protocol |= PROT_POP3S;
+ result = pop3_state_user(conn);
+ }
+ }
+ state(conn, POP3_STOP);
+ return result;
+}
+
+/* for USER responses */
+static CURLcode pop3_state_user_resp(struct connectdata *conn,
+ int pop3code,
+ pop3state instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct FTP *pop3 = data->state.proto.pop3;
+
+ (void)instate; /* no use for this yet */
+
+ if(pop3code != 'O') {
+ failf(data, "Access denied. %c", pop3code);
+ result = CURLE_LOGIN_DENIED;
+ }
+
+ /* send PASS */
+ result = Curl_pp_sendf(&conn->proto.pop3c.pp, "PASS %s",
+ pop3->passwd?pop3->passwd:"");
+ if(result)
+ return result;
+
+ state(conn, POP3_PASS);
+ return result;
+}
+
+/* for PASS responses */
+static CURLcode pop3_state_pass_resp(struct connectdata *conn,
+ int pop3code,
+ pop3state instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ (void)instate; /* no use for this yet */
+
+ if(pop3code != 'O') {
+ failf(data, "Access denied. %c", pop3code);
+ result = CURLE_LOGIN_DENIED;
+ }
+
+ state(conn, POP3_STOP);
+ return result;
+}
+
+/* for the retr response */
+static CURLcode pop3_state_retr_resp(struct connectdata *conn,
+ int pop3code,
+ pop3state instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct FTP *pop3 = data->state.proto.pop3;
+ struct pop3_conn *pop3c = &conn->proto.pop3c;
+ struct pingpong *pp = &pop3c->pp;
+
+ (void)instate; /* no use for this yet */
+
+ if('O' != pop3code) {
+ state(conn, POP3_STOP);
+ return CURLE_RECV_ERROR;
+ }
+
+ /* POP3 download */
+ result=Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE,
+ pop3->bytecountp,
+ -1, NULL); /* no upload here */
+
+ if(pp->cache) {
+ /* At this point there is a bunch of data in the header "cache" that is
+ actually body content, send it as body and then skip it. Do note
+ that there may even be additional "headers" after the body. */
+
+ /* we may get the EOB already here! */
+ result = Curl_pop3_write(conn, pp->cache, pp->cache_size);
+ if(result)
+ return result;
+
+ /* cache is drained */
+ free(pp->cache);
+ pp->cache = NULL;
+ pp->cache_size = 0;
+ }
+
+ state(conn, POP3_STOP);
+ return result;
+}
+
+/* start the DO phase */
+static CURLcode pop3_retr(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct pop3_conn *pop3c = &conn->proto.pop3c;
+
+ result = Curl_pp_sendf(&conn->proto.pop3c.pp, "RETR %s", pop3c->mailbox);
+ if(result)
+ return result;
+
+ state(conn, POP3_RETR);
+ return result;
+}
+
+static CURLcode pop3_statemach_act(struct connectdata *conn)
+{
+ CURLcode result;
+ curl_socket_t sock = conn->sock[FIRSTSOCKET];
+ struct SessionHandle *data=conn->data;
+ int pop3code;
+ struct pop3_conn *pop3c = &conn->proto.pop3c;
+ struct pingpong *pp = &pop3c->pp;
+ size_t nread = 0;
+
+ if(pp->sendleft)
+ return Curl_pp_flushsend(pp);
+
+ /* we read a piece of response */
+ result = Curl_pp_readresp(sock, pp, &pop3code, &nread);
+ if(result)
+ return result;
+
+ if(pop3code) {
+ /* we have now received a full POP3 server response */
+ switch(pop3c->state) {
+ case POP3_SERVERGREET:
+ if(pop3code != 'O') {
+ failf(data, "Got unexpected pop3-server response");
+ return CURLE_FTP_WEIRD_SERVER_REPLY;
+ }
+
+ 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 */
+ const char *str;
+
+ result = Curl_pp_sendf(&pop3c->pp, "STARTTLS", str);
+ state(conn, POP3_STARTTLS);
+ }
+ else
+ result = pop3_state_user(conn);
+ if(result)
+ return result;
+ break;
+
+ case POP3_USER:
+ result = pop3_state_user_resp(conn, pop3code, pop3c->state);
+ break;
+
+ case POP3_PASS:
+ result = pop3_state_pass_resp(conn, pop3code, pop3c->state);
+ break;
+
+ case POP3_STARTTLS:
+ result = pop3_state_starttls_resp(conn, pop3code, pop3c->state);
+ break;
+
+ case POP3_RETR:
+ result = pop3_state_retr_resp(conn, pop3code, pop3c->state);
+ break;
+
+ case POP3_QUIT:
+ /* fallthrough, just stop! */
+ default:
+ /* internal error */
+ state(conn, POP3_STOP);
+ break;
+ }
+ }
+ return result;
+}
+
+/* called repeatedly until done from multi.c */
+static CURLcode pop3_multi_statemach(struct connectdata *conn, bool *done)
+{
+ 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;
+
+ 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 */
+ result = pop3_retr(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;
+
+ if(!*path)
+ path = "INBOX";
+
+ /* 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;
+ int checkmax = (nread >= POP3_EOB_LEN?POP3_EOB_LEN:nread);
+ int checkleft = POP3_EOB_LEN-pop3c->eob;
+ int 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! */
+ 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 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 23:54:53 +0000