207 lines
6.6 KiB
Bash
Executable File
207 lines
6.6 KiB
Bash
Executable File
#!/bin/sh
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# Set content-type for JSON response
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echo "Content-type: application/json"
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echo ""
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# Define file paths and configuration
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QUEUE_FILE="/tmp/at_pipe.txt"
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LOCK_KEYWORD="FETCH_DATA_LOCK"
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CELL_SCAN_KEYWORD="CELL_SCAN" # Added cell scan keyword
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MAX_WAIT=6 # Maximum seconds to wait for lock
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# Function to output error in JSON format
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output_error() {
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printf '{"error": "%s"}\n' "$1"
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exit 1
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}
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# Function to wait for high-priority operations
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wait_for_high_priority() {
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while grep -q "\"command\":\"$CELL_SCAN_KEYWORD\"" "$QUEUE_FILE" || \
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grep -q "\"priority\":\"high\"" "$QUEUE_FILE"; do
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logger -t at_commands "Waiting for high-priority operation to complete"
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sleep 1
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done
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}
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# Function to clean and add lock with simplified timeout logic
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add_clean_lock() {
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local TIMESTAMP=$(date +%s)
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local WAIT_START=$(date +%s)
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# First, wait for any high-priority operations
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wait_for_high_priority
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while true; do
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local CURRENT_TIME=$(date +%s)
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# After MAX_WAIT seconds, forcibly remove any existing lock
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if [ $((CURRENT_TIME - WAIT_START)) -ge $MAX_WAIT ]; then
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# Remove any existing lock entries regardless of owner
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sed -i "/${LOCK_KEYWORD}/d" "$QUEUE_FILE"
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logger -t at_commands "Removed existing lock after $MAX_WAIT seconds timeout"
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fi
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# Add our lock entry with low priority
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printf '{"id":"%s","timestamp":"%s","command":"%s","status":"lock","pid":"%s","start_time":"%s","priority":"low"}\n' \
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"${LOCK_KEYWORD}" \
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"$(date '+%H:%M:%S')" \
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"${LOCK_KEYWORD}" \
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"$$" \
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"$TIMESTAMP" >> "$QUEUE_FILE"
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# Verify our lock was written
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if grep -q "\"pid\":\"$$\".*\"start_time\":\"$TIMESTAMP\"" "$QUEUE_FILE"; then
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logger -t at_commands "Lock created by PID $$ at $TIMESTAMP"
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# Register cleanup handler
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trap 'remove_lock; exit' INT TERM EXIT
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return 0
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fi
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# If we haven't exceeded MAX_WAIT, sleep and try again
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if [ $((CURRENT_TIME - WAIT_START)) -lt $MAX_WAIT ]; then
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sleep 1
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else
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logger -t at_commands "Failed to acquire lock after $MAX_WAIT seconds"
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return 1
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fi
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done
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}
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# Simple remove lock function that only removes our entry
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remove_lock() {
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sed -i "/\"pid\":\"$$\"/d" "$QUEUE_FILE"
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logger -t at_commands "Lock removed by PID $$"
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}
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# Improved JSON string escaping function
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escape_json() {
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printf '%s' "$1" | awk '
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BEGIN { RS="\n"; ORS="\\n" }
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{
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gsub(/\\/, "\\\\")
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gsub(/"/, "\\\"")
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gsub(/\r/, "")
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gsub(/\t/, "\\t")
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gsub(/\f/, "\\f")
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gsub(/\b/, "\\b")
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print
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}
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' | sed 's/\\n$//'
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}
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# Enhanced AT command execution with retries
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execute_at_command() {
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local CMD="$1"
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local RETRY_COUNT=0
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local MAX_RETRIES=3
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local OUTPUT=""
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while [ $RETRY_COUNT -lt $MAX_RETRIES ]; do
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OUTPUT=$(sms_tool at "$CMD" -t 4 2>/dev/null)
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if [ $? -eq 0 ] && [ -n "$OUTPUT" ]; then
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echo "$OUTPUT"
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return 0
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fi
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RETRY_COUNT=$((RETRY_COUNT + 1))
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[ $RETRY_COUNT -lt $MAX_RETRIES ] && sleep 1
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done
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logger -t at_commands "Command failed after $MAX_RETRIES attempts: $CMD"
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return 1
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}
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# Enhanced command processing function
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process_commands() {
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local commands="$1"
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local first=1
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# Start JSON array
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printf '['
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# Process each command
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for cmd in $commands; do
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# Add comma separator if not first item
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[ $first -eq 0 ] && printf ','
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first=0
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# Execute command with retries
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OUTPUT=$(execute_at_command "$cmd")
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local CMD_STATUS=$?
