add remote connection script

remote_connection.sh

@@ -0,0 +1,144 @@
+#/bin/bash
+
+#
+# little class about bash extension parametters.
+#
+# ${myvar#pattern} delete shortest occurence from the begining
+# ${myvar##pattern} delete longuest occurence from begining
+# ${myvar%pattern} delete shortest occurence from the end
+# ${myvar%%pattern} delete longuest occurence from the end
+#
+# conclusion, use of # will delete the pattern at begining
+# and % will delete the parameter at the end.
+
+
+default_user="root"
+default_hostname="localhost"
+default_ssh_port="22"
+default_rsp_port="3389"
+default_vnc_port="5900"
+
+Version="2.0.1"
+
+Usage="
+$(basename $0) [OPTION] [OPTION=VALUE] PROTOCOL
+
+script which permit to launch a remote connection protocol.
+
+PROTOCOL available
+    ssh                                     A command line protocol which can be used to connect with tcp
+    rsp                                     The windows remote server protocol
+
+PROTOCOL #TODO
+    vnc                                     Virtual Networking Computing, permit to have access to a graphical user interface.
+
+OPTION available
+    -v, --version                           print the version and exit
+    -h, --help                              print this help and exit
+    -u <user>,--user=<user>                 Select the user, by default root
+    -p <port>,--port=<port>                 Select the port, by default 10022
+    -H <hostname>, --hostname=<hostname>    Select the hostname to connect
+"
+
+
+start_ssh() {
+    if [ "${port}" == "" ]
+    then
+        port="${default_ssh_port}"
+    fi
+    echo "start ssh with user=${user} port=${port} hostname=${hostname}"
+    ssh -o "StrictHostKeyChecking no" -o "UserKnownHostsFile=/dev/null" -p "${port}" "${user}@${hostname}"
+}
+
+start_rsp() {
+    if [ "${port}" == "" ]
+    then
+        port="${default_rsp_port}"
+    fi
+    hostname="${hostname}:${port}"
+    echo "start rsp with user=${user} port=${port} hostname=${hostname}"
+    xfreerdp /v:"${hostname}" /u:"${user}" /dynamic-resolution
+}
+
+
+# Parser
+# looking for double parametters.
+
+for (( arg=1; arg<$#; arg++)); do
+    value="$((arg+1))"
+    if [ "${!arg}" == "-u" ]
+    then
+        user="${!value}"
+    elif [ "${!arg}" == "-p" ]
+    then
+        port="${!value}"
+    elif [ "${!arg}" == "-H" ]
+    then
+        hostname="${!value}"
+    fi
+done
+
+
+# looking for all parametter alone
+
+for i in "$@"; do
+    case "$i" in
+        "ssh")
+            protocol="ssh"
+            ;;
+        "rsp")
+            protocol="rsp"
+            ;;
+        "--version" | "-v")
+            echo "$(basename $0) v.${Version}"
+            exit 0
+            ;;
+        "--help" | "-h")
+            echo "${Usage}"
+            exit 0
+            ;;
+    esac
+done
+
+for i in "$@"; do
+    case "${i%=*}" in
+        "--user")
+            user="${i#*=}"
+            ;;
+        "--port")
+            port="${i#*=}"
+            ;;
+        "--hostname")
+            hostname="${i#*=}"
+            ;;
+    esac
+done
+
+if [ "${user}" == "" ]
+then
+    user="${default_user}"
+fi
+if [ "${hostname}" == "" ]
+then
+    hostname="${default_hostname}"
+fi
+
+
+
+# Last check, if protocol define, launch it, else, exit 0
+case "${protocol}" in
+    "ssh")
+        start_ssh
+        ;;
+    "rsp")
+        start_rsp
+        ;;
+    *)
+        echo "protocol ${protocol} uknown" >&2
+        echo "${Usage}"
+        exit
+        ;;
+esac
+
+
+