на сервере порт 21-й с клиентской наплевать какой для режима пользователя(telnet)!
далее при попытке передачи... сервер вернет клиенту PORT N... и открывается 2-й коннект
Код:
00001
00005 /*
00006 * Copyright (c) 1983, 1989 Regents of the University of California.
00007 * All rights reserved.
00008 *
00009 * Redistribution and use in source and binary forms, with or without
00010 * modification, are permitted provided that the following conditions
00011 * are met:
00012 * 1. Redistributions of source code must retain the above copyright
00013 * notice, this list of conditions and the following disclaimer.
00014 * 2. Redistributions in binary form must reproduce the above copyright
00015 * notice, this list of conditions and the following disclaimer in the
00016 * documentation and/or other materials provided with the distribution.
00017 * 3. All advertising materials mentioning features or use of this software
00018 * must display the following acknowledgement:
00019 * This product includes software developed by the University of
00020 * California, Berkeley and its contributors.
00021 * 4. Neither the name of the University nor the names of its contributors
00022 * may be used to endorse or promote products derived from this software
00023 * without specific prior written permission.
00024 *
00025 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
00026 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00027 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00028 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
00029 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00030 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00031 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00032 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00033 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00034 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00035 * SUCH DAMAGE.
00036 *
00037 * @(#)ftp.h 8.1 (Berkeley) 6/2/93
00038 */
00039
00040 #ifndef __ARPA_FTP_H
00041 #define __ARPA_FTP_H
00042
00043 /* Definitions for FTP; see RFC-765. */
00044
00045 /*
00046 * Reply codes.
00047 */
00048 #define PRELIM 1 /* positive preliminary */
00049 #define COMPLETE 2 /* positive completion */
00050 #define CONTINUE 3 /* positive intermediate */
00051 #define TRANSIENT 4 /* transient negative completion */
00052 #undef ERROR /* <wingdi.h> */
00053 #define ERROR 5 /* permanent negative completion */
00054
00055 /*
00056 * Type codes
00057 */
00058 #define TYPE_A 1 /* ASCII */
00059 #define TYPE_E 2 /* EBCDIC */
00060 #define TYPE_I 3 /* image */
00061 #define TYPE_L 4 /* local byte size */
00062
00063 #ifdef FTP_NAMES
00064 const char *typenames[] = {"0", "ASCII", "EBCDIC", "Image", "Local" };
00065 #endif
00066
00067 /*
00068 * Form codes
00069 */
00070 #define FORM_N 1 /* non-print */
00071 #define FORM_T 2 /* telnet format effectors */
00072 #define FORM_C 3 /* carriage control (ASA) */
00073 #ifdef FTP_NAMES
00074 const char *formnames[] = {"0", "Nonprint", "Telnet", "Carriage-control" };
00075 #endif
00076
00077 /*
00078 * Structure codes
00079 */
00080 #define STRU_F 1 /* file (no record structure) */
00081 #define STRU_R 2 /* record structure */
00082 #define STRU_P 3 /* page structure */
00083 #ifdef FTP_NAMES
00084 const char *strunames[] = {"0", "File", "Record", "Page" };
00085 #endif
00086
00087 /*
00088 * Mode types
00089 */
00090 #define MODE_S 1 /* stream */
00091 #define MODE_B 2 /* block */
00092 #define MODE_C 3 /* compressed */
00093 #ifdef FTP_NAMES
00094 const char *modenames[] = {"0", "Stream", "Block", "Compressed" };
00095 #endif
00096
00097 /*
00098 * Protection levels
00099 */
00100 #define PROT_C 1 /* clear */
00101 #define PROT_S 2 /* safe */
00102 #define PROT_P 3 /* private */
00103 #define PROT_E 4 /* confidential */
00104
00105 #ifdef FTP_NAMES
00106 const char *levelnames[] = {"0", "Clear", "Safe", "Private", "Confidential" };
00107 #endif
00108
00109 #if defined(KERBEROS) && defined(NOENCRYPTION)
00110 /* Define away krb_rd_priv and krb_mk_priv. Don't need them anyway.
00111 * This might not be the best place for this ...
00112 */
00113 #define krb_rd_priv(o,l,ses,s,h,c,m) krb_rd_safe(o,l,s,h,c,m)
00114 #define krb_mk_priv(i,o,l,ses,s,h,c) krb_mk_safe(i,o,l,s,h,c)
00115 #endif
00116
00117 /*
00118 * Record Tokens
00119 */
00120 #define REC_ESC '\377' /* Record-mode Escape */
00121 #define REC_EOR '\001' /* Record-mode End-of-Record */
00122 #define REC_EOF '\002' /* Record-mode End-of-File */
00123
00124 /*
00125 * Block Header
00126 */
00127 #define BLK_EOR 0x80 /* Block is End-of-Record */
00128 #define BLK_EOF 0x40 /* Block is End-of-File */
00129 #define BLK_ERRORS 0x20 /* Block is suspected of containing errors */
00130 #define BLK_RESTART 0x10 /* Block is Restart Marker */
00131
00132 #define BLK_BYTECOUNT 2 /* Bytes in this block */
00133
00134 #endif