| 1 | /*
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| 2 | * Copyright (c) 1995 Danny Gasparovski.
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| 3 | * Portions copyright (c) 2000 Kelly Price.
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| 4 | *
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| 5 | * Please read the file COPYRIGHT for the
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| 6 | * terms and conditions of the copyright.
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| 7 | */
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| 8 |
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| 9 | #include <slirp.h>
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| 10 | #include <iprt/string.h>
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| 11 | #include <iprt/stream.h>
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| 12 |
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| 13 | #ifdef DEBUG
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| 14 | void dump_packet(void *, int);
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| 15 | #endif
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| 16 |
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| 17 | /*
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| 18 | * Dump a packet in the same format as tcpdump -x
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| 19 | */
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| 20 | #ifdef DEBUG
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| 21 | void
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| 22 | dump_packet(void *dat, int n)
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| 23 | {
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| 24 | Log(("nat: PACKET DUMPED:\n%.*Vhxd\n", n, dat));
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| 25 | }
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| 26 | #endif
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| 27 |
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| 28 | #ifdef LOG_ENABLED
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| 29 | static void
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| 30 | lprint(const char *pszFormat, ...)
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| 31 | {
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| 32 | va_list args;
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| 33 | va_start(args, pszFormat);
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| 34 | RTLogPrintfV(pszFormat, args);
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| 35 | va_end(args);
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| 36 | }
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| 37 |
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| 38 | void
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| 39 | ipstats(PNATState pData)
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| 40 | {
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| 41 | lprint(" \n");
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| 42 |
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| 43 | lprint("IP stats:\n");
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| 44 | lprint(" %6d total packets received (%d were unaligned)\n",
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| 45 | ipstat.ips_total, ipstat.ips_unaligned);
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| 46 | lprint(" %6d with incorrect version\n", ipstat.ips_badvers);
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| 47 | lprint(" %6d with bad header checksum\n", ipstat.ips_badsum);
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| 48 | lprint(" %6d with length too short (len < sizeof(iphdr))\n", ipstat.ips_tooshort);
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| 49 | lprint(" %6d with length too small (len < ip->len)\n", ipstat.ips_toosmall);
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| 50 | lprint(" %6d with bad header length\n", ipstat.ips_badhlen);
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| 51 | lprint(" %6d with bad packet length\n", ipstat.ips_badlen);
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| 52 | lprint(" %6d fragments received\n", ipstat.ips_fragments);
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| 53 | lprint(" %6d fragments dropped\n", ipstat.ips_fragdropped);
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| 54 | lprint(" %6d fragments timed out\n", ipstat.ips_fragtimeout);
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| 55 | lprint(" %6d packets reassembled ok\n", ipstat.ips_reassembled);
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| 56 | lprint(" %6d outgoing packets fragmented\n", ipstat.ips_fragmented);
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| 57 | lprint(" %6d total outgoing fragments\n", ipstat.ips_ofragments);
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| 58 | lprint(" %6d with bad protocol field\n", ipstat.ips_noproto);
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| 59 | lprint(" %6d total packets delivered\n", ipstat.ips_delivered);
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| 60 | }
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| 61 |
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| 62 | void
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| 63 | tcpstats(PNATState pData)
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| 64 | {
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| 65 | lprint(" \n");
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| 66 |
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| 67 | lprint("TCP stats:\n");
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| 68 |
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| 69 | lprint(" %6d packets sent\n", tcpstat.tcps_sndtotal);
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| 70 | lprint(" %6d data packets (%d bytes)\n",
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| 71 | tcpstat.tcps_sndpack, tcpstat.tcps_sndbyte);
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| 72 | lprint(" %6d data packets retransmitted (%d bytes)\n",
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| 73 | tcpstat.tcps_sndrexmitpack, tcpstat.tcps_sndrexmitbyte);
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| 74 | lprint(" %6d ack-only packets (%d delayed)\n",
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| 75 | tcpstat.tcps_sndacks, tcpstat.tcps_delack);
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| 76 | lprint(" %6d URG only packets\n", tcpstat.tcps_sndurg);
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| 77 | lprint(" %6d window probe packets\n", tcpstat.tcps_sndprobe);
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| 78 | lprint(" %6d window update packets\n", tcpstat.tcps_sndwinup);
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| 79 | lprint(" %6d control (SYN/FIN/RST) packets\n", tcpstat.tcps_sndctrl);
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| 80 | lprint(" %6d times tcp_output did nothing\n", tcpstat.tcps_didnuttin);
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| 81 |
