#!/usr/sbin/dtrace -Cs
/*
* tcpsnoop.d - snoop TCP network packets by process.
* Written using DTrace (Solaris 10 3/05)
*
* This analyses TCP network packets and prints the responsible PID and UID,
* plus standard details such as IP address and port. This captures traffic
* of newly created TCP connections that were established while this program
* was running. It can help identify which processes is causing TCP traffic.
*
* 20-Apr-2006, ver 0.81 (check for newer versions)
*
* USAGE: tcpsnoop.d
*
* FIELDS:
* UID user ID
* PID process ID
* CMD command
* LADDR local IP address
* RADDR remote IP address
* LPORT local port number
* RPORT remote port number
* DR direction
* SIZE packet size, bytes
*
* SEE ALSO: snoop -rS
*
* COPYRIGHT: Copyright (c) 2005, 2006 Brendan Gregg.
*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at Docs/cddl1.txt
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* CDDL HEADER END
*
* Author: Brendan Gregg [Sydney, Australia]
*
* TODO: IPv6
*
* 09-Jul-2004 Brendan Gregg Created this.
* 12-Mar-2005 " " Changed probes, size info now printed.
* 02-Jul-2005 " " Many more probes. Renamed "tcpsnoop.d".
* 03-Dec-2005 " " Fixed tcp_accept_finish bug, now 100% correct
* execname. Thanks Kias Belgaied for expertise.
* 20-Apr-2006 " " Fixed SS_TCP_FAST_ACCEPT bug in build 31+.
*/
#pragma D option quiet
#pragma D option switchrate=10hz
#include <sys/file.h>
#include <inet/common.h>
#include <sys/byteorder.h>
/*
* Print header
*/
dtrace:::BEGIN
{
/* print main headers */
printf("%5s %6s %-15s %5s %2s %-15s %5s %5s %s\n",
"UID", "PID", "LADDR", "LPORT", "DR", "RADDR", "RPORT",
"SIZE", "CMD");
}
/*
* TCP Process inbound connections
*
* 0x00200000 has been hardcoded. It was SS_TCP_FAST_ACCEPT, but was
* renamed to SS_DIRECT around build 31.
*/
fbt:sockfs:sotpi_accept:entry
/(arg1 & FREAD) && (arg1 & FWRITE) && (args[0]->so_state & 0x00200000)/
{
self->sop = args[0];
}
fbt:sockfs:sotpi_create:return
/self->sop/
{
self->nsop = (struct sonode *)arg1;
}
fbt:sockfs:sotpi_accept:return
/self->nsop/
{
this->tcpp = (tcp_t *)self->nsop->so_priv;
self->connp = (conn_t *)this->tcpp->tcp_connp;
tname[(int)self->connp] = execname;
tpid[(int)self->connp] = pid;
tuid[(int)self->connp] = uid;
}
fbt:sockfs:sotpi_accept:return
{
self->nsop = 0;
self->sop = 0;
}
/*
* TCP Process outbound connections
*/
fbt:ip:tcp_connect:entry
{
this->tcpp = (tcp_t *)arg0;
self->connp = (conn_t *)this->tcpp->tcp_connp;
tname[(int)self->connp] = execname;
tpid[(int)self->connp] = pid;
tuid[(int)self->connp] = uid;
}
/*
* TCP Data translations
*/
fbt:sockfs:sotpi_accept:return,
fbt:ip:tcp_connect:return
/self->connp/
{
/* fetch ports */
#if defined(_BIG_ENDIAN)
self->lport = self->connp->u_port.tcpu_ports.tcpu_lport;
self->fport = self->connp->u_port.tcpu_ports.tcpu_fport;
#else
self->lport = BSWAP_16(self->connp->u_port.tcpu_ports.tcpu_lport);
self->fport = BSWAP_16(self->connp->u_port.tcpu_ports.tcpu_fport);
#endif
/* fetch IPv4 addresses */
this->fad12 =
(int)self->connp->connua_v6addr.connua_faddr._S6_un._S6_u8[12];
this->fad13 =
(int)self->connp->connua_v6addr.connua_faddr._S6_un._S6_u8[13];
this->fad14 =
(int)self->connp->connua_v6addr.connua_faddr._S6_un._S6_u8[14];
this->fad15 =
(int)self->connp->connua_v6addr.connua_faddr._S6_un._S6_u8[15];
this->lad12 =
(int)self->connp->connua_v6addr.connua_laddr._S6_un._S6_u8[12];
this->lad13 =
(int)self->connp->connua_v6addr.connua_laddr._S6_un._S6_u8[13];
this->lad14 =
(int)self->connp->connua_v6addr.connua_laddr._S6_un._S6_u8[14];
this->lad15 =
(int)self->connp->connua_v6addr.connua_laddr._S6_un._S6_u8[15];
/* convert type for use with lltostr() */
this->fad12 = this->fad12 < 0 ? 256 + this->fad12 : this->fad12;
this->fad13 = this->fad13 < 0 ? 256 + this->fad13 : this->fad13;
this->fad14 = this->fad14 < 0 ? 256 + this->fad14 : this->fad14;
this->fad15 = this->fad15 < 0 ? 256 + this->fad15 : this->fad15;
this->lad12 = this->lad12 < 0 ? 256 + this->lad12 : this->lad12;
