#!/usr/bin/ksh # # tcpsnoop_snv - snoop TCP network packets by process. # Written using DTrace (Solaris Nevada) # # 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. # # WARNING: This script may only work on Solaris Nevada and OpenSolaris # of the late 2007 vintage, since it uses the fbt provider to trace the raw # operation of a specific version of the kernel. In the future, a 'stable' # network provider should exist which will allow this to be written for that # and subsequent versions of the kernel. In the meantime, check for other # versions of this script in the /Net directory, and read the # Notes/ALLfbt_notes.txt for more background on fbt. # # $Id: tcpsnoop_snv,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ # # USAGE: tcpsnoop [-a|hjsvZ] [-n name] [-p pid] # # -a # print all data # -j # print project ID # -s # print time, us # -v # print time, string # -Z # print zone ID # -n name # command name to snoop # -p pid # PID to snoop # eg, # tcpsnoop -v # human readable timestamps # tcpsnoop -Z # print zonename # tcpsnoop -n sshd # snoop sshd traffic only # # 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 # TIME timestamp, us # STRTIME human readable timestamp, string # ZONE zone ID # PROJ project ID # # 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 # # CODE: # The FILTER syntax matches on packets rather than initial # connections, so that it can follow inetd connections properly. # # 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". # 04-Jul-2005 " " Now wrapped in shell, called "tcpsnoop". # 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+. # 20-Apr-2006 " " Last update. # 30-Sep-2007 " " Bumped this for recent OpenSolaris/Nevada. # ############################## # --- Process Arguments --- # ### default variables opt_name=0; opt_time=0; opt_timestr=0; filter=0; pname=. opt_zone=0; opt_proj=0; opt_pid=0; pid=0 ### process options while getopts ahjsvZn:p: name do case $name in a) opt_time=1; opt_timestr=1; opt_zone=1; opt_proj=1 ;; n) opt_name=1; pname=$OPTARG ;; p) opt_pid=1; pid=$OPTARG ;; j) opt_proj=1 ;; s) opt_time=1 ;; v) opt_timestr=1 ;; Z) opt_zone=1 ;; h|?) cat <<-END >&2 USAGE: tcpsnoop [-a|hjsvZ] [-n name] [-p pid] tcpsnoop # default output -a # print all data -j # print project ID -s # print start time, us -v # print start time, string -Z # print zonename -n name # command name to snoop -p pid # PID to snoop eg, tcpsnoop -v # human readable timestamps tcpsnoop -Z # print zonename tcpsnoop -n sshd # snoop sshd traffic only END exit 1 esac done ### option logic if (( opt_name || opt_pid )); then filter=1 fi ################################# # --- Main Program, DTrace --- # /usr/sbin/dtrace -Cs <( print -r ' /* * Command line arguments */ inline int OPT_name = '$opt_name'; inline int OPT_pid = '$opt_pid'; inline int OPT_time = '$opt_time'; inline int OPT_timestr = '$opt_timestr'; inline int OPT_zone = '$opt_zone'; inline int OPT_proj = '$opt_proj'; inline int PID = '$pid'; inline int FILTER = '$filter'; inline string NAME = "'$pname'"; #pragma D option quiet #pragma D option switchrate=10hz #include <sys/file.h> #include <inet/common.h> #include <sys/byteorder.h> #include <sys/socket.h> #include <sys/socketvar.h> /* * Print header */ dtrace:::BEGIN { /* print optional headers */ OPT_time ? printf("%-14s ", "TIME") : 1; OPT_timestr ? printf("%-20s ", "STRTIME") : 1; OPT_zone ? printf("%4s ", "ZONE") : 1; OPT_proj ? printf("%4s ", "PROJ") : 1; /* 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; OPT_proj ? tproj[(int)self->connp] = curpsinfo->pr_projid : 1; } /* * 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; tproj[(int)this->connp] = 0; } /* * TCP Process "port closed" */ fbt:ip:tcp_xmit_early_reset:entry /FILTER == 0/ { this->queuep = args[7]->tcps_g_q; this->connp = (conn_t *)this->queuep->q_ptr; this->tcpp = (tcp_t *)this->connp->conn_tcp; self->zoneid = this->connp->conn_zoneid; /* 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 /FILTER == 0/ { self->name = "<closed>"; self->pid = 0; self->uid = 0; self->proj = 0; self->size = 54; /* should check trailers */ self->dir = "<-"; OPT_time ? printf("%-14d ", timestamp/1000) : 1; OPT_timestr ? printf("%-20Y ", walltimestamp) : 1; OPT_zone ? printf("%4d ", self->zoneid) : 1; OPT_proj ? printf("%4d ", self->proj) : 1; 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 = "->"; OPT_time ? printf("%-14d ", timestamp/1000) : 1; OPT_timestr ? printf("%-20Y ", walltimestamp) : 1; OPT_zone ? printf("%4d ", self->zoneid) : 1; OPT_proj ? printf("%4d ", self->proj) : 1; 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; self->zoneid = 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]; OPT_proj ? self->proj = tproj[(int)self->conn_p] : 1; self->zoneid = self->conn_p->conn_zoneid; 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]; OPT_proj ? self->proj = tproj[(int)self->conn_p] : 1; self->zoneid = self->conn_p->conn_zoneid; 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->zoneid = self->connp->conn_zoneid; OPT_proj ? self->proj = tproj[(int)self->connp] : 1; self->size = 54; /* should check trailers */ self->dir = "->"; } fbt:ip:tcp_connect:return /(self->connp) && ((FILTER == 0) || (OPT_pid && self->pid == PID) || (OPT_name && self->name == NAME))/ { /* this packet occured before connp was fully established */ OPT_time ? printf("%-14d ", timestamp/1000) : 1; OPT_timestr ? printf("%-20Y ", walltimestamp) : 1; OPT_zone ? printf("%4d ", self->zoneid) : 1; OPT_proj ? printf("%4d ", self->proj) : 1; 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->zoneid = self->connp->conn_zoneid; OPT_proj ? self->proj = tproj[(int)self->connp] : 1; self->size = 54; /* should check trailers */ self->dir = "<-"; } fbt:sockfs:sotpi_accept:return /(self->connp) && ((FILTER == 0) || (OPT_pid && self->pid == PID) || (OPT_name && self->name == NAME))/ { /* these packets occured before connp was fully established */ OPT_time ? printf("%-14d ", timestamp/1000) : 1; OPT_timestr ? printf("%-20Y ", walltimestamp) : 1; OPT_zone ? printf("%4d ", self->zoneid) : 1; OPT_proj ? printf("%4d ", self->proj) : 1; 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 = "->"; OPT_time ? printf("%-14d ", timestamp/1000) : 1; OPT_timestr ? printf("%-20Y ", walltimestamp) : 1; OPT_zone ? printf("%4d ", self->zoneid) : 1; OPT_proj ? printf("%4d ", self->proj) : 1; 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 = "<-"; OPT_time ? printf("%-14d ", timestamp/1000) : 1; OPT_timestr ? printf("%-20Y ", walltimestamp) : 1; OPT_zone ? printf("%4d ", self->zoneid) : 1; OPT_proj ? printf("%4d ", self->proj) : 1; 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) && ((FILTER == 0) || (OPT_pid && self->pid == PID) || (OPT_name && self->name == NAME))/ { /* print optional fields */ OPT_time ? printf("%-14d ", timestamp/1000) : 1; OPT_timestr ? printf("%-20Y ", walltimestamp) : 1; OPT_zone ? printf("%4d ", self->zoneid) : 1; OPT_proj ? printf("%4d ", self->proj) : 1; /* 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; self->zoneid = 0; self->proj = 0; } ')