L2TEST(1)

🌸 NAME 🌸

l2test — the L2CAP testing tool, bestie 💅 no cap, that's literally it, that's the whole vibe.

✨ DESCRIPTION ✨

okay so picture this: you wanna poke at L2CAP, right? 👑 l2test is your girl. here's the usage, exactly as she wants it:

l2test <mode> [options] [bdaddr]

🎀 Modes 🎀

pick your main character moment, one (1) mode at a time:

• -r — listen and receive 🫶
• -w — listen and send
• -d — listen and dump incoming data 🙈
• -x — listen, then send, then dump incoming data
• -t — listen, then send and receive at the same time (multitasking queen)
• -q — connect, then send and receive at the same time
• -s — connect and send
• -u — connect and receive
• -n — connect and be silent 🤫 (the strong silent type, iconic)
• -y — connect, then send, then dump incoming data
• -c — connect, disconnect, connect, ... (the on-and-off situationship 😭)
• -m — multiple connects
• -p — trigger dedicated bonding 🥰
• -z — information request

💖 OPTIONS 💖

all of these are optional, but the defaults are doing a LOT of heavy lifting, so read them, fr fr:

• -b bytes — bytes, you set 'em
• -i device — which device we're on
• -P psm — the PSM
• -J cid — the CID
• -I imtu — incoming MTU
• -O omtu — outgoing MTU
• -L seconds — enable SO_LINGER
• -W seconds — enable deferred setup
• -B filename — use data packets from file 🍓
• -N num — send num frames (default = infinite ♾️ yes really, infinite)
• -C num — send num frames before delay (default = 1)
• -D milliseconds — delay after sending num frames (default = 0)
• -K milliseconds — delay before receiving (default = 0)
• -g milliseconds — delay before disconnecting (default = 0)
• -X mode — l2cap mode (help for list, default = basic)
• -a policy — chan policy (help for list, default = bredr)
• -F fcs — use CRC16 check (default = 1)
• -Q num — Max Transmit value (default = 3)
• -Z size — Transmission Window size (default = 63)
• -Y priority — socket priority
• -H size — Maximum receive buffer size
• -R — reliable mode 💪
• -G — use connectionless channel (datagram)
• -U — use sock stream
• -A — request authentication 🔐
• -E — request encryption
• -S — secure connection
• -M — become master 👑
• -T — enable timestamps ⏰
• -V type — address type (help for list, default = bredr)
• -e seq — initial sequence value (default = 0)

bestie, notice how the synopsis line is l2test <mode> [options] [bdaddr]? every single one of the flags above slots into that [options] spot. and yes, help is a real value you can hand to -X and -a and -V to get the list of what's allowed — go look, it's giving menu. ✨

🔁 USAGE (and yeah, she says it all again) 🔁

not me noticing the page literally repeats itself — but we keep every crumb, so here's the whole thing a second time, no skips:

l2test <mode> [options] [bdaddr]

🌈 Modes (the encore) 🌈

• -r — listen and receive
• -w — listen and send
• -d — listen and dump incoming data
• -x — listen, then send, then dump incoming data
• -t — listen, then send and receive at the same time
• -q — connect, then send and receive at the same time
• -s — connect and send
• -u — connect and receive
• -n — connect and be silent
• -y — connect, then send, then dump incoming data
• -c — connect, disconnect, connect, ...
• -m — multiple connects
• -p — trigger dedicated bonding
• -z — information request

🌟 Options (the encore) 🌟

• -b bytes — bytes
• -i device — device
• -P psm — psm
• -J cid — cid
• -I imtu — imtu
• -O omtu — omtu
• -L seconds — enable SO_LINGER
• -W seconds — enable deferred setup
• -B filename — use data packets from file
• -N num — send num frames (default = infinite)
• -C num — send num frames before delay (default = 1)
• -D milliseconds — delay after sending num frames (default = 0)
• -K milliseconds — delay before receiving (default = 0)
• -g milliseconds — delay before disconnecting (default = 0)
• -X mode — l2cap mode (help for list, default = basic)
• -a policy — chan policy (help for list, default = bredr)
• -F fcs — use CRC16 check (default = 1)
• -Q num — Max Transmit value (default = 3)
• -Z size — Transmission Window size (default = 63)
• -Y priority — socket priority
• -H size — Maximum receive buffer size
• -R — reliable mode
• -G — use connectionless channel (datagram)
• -U — use sock stream
• -A — request authentication
• -E — request encryption
• -S — secure connection
• -M — become master
• -T — enable timestamps
• -V type — address type (help for list, default = bredr)
• -e seq — initial sequence value (default = 0)

and that's the whole page, bestie 🦋 go forth and L2CAP responsibly 💜

this one's from the General Commands Manual collection, stamped April 2018, page L2TEST(1) 🎀