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-rw-r--r--Utilities/cmcurl/telnet.c1403
1 files changed, 1403 insertions, 0 deletions
diff --git a/Utilities/cmcurl/telnet.c b/Utilities/cmcurl/telnet.c
new file mode 100644
index 000000000..97d22b788
--- /dev/null
+++ b/Utilities/cmcurl/telnet.c
@@ -0,0 +1,1403 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2007, 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.
+ *
+ * $Id$
+ ***************************************************************************/
+
+#include "setup.h"
+
+#ifndef CURL_DISABLE_TELNET
+/* -- WIN32 approved -- */
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <ctype.h>
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+
+#if defined(WIN32)
+#include <time.h>
+#include <io.h>
+#else
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#include <netinet/in.h>
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <netdb.h>
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+#include <sys/ioctl.h>
+#include <signal.h>
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+
+#endif
+
+#include "urldata.h"
+#include <curl/curl.h>
+#include "transfer.h"
+#include "sendf.h"
+#include "telnet.h"
+#include "connect.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+#define TELOPTS
+#define TELCMDS
+
+#include "arpa_telnet.h"
+#include "memory.h"
+#include "select.h"
+
+/* The last #include file should be: */
+#include "memdebug.h"
+
+#define SUBBUFSIZE 512
+
+#define CURL_SB_CLEAR(x) x->subpointer = x->subbuffer;
+#define CURL_SB_TERM(x) { x->subend = x->subpointer; CURL_SB_CLEAR(x); }
+#define CURL_SB_ACCUM(x,c) \
+ if (x->subpointer < (x->subbuffer+sizeof x->subbuffer)) { \
+ *x->subpointer++ = (c); \
+ }
+
+#define CURL_SB_GET(x) ((*x->subpointer++)&0xff)
+#define CURL_SB_PEEK(x) ((*x->subpointer)&0xff)
+#define CURL_SB_EOF(x) (x->subpointer >= x->subend)
+#define CURL_SB_LEN(x) (x->subend - x->subpointer)
+
+#ifdef USE_WINSOCK
+typedef FARPROC WSOCK2_FUNC;
+static CURLcode check_wsock2 ( struct SessionHandle *data );
+#endif
+
+static
+void telrcv(struct connectdata *,
+ unsigned char *inbuf, /* Data received from socket */
+ ssize_t count); /* Number of bytes received */
+
+static void printoption(struct SessionHandle *data,
+ const char *direction,
+ int cmd, int option);
+
+static void negotiate(struct connectdata *);
+static void send_negotiation(struct connectdata *, int cmd, int option);
+static void set_local_option(struct connectdata *, int cmd, int option);
+static void set_remote_option(struct connectdata *, int cmd, int option);
+
+static void printsub(struct SessionHandle *data,
+ int direction, unsigned char *pointer,
+ size_t length);
+static void suboption(struct connectdata *);
+
+/* For negotiation compliant to RFC 1143 */
+#define CURL_NO 0
+#define CURL_YES 1
+#define CURL_WANTYES 2
+#define CURL_WANTNO 3
+
+#define CURL_EMPTY 0
+#define CURL_OPPOSITE 1
+
+/*
+ * Telnet receiver states for fsm
+ */
+typedef enum
+{
+ CURL_TS_DATA = 0,
+ CURL_TS_IAC,
+ CURL_TS_WILL,
+ CURL_TS_WONT,
+ CURL_TS_DO,
+ CURL_TS_DONT,
+ CURL_TS_CR,
+ CURL_TS_SB, /* sub-option collection */
+ CURL_TS_SE /* looking for sub-option end */
+} TelnetReceive;
+
+struct TELNET {
+ int please_negotiate;
+ int already_negotiated;
+ int us[256];
+ int usq[256];
+ int us_preferred[256];
+ int him[256];
+ int himq[256];
+ int him_preferred[256];
+ char subopt_ttype[32]; /* Set with suboption TTYPE */
+ char subopt_xdisploc[128]; /* Set with suboption XDISPLOC */
+ struct curl_slist *telnet_vars; /* Environment variables */
+
+ /* suboptions */
+ unsigned char subbuffer[SUBBUFSIZE];
+ unsigned char *subpointer, *subend; /* buffer for sub-options */
+
+ TelnetReceive telrcv_state;
+};
+
+#ifdef USE_WINSOCK
+static CURLcode
+check_wsock2 ( struct SessionHandle *data )
+{
+ int err;
+ WORD wVersionRequested;
+ WSADATA wsaData;
+
+ curlassert(data);
+
+ /* telnet requires at least WinSock 2.0 so ask for it. */
+ wVersionRequested = MAKEWORD(2, 0);
+
+ err = WSAStartup(wVersionRequested, &wsaData);
