[5] | 1 | /*
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[18] | 2 | * NtripServerLinux.c
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[5] | 3 | *
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[398] | 4 | * Copyright (c) 2003...2007
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[5] | 5 | * German Federal Agency for Cartography and Geodesy (BKG)
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| 6 | *
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| 7 | * Developed for Networked Transport of RTCM via Internet Protocol (NTRIP)
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| 8 | * for streaming GNSS data over the Internet.
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| 9 | *
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| 10 | * Designed by Informatik Centrum Dortmund http://www.icd.de
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| 11 | *
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| 12 | * NTRIP is currently an experimental technology.
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| 13 | * The BKG disclaims any liability nor responsibility to any person or
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| 14 | * entity with respect to any loss or damage caused, or alleged to be
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| 15 | * caused, directly or indirectly by the use and application of the NTRIP
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| 16 | * technology.
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| 17 | *
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| 18 | * For latest information and updates, access:
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| 19 | * http://igs.ifag.de/index_ntrip.htm
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| 20 | *
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| 21 | * Georg Weber
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| 22 | * BKG, Frankfurt, Germany, June 2003-06-13
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| 23 | * E-mail: euref-ip@bkg.bund.de
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| 24 | *
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| 25 | * Based on the GNU General Public License published nmead
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| 26 | *
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| 27 | * This program is free software; you can redistribute it and/or
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| 28 | * modify it under the terms of the GNU General Public License
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| 29 | * as published by the Free Software Foundation; either version 2
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| 30 | * of the License, or (at your option) any later version.
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| 31 | *
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| 32 | * This program is distributed in the hope that it will be useful,
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| 33 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 34 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 35 | * GNU General Public License for more details.
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| 36 | *
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| 37 | * You should have received a copy of the GNU General Public License
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| 38 | * along with this program; if not, write to the Free Software
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| 39 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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| 40 | * USA.
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| 41 | */
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| 42 |
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[398] | 43 | /*
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[18] | 44 | * Changes - Version 0.7
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| 45 | * Sep 22 2003 Steffen Tschirpke <St.Tschirpke@actina.de>
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[5] | 46 | * - socket support
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| 47 | * - command line option handling
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| 48 | * - error handling
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| 49 | * - help screen
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[18] | 50 | *
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| 51 | * Changes - Version 0.9
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| 52 | * Feb 15 2005 Dirk Stoecker <soft@dstoecker.de>
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| 53 | * - some minor updates, fixed serial baudrate settings
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| 54 | *
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| 55 | * Changes - Version 0.10
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| 56 | * Apr 05 2005 Dirk Stoecker <soft@dstoecker.de>
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| 57 | * - some cleanup and miscellaneous fixes
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| 58 | * - replaced non-working simulate with file input (stdin)
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| 59 | * - TCP sending now somewhat more stable
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| 60 | * - cleanup of error handling
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[24] | 61 | * - Modes may be symbolic and not only numeric
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[23] | 62 | *
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| 63 | * Changes - Version 0.11
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| 64 | * Jun 02 2005 Dirk Stoecker <soft@dstoecker.de>
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| 65 | * - added SISNeT support
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| 66 | * - added UDP support
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| 67 | * - cleanup of host and port handling
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| 68 | * - added inactivity alarm of 60 seconds
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[24] | 69 | *
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| 70 | * Changes - Version 0.12
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| 71 | * Jun 07 2005 Dirk Stoecker <soft@dstoecker.de>
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| 72 | * - added UDP bindmode
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[32] | 73 | *
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| 74 | * Changes - Version 0.13
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| 75 | * Apr 25 2006 Andrea Stuerze <andrea.stuerze@bkg.bund.de>
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| 76 | * - added stream retrieval from caster
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| 77 | *
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| 78 | * Changes - Version 0.14
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[45] | 79 | * May 16 2006 Andrea Stuerze <andrea.stuerze@bkg.bund.de>
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[398] | 80 | * - bug fixed in base64_encode-function
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[45] | 81 | *
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| 82 | * Changes - Version 0.15
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| 83 | * Jun 02 2006 Georg Weber <georg.weber@bkg.bund.de>
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| 84 | * - modification for SISNeT 3.1 protocol
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| 85 | *
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| 86 | * Changes - Version 0.16
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| 87 | * Jul 06 2006 Andrea Stuerze <andrea.stuerze@bkg.bund.de>
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| 88 | * - more flexible caster's response
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| 89 | *
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| 90 | * Changes - Version 0.17
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| 91 | * Jul 27 2006 Dirk Stoecker <soft@dstoecker.de>
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[32] | 92 | * - fixed some problems with caster download
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[45] | 93 | * - some minor cosmetic changes
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[32] | 94 | *
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[326] | 95 | * Changes - Version 0.18
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[398] | 96 | * Oct 30 2006 Andrea Stuerze <andrea.stuerze@bkg.bund.de>
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| 97 | * - added possibility to send receiver ID with password
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| 98 | * restricted to mode UDPSOCKET and TCPSOCKET.
