[85e24a3] | 1 | /* FIXME: 1. Parse command is a hack. We can do better. |
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[86933ce0] | 2 | * 2. OSV: hooks support seems to be bad, as it requires storing of |
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[38371dbe] | 3 | * entire input file in memory. Seem to be better to change it to |
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[3f777d0e] | 4 | * something more reasonable, like having |
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| 5 | * 'hook_write(void const *buf, int count)' routine that will be |
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| 6 | * called multiple times while file is being received. |
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[86933ce0] | 7 | * 3. OSV: Remove hack with "/dev/null"? |
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[85e24a3] | 8 | * |
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[3f777d0e] | 9 | * FTP Server Daemon |
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[6d0e13c] | 10 | * |
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| 11 | * Submitted by: Jake Janovetz <janovetz@tempest.ece.uiuc.edu> |
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| 12 | * |
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[3f777d0e] | 13 | * Changed by: Sergei Organov <osv@javad.ru> (OSV) |
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[86933ce0] | 14 | * Arnout Vandecappelle <arnout@mind.be> (AV) |
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| 15 | * Sebastien Bourdeauducq <sebastien@milkymist.org> (MM) |
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| 16 | * |
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[38371dbe] | 17 | * |
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| 18 | * Changes: |
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| 19 | * |
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[ff49ffe] | 20 | * 2010-12-02 Sebastien Bourdeauducq <sebastien@milkymist.org> |
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| 21 | * |
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| 22 | * * Support spaces in filenames |
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| 23 | * |
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[86933ce0] | 24 | * 2010-04-29 Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> |
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| 25 | * |
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| 26 | * * Added USER/PASS authentication. |
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| 27 | * |
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[07fbfced] | 28 | * 2001-01-31 Sergei Organov <osv@javad.ru> |
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| 29 | * |
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| 30 | * * Hacks with current dir and root dir removed in favor of new libio |
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| 31 | * support for task-local current and root directories. |
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| 32 | * |
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| 33 | * 2001-01-30 Sergei Organov <osv@javad.ru> |
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| 34 | * |
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| 35 | * * Bug in `close_data_socket()' introduced by previous change fixed. |
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| 36 | * * `command_pasv()' changed to set timeout on socket we are listening on |
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| 37 | * and code fixed to don't close socket twice on error. |
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| 38 | * * `serr()' changed to clear `errno'. |
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| 39 | * * `data_socket()' changed to clear `errno' before `bind()'. |
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| 40 | * * `session()' changed to clear `errno' before processing session. |
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| 41 | * |
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| 42 | * 2001-01-29 Sergei Organov <osv@javad.ru> |
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| 43 | * |
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| 44 | * * `close_data_socket()' fixed to close both active and passive sockets |
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| 45 | * * Initialize info->data_socket to -1 in `daemon()' |
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| 46 | * * Initialize `fname' to empty string in `exec_command()' |
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| 47 | * |
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[38371dbe] | 48 | * 2001-01-22 Sergei Organov <osv@javad.ru> |
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| 49 | * |
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| 50 | * * Timeouts on sockets implemented. 'idle' field added to |
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| 51 | * configuration. No timeout by default to keep backward compatibility. |
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| 52 | * Note: SITE IDLE command not implemented yet. |
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| 53 | * * Basic global access control implemented. 'access' field added to |
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| 54 | * configuration. No access limitations by default to keep backward |
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| 55 | * compatibility. |
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| 56 | * |
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| 57 | * 2001-01-17 Sergei Organov <osv@javad.ru> |
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| 58 | * |
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| 59 | * * Anchor data socket for active mode (using self IP and port 20.) |
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| 60 | * * Fixed default data port support (still not tested). |
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| 61 | * * Don't allow IP address different from originating host in |
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| 62 | * PORT command to improve security. |
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| 63 | * * Fixed bug in MDTM command. |
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| 64 | * * Check for correctness of parsing of argument in command_port(). |
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| 65 | * * Fixed squeeze_path() to don't allow names like 'NAME/smth' where |
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| 66 | * 'NAME' is not a directory. |
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| 67 | * * Command parsing a little bit improved: command names are now |
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| 68 | * converted to upper-case to be more compatible with RFC (command |
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| 69 | * names are not case-sensitive.) |
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| 70 | * * Reformat comments so that they have RTEMS look-and-feel. |
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| 71 | * |
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| 72 | * 2001-01-16 Sergei Organov <osv@javad.ru> |
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| 73 | * |
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| 74 | * * Fixed DELE, SITE CHMOD, RMD, MKD broken by previous changes |
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| 75 | * * True ASCII mode implemented (doesn't work for hooks and /dev/null) |
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| 76 | * * Passive mode implemented, PASV command added. |
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| 77 | * * Default port for data connection could be used (untested, can't find |
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| 78 | * ftp client that doesn't send PORT command) |
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| 79 | * * SYST reply changed to UNIX, as former RTEMS isn't registered name. |
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| 80 | * * Reply codes reviewed and fixed. |
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| 81 | * |
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| 82 | * 2001-01-08 Sergei Organov <osv@javad.ru> |
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| 83 | * |
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| 84 | * * use pool of pre-created threads to handle sessions |
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| 85 | * * LIST output now similar to what "/bin/ls -al" would output, thus |
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[3f777d0e] | 86 | * FTP clients could parse it. |
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[38371dbe] | 87 | * * LIST NAME now works (both for files and directories) |
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| 88 | * * keep track of CWD for every session separately |
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| 89 | * * ability to specify root directory name in configuration table |
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| 90 | * * options sent in commands are ignored, thus LIST -al FILE works |
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| 91 | * * added support for NLST, CDUP and MDTM commands |
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| 92 | * * buffers are allocated on stack instead of heap where possible |
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| 93 | * * drop using of task notepad to pass parameters - use function |
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[3f777d0e] | 94 | * arguments instead |
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[38371dbe] | 95 | * * various bug-fixes, e.g., use of PF_INET in socket() instead of |
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[3f777d0e] | 96 | * AF_INET, use snprintf() instead of sprintf() everywhere for safety, |
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| 97 | * etc. |
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| 98 | * |
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[6d0e13c] | 99 | * $Id$ |
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| 100 | */ |
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| 101 | |
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[38371dbe] | 102 | /************************************************************************* |
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| 103 | * ftpd.c |
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| 104 | ************************************************************************* |
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| 105 | * Description: |
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| 106 | * |
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| 107 | * This file contains the daemon which services requests that appear |
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| 108 | * on the FTP port. This server is compatible with FTP, but it |
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| 109 | * also provides 'hooks' to make it usable in situations where files |
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| 110 | * are not used/necessary. Once the server is started, it runs |
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| 111 | * forever. |
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| 112 | * |
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| 113 | * |
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| 114 | * Organization: |
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| 115 | * |
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| 116 | * The FTP daemon is started upon boot along with a (configurable) |
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| 117 | * number of tasks to handle sessions. It runs all the time and |
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| 118 | * waits for connections on the known FTP port (21). When |
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| 119 | * a connection is made, it wakes-up a 'session' task. That |
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| 120 | * session then interacts with the remote host. When the session |
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| 121 | * is complete, the session task goes to sleep. The daemon still |
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| 122 | * runs, however. |
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| 123 | * |
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| 124 | * |
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| 125 | * Supported commands are: |
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| 126 | * |
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| 127 | * RETR xxx - Sends a file from the client. |