+
+ /* We must've called this once already, so this call */
+ /* should always succeed. But, just in case... */
+ if (err != 0) {
+ failf(data,"WSAStartup failed (%d)",err);
+ return CURLE_FAILED_INIT;
+ }
+
+ /* We have to have a WSACleanup call for every successful */
+ /* WSAStartup call. */
+ WSACleanup();
+
+ /* Check that our version is supported */
+ if (LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) ||
+ HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested)) {
+ /* Our version isn't supported */
+ failf(data,"insufficient winsock version to support "
+ "telnet");
+ return CURLE_FAILED_INIT;
+ }
+
+ /* Our version is supported */
+ return CURLE_OK;
+}
+#endif
+
+static
+CURLcode init_telnet(struct connectdata *conn)
+{
+ struct TELNET *tn;
+
+ tn = (struct TELNET *)calloc(1, sizeof(struct TELNET));
+ if(!tn)
+ return CURLE_OUT_OF_MEMORY;
+
+ conn->data->reqdata.proto.telnet = (void *)tn; /* make us known */
+
+ tn->telrcv_state = CURL_TS_DATA;
+
+ /* Init suboptions */
+ CURL_SB_CLEAR(tn);
+
+ /* Set the options we want by default */
+ tn->us_preferred[CURL_TELOPT_BINARY] = CURL_YES;
+ tn->us_preferred[CURL_TELOPT_SGA] = CURL_YES;
+ tn->him_preferred[CURL_TELOPT_BINARY] = CURL_YES;
+ tn->him_preferred[CURL_TELOPT_SGA] = CURL_YES;
+
+ return CURLE_OK;
+}
+
+static void negotiate(struct connectdata *conn)
+{
+ int i;
+ struct TELNET *tn = (struct TELNET *) conn->data->reqdata.proto.telnet;
+
+ for(i = 0;i < CURL_NTELOPTS;i++)
+ {
+ if(tn->us_preferred[i] == CURL_YES)
+ set_local_option(conn, i, CURL_YES);
+
+ if(tn->him_preferred[i] == CURL_YES)
+ set_remote_option(conn, i, CURL_YES);
+ }
+}
+
+static void printoption(struct SessionHandle *data,
+ const char *direction, int cmd, int option)
+{
+ const char *fmt;
+ const char *opt;
+
+ if (data->set.verbose)
+ {
+ if (cmd == CURL_IAC)
+ {
+ if (CURL_TELCMD_OK(option))
+ infof(data, "%s IAC %s\n", direction, CURL_TELCMD(option));
+ else
+ infof(data, "%s IAC %d\n", direction, option);
+ }
+ else
+ {
+ fmt = (cmd == CURL_WILL) ? "WILL" : (cmd == CURL_WONT) ? "WONT" :
+ (cmd == CURL_DO) ? "DO" : (cmd == CURL_DONT) ? "DONT" : 0;
+ if (fmt)
+ {
+ if (CURL_TELOPT_OK(option))
+ opt = CURL_TELOPT(option);
+ else if (option == CURL_TELOPT_EXOPL)
+ opt = "EXOPL";
+ else
+ opt = NULL;
+
+ if(opt)
+ infof(data, "%s %s %s\n", direction, fmt, opt);
+ else
+ infof(data, "%s %s %d\n", direction, fmt, option);
+ }
+ else
+ infof(data, "%s %d %d\n", direction, cmd, option);
+ }
+ }
+}
+
+static void send_negotiation(struct connectdata *conn, int cmd, int option)
+{
+ unsigned char buf[3];
+ ssize_t bytes_written;
+ int err;
+ struct SessionHandle *data = conn->data;
+
+ buf[0] = CURL_IAC;
+ buf[1] = (unsigned char)cmd;
+ buf[2] = (unsigned char)option;
+
+ bytes_written = swrite(conn->sock[FIRSTSOCKET], buf, 3);
+ if(bytes_written < 0) {
+ err = Curl_sockerrno();
+ failf(data,"Sending data failed (%d)",err);
+ }
+
+ printoption(conn->data, "SENT", cmd, option);
+}
+
+static
+void set_remote_option(struct connectdata *conn, int option, int newstate)
+{
+ struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
+ if(newstate == CURL_YES)
+ {
+ switch(tn->him[option])
+ {
+ case CURL_NO:
+ tn->him[option] = CURL_WANTYES;
+ send_negotiation(conn, CURL_DO, option);
+ break;
+
+ case CURL_YES:
+ /* Already enabled */
+ break;
+
+ case CURL_WANTNO:
+ switch(tn->himq[option])
+ {
+ case CURL_EMPTY:
+ /* Already negotiating for CURL_YES, queue the request */
+ tn->himq[option] = CURL_OPPOSITE;
+ break;
+ case CURL_OPPOSITE:
+ /* Error: already queued an enable request */
+ break;
+ }
+ break;
+
+ case CURL_WANTYES:
+ switch(tn->himq[option])
+ {
+ case CURL_EMPTY:
+ /* Error: already negotiating for enable */
+ break;
+ case CURL_OPPOSITE:
+ tn->himq[option] = CURL_EMPTY;
+ break;
+ }
+ break;
+ }
+ }
+ else /* NO */
+ {
+ switch(tn->him[option])
+ {
+ case CURL_NO:
+ /* Already disabled */
+ break;
+
+ case CURL_YES:
+ tn->him[option] = CURL_WANTNO;
+ send_negotiation(conn, CURL_DONT, option);
+ break;
+
+ case CURL_WANTNO:
+ switch(tn->himq[option])
+ {
+ case CURL_EMPTY:
+ /* Already negotiating for NO */
+ break;
+ case CURL_OPPOSITE:
+ tn->himq[option] = CURL_EMPTY;
+ break;
+ }
+ break;
+
+ case CURL_WANTYES:
+ switch(tn->himq[option])
+ {
+ case CURL_EMPTY:
+ tn->himq[option] = CURL_OPPOSITE;
+ break;
+ case CURL_OPPOSITE:
+ break;
+ }
+ break;
+ }
+ }
+}
+
+static
+void rec_will(struct connectdata *conn, int option)
+{
+ struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
+ switch(tn->him[option])
+ {
+ case CURL_NO:
+ if(tn->him_preferred[option] == CURL_YES)
+ {
+ tn->him[option] = CURL_YES;
+ send_negotiation(conn, CURL_DO, option);
+ }
+ else
+ {
+ send_negotiation(conn, CURL_DONT, option);
+ }
+ break;
+
+ case CURL_YES:
+ /* Already enabled */
+ break;
+
+ case CURL_WANTNO:
+ switch(tn->himq[option])
+ {
+ case CURL_EMPTY:
+ /* Error: DONT answered by WILL */
+ tn->him[option] = CURL_NO;
+ break;
+ case CURL_OPPOSITE:
+ /* Error: DONT answered by WILL */
+ tn->him[option] = CURL_YES;
+ tn->himq[option] = CURL_EMPTY;
+ break;
+ }
+ break;
+
+ case CURL_WANTYES:
+ switch(tn->himq[option])
+ {
+ case CURL_EMPTY:
+ tn->him[option] = CURL_YES;
+ break;
+ case CURL_OPPOSITE:
+ tn->him[option] = CURL_WANTNO;
+ tn->himq[option] = CURL_EMPTY;
+ send_negotiation(conn, CURL_DONT, option);
+ break;
+ }
+ break;
+ }
+}
+
+static
+void rec_wont(struct connectdata *conn, int option)
+{
+ struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
+ switch(tn->him[option])
+ {
+ case CURL_NO:
+ /* Already disabled */
+ break;
+
+ case CURL_YES:
+ tn->him[option] = CURL_NO;
+ send_negotiation(conn, CURL_DONT, option);
+ break;
+
+ case CURL_WANTNO:
+ switch(tn->himq[option])
+ {
+ case CURL_EMPTY:
+ tn->him[option] = CURL_NO;
+ break;
+
+ case CURL_OPPOSITE:
+ tn->him[option] = CURL_WANTYES;
+ tn->himq[option] = CURL_EMPTY;
+ send_negotiation(conn, CURL_DO, option);
+ break;
+ }
+ break;
+
+ case CURL_WANTYES:
+ switch(tn->himq[option])
+ {
+ case CURL_EMPTY:
+ tn->him[option] = CURL_NO;
+ break;
+ case CURL_OPPOSITE:
+ tn->him[option] = CURL_NO;
+ tn->himq[option] = CURL_EMPTY;
+ break;
+ }
+ break;
+ }
+}
+
+static void
+set_local_option(struct connectdata *conn, int option, int newstate)
+{
+ struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
+ if(newstate == CURL_YES)
+ {
+ switch(tn->us[option])
+ {
+ case CURL_NO:
+ tn->us[option] = CURL_WANTYES;
+ send_negotiation(conn, CURL_WILL, option);
+ break;
+
+ case CURL_YES:
+ /* Already enabled */
+ break;
+
+ case CURL_WANTNO:
+ switch(tn->usq[option])
+ {
+ case CURL_EMPTY:
+ /* Already negotiating for CURL_YES, queue the request */
+ tn->usq[option] = CURL_OPPOSITE;
+ break;
+ case CURL_OPPOSITE:
+ /* Error: already queued an enable request */
+ break;
+ }
+ break;
+
+ case CURL_WANTYES:
+ switch(tn->usq[option])
+ {
+ case CURL_EMPTY:
+ /* Error: already negotiating for enable */
+ break;
+ case CURL_OPPOSITE:
+ tn->usq[option] = CURL_EMPTY;
+ break;
+ }
+ break;
+ }
+ }
+ else /* NO */
+ {
+ switch(tn->us[option])
+ {
+ case CURL_NO:
+ /* Already disabled */
+ break;
+
+ case CURL_YES:
+ tn->us[option] = CURL_WANTNO;
+ send_negotiation(conn, CURL_WONT, option);
+ break;
+
+ case CURL_WANTNO:
+ switch(tn->usq[option])
+ {
+ case CURL_EMPTY:
+ /* Already negotiating for NO */
+ break;
+ case CURL_OPPOSITE:
+ tn->usq[option] = CURL_EMPTY;
+ break;
+ }
+ break;
+
+ case CURL_WANTYES:
+ switch(tn->usq[option])
+ {
+ case CURL_EMPTY:
+ tn->usq[option] = CURL_OPPOSITE;
+ break;
+ case CURL_OPPOSITE:
+ break;
+ }
+ break;
+ }
+ }
+}
+
+static
+void rec_do(struct connectdata *conn, int option)
+{
+ struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
+ switch(tn->us[option])
+ {
+ case CURL_NO:
+ if(tn->us_preferred[option] == CURL_YES)
+ {
+ tn->us[option] = CURL_YES;
+ send_negotiation(conn, CURL_WILL, option);
+ }
+ else
+ {
+ send_negotiation(conn, CURL_WONT, option);
+ }
+ break;
+
+ case CURL_YES:
+ /* Already enabled */
+ break;
+
+ case CURL_WANTNO:
+ switch(tn->usq[option])
+ {
+ case CURL_EMPTY:
+ /* Error: DONT answered by WILL */
+ tn->us[option] = CURL_NO;
+ break;
+ case CURL_OPPOSITE:
+ /* Error: DONT answered by WILL */
+ tn->us[option] = CURL_YES;
+ tn->usq[option] = CURL_EMPTY;
+ break;
+ }
+ break;
+
+ case CURL_WANTYES:
+ switch(tn->usq[option])
+ {
+ case CURL_EMPTY:
+ tn->us[option] = CURL_YES;
+ break;
+ case CURL_OPPOSITE:
+ tn->us[option] = CURL_WANTNO;
+ tn->himq[option] = CURL_EMPTY;
+ send_negotiation(conn, CURL_WONT, option);
+ break;
+ }
+ break;
+ }
+}
+
+static
+void rec_dont(struct connectdata *conn, int option)
+{
+ struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
+ switch(tn->us[option])
+ {
+ case CURL_NO:
+ /* Already disabled */
+ break;
+
+ case CURL_YES:
+ tn->us[option] = CURL_NO;
+ send_negotiation(conn, CURL_WONT, option);
+ break;
+
+ case CURL_WANTNO:
+ switch(tn->usq[option])
+ {
+ case CURL_EMPTY:
+ tn->us[option] = CURL_NO;
+ break;
+
+ case CURL_OPPOSITE:
+ tn->us[option] = CURL_WANTYES;
+ tn->usq[option] = CURL_EMPTY;
+ send_negotiation(conn, CURL_WILL, option);
+ break;
+ }
+ break;
+
+ case CURL_WANTYES:
+ switch(tn->usq[option])
+ {
+ case CURL_EMPTY:
+ tn->us[option] = CURL_NO;
+ break;
+ case CURL_OPPOSITE:
+ tn->us[option] = CURL_NO;
+ tn->usq[option] = CURL_EMPTY;
+ break;
+ }
+ break;
+ }
+}
+
+
+static void printsub(struct SessionHandle *data,
+ int direction, /* '<' or '>' */
+ unsigned char *pointer, /* where suboption data is */
+ size_t length) /* length of suboption data */
+{
+ unsigned int i = 0;
+
+ if (data->set.verbose)
+ {
+ if (direction)
+ {
+ infof(data, "%s IAC SB ", (direction == '<')? "RCVD":"SENT");
+ if (length >= 3)
+ {
+ int j;
+
+ i = pointer[length-2];
+ j = pointer[length-1];
+
+ if (i != CURL_IAC || j != CURL_SE)
+ {
+ infof(data, "(terminated by ");
+ if (CURL_TELOPT_OK(i))
+ infof(data, "%s ", CURL_TELOPT(i));
+ else if (CURL_TELCMD_OK(i))
+ infof(data, "%s ", CURL_TELCMD(i));
+ else
+ infof(data, "%d ", i);
+ if (CURL_TELOPT_OK(j))
+ infof(data, "%s", CURL_TELOPT(j));
+ else if (CURL_TELCMD_OK(j))
+ infof(data, "%s", CURL_TELCMD(j));
+ else
+ infof(data, "%d", j);
+ infof(data, ", not IAC SE!) ");
+ }
+ }
+ length -= 2;
+ }
+ if (length < 1)
+ {
+ infof(data, "(Empty suboption?)");
+ return;
+ }
+
+ if (CURL_TELOPT_OK(pointer[0])) {
+ switch(pointer[0]) {
+ case CURL_TELOPT_TTYPE:
+ case CURL_TELOPT_XDISPLOC:
+ case CURL_TELOPT_NEW_ENVIRON:
+ infof(data, "%s", CURL_TELOPT(pointer[0]));
+ break;
+ default:
+ infof(data, "%s (unsupported)", CURL_TELOPT(pointer[0]));
+ break;
+ }
+ }
+ else
+ infof(data, "%d (unknown)", pointer[i]);
+
+ switch(pointer[1]) {
+ case CURL_TELQUAL_IS:
+ infof(data, " IS");
+ break;
+ case CURL_TELQUAL_SEND:
+ infof(data, " SEND");
+ break;
+ case CURL_TELQUAL_INFO:
+ infof(data, " INFO/REPLY");
+ break;
+ case CURL_TELQUAL_NAME:
+ infof(data, " NAME");
+ break;
+ }
+
+ switch(pointer[0]) {
+ case CURL_TELOPT_TTYPE:
+ case CURL_TELOPT_XDISPLOC:
+ pointer[length] = 0;
+ infof(data, " \"%s\"", &pointer[2]);
+ break;
+ case CURL_TELOPT_NEW_ENVIRON:
+ if(pointer[1] == CURL_TELQUAL_IS) {
+ infof(data, " ");
+ for(i = 3;i < length;i++) {
+ switch(pointer[i]) {
+ case CURL_NEW_ENV_VAR:
+ infof(data, ", ");
+ break;
+ case CURL_NEW_ENV_VALUE:
+ infof(data, " = ");
+ break;
+ default:
+ infof(data, "%c", pointer[i]);
+ break;
+ }
+ }
+ }
+ break;
+ default:
+ for (i = 2; i < length; i++)
+ infof(data, " %.2x", pointer[i]);
+ break;
+ }
+
+ if (direction)
+ {
+ infof(data, "\n");
+ }
+ }
+}
+
+static CURLcode check_telnet_options(struct connectdata *conn)
+{
+ struct curl_slist *head;
+ char option_keyword[128];
+ char option_arg[256];
+ char *buf;
+ struct SessionHandle *data = conn->data;
+ struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
+
+ /* Add the user name as an environment variable if it
+ was given on the command line */
+ if(conn->bits.user_passwd)
+ {
+ snprintf(option_arg, sizeof(option_arg), "USER,%s", conn->user);
+ tn->telnet_vars = curl_slist_append(tn->telnet_vars, option_arg);
+
+ tn->us_preferred[CURL_TELOPT_NEW_ENVIRON] = CURL_YES;
+ }
+