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| 99 | *
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| 100 | * Changes - Version 0.19
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| 101 | * Nov 30 2006 Andrea Stuerze <andrea.stuerze@bkg.bund.de>
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| 102 | * - bug fixed in Mode 2
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| 103 | *
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| 104 | * Changes - Version 0.20
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| 105 | * Feb 13 2007 Dirk Stoecker <soft@dstoecker.de>
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[326] | 106 | * - default port changed from 80 to 2101
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[398] | 107 | * - fixed illegal memory access
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| 108 | * - cleanup of no data alarm timer
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| 109 | * - fixed zero byte handling in buffers
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[326] | 110 | *
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[5] | 111 | */
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| 112 |
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[18] | 113 | #include <ctype.h>
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| 114 | #include <errno.h>
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| 115 | #include <fcntl.h>
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| 116 | #include <getopt.h>
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| 117 | #include <netdb.h>
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[23] | 118 | #include <signal.h>
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[5] | 119 | #include <stdio.h>
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[18] | 120 | #include <stdlib.h>
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[5] | 121 | #include <string.h>
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| 122 | #include <unistd.h>
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[18] | 123 | #include <arpa/inet.h>
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| 124 | #include <netinet/in.h>
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[5] | 125 | #include <sys/socket.h>
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| 126 | #include <sys/termios.h>
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[18] | 127 | #include <sys/types.h>
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[5] | 128 |
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[18] | 129 | #ifndef MSG_DONTWAIT
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| 130 | #define MSG_DONTWAIT 0 /* prevent compiler errors */
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| 131 | #endif
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| 132 | #ifndef O_EXLOCK
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| 133 | #define O_EXLOCK 0 /* prevent compiler errors */
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| 134 | #endif
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[5] | 135 |
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[32] | 136 | enum MODE { SERIAL = 1, TCPSOCKET = 2, INFILE = 3, SISNET = 4, UDPSOCKET = 5,
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[49] | 137 | CASTER = 6, LAST};
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[5] | 138 |
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[398] | 139 | #define VERSION "NTRIP NtripServerLinux/0.20"
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[18] | 140 | #define BUFSZ 1024
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| 141 |
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[5] | 142 | /* default socket source */
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[326] | 143 | #define SERV_HOST_ADDR "localhost"
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| 144 | #define SERV_TCP_PORT 2101
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[5] | 145 |
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| 146 | /* default destination */
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[18] | 147 | #define NTRIP_CASTER "www.euref-ip.net"
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[398] | 148 | #define NTRIP_PORT 2101
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[5] | 149 |
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[23] | 150 | /* default sisnet source */
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| 151 | #define SISNET_SERVER "131.176.49.142"
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| 152 | #define SISNET_PORT 7777
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| 153 |
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| 154 | #define ALARMTIME 60
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| 155 |
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[22] | 156 | static int ttybaud = 19200;
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| 157 | static const char *ttyport = "/dev/gps";
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| 158 | static const char *filepath = "/dev/stdin";
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| 159 | static enum MODE mode = INFILE;
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[45] | 160 | static int sisnet = 31;
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[23] | 161 | static int gpsfd = -1;
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[5] | 162 |
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| 163 | /* Forward references */
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[22] | 164 | static int openserial(const char * tty, int blocksz, int baud);
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[45] | 165 | static void send_receive_loop(int sock, int fd);
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[22] | 166 | static void usage(int);
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[32] | 167 | static int encode(char *buf, int size, const char *user, const char *pwd);
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[5] | 168 |
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[30] | 169 | #ifdef __GNUC__
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| 170 | static __attribute__ ((noreturn)) void sighandler_alarm(
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| 171 | int sig __attribute__((__unused__)))
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| 172 | #else /* __GNUC__ */
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| 173 | static void sighandler_alarm(int sig)
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| 174 | #endif /* __GNUC__ */
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[23] | 175 | {
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| 176 | fprintf(stderr, "ERROR: more than %d seconds no activity\n", ALARMTIME);
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| 177 | exit(1);
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| 178 | }
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| 179 |
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[5] | 180 | /*
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| 181 | * main
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| 182 | *
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| 183 | * Main entry point for the program. Processes command-line arguments and
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| 184 | * prepares for action.
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| 185 | *
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| 186 | * Parameters:
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| 187 | * argc : integer : Number of command-line arguments.
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[32] | 188 | * argv : array of char : Command-line arguments as an array of
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| 189 | * zero-terminated pointers to strings.
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[5] | 190 | *
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| 191 | * Return Value:
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| 192 | * The function does not return a value (although its return type is int).