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| 128 | * STOR xxx - Receives a file from the client. xxx = filename. |
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| 129 | * LIST xxx - Sends a file list to the client. |
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| 130 | * NLST xxx - Sends a file list to the client. |
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| 131 | * USER - Does nothing. |
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| 132 | * PASS - Does nothing. |
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| 133 | * SYST - Replies with the system type (`RTEMS'). |
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| 134 | * DELE xxx - Delete file xxx. |
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| 135 | * MKD xxx - Create directory xxx. |
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| 136 | * RMD xxx - Remove directory xxx. |
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| 137 | * PWD - Print working directory. |
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| 138 | * CWD xxx - Change working directory. |
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| 139 | * CDUP - Change to upper directory. |
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| 140 | * SITE CHMOD xxx yyy - Change permissions on file yyy to xxx. |
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| 141 | * PORT a,b,c,d,x,y - Setup for a data port to IP address a.b.c.d |
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| 142 | * and port (x*256 + y). |
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| 143 | * MDTM xxx - Send file modification date/time to the client. |
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| 144 | * xxx = filename. |
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| 145 | * PASV - Use passive mode data connection. |
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| 146 | * |
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| 147 | * |
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| 148 | * The public routines contained in this file are: |
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| 149 | * |
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| 150 | * rtems_initialize_ftpd - Initializes and starts the server daemon, |
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| 151 | * then returns to its caller. |
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| 152 | * |
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| 153 | *------------------------------------------------------------------------ |
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| 154 | * Jake Janovetz |
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| 155 | * University of Illinois |
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| 156 | * 1406 West Green Street |
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| 157 | * Urbana IL 61801 |
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| 158 | ************************************************************************* |
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| 159 | * Change History: |
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| 160 | * 12/01/97 - Creation (JWJ) |
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| 161 | * 2001-01-08 - Changes by OSV |
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[86933ce0] | 162 | * 2010-04-29 - Authentication added by AV |
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[6d0e13c] | 163 | *************************************************************************/ |
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| 164 | |
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[38371dbe] | 165 | /************************************************************************* |
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[6d0e13c] | 166 | * Meanings of first and second digits of reply codes: |
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| 167 | * |
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| 168 | * Reply: Description: |
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| 169 | *-------- -------------- |
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| 170 | * 1yz Positive preliminary reply. The action is being started but |
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| 171 | * expect another reply before sending another command. |
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| 172 | * 2yz Positive completion reply. A new command can be sent. |
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[38371dbe] | 173 | * 3yz Positive intermediate reply. The command has been accepted |
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[6d0e13c] | 174 | * but another command must be sent. |
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| 175 | * 4yz Transient negative completion reply. The requested action did |
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| 176 | * not take place, but the error condition is temporary so the |
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| 177 | * command can be reissued later. |
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[3f777d0e] | 178 | * 5yz Permanent negative completion reply. The command was not |
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[6d0e13c] | 179 | * accepted and should not be retried. |
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| 180 | *------------------------------------------------------------------------- |
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| 181 | * x0z Syntax errors. |
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| 182 | * x1z Information. |
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| 183 | * x2z Connections. Replies referring to the control or data |
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| 184 | * connections. |
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| 185 | * x3z Authentication and accounting. Replies for the login or |
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| 186 | * accounting commands. |
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| 187 | * x4z Unspecified. |
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| 188 | * x5z Filesystem status. |
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| 189 | *************************************************************************/ |
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| 190 | |
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[2add452] | 191 | #if HAVE_CONFIG_H |
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| 192 | #include "config.h" |
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| 193 | #endif |
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| 194 | |
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[3f777d0e] | 195 | #include <stdio.h> |
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| 196 | #include <stdlib.h> |
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| 197 | #include <string.h> |
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| 198 | #include <unistd.h> |
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| 199 | #include <fcntl.h> |
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| 200 | #include <dirent.h> |
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| 201 | #include <errno.h> |
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[38371dbe] | 202 | #include <ctype.h> |
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[6d0e13c] | 203 | |
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[3f777d0e] | 204 | #include <rtems.h> |
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| 205 | #include <rtems/rtems_bsdnet.h> |
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| 206 | #include <rtems/error.h> |
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[07fbfced] | 207 | #include <rtems/libio.h> |
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[19ed3cf] | 208 | #include <rtems/userenv.h> |
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[3f777d0e] | 209 | #include <syslog.h> |
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| 210 | |
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| 211 | #include <sys/types.h> |
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| 212 | #include <sys/socket.h> |
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| 213 | #include <arpa/ftp.h> |
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| 214 | #include <netinet/in.h> |
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| 215 | |
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| 216 | #include "ftpd.h" |
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| 217 | |
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| 218 | |
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| 219 | #ifdef __GNUC__ |
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| 220 | /* change to #if 1 to disable syslog entirely */ |
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| 221 | #if 0 |
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| 222 | #undef syslog |
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| 223 | #define syslog(a, b, ...) while(0){} |
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| 224 | #endif |
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| 225 | #endif |
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| 226 | |
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| 227 | #define FTPD_SERVER_MESSAGE "RTEMS FTP server (Version 1.1-JWJ) ready." |
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| 228 | |
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[38371dbe] | 229 | #define FTPD_SYSTYPE "UNIX Type: L8" |
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[3f777d0e] | 230 | |
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| 231 | /* Seem to be unused */ |
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| 232 | #if 0 |
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| 233 | #define FTPD_WELCOME_MESSAGE \ |
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| 234 | "Welcome to the RTEMS FTP server.\n" \ |
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| 235 | "\n" \ |
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| 236 | "Login accepted.\n" |
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| 237 | #endif |
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| 238 | |
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| 239 | /* Event to be used by session tasks for waiting */ |
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| 240 | enum |
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| 241 | { |
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| 242 | FTPD_RTEMS_EVENT = RTEMS_EVENT_1 |
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| 243 | }; |
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| 244 | |
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| 245 | /* Configuration table */ |
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| 246 | extern struct rtems_ftpd_configuration rtems_ftpd_configuration; |
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| 247 | |
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| 248 | /* this is not prototyped in strict ansi mode */ |
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| 249 | FILE *fdopen (int fildes, const char *mode); |
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| 250 | |
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[64adc13] | 251 | /*SessionInfo structure. |
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[6d0e13c] | 252 | * |
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[3f777d0e] | 253 | * The following structure is allocated for each session. |
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| 254 | */ |
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[6d0e13c] | 255 | typedef struct |
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| 256 | { |
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[38371dbe] | 257 | struct sockaddr_in ctrl_addr; /* Control connection self address */ |
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| 258 | struct sockaddr_in data_addr; /* Data address set by PORT command */ |
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| 259 | struct sockaddr_in def_addr; /* Default address for data */ |
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| 260 | int use_default; /* 1 - use default address for data */ |
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[3f777d0e] | 261 | FILE *ctrl_fp; /* File pointer for control connection */ |
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[38371dbe] | 262 | int ctrl_socket; /* Socket for ctrl connection */ |
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| 263 | int pasv_socket; /* Socket for PASV connection */ |
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| 264 | int data_socket; /* Socket for data connection */ |
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| 265 | int idle; /* Timeout in seconds */ |
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[3f777d0e] | 266 | int xfer_mode; /* Transfer mode (ASCII/binary) */ |
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| 267 | rtems_id tid; /* Task id */ |
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[86933ce0] | 268 | char *user; /* user name (0 if not supplied) */ |
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| 269 | char *pass; /* password (0 if not supplied) */ |
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| 270 | bool auth; /* true if user/pass was valid, false if not or not supplied */ |
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[6d0e13c] | 271 | } FTPD_SessionInfo_t; |
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| 272 | |
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| 273 | |
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[3f777d0e] | 274 | /* |
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| 275 | * TaskPool structure. |
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| 276 | */ |
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| 277 | typedef struct |
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| 278 | { |
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| 279 | FTPD_SessionInfo_t *info; |
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| 280 | FTPD_SessionInfo_t **queue; |
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| 281 | int count; |
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| 282 | int head; |
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| 283 | int tail; |
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| 284 | rtems_id mutex; |
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| 285 | rtems_id sem; |
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| 286 | } FTPD_TaskPool_t; |
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| 287 | |
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| 288 | /* |
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| 289 | * Task pool instance. |
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| 290 | */ |
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| 291 | static FTPD_TaskPool_t task_pool; |
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| 292 | |
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| 293 | /* |
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[07fbfced] | 294 | * Root directory |
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[3f777d0e] | 295 | */ |
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[07fbfced] | 296 | |
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| 297 | static char const* ftpd_root = "/"; |
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[38371dbe] | 298 | |
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| 299 | /* |
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| 300 | * Default idle timeout for sockets in seconds. |
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| 301 | */ |
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| 302 | static int ftpd_timeout = 0; |
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[3f777d0e] | 303 | |
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[38371dbe] | 304 | /* |
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| 305 | * Global access flags. |
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| 306 | */ |
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| 307 | static int ftpd_access = 0; |
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[3f777d0e] | 308 | |
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[64adc13] | 309 | /* |
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[3f777d0e] | 310 | * serr |
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| 311 | * |
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[38371dbe] | 312 | * Return error string corresponding to current 'errno'. |
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[3f777d0e] | 313 | * |
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| 314 | */ |
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| 315 | static char const* |
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| 316 | serr(void) |
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| 317 | { |
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[07fbfced] | 318 | int err = errno; |
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| 319 | errno = 0; |
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| 320 | return strerror(err); |
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[3f777d0e] | 321 | } |
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| 322 | |
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[64adc13] | 323 | /* |
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[38371dbe] | 324 | * Utility routines for access control. |
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| 325 | * |
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| 326 | */ |
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[3f777d0e] | 327 | |
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[38371dbe] | 328 | static int |
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| 329 | can_read(void) |
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| 330 | { |
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| 331 | return (ftpd_access & FTPD_NO_READ) == 0; |
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| 332 | } |
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| 333 | |
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| 334 | static int |
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| 335 | can_write(void) |
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| 336 | { |
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| 337 | return (ftpd_access & FTPD_NO_WRITE) == 0; |
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| 338 | } |
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| 339 | |
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[64adc13] | 340 | /* |
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[3f777d0e] | 341 | * Task pool management routines |
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[38371dbe] | 342 | * |
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[3f777d0e] | 343 | */ |
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| 344 | |
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| 345 | |
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[64adc13] | 346 | /* |
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[3f777d0e] | 347 | * task_pool_done |
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| 348 | * |
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| 349 | * Cleanup task pool. |
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| 350 | * |
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| 351 | * Input parameters: |
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| 352 | * count - number of entries in task pool to cleanup |
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| 353 | * |
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| 354 | * Output parameters: |
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| 355 | * NONE |
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| 356 | * |
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| 357 | */ |
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| 358 | static void |
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| 359 | task_pool_done(int count) |
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| 360 | { |
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| 361 | int i; |
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| 362 | for(i = 0; i < count; ++i) |
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| 363 | rtems_task_delete(task_pool.info[i].tid); |
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| 364 | if(task_pool.info) |
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| 365 | free(task_pool.info); |
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| 366 | if(task_pool.queue) |
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| 367 | free(task_pool.queue); |
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| 368 | if(task_pool.mutex != (rtems_id)-1) |
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| 369 | rtems_semaphore_delete(task_pool.mutex); |
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| 370 | if(task_pool.sem != (rtems_id)-1) |
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| 371 | rtems_semaphore_delete(task_pool.sem); |
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| 372 | task_pool.info = 0; |
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| 373 | task_pool.queue = 0; |
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| 374 | task_pool.count = 0; |
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| 375 | task_pool.sem = -1; |
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| 376 | task_pool.mutex = -1; |
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| 377 | } |
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| 378 | |
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[64adc13] | 379 | /* |
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[3f777d0e] | 380 | * task_pool_init |
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| 381 | * |
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| 382 | * Initialize task pool. |
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| 383 | * |
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| 384 | * Input parameters: |
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| 385 | * count - number of entries in task pool to create |
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| 386 | * priority - priority tasks are started with |
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| 387 | * |
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| 388 | * Output parameters: |
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| 389 | * returns 1 on success, 0 on failure. |
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| 390 | * |
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| 391 | */ |
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[38371dbe] | 392 | static void session(rtems_task_argument arg); /* Forward declare */ |
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| 393 | |
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[3f777d0e] | 394 | static int |
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| 395 | task_pool_init(int count, rtems_task_priority priority) |
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| 396 | { |
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| 397 | int i; |
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| 398 | rtems_status_code sc; |
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| 399 | char id = 'a'; |
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| 400 | |
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| 401 | task_pool.count = 0; |
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| 402 | task_pool.head = task_pool.tail = 0; |
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| 403 | task_pool.mutex = (rtems_id)-1; |
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| 404 | task_pool.sem = (rtems_id)-1; |
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| 405 | |
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| 406 | sc = rtems_semaphore_create( |
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| 407 | rtems_build_name('F', 'T', 'P', 'M'), |
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| 408 | 1, |
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| 409 | RTEMS_DEFAULT_ATTRIBUTES |
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| 410 | | RTEMS_BINARY_SEMAPHORE |
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| 411 | | RTEMS_INHERIT_PRIORITY |
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| 412 | | RTEMS_PRIORITY, |
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| 413 | RTEMS_NO_PRIORITY, |
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| 414 | &task_pool.mutex); |
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| 415 | |
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| 416 | if(sc == RTEMS_SUCCESSFUL) |
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| 417 | sc = rtems_semaphore_create( |
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| 418 | rtems_build_name('F', 'T', 'P', 'S'), |
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| 419 | count, |
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| 420 | RTEMS_DEFAULT_ATTRIBUTES, |
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| 421 | RTEMS_NO_PRIORITY, |
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| 422 | &task_pool.sem); |
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| 423 | |
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| 424 | if(sc != RTEMS_SUCCESSFUL) { |
