int
hostname_to_entry(bcast_t* bcast, char* hostname) {
network_address_t addr;
unsigned int ipaddr;
int entry = -1;
int i;
if (hostname == NULL)
return bcast->me;
if (network_translate_hostname(hostname, addr) != 0) {
kprintf("Error: could not resolve host name.\n");
AbortOnCondition(1,"Crashing.");
}
ipaddr = addr[0];
for (i=0; i<bcast->n_entries; i++)
if (ipaddr == bcast->entries[i].addr[0])
entry = i;
AbortOnCondition(entry == -1,
"Error: host name not in broadcast table.");
return entry;
}
int transmit(int* arg) {
char buffer[BUFFER_SIZE];
int length;
int i;
network_address_t addr;
miniport_t port;
miniport_t dest;
AbortOnCondition(network_translate_hostname(hostname, addr) < 0,
"Could not resolve hostname, exiting.");
port = miniport_local_create(0);
dest = miniport_remote_create(addr, 0);
for (i=0; i<MAX_COUNT; i++) {
printf("Sending packet %d.\n", i+1);
sprintf(buffer, "Count is %d.\n", i+1);
length = strlen(buffer) + 1;
minimsg_send(port, dest, buffer, length);
}
miniport_destroy(port);
return 0;
}
void
network_get_my_address(network_address_t my_address) {
char hostname[64];
assert(gethostname(hostname, 64) == 0);
network_translate_hostname(hostname, my_address);
my_address[1] = htons(my_udp_port);
}
static int
receiver(int* arg)
{
int len;
char buffer[BUFFER_SIZE];
network_address_t dest;
if (NULL != remote_name) {
network_translate_hostname(remote_name, dest);
connection = minisocket_client_create(dest, port_num, &error);
} else {
connection = minisocket_server_create(port_num, &error);
}
if (NULL == connection) {
printf("Connection error.\n");
return -1;
} else {
minithread_fork(sender, NULL);
printf("Connection successful. Type and enter to send messages.\n");
}
while (1) {
buffer[BUFFER_SIZE] = '\0';
len = minisocket_receive(connection, buffer, BUFFER_SIZE - 1, &error);
buffer[len] = '\0';
printf("[Received message]: %s", buffer);
}
return 0;
}
int
transmit1(int* arg) {
char buffer[BUFFER_SIZE];
int length;
int i;
network_address_t addr;
miniport_t port;
miniport_t dest;
AbortOnCondition(network_translate_hostname(hostname, addr) < 0,
"Could not resolve hostname, exiting.");
port = miniport_create_unbound(0);
dest = miniport_create_bound(addr, 1);
for (i=MAX_COUNT/2; i<MAX_COUNT; i++) {
printf("Sending packet %d.\n", i+1);
sprintf(buffer, "Count is %d.\n", i+1);
length = strlen(buffer) + 1;
minimsg_send(port, dest, buffer, length);
minithread_yield();
}
return 0;
}
int transmit_first(int* arg) {
char buffer[BUFFER_SIZE];
int length = BUFFER_SIZE;
int i;
network_address_t addr;
miniport_t port;
miniport_t dest;
miniport_t from;
AbortOnCondition(network_translate_hostname(hostname, addr) < 0,
"Could not resolve hostname, exiting.");
port = miniport_create_unbound(0);
dest = miniport_create_bound(addr, 1);
for (i=0; i<MAX_COUNT; i++) {
printf("Sending packet %d.\n", i+1);
sprintf(buffer, "Received packet %d.\n", i+1);
length = strlen(buffer) + 1;
minimsg_send(port, dest, buffer, length);
length = BUFFER_SIZE;
minimsg_receive(port, &from, buffer, &length);
printf("%s", buffer);
miniport_destroy(from);
}
return 0;
}
int transmit_first(int* arg)
{
char buffer[MINIMSG_MAX_MSG_SIZE + 10];
int length = 0;
int i;
network_address_t hostaddr, targetaddr;
miniport_t port;
miniport_t dest;
struct mini_header hdr;
AbortOnCondition(network_translate_hostname(hostname, targetaddr) < 0,
"Could not resolve hostname, exiting.");
port = miniport_create_unbound(0);
dest = miniport_create_bound(targetaddr, 1);
