source: branches/stable/mindi-busybox/networking/pscan.c @ 1770

Last change on this file since 1770 was 1770, checked in by Bruno Cornec, 13 years ago
  • Better output for mindi-busybox revision
  • Remove dummy file created on NFS - report from Arnaud Tiger <arnaud.tiger_at_hp.com>
  • strace useful for debug
  • fix new versions for pb (2.0.0 for mindi and 1.7.2 for mindi-busybox)
  • fix build process for mindi-busybox + options used in that version (dd for label-partitions-as-necessary)
  • fix typo in label-partitions-as-necessary which doesn't seem to work
  • Update to busybox 1.7.2
  • perl is now required at restore time to support uuid swap partitions (and will be used for many other thigs

in the future for sure)

  • next mindi version will be 2.0.0 due to all the changes made in it (udev may break working distros)
  • small optimization in mindi on keyboard handling (one single find instead of multiple)
  • better interaction for USB device when launching mindi manually
  • attempt to automatically guess block disk size for ramdisk
  • fix typos in bkphw
  • Fix the remaining problem with UUID support for swap partitions
  • Updates mondoarchive man page for USB support
  • Adds preliminary Hardware support to mindi (Proliant SSSTK)
  • Tries to add udev support also for rhel4
  • Fix UUID support which was still broken.
  • Be conservative in test for the start-nfs script
  • Update config file for mindi-busybox for 1.7.2 migration
  • Try to run around a busybox bug (1.2.2 pb on inexistant links)
  • Add build content for mindi-busybox in pb
  • Remove distributions content for mindi-busybox
  • Fix a warning on inexistant raidtab
  • Solve problem on tmpfs in restore init (Problem of inexistant symlink and busybox)
  • Create MONDO_CACHE and use it everywhere + creation at start
  • Really never try to eject a USB device
  • Fix a issue with &> usage (replaced with 1> and 2>)
  • Adds magic file to depllist in order to have file working + ldd which helps for debugging issues
  • tty modes correct to avoid sh error messages
  • Use ext3 normally and not ext2 instead
  • USB device should be corrected after reading (take 1st part)
  • Adds a mount_USB_here function derived from mount_CDROM_here
  • usb detection place before /dev detection in device name at restore time
  • Fix when restoring from USB: media is asked in interactive mode
  • Adds USB support for mondorestore
  • mount_cdrom => mount_media
  • elilo.efi is now searched throughout /boot/efi and not in a fixed place as there is no standard
  • untar-and-softlink => untar (+ interface change)
  • suppress useless softlinks creation/removal in boot process
  • avoids udevd messages on groups
  • Increase # of disks to 99 as in mindi at restore time (should be a conf file parameter)
  • skip existing big file creation
  • seems to work correctly for USB mindi boot
  • Adds group and tty link to udev conf
  • Always load usb-torage (even 2.6) to initiate USB bus discovery
  • Better printing of messages
  • Attempt to fix a bug in supporting OpenSusE 10.3 kernel for initramfs (mindi may now use multiple regex for kernel initrd detection)