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| 425 | task_pool_done(0); |
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| 426 | syslog(LOG_ERR, "ftpd: Can not create semaphores"); |
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| 427 | return 0; |
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| 428 | } |
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| 429 | |
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| 430 | task_pool.info = (FTPD_SessionInfo_t*) |
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| 431 | malloc(sizeof(FTPD_SessionInfo_t) * count); |
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| 432 | task_pool.queue = (FTPD_SessionInfo_t**) |
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| 433 | malloc(sizeof(FTPD_SessionInfo_t*) * count); |
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| 434 | if (NULL == task_pool.info || NULL == task_pool.queue) |
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| 435 | { |
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| 436 | task_pool_done(0); |
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| 437 | syslog(LOG_ERR, "ftpd: Not enough memory"); |
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| 438 | return 0; |
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| 439 | } |
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| 440 | |
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| 441 | for(i = 0; i < count; ++i) |
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| 442 | { |
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| 443 | FTPD_SessionInfo_t *info = &task_pool.info[i]; |
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| 444 | sc = rtems_task_create(rtems_build_name('F', 'T', 'P', id), |
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| 445 | priority, FTPD_STACKSIZE, |
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| 446 | RTEMS_PREEMPT | RTEMS_NO_TIMESLICE | |
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| 447 | RTEMS_NO_ASR | RTEMS_INTERRUPT_LEVEL(0), |
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| 448 | RTEMS_NO_FLOATING_POINT | RTEMS_LOCAL, |
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| 449 | &info->tid); |
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| 450 | if (sc == RTEMS_SUCCESSFUL) |
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| 451 | { |
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| 452 | sc = rtems_task_start( |
---|
| 453 | info->tid, session, (rtems_task_argument)info); |
---|
| 454 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 455 | task_pool_done(i); |
---|
| 456 | } |
---|
| 457 | else |
---|
| 458 | task_pool_done(i + 1); |
---|
| 459 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 460 | { |
---|
| 461 | syslog(LOG_ERR, "ftpd: Could not create/start FTPD session: %s", |
---|
| 462 | rtems_status_text(sc)); |
---|
| 463 | return 0; |
---|
| 464 | } |
---|
| 465 | task_pool.queue[i] = task_pool.info + i; |
---|
| 466 | if (++id > 'z') |
---|
| 467 | id = 'a'; |
---|
| 468 | } |
---|
| 469 | task_pool.count = count; |
---|
| 470 | return 1; |
---|
| 471 | } |
---|
| 472 | |
---|
[64adc13] | 473 | /* |
---|
[3f777d0e] | 474 | * task_pool_obtain |
---|
| 475 | * |
---|
| 476 | * Obtain free task from task pool. |
---|
| 477 | * |
---|
| 478 | * Input parameters: |
---|
| 479 | * NONE |
---|
| 480 | * |
---|
| 481 | * Output parameters: |
---|
| 482 | * returns pointer to the corresponding SessionInfo structure on success, |
---|
| 483 | * NULL if there are no free tasks in the pool. |
---|
| 484 | * |
---|
| 485 | */ |
---|
| 486 | static FTPD_SessionInfo_t* |
---|
[5bc8a75] | 487 | task_pool_obtain(void) |
---|
[3f777d0e] | 488 | { |
---|
| 489 | FTPD_SessionInfo_t* info = 0; |
---|
| 490 | rtems_status_code sc; |
---|
| 491 | sc = rtems_semaphore_obtain(task_pool.sem, RTEMS_NO_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 492 | if (sc == RTEMS_SUCCESSFUL) |
---|
| 493 | { |
---|
| 494 | rtems_semaphore_obtain(task_pool.mutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 495 | info = task_pool.queue[task_pool.head]; |
---|
| 496 | if(++task_pool.head >= task_pool.count) |
---|
| 497 | task_pool.head = 0; |
---|
| 498 | rtems_semaphore_release(task_pool.mutex); |
---|
| 499 | } |
---|
| 500 | return info; |
---|
| 501 | } |
---|
| 502 | |
---|
[64adc13] | 503 | /* |
---|
[3f777d0e] | 504 | * task_pool_release |
---|
| 505 | * |
---|
| 506 | * Return task obtained by 'obtain()' back to the task pool. |
---|
| 507 | * |
---|
| 508 | * Input parameters: |
---|
| 509 | * info - pointer to corresponding SessionInfo structure. |
---|
| 510 | * |
---|
| 511 | * Output parameters: |
---|
| 512 | * NONE |
---|
| 513 | * |
---|
| 514 | */ |
---|
| 515 | static void |
---|
| 516 | task_pool_release(FTPD_SessionInfo_t* info) |
---|
| 517 | { |
---|
| 518 | rtems_semaphore_obtain(task_pool.mutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 519 | task_pool.queue[task_pool.tail] = info; |
---|
| 520 | if(++task_pool.tail >= task_pool.count) |
---|
| 521 | task_pool.tail = 0; |
---|
| 522 | rtems_semaphore_release(task_pool.mutex); |
---|
| 523 | rtems_semaphore_release(task_pool.sem); |
---|
| 524 | } |
---|
| 525 | |
---|
| 526 | /* |
---|
| 527 | * End of task pool routines |
---|
| 528 | */ |
---|
| 529 | |
---|
[64adc13] | 530 | /* |
---|
[38371dbe] | 531 | * Function: send_reply |
---|
| 532 | * |
---|
| 533 | * |
---|
| 534 | * This procedure sends a reply to the client via the control |
---|
| 535 | * connection. |
---|
| 536 | * |
---|
| 537 | * |
---|
| 538 | * Input parameters: |
---|
| 539 | * code - 3-digit reply code. |
---|
| 540 | * text - Reply text. |
---|
| 541 | * |
---|
| 542 | * Output parameters: |
---|
| 543 | * NONE |
---|
| 544 | */ |
---|
| 545 | static void |
---|
| 546 | send_reply(FTPD_SessionInfo_t *info, int code, char *text) |
---|
| 547 | { |
---|
[1343dfa3] | 548 | text = text != NULL ? text : ""; |
---|
| 549 | fprintf(info->ctrl_fp, "%d %.70s\r\n", code, text); |
---|
[38371dbe] | 550 | fflush(info->ctrl_fp); |
---|
| 551 | } |
---|
| 552 | |
---|
| 553 | |
---|
[64adc13] | 554 | /* |
---|
[38371dbe] | 555 | * close_socket |
---|
| 556 | * |
---|
| 557 | * Close socket. |
---|
| 558 | * |
---|
| 559 | * Input parameters: |
---|
| 560 | * s - socket descriptor. |
---|
| 561 | * seconds - number of seconds the timeout should be, |
---|
| 562 | * if >= 0 - infinite timeout (no timeout). |
---|
| 563 | * |
---|
| 564 | * Output parameters: |
---|
| 565 | * returns 1 on success, 0 on failure. |
---|
| 566 | */ |
---|
| 567 | static int |
---|
| 568 | set_socket_timeout(int s, int seconds) |
---|
| 569 | { |
---|
| 570 | int res = 0; |
---|
| 571 | struct timeval tv; |
---|
| 572 | int len = sizeof(tv); |
---|
| 573 | |
---|
| 574 | if(seconds < 0) |
---|
| 575 | seconds = 0; |
---|
| 576 | tv.tv_usec = 0; |
---|
| 577 | tv.tv_sec = seconds; |
---|
| 578 | if(0 != setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, &tv, len)) |
---|
| 579 | syslog(LOG_ERR, "ftpd: Can't set send timeout on socket: %s.", serr()); |
---|
| 580 | else if(0 != setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, len)) |
---|
| 581 | syslog(LOG_ERR, "ftpd: Can't set receive timeout on socket: %s.", serr()); |
---|
| 582 | else |
---|
| 583 | res = 1; |
---|
| 584 | return res; |
---|
| 585 | } |
---|
| 586 | |
---|
[64adc13] | 587 | /* |
---|
[3f777d0e] | 588 | * close_socket |
---|
| 589 | * |
---|
| 590 | * Close socket. |
---|
| 591 | * |
---|
| 592 | * Input parameters: |
---|
| 593 | * s - socket descriptor to be closed. |
---|
| 594 | * |
---|
| 595 | * Output parameters: |
---|
| 596 | * returns 1 on success, 0 on failure |
---|
| 597 | */ |
---|
| 598 | static int |
---|
| 599 | close_socket(int s) |
---|
| 600 | { |
---|
| 601 | if (0 <= s) |
---|
| 602 | { |
---|
| 603 | if (0 != close(s)) |
---|
| 604 | { |
---|
| 605 | shutdown(s, 2); |
---|
| 606 | if (0 != close(s)) |
---|
| 607 | return 0; |
---|
| 608 | } |
---|
| 609 | } |
---|
| 610 | return 1; |
---|
| 611 | } |
---|
| 612 | |
---|
[64adc13] | 613 | /* |
---|
[38371dbe] | 614 | * data_socket |
---|
| 615 | * |
---|
| 616 | * Create data socket for session. |
---|
| 617 | * |
---|
| 618 | * Input parameters: |
---|
| 619 | * info - corresponding SessionInfo structure |
---|
| 620 | * |
---|
| 621 | * Output parameters: |
---|
| 622 | * returns socket descriptor, or -1 if failure |
---|
| 623 | * |
---|
| 624 | */ |
---|
| 625 | static int |
---|
| 626 | data_socket(FTPD_SessionInfo_t *info) |
---|
| 627 | { |
---|
| 628 | int s = info->pasv_socket; |
---|
| 629 | if(0 > s) |
---|
| 630 | { |
---|
| 631 | int on = 1; |
---|
| 632 | s = socket(PF_INET, SOCK_STREAM, 0); |
---|
| 633 | if(0 > s) |
---|
| 634 | send_reply(info, 425, "Can't create data socket."); |
---|
| 635 | else if(0 > setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on))) |
---|
| 636 | { |
---|
| 637 | close_socket(s); |
---|
| 638 | s = -1; |
---|
| 639 | } |
---|
| 640 | else |
---|
| 641 | { |
---|
| 642 | struct sockaddr_in data_source; |
---|
| 643 | int tries; |
---|
| 644 | |
---|
| 645 | /* anchor socket to avoid multi-homing problems */ |
---|
| 646 | data_source = info->ctrl_addr; |
---|
| 647 | data_source.sin_port = htons(20); /* ftp-data port */ |
---|
| 648 | for(tries = 1; tries < 10; ++tries) |
---|
| 649 | { |
---|
[07fbfced] | 650 | errno = 0; |
---|
[38371dbe] | 651 | if(bind(s, (struct sockaddr *)&data_source, sizeof(data_source)) >= 0) |
---|
| 652 | break; |
---|
| 653 | if (errno != EADDRINUSE) |
---|
| 654 | tries = 10; |
---|
| 655 | else |
---|
| 656 | rtems_task_wake_after(tries * 10); |
---|
| 657 | } |
---|
| 658 | if(tries >= 10) |
---|
| 659 | { |
---|
| 660 | send_reply(info, 425, "Can't bind data socket."); |
---|
| 661 | close_socket(s); |
---|
| 662 | s = -1; |
---|
| 663 | } |
---|
| 664 | else |
---|
| 665 | { |
---|
| 666 | struct sockaddr_in *data_dest = |
---|
| 667 | (info->use_default) ? &info->def_addr : &info->data_addr; |
---|
| 668 | if(0 > connect(s, (struct sockaddr *)data_dest, sizeof(*data_dest))) |
---|
| 669 | { |
---|
| 670 | send_reply(info, 425, "Can't connect data socket."); |
---|
| 671 | close_socket(s); |
---|
| 672 | s = -1; |
---|
| 673 | } |
---|
| 674 | } |
---|
| 675 | } |
---|
| 676 | } |
---|
| 677 | info->data_socket = s; |
---|
| 678 | info->use_default = 1; |
---|
| 679 | if(s >= 0) |
---|
| 680 | set_socket_timeout(s, info->idle); |
---|
| 681 | return s; |
---|
| 682 | } |
---|
| 683 | |
---|
[64adc13] | 684 | /* |
---|
[38371dbe] | 685 | * close_data_socket |
---|
| 686 | * |
---|
| 687 | * Close data socket for session. |
---|
| 688 | * |
---|
| 689 | * Input parameters: |
---|
| 690 | * info - corresponding SessionInfo structure |
---|
| 691 | * |
---|
| 692 | * Output parameters: |
---|
| 693 | * NONE |
---|
| 694 | * |
---|
| 695 | */ |
---|
| 696 | static void |
---|
| 697 | close_data_socket(FTPD_SessionInfo_t *info) |
---|
| 698 | { |
---|
[07fbfced] | 699 | /* As at most one data socket could be open simultaneously and in some cases |
---|
| 700 | data_socket == pasv_socket, we select socket to close, then close it. */ |
---|
| 701 | int s = info->data_socket; |
---|
[38371dbe] | 702 | if(0 > s) |
---|
[07fbfced] | 703 | s = info->pasv_socket; |
---|
[38371dbe] | 704 | if(!close_socket(s)) |
---|
| 705 | syslog(LOG_ERR, "ftpd: Error closing data socket."); |
---|
| 706 | info->data_socket = -1; |
---|
| 707 | info->pasv_socket = -1; |
---|
| 708 | info->use_default = 1; |
---|
| 709 | } |
---|
| 710 | |
---|
[64adc13] | 711 | /* |
---|
[3f777d0e] | 712 | * close_stream |
---|
| 713 | * |
---|
[38371dbe] | 714 | * Close control stream of session. |
---|
[3f777d0e] | 715 | * |
---|
| 716 | * Input parameters: |
---|
| 717 | * info - corresponding SessionInfo structure |
---|
| 718 | * |
---|
| 719 | * Output parameters: |
---|
| 720 | * NONE |
---|
| 721 | * |
---|
| 722 | */ |
---|
| 723 | static void |
---|
| 724 | close_stream(FTPD_SessionInfo_t* info) |
---|
| 725 | { |
---|
| 726 | if (NULL != info->ctrl_fp) |
---|
| 727 | { |
---|
| 728 | if (0 != fclose(info->ctrl_fp)) |
---|
| 729 | { |
---|
| 730 | syslog(LOG_ERR, "ftpd: Could not close control stream: %s", serr()); |
---|
| 731 | } |
---|
| 732 | else |
---|
[38371dbe] | 733 | info->ctrl_socket = -1; |
---|
[3f777d0e] | 734 | } |
---|
| 735 | |
---|
[38371dbe] | 736 | if (!close_socket(info->ctrl_socket)) |
---|
[3f777d0e] | 737 | syslog(LOG_ERR, "ftpd: Could not close control socket: %s", serr()); |
---|
| 738 | |
---|
| 739 | info->ctrl_fp = NULL; |
---|
[38371dbe] | 740 | info->ctrl_socket = -1; |
---|
[3f777d0e] | 741 | } |
---|
[6d0e13c] | 742 | |
---|
| 743 | |
---|
[64adc13] | 744 | /* |
---|
[3f777d0e] | 745 | * send_mode_reply |
---|
| 746 | * |
---|
| 747 | * Sends BINARY/ASCII reply string depending on current transfer mode. |
---|
| 748 | * |
---|
| 749 | * Input parameters: |
---|
| 750 | * info - corresponding SessionInfo structure |
---|
| 751 | * |
---|
| 752 | * Output parameters: |
---|
| 753 | * NONE |
---|
| 754 | * |
---|
| 755 | */ |
---|
| 756 | static void |
---|
| 757 | send_mode_reply(FTPD_SessionInfo_t *info) |
---|
| 758 | { |
---|
| 759 | if(info->xfer_mode == TYPE_I) |
---|
| 760 | send_reply(info, 150, "Opening BINARY mode data connection."); |
---|
| 761 | else |
---|
| 762 | send_reply(info, 150, "Opening ASCII mode data connection."); |
---|
[6d0e13c] | 763 | } |
---|
| 764 | |
---|
[64adc13] | 765 | /* |
---|
[38371dbe] | 766 | * command_retrieve |
---|
[3f777d0e] | 767 | * |
---|
[38371dbe] | 768 | * Perform the "RETR" command (send file to client). |
---|
[3f777d0e] | 769 | * |
---|
| 770 | * Input parameters: |
---|
| 771 | * info - corresponding SessionInfo structure |
---|
[38371dbe] | 772 | * char *filename - source filename. |
---|
[3f777d0e] | 773 | * |
---|
| 774 | * Output parameters: |
---|
[38371dbe] | 775 | * NONE |
---|
[3f777d0e] | 776 | * |
---|
| 777 | */ |
---|
[38371dbe] | 778 | static void |
---|
| 779 | command_retrieve(FTPD_SessionInfo_t *info, char const *filename) |
---|
[6d0e13c] | 780 | { |
---|
[3f777d0e] | 781 | int s = -1; |
---|
| 782 | int fd = -1; |
---|
| 783 | char buf[FTPD_DATASIZE]; |
---|
[e7fd0524] | 784 | struct stat stat_buf; |
---|
[3f777d0e] | 785 | int res = 0; |
---|
[38371dbe] | 786 | |
---|
[86933ce0] | 787 | if(!can_read() || !info->auth) |
---|
[38371dbe] | 788 | { |
---|
| 789 | send_reply(info, 550, "Access denied."); |
---|
| 790 | return; |
---|
| 791 | } |
---|
[3f777d0e] | 792 | |
---|
[07fbfced] | 793 | if (0 > (fd = open(filename, O_RDONLY))) |
---|
[3f777d0e] | 794 | { |
---|
[38371dbe] | 795 | send_reply(info, 550, "Error opening file."); |
---|
| 796 | return; |
---|
[3f777d0e] | 797 | } |
---|
| 798 | |
---|
[e7fd0524] | 799 | if (fstat(fd, &stat_buf) == 0 && S_ISDIR(stat_buf.st_mode)) |
---|
| 800 | { |
---|
| 801 | if (-1 != fd) |
---|
| 802 | close(fd); |
---|
| 803 | send_reply(info, 550, "Is a directory."); |
---|
| 804 | return; |
---|
| 805 | } |
---|
| 806 | |
---|
[3f777d0e] | 807 | send_mode_reply(info); |
---|
| 808 | |
---|
| 809 | s = data_socket(info); |
---|
[38371dbe] | 810 | |
---|
[3f777d0e] | 811 | if (0 <= s) |
---|
| 812 | { |
---|
[38371dbe] | 813 | int n = -1; |
---|
| 814 | |
---|
| 815 | if(info->xfer_mode == TYPE_I) |
---|
| 816 | { |
---|
| 817 | while ((n = read(fd, buf, FTPD_DATASIZE)) > 0) |
---|
| 818 | { |
---|
| 819 | if(send(s, buf, n, 0) != n) |
---|
| 820 | break; |
---|
| 821 | } |
---|
| 822 | } |
---|
| 823 | else if (info->xfer_mode == TYPE_A) |
---|
[3f777d0e] | 824 | { |
---|
[38371dbe] | 825 | int rest = 0; |
---|
| 826 | while (rest == 0 && (n = read(fd, buf, FTPD_DATASIZE)) > 0) |
---|
| 827 | { |
---|
| 828 | char const* e = buf; |
---|
| 829 | char const* b; |
---|
| 830 | int i; |
---|
| 831 | rest = n; |
---|
| 832 | do |
---|
| 833 | { |
---|
| 834 | char lf = '\0'; |
---|
| 835 | |
---|
| 836 | b = e; |
---|
| 837 | for(i = 0; i < rest; ++i, ++e) |
---|
| 838 | { |
---|
| 839 | if(*e == '\n') |
---|
| 840 | { |
---|
| 841 | lf = '\n'; |
---|
| 842 | break; |
---|
| 843 | } |
---|
| 844 | } |
---|
| 845 | if(send(s, b, i, 0) != i) |
---|
| 846 | break; |
---|
| 847 | if(lf == '\n') |
---|
| 848 | { |
---|
| 849 | if(send(s, "\r\n", 2, 0) != 2) |
---|
| 850 | break; |
---|
| 851 | ++e; |
---|
| 852 | ++i; |
---|
| 853 | } |
---|
| 854 | } |
---|
| 855 | while((rest -= i) > 0); |
---|
| 856 | } |
---|
[3f777d0e] | 857 | } |
---|
| 858 | |
---|
| 859 | if (0 == n) |
---|
| 860 | { |
---|
| 861 | if (0 == close(fd)) |
---|
| 862 | { |
---|
| 863 | fd = -1; |
---|
| 864 | res = 1; |
---|
| 865 | } |
---|
| 866 | } |
---|
| 867 | } |
---|
[6d0e13c] | 868 | |
---|
[3f777d0e] | 869 | if (-1 != fd) |
---|
| 870 | close(fd); |
---|
[6d0e13c] | 871 | |
---|
[38371dbe] | 872 | if (0 == res) |
---|
| 873 | send_reply(info, 451, "File read error."); |
---|
| 874 | else |
---|
| 875 | send_reply(info, 226, "Transfer complete."); |
---|
| 876 | |
---|
| 877 | close_data_socket(info); |
---|
[6d0e13c] | 878 | |
---|
[38371dbe] | 879 | return; |
---|
[6d0e13c] | 880 | } |
---|
| 881 | |
---|
| 882 | |
---|
[64adc13] | 883 | /* |
---|
[07fbfced] | 884 | * discard |
---|
| 885 | * |
---|
| 886 | * Analog of `write' routine that just discards passed data |
---|
| 887 | * |
---|
| 888 | * Input parameters: |
---|
| 889 | * fd - file descriptor (ignored) |
---|
| 890 | * buf - data to write (ignored) |
---|
| 891 | * count - number of bytes in `buf' |
---|
| 892 | * |
---|
| 893 | * Output parameters: |
---|
| 894 | * returns `count' |
---|
| 895 | * |
---|
| 896 | */ |
---|
| 897 | static ssize_t |
---|
| 898 | discard(int fd, void const* buf, size_t count) |
---|
| 899 | { |
---|
| 900 | (void)fd; |
---|
| 901 | (void)buf; |
---|
| 902 | return count; |
---|
| 903 | } |
---|
| 904 | |
---|
[64adc13] | 905 | /* |
---|
[38371dbe] | 906 | * command_store |
---|
| 907 | * |
---|
| 908 | * Performs the "STOR" command (receive data from client). |
---|
| 909 | * |
---|
| 910 | * Input parameters: |
---|
| 911 | * info - corresponding SessionInfo structure |
---|
| 912 | * char *filename - Destination filename. |
---|
| 913 | * |
---|
| 914 | * Output parameters: |
---|
| 915 | * NONE |
---|
| 916 | */ |
---|
| 917 | static void |
---|
| 918 | command_store(FTPD_SessionInfo_t *info, char const *filename) |
---|
[6d0e13c] | 919 | { |
---|
[3f777d0e] | 920 | int s; |
---|
| 921 | int n; |
---|
| 922 | unsigned long size = 0; |
---|
| 923 | struct rtems_ftpd_hook *usehook = NULL; |
---|
| 924 | char buf[FTPD_DATASIZE]; |
---|
[38371dbe] | 925 | int res = 1; |
---|
| 926 | int bare_lfs = 0; |
---|
[07fbfced] | 927 | int null = 0; |
---|
| 928 | typedef ssize_t (*WriteProc)(int, void const*, size_t); |
---|
| 929 | WriteProc wrt = &write; |
---|
[3f777d0e] | 930 | |
---|
[86933ce0] | 931 | if(!can_write() || !info->auth) |
---|
[38371dbe] | 932 | { |
---|
| 933 | send_reply(info, 550, "Access denied."); |
---|
| 934 | return; |
---|
| 935 | } |
---|
| 936 | |
---|
[3f777d0e] | 937 | send_mode_reply(info); |
---|
| 938 | |
---|
| 939 | s = data_socket(info); |
---|
| 940 | if(0 > s) |
---|
[38371dbe] | 941 | return; |
---|
[3f777d0e] | 942 | |
---|
[07fbfced] | 943 | null = !strcmp("/dev/null", filename); |
---|
[3f777d0e] | 944 | if (null) |
---|
| 945 | { |
---|
[38371dbe] | 946 | /* File "/dev/null" just throws data away. |
---|
[07fbfced] | 947 | * FIXME: this is hack. Using `/dev/null' filesystem entry would be |
---|
| 948 | * better. |
---|
[38371dbe] | 949 | */ |
---|
[07fbfced] | 950 | wrt = &discard; |
---|
[3f777d0e] | 951 | } |
---|
[07fbfced] | 952 | |
---|
| 953 | if (!null && rtems_ftpd_configuration.hooks != NULL) |
---|
[3f777d0e] | 954 | { |
---|
[38371dbe] | 955 | |
---|
| 956 | /* Search our list of hooks to see if we need to do something special. */ |
---|
[3f777d0e] | 957 | struct rtems_ftpd_hook *hook; |
---|
| 958 | int i; |
---|
| 959 | |
---|
| 960 | i = 0; |
---|
| 961 | hook = &rtems_ftpd_configuration.hooks[i++]; |
---|
| 962 | while (hook->filename != NULL) |
---|
| 963 | { |
---|
[a8c33268] | 964 | if (!strcmp(hook->filename, filename)) |
---|
[85e24a3] | 965 | { |
---|
[3f777d0e] | 966 | usehook = hook; |
---|
| 967 | break; |
---|
[85e24a3] | 968 | } |
---|
[3f777d0e] | 969 | hook = &rtems_ftpd_configuration.hooks[i++]; |
---|
| 970 | } |
---|
| 971 | } |
---|
| 972 | |
---|
| 973 | if (usehook != NULL) |
---|
| 974 | { |
---|
| 975 | /* |
---|
| 976 | * OSV: FIXME: Small buffer could be used and hook routine |
---|
[38371dbe] | 977 | * called multiple times instead. Alternatively, the support could be |
---|
[3f777d0e] | 978 | * removed entirely in favor of configuring RTEMS pseudo-device with |
---|
| 979 | * given name. |
---|
| 980 | */ |
---|
| 981 | |
---|
| 982 | char *bigBufr; |
---|
| 983 | size_t filesize = rtems_ftpd_configuration.max_hook_filesize + 1; |
---|
| 984 | |
---|
[38371dbe] | 985 | /* |
---|
[3f777d0e] | 986 | * Allocate space for our "file". |
---|
[38371dbe] | 987 | */ |
---|
[3f777d0e] | 988 | bigBufr = (char *)malloc(filesize); |
---|
| 989 | if (bigBufr == NULL) |
---|
| 990 | { |
---|
[38371dbe] | 991 | send_reply(info, 451, "Local resource failure: malloc."); |
---|
| 992 | close_data_socket(info); |
---|
| 993 | return; |
---|
[3f777d0e] | 994 | } |
---|
| 995 | |
---|
[38371dbe] | 996 | /* |
---|
[3f777d0e] | 997 | * Retrieve the file into our buffer space. |
---|
[38371dbe] | 998 | */ |
---|
[3f777d0e] | 999 | size = 0; |
---|
[38371dbe] | 1000 | while ((n = recv(s, bigBufr + size, filesize - size, 0)) > 0) |
---|
[3f777d0e] | 1001 | { |
---|
| 1002 | size += n; |
---|
| 1003 | } |
---|
| 1004 | if (size >= filesize) |
---|
| 1005 | { |
---|
[38371dbe] | 1006 | send_reply(info, 451, "File too long: buffer size exceeded."); |
---|
[3f777d0e] | 1007 | free(bigBufr); |
---|
[38371dbe] | 1008 | close_data_socket(info); |
---|
| 1009 | return; |
---|
[3f777d0e] | 1010 | } |
---|
| 1011 | |
---|
[38371dbe] | 1012 | /* |
---|
[3f777d0e] | 1013 | * Call our hook. |
---|
[38371dbe] | 1014 | */ |
---|
| 1015 | res = (usehook->hook_function)(bigBufr, size) == 0; |
---|
| 1016 | free(bigBufr); |
---|
| 1017 | if(!res) |
---|
[3f777d0e] | 1018 | { |
---|
[38371dbe] | 1019 | send_reply(info, 451, "File processing failed."); |
---|
| 1020 | close_data_socket(info); |
---|
| 1021 | return; |
---|
[3f777d0e] | 1022 | } |
---|
| 1023 | } |
---|
| 1024 | else |
---|
| 1025 | { |
---|
[07fbfced] | 1026 | /* Data transfer to regular file or /dev/null. */ |
---|
| 1027 | int fd = 0; |
---|
| 1028 | |
---|
| 1029 | if(!null) |
---|
| 1030 | fd = creat(filename, |
---|
| 1031 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
---|
[3f777d0e] | 1032 | |
---|
| 1033 | if (0 > fd) |
---|
| 1034 | { |
---|
[38371dbe] | 1035 | send_reply(info, 550, "Error creating file."); |
---|
| 1036 | close_data_socket(info); |
---|
| 1037 | return; |
---|
[3f777d0e] | 1038 | } |
---|
[85e24a3] | 1039 | |
---|
[38371dbe] | 1040 | if(info->xfer_mode == TYPE_I) |
---|
[3f777d0e] | 1041 | { |
---|
[38371dbe] | 1042 | while ((n = recv(s, buf, FTPD_DATASIZE, 0)) > 0) |
---|
[6d0e13c] | 1043 | { |
---|
[07fbfced] | 1044 | if (wrt(fd, buf, n) != n) |
---|
[38371dbe] | 1045 | { |
---|
| 1046 | res = 0; |
---|
| 1047 | break; |
---|
| 1048 | } |
---|
[6d0e13c] | 1049 | } |
---|
[3f777d0e] | 1050 | } |
---|
[38371dbe] | 1051 | else if(info->xfer_mode == TYPE_A) |
---|
[3f777d0e] | 1052 | { |
---|
[38371dbe] | 1053 | int rest = 0; |
---|
| 1054 | int pended_cr = 0; |
---|
| 1055 | while (res && rest == 0 && (n = recv(s, buf, FTPD_DATASIZE, 0)) > 0) |
---|
| 1056 | { |
---|
| 1057 | char const* e = buf; |
---|
| 1058 | char const* b; |
---|
| 1059 | int i; |
---|
| 1060 | |
---|
| 1061 | rest = n; |
---|
| 1062 | if(pended_cr && *e != '\n') |
---|
| 1063 | { |
---|
| 1064 | char const lf = '\r'; |
---|
| 1065 | pended_cr = 0; |
---|
[07fbfced] | 1066 | if(wrt(fd, &lf, 1) != 1) |
---|
[38371dbe] | 1067 | { |
---|
| 1068 | res = 0; |
---|
| 1069 | break; |
---|
| 1070 | } |
---|
| 1071 | } |
---|
| 1072 | do |
---|
| 1073 | { |
---|
| 1074 | int count; |
---|
| 1075 | int sub = 0; |
---|
| 1076 | |
---|
| 1077 | b = e; |
---|
| 1078 | for(i = 0; i < rest; ++i, ++e) |
---|
| 1079 | { |
---|
| 1080 | int pcr = pended_cr; |
---|
| 1081 | pended_cr = 0; |
---|
| 1082 | if(*e == '\r') |
---|
| 1083 | { |
---|
| 1084 | pended_cr = 1; |
---|
| 1085 | } |
---|
| 1086 | else if(*e == '\n') |
---|
| 1087 | { |
---|
| 1088 | if(pcr) |
---|
| 1089 | { |
---|
| 1090 | sub = 2; |
---|
| 1091 | ++i; |
---|
| 1092 | ++e; |
---|
| 1093 | break; |
---|
| 1094 | } |
---|
| 1095 | ++bare_lfs; |
---|
| 1096 | } |
---|
| 1097 | } |
---|
| 1098 | if(res == 0) |
---|
| 1099 | break; |
---|
| 1100 | count = i - sub - pended_cr; |
---|
[07fbfced] | 1101 | if(count > 0 && wrt(fd, b, count) != count) |
---|
[38371dbe] | 1102 | { |
---|
| 1103 | res = 0; |
---|
| 1104 | break; |
---|
| 1105 | } |
---|
[07fbfced] | 1106 | if(sub == 2 && wrt(fd, e - 1, 1) != 1) |
---|
[38371dbe] | 1107 | res = 0; |
---|
| 1108 | } |
---|
| 1109 | while((rest -= i) > 0); |
---|
| 1110 | } |
---|
| 1111 | } |
---|
| 1112 | |
---|
| 1113 | if (0 > close(fd) || res == 0) |
---|
| 1114 | { |
---|
| 1115 | send_reply(info, 452, "Error writing file."); |
---|
| 1116 | close_data_socket(info); |
---|
| 1117 | return; |
---|
[3f777d0e] | 1118 | } |
---|
| 1119 | } |
---|
| 1120 | |
---|
[38371dbe] | 1121 | if (bare_lfs > 0) |
---|
| 1122 | { |
---|
| 1123 | snprintf(buf, FTPD_BUFSIZE, |
---|
| 1124 | "Transfer complete. WARNING! %d bare linefeeds received in ASCII mode.", |
---|
| 1125 | bare_lfs); |
---|
| 1126 | send_reply(info, 226, buf); |
---|
| 1127 | } |
---|
| 1128 | else |
---|
| 1129 | send_reply(info, 226, "Transfer complete."); |
---|
| 1130 | close_data_socket(info); |
---|
| 1131 | |
---|
[3f777d0e] | 1132 | } |
---|
[6d0e13c] | 1133 | |
---|
[3f777d0e] | 1134 | |
---|