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| 82 | lprint(" %6d packets received\n", tcpstat.tcps_rcvtotal);
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| 83 | lprint(" %6d acks (for %d bytes)\n",
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| 84 | tcpstat.tcps_rcvackpack, tcpstat.tcps_rcvackbyte);
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| 85 | lprint(" %6d duplicate acks\n", tcpstat.tcps_rcvdupack);
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| 86 | lprint(" %6d acks for unsent data\n", tcpstat.tcps_rcvacktoomuch);
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| 87 | lprint(" %6d packets received in sequence (%d bytes)\n",
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| 88 | tcpstat.tcps_rcvpack, tcpstat.tcps_rcvbyte);
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| 89 | lprint(" %6d completely duplicate packets (%d bytes)\n",
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| 90 | tcpstat.tcps_rcvduppack, tcpstat.tcps_rcvdupbyte);
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| 91 |
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| 92 | lprint(" %6d packets with some duplicate data (%d bytes duped)\n",
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| 93 | tcpstat.tcps_rcvpartduppack, tcpstat.tcps_rcvpartdupbyte);
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| 94 | lprint(" %6d out-of-order packets (%d bytes)\n",
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| 95 | tcpstat.tcps_rcvoopack, tcpstat.tcps_rcvoobyte);
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| 96 | lprint(" %6d packets of data after window (%d bytes)\n",
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| 97 | tcpstat.tcps_rcvpackafterwin, tcpstat.tcps_rcvbyteafterwin);
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| 98 | lprint(" %6d window probes\n", tcpstat.tcps_rcvwinprobe);
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| 99 | lprint(" %6d window update packets\n", tcpstat.tcps_rcvwinupd);
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| 100 | lprint(" %6d packets received after close\n", tcpstat.tcps_rcvafterclose);
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| 101 | lprint(" %6d discarded for bad checksums\n", tcpstat.tcps_rcvbadsum);
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| 102 | lprint(" %6d discarded for bad header offset fields\n",
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| 103 | tcpstat.tcps_rcvbadoff);
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| 104 |
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| 105 | lprint(" %6d connection requests\n", tcpstat.tcps_connattempt);
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| 106 | lprint(" %6d connection accepts\n", tcpstat.tcps_accepts);
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| 107 | lprint(" %6d connections established (including accepts)\n", tcpstat.tcps_connects);
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| 108 | lprint(" %6d connections closed (including %d drop)\n",
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| 109 | tcpstat.tcps_closed, tcpstat.tcps_drops);
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| 110 | lprint(" %6d embryonic connections dropped\n", tcpstat.tcps_conndrops);
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| 111 | lprint(" %6d segments we tried to get rtt (%d succeeded)\n",
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| 112 | tcpstat.tcps_segstimed, tcpstat.tcps_rttupdated);
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| 113 | lprint(" %6d retransmit timeouts\n", tcpstat.tcps_rexmttimeo);
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| 114 | lprint(" %6d connections dropped by rxmt timeout\n",
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| 115 | tcpstat.tcps_timeoutdrop);
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| 116 | lprint(" %6d persist timeouts\n", tcpstat.tcps_persisttimeo);
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| 117 | lprint(" %6d keepalive timeouts\n", tcpstat.tcps_keeptimeo);
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| 118 | lprint(" %6d keepalive probes sent\n", tcpstat.tcps_keepprobe);
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| 119 | lprint(" %6d connections dropped by keepalive\n", tcpstat.tcps_keepdrops);
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| 120 | lprint(" %6d correct ACK header predictions\n", tcpstat.tcps_predack);
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| 121 | lprint(" %6d correct data packet header predictions\n", tcpstat.tcps_preddat);
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| 122 | lprint(" %6d TCP cache misses\n", tcpstat.tcps_socachemiss);
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| 123 |
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| 124 | /* lprint(" Packets received too short: %d\n", tcpstat.tcps_rcvshort); */
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| 125 | /* lprint(" Segments dropped due to PAWS: %d\n", tcpstat.tcps_pawsdrop); */
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| 126 |
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| 127 | }
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| 128 |
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| 129 | void
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| 130 | udpstats(PNATState pData)
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| 131 | {
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| 132 | lprint(" \n");
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| 133 |
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| 134 | lprint("UDP stats:\n");
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| 135 | lprint(" %6d datagrams received\n", udpstat.udps_ipackets);
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| 136 | lprint(" %6d with packets shorter than header\n", udpstat.udps_hdrops);
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| 137 | lprint(" %6d with bad checksums\n", udpstat.udps_badsum);
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| 138 | lprint(" %6d with data length larger than packet\n", udpstat.udps_badlen);
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| 139 | lprint(" %6d UDP socket cache misses\n", udpstat.udpps_pcbcachemiss);
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| 140 | lprint(" %6d datagrams sent\n", udpstat.udps_opackets);
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| 141 | }
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| 142 |
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| 143 | void
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| 144 | icmpstats(PNATState pData)
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| 145 | {
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| 146 | lprint(" \n");
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| 147 | lprint("ICMP stats:\n");
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| 148 | lprint(" %6d ICMP packets received\n", icmpstat.icps_received);
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| 149 | lprint(" %6d were too short\n", icmpstat.icps_tooshort);
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| 150 | lprint(" %6d with bad checksums\n", icmpstat.icps_checksum);
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| 151 | lprint(" %6d with type not supported\n", icmpstat.icps_notsupp);
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| 152 | lprint(" %6d with bad type feilds\n", icmpstat.icps_badtype);
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| 153 | lprint(" %6d ICMP packets sent in reply\n", icmpstat.icps_reflect);
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| 154 | }
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| 155 |
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| 156 | void
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| 157 | mbufstats(PNATState pData)
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| 158 | {
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| 159 | struct mbuf *m;
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| 160 | int i;
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| 161 |
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| 162 | lprint(" \n");
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| 163 |
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| 164 | lprint("Mbuf stats:\n");
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| 165 |
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| 166 | lprint(" %6d mbufs allocated (%d max)\n", mbuf_alloced, mbuf_max);
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| 167 |
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| 168 | i = 0;
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| 169 | for (m = m_freelist.m_next; m != &m_freelist; m = m->m_next)
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| 170 | i++;
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| 171 | lprint(" %6d mbufs on free list\n", i);
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| 172 |
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| 173 | i = 0;
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| 174 | for (m = m_usedlist.m_next; m != &m_usedlist; m = m->m_next)
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| 175 | i++;
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| 176 | lprint(" %6d mbufs on used list\n", i);
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| 177 | lprint(" %6d mbufs queued as packets\n\n", if_queued);
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| 178 | }
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| 179 |
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| 180 | void
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| 181 | sockstats(PNATState pData)
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| 182 | {
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| 183 | char buff[256];
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| 184 | int n;
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| 185 | struct socket *so;
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| 186 |
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| 187 | lprint(" \n");
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| 188 |
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| 189 | lprint(
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| 190 | "Proto[state] Sock Local Address, Port Remote Address, Port RecvQ SendQ\n");
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| 191 |
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| 192 | for (so = tcb.so_next; so != &tcb; so = so->so_next)
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| 193 | {
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| 194 | n = sprintf(buff, "tcp[%s]", so->so_tcpcb?tcpstates[so->so_tcpcb->t_state]:"NONE");
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| 195 | while (n < 17)
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| 196 | buff[n++] = ' ';
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| 197 | buff[17] = 0;
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| 198 | lprint("%s %3d %15s %5d ",
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| 199 | buff, so->s, inet_ntoa(so->so_laddr), ntohs(so->so_lport));
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| 200 | lprint("%15s %5d %5d %5d\n",
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| 201 | inet_ntoa(so->so_faddr), ntohs(so->so_fport),
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| 202 | so->so_rcv.sb_cc, so->so_snd.sb_cc);
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| 203 | }
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| 204 |
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| 205 | for (so = udb.so_next; so != &udb; so = so->so_next)
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| 206 | {
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| 207 | n = sprintf(buff, "udp[%d sec]", (so->so_expire - curtime) / 1000);
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| 208 | while (n < 17)
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| 209 | buff[n++] = ' ';
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| 210 | buff[17] = 0;
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| 211 | lprint("%s %3d %15s %5d ",
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| 212 | buff, so->s, inet_ntoa(so->so_laddr), ntohs(so->so_lport));
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| 213 | lprint("%15s %5d %5d %5d\n",
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| 214 | inet_ntoa(so->so_faddr), ntohs(so->so_fport),
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| 215 | so->so_rcv.sb_cc, so->so_snd.sb_cc);
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| 216 | }
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| 217 | }
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| 218 | #endif
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| 219 |
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| 220 | static DECLCALLBACK(size_t)
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| 221 | print_ipv4_address(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput,
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| 222 | const char *pszType, void const *pvValue,
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| 223 | int cchWidth, int cchPrecision, unsigned fFlags,
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| 224 | void *pvUser)
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| 225 | {
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| 226 | uint32_t ip;
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| 227 |
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| 228 | AssertReturn(strcmp(pszType, "IP4") == 0, 0);
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| 229 |
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| 230 | ip = ntohl(*(uint32_t*)pvValue);
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| 231 | return RTStrFormat(pfnOutput, pvArgOutput, NULL, 0, "%u.%u.%u.%u",
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| 232 | (ip >> 24), (ip >> 16) & 0xff, (ip >> 8) & 0xff, ip & 0xff);
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| 233 | }
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| 234 |
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| 235 | static DECLCALLBACK(size_t)
