AW: [En-Nut-Discussion] Problem to send data with an UDP socket

[Ernst Stippl]

Hi Julien!

Here is a code snippet  which works for me:

u_char send_snmp (u_long remoteaddr, u_char len)
{
UDPSOCKET *udp_sock;
u_short    remoteport;
u_long    *pRemoteaddr;
u_short   *pRemoteport;
u_short    writelen;
u_short    readlen;
u_long     timeout;
u_short    localport;
u_short    r;
u_char    *resultstring; 

remoteport = 161;

writelen = len;
timeout = 10000;
pRemoteaddr = &remoteaddr;
pRemoteport = &remoteport;
readlen = 0;                    
localport = 0;

udp_sock = NutUdpCreateSocket(localport);    // create socket
if (udp_sock != 0) 
   IF_LOG_SNMP printf("SNMP: UDP Socket port %d\n",
udp_sock->so_local_port);   

   
//  SNMP request Send an UDP datagram.     
     
r = NutUdpSendTo ( udp_sock, remoteaddr, remoteport, SNMP_buff, writelen); 
.....

I use this to create the udp packets to carry snmp requests, and it works.
Make sure the IP connection is active by pinging the Ethernut and use a
program like Ethereal to trace whats on the wire. 

hope this helps

ernst

-----Ursprüngliche Nachricht-----
Von: en-nut-discussion-bounces at egnite.de
[mailto:en-nut-discussion-bounces at egnite.de] Im Auftrag von Julien CHAUSSEC
Gesendet: Dienstag, 05. Juli 2005 11:40
An: en-nut-discussion at egnite.de
Betreff: [En-Nut-Discussion] Problem to send data with an UDP socket

Hi everybody,

When i want to send data, with the function  NutUdpSendTo(), the returned
data (rt) is -1. I use avr gcc. All the functions called before are OK. Sock
gives the value 2934 and rc gives 0 the first and the second time.
There is enough memory availiable (NutHeapAvailable() ).

Here is the code i use:
int rc = NutRegisterDevice(&DEV_ETHER, 0x8300, 5); u_long ip_addr =
inet_addr(STDNET_IPADDR); u_long ip_mask = inet_addr(STDNET_IPMASK); rc =
NutNetIfConfig("eth0", null_mac, ip_addr,ip_mask);

UDPSOCKET *sock;
sock = NutUdpCreateSocket(10999);
printf("nombre d'octets disponible=%d\n\r", mem);

char tab [50];
int rt;
for (;;)
	{
	rt = NutUdpSendTo(sock, inet_addr("134.246.255.255"),
13020,tab,strlen(tab));
	NutSleep(1000);
     	}
}

Does anyone have an idea?
Thank you.

Julien.Chaussec at ifremer.fr

_______________________________________________
En-Nut-Discussion mailing list
En-Nut-Discussion at egnite.de
http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion