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UDP-LISTEN did not honor the max-children option
This commit is contained in:
Gerhard Rieger
parent
522cf716f8
commit
8e09093afd
3 changed files with 130 additions and 14 deletions
4
CHANGES
4
CHANGES
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@ -35,6 +35,10 @@ corrections:
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Test: USE_IPV6_JOIN_GROUP
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Thanks to Linux Lüssing for sending a patch.
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UDP-LISTEN did not honor the max-children option.
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Test: UDP4MAXCHILDREN UDP6MAXCHILDREN
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Thanks to Leander Berwers for reporting this issue.
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porting:
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Type conflict between int and sig_atomic_t between declaration and
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definition of diag_immediate_type and diag_immediate_exit broke
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122
test.sh
122
test.sh
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@ -9884,7 +9884,7 @@ elif [ "$KEYW" = "TCP6" -o "$KEYW" = "UDP6" -o "$KEYW" = "SCTP6" ] && \
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numCANT=$((numCANT+1))
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elif [ "$KEYW" = "SCTP4" ] && ! runssctp4 "$((PORT))"; then
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$PRINTF "test $F_n $TEST... ${YELLOW}$KEYW not available${NORMAL}\n" $N
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elif [ "$KEYW" = "SCTP6" ] && ! runssctp4 "$((PORT))"; then
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elif [ "$KEYW" = "SCTP6" ] && ! runssctp6 "$((PORT))"; then
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#!!! branch not reached - caught above!
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$PRINTF "test $F_n $TEST... ${YELLOW}$KEYW not available${NORMAL}\n" $N
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else
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@ -11228,41 +11228,55 @@ PORT=$((PORT+1))
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N=$((N+1))
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# test the max-children option
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NAME=MAXCHILDREN
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while read KEYW FEAT ADDR IPPORT; do
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if [ -z "$KEYW" ]|| [[ "$KEYW" == \#* ]]; then continue; fi
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PROTO=$KEYW
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proto="$(echo "$PROTO" |tr A-Z a-z)"
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# test the max-children option on really connection oriented sockets
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NAME=${KEYW}MAXCHILDREN
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case "$TESTS" in
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*%$N%*|*%functions%*|*%socket%*|*%$NAME%*)
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*%$N%*|*%functions%*|*%maxchildren%*|*%socket%*|*%$NAME%*)
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TEST="$NAME: max-children option"
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# start a listen process with max-children=1; connect with a client, let it
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# sleep some time before sending data; connect with second client that sends
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# data immediately. If max-children is working correctly the first data should
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# arrive first because the second process has to wait.
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if ! eval $NUMCOND; then :; else
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ts="$td/test$N.sock"
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case "X$IPPORT" in
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"XPORT")
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tsl=$PORT # test socket listen address
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tsc="$ADDR:$PORT" # test socket connect address
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PORT=$((PORT+1)) ;;
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*)
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tsl="$(eval echo "$ADDR")" # resolve $N
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tsc=$tsl
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esac
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#ts="$td/test$N.sock"
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tf="$td/test$N.stdout"
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te="$td/test$N.stderr"
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tdiff="$td/test$N.diff"
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da="test$N $(date) $RANDOM"
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CMD0="$TRACE $SOCAT $opts -U FILE:$tf,o-trunc,o-creat,o-append UNIX-L:$ts,fork,max-children=1"
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CMD1="$TRACE $SOCAT $opts -u - UNIX-CONNECT:$ts"
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CMD0="$TRACE $SOCAT $opts -U FILE:$tf,o-trunc,o-creat,o-append $PROTO-LISTEN:$tsl,fork,max-children=1"
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CMD1="$TRACE $SOCAT $opts -u - $PROTO-CONNECT:$tsc"
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printf "test $F_n $TEST... " $N
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$CMD0 >/dev/null 2>"${te}0" &
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pid0=$!
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waitunixport $ts 1
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(sleep 2; echo "$da 1") |$CMD1 >"${tf}1" 2>"${te}1" &
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wait${proto}port $tsl 1
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(echo "$da 1"; sleep 2) |$CMD1 >"${tf}1" 2>"${te}1" &
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pid1=$!
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sleep 1
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echo "$da 2" |$CMD1 >"${tf}2" 2>"${te}2"
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rc2=$?
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echo "$da 2" |$CMD1 >"${tf}2" 2>"${te}2" &
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pid2=$!
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rc2=$!