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| 193 | *
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| 194 | * Remarks:
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| 195 | *
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| 196 | */
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| 197 |
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[18] | 198 | int main(int argc, char **argv)
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[5] | 199 | {
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[23] | 200 | int c;
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[18] | 201 | int size = 2048; /* for setting send buffer size */
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| 202 |
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[23] | 203 | const char *inhost = 0;
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| 204 | const char *outhost = 0;
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| 205 | unsigned int outport = 0;
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| 206 | unsigned int inport = 0;
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[22] | 207 | const char *mountpoint = NULL;
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| 208 | const char *password = "";
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[23] | 209 | const char *sisnetpassword = "";
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| 210 | const char *sisnetuser = "";
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[32] | 211 |
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| 212 | const char *stream_name=0;
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| 213 | const char *stream_user=0;
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| 214 | const char *stream_password=0;
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| 215 |
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[22] | 216 | const char *initfile = NULL;
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[398] | 217 |
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| 218 | const char *recvrid=0;
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| 219 | const char *recvrpwd=0;
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| 220 |
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[24] | 221 | int bindmode = 0;
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[18] | 222 | int sock_id;
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| 223 | char szSendBuffer[BUFSZ];
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| 224 | int nBufferBytes;
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[23] | 225 | struct hostent *he;
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| 226 | struct sockaddr_in addr;
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[5] | 227 |
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[23] | 228 | signal(SIGALRM,sighandler_alarm);
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| 229 | alarm(ALARMTIME);
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[18] | 230 | /* get and check program arguments */
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| 231 | if(argc <= 1)
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| 232 | {
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| 233 | usage(2);
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| 234 | exit(1);
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| 235 | }
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[398] | 236 | while((c = getopt(argc, argv, "M:i:h:b:p:s:a:m:c:H:P:f:x:y:l:u:V:D:U:W:B"))
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[32] | 237 | != EOF)
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[18] | 238 | {
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| 239 | switch (c)
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[5] | 240 | {
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[18] | 241 | case 'M':
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[49] | 242 | if(!strcmp(optarg, "serial")) mode = SERIAL;
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| 243 | else if(!strcmp(optarg, "tcpsocket")) mode = TCPSOCKET;
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| 244 | else if(!strcmp(optarg, "file")) mode = INFILE;
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| 245 | else if(!strcmp(optarg, "sisnet")) mode = SISNET;
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| 246 | else if(!strcmp(optarg, "udpsocket")) mode = UDPSOCKET;
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| 247 | else if(!strcmp(optarg, "caster")) mode = CASTER;
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[21] | 248 | else mode = atoi(optarg);
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[49] | 249 | if((mode == 0) || (mode >= LAST))
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[18] | 250 | {
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| 251 | fprintf(stderr, "ERROR: can't convert %s to a valid mode\n", optarg);
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| 252 | usage(-1);
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| 253 | }
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| 254 | break;
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[22] | 255 | case 'i': /* gps serial ttyport */
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| 256 | ttyport = optarg;
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[18] | 257 | break;
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[24] | 258 | case 'B':
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| 259 | bindmode = 1;
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| 260 | break;
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[23] | 261 | case 'V':
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[45] | 262 | if(!strcmp("3.0", optarg)) sisnet = 30;
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| 263 | else if(!strcmp("3.1", optarg)) sisnet = 31;
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[48] | 264 | else if(!strcmp("2.1", optarg)) sisnet = 21;
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[45] | 265 | else
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[23] | 266 | {
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| 267 | fprintf(stderr, "ERROR: unknown SISNeT version %s\n", optarg);
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| 268 | usage(-2);
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| 269 | }
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[45] | 270 | break;
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[18] | 271 | case 'b': /* serial ttyin speed */
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| 272 | ttybaud = atoi(optarg);
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| 273 | if(ttybaud <= 1)
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| 274 | {
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[32] | 275 | fprintf(stderr, "ERROR: can't convert %s to valid serial speed\n",
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| 276 | optarg);
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[18] | 277 | usage(1);
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| 278 | }
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| 279 | break;
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| 280 | case 'a': /* http server IP address A.B.C.D */
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[23] | 281 | outhost = optarg;
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[18] | 282 | break;
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| 283 | case 'p': /* http server port */
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[23] | 284 | outport = atoi(optarg);
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| 285 | if(outport <= 1 || outport > 65535)
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[18] | 286 | {
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[32] | 287 | fprintf(stderr,
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| 288 | "ERROR: can't convert %s to a valid HTTP server port\n", optarg);
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[18] | 289 | usage(1);
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| 290 | }
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| 291 | break;