this->lad13 = this->lad13 < 0 ? 256 + this->lad13 : this->lad13;
this->lad14 = this->lad14 < 0 ? 256 + this->lad14 : this->lad14;
this->lad15 = this->lad15 < 0 ? 256 + this->lad15 : this->lad15;
/* stringify addresses */
self->faddr = strjoin(lltostr(this->fad12), ".");
self->faddr = strjoin(self->faddr, strjoin(lltostr(this->fad13), "."));
self->faddr = strjoin(self->faddr, strjoin(lltostr(this->fad14), "."));
self->faddr = strjoin(self->faddr, lltostr(this->fad15 + 0));
self->laddr = strjoin(lltostr(this->lad12), ".");
self->laddr = strjoin(self->laddr, strjoin(lltostr(this->lad13), "."));
self->laddr = strjoin(self->laddr, strjoin(lltostr(this->lad14), "."));
self->laddr = strjoin(self->laddr, lltostr(this->lad15 + 0));
/* fix direction and save values */
tladdr[(int)self->connp] = self->laddr;
tfaddr[(int)self->connp] = self->faddr;
tlport[(int)self->connp] = self->lport;
tfport[(int)self->connp] = self->fport;
/* all systems go */
tok[(int)self->connp] = 1;
}
/*
* TCP Clear connp
*/
fbt:ip:tcp_get_conn:return
{
/* Q_TO_CONN */
this->connp = (conn_t *)arg1;
tok[(int)this->connp] = 0;
tpid[(int)this->connp] = 0;
tuid[(int)this->connp] = 0;
tname[(int)this->connp] = 0;
}
/*
* TCP Process "port closed"
*/
fbt:ip:tcp_xmit_early_reset:entry
{
this->queuep = (queue_t *)`tcp_g_q; /* ` */
this->connp = (conn_t *)this->queuep->q_ptr;
this->tcpp = (tcp_t *)this->connp->conn_tcp;
/* split addresses */
this->ipha = (ipha_t *)args[1]->b_rptr;
this->fad15 = (this->ipha->ipha_src & 0xff000000) >> 24;
this->fad14 = (this->ipha->ipha_src & 0x00ff0000) >> 16;
this->fad13 = (this->ipha->ipha_src & 0x0000ff00) >> 8;
this->fad12 = (this->ipha->ipha_src & 0x000000ff);
this->lad15 = (this->ipha->ipha_dst & 0xff000000) >> 24;
this->lad14 = (this->ipha->ipha_dst & 0x00ff0000) >> 16;
this->lad13 = (this->ipha->ipha_dst & 0x0000ff00) >> 8;
this->lad12 = (this->ipha->ipha_dst & 0x000000ff);
/* stringify addresses */
self->faddr = strjoin(lltostr(this->fad12), ".");
self->faddr = strjoin(self->faddr, strjoin(lltostr(this->fad13), "."));
self->faddr = strjoin(self->faddr, strjoin(lltostr(this->fad14), "."));
self->faddr = strjoin(self->faddr, lltostr(this->fad15 + 0));
self->laddr = strjoin(lltostr(this->lad12), ".");
self->laddr = strjoin(self->laddr, strjoin(lltostr(this->lad13), "."));
self->laddr = strjoin(self->laddr, strjoin(lltostr(this->lad14), "."));
self->laddr = strjoin(self->laddr, lltostr(this->lad15 + 0));
self->reset = 1;
}
/*
* TCP Fetch "port closed" ports
*/
fbt:ip:tcp_xchg:entry
/self->reset/
{
#if defined(_BIG_ENDIAN)
self->lport = (uint16_t)arg0;
self->fport = (uint16_t)arg1;
#else
self->lport = BSWAP_16((uint16_t)arg0);
self->fport = BSWAP_16((uint16_t)arg1);
#endif
self->lport = BE16_TO_U16(arg0);
self->fport = BE16_TO_U16(arg1);
}
/*
* TCP Print "port closed"
*/
fbt:ip:tcp_xmit_early_reset:return
{
self->name = "<closed>";
self->pid = 0;
self->uid = 0;
self->size = 54; /* should check trailers */
self->dir = "<-";
printf("%5d %6d %-15s %5d %2s %-15s %5d %5d %s\n",
self->uid, self->pid, self->laddr, self->lport, self->dir,
self->faddr, self->fport, self->size, self->name);
self->dir = "->";
printf("%5d %6d %-15s %5d %2s %-15s %5d %5d %s\n",
self->uid, self->pid, self->laddr, self->lport, self->dir,
self->faddr, self->fport, self->size, self->name);
self->reset = 0;
self->size = 0;
self->name = 0;
}
/*
* TCP Process Write
*/
fbt:ip:tcp_send_data:entry
{
self->conn_p = (conn_t *)args[0]->tcp_connp;
}
fbt:ip:tcp_send_data:entry
/tok[(int)self->conn_p]/
{
self->dir = "->";
self->size = msgdsize(args[2]) + 14; /* should check trailers */
self->uid = tuid[(int)self->conn_p];
self->laddr = tladdr[(int)self->conn_p];
self->faddr = tfaddr[(int)self->conn_p];
self->lport = tlport[(int)self->conn_p];
self->fport = tfport[(int)self->conn_p];
self->ok = 2;
/* follow inetd -> in.* transitions */
self->name = pid && (tname[(int)self->conn_p] == "inetd") ?
