diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/Config.src | 23 | ||||
| -rw-r--r-- | networking/nc.c | 89 | ||||
| -rw-r--r-- | networking/nc_bloaty.c | 40 |
3 files changed, 122 insertions, 30 deletions
diff --git a/networking/Config.src b/networking/Config.src index ebad9e5..4494362 100644 --- a/networking/Config.src +++ b/networking/Config.src @@ -623,29 +623,6 @@ config FEATURE_NAMEIF_EXTENDED new_interface_name mac=00:80:C8:38:91:B5 new_interface_name 00:80:C8:38:91:B5 -config NC - bool "nc" - default y - help - A simple Unix utility which reads and writes data across network - connections. - -config NC_SERVER - bool "Netcat server options (-l)" - default y - depends on NC - help - Allow netcat to act as a server. - -config NC_EXTRA - bool "Netcat extensions (-eiw and filename)" - default y - depends on NC - help - Add -e (support for executing the rest of the command line after - making or receiving a successful connection), -i (delay interval for - lines sent), -w (timeout for initial connection). - config NETSTAT bool "netstat" default y diff --git a/networking/nc.c b/networking/nc.c index 243c479..5fd8bd7 100644 --- a/networking/nc.c +++ b/networking/nc.c @@ -9,10 +9,89 @@ #include "libbb.h" -#if ENABLE_DESKTOP -#include "nc_bloaty.c" +//config:config NC +//config: bool "nc" +//config: default y +//config: help +//config: A simple Unix utility which reads and writes data across network +//config: connections. +//config: +//config:config NC_SERVER +//config: bool "Netcat server options (-l)" +//config: default y +//config: depends on NC +//config: help +//config: Allow netcat to act as a server. +//config: +//config:config NC_EXTRA +//config: bool "Netcat extensions (-eiw and filename)" +//config: default y +//config: depends on NC +//config: help +//config: Add -e (support for executing the rest of the command line after +//config: making or receiving a successful connection), -i (delay interval for +//config: lines sent), -w (timeout for initial connection). +//config: +//config:config NC_110_COMPAT +//config: bool "Netcat 1.10 compatibility (+2.5k)" +//config: default y +//config: depends on NC +//config: help +//config: This option makes nc closely follow original nc-1.10. +//config: The code is about 2.5k bigger. It enables +//config: -s ADDR, -n, -u, -v, -o FILE, -z options, but loses +//config: busybox-specific extensions: -f FILE and -ll. + +#if ENABLE_NC_110_COMPAT +# include "nc_bloaty.c" #else +//usage:#if !ENABLE_NC_110_COMPAT +//usage: +//usage:#if ENABLE_NC_SERVER || ENABLE_NC_EXTRA +//usage:#define NC_OPTIONS_STR "\n\nOptions:" +//usage:#else +//usage:#define NC_OPTIONS_STR +//usage:#endif +//usage: +//usage:#define nc_trivial_usage +//usage: IF_NC_EXTRA("[-iN] [-wN] ")IF_NC_SERVER("[-l] [-p PORT] ") +//usage: "["IF_NC_EXTRA("-f FILE|")"IPADDR PORT]"IF_NC_EXTRA(" [-e PROG]") +//usage:#define nc_full_usage "\n\n" +//usage: "Open a pipe to IP:PORT" IF_NC_EXTRA(" or FILE") +//usage: NC_OPTIONS_STR +//usage: IF_NC_EXTRA( +//usage: "\n -e PROG Run PROG after connect" +//usage: IF_NC_SERVER( +//usage: "\n -l Listen mode, for inbound connects" +//usage: IF_NC_EXTRA( +//usage: "\n (use -l twice with -e for persistent server)") +//usage: "\n -p PORT Local port" +//usage: ) +//usage: "\n -w SEC Timeout for connect" +//usage: "\n -i SEC Delay interval for lines sent" +//usage: "\n -f FILE Use file (ala /dev/ttyS0) instead of network" +//usage: ) +//usage: +//usage:#define nc_notes_usage "" +//usage: IF_NC_EXTRA( +//usage: "To use netcat as a terminal emulator on a serial port:\n\n" +//usage: "$ stty 115200 -F /dev/ttyS0\n" +//usage: "$ stty raw -echo -ctlecho && nc -f /dev/ttyS0\n" +//usage: ) +//usage: +//usage:#define nc_example_usage +//usage: "$ nc foobar.somedomain.com 25\n" +//usage: "220 foobar ESMTP Exim 3.12 #1 Sat, 15 Apr 2000 00:03:02 -0600\n" +//usage: "help\n" +//usage: "214-Commands supported:\n" +//usage: "214- HELO EHLO MAIL RCPT DATA AUTH\n" +//usage: "214 NOOP QUIT RSET HELP\n" +//usage: "quit\n" +//usage: "221 foobar closing connection\n" +//usage: +//usage:#endif + /* Lots of small differences in features * when compared to "standard" nc */ @@ -39,7 +118,7 @@ int nc_main(int argc, char **argv) if (ENABLE_NC_SERVER || ENABLE_NC_EXTRA) { /* getopt32 is _almost_ usable: - ** it cannot handle "... -e prog -prog-opt" */ + ** it cannot handle "... -e PROG -prog-opt" */ while ((opt = getopt(argc, argv, "" IF_NC_SERVER("lp:") IF_NC_EXTRA("w:i:f:e:") )) > 0 ) { @@ -57,7 +136,7 @@ int nc_main(int argc, char **argv) /* We cannot just 'break'. We should let getopt finish. ** Or else we won't be able to find where ** 'host' and 'port' params are - ** (think "nc -w 60 host port -e prog"). */ + ** (think "nc -w 60 host port -e PROG"). */ IF_NC_EXTRA( char **p; // +2: one for progname (optarg) and one for NULL @@ -70,7 +149,7 @@ int nc_main(int argc, char **argv) ) /* optind points to argv[arvc] (NULL) now. ** FIXME: we assume that getopt will not count options - ** possibly present on "-e prog args" and will not + ** possibly present on "-e PROG ARGS" and will not ** include them into final value of optind ** which is to be used ... */ } else bb_show_usage(); diff --git a/networking/nc_bloaty.c b/networking/nc_bloaty.c index 8d27e96..c44133b 100644 --- a/networking/nc_bloaty.c +++ b/networking/nc_bloaty.c @@ -36,9 +36,9 @@ * - source routing * - multiple DNS checks * Functionalty which is different from nc 1.10: - * - Prog in '-e prog' can have prog's parameters and options. + * - Prog in '-e PROG' can have prog's parameters and options. * Because of this -e option must be last. - * - nc doesn't redirect stderr to the network socket for the -e prog. + * - nc doesn't redirect stderr to the network socket for the -e PROG. * - numeric addresses are printed in (), not [] (IPv6 looks better), * port numbers are inside (): (1.2.3.4:5678) * - network read errors are reported on verbose levels > 1 @@ -50,6 +50,42 @@ /* done in nc.c: #include "libbb.h" */ +//usage:#if ENABLE_NC_110_COMPAT +//usage: +//usage:#define nc_trivial_usage +//usage: "[OPTIONS] HOST PORT - connect" +//usage: IF_NC_SERVER("\n" +//usage: "nc [OPTIONS] -l -p PORT [HOST] [PORT] - listen") +//usage:#define nc_full_usage "\n\n" +//usage: "Options:" +//usage: "\n -e PROG Run PROG after connect (must be last)" +//usage: IF_NC_SERVER( +//usage: "\n -l Listen mode, for inbound connects" +//usage: ) +//usage: "\n -p PORT Local port" +//usage: "\n -s ADDR Local address" +//usage: "\n -w SEC Timeout for connects and final net reads" +//usage: IF_NC_EXTRA( +//usage: "\n -i SEC Delay interval for lines sent" /* ", ports scanned" */ +//usage: ) +//usage: "\n -n Don't do DNS resolution" +//usage: "\n -u UDP mode" +//usage: "\n -v Verbose" +//usage: IF_NC_EXTRA( +//usage: "\n -o FILE Hex dump traffic" +//usage: "\n -z Zero-I/O mode (scanning)" +//usage: ) +//usage:#endif + +/* "\n -r Randomize local and remote ports" */ +/* "\n -g gateway Source-routing hop point[s], up to 8" */ +/* "\n -G num Source-routing pointer: 4, 8, 12, ..." */ +/* "\nport numbers can be individual or ranges: lo-hi [inclusive]" */ + +/* -e PROG can take ARGS too: "nc ... -e ls -l", but we don't document it + * in help text: nc 1.10 does not allow that. We don't want to entice + * users to use this incompatibility */ + enum { SLEAZE_PORT = 31337, /* for UDP-scan RTT trick, change if ya want */ BIGSIZ = 8192, /* big buffers */ |