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| 292 | case 'm': /* http server mountpoint */
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| 293 | mountpoint = optarg;
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| 294 | break;
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[21] | 295 | case 's': /* datastream from file */
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[18] | 296 | filepath = optarg;
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| 297 | break;
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[21] | 298 | case 'f':
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| 299 | initfile = optarg;
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| 300 | break;
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[398] | 301 | case 'x':
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| 302 | recvrid = optarg;
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| 303 | break;
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| 304 | case 'y':
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| 305 | recvrpwd = optarg;
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| 306 | break;
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[23] | 307 | case 'u':
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| 308 | sisnetuser = optarg;
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| 309 | break;
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| 310 | case 'l':
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| 311 | sisnetpassword = optarg;
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| 312 | break;
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[398] | 313 | case 'c': /* DestinationCasterPassword */
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[18] | 314 | password = optarg;
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| 315 | break;
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[398] | 316 | case 'H': /* SourceCasterHost */
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[23] | 317 | inhost = optarg;
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[18] | 318 | break;
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[398] | 319 | case 'P': /* SourceCasterPort */
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[23] | 320 | inport = atoi(optarg);
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| 321 | if(inport <= 1 || inport > 65535)
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[18] | 322 | {
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[23] | 323 | fprintf(stderr, "ERROR: can't convert %s to a valid port number\n",
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[18] | 324 | optarg);
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| 325 | usage(1);
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| 326 | }
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| 327 | break;
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[32] | 328 | case 'D':
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| 329 | stream_name=optarg; /* desired stream from SourceCaster */
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| 330 | break;
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| 331 | case 'U':
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| 332 | stream_user=optarg; /* username for desired stream */
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| 333 | break;
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| 334 | case 'W':
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| 335 | stream_password=optarg; /* passwd for desired stream */
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| 336 | break;
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[18] | 337 | case 'h': /* help */
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| 338 | case '?':
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| 339 | usage(0);
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| 340 | break;
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| 341 | default:
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[5] | 342 | usage(2);
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[18] | 343 | break;
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[5] | 344 | }
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[18] | 345 | }
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| 346 |
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[5] | 347 | argc -= optind;
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| 348 | argv += optind;
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[18] | 349 |
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| 350 | if(argc > 0)
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| 351 | {
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| 352 | fprintf(stderr, "ERROR: Extra args on command line: ");
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| 353 | for(; argc > 0; argc--)
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[5] | 354 | {
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[18] | 355 | fprintf(stderr, " %s", *argv++);
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[5] | 356 | }
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[18] | 357 | fprintf(stderr, "\n");
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| 358 | usage(1); /* never returns */
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| 359 | }
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| 360 |
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| 361 | if(mountpoint == NULL)
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| 362 | {
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| 363 | fprintf(stderr, "ERROR: Missing mountpoint argument\n");
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| 364 | exit(1);
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| 365 | }
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| 366 | if(!password[0])
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| 367 | {
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[32] | 368 | fprintf(stderr,
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| 369 | "WARNING: Missing password argument - are you really sure?\n");
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[18] | 370 | }
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| 371 |
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[47] | 372 | if(stream_name && stream_user && !stream_password)
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[32] | 373 | {
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| 374 | fprintf(stderr, "WARNING: Missing password argument for download"
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| 375 | " - are you really sure?\n");
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| 376 | }
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| 377 |
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[23] | 378 | if(!outhost) outhost = NTRIP_CASTER;
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| 379 | if(!outport) outport = NTRIP_PORT;
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| 380 |
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| 381 | switch(mode)
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[18] | 382 | {
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| 383 | case INFILE:
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[5] | 384 | {
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[45] | 385 | if((gpsfd = open(filepath, O_RDONLY)) < 0)
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[18] | 386 | {
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| 387 | perror("ERROR: opening input file");
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| 388 | exit(1);
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| 389 | }
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[32] | 390 | /* set blocking mode in case it was not set
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| 391 | (seems to be sometimes for fifo's) */
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[18] | 392 | fcntl(gpsfd, F_SETFL, 0);
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| 393 | printf("file input: file = %s\n", filepath);
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[5] | 394 | }