+ for(head = data->set.telnet_options; head; head=head->next) {
+ if(sscanf(head->data, "%127[^= ]%*[ =]%255s",
+ option_keyword, option_arg) == 2) {
+
+ /* Terminal type */
+ if(curl_strequal(option_keyword, "TTYPE")) {
+ strncpy(tn->subopt_ttype, option_arg, 31);
+ tn->subopt_ttype[31] = 0; /* String termination */
+ tn->us_preferred[CURL_TELOPT_TTYPE] = CURL_YES;
+ continue;
+ }
+
+ /* Display variable */
+ if(curl_strequal(option_keyword, "XDISPLOC")) {
+ strncpy(tn->subopt_xdisploc, option_arg, 127);
+ tn->subopt_xdisploc[127] = 0; /* String termination */
+ tn->us_preferred[CURL_TELOPT_XDISPLOC] = CURL_YES;
+ continue;
+ }
+
+ /* Environment variable */
+ if(curl_strequal(option_keyword, "NEW_ENV")) {
+ buf = strdup(option_arg);
+ if(!buf)
+ return CURLE_OUT_OF_MEMORY;
+ tn->telnet_vars = curl_slist_append(tn->telnet_vars, buf);
+ tn->us_preferred[CURL_TELOPT_NEW_ENVIRON] = CURL_YES;
+ continue;
+ }
+
+ failf(data, "Unknown telnet option %s", head->data);
+ return CURLE_UNKNOWN_TELNET_OPTION;
+ } else {
+ failf(data, "Syntax error in telnet option: %s", head->data);
+ return CURLE_TELNET_OPTION_SYNTAX;
+ }
+ }
+
+ return CURLE_OK;
+}
+
+/*
+ * suboption()
+ *
+ * Look at the sub-option buffer, and try to be helpful to the other
+ * side.
+ */
+
+static void suboption(struct connectdata *conn)
+{
+ struct curl_slist *v;
+ unsigned char temp[2048];
+ ssize_t bytes_written;
+ size_t len;
+ size_t tmplen;
+ int err;
+ char varname[128];
+ char varval[128];
+ struct SessionHandle *data = conn->data;
+ struct TELNET *tn = (struct TELNET *)data->reqdata.proto.telnet;
+
+ printsub(data, '<', (unsigned char *)tn->subbuffer, CURL_SB_LEN(tn)+2);
+ switch (CURL_SB_GET(tn)) {
+ case CURL_TELOPT_TTYPE:
+ len = strlen(tn->subopt_ttype) + 4 + 2;
+ snprintf((char *)temp, sizeof(temp),
+ "%c%c%c%c%s%c%c", CURL_IAC, CURL_SB, CURL_TELOPT_TTYPE,
+ CURL_TELQUAL_IS, tn->subopt_ttype, CURL_IAC, CURL_SE);
+ bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
+ if(bytes_written < 0) {
+ err = Curl_sockerrno();
+ failf(data,"Sending data failed (%d)",err);
+ }
+ printsub(data, '>', &temp[2], len-2);
+ break;
+ case CURL_TELOPT_XDISPLOC:
+ len = strlen(tn->subopt_xdisploc) + 4 + 2;
+ snprintf((char *)temp, sizeof(temp),
+ "%c%c%c%c%s%c%c", CURL_IAC, CURL_SB, CURL_TELOPT_XDISPLOC,
+ CURL_TELQUAL_IS, tn->subopt_xdisploc, CURL_IAC, CURL_SE);
+ bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
+ if(bytes_written < 0) {
+ err = Curl_sockerrno();
+ failf(data,"Sending data failed (%d)",err);
+ }
+ printsub(data, '>', &temp[2], len-2);
+ break;
+ case CURL_TELOPT_NEW_ENVIRON:
+ snprintf((char *)temp, sizeof(temp),
+ "%c%c%c%c", CURL_IAC, CURL_SB, CURL_TELOPT_NEW_ENVIRON,
+ CURL_TELQUAL_IS);
+ len = 4;
+
+ for(v = tn->telnet_vars;v;v = v->next) {
+ tmplen = (strlen(v->data) + 1);
+ /* Add the variable only if it fits */
+ if(len + tmplen < (int)sizeof(temp)-6) {
+ sscanf(v->data, "%127[^,],%127s", varname, varval);
+ snprintf((char *)&temp[len], sizeof(temp) - len,
+ "%c%s%c%s", CURL_NEW_ENV_VAR, varname,
+ CURL_NEW_ENV_VALUE, varval);
+ len += tmplen;
+ }
+ }
+ snprintf((char *)&temp[len], sizeof(temp) - len,
+ "%c%c", CURL_IAC, CURL_SE);
+ len += 2;
+ bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
+ if(bytes_written < 0) {
+ err = Curl_sockerrno();
+ failf(data,"Sending data failed (%d)",err);
+ }
+ printsub(data, '>', &temp[2], len-2);
+ break;
+ }
+ return;
+}
+
+static
+void telrcv(struct connectdata *conn,
+ unsigned char *inbuf, /* Data received from socket */
+ ssize_t count) /* Number of bytes received */
+{
+ unsigned char c;
+ int in = 0;
+ struct SessionHandle *data = conn->data;
+ struct TELNET *tn = (struct TELNET *)data->reqdata.proto.telnet;
+
+ while(count--)
+ {
+ c = inbuf[in++];
+
+ switch (tn->telrcv_state)
+ {
+ case CURL_TS_CR:
+ tn->telrcv_state = CURL_TS_DATA;
+ if (c == '\0')
+ {
+ break; /* Ignore \0 after CR */
+ }
+
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)&c, 1);
+ continue;
+
+ case CURL_TS_DATA:
+ if (c == CURL_IAC)
+ {