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sleep 2
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kill $pid0 $pid1 2>/dev/null; wait
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if echo -e "$da 1\n$da 2" |diff $tf - >$tdiff; then
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kill $pid1 $pid2 $pid0 2>/dev/null; wait
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if echo -e "$da 1\n$da 2" |diff - $tf >$tdiff; then
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$PRINTF "$OK\n"
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numOK=$((numOK+1))
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else
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$PRINTF "$FAILED\n"
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echo "$CMD0 &"
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echo "(sleep 2; echo \"$da 1\") |$CMD1"
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echo "(echo \"$da 1\"; sleep 2) |$CMD1"
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echo "echo \"$da 2\" |$CMD1"
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cat "${te}0"
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cat "${te}1"
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@ -11275,6 +11289,86 @@ fi # NUMCOND
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;;
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esac
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N=$((N+1))
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done <<<"
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TCP4 TCP 127.0.0.1 PORT
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TCP6 TCP 127.0.0.1 PORT
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SCTP4 TCP 127.0.0.1 PORT
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SCTP6 TCP 127.0.0.1 PORT
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UNIX UNIX $td/test\$N.server -
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"
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# debugging this hanging test was difficult - following lessons learned:
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# kill <parent> had no effect when child process existed
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# strace -f (on Fedora-23) sometimes writes/pads? blocks with \0, overwriting client traces
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# using the TRACE feature lets above kill command kill strace, not socat
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# care for timing, understand what you want :-)
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while read KEYW FEAT ADDR IPPORT; do
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if [ -z "$KEYW" ]|| [[ "$KEYW" == \#* ]]; then continue; fi
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PROTO=$KEYW
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proto="$(echo "$PROTO" |tr A-Z a-z)"
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# test the max-children option on pseudo connected sockets
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NAME=${KEYW}MAXCHILDREN
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case "$TESTS" in
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*%$N%*|*%functions%*|*%maxchildren%*|*%socket%*|*%dgram%*|*%udp%*|*%$NAME%*)
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TEST="$NAME: max-children option"
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# start a listen process with max-children=1; connect with a client, let it
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# send data and then sleep; connect with second client that wants to send
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# data immediately, but keep first client active until server terminates.
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#If max-children is working correctly only the first data should
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# arrive.
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if ! eval $NUMCOND; then :; else
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case "X$IPPORT" in
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"XPORT")
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tsl=$PORT # test socket listen address
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tsc="$ADDR:$PORT" # test socket connect address
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PORT=$((PORT+1)) ;;
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*)
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tsl="$(eval echo "$ADDR")" # resolve $N
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tsc=$tsl
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esac
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#ts="$td/test$N.sock"
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tf="$td/test$N.stdout"
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te="$td/test$N.stderr"
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tdiff="$td/test$N.diff"
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da="test$N $(date) $RANDOM"
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CMD0="$TRACE $SOCAT $opts -U FILE:$tf,o-trunc,o-creat,o-append $PROTO-LISTEN:$tsl,fork,max-children=1"
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CMD1="$TRACE $SOCAT $opts -u - $PROTO-CONNECT:$tsc"
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printf "test $F_n $TEST... " $N
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$CMD0 >/dev/null 2>"${te}0" &
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pid0=$!
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wait${proto}port $tsl 1
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(echo "$da 1"; sleep 3) |$CMD1 >"${tf}1" 2>"${te}1" &
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pid1=$!
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sleep 1
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echo "$da 2" |$CMD1 >"${tf}2" 2>"${te}2" &
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pid2=$!
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rc2=$!
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sleep 1
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kill -QUIT $pid1 $pid2 $pid0 2>/dev/null; wait
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if echo -e "$da 1" |diff - $tf >$tdiff; then
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$PRINTF "$OK\n"
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numOK=$((numOK+1))
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else
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$PRINTF "$FAILED\n"
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echo "$CMD0 &"
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echo "(echo \"$da 1\"; sleep 2) |$CMD1"
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echo "echo \"$da 2\" |$CMD1"
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cat "${te}0"
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cat "${te}1"
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cat "${te}2"
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cat "$tdiff"
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numFAIL=$((numFAIL+1))
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listFAIL="$listFAIL $N"
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fi
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fi # NUMCOND
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;;
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esac
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N=$((N+1))
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done <<<"
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UDP4 UDP 127.0.0.1 PORT
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UDP6 UDP 127.0.0.1 PORT
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"
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# socat up to 1.7.2.0 had a bug in xioscan_readline() that could be exploited
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18
xio-udp.c
18
xio-udp.c
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@ -86,6 +86,7 @@ int xioopen_ipdgram_listen(int argc, const char *argv[], struct opt *opts,
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int socktype = SOCK_DGRAM;
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struct pollfd readfd;
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bool dofork = false;
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int maxchildren = 0;
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pid_t pid;
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char *rangename;
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char infobuff[256];
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@ -142,6 +143,13 @@ int xioopen_ipdgram_listen(int argc, const char *argv[], struct opt *opts,
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}
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}
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retropt_int(opts, OPT_MAX_CHILDREN, &maxchildren);
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if (! dofork && maxchildren) {
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Error("option max-children not allowed without option fork");
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return STAT_NORETRY;
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}
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#if WITH_IP4 /*|| WITH_IP6*/
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if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
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if (xioparserange(rangename, pf, &fd->stream.para.socket.range) < 0) {
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@ -248,6 +256,8 @@ int xioopen_ipdgram_listen(int argc, const char *argv[], struct opt *opts,
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}
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if (pid == 0) { /* child */
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pid_t cpid = Getpid();
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xiosetenvulong("PID", cpid, 1);
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break;
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}
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@ -258,6 +268,14 @@ int xioopen_ipdgram_listen(int argc, const char *argv[], struct opt *opts,
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Info2("close(%d): %s", fd->stream.fd, strerror(errno));
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}
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while (maxchildren) {
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if (num_child < maxchildren) break;
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Notice("maxchildren are active, waiting");
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/* UINT_MAX would even be nicer, but Openindiana works only
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with 31 bits */
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while (!Sleep(INT_MAX)) ; /* any signal lets us continue */
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}
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Info("still listening");
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continue;
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}
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break;
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