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[18] | 395 | break;
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| 396 | case SERIAL: /* open serial port */
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[5] | 397 | {
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[22] | 398 | gpsfd = openserial(ttyport, 1, ttybaud);
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[18] | 399 | if(gpsfd < 0)
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| 400 | {
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| 401 | exit(1);
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| 402 | }
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[22] | 403 | printf("serial input: device = %s, speed = %d\n", ttyport, ttybaud);
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[5] | 404 | }
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[18] | 405 | break;
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[32] | 406 | case TCPSOCKET: case UDPSOCKET: case SISNET: case CASTER:
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[5] | 407 | {
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[23] | 408 | if(mode == SISNET)
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| 409 | {
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| 410 | if(!inhost) inhost = SISNET_SERVER;
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| 411 | if(!inport) inport = SISNET_PORT;
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| 412 | }
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[32] | 413 | else if(mode == CASTER)
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[23] | 414 | {
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[32] | 415 | if(!inport) inport = NTRIP_PORT;
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| 416 | if(!inhost) inhost = NTRIP_CASTER;
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| 417 | }
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| 418 | else if((mode == TCPSOCKET) || (mode == UDPSOCKET))
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| 419 | {
|
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[23] | 420 | if(!inport) inport = SERV_TCP_PORT;
|
---|
| 421 | if(!inhost) inhost = "127.0.0.1";
|
---|
[32] | 422 | }
|
---|
[18] | 423 |
|
---|
[23] | 424 | if(!(he = gethostbyname(inhost)))
|
---|
[5] | 425 | {
|
---|
[23] | 426 | fprintf(stderr, "ERROR: host %s unknown\n", inhost);
|
---|
| 427 | usage(-2);
|
---|
| 428 | }
|
---|
| 429 |
|
---|
[32] | 430 | if((gpsfd = socket(AF_INET, mode == UDPSOCKET
|
---|
| 431 | ? SOCK_DGRAM : SOCK_STREAM, 0)) < 0)
|
---|
[23] | 432 | {
|
---|
[18] | 433 | fprintf(stderr, "ERROR: can't create socket\n");
|
---|
| 434 | exit(1);
|
---|
[5] | 435 | }
|
---|
[18] | 436 |
|
---|
[23] | 437 | memset((char *) &addr, 0x00, sizeof(addr));
|
---|
[24] | 438 | if(!bindmode)
|
---|
| 439 | memcpy(&addr.sin_addr, he->h_addr, (size_t)he->h_length);
|
---|
[23] | 440 | addr.sin_family = AF_INET;
|
---|
| 441 | addr.sin_port = htons(inport);
|
---|
| 442 |
|
---|
[32] | 443 | printf("%s input: host = %s, port = %d, %s%s%s%s%s\n",
|
---|
| 444 | mode == CASTER ? "caster" : mode == SISNET ? "sisnet" :
|
---|
| 445 | mode == TCPSOCKET ? "tcp socket" : "udp socket",
|
---|
| 446 | bindmode ? "127.0.0.1" : inet_ntoa(addr.sin_addr),
|
---|
| 447 | inport, stream_name ? "stream = " : "", stream_name ? stream_name : "",
|
---|
| 448 | initfile ? ", initfile = " : "", initfile ? initfile : "",
|
---|
[45] | 449 | bindmode ? "binding mode" : "");
|
---|
[18] | 450 |
|
---|
[24] | 451 | if(bindmode)
|
---|
[5] | 452 | {
|
---|
[24] | 453 | if(bind(gpsfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
|
---|
| 454 | {
|
---|
| 455 | fprintf(stderr, "ERROR: can't bind input to port %d\n", inport);
|
---|
| 456 | exit(1);
|
---|
| 457 | }
|
---|
| 458 | }
|
---|
| 459 | else if(connect(gpsfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
|
---|
| 460 | {
|
---|
[18] | 461 | fprintf(stderr, "ERROR: can't connect input to %s at port %d\n",
|
---|
[23] | 462 | inet_ntoa(addr.sin_addr), inport);
|
---|
[18] | 463 | exit(1);
|
---|
[5] | 464 | }
|
---|
[32] | 465 |
|
---|
| 466 | if(stream_name) /* data stream from caster */
|
---|
| 467 | {
|
---|
| 468 | int init = 0;
|
---|
| 469 |
|
---|
| 470 | /* set socket buffer size */
|
---|
| 471 | setsockopt(gpsfd, SOL_SOCKET, SO_SNDBUF, (const char *) &size,
|
---|
| 472 | sizeof(const char *));
|
---|
| 473 | if(stream_user && stream_password)
|
---|
| 474 | {
|
---|
| 475 | /* leave some space for login */
|
---|
| 476 | nBufferBytes=snprintf(szSendBuffer, sizeof(szSendBuffer)-40,
|
---|
| 477 | "GET /%s HTTP/1.0\r\n"
|
---|
| 478 | "User-Agent: %s\r\n"
|
---|
| 479 | "Authorization: Basic ", stream_name, VERSION);
|
---|
| 480 | /* second check for old glibc */
|
---|
| 481 | if(nBufferBytes > (int)sizeof(szSendBuffer)-40 || nBufferBytes < 0)
|
---|
| 482 | {
|
---|
| 483 | fprintf(stderr, "Requested data too long\n");
|
---|
| 484 | exit(1);
|
---|
| 485 | }
|
---|
| 486 | nBufferBytes += encode(szSendBuffer+nBufferBytes,
|
---|
[339] | 487 | sizeof(szSendBuffer)-nBufferBytes-4, stream_user, stream_password);
|
---|
| 488 | if(nBufferBytes > (int)sizeof(szSendBuffer)-4)
|
---|
[32] | 489 | {
|
---|
| 490 | fprintf(stderr, "Username and/or password too long\n");
|
---|
| 491 | exit(1);
|
---|
| 492 | }
|
---|
[339] | 493 | szSendBuffer[nBufferBytes++] = '\r';
|
---|
| 494 | szSendBuffer[nBufferBytes++] = '\n';
|
---|
| 495 | szSendBuffer[nBufferBytes++] = '\r';
|
---|
| 496 | szSendBuffer[nBufferBytes++] = '\n';
|
---|
[32] | 497 | }
|
---|
| 498 | else
|
---|
| 499 | {
|
---|
| 500 | nBufferBytes = snprintf(szSendBuffer, sizeof(szSendBuffer),
|
---|
| 501 | "GET /%s HTTP/1.0\r\n"
|
---|
| 502 | "User-Agent: %s\r\n"
|
---|
| 503 | "\r\n", stream_name, VERSION);
|
---|
| 504 | }
|
---|
| 505 | if((send(gpsfd, szSendBuffer, (size_t)nBufferBytes, 0))
|
---|
| 506 | != nBufferBytes)
|
---|
| 507 | {
|
---|
| 508 | fprintf(stderr, "ERROR: could not send to caster\n");
|
---|
| 509 | exit(1);
|
---|
| 510 | }
|
---|
| 511 | nBufferBytes = 0;
|
---|
| 512 | /* check caster's response */
|
---|
| 513 | while(!init && nBufferBytes < (int)sizeof(szSendBuffer)
|
---|
| 514 | && (nBufferBytes += recv(gpsfd, szSendBuffer,
|
---|
| 515 | sizeof(szSendBuffer)-nBufferBytes, 0)) > 0)
|
---|
| 516 | {
|
---|
| 517 | if(strstr(szSendBuffer, "\r\n"))
|
---|
| 518 | {
|
---|
| 519 | if(!strncmp(szSendBuffer, "ICY 200 OK\r\n", 10))
|
---|
| 520 | init = 1;
|
---|
| 521 | else
|
---|
| 522 | {
|
---|
| 523 | int k;
|
---|
| 524 | fprintf(stderr, "Could not get the requested data: ");
|
---|
| 525 | for(k = 0; k < nBufferBytes && szSendBuffer[k] != '\n'
|
---|
| 526 | && szSendBuffer[k] != '\r'; ++k)
|
---|
| 527 | {
|
---|
| 528 | fprintf(stderr, "%c", isprint(szSendBuffer[k])
|
---|
| 529 | ? szSendBuffer[k] : '.');
|
---|
| 530 | }
|
---|
| 531 | fprintf(stderr, "\n");
|
---|
| 532 | exit(1);
|
---|
| 533 | }
|
---|
| 534 | }
|
---|
| 535 | }
|
---|
| 536 | if(!init)
|
---|
| 537 | {
|
---|
| 538 | fprintf(stderr, "Could not init caster download.");
|
---|
| 539 | exit(1);
|
---|
| 540 | }
|
---|
| 541 | } /* end data stream from caster */
|
---|
| 542 |
|
---|
[23] | 543 | if(initfile && mode != SISNET)
|
---|
[21] | 544 | {
|
---|
| 545 | char buffer[1024];
|
---|
| 546 | FILE *fh;
|
---|
| 547 | int i;
|
---|
| 548 |
|
---|
| 549 | if((fh = fopen(initfile, "r")))
|
---|
| 550 | {
|
---|
| 551 | while((i = fread(buffer, 1, sizeof(buffer), fh)) > 0)
|
---|
| 552 | {
|
---|
[22] | 553 | if((send(gpsfd, buffer, (size_t)i, 0)) != i)
|
---|
[21] | 554 | {
|
---|
| 555 | perror("ERROR: sending init file");
|
---|
| 556 | exit(1);
|
---|
| 557 | }
|
---|
| 558 | }
|
---|
| 559 | if(i < 0)
|
---|
| 560 | {
|
---|
| 561 | perror("ERROR: reading init file");
|
---|
| 562 | exit(1);
|
---|
| 563 | }
|
---|
| 564 | fclose(fh);
|
---|
| 565 | }
|
---|
| 566 | else
|
---|
| 567 | {
|
---|
| 568 | fprintf(stderr, "ERROR: can't read init file %s\n", initfile);
|
---|
| 569 | exit(1);
|
---|
| 570 | }
|
---|
| 571 | }
|
---|
[5] | 572 | }
|
---|
[23] | 573 | if(mode == SISNET)
|
---|
| 574 | {
|
---|
| 575 | int i, j;
|
---|
| 576 | char buffer[1024];
|
---|
| 577 |
|
---|