  • Links were not correctly done as non relative for modules in mindi
  • exclusion of modules denied now works
  • Also create modules in their ordinary place, so that classical modprobe works + copy modules.dep
  • Fix bugs for DENY_MODS handling
  • Add device /dev/console for udev
  • ide-generic should now really be excluded
  • Fix a bug in major number for tty
  • If udev then adds modprobe/insmod to rootfs
  • tty0 is also cretaed with udev
  • ide-generic put rather in DENY_MODS
  • udevd remove from deplist s handled in mindi directly
  • better default for mindi when using --usb
  • Handles dynamically linked busybox (in case we want to use it soon ;-)
  • Adds fixed devices to create for udev
  • ide-generic should not be part of the initrd when using libata v2
  • support a dynamically linked udev (case on Ubuntu 7.10 and Mandriva 2008.0 so should be quite generic) This will give incitation to move to dyn. linked binaries in the initrd which will help for other tasks (ia6 4)
  • Improvement in udev support (do not use cl options not available in busybox)
  • Udev in mindi
    • auto creation of the right links at boot time with udev-links.conf(from Mandriva 2008.0)
    • rework startup of udev as current makes kernel crash (from Mandriva 2008.0)
    • add support for 64 bits udev
  • Try to render MyInsmod? silent at boot time
  • Adds udev support (mandatory for newest distributions to avoid remapping of devices in a different way as on the original system)
  • We also need vaft format support for USB boot
  • Adds libusual support (Ubuntu 7.10 needs it for USB)
  • Improve Ubuntu/Debian? keyboard detection and support
  • pbinit adapted to new pb (0.8.10). Filtering of docs done in it
  • Suppress some mondo warnings and errors on USB again
  • Tries to fix lack of files in deb mindi package
  • Verify should now work for USB devices
  • More log/mesages improvement for USB support
  • - Supress g_erase_tmpdir_and_scratchdir
  • Improve some log messages for USB support
  • Try to improve install in mindi to avoid issues with isolinux.cfg not installed vene if in the pkg :-(
  • Improve mindi-busybox build
  • In conformity with pb 0.8.9
  • Add support for Ubuntu 7.10 in build process
  • Add USB Key button to Menu UI (CD streamer removed)
  • Attempt to fix error messages on tmp/scratch files at the end by removing those dir at the latest possible.
  • Fix a bug linked to the size of the -E param which could be used (Arnaud Tiger/René? Ribaud).
  • Integrate ~/.pbrc content into mondorescue.pb (required project-builder >= 0.8.7)
  • Put mondorescue in conformity with new pb filtering rules
  • Add USB support at restore time (no test done yet). New start-usb script PB varibale added where useful
  • Unmounting USB device before removal of temporary scratchdir
  • Stil refining USB copy back to mondo (one command was not executed)
  • No need to have the image subdor in the csratchdir when USB.
  • umount the USB partition before attempting to use it
  • Remove useless copy from mindi to mondo at end of USB handling

