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  • Status: Solved
  • Priority: Medium
  • Security: Public
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invalid argument in sendto

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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kuntilanak
Asked:
kuntilanak
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1 Solution
 
mrjoltcolaCommented:
Your sample shows sock_fd is never initialized, or opened, so likely sendto is complaining of a bad descriptor.
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kuntilanakAuthor Commented:
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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mrjoltcolaCommented:
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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kuntilanakAuthor Commented:
oh that's the problem.. thanks for pointing that out :)
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