[45] | 578 | i = snprintf(buffer, sizeof(buffer), sisnet >= 30 ? "AUTH,%s,%s\r\n"
|
---|
[32] | 579 | : "AUTH,%s,%s", sisnetuser, sisnetpassword);
|
---|
[23] | 580 | if((send(gpsfd, buffer, (size_t)i, 0)) != i)
|
---|
| 581 | {
|
---|
| 582 | perror("ERROR: sending authentication");
|
---|
| 583 | exit(1);
|
---|
| 584 | }
|
---|
[45] | 585 | i = sisnet >= 30 ? 7 : 5;
|
---|
[23] | 586 | if((j = recv(gpsfd, buffer, i, 0)) != i && strncmp("*AUTH", buffer, 5))
|
---|
| 587 | {
|
---|
| 588 | fprintf(stderr, "ERROR: SISNeT connect failed:");
|
---|
| 589 | for(i = 0; i < j; ++i)
|
---|
| 590 | {
|
---|
| 591 | if(buffer[i] != '\r' && buffer[i] != '\n')
|
---|
| 592 | {
|
---|
| 593 | fprintf(stderr, "%c", isprint(buffer[i]) ? buffer[i] : '.');
|
---|
| 594 | }
|
---|
| 595 | }
|
---|
| 596 | fprintf(stderr, "\n");
|
---|
| 597 | exit(1);
|
---|
| 598 | }
|
---|
[45] | 599 | if(sisnet >= 31)
|
---|
| 600 | {
|
---|
| 601 | if((send(gpsfd, "START\r\n", 7, 0)) != i)
|
---|
| 602 | {
|
---|
| 603 | perror("ERROR: sending start command");
|
---|
| 604 | exit(1);
|
---|
| 605 | }
|
---|
| 606 | }
|
---|
[23] | 607 | }
|
---|
[398] | 608 |
|
---|
| 609 | if (recvrid && recvrpwd && ((mode == TCPSOCKET) || (mode == UDPSOCKET)))
|
---|
| 610 | {
|
---|
| 611 | if (strlen(recvrid) > (BUFSZ-3)){
|
---|
| 612 | fprintf(stderr, "Receiver ID too long\n"); exit(0);
|
---|
| 613 | }else{
|
---|
| 614 | fprintf(stderr, "Sending user ID for receiver...\n");
|
---|
| 615 | nBufferBytes = read(gpsfd, szSendBuffer, BUFSZ);
|
---|
| 616 | strcpy(szSendBuffer, recvrid);
|
---|
| 617 | strcat(szSendBuffer,"\r\n");
|
---|
| 618 | send(gpsfd,szSendBuffer, strlen(szSendBuffer), MSG_DONTWAIT);
|
---|
| 619 | }
|
---|
| 620 |
|
---|
| 621 | if (strlen(recvrpwd) > (BUFSZ-3)){
|
---|
| 622 | fprintf(stderr, "Receiver password too long\n"); exit(0);
|
---|
| 623 | }else{
|
---|
| 624 | fprintf(stderr, "Sending user password for receiver...\n");
|
---|
| 625 | nBufferBytes = read(gpsfd, szSendBuffer, BUFSZ);
|
---|
| 626 | strcpy(szSendBuffer, recvrpwd);
|
---|
| 627 | strcat(szSendBuffer,"\r\n");
|
---|
| 628 | send(gpsfd, szSendBuffer, strlen(szSendBuffer), MSG_DONTWAIT);
|
---|
| 629 | }
|
---|
| 630 | }
|
---|
[18] | 631 | break;
|
---|
| 632 | default:
|
---|
| 633 | usage(-1);
|
---|
| 634 | break;
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 | /* ----- main part ----- */
|
---|
[50] | 638 | for(;;)
|
---|
[18] | 639 | {
|
---|
[23] | 640 | if(!(he = gethostbyname(outhost)))
|
---|
| 641 | {
|
---|
| 642 | fprintf(stderr, "ERROR: host %s unknown\n", outhost);
|
---|
| 643 | usage(-2);
|
---|
| 644 | }
|
---|
| 645 |
|
---|
[18] | 646 | /* create socket */
|
---|
| 647 | if((sock_id = socket(AF_INET, SOCK_STREAM, 0)) < 0)
|
---|
[5] | 648 | {
|
---|
[23] | 649 | fprintf(stderr, "ERROR: could not create socket\n");
|
---|
[18] | 650 | exit(2);
|
---|
[5] | 651 | }
|
---|
[23] | 652 |
|
---|
| 653 | memset((char *) &addr, 0x00, sizeof(addr));
|
---|
| 654 | memcpy(&addr.sin_addr, he->h_addr, (size_t)he->h_length);
|
---|
| 655 | addr.sin_family = AF_INET;
|
---|
| 656 | addr.sin_port = htons(outport);
|
---|
| 657 |
|
---|
[18] | 658 | /* connect to caster */
|
---|
| 659 | fprintf(stderr, "caster output: host = %s, port = %d, mountpoint = %s\n",
|
---|
[23] | 660 | inet_ntoa(addr.sin_addr), outport, mountpoint);
|
---|
| 661 | if(connect(sock_id, (struct sockaddr *) &addr, sizeof(addr)) < 0)
|
---|
[18] | 662 | {
|
---|
| 663 | fprintf(stderr, "ERROR: can't connect output to %s at port %d\n",
|
---|
[23] | 664 | inet_ntoa(addr.sin_addr), outport);
|
---|
[18] | 665 | close(sock_id);
|
---|
| 666 | exit(3);
|
---|
| 667 | }
|
---|
| 668 |
|
---|
| 669 | /* set socket buffer size */
|
---|
| 670 | setsockopt(sock_id, SOL_SOCKET, SO_SNDBUF, (const char *) &size,
|
---|
| 671 | sizeof(const char *));
|
---|
| 672 | /* send message to caster */
|
---|
[339] | 673 | nBufferBytes = sprintf(szSendBuffer, "SOURCE %s /%s\r\nSource-Agent: "
|
---|
| 674 | VERSION "\r\n\r\n", password, mountpoint);
|
---|
[22] | 675 | if((send(sock_id, szSendBuffer, (size_t)nBufferBytes, 0)) != nBufferBytes)
|
---|
[18] | 676 | {
|
---|
| 677 | fprintf(stderr, "ERROR: could not send to caster\n");
|
---|
[50] | 678 | break;
|
---|
[18] | 679 | }
|
---|
| 680 | /* check caster's response */
|
---|
| 681 | nBufferBytes = recv(sock_id, szSendBuffer, sizeof(szSendBuffer), 0);
|
---|
| 682 | szSendBuffer[nBufferBytes] = '\0';
|
---|
[45] | 683 | if(!strstr(szSendBuffer, "OK"))
|
---|
[18] | 684 | {
|
---|
| 685 | char *a;
|
---|
| 686 | fprintf(stderr, "ERROR: caster's reply is not OK : ");
|
---|
| 687 | for(a = szSendBuffer; *a && *a != '\n' && *a != '\r'; ++a)
|
---|
| 688 | {
|
---|
| 689 | fprintf(stderr, "%.1s", isprint(*a) ? a : ".");
|
---|
| 690 | }
|
---|
| 691 | fprintf(stderr, "\n");
|
---|
[50] | 692 | break;
|
---|
[18] | 693 | }
|
---|
[24] | 694 | printf("connection successfull\n");
|
---|
[45] | 695 | send_receive_loop(sock_id, gpsfd);
|
---|
[18] | 696 | }
|
---|
[50] | 697 | close(sock_id);
|
---|
| 698 | sleep(5);
|
---|
| 699 | return 0;
|
---|
[5] | 700 | }
|
---|
| 701 |
|
---|
[45] | 702 | static void send_receive_loop(int sock, int fd)
|
---|
[5] | 703 | {
|
---|
[51] | 704 | int nodata = 0;
|
---|
[18] | 705 | char buffer[BUFSZ] = { 0 };
|
---|
[23] | 706 | char sisnetbackbuffer[200];
|
---|
[30] | 707 | int nBufferBytes = 0;
|
---|
[18] | 708 | /* data transmission */
|
---|
[5] | 709 | printf("transfering data ...\n");
|
---|
| 710 | while(1)
|
---|
[18] | 711 | {
|
---|
[51] | 712 | if(!nodata) alarm(ALARMTIME);
|
---|
| 713 | else nodata = 0;
|
---|
[23] | 714 |
|
---|
[18] | 715 | if(!nBufferBytes)
|
---|
[5] | 716 | {
|
---|
[45] | 717 | if(mode == SISNET && sisnet <= 30)
|
---|
[23] | 718 | {
|
---|
| 719 | int i;
|
---|
| 720 | /* a somewhat higher rate than 1 second to get really each block */
|
---|
| 721 | /* means we need to skip double blocks sometimes */
|
---|
| 722 | struct timeval tv = {0,700000};
|
---|
| 723 | select(0, 0, 0, 0, &tv);
|
---|
| 724 | memcpy(sisnetbackbuffer, buffer, sizeof(sisnetbackbuffer));
|
---|
[45] | 725 | i = (sisnet >= 30 ? 5 : 3);
|
---|
[23] | 726 | if((send(gpsfd, "MSG\r\n", i, 0)) != i)
|
---|
| 727 | {
|
---|
| 728 | perror("ERROR: sending data request");
|
---|
| 729 | exit(1);
|
---|
| 730 | }
|
---|
| 731 | }
|
---|
[18] | 732 | /* receiving data */
|
---|
[32] | 733 | nBufferBytes = read(fd, buffer, sizeof(buffer));
|
---|
[18] | 734 | if(!nBufferBytes)
|
---|
| 735 | {
|
---|
| 736 | printf("WARNING: no data received from input\n");
|
---|
[398] | 737 | sleep(3);
|
---|
[51] | 738 | nodata = 1;
|
---|
[18] | 739 | continue;
|
---|
| 740 | }
|
---|
| 741 | else if(nBufferBytes < 0)
|
---|
| 742 | {
|
---|
| 743 | perror("ERROR: reading input failed");
|
---|
| 744 | exit(1);
|
---|
| 745 | }
|
---|
[32] | 746 | /* we can compare the whole buffer, as the additional bytes
|
---|
| 747 | remain unchanged */
|
---|
[46] | 748 | if(mode == SISNET && sisnet <= 30 &&
|
---|
| 749 | !memcmp(sisnetbackbuffer, buffer, sizeof(sisnetbackbuffer)))
|
---|
[23] | 750 | {
|
---|
| 751 | nBufferBytes = 0;
|
---|
| 752 | }
|
---|
[5] | 753 | }
|
---|
[23] | 754 | if(nBufferBytes)
|
---|
[18] | 755 | {
|
---|
[30] | 756 | int i;
|
---|
[23] | 757 | /* send data */
|
---|
| 758 | if((i = send(sock, buffer, (size_t)nBufferBytes, MSG_DONTWAIT))
|
---|
[32] | 759 | != nBufferBytes)
|
---|
[18] | 760 | {
|
---|
[34] | 761 | if(i < 0)
|
---|
[23] | 762 | {
|
---|
[34] | 763 | if(errno != EAGAIN)
|
---|
| 764 | {
|
---|
| 765 | perror("WARNING: could not send data - retry connection");
|
---|
| 766 | close(sock);
|
---|
| 767 | sleep(5);
|
---|
| 768 | return;
|
---|
| 769 | }
|
---|
[23] | 770 | }
|
---|
| 771 | else if(i)
|
---|
| 772 | {
|
---|
| 773 | memmove(buffer, buffer+i, (size_t)(nBufferBytes-i));
|
---|
| 774 | nBufferBytes -= i;
|
---|
| 775 | }
|
---|
[18] | 776 | }
|
---|
[23] | 777 | else
|
---|
[18] | 778 | {
|
---|
[23] | 779 | nBufferBytes = 0;
|
---|
[18] | 780 | }
|
---|
| 781 | }
|
---|
| 782 | }
|
---|
[5] | 783 | }
|
---|
| 784 |
|
---|
| 785 | /*
|
---|
| 786 | * openserial
|
---|
| 787 | *
|
---|
| 788 | * Open the serial port with the given device name and configure it for
|
---|
| 789 | * reading NMEA data from a GPS receiver.
