tcp: Automate TCP stream c/r

This test is very basic :( Need more work on it.
One note about --close arg to crtools -- bash leaves all
fds open when laucnhing progams, and for restore this is
critical, as one of them can be busy. Iterating over all
the possibel fds and closing them is "do not want" thing.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

crtools.c

@@ -356,6 +356,7 @@ int main(int argc, char *argv[])
 			{ "ext-unix-sk", no_argument, 0, 'x' },
 			{ "help", no_argument, 0, 'h' },
 			{ SK_EST_PARAM, no_argument, 0, 42 },
+			{ "close", required_argument, 0, 43 },
 			{ },
 		};
 
@@ -423,6 +424,14 @@ int main(int argc, char *argv[])
 			pr_info("Will dump TCP connections\n");
 			opts.tcp_established_ok = true;
 			break;
+		case 43: {
+			int fd;
+
+			fd = atoi(optarg);
+			pr_info("Closing fd %d\n", fd);
+			close(fd);
+			break;
+		}
 		case 'h':
 		default:
 			goto usage;

test/tcp/run.sh

+#!/bin/bash
+
+set -x
+
+PORT=12345
+CLN_PIPE="./clnt_pipe"
+SRV_LOG="./srv.log"
+CLN_LOG="./cln.log"
+DDIR="dump"
+CRTOOLS="../../crtools"
+
+TEXT=$(hexdump -C /dev/urandom | head -n 1)
+
+echo "Building services"
+
+make clean && make || { echo "Failed to build"; exit 1; }
+rm -rf ${DDIR} ${SRV_LOG} ${CLN_LOG} ${CLN_PIPE}
+mkdir ${DDIR}
+
+echo "Starting server"
+
+setsid ./srv ${PORT} > ${SRV_LOG} 2>&1 &
+SRV_PID=${!}
+
+echo "Starting pipe"
+mkfifo ${CLN_PIPE}
+
+echo "Starting client"
+./cln "127.0.0.1" ${PORT} < ${CLN_PIPE} > ${CLN_LOG} &
+CLN_PID=${!}
+
+exec 3>${CLN_PIPE}
+echo "Make it run"
+echo "${TEXT}" >&3
+
+function fail {
+	echo "$@"
+	kill -9 ${CLN_PID}
+	kill -9 ${SRV_PID}
+	exit 1
+}
+
+echo "Suspend server"
+${CRTOOLS} dump -D ${DDIR} -o dump.log -t ${SRV_PID} --tcp-established -vvvv || fail "Fail to dump server"
+sleep 1
+echo "Resume server"
+${CRTOOLS} restore -D ${DDIR} -o restore.log -t ${SRV_PID} -d --tcp-established -vvvv --close 3 || fail "Fail to restore server"
+
+echo "Make client run again"
+echo "${TEXT}" >&3
+
+echo "Collect results"
+exec 3>&-
+wait ${CLN_PID}
+kill -9 ${SRV_PID}