+ tn->telrcv_state = CURL_TS_IAC;
+ break;
+ }
+ else if(c == '\r')
+ {
+ tn->telrcv_state = CURL_TS_CR;
+ }
+
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)&c, 1);
+ continue;
+
+ case CURL_TS_IAC:
+ process_iac:
+ switch (c)
+ {
+ case CURL_WILL:
+ tn->telrcv_state = CURL_TS_WILL;
+ continue;
+ case CURL_WONT:
+ tn->telrcv_state = CURL_TS_WONT;
+ continue;
+ case CURL_DO:
+ tn->telrcv_state = CURL_TS_DO;
+ continue;
+ case CURL_DONT:
+ tn->telrcv_state = CURL_TS_DONT;
+ continue;
+ case CURL_SB:
+ CURL_SB_CLEAR(tn);
+ tn->telrcv_state = CURL_TS_SB;
+ continue;
+ case CURL_IAC:
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)&c, 1);
+ break;
+ case CURL_DM:
+ case CURL_NOP:
+ case CURL_GA:
+ default:
+ printoption(data, "RCVD", CURL_IAC, c);
+ break;
+ }
+ tn->telrcv_state = CURL_TS_DATA;
+ continue;
+
+ case CURL_TS_WILL:
+ printoption(data, "RCVD", CURL_WILL, c);
+ tn->please_negotiate = 1;
+ rec_will(conn, c);
+ tn->telrcv_state = CURL_TS_DATA;
+ continue;
+
+ case CURL_TS_WONT:
+ printoption(data, "RCVD", CURL_WONT, c);
+ tn->please_negotiate = 1;
+ rec_wont(conn, c);
+ tn->telrcv_state = CURL_TS_DATA;
+ continue;
+
+ case CURL_TS_DO:
+ printoption(data, "RCVD", CURL_DO, c);
+ tn->please_negotiate = 1;
+ rec_do(conn, c);
+ tn->telrcv_state = CURL_TS_DATA;
+ continue;
+
+ case CURL_TS_DONT:
+ printoption(data, "RCVD", CURL_DONT, c);
+ tn->please_negotiate = 1;
+ rec_dont(conn, c);
+ tn->telrcv_state = CURL_TS_DATA;
+ continue;
+
+ case CURL_TS_SB:
+ if (c == CURL_IAC)
+ {
+ tn->telrcv_state = CURL_TS_SE;
+ }
+ else
+ {
+ CURL_SB_ACCUM(tn,c);
+ }
+ continue;
+
+ case CURL_TS_SE:
+ if (c != CURL_SE)
+ {
+ if (c != CURL_IAC)
+ {
+ /*
+ * This is an error. We only expect to get "IAC IAC" or "IAC SE".
+ * Several things may have happend. An IAC was not doubled, the
+ * IAC SE was left off, or another option got inserted into the
+ * suboption are all possibilities. If we assume that the IAC was
+ * not doubled, and really the IAC SE was left off, we could get
+ * into an infinate loop here. So, instead, we terminate the
+ * suboption, and process the partial suboption if we can.
+ */
+ CURL_SB_ACCUM(tn, CURL_IAC);
+ CURL_SB_ACCUM(tn, c);
+ tn->subpointer -= 2;
+ CURL_SB_TERM(tn);
+
+ printoption(data, "In SUBOPTION processing, RCVD", CURL_IAC, c);
+ suboption(conn); /* handle sub-option */
+ tn->telrcv_state = CURL_TS_IAC;
+ goto process_iac;
+ }
+ CURL_SB_ACCUM(tn,c);
+ tn->telrcv_state = CURL_TS_SB;
+ }
+ else
+ {
+ CURL_SB_ACCUM(tn, CURL_IAC);
+ CURL_SB_ACCUM(tn, CURL_SE);
+ tn->subpointer -= 2;
+ CURL_SB_TERM(tn);
+ suboption(conn); /* handle sub-option */
+ tn->telrcv_state = CURL_TS_DATA;
+ }
+ break;
+ }
+ }
+}
+
+CURLcode Curl_telnet_done(struct connectdata *conn, CURLcode status, bool premature)
+{
+ struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
+ (void)status; /* unused */
+ (void)premature; /* not used */
+
+ curl_slist_free_all(tn->telnet_vars);
+
+ free(conn->data->reqdata.proto.telnet);
+ conn->data->reqdata.proto.telnet = NULL;
+
+ return CURLE_OK;
+}
+
+CURLcode Curl_telnet(struct connectdata *conn, bool *done)
+{
+ CURLcode code;
+ struct SessionHandle *data = conn->data;
+ curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
+#ifdef USE_WINSOCK
+ HMODULE wsock2;
+ WSOCK2_FUNC close_event_func;
+ WSOCK2_FUNC create_event_func;
+ WSOCK2_FUNC event_select_func;
+ WSOCK2_FUNC enum_netevents_func;
+ WSAEVENT event_handle;
+ WSANETWORKEVENTS events;
+ HANDLE stdin_handle;
+ HANDLE objs[2];
+ DWORD obj_count;
+ DWORD wait_timeout;
+ DWORD waitret;
+ DWORD readfile_read;
+#else
+ int interval_ms;
+ struct pollfd pfd[2];
+#endif
+ ssize_t nread;
+ bool keepon = TRUE;
+ char *buf = data->state.buffer;
+ struct TELNET *tn;
+
+ *done = TRUE; /* uncontionally */
+
+ code = init_telnet(conn);
+ if(code)
+ return code;
+
+ tn = (struct TELNET *)data->reqdata.proto.telnet;
+
+ code = check_telnet_options(conn);
+ if(code)
+ return code;
+
+#ifdef USE_WINSOCK
+ /*
+ ** This functionality only works with WinSock >= 2.0. So,
+ ** make sure have it.
+ */
+ code = check_wsock2(data);
+ if (code)
+ return code;
+
+ /* OK, so we have WinSock 2.0. We need to dynamically */
+ /* load ws2_32.dll and get the function pointers we need. */
+ wsock2 = LoadLibrary("WS2_32.DLL");
+ if (wsock2 == NULL) {
+ failf(data,"failed to load WS2_32.DLL (%d)",GetLastError());
+ return CURLE_FAILED_INIT;
+ }
+
+ /* Grab a pointer to WSACreateEvent */
+ create_event_func = GetProcAddress(wsock2,"WSACreateEvent");
+ if (create_event_func == NULL) {
+ failf(data,"failed to find WSACreateEvent function (%d)",
+ GetLastError());
+ FreeLibrary(wsock2);
+ return CURLE_FAILED_INIT;
+ }
+
+ /* And WSACloseEvent */
+ close_event_func = GetProcAddress(wsock2,"WSACloseEvent");
+ if (close_event_func == NULL) {
+ failf(data,"failed to find WSACloseEvent function (%d)",
+ GetLastError());
+ FreeLibrary(wsock2);
+ return CURLE_FAILED_INIT;
+ }
+
+ /* And WSAEventSelect */
+ event_select_func = GetProcAddress(wsock2,"WSAEventSelect");
+ if (event_select_func == NULL) {
+ failf(data,"failed to find WSAEventSelect function (%d)",
+ GetLastError());
+ FreeLibrary(wsock2);
+ return CURLE_FAILED_INIT;
+ }
+
+ /* And WSAEnumNetworkEvents */
+ enum_netevents_func = GetProcAddress(wsock2,"WSAEnumNetworkEvents");
+ if (enum_netevents_func == NULL) {
+ failf(data,"failed to find WSAEnumNetworkEvents function (%d)",
+ GetLastError());
+ FreeLibrary(wsock2);
+ return CURLE_FAILED_INIT;
+ }
+
+ /* We want to wait for both stdin and the socket. Since
+ ** the select() function in winsock only works on sockets
+ ** we have to use the WaitForMultipleObjects() call.
+ */
+
+ /* First, create a sockets event object */
+ event_handle = (WSAEVENT)create_event_func();
+ if (event_handle == WSA_INVALID_EVENT) {
+ failf(data,"WSACreateEvent failed (%d)",WSAGetLastError());
+ FreeLibrary(wsock2);
+ return CURLE_FAILED_INIT;
+ }
+
+ /* The get the Windows file handle for stdin */
+ stdin_handle = GetStdHandle(STD_INPUT_HANDLE);
+
+ /* Create the list of objects to wait for */
+ objs[0] = event_handle;
+ objs[1] = stdin_handle;
+
+ /* Tell winsock what events we want to listen to */
+ if(event_select_func(sockfd, event_handle, FD_READ|FD_CLOSE) == SOCKET_ERROR) {
+ close_event_func(event_handle);
+ FreeLibrary(wsock2);
+ return 0;
+ }
+
+ /* If stdin_handle is a pipe, use PeekNamedPipe() method to check it,
+ else use the old WaitForMultipleObjects() way */
+ if(GetFileType(stdin_handle) == FILE_TYPE_PIPE) {
+ /* Don't wait for stdin_handle, just wait for event_handle */
+ obj_count = 1;
+ /* Check stdin_handle per 100 milliseconds */
+ wait_timeout = 100;
+ } else {
+ obj_count = 2;
+ wait_timeout = INFINITE;
+ }
+
+ /* Keep on listening and act on events */
+ while(keepon) {
+ waitret = WaitForMultipleObjects(obj_count, objs, FALSE, wait_timeout);
+ switch(waitret) {
+ case WAIT_TIMEOUT:
+ {
+ unsigned char outbuf[2];
+ int out_count = 0;
+ ssize_t bytes_written;
+ char *buffer = buf;
+
+ while(1) {
+ if(!PeekNamedPipe(stdin_handle, NULL, 0, NULL, &readfile_read, NULL)) {
+ keepon = FALSE;
+ break;
+ }
+ nread = readfile_read;
+
+ if(!nread)
+ break;
+
+ if(!ReadFile(stdin_handle, buf, sizeof(data->state.buffer),
+ &readfile_read, NULL)) {
+ keepon = FALSE;
+ break;
+ }
+ nread = readfile_read;
+
+ while(nread--) {
+ outbuf[0] = *buffer++;
+ out_count = 1;
+ if(outbuf[0] == CURL_IAC)
+ outbuf[out_count++] = CURL_IAC;
+
+ Curl_write(conn, conn->sock[FIRSTSOCKET], outbuf,
+ out_count, &bytes_written);