|
---|
| 790 | *
|
---|
| 791 | * Parameters:
|
---|
| 792 | * tty : pointer to : A zero-terminated string containing the device
|
---|
| 793 | * unsigned char name of the appropriate serial port.
|
---|
| 794 | * blocksz : integer : Block size for port I/O
|
---|
[22] | 795 | * baud : integer : Baud rate for port I/O
|
---|
[5] | 796 | *
|
---|
| 797 | * Return Value:
|
---|
| 798 | * The function returns a file descriptor for the opened port if successful.
|
---|
| 799 | * The function returns -1 in the event of an error.
|
---|
| 800 | *
|
---|
| 801 | * Remarks:
|
---|
| 802 | *
|
---|
| 803 | */
|
---|
| 804 |
|
---|
[22] | 805 | static int openserial(const char * tty, int blocksz, int baud)
|
---|
[5] | 806 | {
|
---|
[18] | 807 | int fd;
|
---|
| 808 | struct termios termios;
|
---|
| 809 |
|
---|
| 810 | fd = open(tty, O_RDWR | O_NONBLOCK | O_EXLOCK);
|
---|
| 811 | if(fd < 0)
|
---|
| 812 | {
|
---|
| 813 | perror("ERROR: opening serial connection");
|
---|
[5] | 814 | return (-1);
|
---|
| 815 | }
|
---|
[18] | 816 | if(tcgetattr(fd, &termios) < 0)
|
---|
| 817 | {
|
---|
| 818 | perror("ERROR: get serial attributes");
|
---|
[5] | 819 | return (-1);
|
---|
| 820 | }
|
---|
| 821 | termios.c_iflag = 0;
|
---|
[18] | 822 | termios.c_oflag = 0; /* (ONLRET) */
|
---|
[5] | 823 | termios.c_cflag = CS8 | CLOCAL | CREAD;
|
---|
| 824 | termios.c_lflag = 0;
|
---|
| 825 | {
|
---|
[18] | 826 | int cnt;
|
---|
| 827 | for(cnt = 0; cnt < NCCS; cnt++)
|
---|
[5] | 828 | termios.c_cc[cnt] = -1;
|
---|
| 829 | }
|
---|
| 830 | termios.c_cc[VMIN] = blocksz;
|
---|
| 831 | termios.c_cc[VTIME] = 2;
|
---|
[18] | 832 |
|
---|
[5] | 833 | #if (B4800 != 4800)
|
---|
| 834 | /*
|
---|
[11] | 835 | * Not every system has speed settings equal to absolute speed value.
|
---|
[5] | 836 | */
|
---|
[18] | 837 |
|
---|
[22] | 838 | switch (baud)
|
---|
[18] | 839 | {
|
---|
| 840 | case 300:
|
---|
[22] | 841 | baud = B300;
|
---|
[18] | 842 | break;
|
---|
| 843 | case 1200:
|
---|
[22] | 844 | baud = B1200;
|
---|
[18] | 845 | break;
|
---|
| 846 | case 2400:
|
---|
[22] | 847 | baud = B2400;
|
---|
[18] | 848 | break;
|
---|
| 849 | case 4800:
|
---|
[22] | 850 | baud = B4800;
|
---|
[18] | 851 | break;
|
---|
| 852 | case 9600:
|
---|
[22] | 853 | baud = B9600;
|
---|
[18] | 854 | break;
|
---|
| 855 | case 19200:
|
---|
[22] | 856 | baud = B19200;
|
---|
[18] | 857 | break;
|
---|
| 858 | case 38400:
|
---|
[22] | 859 | baud = B38400;
|
---|
[18] | 860 | break;
|
---|
[11] | 861 | #ifdef B57600
|
---|
[18] | 862 | case 57600:
|
---|
[22] | 863 | baud = B57600;
|
---|
[18] | 864 | break;
|
---|
[11] | 865 | #endif
|
---|
| 866 | #ifdef B115200
|
---|
[18] | 867 | case 115200:
|
---|
[22] | 868 | baud = B115200;
|
---|
[18] | 869 | break;
|
---|
[11] | 870 | #endif
|
---|
| 871 | #ifdef B230400
|
---|
[18] | 872 | case 230400:
|
---|
[22] | 873 | baud = B230400;
|
---|
[18] | 874 | break;
|
---|
[11] | 875 | #endif
|
---|
[18] | 876 | default:
|
---|
| 877 | fprintf(stderr, "WARNING: Baud settings not useful, using 19200\n");
|
---|
[22] | 878 | baud = B19200;
|
---|
[18] | 879 | break;
|
---|
| 880 | }
|
---|
[5] | 881 | #endif
|
---|
[18] | 882 |
|
---|
[22] | 883 | if(cfsetispeed(&termios, baud) != 0)
|
---|
[18] | 884 | {
|
---|
| 885 | perror("ERROR: setting serial speed with cfsetispeed");
|
---|
| 886 | return (-1);
|
---|
| 887 | }
|
---|
[22] | 888 | if(cfsetospeed(&termios, baud) != 0)
|
---|
[18] | 889 | {
|
---|
| 890 | perror("ERROR: setting serial speed with cfsetospeed");
|
---|
| 891 | return (-1);
|
---|
| 892 | }
|
---|
| 893 | if(tcsetattr(fd, TCSANOW, &termios) < 0)
|
---|
| 894 | {
|
---|
| 895 | perror("ERROR: setting serial attributes");
|
---|
| 896 | return (-1);
|
---|
| 897 | }
|
---|
| 898 | if(fcntl(fd, F_SETFL, 0) == -1)
|
---|
| 899 | {
|
---|
| 900 | perror("WARNING: setting blocking mode failed");
|
---|
| 901 | }
|
---|
[5] | 902 | return (fd);
|
---|
| 903 | }
|
---|
| 904 |
|
---|
| 905 | /*
|
---|
| 906 | * usage
|
---|
| 907 | *
|
---|
| 908 | * Send a usage message to standard error and quit the program.
|
---|
| 909 | *
|
---|
| 910 | * Parameters:
|
---|
| 911 | * None.
|
---|
| 912 | *
|
---|
| 913 | * Return Value:
|
---|
| 914 | * The function does not return a value.
|
---|
| 915 | *
|
---|
| 916 | * Remarks:
|
---|
| 917 | *
|
---|
| 918 | */
|
---|
| 919 |
|
---|
[30] | 920 | static
|
---|
| 921 | #ifdef __GNUC__
|
---|
| 922 | __attribute__ ((noreturn))
|
---|
| 923 | #endif /* __GNUC__ */
|
---|
| 924 | void usage(int rc)
|
---|
[5] | 925 | {
|
---|
[18] | 926 | fprintf(stderr, "Usage: %s [OPTIONS]\n", VERSION);
|
---|
[32] | 927 | fprintf(stderr, " Options are: [-] \n");
|
---|
| 928 | fprintf(stderr, " -a DestinationCaster name or address (default: %s)\n",
|
---|
[18] | 929 | NTRIP_CASTER);
|
---|
[32] | 930 | fprintf(stderr, " -p DestinationCaster port (default: %d)\n", NTRIP_PORT);
|
---|
| 931 | fprintf(stderr, " -m DestinationCaster mountpoint\n");
|
---|
| 932 | fprintf(stderr, " -c DestinationCaster password\n");
|
---|
[18] | 933 | fprintf(stderr, " -h|? print this help screen\n");
|
---|
[32] | 934 | fprintf(stderr, " -M <mode> sets the input mode\n");
|
---|
| 935 | fprintf(stderr, " (1=serial, 2=tcpsocket, 3=file, 4=sisnet"
|
---|
| 936 | ", 5=udpsocket, 6=caster)\n");
|
---|
[18] | 937 | fprintf(stderr, " Mode = file:\n");
|
---|
| 938 | fprintf(stderr, " -s file, simulate data stream by reading log file\n");
|
---|
| 939 | fprintf(stderr, " default/current setting is %s\n", filepath);
|
---|
| 940 | fprintf(stderr, " Mode = serial:\n");
|
---|
| 941 | fprintf(stderr, " -b baud_rate, sets serial input baud rate\n");
|
---|
| 942 | fprintf(stderr, " default/current value is %d\n", ttybaud);
|
---|
| 943 | fprintf(stderr, " -i input_device, sets name of serial input device\n");
|
---|
| 944 | fprintf(stderr, " default/current value is %s\n", ttyport);
|
---|
| 945 | fprintf(stderr, " (normally a symbolic link to /dev/tty\?\?)\n");
|
---|
[23] | 946 | fprintf(stderr, " Mode = tcpsocket or udpsocket:\n");
|
---|
| 947 | fprintf(stderr, " -P receiver port (default: %d)\n", SERV_TCP_PORT);
|
---|
[32] | 948 | fprintf(stderr, " -H hostname of TCP server (default: %s)\n",
|
---|
| 949 | SERV_HOST_ADDR);
|
---|
[21] | 950 | fprintf(stderr, " -f initfile send to server\n");
|
---|
[398] | 951 | fprintf(stderr, " -x receiver id\n");
|
---|
| 952 | fprintf(stderr, " -y receiver password\n");
|
---|
[32] | 953 | fprintf(stderr, " -B bindmode: bind to incoming UDP stream\n");
|
---|
[23] | 954 | fprintf(stderr, " Mode = sisnet:\n");
|
---|
| 955 | fprintf(stderr, " -P receiver port (default: %d)\n", SISNET_PORT);
|
---|
[32] | 956 | fprintf(stderr, " -H hostname of TCP server (default: %s)\n",
|
---|
| 957 | SISNET_SERVER);
|
---|
[23] | 958 | fprintf(stderr, " -u username\n");
|
---|
| 959 | fprintf(stderr, " -l password\n");
|
---|
[45] | 960 | fprintf(stderr, " -V version [2.1, 3.0 or 3.1] (default: 3.1)\n");
|
---|
[32] | 961 | fprintf(stderr, " Mode = caster:\n");
|
---|
| 962 | fprintf(stderr, " -P SourceCaster port (default: %d)\n", NTRIP_PORT);
|
---|
| 963 | fprintf(stderr, " -H SourceCaster hostname (default: %s)\n",
|
---|
| 964 | NTRIP_CASTER);
|
---|
| 965 | fprintf(stderr, " -D SourceCaster mountpoint\n");
|
---|
| 966 | fprintf(stderr, " -U SourceCaster mountpoint username\n");
|
---|
| 967 | fprintf(stderr, " -W SourceCaster mountpoint password\n");
|
---|
[23] | 968 | fprintf(stderr, "\n");
|
---|
[18] | 969 | exit(rc);
|
---|
[5] | 970 | }
|
---|
[32] | 971 |
|
---|
| 972 | static const char encodingTable [64] = {
|
---|
| 973 | 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
|
---|
| 974 | 'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
|
---|
| 975 | 'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
|
---|
| 976 | 'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'
|
---|
| 977 | };
|
---|
| 978 |
|
---|
| 979 | /* does not buffer overrun, but breaks directly after an error */
|
---|
| 980 | /* returns the number of required bytes */
|
---|
| 981 | static int encode(char *buf, int size, const char *user, const char *pwd)
|
---|
| 982 | {
|
---|
| 983 | unsigned char inbuf[3];
|
---|
| 984 | char *out = buf;
|
---|
| 985 | int i, sep = 0, fill = 0, bytes = 0;
|
---|
| 986 |
|
---|
| 987 | while(*user || *pwd)
|
---|
| 988 | {
|
---|
| 989 | i = 0;
|
---|
| 990 | while(i < 3 && *user) inbuf[i++] = *(user++);
|
---|
| 991 | if(i < 3 && !sep) {inbuf[i++] = ':'; ++sep; }
|
---|
| 992 | while(i < 3 && *pwd) inbuf[i++] = *(pwd++);
|
---|
| 993 | while(i < 3) {inbuf[i++] = 0; ++fill; }
|
---|
| 994 | if(out-buf < size-1)
|
---|
| 995 | *(out++) = encodingTable[(inbuf [0] & 0xFC) >> 2];
|
---|
| 996 | if(out-buf < size-1)
|
---|
| 997 | *(out++) = encodingTable[((inbuf [0] & 0x03) << 4)
|
---|
| 998 | | ((inbuf [1] & 0xF0) >> 4)];
|
---|
| 999 | if(out-buf < size-1)
|
---|
| 1000 | {
|
---|
| 1001 | if(fill == 2)
|
---|
| 1002 | *(out++) = '=';
|
---|
| 1003 | else
|
---|
| 1004 | *(out++) = encodingTable[((inbuf [1] & 0x0F) << 2)
|
---|
| 1005 | | ((inbuf [2] & 0xC0) >> 6)];
|
---|
| 1006 | }
|
---|
| 1007 | if(out-buf < size-1)
|
---|
| 1008 | {
|
---|
| 1009 | if(fill >= 1)
|
---|
| 1010 | *(out++) = '=';
|
---|
| 1011 | else
|
---|
| 1012 | *(out++) = encodingTable[inbuf [2] & 0x3F];
|
---|
| 1013 | }
|
---|
| 1014 | bytes += 4;
|
---|
| 1015 | }
|
---|
| 1016 | if(out-buf < size)
|
---|
| 1017 | *out = 0;
|
---|
| 1018 | return bytes;
|
---|
| 1019 | }
|
---|