299 lines
6.6 KiB
C
299 lines
6.6 KiB
C
#include "../src/ipc.h"
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// #include "../src/log.h"
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#include "../src/utils.h"
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#include <signal.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <sys/un.h>
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#include <unistd.h>
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#define CLOG_DEBUG(a, ...) LOG_DEBUG (""); LOG_DEBUG("\033[36m" a "\033[00m", #__VA_ARGS__); LOG_DEBUG ("")
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void chomp (char *str, size_t len)
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{
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if (str[len - 1] == '\n') {
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str[len - 1] = '\0';
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}
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if (str[len - 2] == '\n') {
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str[len - 2] = '\0';
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}
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}
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/*
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*
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* TODO:
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* This program is under heavy developement.
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* Still many things to do.
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* NOT READY FOR PRODUCTION.
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*
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Server side:
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1. sock_tcp = tcp socket
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2. ipc_server_init
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3. ipc_add (ipc_server, sock_tcp)
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4. wait_event
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if reading on extra socket
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if reading on sock_tcp
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sock_client = accept
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ipc_add_fd sock_client
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elif
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if socket bind to another (client to service or service to client)
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reading on fd ; writing on related fd
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else
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connection from the client:
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1. client sends service name
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2. ipcd establishes a connection to the service
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3. ack
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else
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lolwat shouldn't happen :(
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elif reading on usual socket
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do something
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**/
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#define SERVICE_NAME "simpletcp"
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struct ipc_ctx *ctx = NULL;
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void handle_disconnection (int fd)
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{
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int delfd;
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delfd = ipc_switching_del (&ctx->switchdb, fd);
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if (delfd >= 0) {
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close (delfd);
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ipc_del_fd (ctx, delfd);
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}
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close (fd);
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ipc_del_fd (ctx, fd);
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// printf ("ctx.switchdb\n");
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ipc_switching_print (&ctx->switchdb);
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}
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void tcp_connection (int fd)
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{
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SECURE_BUFFER_DECLARATION (char, buf, BUFSIZ);
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ssize_t len = recv (fd, buf, BUFSIZ, 0);
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if (len <= 0) {
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handle_disconnection (fd);
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return;
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}
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buf[len] = '\0';
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// XXX: for testing purposes
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chomp (buf, len);
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// TODO: tests
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T_PERROR_Q ((send (fd, "OK", 2, 0) <= 0), "sending a message", EXIT_FAILURE);
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printf ("connection to %s\n", buf);
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struct ipc_error ret = ipc_connection_switched (ctx, buf, fd, NULL);
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if (ret.error_code != IPC_ERROR_NONE) {
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fprintf (stderr, "%s\n", ret.error_message);
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exit (EXIT_FAILURE);
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}
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}
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int accept_new_client (int serverfd)
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{
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SECURE_DECLARATION (struct sockaddr_in, client);
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socklen_t addrlen = 0;
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int sock_fd_client;
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T_PERROR_Q (((sock_fd_client =
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accept (serverfd, (struct sockaddr *)&client, &addrlen)) == -1), "accept new client",
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EXIT_FAILURE);
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// adding a client, for now not switched:
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// tcpd should handle the first message (getting the service name)
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ipc_add_fd (ctx, sock_fd_client);
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return sock_fd_client;
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}
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void main_loop (int argc, char **argv)
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{
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argc = argc; // FIXME: useless
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int serverfd;
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SECURE_DECLARATION (struct sockaddr_in, my_addr);
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socklen_t addrlen;
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// socket factory
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if ((serverfd = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
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perror ("socket");
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return;
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}
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int yes = 1;
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if (setsockopt (serverfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof (int)) == -1) {
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perror ("setsockopt");
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return;
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}
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// init local addr structure and other params
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my_addr.sin_family = AF_INET;
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my_addr.sin_port = htons (atoi (argv[1]));
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my_addr.sin_addr.s_addr = INADDR_ANY;
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addrlen = sizeof (struct sockaddr_in);
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// bind addr structure with socket
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if (bind (serverfd, (struct sockaddr *)&my_addr, addrlen) == -1) {
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perror ("bind");
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return;
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}
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// set the socket in passive mode (only used for accept())
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// and set the list size for pending connection
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if (listen (serverfd, 5) == -1) {
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perror ("listen");
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return;
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}
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SECURE_DECLARATION (struct ipc_event, event);
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ipc_add_fd (ctx, serverfd);
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int cpt = 0;
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int timer = 10000;
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while (1) {
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// ipc_wait_event provides one event at a time
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// warning: event->m is free'ed if not NULL
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ipc_ctx_print (ctx);
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TEST_IPC_WAIT_EVENT_Q (ipc_wait_event (ctx, &event, &timer), EXIT_FAILURE);
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switch (event.type) {
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case IPC_EVENT_TYPE_TIMER:{
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printf ("timed out!\n");
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timer = 10000;
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}
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break;
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case IPC_EVENT_TYPE_SWITCH:{
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printf ("switch happened, from %d\n", event.origin);
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}
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break;
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case IPC_EVENT_TYPE_EXTRA_SOCKET:
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{
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// NEW CLIENT
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if (event.origin == serverfd) {
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int sock_fd_client = accept_new_client (serverfd);
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cpt++;
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printf ("TCP connection: %d ctx connected\n", cpt);
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printf ("new TCP client has the fd %d\n", sock_fd_client);
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}
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// CLIENT IS TALKING
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else {
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// Test: if the socket already is in the switch, this means we can just switch the packet.
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// Is the socket in the switch db?
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tcp_connection (event.origin);
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}
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}
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break;
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case IPC_EVENT_TYPE_CONNECTION:
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{
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cpt++;
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printf ("connection: %d ctx connected\n", cpt);
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printf ("new client has the fd %d\n", event.origin);
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};
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break;
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case IPC_EVENT_TYPE_DISCONNECTION:
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{
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cpt--;
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printf ("disconnection: %d ctx remaining\n", cpt);
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};
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break;
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case IPC_EVENT_TYPE_MESSAGE:
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{
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struct ipc_message *m = event.m;
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if (m->length > 0) {
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printf ("message received (type %d): %.*s\n", m->type, m->length, m->payload);
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}
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// m->fd = 3;
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TEST_IPC_P (ipc_write (ctx, m), "server write");
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};
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break;
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case IPC_EVENT_TYPE_TX:
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{
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printf ("a message was sent\n");
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}
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break;
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case IPC_EVENT_TYPE_ERROR:
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fprintf (stderr, "a problem happened with client %d\n", event.origin);
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break;
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default:
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fprintf (stderr, "there must be a problem, event not set: %d\n", event.type);
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exit(1);
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}
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}
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// should never go there
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exit (EXIT_FAILURE);
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}
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void exit_program (int signal)
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{
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printf ("Quitting, signal: %d\n", signal);
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// Close then free remaining ctx.
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ipc_close_all (ctx);
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ipc_ctx_free (ctx);
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// free, free everything!
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free (ctx);
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exit (EXIT_SUCCESS);
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}
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/*
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* service ping-pong: send back everything sent by the ctx
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* stop the program on SIG{TERM,INT,ALRM,USR{1,2},HUP} signals
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*/
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int main (int argc, char *argv[])
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{
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// check the number of args on command line
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if (argc != 2) {
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printf ("USAGE: %s port_num\n", argv[0]);
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exit (EXIT_FAILURE);
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}
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printf ("pid = %d\n", getpid ());
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ctx = malloc (sizeof (struct ipc_ctx));
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memset(ctx, 0, sizeof (struct ipc_ctx));
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struct ipc_error ret = ipc_server_init (ctx, SERVICE_NAME);
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if (ret.error_code != IPC_ERROR_NONE) {
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fprintf (stderr, "%s\n", ret.error_message);
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return EXIT_FAILURE;
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}
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printf ("Listening on [%s].\n", ctx->cinfos[0].spath);
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printf ("MAIN: server created\n");
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signal (SIGHUP , exit_program);
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signal (SIGALRM , exit_program);
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signal (SIGUSR1 , exit_program);
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signal (SIGUSR2 , exit_program);
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signal (SIGTERM , exit_program);
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signal (SIGINT , exit_program);
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// the service will loop until the end of time, or a signal
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main_loop (argc, argv);
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// main_loop should not return
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return EXIT_FAILURE;
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}
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