[ECOS] assign IP address to a specifig mac

[ECOS] assign IP address to a specifig mac

[mkhoyila]

can someone guide me on how to assign an IP address to a mac address from
eCos ethernet driver? If so, is there a sample code I can look at. thanks.

Michael


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Re: [ECOS] assign IP address to a specifig mac

[Gary Thomas]

On Mon, 2005-08-01 at 14:07 -0700, mkhoyila@uci.edu wrote:
> can someone guide me on how to assign an IP address to a mac address from
> eCos ethernet driver? If so, is there a sample code I can look at. thanks.

It's unclear exactly what you mean here.

* Are you looking for a way to force the IP that a particular
  interface uses (within an eCos application)?

  This is done using the CDL, selecting a fixed IP instead
  of using DHCP or BOOTP.

* Perhaps you want for force the association between some external
  device's address (ESA) and a particular IP address.  

  This is normally discovered via ARP (Address Resolution Protocol).
  It is possible to push such a relationship directly into the
  stack, but it's messy and I'm not sure why you would ever want
  to do so.

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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Re: [ECOS] assign IP address to a specifig mac

[Gary Thomas]

Please copy your replies to the eCos mailing list.  Private support
is only available with a support contract.

On Mon, 2005-08-01 at 16:46 -0700, mkhoyila@uci.edu wrote:
> Sorry I did not provide enough info.
> 
> 1) I have a DSL modem and I want to use eCos as embededed RTOS.
> 
> 2) I have written an Ethernet drive for it under eCos and now I want to
> assign a static IP to it (eth0 and eth1). I am using third party boot
> loader to load eCos. I can see it is loading eCos and runs my "hello
> world" applicaiton.
> 
> [cyg_net_init] Init: loopattach(0x00000000)
> [cyg_net_init] Init: ifinit(0x00000000)
> [cyg_net_init] Init: domaininit(0x00000000)
> [cyg_net_init] Init: cyg_net_add_domain(0x8004d638)
> New domain internet at 0x00000000
> [cyg_net_init] Init: cyg_net_add_domain(0x8004d0e0)
> New domain route at 0x00000000
> [cyg_net_init] Init: cyg_route_init(0x00000000)
> [cyg_net_init] Done
> 
> 3) once I can send and receie packets, I am going to do some benchmarks to
> test the eCos performace.
> 
> Right now I need to assign an IP address to my eth0 so I can at least ping
> it and later create a bridge between two to send and receive packets.
> Thanks.

Why can't you use DHCP to get the IP address?

If you must use a fixed IP, then try settings like these:

cdl_component CYGPKG_NET_DHCP {
    user_value 0
};

cdl_component CYGHWR_NET_DRIVER_ETH0_MANUAL {
    user_value 0
};

cdl_component CYGHWR_NET_DRIVER_ETH0_BOOTP {
    user_value 0
};

cdl_component CYGHWR_NET_DRIVER_ETH0_ADDRS {
    user_value 1
};

cdl_option CYGHWR_NET_DRIVER_ETH0_ADDRS_IP {
    user_value 192.168.1.169
};

cdl_option CYGHWR_NET_DRIVER_ETH0_ADDRS_NETMASK {
    user_value 255.255.255.0
};

cdl_option CYGHWR_NET_DRIVER_ETH0_ADDRS_BROADCAST {
    user_value 192.168.1.255
};

cdl_option CYGHWR_NET_DRIVER_ETH0_ADDRS_SERVER {
    user_value 192.168.1.101
};

> 
> > On Mon, 2005-08-01 at 14:07 -0700, mkhoyila@uci.edu wrote:
> >> can someone guide me on how to assign an IP address to a mac address
> >> from
> >> eCos ethernet driver? If so, is there a sample code I can look at.
> >> thanks.
> >
> > It's unclear exactly what you mean here.
> >
> > * Are you looking for a way to force the IP that a particular
> >   interface uses (within an eCos application)?
> >
> >   This is done using the CDL, selecting a fixed IP instead
> >   of using DHCP or BOOTP.
> >
> > * Perhaps you want for force the association between some external
> >   device's address (ESA) and a particular IP address.
> >
> >   This is normally discovered via ARP (Address Resolution Protocol).
> >   It is possible to push such a relationship directly into the
> >   stack, but it's messy and I'm not sure why you would ever want
> >   to do so.
> >
> > --
> > ------------------------------------------------------------
> > Gary Thomas                 |  Consulting for the
> > MLB Associates              |    Embedded world
> > ------------------------------------------------------------
> >
> 
-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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Re: [ECOS] assign IP address to a specifig mac

[Sébastien Couret]

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Hi,

May be it's not solving your issue but I can propose you a sample code that can change the MAC address annd IPv4 address for a specific network interface . This code is working well with the FreeBSP TCP/IP stack ported on eCOS and with ethernet devices/drivers that accept changing their MAC adress trough iotcl calls.
The code was originaly written in french, I have translate it quickly without compiling so please forgive my mistakes if any. 