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| 236 | print_socket(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput,
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| 237 | const char *pszType, void const *pvValue,
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| 238 | int cchWidth, int cchPrecision, unsigned fFlags,
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| 239 | void *pvUser)
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| 240 | {
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| 241 | struct socket *so = (struct socket*)pvValue;
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| 242 | uint32_t ip;
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| 243 |
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| 244 | AssertReturn(strcmp(pszType, "natsock") == 0, 0);
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| 245 |
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| 246 | ip = ntohl(so->so_faddr.s_addr);
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| 247 | return RTStrFormat(pfnOutput, pvArgOutput, NULL, 0, "socket %4d: state=%04x ip=%u.%u.%u.%u",
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| 248 | so->s, so->so_state, (ip >> 24), (ip >> 16) & 0xff, (ip >> 8) & 0xff, ip & 0xff);
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| 249 | }
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| 250 |
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| 251 | static DECLCALLBACK(size_t)
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| 252 | print_networkevents(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput,
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| 253 | const char *pszType, void const *pvValue,
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| 254 | int cchWidth, int cchPrecision, unsigned fFlags,
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| 255 | void *pvUser)
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| 256 | {
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| 257 | size_t cb = 0;
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| 258 | #ifdef RT_OS_WINDOWS
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| 259 | WSANETWORKEVENTS *pNetworkEvents = (WSANETWORKEVENTS*)pvValue;
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| 260 | bool fDelim = false;
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| 261 |
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| 262 | AssertReturn(strcmp(pszType, "natwinnetevents") == 0, 0);
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| 263 |
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| 264 | cb += RTStrFormat(pfnOutput, pvArgOutput, NULL, 0, "events=%02x (", pNetworkEvents->lNetworkEvents);
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| 265 | # define DO_BIT(bit) \
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| 266 | if (pNetworkEvents->lNetworkEvents & FD_ ## bit) \
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| 267 | { \
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| 268 | cb += RTStrFormat(pfnOutput, pvArgOutput, NULL, 0, "%s" #bit "(%d)", \
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| 269 | fDelim ? "," : "", pNetworkEvents->iErrorCode[FD_ ## bit ## _BIT]); \
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| 270 | fDelim = true; \
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| 271 | }
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| 272 | DO_BIT(READ);
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| 273 | DO_BIT(WRITE);
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| 274 | DO_BIT(OOB);
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| 275 | DO_BIT(ACCEPT);
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| 276 | DO_BIT(CONNECT);
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| 277 | DO_BIT(CLOSE);
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| 278 | DO_BIT(QOS);
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| 279 | # undef DO_BIT
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| 280 | cb += RTStrFormat(pfnOutput, pvArgOutput, NULL, 0, ")");
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| 281 | #endif
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| 282 | return cb;
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| 283 | }
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| 284 |
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| 285 | #if 0
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| 286 | /*
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| 287 | * Debugging
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| 288 | */
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| 289 | int errno_func(const char *file, int line)
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| 290 | {
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| 291 | int err = WSAGetLastError();
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| 292 | LogRel(("errno=%d (%s:%d)\n", err, file, line));
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| 293 | return err;
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| 294 | }
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| 295 | #endif
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| 296 |
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| 297 | int
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| 298 | debug_init()
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| 299 | {
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| 300 | int rc = VINF_SUCCESS;
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| 301 |
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| 302 | static int g_fFormatRegistered;
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| 303 |
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| 304 | if (!g_fFormatRegistered)
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| 305 | {
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| 306 | /*
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| 307 | * XXX Move this to IPRT using RTNETADDRIPV4. Use the specifier %RNAipv4.
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| 308 | */
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| 309 | rc = RTStrFormatTypeRegister("IP4", print_ipv4_address, NULL);
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| 310 | AssertRC(rc);
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| 311 | rc = RTStrFormatTypeRegister("natsock", print_socket, NULL);
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| 312 | AssertRC(rc);
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| 313 | rc = RTStrFormatTypeRegister("natwinnetevents", print_networkevents, NULL);
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| 314 | AssertRC(rc);
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| 315 | g_fFormatRegistered = 1;
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| 316 | }
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| 317 |
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| 318 | return rc;
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| 319 | }
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