/* Form correct header */
network_get_my_address(hostaddr);
hdr.protocol = PROTOCOL_MINIDATAGRAM;
pack_address(hdr.source_address, hostaddr);
pack_unsigned_short(hdr.source_port, port->num);
pack_address(hdr.destination_address, dest->bound.addr);
pack_unsigned_short(hdr.destination_port, dest->bound.remote);
/* Send packages with short but correct header and zero data */
printf("Sending packages with short headers.\n");
sprintf(buffer, "Receiving packages with short headers.\n");
length = strlen(buffer) + 1;
minimsg_send(port, dest, buffer, length);
for (i = 0; i < MINIMSG_HDRSIZE; i++)
network_send_pkt(targetaddr, i, (char*)&hdr, 0, buffer);
/* Send packages to wrong ports */
printf("Sending packages to wrong destination ports.\n");
sprintf(buffer, "Receiving packages with wrong destination ports.\n");
length = strlen(buffer) + 1;
minimsg_send(port, dest, buffer, length);
sprintf(buffer, "This message is sent to a wrong port.\n");
length = strlen(buffer) + 1;
minimsg_send(port, miniport_create_bound(targetaddr, 0),
buffer, length);
minimsg_send(port, miniport_create_bound(targetaddr, MAX_UNBOUNDED),
buffer, length);
minimsg_send(port, miniport_create_bound(targetaddr, MAX_UNBOUNDED + 1),
buffer, length);
minimsg_send(port, miniport_create_bound(targetaddr, MIN_BOUNDED),
buffer, length);
minimsg_send(port, miniport_create_bound(targetaddr, MAX_BOUNDED),
buffer, length);
printf("Send-first finished.\n");
return 0;
}
void
network_get_my_address(network_address_t my_address) {
char hostname[64];
assert(gethostname(hostname, 64) == 0);
network_translate_hostname(hostname, my_address);
/*
network_translate_hostname("localhost", my_address);
my_address[1] = (long) htons(my_udp_port);
*/
}
int client(int* arg)
{
int i;
minisocket_error error;
network_address_t address;
network_translate_hostname(hostname, address);
recv_skt = minisocket_client_create(address, port, &error);
for (i=0; i<THREAD_COUNTER; i++) {
minithread_fork(receiver,&thread_id[i]);
}
return 0;
}
void
bcast_initialize(char* configfile, bcast_t* bcast) {
FILE* config = fopen(configfile, "r");
char line[BCAST_MAX_LINE_LEN];
int i = 0;
char* rv;
network_address_t my_addr;
unsigned int my_ip_addr;
network_get_my_address(my_addr);
my_ip_addr = my_addr[0];
while ((rv = fgets(line, BCAST_MAX_LINE_LEN, config)) != NULL) {
if (line[0] == '\r' || line[0] == '\n')
break;
line[strlen(line)-1] = '\0';
strcpy(bcast->entries[i].name, line);
bcast->entries[i].n_links = 0;
if (network_translate_hostname(line, bcast->entries[i].addr) != 0) {
kprintf("Error: could not resolve hostname %s.\n", line);
AbortOnCondition(1,"Crashing.");
}
if (bcast->entries[i].addr[0] == my_ip_addr)
bcast->me = i;
i++;
}
bcast->n_entries = i;
if (rv != NULL)
for (i=0; i<bcast->n_entries; i++) {
//int len;
int j;
AbortOnCondition(fgets(line, BCAST_MAX_LINE_LEN, config) == NULL,
"Error: incomplete adjacency matrix.");
//len = strlen(line);
for (j=0; j<bcast->n_entries; j++)
if (i == j)
; /* avoid self-links */
else if (line[j] != '.') {
bcast->entries[i].links[bcast->entries[i].n_links] = j;
bcast->entries[i].n_links++;
}
}
fclose(config);
}
int client(int* arg) {
network_address_t address;
minisocket_t socket;
minisocket_error error;
char msg[strlen("hello\n") + 1];
network_translate_hostname(hostname, address);
/* create a network connection to the local machine */
socket = minisocket_client_create(address, port,&error);
printf("made a client\n");
minisocket_receive(socket, msg, strlen("hello\n")+1, &error);
