Add dynamic rdr

usr/local/share/bastille/rdr.sh

@@ -0,0 +1,118 @@
+#!/bin/sh
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# 
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+# 
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+# 
+# * Neither the name of the copyright holder nor the names of its
+#   contributors may be used to endorse or promote products derived from
+#   this software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+. /usr/local/share/bastille/colors.pre.sh
+. /usr/local/etc/bastille/bastille.conf
+
+usage() {
+    echo -e "${COLOR_RED}Usage: bastille rdr TARGET [--clear] | [--list] | [--tcp <host_port> <jail_port>] | [--udp <host_port> <jail_port>]${COLOR_RESET}"
+    exit 1
+}
+
+# Handle special-case commands first.
+case "$1" in
+help|-h|--help)
+    usage
+    ;;
+esac
+
+if [ $# -lt 2 ]; then
+    usage
+fi
+
+TARGET="${1}"
+shift
+
+# Can only redirect to single jail
+if [ "${TARGET}" = 'ALL' ]; then
+    echo -e "${COLOR_RED}Can only redirect to single jail${COLOR_RESET}"
+    exit 1
+fi
+
+# Check jail name valid
+JAIL_NAME=$(jls -j "${TARGET}" name 2>/dev/null)
+if [ -z "${JAIL_NAME}" ]; then
+    echo -e "${COLOR_RED}Jail not found: ${TARGET}${COLOR_RESET}"
+    exit 1
+fi
+
+# Check jail ip4 address valid
+JAIL_IP=$(jls -j "${TARGET}" ip4.addr 2>/dev/null)
+if [ -z "${JAIL_IP}" -o "${JAIL_IP}" = "-" ]; then
+    echo -e "${COLOR_RED}Jail IP not found: ${TARGET}${COLOR_RESET}"
+    exit 1
+fi
+
+# Check rdr-anchor is setup in pf.conf
+if !(pfctl -sn | grep rdr-anchor | grep 'rdr/\*' >/dev/null); then
+    echo -e "${COLOR_RED}rdr-anchor not found in pf.conf${COLOR_RESET}"
+    exit 1
+fi
+
+# Check ext_if is setup in pf.conf
+EXT_IF=$(grep '^[[:space:]]*ext_if[[:space:]]*=' /etc/pf.conf)
+if [ -z "${JAIL_NAME}" ]; then
+    echo -e "${COLOR_RED}ext_if not defined in pf.conf${COLOR_RESET}"
+    exit 1
+fi
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+        --list)
+            pfctl -a "rdr/${JAIL_NAME}" -Psn 2>/dev/null
+            shift
+            ;;
+        --clear)
+            pfctl -a "rdr/${JAIL_NAME}" -Fn
+            shift
+            ;;
+        --tcp)
+            if [ $# -lt 3 ]; then
+                usage
+            fi
+            ( pfctl -a "rdr/${JAIL_NAME}" -Psn; 
+              printf '%s\nrdr on $ext_if inet proto tcp to port %d -> %s port %d\n' "$EXT_IF" "$2" "$JAIL_IP" "$3" ) \
+                  | pfctl -a "rdr/${JAIL_NAME}" -f-
+            shift 3
+            ;;
+        --udp)
+            if [ $# -lt 3 ]; then
+                usage
+            fi
+            ( pfctl -a "rdr/${JAIL_NAME}" -Psn; 
+              printf '%s\nrdr on $ext_if inet proto udp to port %d -> %s port %d\n' "$EXT_IF" "$2" "$JAIL_IP" "$3" ) \
+                  | pfctl -a "rdr/${JAIL_NAME}" -f-
+            shift 3
+            ;;
+        *)
+            usage
+            ;;
+    esac
+done
+
+
+