Socket programming: sendto always fails with errno 22 (EINVAL)

I am always getting no bytes sent, with an errno of 22 (EINVAL, Invalid Argument) with this code. The `destination_host` is set elsewhere and known to be valid, so I really don't see what is going on. `MAXMSGSIZE` is 1000. No errors, or warnings. I am compiling with `-Wall -Werror -pedantic` ``` char *data_rec; u_int data_len; int sockfd; uint16_t *ns; struct sockaddr_in address; struct sockaddr *addr; char *ip; int i; int errno; int bytes_sent; data_len = MAXMSGSIZE; data_rec = malloc(sizeof(char)*MAXMSGSIZE); ns = malloc(MAXMSGSIZE*sizeof(uint16_t)); ip = malloc(MAXMSGSIZE*sizeof(char)); data_rec = "some random test stuff"; sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP); if(sockfd<0) { printf("socket() failed\n"); } inet_ntop(AF_INET,destination_host->h_addr,ip,MAXMSGSIZE); memset(&address, 0, sizeof(address)); address.sin_family = AF_INET; address.sin_port = htons(theirPort); address.sin_addr.s_addr = (unsigned long)ip; addr = (struct sockaddr*)&address; bind(sockfd,addr,sizeof(address)); /*Convert the message to uint16_t*/ for(i=0; i<MAXMSGSIZE; i++) { ns[i] = htons(data_rec[i]); } /* send the message */ bytes_sent = sendto(sockfd, ns, data_len, MSG_DONTWAIT, addr, sizeof(addr)); if(bytes_sent == -1) { printf("Error sending: %i\n",errno); } ```