[64adc13] | 1135 | /* |
---|
[3f777d0e] | 1136 | * send_dirline |
---|
| 1137 | * |
---|
| 1138 | * Sends one line of LIST command reply corresponding to single file. |
---|
| 1139 | * |
---|
| 1140 | * Input parameters: |
---|
| 1141 | * s - socket descriptor to send data to |
---|
[38371dbe] | 1142 | * wide - if 0, send only file name. If not 0, send 'stat' info as well in |
---|
[3f777d0e] | 1143 | * "ls -l" format. |
---|
| 1144 | * curTime - current time |
---|
| 1145 | * path - path to be prepended to what is given by 'add' |
---|
| 1146 | * add - path to be appended to what is given by 'path', the resulting path |
---|
| 1147 | * is then passed to 'stat()' routine |
---|
| 1148 | * name - file name to be reported in output |
---|
| 1149 | * buf - buffer for temporary data |
---|
| 1150 | * |
---|
| 1151 | * Output parameters: |
---|
[38371dbe] | 1152 | * returns 0 on failure, 1 on success |
---|
[3f777d0e] | 1153 | * |
---|
| 1154 | */ |
---|
[38371dbe] | 1155 | static int |
---|
[3f777d0e] | 1156 | send_dirline(int s, int wide, time_t curTime, char const* path, |
---|
| 1157 | char const* add, char const* fname, char* buf) |
---|
| 1158 | { |
---|
| 1159 | if(wide) |
---|
| 1160 | { |
---|
| 1161 | struct stat stat_buf; |
---|
| 1162 | |
---|
| 1163 | int plen = strlen(path); |
---|
| 1164 | int alen = strlen(add); |
---|
| 1165 | if(plen == 0) |
---|
| 1166 | { |
---|
| 1167 | buf[plen++] = '/'; |
---|
| 1168 | buf[plen] = '\0'; |
---|
| 1169 | } |
---|
| 1170 | else |
---|
| 1171 | { |
---|
| 1172 | strcpy(buf, path); |
---|
| 1173 | if(alen > 0 && buf[plen - 1] != '/') |
---|
[85e24a3] | 1174 | { |
---|
[3f777d0e] | 1175 | buf[plen++] = '/'; |
---|
| 1176 | if(plen >= FTPD_BUFSIZE) |
---|
[38371dbe] | 1177 | return 0; |
---|
[3f777d0e] | 1178 | buf[plen] = '\0'; |
---|
[85e24a3] | 1179 | } |
---|
[3f777d0e] | 1180 | } |
---|
| 1181 | if(plen + alen >= FTPD_BUFSIZE) |
---|
[38371dbe] | 1182 | return 0; |
---|
[3f777d0e] | 1183 | strcpy(buf + plen, add); |
---|
| 1184 | |
---|
| 1185 | if (stat(buf, &stat_buf) == 0) |
---|
| 1186 | { |
---|
| 1187 | int len; |
---|
| 1188 | struct tm bt; |
---|
| 1189 | time_t tf = stat_buf.st_mtime; |
---|
| 1190 | enum { SIZE = 80 }; |
---|
[dc936a4] | 1191 | time_t SIX_MONTHS = (365L*24L*60L*60L)/2L; |
---|
[3f777d0e] | 1192 | char timeBuf[SIZE]; |
---|
| 1193 | gmtime_r(&tf, &bt); |
---|
| 1194 | if(curTime > tf + SIX_MONTHS || tf > curTime + SIX_MONTHS) |
---|
| 1195 | strftime (timeBuf, SIZE, "%b %d %Y", &bt); |
---|
[85e24a3] | 1196 | else |
---|
[3f777d0e] | 1197 | strftime (timeBuf, SIZE, "%b %d %H:%M", &bt); |
---|
| 1198 | |
---|
| 1199 | len = snprintf(buf, FTPD_BUFSIZE, |
---|
| 1200 | "%c%c%c%c%c%c%c%c%c%c 1 %5d %5d %11u %s %s\r\n", |
---|
| 1201 | (S_ISLNK(stat_buf.st_mode)?('l'): |
---|
| 1202 | (S_ISDIR(stat_buf.st_mode)?('d'):('-'))), |
---|
| 1203 | (stat_buf.st_mode & S_IRUSR)?('r'):('-'), |
---|
| 1204 | (stat_buf.st_mode & S_IWUSR)?('w'):('-'), |
---|
| 1205 | (stat_buf.st_mode & S_IXUSR)?('x'):('-'), |
---|
| 1206 | (stat_buf.st_mode & S_IRGRP)?('r'):('-'), |
---|
| 1207 | (stat_buf.st_mode & S_IWGRP)?('w'):('-'), |
---|
| 1208 | (stat_buf.st_mode & S_IXGRP)?('x'):('-'), |
---|
| 1209 | (stat_buf.st_mode & S_IROTH)?('r'):('-'), |
---|
| 1210 | (stat_buf.st_mode & S_IWOTH)?('w'):('-'), |
---|
| 1211 | (stat_buf.st_mode & S_IXOTH)?('x'):('-'), |
---|
| 1212 | (int)stat_buf.st_uid, |
---|
| 1213 | (int)stat_buf.st_gid, |
---|
| 1214 | (int)stat_buf.st_size, |
---|
| 1215 | timeBuf, |
---|
| 1216 | fname |
---|
| 1217 | ); |
---|
| 1218 | |
---|
[38371dbe] | 1219 | if(send(s, buf, len, 0) != len) |
---|
| 1220 | return 0; |
---|
[3f777d0e] | 1221 | } |
---|
| 1222 | } |
---|
| 1223 | else |
---|
| 1224 | { |
---|
| 1225 | int len = snprintf(buf, FTPD_BUFSIZE, "%s\r\n", fname); |
---|
[38371dbe] | 1226 | if(send(s, buf, len, 0) != len) |
---|
| 1227 | return 0; |
---|
[3f777d0e] | 1228 | } |
---|
[38371dbe] | 1229 | return 1; |
---|
[6d0e13c] | 1230 | } |
---|
| 1231 | |
---|
[64adc13] | 1232 | /* |
---|
[38371dbe] | 1233 | * command_list |
---|
| 1234 | * |
---|
| 1235 | * Send file list to client. |
---|
| 1236 | * |
---|
| 1237 | * Input parameters: |
---|
| 1238 | * info - corresponding SessionInfo structure |
---|
| 1239 | * char *fname - File (or directory) to list. |
---|
| 1240 | * |
---|
| 1241 | * Output parameters: |
---|
| 1242 | * NONE |
---|
| 1243 | */ |
---|
[6d0e13c] | 1244 | static void |
---|
[3f777d0e] | 1245 | command_list(FTPD_SessionInfo_t *info, char const *fname, int wide) |
---|
[6d0e13c] | 1246 | { |
---|
[3f777d0e] | 1247 | int s; |
---|
| 1248 | DIR *dirp = 0; |
---|
| 1249 | struct dirent *dp = 0; |
---|
| 1250 | struct stat stat_buf; |
---|
| 1251 | char buf[FTPD_BUFSIZE]; |
---|
| 1252 | time_t curTime; |
---|
[38371dbe] | 1253 | int sc = 1; |
---|
[3f777d0e] | 1254 | |
---|
[86933ce0] | 1255 | if(!info->auth) |
---|
| 1256 | { |
---|
| 1257 | send_reply(info, 550, "Access denied."); |
---|
| 1258 | return; |
---|
| 1259 | } |
---|
| 1260 | |
---|
[3f777d0e] | 1261 | send_reply(info, 150, "Opening ASCII mode data connection for LIST."); |
---|
| 1262 | |
---|
| 1263 | s = data_socket(info); |
---|
| 1264 | if(0 > s) |
---|
| 1265 | { |
---|
| 1266 | syslog(LOG_ERR, "ftpd: Error connecting to data socket."); |
---|
| 1267 | return; |
---|
| 1268 | } |
---|
| 1269 | |
---|
| 1270 | if(fname[0] == '\0') |
---|
| 1271 | fname = "."; |
---|
| 1272 | |
---|
[07fbfced] | 1273 | if (0 > stat(fname, &stat_buf)) |
---|
[3f777d0e] | 1274 | { |
---|
| 1275 | snprintf(buf, FTPD_BUFSIZE, |
---|
| 1276 | "%s: No such file or directory.\r\n", fname); |
---|
| 1277 | send(s, buf, strlen(buf), 0); |
---|
| 1278 | } |
---|
[07fbfced] | 1279 | else if (S_ISDIR(stat_buf.st_mode) && (NULL == (dirp = opendir(fname)))) |
---|
[3f777d0e] | 1280 | { |
---|
| 1281 | snprintf(buf, FTPD_BUFSIZE, |
---|
| 1282 | "%s: Can not open directory.\r\n", fname); |
---|
| 1283 | send(s, buf, strlen(buf), 0); |
---|
| 1284 | } |
---|
| 1285 | else |
---|
| 1286 | { |
---|
| 1287 | time(&curTime); |
---|
[38371dbe] | 1288 | if(!dirp && *fname) |
---|
[07fbfced] | 1289 | sc = sc && send_dirline(s, wide, curTime, fname, "", fname, buf); |
---|
[3f777d0e] | 1290 | else { |
---|
| 1291 | /* FIXME: need "." and ".." only when '-a' option is given */ |
---|
[07fbfced] | 1292 | sc = sc && send_dirline(s, wide, curTime, fname, "", ".", buf); |
---|
| 1293 | sc = sc && send_dirline(s, wide, curTime, fname, |
---|
| 1294 | (strcmp(fname, ftpd_root) ? ".." : ""), "..", buf); |
---|
[38371dbe] | 1295 | while (sc && (dp = readdir(dirp)) != NULL) |
---|
| 1296 | sc = sc && |
---|
[07fbfced] | 1297 | send_dirline(s, wide, curTime, fname, dp->d_name, dp->d_name, buf); |
---|
[3f777d0e] | 1298 | } |
---|
| 1299 | } |
---|
| 1300 | |
---|
| 1301 | if(dirp) |
---|
| 1302 | closedir(dirp); |
---|
[38371dbe] | 1303 | close_data_socket(info); |
---|
| 1304 | |
---|
| 1305 | if(sc) |
---|
| 1306 | send_reply(info, 226, "Transfer complete."); |
---|
| 1307 | else |
---|
| 1308 | send_reply(info, 426, "Connection aborted."); |
---|
[6d0e13c] | 1309 | } |
---|
| 1310 | |
---|
| 1311 | |
---|
[64adc13] | 1312 | /* |
---|
[07fbfced] | 1313 | * command_cwd |
---|
[3f777d0e] | 1314 | * |
---|
[07fbfced] | 1315 | * Change current working directory. |
---|
[3f777d0e] | 1316 | * |
---|
| 1317 | * Input parameters: |
---|
| 1318 | * info - corresponding SessionInfo structure |
---|
| 1319 | * dir - directory name passed in CWD command |
---|
| 1320 | * |
---|
| 1321 | * Output parameters: |
---|
[07fbfced] | 1322 | * NONE |
---|
[3f777d0e] | 1323 | * |
---|
[6d0e13c] | 1324 | */ |
---|
| 1325 | static void |
---|
[07fbfced] | 1326 | command_cwd(FTPD_SessionInfo_t *info, char *dir) |
---|
[6d0e13c] | 1327 | { |
---|
[86933ce0] | 1328 | if(!info->auth) |
---|
| 1329 | { |
---|
| 1330 | send_reply(info, 550, "Access denied."); |
---|
| 1331 | return; |
---|
| 1332 | } |
---|
| 1333 | |
---|
[07fbfced] | 1334 | if(chdir(dir) == 0) |
---|
[3f777d0e] | 1335 | send_reply(info, 250, "CWD command successful."); |
---|
| 1336 | else |
---|
| 1337 | send_reply(info, 550, "CWD command failed."); |
---|
| 1338 | } |
---|
[6d0e13c] | 1339 | |
---|
| 1340 | |
---|
[64adc13] | 1341 | /* |
---|
[07fbfced] | 1342 | * command_pwd |
---|
| 1343 | * |
---|
| 1344 | * Send current working directory to client. |
---|
| 1345 | * |
---|
| 1346 | * Input parameters: |
---|
| 1347 | * info - corresponding SessionInfo structure |
---|
| 1348 | * |
---|
| 1349 | * Output parameters: |
---|
| 1350 | * NONE |
---|
| 1351 | */ |
---|
| 1352 | static void |
---|
| 1353 | command_pwd(FTPD_SessionInfo_t *info) |
---|
| 1354 | { |
---|
| 1355 | char buf[FTPD_BUFSIZE]; |
---|
| 1356 | char const* cwd; |
---|
| 1357 | errno = 0; |
---|
| 1358 | buf[0] = '"'; |
---|
[86933ce0] | 1359 | |
---|
| 1360 | if(!info->auth) |
---|
| 1361 | { |
---|
| 1362 | send_reply(info, 550, "Access denied."); |
---|
| 1363 | return; |
---|
| 1364 | } |
---|
| 1365 | |
---|
[07fbfced] | 1366 | cwd = getcwd(buf + 1, FTPD_BUFSIZE - 4); |
---|
| 1367 | if(cwd) |
---|
| 1368 | { |
---|
| 1369 | int len = strlen(cwd); |
---|
| 1370 | static char const txt[] = "\" is the current directory."; |
---|
| 1371 | int size = sizeof(txt); |
---|
| 1372 | if(len + size + 1 >= FTPD_BUFSIZE) |
---|
| 1373 | size = FTPD_BUFSIZE - len - 2; |
---|
| 1374 | memcpy(buf + len + 1, txt, size); |
---|
| 1375 | buf[len + size] = '\0'; |
---|
| 1376 | send_reply(info, 250, buf); |
---|
| 1377 | } |
---|
| 1378 | else { |
---|
| 1379 | snprintf(buf, FTPD_BUFSIZE, "Error: %s.", serr()); |
---|
| 1380 | send_reply(info, 452, buf); |
---|
| 1381 | } |
---|
| 1382 | } |
---|
[6d0e13c] | 1383 | |
---|
[64adc13] | 1384 | /* |
---|
[3f777d0e] | 1385 | * command_mdtm |
---|
| 1386 | * |
---|
[38371dbe] | 1387 | * Handle FTP MDTM command (send file modification time to client)/ |
---|
[3f777d0e] | 1388 | * |
---|
| 1389 | * Input parameters: |
---|
| 1390 | * info - corresponding SessionInfo structure |
---|
| 1391 | * fname - file name passed in MDTM command |
---|
| 1392 | * |
---|
| 1393 | * Output parameters: |
---|
| 1394 | * info->cwd is set to new CWD value. |
---|
| 1395 | */ |
---|
| 1396 | static void |
---|
| 1397 | command_mdtm(FTPD_SessionInfo_t *info, char const* fname) |
---|
| 1398 | { |
---|
| 1399 | struct stat stbuf; |
---|
| 1400 | char buf[FTPD_BUFSIZE]; |
---|
| 1401 | |
---|
[86933ce0] | 1402 | if(!info->auth) |
---|
| 1403 | { |
---|
| 1404 | send_reply(info, 550, "Access denied."); |
---|
| 1405 | return; |
---|
| 1406 | } |
---|
| 1407 | |
---|
[07fbfced] | 1408 | if (0 > stat(fname, &stbuf)) |
---|
[3f777d0e] | 1409 | { |
---|
| 1410 | snprintf(buf, FTPD_BUFSIZE, "%s: %s.", fname, serr()); |
---|
| 1411 | send_reply(info, 550, buf); |
---|
| 1412 | } |
---|
| 1413 | else |
---|
| 1414 | { |
---|
| 1415 | struct tm *t = gmtime(&stbuf.st_mtime); |
---|
| 1416 | snprintf(buf, FTPD_BUFSIZE, "%04d%02d%02d%02d%02d%02d", |
---|
| 1417 | 1900 + t->tm_year, |
---|
| 1418 | t->tm_mon+1, t->tm_mday, |
---|
| 1419 | t->tm_hour, t->tm_min, t->tm_sec); |
---|
| 1420 | send_reply(info, 213, buf); |
---|
| 1421 | } |
---|
[6d0e13c] | 1422 | } |
---|
| 1423 | |
---|
[64adc13] | 1424 | /* |
---|
[38371dbe] | 1425 | * command_port |
---|
| 1426 | * |
---|
| 1427 | * This procedure fills address for data connection given the IP address and |
---|
| 1428 | * port of the remote machine. |
---|
| 1429 | * |
---|
| 1430 | * Input parameters: |
---|
| 1431 | * info - corresponding SessionInfo structure |
---|
| 1432 | * args - arguments to the "PORT" command. |
---|
| 1433 | * |
---|
| 1434 | * Output parameters: |
---|
| 1435 | * info->data_addr is set according to arguments of the PORT command. |
---|
| 1436 | * info->use_default is set to 0 on success, 1 on failure. |
---|
| 1437 | */ |
---|
[6d0e13c] | 1438 | static void |
---|
[38371dbe] | 1439 | command_port(FTPD_SessionInfo_t *info, char const *args) |
---|
[6d0e13c] | 1440 | { |
---|
[38371dbe] | 1441 | enum { NUM_FIELDS = 6 }; |
---|
| 1442 | unsigned int a[NUM_FIELDS]; |
---|
| 1443 | int n; |
---|
| 1444 | |
---|
| 1445 | close_data_socket(info); |
---|
| 1446 | |
---|
| 1447 | n = sscanf(args, "%u,%u,%u,%u,%u,%u", a+0, a+1, a+2, a+3, a+4, a+5); |
---|
| 1448 | if(NUM_FIELDS == n) |
---|
| 1449 | { |
---|
| 1450 | int i; |
---|
[d030c4e7] | 1451 | union { |
---|
| 1452 | uint8_t b[NUM_FIELDS]; |
---|
| 1453 | struct { |
---|
| 1454 | uint32_t ip; |
---|
| 1455 | uint16_t port; |
---|
[3316af8] | 1456 | } u ; |
---|
[d030c4e7] | 1457 | } ip_info; |
---|
[38371dbe] | 1458 | |
---|
| 1459 | for(i = 0; i < NUM_FIELDS; ++i) |
---|
| 1460 | { |
---|
| 1461 | if(a[i] > 255) |
---|
| 1462 | break; |
---|
[d030c4e7] | 1463 | ip_info.b[i] = (uint8_t)a[i]; |
---|
[38371dbe] | 1464 | } |
---|
| 1465 | |
---|
| 1466 | if(i == NUM_FIELDS) |
---|
| 1467 | { |
---|
| 1468 | /* Note: while it contradicts with RFC959, we don't allow PORT command |
---|
| 1469 | * to specify IP address different than those of the originating client |