+ }
+ }
+ }
+ break;
+
+ case WAIT_OBJECT_0 + 1:
+ {
+ unsigned char outbuf[2];
+ int out_count = 0;
+ ssize_t bytes_written;
+ char *buffer = buf;
+
+ if(!ReadFile(stdin_handle, buf, sizeof(data->state.buffer),
+ &readfile_read, NULL)) {
+ keepon = FALSE;
+ break;
+ }
+ nread = readfile_read;
+
+ while(nread--) {
+ outbuf[0] = *buffer++;
+ out_count = 1;
+ if(outbuf[0] == CURL_IAC)
+ outbuf[out_count++] = CURL_IAC;
+
+ Curl_write(conn, conn->sock[FIRSTSOCKET], outbuf,
+ out_count, &bytes_written);
+ }
+ }
+ break;
+
+ case WAIT_OBJECT_0:
+ if(enum_netevents_func(sockfd, event_handle, &events)
+ != SOCKET_ERROR) {
+ if(events.lNetworkEvents & FD_READ) {
+ /* This reallu OUGHT to check its return code. */
+ (void)Curl_read(conn, sockfd, buf, BUFSIZE - 1, &nread);
+
+ telrcv(conn, (unsigned char *)buf, nread);
+
+ fflush(stdout);
+
+ /* Negotiate if the peer has started negotiating,
+ otherwise don't. We don't want to speak telnet with
+ non-telnet servers, like POP or SMTP. */
+ if(tn->please_negotiate && !tn->already_negotiated) {
+ negotiate(conn);
+ tn->already_negotiated = 1;
+ }
+ }
+
+ if(events.lNetworkEvents & FD_CLOSE) {
+ keepon = FALSE;
+ }
+ }
+ break;
+ }
+ }
+
+ /* We called WSACreateEvent, so call WSACloseEvent */
+ if (close_event_func(event_handle) == FALSE) {
+ infof(data,"WSACloseEvent failed (%d)",WSAGetLastError());
+ }
+
+ /* "Forget" pointers into the library we're about to free */
+ create_event_func = NULL;
+ close_event_func = NULL;
+ event_select_func = NULL;
+ enum_netevents_func = NULL;
+
+ /* We called LoadLibrary, so call FreeLibrary */
+ if (!FreeLibrary(wsock2))
+ infof(data,"FreeLibrary(wsock2) failed (%d)",GetLastError());
+#else
+ pfd[0].fd = sockfd;
+ pfd[0].events = POLLIN;
+ pfd[1].fd = 0;
+ pfd[1].events = POLLIN;
+ interval_ms = 1 * 1000;
+
+ while (keepon) {
+ switch (Curl_poll(pfd, 2, interval_ms)) {
+ case -1: /* error, stop reading */
+ keepon = FALSE;
+ continue;
+ case 0: /* timeout */
+ break;
+ default: /* read! */
+ if(pfd[1].revents & POLLIN) { /* read from stdin */
+ unsigned char outbuf[2];
+ int out_count = 0;
+ ssize_t bytes_written;
+ char *buffer = buf;
+
+ nread = read(0, buf, 255);
+
+ while(nread--) {
+ outbuf[0] = *buffer++;
+ out_count = 1;
+ if(outbuf[0] == CURL_IAC)
+ outbuf[out_count++] = CURL_IAC;
+
+ Curl_write(conn, conn->sock[FIRSTSOCKET], outbuf,
+ out_count, &bytes_written);
+ }
+ }
+
+ if(pfd[0].revents & POLLIN) {
+ /* This OUGHT to check the return code... */
+ (void)Curl_read(conn, sockfd, buf, BUFSIZE - 1, &nread);
+
+ /* if we receive 0 or less here, the server closed the connection and
+ we bail out from this! */
+ if (nread <= 0) {
+ keepon = FALSE;
+ break;
+ }
+
+ telrcv(conn, (unsigned char *)buf, nread);
+
+ /* Negotiate if the peer has started negotiating,
+ otherwise don't. We don't want to speak telnet with
+ non-telnet servers, like POP or SMTP. */
+ if(tn->please_negotiate && !tn->already_negotiated) {
+ negotiate(conn);
+ tn->already_negotiated = 1;
+ }
+ }
+ }
+ if(data->set.timeout) {
+ struct timeval now; /* current time */
+ now = Curl_tvnow();
+ if(Curl_tvdiff(now, conn->created)/1000 >= data->set.timeout) {
+ failf(data, "Time-out");
+ code = CURLE_OPERATION_TIMEOUTED;
+ keepon = FALSE;
+ }
+ }
+ }
+#endif
+ /* mark this as "no further transfer wanted" */
+ Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
+
+ return code;
+}
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-03 18:49:15 +0000