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|
# -*- tab-width: 4 -*- ;; Emacs
# vi: set filetype=sh tabstop=8 shiftwidth=8 noexpandtab :: Vi/ViM
############################################################ IDENT(1)
#
# $Title: dwatch(8) module for send(2)/recv(2) $
# $Copyright: 2014-2018 Devin Teske. All rights reserved. $
# $FreeBSD$
#
############################################################ DESCRIPTION
#
# Print details from send(2)/recv(2)
#
############################################################ PROBE
case "$PROFILE" in
sendrecv)
: ${PROBE:=$( echo \
syscall::recvfrom:return, \
syscall::recvmsg:return, \
syscall::sendmsg:entry, \
syscall::sendto:entry )} ;;
send)
: ${PROBE:=$( echo \
syscall::sendmsg:entry, \
syscall::sendto:entry )} ;;
recv)
: ${PROBE:=$( echo \
syscall::recvfrom:return, \
syscall::recvmsg:return )} ;;
recv*)
: ${PROBE:=syscall::$PROFILE:return} ;;
*)
: ${PROBE:=syscall::$PROFILE:entry}
esac
############################################################ EVENT ACTION
#[ "$CUSTOM_TEST" ] || EVENT_TEST="this->from != NULL"
############################################################ ACTIONS
exec 9<<EOF
typedef struct sainfo {
sa_family_t sa_family;
uint16_t port;
string addr;
string family;
} sainfo_t;
/*
* Address families from <sys/socket.h>
*/
#pragma D binding "1.13" address_family_string
inline string address_family_string[sa_family_t af] =
af == AF_UNSPEC ? "AF_UNSPEC" :
af == AF_LOCAL ? "AF_UNIX" :
af == AF_UNIX ? "AF_UNIX" :
af == AF_INET ? "AF_INET" :
af == AF_IMPLINK ? "AF_IMPLINK" :
af == AF_PUP ? "AF_PUP" :
af == AF_CHAOS ? "AF_CHAOS" :
af == AF_NETBIOS ? "AF_NETBIOS" :
af == AF_ISO ? "AF_ISO" :
af == AF_OSI ? "AF_ISO" :
af == AF_ECMA ? "AF_ECMA" :
af == AF_DATAKIT ? "AF_DATAKIT" :
af == AF_CCITT ? "AF_CCITT" :
af == AF_SNA ? "AF_SNA" :
af == AF_DECnet ? "AF_DECnet" :
af == AF_DLI ? "AF_DLI" :
af == AF_LAT ? "AF_LAT" :
af == AF_HYLINK ? "AF_HYLINK" :
af == AF_APPLETALK ? "AF_APPLETALK" :
af == AF_ROUTE ? "AF_ROUTE" :
af == AF_LINK ? "AF_LINK" :
af == pseudo_AF_XTP ? "pseudo_AF_XTP" :
af == AF_COIP ? "AF_COIP" :
af == AF_CNT ? "AF_CNT" :
af == pseudo_AF_RTIP ? "pseudo_AF_RTIP" :
af == AF_IPX ? "AF_IPX" :
af == AF_SIP ? "AF_SIP" :
af == pseudo_AF_PIP ? "pseudo_AF_PIP" :
af == AF_ISDN ? "AF_ISDN" :
af == AF_E164 ? "AF_ISDN" :
af == pseudo_AF_KEY ? "pseudo_AF_KEY" :
af == AF_INET6 ? "AF_INET6" :
af == AF_NATM ? "AF_NATM" :
af == AF_ATM ? "AF_ATM" :
af == pseudo_AF_HDRCMPLT ? "pseudo_AF_HDRCMPLT" :
af == AF_NETGRAPH ? "AF_NETGRAPH" :
af == AF_SLOW ? "AF_SLOW" :
af == AF_SCLUSTER ? "AF_SCLUSTER" :
af == AF_ARP ? "AF_ARP" :
af == AF_BLUETOOTH ? "AF_BLUETOOTH" :
af == AF_IEEE80211 ? "AF_IEEE80211" :
af == AF_INET_SDP ? "AF_INET_SDP" :
af == AF_INET6_SDP ? "AF_INET6_SDP" :
af == AF_MAX ? "AF_MAX" :
strjoin("AF_UNKNOWN(", strjoin(lltostr(af), ")"));
#pragma D binding "1.13" sa_data_size
inline int sa_data_size = 14;
#pragma D binding "1.13" sa_dummy_data
inline char *sa_dummy_data = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
#pragma D binding "1.13" sa_data_addr
inline string sa_data_addr[sa_family_t af, char data[sa_data_size]] =
af == AF_INET ? strjoin(
strjoin(strjoin(lltostr(data[2] & 0xFF), "."),
strjoin(lltostr(data[3] & 0xFF), ".")