---|
| 1470 | * for the sake of safety. */ |
---|
[3316af8] | 1471 | if (ip_info.u.ip == info->def_addr.sin_addr.s_addr) |
---|
[38371dbe] | 1472 | { |
---|
[3316af8] | 1473 | info->data_addr.sin_addr.s_addr = ip_info.u.ip; |
---|
| 1474 | info->data_addr.sin_port = ip_info.u.port; |
---|
[38371dbe] | 1475 | info->data_addr.sin_family = AF_INET; |
---|
| 1476 | memset(info->data_addr.sin_zero, 0, sizeof(info->data_addr.sin_zero)); |
---|
| 1477 | |
---|
| 1478 | info->use_default = 0; |
---|
| 1479 | send_reply(info, 200, "PORT command successful."); |
---|
| 1480 | return; /* success */ |
---|
| 1481 | } |
---|
| 1482 | else |
---|
| 1483 | { |
---|
| 1484 | send_reply(info, 425, "Address doesn't match peer's IP."); |
---|
| 1485 | return; |
---|
| 1486 | } |
---|
| 1487 | } |
---|
| 1488 | } |
---|
| 1489 | send_reply(info, 501, "Syntax error."); |
---|
| 1490 | } |
---|
| 1491 | |
---|
| 1492 | |
---|
[64adc13] | 1493 | /* |
---|
[38371dbe] | 1494 | * command_pasv |
---|
| 1495 | * |
---|
| 1496 | * Handle FTP PASV command. |
---|
| 1497 | * Open socket, listen for and accept connection on it. |
---|
| 1498 | * |
---|
| 1499 | * Input parameters: |
---|
| 1500 | * info - corresponding SessionInfo structure |
---|
| 1501 | * |
---|
| 1502 | * Output parameters: |
---|
| 1503 | * info->pasv_socket is set to the descriptor of the data socket |
---|
| 1504 | */ |
---|
| 1505 | static void |
---|
| 1506 | command_pasv(FTPD_SessionInfo_t *info) |
---|
| 1507 | { |
---|
| 1508 | int s = -1; |
---|
| 1509 | int err = 1; |
---|
| 1510 | |
---|
| 1511 | close_data_socket(info); |
---|
| 1512 | |
---|
| 1513 | s = socket(PF_INET, SOCK_STREAM, 0); |
---|
| 1514 | if (s < 0) |
---|
| 1515 | syslog(LOG_ERR, "ftpd: Error creating PASV socket: %s", serr()); |
---|
| 1516 | else |
---|
| 1517 | { |
---|
| 1518 | struct sockaddr_in addr; |
---|
[ea78ecad] | 1519 | socklen_t addrLen = sizeof(addr); |
---|
[38371dbe] | 1520 | |
---|
| 1521 | addr = info->ctrl_addr; |
---|
| 1522 | addr.sin_port = htons(0); |
---|
| 1523 | |
---|
| 1524 | if (0 > bind(s, (struct sockaddr *)&addr, addrLen)) |
---|
| 1525 | syslog(LOG_ERR, "ftpd: Error binding PASV socket: %s", serr()); |
---|
| 1526 | else if (0 > listen(s, 1)) |
---|
| 1527 | syslog(LOG_ERR, "ftpd: Error listening on PASV socket: %s", serr()); |
---|
[07fbfced] | 1528 | else if(set_socket_timeout(s, info->idle)) |
---|
[38371dbe] | 1529 | { |
---|
| 1530 | char buf[FTPD_BUFSIZE]; |
---|
| 1531 | unsigned char const *ip, *p; |
---|
| 1532 | |
---|
| 1533 | getsockname(s, (struct sockaddr *)&addr, &addrLen); |
---|
| 1534 | ip = (unsigned char const*)&(addr.sin_addr); |
---|
| 1535 | p = (unsigned char const*)&(addr.sin_port); |
---|
| 1536 | snprintf(buf, FTPD_BUFSIZE, "Entering passive mode (%u,%u,%u,%u,%u,%u).", |
---|
| 1537 | ip[0], ip[1], ip[2], ip[3], p[0], p[1]); |
---|
| 1538 | send_reply(info, 227, buf); |
---|
| 1539 | |
---|
| 1540 | info->pasv_socket = accept(s, (struct sockaddr *)&addr, &addrLen); |
---|
| 1541 | if (0 > info->pasv_socket) |
---|
| 1542 | syslog(LOG_ERR, "ftpd: Error accepting PASV connection: %s", serr()); |
---|
| 1543 | else |
---|
[07fbfced] | 1544 | { |
---|
| 1545 | close_socket(s); |
---|
| 1546 | s = -1; |
---|
[38371dbe] | 1547 | err = 0; |
---|
[07fbfced] | 1548 | } |
---|
[38371dbe] | 1549 | } |
---|
| 1550 | } |
---|
| 1551 | if(err) |
---|
| 1552 | { |
---|
| 1553 | /* (OSV) The note is from FreeBSD FTPD. |
---|
| 1554 | * Note: a response of 425 is not mentioned as a possible response to |
---|
| 1555 | * the PASV command in RFC959. However, it has been blessed as a |
---|
| 1556 | * legitimate response by Jon Postel in a telephone conversation |
---|
| 1557 | * with Rick Adams on 25 Jan 89. */ |
---|
| 1558 | send_reply(info, 425, "Can't open passive connection."); |
---|
| 1559 | close_socket(s); |
---|
| 1560 | } |
---|
[6d0e13c] | 1561 | } |
---|
| 1562 | |
---|
| 1563 | |
---|
[64adc13] | 1564 | /* |
---|
[3f777d0e] | 1565 | * skip_options |
---|
| 1566 | * |
---|
| 1567 | * Utility routine to skip options (if any) from input command. |
---|
| 1568 | * |
---|
| 1569 | * Input parameters: |
---|
| 1570 | * p - pointer to pointer to command |
---|
| 1571 | * |
---|
| 1572 | * Output parameters: |
---|
| 1573 | * p - is changed to point to first non-option argument |
---|
| 1574 | */ |
---|
| 1575 | static void |
---|
| 1576 | skip_options(char **p) |
---|
| 1577 | { |
---|
| 1578 | char* buf = *p; |
---|
[38371dbe] | 1579 | char* last = NULL; |
---|
[3f777d0e] | 1580 | while(1) { |
---|
[bab5c5fa] | 1581 | while(isspace((unsigned char)*buf)) |
---|
[3f777d0e] | 1582 | ++buf; |
---|
| 1583 | if(*buf == '-') { |
---|
| 1584 | if(*++buf == '-') { /* `--' should terminate options */ |
---|
[bab5c5fa] | 1585 | if(isspace((unsigned char)*++buf)) { |
---|
[38371dbe] | 1586 | last = buf; |
---|
| 1587 | do ++buf; |
---|
[bab5c5fa] | 1588 | while(isspace((unsigned char)*buf)); |
---|
[38371dbe] | 1589 | break; |
---|
| 1590 | } |
---|
[3f777d0e] | 1591 | } |
---|
[bab5c5fa] | 1592 | while(*buf && !isspace((unsigned char)*buf)) |
---|
[3f777d0e] | 1593 | ++buf; |
---|
[38371dbe] | 1594 | last = buf; |
---|
[3f777d0e] | 1595 | } |
---|
| 1596 | else |
---|
| 1597 | break; |
---|
| 1598 | } |
---|
[38371dbe] | 1599 | if(last) |
---|
| 1600 | *last = '\0'; |
---|
[3f777d0e] | 1601 | *p = buf; |
---|
| 1602 | } |
---|
| 1603 | |
---|
[64adc13] | 1604 | /* |
---|
[38371dbe] | 1605 | * split_command |
---|
| 1606 | * |
---|
| 1607 | * Split command into command itself, options, and arguments. Command itself |
---|
| 1608 | * is converted to upper case. |
---|
| 1609 | * |
---|
| 1610 | * Input parameters: |
---|
| 1611 | * buf - initial command string |
---|
| 1612 | * |
---|
| 1613 | * Output parameter: |
---|
| 1614 | * buf - is modified by inserting '\0' at ends of split entities |
---|
| 1615 | * cmd - upper-cased command code |
---|
| 1616 | * opts - string containing all the options |
---|
| 1617 | * args - string containing all the arguments |
---|
| 1618 | */ |
---|
| 1619 | void |
---|
| 1620 | split_command(char *buf, char **cmd, char **opts, char **args) |
---|
| 1621 | { |
---|
| 1622 | char* eoc; |
---|
| 1623 | char* p = buf; |
---|
[bab5c5fa] | 1624 | while(isspace((unsigned char)*p)) |
---|
[38371dbe] | 1625 | ++p; |
---|
| 1626 | *cmd = p; |
---|
[bab5c5fa] | 1627 | while(*p && !isspace((unsigned char)*p)) |
---|
[38371dbe] | 1628 | { |
---|
[bab5c5fa] | 1629 | *p = toupper((unsigned char)*p); |
---|
[38371dbe] | 1630 | ++p; |
---|
| 1631 | } |
---|
| 1632 | eoc = p; |
---|
| 1633 | if(*p) |
---|
| 1634 | *p++ = '\0'; |
---|
[bab5c5fa] | 1635 | while(isspace((unsigned char)*p)) |
---|
[38371dbe] | 1636 | ++p; |
---|
| 1637 | *opts = p; |
---|
| 1638 | skip_options(&p); |
---|
| 1639 | *args = p; |
---|
| 1640 | if(*opts == p) |
---|
| 1641 | *opts = eoc; |
---|
| 1642 | while(*p && *p != '\r' && *p != '\n') |
---|
| 1643 | ++p; |
---|
| 1644 | if(*p) |
---|
| 1645 | *p++ = '\0'; |
---|
| 1646 | } |
---|
| 1647 | |
---|
[64adc13] | 1648 | /* |
---|
[38371dbe] | 1649 | * exec_command |
---|
| 1650 | * |
---|
| 1651 | * Parse and execute FTP command. |
---|
| 1652 | * |
---|
| 1653 | * FIXME: This section is somewhat of a hack. We should have a better |
---|
| 1654 | * way to parse commands. |
---|
| 1655 | * |
---|
| 1656 | * Input parameters: |
---|
| 1657 | * info - corresponding SessionInfo structure |
---|
| 1658 | * cmd - command to be executed (upper-case) |
---|
| 1659 | * args - arguments of the command |
---|
| 1660 | * |
---|
| 1661 | * Output parameters: |
---|
| 1662 | * NONE |
---|
| 1663 | */ |
---|
[6d0e13c] | 1664 | static void |
---|
[07fbfced] | 1665 | exec_command(FTPD_SessionInfo_t *info, char* cmd, char* args) |
---|
[6d0e13c] | 1666 | { |
---|
[3f777d0e] | 1667 | char fname[FTPD_BUFSIZE]; |
---|
[38371dbe] | 1668 | int wrong_command = 0; |
---|
[3f777d0e] | 1669 | |
---|
[07fbfced] | 1670 | fname[0] = '\0'; |
---|
| 1671 | |
---|
[38371dbe] | 1672 | if (!strcmp("PORT", cmd)) |
---|
[3f777d0e] | 1673 | { |
---|
[38371dbe] | 1674 | command_port(info, args); |
---|
[3f777d0e] | 1675 | } |
---|
[38371dbe] | 1676 | else if (!strcmp("PASV", cmd)) |
---|
[3f777d0e] | 1677 | { |
---|
[38371dbe] | 1678 | command_pasv(info); |
---|
| 1679 | } |
---|
| 1680 | else if (!strcmp("RETR", cmd)) |
---|
| 1681 | { |
---|
[ff49ffe] | 1682 | strncpy(fname, args, 254); |
---|
[3f777d0e] | 1683 | command_retrieve(info, fname); |
---|
| 1684 | } |
---|
[38371dbe] | 1685 | else if (!strcmp("STOR", cmd)) |
---|
[3f777d0e] | 1686 | { |
---|
[ff49ffe] | 1687 | strncpy(fname, args, 254); |
---|
[3f777d0e] | 1688 | command_store(info, fname); |
---|
| 1689 | } |
---|
[38371dbe] | 1690 | else if (!strcmp("LIST", cmd)) |
---|
[3f777d0e] | 1691 | { |
---|
[ff49ffe] | 1692 | strncpy(fname, args, 254); |
---|
[3f777d0e] | 1693 | command_list(info, fname, 1); |
---|
| 1694 | } |
---|
[38371dbe] | 1695 | else if (!strcmp("NLST", cmd)) |
---|
[3f777d0e] | 1696 | { |
---|
[ff49ffe] | 1697 | strncpy(fname, args, 254); |
---|
[3f777d0e] | 1698 | command_list(info, fname, 0); |
---|
| 1699 | } |
---|
[38371dbe] | 1700 | else if (!strcmp("MDTM", cmd)) |
---|
[3f777d0e] | 1701 | { |
---|
[ff49ffe] | 1702 | strncpy(fname, args, 254); |
---|
[3f777d0e] | 1703 | command_mdtm(info, fname); |
---|
| 1704 | } |
---|
[38371dbe] | 1705 | else if (!strcmp("SYST", cmd)) |
---|
[3f777d0e] | 1706 | { |
---|
[38371dbe] | 1707 | send_reply(info, 215, FTPD_SYSTYPE); |
---|
[3f777d0e] | 1708 | } |
---|
[38371dbe] | 1709 | else if (!strcmp("TYPE", cmd)) |
---|
[3f777d0e] | 1710 | { |
---|
[38371dbe] | 1711 | if (args[0] == 'I') |
---|
[3f777d0e] | 1712 | { |
---|
| 1713 | info->xfer_mode = TYPE_I; |
---|
| 1714 | send_reply(info, 200, "Type set to I."); |
---|
| 1715 | } |
---|
[38371dbe] | 1716 | else if (args[0] == 'A') |
---|
[3f777d0e] | 1717 | { |
---|
| 1718 | info->xfer_mode = TYPE_A; |
---|
| 1719 | send_reply(info, 200, "Type set to A."); |
---|
| 1720 | } |
---|
| 1721 | else |
---|
| 1722 | { |
---|
| 1723 | info->xfer_mode = TYPE_I; |
---|
| 1724 | send_reply(info, 504, "Type not implemented. Set to I."); |
---|
| 1725 | } |
---|
| 1726 | } |
---|
[86933ce0] | 1727 | else if (!strcmp("USER", cmd)) |
---|
[3f777d0e] | 1728 | { |
---|
[86933ce0] | 1729 | sscanf(args, "%254s", fname); |
---|
| 1730 | if (info->user) |
---|
| 1731 | free(info->user); |
---|
| 1732 | if (info->pass) |
---|
| 1733 | free(info->pass); |
---|
| 1734 | info->pass = NULL; |
---|
| 1735 | info->user = strdup(fname); |
---|
| 1736 | if (rtems_ftpd_configuration.login && |
---|
| 1737 | !rtems_ftpd_configuration.login(info->user, NULL)) { |
---|
| 1738 | info->auth = false; |
---|
| 1739 | send_reply(info, 331, "User name okay, need password."); |
---|
| 1740 | } else { |
---|
| 1741 | info->auth = true; |
---|
| 1742 | send_reply(info, 230, "User logged in."); |
---|
| 1743 | } |
---|
| 1744 | } |
---|
| 1745 | else if (!strcmp("PASS", cmd)) |
---|
| 1746 | { |
---|
| 1747 | sscanf(args, "%254s", fname); |
---|
| 1748 | if (info->pass) |
---|
| 1749 | free(info->pass); |
---|
| 1750 | info->pass = strdup(fname); |
---|
| 1751 | if (!info->user) { |
---|
| 1752 | send_reply(info, 332, "Need account to log in"); |
---|
| 1753 | } else { |
---|
| 1754 | if (rtems_ftpd_configuration.login && |
---|
| 1755 | !rtems_ftpd_configuration.login(info->user, info->pass)) { |
---|
| 1756 | info->auth = false; |
---|
| 1757 | send_reply(info, 530, "Not logged in."); |
---|
| 1758 | } else { |
---|
| 1759 | info->auth = true; |
---|
| 1760 | send_reply(info, 230, "User logged in."); |
---|
| 1761 | } |
---|
| 1762 | } |
---|
[3f777d0e] | 1763 | } |
---|
[38371dbe] | 1764 | else if (!strcmp("DELE", cmd)) |
---|
[3f777d0e] | 1765 | { |
---|
[86933ce0] | 1766 | if(!can_write() || !info->auth) |
---|
[38371dbe] | 1767 | { |
---|
| 1768 | send_reply(info, 550, "Access denied."); |
---|
| 1769 | } |
---|
| 1770 | else if ( |
---|
[ff49ffe] | 1771 | strncpy(fname, args, 254) && |
---|
[07fbfced] | 1772 | unlink(fname) == 0) |
---|
[3f777d0e] | 1773 | { |
---|
| 1774 | send_reply(info, 257, "DELE successful."); |
---|
| 1775 | } |
---|
| 1776 | else |
---|
| 1777 | { |
---|
| 1778 | send_reply(info, 550, "DELE failed."); |
---|
| 1779 | } |
---|
| 1780 | } |
---|
[38371dbe] | 1781 | else if (!strcmp("SITE", cmd)) |
---|
[3f777d0e] | 1782 | { |
---|
[38371dbe] | 1783 | char* opts; |
---|
| 1784 | split_command(args, &cmd, &opts, &args); |
---|
| 1785 | if(!strcmp("CHMOD", cmd)) |
---|
[3f777d0e] | 1786 | { |
---|
[38371dbe] | 1787 | int mask; |
---|
| 1788 | |
---|
[86933ce0] | 1789 | if(!can_write() || !info->auth) |
---|
[38371dbe] | 1790 | { |
---|
| 1791 | send_reply(info, 550, "Access denied."); |
---|
| 1792 | } |
---|
[ff49ffe] | 1793 | else { |
---|
| 1794 | char *c; |
---|
| 1795 | c = strchr(args, ' '); |
---|
| 1796 | if((c != NULL) && (sscanf(args, "%o", &mask) == 1) && strncpy(fname, c+1, 254) |
---|
| 1797 | && (chmod(fname, (mode_t)mask) == 0)) |
