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Add service.sh and customise.sh
1. Create Base files during installations and check and ignore during update. 2. Check interface and update TCP congestion algorithm. 3. Add debounce logic for quick toggles. 4. Check for change every 5s. 5. Add logging during change.
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‎README.md

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@@ -10,8 +10,10 @@ In certain kernel, TCP Congestion Algorithm BBR might be enabled. Or you want to
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3. Reboot device.
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## Note:
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1. Default algorithm is **cubic** for **cellular**.
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2. Default algorithm is **brr** if exists for **WiFi**. Else **cubic**.
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3. You can change algorithm by just renaming the file in same format. Eg: If you want to change WiFi TCP congestion algorithm to **reno**, rename `wlan_{algo}` file to `wlan_reno`.
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4. There is an option to kill current tcp connections during algorithm change. This might stop downloads, uploads or other ongoing connections. So apps affected might need to be restarted. To enable create a file named `kill_connections` in module folder. This is disabled by default.
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5. Algorithm is applied only if present in kernel.
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1. `{algo}` in filename can be any TCP congestion algorithm (cubic, bbr, reno etc..).
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2. Default algorithm is **cubic** for **cellular**.
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3. Default algorithm is **bbr** if exists for **WiFi**. Else **cubic**.
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4. You can change algorithm by just renaming the file in same format. Eg: If you want to change WiFi TCP congestion algorithm to **reno**, rename `wlan_{algo}` file to `wlan_reno`.
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5. There is an option to kill current tcp connections during algorithm change. This might stop downloads, uploads or other ongoing connections. So apps affected might need to be restarted. To enable create a file named `kill_connections` in module folder. This is disabled by default.
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6. Algorithm is applied only if present in kernel.
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7. Module logs are present in `/data/adb/modules/tcp_optimiser/service.log`.

‎module/customize.sh

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#!/system/bin/sh
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ui_print "- Starting module customization..."
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# Detect congestion algorithm
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ui_print "- Checking TCP congestion algorithm..."
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if grep -qw bbr /proc/sys/net/ipv4/tcp_available_congestion_control; then
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CONG="bbr"
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ui_print "- Found BBR!"
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else
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CONG="cubic"
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ui_print "- BBR not found. Going with Cubic!"
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fi
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MODULE_NAME=$(basename "$MODPATH")
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MODULE_PATH="/data/adb/modules/$MODULE_NAME"
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# Check both live and update folders
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check_exists_anywhere() {
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local prefix="$1"
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# Check in current path
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if ls "$MODPATH"/${prefix}_* >/dev/null 2>&1; then
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return 0
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fi
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# Check in Module main path
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if ls "$MODULE_PATH"/${prefix}_* >/dev/null 2>&1; then
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return 0
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fi
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return 1
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}
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create_file_if_needed() {
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local prefix="$1"
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local suffix="$2"
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local target="$MODPATH/${prefix}_${suffix}"
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if check_exists_anywhere "$prefix"; then
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ui_print "- Skipping $target: another ${prefix}_* file exists."
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return
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fi
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if [ ! -f "$target" ]; then
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touch "$target"
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ui_print "- Created: $target"
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else
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ui_print "- Skipped: $target already exists"
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fi
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}
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# Create wlan_* based on BBR availability
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if [ "$CONG" = "bbr" ]; then
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create_file_if_needed "wlan" "bbr"
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else
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create_file_if_needed "wlan" "cubic"
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fi
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# Always create rmnet_data_cubic unless another exists
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create_file_if_needed "rmnet_data" "cubic"

‎module/service.sh

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#!/system/bin/sh
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MODPATH="${0%/*}"
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LOGFILE="$MODPATH/service.log"
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FLAGFILE="/dev/.tcp_module_log_cleared"
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MAX_LOG_LINES=200
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DEBOUNCE_TIME=10
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# Clear log on first run after boot
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if [ ! -f "$FLAGFILE" ]; then
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rm -f "$LOGFILE" >/dev/null 2>&1
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touch "$FLAGFILE" >/dev/null 2>&1
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fi
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# On startup, reset description to default
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if [ -f "$MODPATH/module.prop" ]; then
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sed -i 's|^description=.*|description=TCP Optimisations & update tcp_cong_algo based on interface|' "$MODPATH/module.prop"
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fi
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log_print() {
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local timestamp
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timestamp=$(date +'%Y-%m-%d %H:%M:%S')
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echo "$timestamp - $1" >> "$LOGFILE"
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line_count=$(wc -l < "$LOGFILE" 2>/dev/null | awk '{print $1}')
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if [ "$line_count" -gt "$MAX_LOG_LINES" ]; then
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tail -n "$((MAX_LOG_LINES / 2))" "$LOGFILE" > "${LOGFILE}.tmp"
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mv "${LOGFILE}.tmp" "$LOGFILE"
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fi
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}
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# Run commands as root using su -c
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run_as_root() {
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if [ "$(id -u)" -eq 0 ]; then
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sh -c "$1"
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else
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su -c "$1"
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fi
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}
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update_description() {
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local iface="$1"
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local algo="$2"
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local icon="🌐"
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case "$iface" in
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wlan) icon="🛜" ;;
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mobile) icon="📶" ;;
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esac
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local desc="TCP Optimisations & update tcp_cong_algo based on interface | iface: $iface $icon | algo: $algo"
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run_as_root "sed -i \"s/^description=.*/description=$desc/\" \"$MODPATH/module.prop\""
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}
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kill_tcp_connections() {
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if [ -f "$MODPATH/kill_connections" ]; then
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log_print "Killing all TCP connections (IPv4 and IPv6) due to congestion change"
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# Kill all IPv4 connections (destination 0.0.0.0/0)
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run_as_root "ss -K dst 0.0.0.0/0" # Kill all IPv4 connections
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# Kill all IPv6 connections (destination ::/0)
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run_as_root "ss -K dst ::/0" # Kill all IPv6 connections
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fi
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}
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set_congestion() {
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local algo="$1"
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local mode="$2"
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if grep -qw "$algo" /proc/sys/net/ipv4/tcp_available_congestion_control; then
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run_as_root "echo \"$algo\" > /proc/sys/net/ipv4/tcp_congestion_control 2>/dev/null"
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log_print "Applied congestion control: $algo ($mode)"
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kill_tcp_connections
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update_description "$mode" "$algo"
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else
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log_print "Unavailable algorithm: $algo"
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fi
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}
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get_active_iface() {
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iface=$(ip route get 192.0.2.1 2>/dev/null | awk '/dev/ {for(i=1;i<=NF;i++) if($i=="dev") print $(i+1)}')
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echo "$iface"
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}
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last_mode=""
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change_time=0
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while true; do
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iface=$(get_active_iface)
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new_mode="none"
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case "$iface" in
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wlan*) new_mode="wifi" ;;
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rmnet_data*) new_mode="mobile" ;;
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*) new_mode="none" ;;
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esac
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current_time=$(date +%s)
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if [ "$new_mode" != "$last_mode" ]; then
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if [ "$((current_time - change_time))" -ge "$DEBOUNCE_TIME" ]; then
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applied=0
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if [ "$new_mode" = "wifi" ]; then
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for algo in bbr reno cubic; do
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if [ -f "$MODPATH/wlan_$algo" ]; then
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set_congestion "$algo" "$new_mode"
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applied=1
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break
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fi
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done
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[ "$applied" -eq 0 ] && set_congestion cubic "$new_mode"
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elif [ "$new_mode" = "mobile" ]; then
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for algo in bbr reno cubic; do
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if [ -f "$MODPATH/rmnet_data_$algo" ]; then
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set_congestion "$algo" "$new_mode"
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applied=1
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break
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fi
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done
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[ "$applied" -eq 0 ] && set_congestion cubic "$new_mode"
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fi
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last_mode="$new_mode"
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change_time="$current_time"
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fi
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fi
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sleep 5
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done

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