execname : tname[(int)self->conn_p];
self->pid = pid && (tname[(int)self->conn_p] == "inetd") ?
pid : tpid[(int)self->conn_p];
tname[(int)self->conn_p] = self->name;
tpid[(int)self->conn_p] = self->pid;
}
/*
* TCP Process Read
*/
fbt:ip:tcp_rput_data:entry
{
self->conn_p = (conn_t *)arg0;
self->size = msgdsize(args[1]) + 14; /* should check trailers */
}
fbt:ip:tcp_rput_data:entry
/tok[(int)self->conn_p]/
{
self->dir = "<-";
self->uid = tuid[(int)self->conn_p];
self->laddr = tladdr[(int)self->conn_p];
self->faddr = tfaddr[(int)self->conn_p];
self->lport = tlport[(int)self->conn_p];
self->fport = tfport[(int)self->conn_p];
self->ok = 2;
/* follow inetd -> in.* transitions */
self->name = pid && (tname[(int)self->conn_p] == "inetd") ?
execname : tname[(int)self->conn_p];
self->pid = pid && (tname[(int)self->conn_p] == "inetd") ?
pid : tpid[(int)self->conn_p];
tname[(int)self->conn_p] = self->name;
tpid[(int)self->conn_p] = self->pid;
}
/*
* TCP Complete printing outbound handshake
*/
fbt:ip:tcp_connect:return
/self->connp/
{
self->name = tname[(int)self->connp];
self->pid = tpid[(int)self->connp];
self->uid = tuid[(int)self->connp];
self->size = 54; /* should check trailers */
self->dir = "->";
/* this packet occured before connp was fully established */
printf("%5d %6d %-15s %5d %2s %-15s %5d %5d %s\n",
self->uid, self->pid, self->laddr, self->lport, self->dir,
self->faddr, self->fport, self->size, self->name);
}
/*
* TCP Complete printing inbound handshake
*/
fbt:sockfs:sotpi_accept:return
/self->connp/
{
self->name = tname[(int)self->connp];
self->pid = tpid[(int)self->connp];
self->uid = tuid[(int)self->connp];
self->size = 54; /* should check trailers */
/* these packets occured before connp was fully established */
self->dir = "<-";
printf("%5d %6d %-15s %5d %2s %-15s %5d %5d %s\n",
self->uid, self->pid, self->laddr, self->lport, self->dir,
self->faddr, self->fport, self->size, self->name);
self->dir = "->";
printf("%5d %6d %-15s %5d %2s %-15s %5d %5d %s\n",
self->uid, self->pid, self->laddr, self->lport, self->dir,
self->faddr, self->fport, self->size, self->name);
self->dir = "<-";
printf("%5d %6d %-15s %5d %2s %-15s %5d %5d %s\n",
self->uid, self->pid, self->laddr, self->lport, self->dir,
self->faddr, self->fport, self->size, self->name);
}
/*
* Print output
*/
fbt:ip:tcp_send_data:entry,
fbt:ip:tcp_rput_data:entry
/self->ok == 2/
{
/* print output line */
printf("%5d %6d %-15s %5d %2s %-15s %5d %5d %s\n",
self->uid, self->pid, self->laddr, self->lport, self->dir,
self->faddr, self->fport, self->size, self->name);
}
/*
* TCP Clear connect variables
*/
fbt:sockfs:sotpi_accept:return,
fbt:ip:tcp_connect:return
/self->connp/
{
self->faddr = 0;
self->laddr = 0;
self->fport = 0;
self->lport = 0;
self->connp = 0;
self->name = 0;
self->pid = 0;
self->uid = 0;
}
/*
* TCP Clear r/w variables
*/
fbt:ip:tcp_send_data:entry,
fbt:ip:tcp_rput_data:entry
{
self->ok = 0;
self->dir = 0;
self->uid = 0;
self->pid = 0;
self->size = 0;
self->name = 0;
self->lport = 0;
self->fport = 0;
self->laddr = 0;
self->faddr = 0;
self->conn_p = 0;
}