3 * Copyright (c) 2015 George V. Neville-Neil
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * The tcpdebug D script uses the tcp:kernel::debug tracepoints
30 * to replicate the action of turning on TCPDEBUG in a kernel configuration.
32 * A TCP debug statement shows a connection's
34 * direction: input, output, user, drop
35 * state: CLOSED, LISTEN, SYN_SENT, SYN_RCVD, ESTABLISHED,
36 * CLOSE_WAIT, FIN_WAIT_1, CLOSING, LAST_ACK, FIN_WAIT_2,TIME_WAIT
37 * sequence: sequence space
39 * congestion: rcv_nxt, rcv_wnd, rcv_up, snd_una, snd_nxt, snx_max,
40 * snd_wl1, snd_wl2, snd_wnd
42 * NOTE: Only sockets with SO_DEBUG set will be shown.
47 #pragma D option quiet
48 tcp:kernel::debug-input
51 seq = args[1]->tcp_seq;
52 ack = args[1]->tcp_ack;
53 len = args[2]->ip_plength - sizeof(struct tcphdr);
54 flags = args[1]->tcp_flags;
56 printf("%p %s: input [%xu..%xu]", arg0,
57 tcp_state_string[args[0]->tcps_state], seq, seq + len);
59 printf("@%x, urp=%x", ack, args[1]->tcp_urgent);
61 printf("%s", flags != 0 ? "<" : "");
62 printf("%s", flags & TH_SYN ? "SYN," :"");
63 printf("%s", flags & TH_ACK ? "ACK," :"");
64 printf("%s", flags & TH_FIN ? "FIN," :"");
65 printf("%s", flags & TH_RST ? "RST," :"");
66 printf("%s", flags & TH_PUSH ? "PUSH," :"");
67 printf("%s", flags & TH_URG ? "URG," :"");
68 printf("%s", flags & TH_ECE ? "ECE," :"");
69 printf("%s", flags & TH_CWR ? "CWR" :"");
70 printf("%s", flags != 0 ? ">" : "");
73 printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
74 args[0]->tcps_rnxt, args[0]->tcps_rwnd, args[0]->tcps_rup,
75 args[0]->tcps_suna, args[0]->tcps_snxt, args[0]->tcps_smax);
76 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
77 args[0]->tcps_swl1, args[0]->tcps_swl2, args[0]->tcps_swnd);
81 tcp:kernel::debug-output
84 seq = args[1]->tcp_seq;
85 ack = args[1]->tcp_ack;
86 len = args[2]->ip_plength - sizeof(struct tcphdr);
87 flags = args[1]->tcp_flags;
89 printf("%p %s: output [%x..%x]", arg0,
90 tcp_state_string[args[0]->tcps_state], seq, seq + len);
92 printf("@%x, urp=%x", ack, args[1]->tcp_urgent);
94 printf("%s", flags != 0 ? "<" : "");
95 printf("%s", flags & TH_SYN ? "SYN," :"");
96 printf("%s", flags & TH_ACK ? "ACK," :"");
97 printf("%s", flags & TH_FIN ? "FIN," :"");
98 printf("%s", flags & TH_RST ? "RST," :"");
99 printf("%s", flags & TH_PUSH ? "PUSH," :"");
100 printf("%s", flags & TH_URG ? "URG," :"");
101 printf("%s", flags & TH_ECE ? "ECE," :"");
102 printf("%s", flags & TH_CWR ? "CWR" :"");
103 printf("%s", flags != 0 ? ">" : "");
106 printf("\trcv_(nxt,wnd,up) (%u,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
107 args[0]->tcps_rnxt, args[0]->tcps_rwnd, args[0]->tcps_rup,
108 args[0]->tcps_suna, args[0]->tcps_snxt, args[0]->tcps_smax);
109 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
110 args[0]->tcps_swl1, args[0]->tcps_swl2, args[0]->tcps_swnd);
114 tcp:kernel::debug-drop
115 /args[0]->tcps_debug/
117 printf("%p %s: output [x..x] @%x, urp=%x\n", arg0,
118 tcp_state_string[args[0]->tcps_state],
120 args[1]->tcp_urgent);
122 seq = args[1]->tcp_seq;
123 ack = args[1]->tcp_ack;
124 len = args[2]->ip_plength - sizeof(struct tcphdr);
125 flags = args[1]->tcp_flags;
127 printf("%p %s: drop [%x..%x]", arg0,
128 tcp_state_string[args[0]->tcps_state], seq, seq + len);
130 printf("@%x, urp=%x", ack, args[1]->tcp_urgent);
132 printf("%s", flags != 0 ? "<" : "");
133 printf("%s", flags & TH_SYN ? "SYN," :"");
134 printf("%s", flags & TH_ACK ? "ACK," :"");
135 printf("%s", flags & TH_FIN ? "FIN," :"");
136 printf("%s", flags & TH_RST ? "RST," :"");
137 printf("%s", flags & TH_PUSH ? "PUSH," :"");
138 printf("%s", flags & TH_URG ? "URG," :"");
139 printf("%s", flags & TH_ECE ? "ECE," :"");
140 printf("%s", flags & TH_CWR ? "CWR" :"");
141 printf("%s", flags != 0 ? ">" : "");
144 printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
145 args[0]->tcps_rnxt, args[0]->tcps_rwnd, args[0]->tcps_rup,
146 args[0]->tcps_suna, args[0]->tcps_snxt, args[0]->tcps_smax);
147 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
148 args[0]->tcps_swl1, args[0]->tcps_swl2, args[0]->tcps_swnd);
152 tcp:kernel::debug-user
153 /args[0]->tcps_debug/
155 printf("%p %s: user ", arg0,
156 tcp_state_string[args[0]->tcps_state]);
158 printf("%s", prureq_string[arg1]);
160 printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
161 args[0]->tcps_rnxt, args[0]->tcps_rwnd, args[0]->tcps_rup,
162 args[0]->tcps_suna, args[0]->tcps_snxt, args[0]->tcps_smax);
163 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
164 args[0]->tcps_swl1, args[0]->tcps_swl2, args[0]->tcps_swnd);