luaposix 33.2.1

• Index

Examples

• curses.lua
• dir.lua
• fork.lua
• fork2.lua
• getopt.lua
• glob.lua
• limit.lua
• lock.lua
• netlink-uevent.lua
• ping.lua
• poll.lua
• rt_sched.lua
• signal.lua
• socket.lua
• termios.lua
• tree.lua

Modules

• posix
• posix.bit32
• posix.ctype
• posix.curses
• posix.dirent
• posix.errno
• posix.fcntl
• posix.fnmatch
• posix.getopt
• posix.glob
• posix.grp
• posix.libgen
• posix.poll
• posix.pwd
• posix.sched
• posix.signal
• posix.stdio
• posix.stdlib
• posix.sys.msg
• posix.sys.resource
• posix.sys.socket
• posix.sys.stat
• posix.sys.statvfs
• posix.sys.time
• posix.sys.times
• posix.sys.utsname
• posix.sys.wait
• posix.syslog
• posix.termio
• posix.time
• posix.unistd
• posix.utime

Classes

• posix.curses.chstr
• posix.curses.window

ping.lua

local p = require "posix"

if p.SOCK_RAW and p.SO_BINDTODEVICE then
	-- Open raw socket

	local fd, err = p.socket(p.AF_INET, p.SOCK_RAW, p.IPPROTO_ICMP)
	assert(fd, err)

	-- Optionally, bind to specific device

	local ok, err = p.setsockopt(fd, p.SOL_SOCKET, p.SO_BINDTODEVICE, "wlan0")
	assert(ok, err)

	-- Create raw ICMP echo (ping) message

	local data = string.char(0x08, 0x00, 0x89, 0x98, 0x6e, 0x63, 0x00, 0x04, 0x00)

	-- Send message

	local ok, err = p.sendto(fd, data, { family = p.AF_INET, addr = "8.8.8.8", port = 0 })
	assert(ok, err)

	-- Read reply

	local data, sa = p.recvfrom(fd, 1024)
	assert(data, sa)

	if data then
		print("Received ICMP message from " .. sa.addr)
	end
end