You could use the API  like this :
char mac[ETHER_ADDR_LEN]={0xDE,0xAD,0x00,0xBE,0xEF,0x00};
IP_SetMAC("eth0",mac);           // Will set MAC adress of eth0 interface to DE:AD:00:BE:EF:00 
IP_SetIP("eth0","192.168.0.1");  // Will set the IPv4 adress of eth0 interface to 192.168.0.1

 -----------------------------------------------------
Here comes the code :
 
Note: My own defines :

 #define MACSTRING 18
 

char* ether_print(const u_char cp[ETHER_ADDR_LEN], char *etheraddr,const unsigned int len)
{
 snprintf(etheraddr,len,"%02x:%02x:%02x:%02x:%02x:%02x",cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]);
 return(etheraddr);
}

int IP_SetMAC(const char* interface,unsigned char mac[ETHER_ADDR_LEN])
{
 int test_sock=0;			// Socket PF_INET/SOCK_DGRAM
 unsigned char i=0;
 struct ifreq ifr;
 unsigned char display[MACSTRING];

 test_sock = socket( PF_INET, SOCK_DGRAM, 0 );
 if( test_sock == -1 )
 {
  diag_printf("Cannot obtain socket");
  return (-1);
 }

 memset(&ifr,0,sizeof( struct ifreq ) );
 strncpy(ifr.ifr_name,interface,IFNAMSIZ);
 for (i=0;i<ETHER_ADDR_LEN;i++)
  ifr.ifr_hwaddr.sa_data[i]=mac[i];
 ether_print(mac,display,MACSTRING);
 if( ioctl( test_sock, SIOCSIFHWADDR, &ifr ) == -1 )
 {
  diag_printf("Cannot set MAC adress for '%s' to '%s' because '%s'",interface,display,strerror(errno));
  close(test_sock);
  return (-1);
 }
 else diag_printf("MAC Adress for '%s' set to %s'",interface,display);
 close(test_sock);
 return(0);
}

int IP_SetIP(const char* interface,const char * adresse)
{
 int test_sock=0;
 struct sockaddr_in* addr=NULL;
 struct ifreq ifr;


 test_sock = socket( PF_INET, SOCK_DGRAM, 0 );
 if( test_sock == -1 )
 {
  fprintf(stderr,"Cannot obtain socket");
  return (-1);
 }

 memset(&ifr,0,sizeof( struct ifreq ) );
 strncpy(ifr.ifr_name,interface,IFNAMSIZ);

 if( ioctl( test_sock, SIOCGIFADDR, &ifr ) == -1 )
 {
  diag_printf("Cannot obtain IP address of '%s' because '%s'",interface,strerror(errno));
 }
 else
 {
  if( ioctl( test_sock, SIOCDIFADDR, &ifr ) != 0 )
  {
   diag_printf("Cannot suppress old IP for '%s' because '%s'",interface,strerror(errno));
  }
 }

 memset( &ifr, 0, sizeof( struct ifreq ) );
 addr= (struct sockaddr_in *)&(ifr.ifr_addr);
 memset(addr, 0, sizeof( struct sockaddr_in) );
 addr->sin_len=sizeof(struct sockaddr_in);
 addr->sin_family=AF_INET;
 addr->sin_addr.s_addr=inet_addr(adresse);
 strncpy(ifr.ifr_name,interface,IFNAMSIZ);

 if( ioctl( test_sock, SIOCSIFADDR, &ifr ) != 0 )
 {
  diag_printf("Cannot set IP address of '%s' to '%s' because '%s'",interface,adresse,strerror(errno));
  close(test_sock);
  return (-1);
 }
 else diag_printf("IP address for '%s' set '%s' ",interface,inet_ntoa(addr->sin_addr));
 close(test_sock);
 return(0);
}

Note : I have used the following headers files , they are not all necessary as my original file was doing more work like changing routes and ARP entries.Anyway, I hope this helps.

#include <cyg/kernel/kapi.h>
#include <pkgconf/system.h>
#include <network.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#ifdef CYGPKG_NET_FREEBSD_SYSCTL
#include <sys/sysctl.h>
#endif
#include <sys/param.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <net/ethernet.h>
#include <netinet/if_ether.h>
#include <netinet/in.h>


On Mon, 1 Aug 2005 14:07:51 -0700 (PDT)
mkhoyila@uci.edu wrote:

> can someone guide me on how to assign an IP address to a mac address from
> eCos ethernet driver? If so, is there a sample code I can look at. thanks.
> 
> Michael
> 
> 
> -- 
> Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
> and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
> 
> 


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