How to write the code of LAN remote boot software
This article mainly explains "how to write the code of LAN remote boot software". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Next let the editor to take you to learn "how to write LAN remote boot software production code"!
The code is as follows:
/ *
> File Name: wake_up.c
> Author: wz
> Created Time: Fri 15 Nov 2013 03:42:47 PM CST
* * /
# include
# include
# include
# include
# include
# include
# include
Void get_mac (char * argv,unsigned char * save_mac)
{
Int j = 0
Int num_x = 0mm numb first = 1
While (* argv! = 0)
{
If (* argv! =':')
{
If (isdigit (* argv) & & first)
{
Num_x = (* argv -'0') * 16
First = 0
Argv++
Continue
}
If (first & & isalpha (* argv))
{
Num_x = (10 + (* argv -'a')) * 16
First = 0
Argv++
Continue
}
If (! first & & isdigit (* argv))
{
Num_x = num_x+ (* argv -'0')
First = 1
Argv++
Continue
}
If (! first & & isalpha (* argv))
{
Num_x = num_x + (10 + (* argv -'a'))
First = 1
Argv++
Continue
}
}
Else
{
Save_ Mac [j] = num_x
Num_x = 0
Argv++
Jacks +
}
}
Save_ Mac [j] = num_x
}
Int main (int argc,char * argv [])
{
Int sockfd,i,j,on = 1BI n
Unsigned char packet [120]
Unsigned char save_mac [120]
Struct sockaddr_in to
If (argc < 2)
{
Fprintf (stderr, "usage: program name + target host physical address")
Return 1
}
Get_mac (argv [1], save_mac)
/ / build magic packet
For (I = 0; I < 6; iTunes +)
{
Packet [I] = 0xff
}
For (I = 1; I < 17; iTunes +)
{
Memcpy (packet+i*6,save_mac,6)
}
Sockfd = socket (AF_INET,SOCK_DGRAM,0)
Setsockopt (sockfd,SOL_SOCKET,SO_BROADCAST,&on,sizeof (on))
If (socket < 0)
{
Fprintf (stderr, "socket creation error\ n")
Return 1
}
Memset ((void *) & to,0,sizeof (to))
To.sin_family = AF_INET
To.sin_port = htons (30000)
To.sin_addr.s_addr = inet_addr ("125.217.40.255")
N = sendto (sockfd,packet,sizeof (packet), 0, (struct sockaddr *) & to,sizeof (to))
If (n)