return 0;
}
int client(int* arg) {
char buffer[BUFFER_SIZE];
int i;
int bytes_received;
network_address_t address;
minisocket_t socket;
minisocket_error error;
network_translate_hostname(hostname, address);
/* create a network connection to the local machine */
socket = minisocket_client_create(address, port,&error);
if (socket==NULL){
printf("ERROR: %s. Exiting. \n",GetErrorDescription(error));
return -1;
}
/* receive the message */
bytes_received=0;
while (bytes_received!=BUFFER_SIZE){
int received_bytes;
if ( (received_bytes=minisocket_receive(socket,buffer,BUFFER_SIZE-bytes_received, &error))==-1){
printf("ERROR: %s. Exiting. \n",GetErrorDescription(error));
/* close the connection */
minisocket_close(socket);
return -1;
}
/* test the information received */
for (i=0; i<received_bytes; i++){
if (buffer[i]!=(char)( (bytes_received+i)%256 )){
printf("The %d'th byte received is wrong.\n",
bytes_received+i);
/* close the connection */
minisocket_close(socket);
return -1;
}
}
bytes_received+=received_bytes;
}
printf("All bytes received correctly.\n");
minisocket_close(socket);
return 0;
}
int client(int* arg) {
int port;
network_address_t address;
minisocket_t socket;
minisocket_error error;
port = *arg;
network_translate_hostname(hostname, address);
socket = minisocket_client_create(address, port, &error);
if (socket==NULL){
printf("ERROR: %s. Exiting. \n",GetErrorDescription(error));
return -1;
}
printf("Client connected on port %i\n", port);
minisocket_close(socket);
return 0;
}
int
transmit(int* arg) {
char buffer[BUFFER_SIZE];
int length;
network_address_t addr;
miniport_t port;
miniport_t dest;
AbortOnCondition(network_translate_hostname(hostname, addr) < 0,
"Could not resolve hostname, exiting.");
port = miniport_create_unbound(42);
dest = miniport_create_bound(addr, 42);
minithread_fork(receive, NULL);
while(1){
memset(buffer, 0, BUFFER_SIZE);
length = miniterm_read(buffer, BUFFER_SIZE);
minimsg_send(port, dest, buffer, length);
}
return 0;
}
int
network_initialize(interrupt_handler_t network_handler) {
int arg = 1;
/* initialise the NT socket library, inexplicably required by NT */
assert(WSAStartup(MAKEWORD(2, 0), &winsock_version_data) == 0);
if (atomic_test_and_set(&initialized)) {
return -1;
}
memset(&if_info, 0, sizeof(if_info));
if_info.sock = socket(PF_INET, SOCK_DGRAM, 0);
if (if_info.sock < 0) {
perror("socket");
return -1;
}
if_info.sin.sin_family = SOCK_DGRAM;
if_info.sin.sin_addr.s_addr = htonl(0);
if_info.sin.sin_port = htons(my_udp_port);
if (bind(if_info.sock, (struct sockaddr *) &if_info.sin,
sizeof(if_info.sin)) < 0) {
/* kprintf("Error: code %ld.\n", GetLastError());*/
AbortOnError(0);
perror("bind");
return -1;
}
/* set for fast reuse */
assert(setsockopt(if_info.sock, SOL_SOCKET, SO_REUSEADDR,
(char *) &arg, sizeof(int)) == 0);
if (BCAST_ENABLED){
if (BCAST_USE_TOPOLOGY_FILE){
bcast_initialize(BCAST_TOPOLOGY_FILE, &topology);
} else {
assert(setsockopt(if_info.sock, SOL_SOCKET, SO_BROADCAST,
(char *) &arg, sizeof(int)) == 0);
network_translate_hostname(BCAST_ADDRESS,broadcast_addr);
}
}
/*
* Print network information on the screen (mostly for Joranda).
*/
{
network_address_t my_address;
char my_hostname[256];
network_get_my_address(my_address);
network_format_address(my_address, my_hostname, 256);
kprintf("Hostname of local machine: %s.\n",my_hostname);
}
/*
* Interrupts are handled through the caller's handler.
*/
start_network_poll(network_handler, &if_info.sock);
return 0;
}