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# Properly escape both command and output for JSON
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ESCAPED_CMD=$(escape_json "$cmd")
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ESCAPED_OUTPUT=$(escape_json "$OUTPUT")
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# Format JSON object with proper escaping
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if [ $CMD_STATUS -eq 0 ]; then
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printf '{"command":"%s","response":"%s","status":"success"}' \
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"${ESCAPED_CMD}" \
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"${ESCAPED_OUTPUT}"
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else
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printf '{"command":"%s","response":"Command failed","status":"error"}' \
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"${ESCAPED_CMD}"
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fi
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done
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# Close JSON array
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printf ']\n'
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}
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# Main process wrapper with automatic lock handling
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main_with_clean_lock() {
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# Set timeout for the entire script
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( sleep 60; kill -TERM $$ 2>/dev/null ) &
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TIMEOUT_PID=$!
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if ! add_clean_lock; then
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output_error "Failed to acquire lock for command processing"
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kill $TIMEOUT_PID 2>/dev/null
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exit 1
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fi
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# Process commands
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process_commands "$COMMANDS"
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# Clean up
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remove_lock
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kill $TIMEOUT_PID 2>/dev/null
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}
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# Define command sets
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define_command_sets() {
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COMMAND_SET_1='AT+QUIMSLOT? AT+CNUM AT+COPS? AT+CIMI AT+ICCID AT+CGSN AT+CPIN? AT+CGDCONT? AT+CREG? AT+CFUN? AT+QENG="servingcell" AT+QTEMP AT+CGCONTRDP AT+QCAINFO AT+QRSRP AT+QMAP="WWAN" AT+C5GREG=2;+C5GREG? AT+CGREG=2;+CGREG? AT+QRSRQ AT+QSINR'
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COMMAND_SET_2='AT+CGDCONT? AT+CGCONTRDP AT+QNWPREFCFG="mode_pref" AT+QNWPREFCFG="nr5g_disable_mode" AT+QUIMSLOT?'
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COMMAND_SET_3='AT+CGMI AT+CGMM AT+QGMR AT+CNUM AT+CIMI AT+ICCID AT+CGSN AT+QMAP="LANIP" AT+QMAP="WWAN" AT+QGETCAPABILITY'
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COMMAND_SET_4='AT+QMAP="MPDN_RULE" AT+QMAP="DHCPV4DNS" AT+QCFG="usbnet"'
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COMMAND_SET_5='AT+QRSRP AT+QRSRQ AT+QSINR AT+QCAINFO AT+QSPN'
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COMMAND_SET_6='AT+CEREG=2;+CEREG? AT+C5GREG=2;+C5GREG? AT+CPIN? AT+CGDCONT? AT+CGCONTRDP AT+QMAP="WWAN" AT+QRSRP AT+QTEMP AT+QNETRC?'
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COMMAND_SET_7='AT+QNWPREFCFG="policy_band" AT+QNWPREFCFG="lte_band";+QNWPREFCFG="nsa_nr5g_band";+QNWPREFCFG="nr5g_band"'
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COMMAND_SET_8='AT+QNWLOCK="common/4g" AT+QNWLOCK="common/5g" AT+QNWLOCK="save_ctrl"'
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}
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# Main execution
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define_command_sets
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# Get command set from query string with validation
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COMMAND_SET=$(echo "$QUERY_STRING" | grep -o 'set=[1-8]' | cut -d'=' -f2 | tr -cd '0-9')
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if [ -z "$COMMAND_SET" ] || [ "$COMMAND_SET" -lt 1 ] || [ "$COMMAND_SET" -gt 8 ]; then
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COMMAND_SET=1 # Default to set 1 if invalid or no set specified
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fi
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# Select the appropriate command set
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case "$COMMAND_SET" in
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1) COMMANDS="$COMMAND_SET_1";;
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2) COMMANDS="$COMMAND_SET_2";;
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3) COMMANDS="$COMMAND_SET_3";;
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4) COMMANDS="$COMMAND_SET_4";;
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5) COMMANDS="$COMMAND_SET_5";;
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6) COMMANDS="$COMMAND_SET_6";;
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7) COMMANDS="$COMMAND_SET_7";;
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8) COMMANDS="$COMMAND_SET_8";;
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esac
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# Execute main process with clean lock handling
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main_with_clean_lock |