),
strjoin(strjoin(lltostr(data[4] & 0xFF), "."),
lltostr(data[5] & 0xFF))
) :
"";
#pragma D binding "1.13" sa_data_port
inline uint16_t sa_data_port[sa_family_t af, char data[sa_data_size]] =
af == AF_INET ? (data[0] << 8) + data[1] :
0;
#pragma D binding "1.13" translator
translator sainfo_t < struct sockaddr *SA > {
sa_family = SA == NULL ? 0 : SA->sa_family;
family = address_family_string[SA == NULL ? 0 : SA->sa_family];
addr = SA == NULL ?
sa_data_addr[0, sa_dummy_data] :
sa_data_addr[SA->sa_family, SA->sa_data];
port = SA == NULL ?
sa_data_port[0, sa_dummy_data] :
sa_data_port[SA->sa_family, SA->sa_data];
};
this sainfo_t sainfo;
this ssize_t nbytes;
this string details;
this string flow;
this struct msghdr * msghdr;
this struct sockaddr * sa;
inline string probeflow[string func] =
func == "recvfrom" ? "<-" :
func == "recvmsg" ? "<-" :
func == "recvmmsg" ? "<-" :
"->";
inline string af_details[sa_family_t af, string addr, uint16_t port] =
af == AF_INET ? strjoin(addr, strjoin(":", lltostr(port))) :
"";
$PROBE /* probe ID $ID */
{${TRACE:+
printf("<$ID>");}
this->details = "";
this->flow = probeflow[probefunc];
}
syscall::recvfrom:entry /* probe ID $(( $ID + 1 )) */
{${TRACE:+
printf("<$(( $ID + 1 ))>");}
this->sainfo = xlate <sainfo_t> ((struct sockaddr *)(args[4] == NULL ?
NULL : copyin(arg4, sizeof(struct sockaddr))));
}
syscall::recvfrom:return /* probe ID $(( $ID + 2 )) */
{${TRACE:+
printf("<$(( $ID + 2 ))>");}
this->nbytes = arg0;
this->details = strjoin("from ", strjoin(
strjoin(this->sainfo.family, " "),
af_details[this->sainfo.sa_family,
this->sainfo.addr, this->sainfo.port]));
}
syscall::recvmsg:entry /* probe ID $(( $ID + 3 )) */
{${TRACE:+
printf("<$(( $ID + 3 ))>");}
this->sockaddr = (struct sockaddr *)arg1;
}
syscall::recvmsg:return /this->sockaddr != NULL/ /* probe ID $(( $ID + 4 )) */
{${TRACE:+
printf("<$(( $ID + 4 ))>");}
this->nbytes = arg0;
this->sainfo = xlate <sainfo_t> ((struct sockaddr *)this->sockaddr);
this->details = strjoin("sainfo=[", "]");
}
syscall::sendmsg:entry /* probe ID $(( $ID + 5 )) */
{${TRACE:+
printf("<$(( $ID + 5 ))>");}
this->nbytes = arg2;
}
syscall::sendto:entry /* probe ID $(( $ID + 6 )) */
{${TRACE:+
printf("<$(( $ID + 6 ))>");}
this->nbytes = arg2;
this->sainfo = xlate <sainfo_t> ((struct sockaddr *)(arg4 == NULL ?
NULL : copyin(arg4, sizeof(struct sockaddr))));
this->details = strjoin("to ", strjoin(
strjoin(this->sainfo.family, " "),
af_details[this->sainfo.sa_family,
this->sainfo.addr, this->sainfo.port]));
}
EOF
ACTIONS=$( cat <&9 )
ID=$(( $ID + 7 ))
############################################################ EVENT DETAILS
if [ ! "$CUSTOM_DETAILS" ]; then
exec 9<<EOF
/*
* Print socket details
*/
printf("%s %d byte%s%s%s",
this->flow,
this->nbytes,
this->nbytes != 1 ? "s" : "",
this->details != "" ? " " : "",
this->details);
EOF
EVENT_DETAILS=$( cat <&9 )
fi
################################################################################
# END
################################################################################
|