---|
| 1798 | send_reply(info, 257, "CHMOD successful."); |
---|
| 1799 | else |
---|
| 1800 | send_reply(info, 550, "CHMOD failed."); |
---|
[38371dbe] | 1801 | } |
---|
[3f777d0e] | 1802 | } |
---|
| 1803 | else |
---|
[38371dbe] | 1804 | wrong_command = 1; |
---|
[3f777d0e] | 1805 | } |
---|
[38371dbe] | 1806 | else if (!strcmp("RMD", cmd)) |
---|
[3f777d0e] | 1807 | { |
---|
[86933ce0] | 1808 | if(!can_write() || !info->auth) |
---|
[38371dbe] | 1809 | { |
---|
| 1810 | send_reply(info, 550, "Access denied."); |
---|
| 1811 | } |
---|
| 1812 | else if ( |
---|
[ff49ffe] | 1813 | strncpy(fname, args, 254) && |
---|
[07fbfced] | 1814 | rmdir(fname) == 0) |
---|
[3f777d0e] | 1815 | { |
---|
| 1816 | send_reply(info, 257, "RMD successful."); |
---|
| 1817 | } |
---|
| 1818 | else |
---|
| 1819 | { |
---|
| 1820 | send_reply(info, 550, "RMD failed."); |
---|
| 1821 | } |
---|
| 1822 | } |
---|
[38371dbe] | 1823 | else if (!strcmp("MKD", cmd)) |
---|
[3f777d0e] | 1824 | { |
---|
[86933ce0] | 1825 | if(!can_write() || !info->auth) |
---|
[38371dbe] | 1826 | { |
---|
| 1827 | send_reply(info, 550, "Access denied."); |
---|
| 1828 | } |
---|
| 1829 | else if ( |
---|
[ff49ffe] | 1830 | strncpy(fname, args, 254) && |
---|
[07fbfced] | 1831 | mkdir(fname, S_IRWXU | S_IRWXG | S_IRWXO) == 0) |
---|
[3f777d0e] | 1832 | { |
---|
| 1833 | send_reply(info, 257, "MKD successful."); |
---|
| 1834 | } |
---|
| 1835 | else |
---|
| 1836 | { |
---|
| 1837 | send_reply(info, 550, "MKD failed."); |
---|
| 1838 | } |
---|
| 1839 | } |
---|
[38371dbe] | 1840 | else if (!strcmp("CWD", cmd)) |
---|
[3f777d0e] | 1841 | { |
---|
[ff49ffe] | 1842 | strncpy(fname, args, 254); |
---|
[07fbfced] | 1843 | command_cwd(info, fname); |
---|
[3f777d0e] | 1844 | } |
---|
[38371dbe] | 1845 | else if (!strcmp("CDUP", cmd)) |
---|
[3f777d0e] | 1846 | { |
---|
[07fbfced] | 1847 | command_cwd(info, ".."); |
---|
[3f777d0e] | 1848 | } |
---|
[38371dbe] | 1849 | else if (!strcmp("PWD", cmd)) |
---|
[3f777d0e] | 1850 | { |
---|
[07fbfced] | 1851 | command_pwd(info); |
---|
[3f777d0e] | 1852 | } |
---|
| 1853 | else |
---|
[38371dbe] | 1854 | wrong_command = 1; |
---|
| 1855 | |
---|
| 1856 | if(wrong_command) |
---|
| 1857 | send_reply(info, 500, "Command not understood."); |
---|
[6d0e13c] | 1858 | } |
---|
| 1859 | |
---|
[85e24a3] | 1860 | |
---|
[64adc13] | 1861 | /* |
---|
[38371dbe] | 1862 | * session |
---|
| 1863 | * |
---|
| 1864 | * This task handles single session. It is waked up when the FTP daemon gets a |
---|
| 1865 | * service request from a remote machine. Here, we watch for commands that |
---|
| 1866 | * will come through the control connection. These commands are then parsed |
---|
| 1867 | * and executed until the connection is closed, either unintentionally or |
---|
| 1868 | * intentionally with the "QUIT" command. |
---|
| 1869 | * |
---|
| 1870 | * Input parameters: |
---|
| 1871 | * arg - pointer to corresponding SessionInfo. |
---|
| 1872 | * |
---|
| 1873 | * Output parameters: |
---|
| 1874 | * NONE |
---|
| 1875 | */ |
---|
[6d0e13c] | 1876 | static void |
---|
[3f777d0e] | 1877 | session(rtems_task_argument arg) |
---|
[6d0e13c] | 1878 | { |
---|
[38371dbe] | 1879 | FTPD_SessionInfo_t *const info = (FTPD_SessionInfo_t *)arg; |
---|
[07fbfced] | 1880 | int chroot_made = 0; |
---|
| 1881 | |
---|
| 1882 | rtems_libio_set_private_env(); |
---|
| 1883 | |
---|
| 1884 | /* chroot() can fail here because the directory may not exist yet. */ |
---|
| 1885 | chroot_made = chroot(ftpd_root) == 0; |
---|
[38371dbe] | 1886 | |
---|
| 1887 | while(1) |
---|
| 1888 | { |
---|
| 1889 | rtems_event_set set; |
---|
[6d0e13c] | 1890 | |
---|
[3f777d0e] | 1891 | rtems_event_receive(FTPD_RTEMS_EVENT, RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, |
---|
| 1892 | &set); |
---|
[6d0e13c] | 1893 | |
---|
[07fbfced] | 1894 | chroot_made = chroot_made || chroot(ftpd_root) == 0; |
---|
| 1895 | chdir("/"); |
---|
| 1896 | |
---|
| 1897 | errno = 0; |
---|
| 1898 | |
---|
[3f777d0e] | 1899 | send_reply(info, 220, FTPD_SERVER_MESSAGE); |
---|
[6d0e13c] | 1900 | |
---|
[3f777d0e] | 1901 | while (1) |
---|
| 1902 | { |
---|
[38371dbe] | 1903 | char buf[FTPD_BUFSIZE]; |
---|
| 1904 | char *cmd, *opts, *args; |
---|
| 1905 | |
---|
| 1906 | if (fgets(buf, FTPD_BUFSIZE, info->ctrl_fp) == NULL) |
---|
[6d0e13c] | 1907 | { |
---|
[3f777d0e] | 1908 | syslog(LOG_INFO, "ftpd: Connection aborted."); |
---|
| 1909 | break; |
---|
[6d0e13c] | 1910 | } |
---|
| 1911 | |
---|
[38371dbe] | 1912 | split_command(buf, &cmd, &opts, &args); |
---|
| 1913 | |
---|
| 1914 | if (!strcmp("QUIT", cmd)) |
---|
[6d0e13c] | 1915 | { |
---|
[3f777d0e] | 1916 | send_reply(info, 221, "Goodbye."); |
---|
| 1917 | break; |
---|
[6d0e13c] | 1918 | } |
---|
| 1919 | else |
---|
| 1920 | { |
---|
[07fbfced] | 1921 | exec_command(info, cmd, args); |
---|
[6d0e13c] | 1922 | } |
---|
[3f777d0e] | 1923 | } |
---|
[6d0e13c] | 1924 | |
---|
[3f777d0e] | 1925 | /* Close connection and put ourselves back into the task pool. */ |
---|
[38371dbe] | 1926 | close_data_socket(info); |
---|
[3f777d0e] | 1927 | close_stream(info); |
---|
[86933ce0] | 1928 | free(info->user); |
---|
| 1929 | free(info->pass); |
---|
[3f777d0e] | 1930 | task_pool_release(info); |
---|
| 1931 | } |
---|
[6d0e13c] | 1932 | } |
---|
| 1933 | |
---|
| 1934 | |
---|
[64adc13] | 1935 | /* |
---|
[38371dbe] | 1936 | * daemon |
---|
| 1937 | * |
---|
| 1938 | * This task runs forever. It waits for service requests on the FTP port |
---|
| 1939 | * (port 21 by default). When a request is received, it opens a new session |
---|
| 1940 | * to handle those requests until the connection is closed. |
---|
| 1941 | * |
---|
| 1942 | * Input parameters: |
---|
| 1943 | * NONE |
---|
| 1944 | * |
---|
| 1945 | * Output parameters: |
---|
| 1946 | * NONE |
---|
| 1947 | */ |
---|
[6d0e13c] | 1948 | static void |
---|
[031deada] | 1949 | daemon(rtems_task_argument args __attribute__((unused))) |
---|
[6d0e13c] | 1950 | { |
---|
[3f777d0e] | 1951 | int s; |
---|
[ea78ecad] | 1952 | socklen_t addrLen; |
---|
[38371dbe] | 1953 | struct sockaddr_in addr; |
---|
[3f777d0e] | 1954 | FTPD_SessionInfo_t *info = NULL; |
---|
| 1955 | |
---|
| 1956 | |
---|
| 1957 | s = socket(PF_INET, SOCK_STREAM, 0); |
---|
| 1958 | if (s < 0) |
---|
| 1959 | syslog(LOG_ERR, "ftpd: Error creating socket: %s", serr()); |
---|
| 1960 | |
---|
[38371dbe] | 1961 | addr.sin_family = AF_INET; |
---|
| 1962 | addr.sin_port = htons(rtems_ftpd_configuration.port); |
---|
| 1963 | addr.sin_addr.s_addr = htonl(INADDR_ANY); |
---|
| 1964 | memset(addr.sin_zero, 0, sizeof(addr.sin_zero)); |
---|
[3f777d0e] | 1965 | |
---|
[38371dbe] | 1966 | if (0 > bind(s, (struct sockaddr *)&addr, sizeof(addr))) |
---|
[3f777d0e] | 1967 | syslog(LOG_ERR, "ftpd: Error binding control socket: %s", serr()); |
---|
[38371dbe] | 1968 | else if (0 > listen(s, 1)) |
---|
[3f777d0e] | 1969 | syslog(LOG_ERR, "ftpd: Error listening on control socket: %s", serr()); |
---|
[38371dbe] | 1970 | else while (1) |
---|
[3f777d0e] | 1971 | { |
---|
| 1972 | int ss; |
---|
[38371dbe] | 1973 | addrLen = sizeof(addr); |
---|
| 1974 | ss = accept(s, (struct sockaddr *)&addr, &addrLen); |
---|
[3f777d0e] | 1975 | if (0 > ss) |
---|
| 1976 | syslog(LOG_ERR, "ftpd: Error accepting control connection: %s", serr()); |
---|
[38371dbe] | 1977 | else if(!set_socket_timeout(ss, ftpd_timeout)) |
---|
| 1978 | close_socket(ss); |
---|
[3f777d0e] | 1979 | else |
---|
| 1980 | { |
---|
| 1981 | info = task_pool_obtain(); |
---|
| 1982 | if (NULL == info) |
---|
[6d0e13c] | 1983 | { |
---|
[3f777d0e] | 1984 | close_socket(ss); |
---|
[6d0e13c] | 1985 | } |
---|
| 1986 | else |
---|
| 1987 | { |
---|
[38371dbe] | 1988 | info->ctrl_socket = ss; |
---|
| 1989 | if ((info->ctrl_fp = fdopen(info->ctrl_socket, "r+")) == NULL) |
---|
[3f777d0e] | 1990 | { |
---|
| 1991 | syslog(LOG_ERR, "ftpd: fdopen() on socket failed: %s", serr()); |
---|
| 1992 | close_stream(info); |
---|
| 1993 | task_pool_release(info); |
---|
| 1994 | } |
---|
| 1995 | else |
---|
| 1996 | { |
---|
[38371dbe] | 1997 | /* Initialize corresponding SessionInfo structure */ |
---|
| 1998 | info->def_addr = addr; |
---|
| 1999 | if(0 > getsockname(ss, (struct sockaddr *)&addr, &addrLen)) |
---|
| 2000 | { |
---|
| 2001 | syslog(LOG_ERR, "ftpd: getsockname(): %s", serr()); |
---|
| 2002 | close_stream(info); |
---|
| 2003 | task_pool_release(info); |
---|
| 2004 | } |
---|
| 2005 | else |
---|
| 2006 | { |
---|
| 2007 | info->use_default = 1; |
---|
| 2008 | info->ctrl_addr = addr; |
---|
| 2009 | info->pasv_socket = -1; |
---|
[07fbfced] | 2010 | info->data_socket = -1; |
---|
| 2011 | info->xfer_mode = TYPE_A; |
---|
[38371dbe] | 2012 | info->data_addr.sin_port = |
---|
| 2013 | htons(ntohs(info->ctrl_addr.sin_port) - 1); |
---|
| 2014 | info->idle = ftpd_timeout; |
---|
[86933ce0] | 2015 | info->user = NULL; |
---|
| 2016 | info->pass = NULL; |
---|
| 2017 | if (rtems_ftpd_configuration.login) |
---|
| 2018 | info->auth = false; |
---|
| 2019 | else |
---|
| 2020 | info->auth = true; |
---|
[38371dbe] | 2021 | /* Wakeup the session task. The task will call task_pool_release |
---|
| 2022 | after it closes connection. */ |
---|
| 2023 | rtems_event_send(info->tid, FTPD_RTEMS_EVENT); |
---|
| 2024 | } |
---|
[3f777d0e] | 2025 | } |
---|
[85e24a3] | 2026 | } |
---|
[3f777d0e] | 2027 | } |
---|
| 2028 | } |
---|
[38371dbe] | 2029 | rtems_task_delete(RTEMS_SELF); |
---|
[6d0e13c] | 2030 | } |
---|
| 2031 | |
---|
| 2032 | |
---|
[64adc13] | 2033 | /* |
---|
[38371dbe] | 2034 | * rtems_ftpd_start |
---|
| 2035 | * |
---|
| 2036 | * Here, we start the FTPD task which waits for FTP requests and services |
---|
| 2037 | * them. This procedure returns to its caller once the task is started. |
---|
| 2038 | * |
---|
| 2039 | * |
---|
| 2040 | * Input parameters: |
---|
| 2041 | * |
---|
| 2042 | * Output parameters: |
---|
| 2043 | * returns RTEMS_SUCCESSFUL on successful start of the daemon. |
---|
| 2044 | */ |
---|
[85e24a3] | 2045 | int |
---|
[e95065d] | 2046 | rtems_initialize_ftpd(void) |
---|
[6d0e13c] | 2047 | { |
---|
[3f777d0e] | 2048 | rtems_status_code sc; |
---|
| 2049 | rtems_id tid; |
---|
| 2050 | rtems_task_priority priority; |
---|
| 2051 | int count; |
---|
| 2052 | |
---|
| 2053 | if (rtems_ftpd_configuration.port == 0) |
---|
| 2054 | { |
---|
| 2055 | rtems_ftpd_configuration.port = FTPD_CONTROL_PORT; |
---|
| 2056 | } |
---|
| 2057 | |
---|
| 2058 | if (rtems_ftpd_configuration.priority == 0) |
---|
| 2059 | { |
---|
| 2060 | rtems_ftpd_configuration.priority = 40; |
---|
| 2061 | } |
---|
| 2062 | priority = rtems_ftpd_configuration.priority; |
---|
| 2063 | |
---|
[38371dbe] | 2064 | ftpd_timeout = rtems_ftpd_configuration.idle; |
---|
| 2065 | if (ftpd_timeout < 0) |
---|
| 2066 | ftpd_timeout = 0; |
---|
| 2067 | rtems_ftpd_configuration.idle = ftpd_timeout; |
---|
| 2068 | |
---|
| 2069 | ftpd_access = rtems_ftpd_configuration.access; |
---|
| 2070 | |
---|
[3f777d0e] | 2071 | if (rtems_ftpd_configuration.tasks_count <= 0) |
---|
| 2072 | rtems_ftpd_configuration.tasks_count = 1; |
---|
| 2073 | count = rtems_ftpd_configuration.tasks_count; |
---|
| 2074 | |
---|
| 2075 | if (!task_pool_init(count, priority)) |
---|
| 2076 | { |
---|
| 2077 | syslog(LOG_ERR, "ftpd: Could not initialize task pool."); |
---|
| 2078 | return RTEMS_UNSATISFIED; |
---|
| 2079 | } |
---|
| 2080 | |
---|
| 2081 | sc = rtems_task_create(rtems_build_name('F', 'T', 'P', 'D'), |
---|
[eef45d1] | 2082 | priority, RTEMS_MINIMUM_STACK_SIZE, |
---|
[3f777d0e] | 2083 | RTEMS_PREEMPT | RTEMS_NO_TIMESLICE | RTEMS_NO_ASR | |
---|
| 2084 | RTEMS_INTERRUPT_LEVEL(0), |
---|
| 2085 | RTEMS_NO_FLOATING_POINT | RTEMS_LOCAL, |
---|
| 2086 | &tid); |
---|
| 2087 | |
---|
| 2088 | if (sc == RTEMS_SUCCESSFUL) |
---|
| 2089 | { |
---|
| 2090 | sc = rtems_task_start(tid, daemon, 0); |
---|
| 2091 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 2092 | rtems_task_delete(tid); |
---|
| 2093 | } |
---|
| 2094 | |
---|
| 2095 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 2096 | { |
---|
| 2097 | task_pool_done(count); |
---|
| 2098 | syslog(LOG_ERR, "ftpd: Could not create/start FTP daemon: %s", |
---|
| 2099 | rtems_status_text(sc)); |
---|
| 2100 | return RTEMS_UNSATISFIED; |
---|
| 2101 | } |
---|
| 2102 | |
---|
[07fbfced] | 2103 | ftpd_root = "/"; |
---|
[3f777d0e] | 2104 | if ( |
---|
| 2105 | rtems_ftpd_configuration.root && |
---|
[07fbfced] | 2106 | rtems_ftpd_configuration.root[0] == '/' |
---|
| 2107 | ) |
---|
| 2108 | ftpd_root = rtems_ftpd_configuration.root; |
---|
| 2109 | |
---|
| 2110 | rtems_ftpd_configuration.root = ftpd_root; |
---|
[3f777d0e] | 2111 | |
---|
| 2112 | syslog(LOG_INFO, "ftpd: FTP daemon started (%d session%s max)", |
---|
| 2113 | count, ((count > 1) ? "s" : "")); |
---|
[07fbfced] | 2114 | |
---|
[3f777d0e] | 2115 | return RTEMS_SUCCESSFUL; |
---|
[6d0e13c] | 2116 | } |
---|