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invalid argument in sendto

Posted on 2009-05-07
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Last Modified: 2012-08-13
anyone care to tell me why? code compiles fine but when trying to run the send to gives me an Invalid Argument in the errno
int sock_fd;
 
AARP_Packet* tempAARP = (AARP_Packet*) malloc(sizeof(AARP_Packet));
 
/*how I initialize the aarp_sockaddr port is defined but not shown here*/
bzero((char *)&aarp_sockaddr,sizeof(aarp_sockaddr));
aarp_sockaddr.sin_family = AF_INET;
bcopy(hp->h_addr_list[0], (char *)&aarp_sockaddr.sin_addr,hp->h_length);
aarp_sockaddr.sin_port = htons(port);
 
flag = sendto(sock_fd, (void*)tempAARP, sizeof(AARP_Packet), 0, (struct sockaddr *)&aarp_sockaddr, sizeof(aarp_sockaddr));
			if (flag == -1){
				perror("Error: Sending AARP Packet failed \n");
				close(sock_fd);
				exit(1);
			}

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Question by:kuntilanak
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Expert Comment

by:mrjoltcola
ID: 24331177
Your sample shows sock_fd is never initialized, or opened, so likely sendto is complaining of a bad descriptor.
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Author Comment

by:kuntilanak
ID: 24331216
I actually did, just forgot to put it above
/* create socket */
	sock_fd = socket(PF_INET,SOCK_DGRAM,0);
	if (sock_fd < 0)
	{
		perror("Error: Socket creation failed\n");
		exit(1);
	}

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mrjoltcola earned 500 total points
ID: 24331594
Where is .sin_port initialized and to what value? Your comment is before the bzero() call, so I hope you are setting the port after the bzero?
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Author Comment

by:kuntilanak
ID: 24331679
oh that's the problem.. thanks for pointing that out :)
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