(risky merge, we are raising the limits of 2 diverging branches. The status of stable is not completely sure as such. Will need lots of tests, but it's not yet done :-()
(merge -r1692:1769 $SVN_M/branches/2.2.5)

  • Property svn:eol-style set to native
File size: 4.2 KB
Line 
1/*
2 * Pscan is a mini port scanner implementation for busybox
3 *
4 * Copyright 2007 Tito Ragusa <farmatito@tiscali.it>
5 *
6 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
7 */
8
9#include "libbb.h"
10
11/* debugging */
12#ifdef DEBUG_PSCAN
13#define DMSG(...) bb_error_msg(__VA_ARGS__)
14#define DERR(...) bb_perror_msg(__VA_ARGS__)
15#else
16#define DMSG(...) ((void)0)
17#define DERR(...) ((void)0)
18#endif
19
20static const char *port_name(unsigned port)
21{
22    struct servent *server;
23
24    server = getservbyport(htons(port), NULL);
25    if (server)
26        return server->s_name;
27    return "unknown";
28}
29
30/* We don't expect to see 1000+ seconds delay, unsigned is enough */
31#define MONOTONIC_US() ((unsigned)monotonic_us())
32
33int pscan_main(int argc, char **argv);
34int pscan_main(int argc, char **argv)
35{
36    const char *opt_max_port = "1024";      /* -P: default max port */
37    const char *opt_min_port = "1";         /* -p: default min port */
38    const char *opt_timeout = "5000";       /* -t: default timeout in msec */
39    /* We estimate rtt and wait rtt*4 before concluding that port is
40     * totally blocked. min rtt of 5 ms may be too low if you are
41     * scanning an Internet host behind saturated/traffic shaped link.
42     * Rule of thumb: with min_rtt of N msec, scanning 1000 ports
43     * will take N seconds at absolute minimum */
44    const char *opt_min_rtt = "5";          /* -T: default min rtt in msec */
45    len_and_sockaddr *lsap;
46    int s;
47    unsigned port, max_port, nports;
48    unsigned closed_ports = 0;
49    unsigned open_ports = 0;
50    /* all in usec */
51    unsigned timeout;
52    unsigned min_rtt;
53    unsigned rtt_4;
54    unsigned start;
55
56    opt_complementary = "=1"; /* exactly one non-option */
57    getopt32(argv, "p:P:t:T:", &opt_min_port, &opt_max_port, &opt_timeout, &opt_min_rtt);
58    argv += optind;
59    max_port = xatou_range(opt_max_port, 1, 65535);
60    port = xatou_range(opt_min_port, 1, max_port);
61    nports = max_port - port + 1;
62    rtt_4 = timeout = xatou_range(opt_timeout, 1, INT_MAX/1000 / 4) * 1000;
63    min_rtt = xatou_range(opt_min_rtt, 1, INT_MAX/1000 / 4) * 1000;
64
65    DMSG("min_rtt %u timeout %u", min_rtt, timeout);
66
67    lsap = xhost2sockaddr(*argv, port);
68    printf("Scanning %s ports %u to %u\n Port\tProto\tState\tService\n",
69            *argv, port, max_port);
70
71    for (; port <= max_port; port++) {
72        DMSG("rtt %u", rtt_4);
73
74        /* The SOCK_STREAM socket type is implemented on the TCP/IP protocol. */
75        set_nport(lsap, htons(port));
76        s = xsocket(lsap->sa.sa_family, SOCK_STREAM, 0);
77
78        /* We need unblocking socket so we don't need to wait for ETIMEOUT. */
79        /* Nonblocking connect typically "fails" with errno == EINPROGRESS */
80        ndelay_on(s);
81        DMSG("connect to port %u", port);
82        start = MONOTONIC_US();
83        if (connect(s, &lsap->sa, lsap->len) == 0) {
84            /* Unlikely, for me even localhost fails :) */
85            DMSG("connect succeeded");
86            goto open;
87        }
88        /* Check for untypical errors... */
89        if (errno != EAGAIN && errno != EINPROGRESS
90         && errno != ECONNREFUSED
91        ) {
92            bb_perror_nomsg_and_die();
93        }
94
95        while (1) {
96            if (errno == ECONNREFUSED) {
97                DMSG("port %u: ECONNREFUSED", port);
98                closed_ports++;
99                break;
100            }
101            DERR("port %u errno %d @%u", port, errno, MONOTONIC_US() - start);
102            if ((MONOTONIC_US() - start) > rtt_4)
103                break;
104            /* Can sleep (much) longer than specified delay.
105             * We check rtt BEFORE we usleep, otherwise
106             * on localhost we'll do zero writes done (!)
107             * before we exceed (rather small) rtt */
108            usleep(rtt_4/8);
109            DMSG("write to port %u @%u", port, MONOTONIC_US() - start);
110            if (write(s, " ", 1) >= 0) { /* We were able to write to the socket */
111 open:
112                open_ports++;
113                printf("%5u\ttcp\topen\t%s\n", port, port_name(port));
114                break;
115            }
116        }
117        DMSG("out of loop @%u", MONOTONIC_US() - start);
118
119        /* Estimate new rtt - we don't want to wait entire timeout
120         * for each port. *4 allows for rise in net delay.
121         * We increase rtt quickly (*4), decrease slowly (4/8 == 1/2)
122         * because we don't want to accidentally miss ports. */
123        rtt_4 = (MONOTONIC_US() - start) * 4;
124        if (rtt_4 < min_rtt)
125            rtt_4 = min_rtt;
126        if (rtt_4 > timeout)
127            rtt_4 = timeout;
128        /* Clean up */
129        close(s);
130    }
131    if (ENABLE_FEATURE_CLEAN_UP) free(lsap);
132
133    printf("%d closed, %d open, %d timed out ports\n",
134                    closed_ports,
135                    open_ports,
136                    nports - (closed_ports + open_ports));
137    return EXIT_SUCCESS;
138}
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