int
sys_read(struct tcb *tcp)
{
struct socket_info sockinfo;
if (entering(tcp)) {
json_object_object_add(tcp->json, "fd", json_object_new_int((int)tcp->u_arg[0]));
printfd(tcp, tcp->u_arg[0]);
tprintf(", ");
if (output_json) {
if (get_socket_info(tcp->pid, (int) tcp->u_arg[0], &sockinfo) == 0) {
append_to_json(tcp->json, &sockinfo);
} else {
json_object_object_add(tcp->json, "pid", json_object_new_int(tcp->pid));
}
}
} else {
/* exiting... */
if (syserror(tcp)) {
tprintf("%#lx", tcp->u_arg[1]);
} else {
/* no error */
if (output_json) {
json_object_object_add(tcp->json, "content",
json_object_new_string(readstr(tcp, tcp->u_arg[1], tcp->u_arg[2])));
json_object_object_add(tcp->json, "length", json_object_new_int(tcp->u_arg[2]));
} else {
printstr(tcp, tcp->u_arg[1], tcp->u_rval);
}
}
tprintf(", %lu", tcp->u_arg[2]);
}
return 0;
}
void* start_tcp_listener(void* socket_arg) {
int socket_fd = (int)socket_arg;
int listen_port = 3600;
int connection_fd;
struct sockaddr_in socket_info;
/* Create the socket info */
if(!get_socket_info(NULL, listen_port, &socket_info)) {
fprintf(stderr, "Failure getting socket info");
exit(EXIT_FAILURE);
}
/* Bind */
if(bind(socket_fd, (struct sockaddr*)&socket_info, sizeof(socket_info))) {
fprintf(stderr, "Binding failed.");
close(socket_fd);
exit(EXIT_FAILURE);
}
/* Listen */
errno = 0;
if(listen(socket_fd, 10) == -1) {
fprintf(stderr, "Listening on device Failed. Error: %s\n", strerror(errno));
close(socket_fd);
exit(EXIT_FAILURE);
}
/* Accept connections, and spawn new threads for each connection */
while(1) {
/* Accept */
if((connection_fd = accept(socket_fd, NULL, NULL)) <= 0) {
fprintf(stderr, "Accept failed. Error Code: %d", connection_fd);
close(socket_fd);
exit(EXIT_FAILURE);
}
void* packet_struct;
uint16_t pack_type = read_packet(connection_fd, &packet_struct);
struct leave_packet* deser_pack = (struct leave_packet*) packet_struct;
assert(pack_type == pack.head.packet_type);
assert(pack.local.ip == deser_pack->local.ip);
assert(pack.local.ip == deser_pack->local.ip);
assert(strncmp(pack.local.mac_addr, deser_pack->local.mac_addr, 6) == 0);
assert(pack.ID == deser_pack->ID);
printf("shit passed");
}
}
int
sys_write(struct tcb *tcp)
{
struct socket_info sockinfo;
if (entering(tcp)) {
if (get_socket_info(tcp->pid, (int) tcp->u_arg[0], &sockinfo) == 0) {
append_to_json(tcp->json, &sockinfo);
} else {
json_object_object_add(tcp->json, "pid", json_object_new_int(tcp->pid));
}
json_object_object_add(tcp->json, "fd", json_object_new_int(tcp->u_arg[0]));
json_object_object_add(tcp->json, "content",
json_object_new_string(readstr(tcp, tcp->u_arg[1], tcp->u_arg[2])));
json_object_object_add(tcp->json, "length", json_object_new_int(tcp->u_arg[2]));
printfd(tcp, tcp->u_arg[0]);
tprintf(", ");
printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
tprintf(", %lu", tcp->u_arg[2]);
}
return 0;
}
/* Connect to a host and port. Client connections
* param host: host either DNS, IPv4, or null for server sockets
* param port: port * return: socket file descriptor for the connect, -1 on error
*/
int connect_to(char* host, int port) {
struct sockaddr_in socket_info;
int socket_fd;
socket_fd = create_socket();
if(socket_fd == -1) {
fprintf(stderr, "Failure creating socket\n");
return -1;
}
/* Create the socket info */
if(get_socket_info(host, port, &socket_info) == -1) {
fprintf(stderr, "Failure getting socket info\n");
return -1;
}
errno = 0;
if(connect(socket_fd,(struct sockaddr *) &socket_info, sizeof(socket_info)) < 0) {
fprintf(stderr, "ERROR connecting. Error: %s\n",strerror(errno));
return -1;
}
return socket_fd;
}
