C++ request_init函数代码示例

        /* 1 - 7 is the range we use for the global modifiers array
         * above */
        assert(mods->modifiers > 0);
        assert(mods->modifiers <= 7);
        assert(mods->modifiers % 2 == 1); /* because we fail odd ones */
        assert(mods->status != Success);
        assert(mods->pad0 == 0);
        assert(mods->pad1 == 0);
    }

    reply_handler = reply_XIPassiveGrabDevice;
}

static void request_XIPassiveGrabDevice(ClientPtr client, xXIPassiveGrabDeviceReq* req, int error, int errval)
{
    int rc;
    int modifiers;

    rc = ProcXIPassiveGrabDevice(&client_request);
    assert(rc == error);

    if (rc != Success)
        assert(client_request.errorValue == errval);

    client_request.swapped = TRUE;
    swaps(&req->length);
    swapl(&req->time);
    swapl(&req->grab_window);
    swapl(&req->cursor);
    swapl(&req->detail);
    swaps(&req->deviceid);
    modifiers = req->num_modifiers;
    swaps(&req->num_modifiers);
    swaps(&req->mask_len);

    while(modifiers--)
    {
        CARD32 *mod = ((CARD32*)(req + 1)) + modifiers;
        swapl(mod);
    }

    rc = SProcXIPassiveGrabDevice(&client_request);
    assert(rc == error);

    if (rc != Success)
        assert(client_request.errorValue == errval);
}

static unsigned char *data[4096]; /* the request buffer */
static void test_XIPassiveGrabDevice(void)
{
    int i;
    xXIPassiveGrabDeviceReq *request = (xXIPassiveGrabDeviceReq*)data;
    unsigned char *mask;

    request_init(request, XIPassiveGrabDevice);

    request->grab_window = CLIENT_WINDOW_ID;

    reply_handler = reply_XIPassiveGrabDevice;
    client_request = init_client(request->length, request);

    printf("Testing invalid device\n");
    request->deviceid = 12;
    request_XIPassiveGrabDevice(&client_request, request, BadDevice, request->deviceid);

    request->deviceid = XIAllMasterDevices;

    printf("Testing invalid grab types\n");
    for (i = XIGrabtypeFocusIn + 1; i < 0xFF; i++)
    {
        request->grab_type = i;
        request_XIPassiveGrabDevice(&client_request, request, BadValue, request->grab_type);
    }

    printf("Testing invalid grab type + detail combinations\n");
    request->grab_type = XIGrabtypeEnter;
    request->detail = 1;
    request_XIPassiveGrabDevice(&client_request, request, BadValue, request->detail);

    request->grab_type = XIGrabtypeFocusIn;
    request_XIPassiveGrabDevice(&client_request, request, BadValue, request->detail);

    request->detail = 0;

    printf("Testing invalid masks\n");
    mask = (unsigned char*)&request[1];

    request->mask_len = bytes_to_int32(XI2LASTEVENT + 1);
    request->length += request->mask_len;
    SetBit(mask, XI2LASTEVENT + 1);
    request_XIPassiveGrabDevice(&client_request, request, BadValue, XI2LASTEVENT + 1);

    ClearBit(mask, XI2LASTEVENT + 1);

    /* tested all special cases now, test a few valid cases */

    /* no modifiers */
    request->deviceid = XIAllDevices;
    request->grab_type = XIGrabtypeButton;
//.........这里部分代码省略.........

static void request_XIQueryDevice(struct test_data *querydata,
                                 int deviceid, int error)
{
    int rc;
    ClientRec client;
    xXIQueryDeviceReq request;

    request_init(&request, XIQueryDevice);
    client = init_client(request.length, &request);
    reply_handler = reply_XIQueryDevice;

    querydata->which_device = deviceid;

    request.deviceid = deviceid;
    rc = ProcXIQueryDevice(&client);
    assert(rc == error);

    if (rc != Success)
        assert(client.errorValue == deviceid);

    reply_handler = reply_XIQueryDevice;

    client.swapped = TRUE;
    swaps(&request.length);
    swaps(&request.deviceid);
    rc = SProcXIQueryDevice(&client);
    assert(rc == error);

    if (rc != Success)
        assert(client.errorValue == deviceid);
}

static int check(char *name, int fd) {
    struct request_info request;

    request_init(&request, RQ_DAEMON, name, RQ_FILE, fd, 0);
    fromhost(&request);
    return hosts_access(&request);
}

bool socket_tcpwrap(int fd, const char *name) {
#ifdef HAVE_LIBWRAP
        struct request_info req;
        union {
                struct sockaddr sa;
                struct sockaddr_in in;
                struct sockaddr_in6 in6;
                struct sockaddr_un un;
                struct sockaddr_storage storage;
        } sa_union;
        socklen_t l = sizeof(sa_union);

        if (getsockname(fd, &sa_union.sa, &l) < 0)
                return true;

        if (sa_union.sa.sa_family != AF_INET &&
            sa_union.sa.sa_family != AF_INET6)
                return true;

        request_init(&req,
                     RQ_DAEMON, name,
                     RQ_FILE, fd,
                     NULL);

        fromhost(&req);

        if (!hosts_access(&req)) {
                log_warning("Connection refused by tcpwrap.");
                return false;
        }

        log_debug("Connection accepted by tcpwrap.");
#endif
        return true;
}

void 
http_accept_request_socket(http_conf_t * conf, int fd) {
	int confd  ;
	struct sockaddr addr;
	struct sockaddr_in addrIn;
	socklen_t addLen = sizeof(struct sockaddr );
	while( (confd =  accept(fd, &addr, &addLen)) && confd > 0) {
		pool_t *p = (pool_t *)pool_create();
		http_connect_t * con;
		epoll_extra_data_t *data_ptr;

		addrIn =  *((struct sockaddr_in *) &addr);
		data_ptr = (epoll_extra_data_t *)palloc(p, sizeof(epoll_extra_data_t));
		con = (http_connect_t *) palloc(p, sizeof(http_connect_t));//换成初始化函数，
		con->p= p;
		con->fd = confd;
		con->in = (request *)request_init(p);
		con->out = (response *)response_init(p);
		/*char *ip  = NULL;
		if(addrIn.sin_addr.s_addr) {
			ip = inet_ntoa(addrIn.sin_addr);
		}

		if(ip) {
			//con->in->clientIp = (string *) string_init_from_str(p, ip, strlen(ip));
		}*/

		con->next_handle = accept_handler;
		data_ptr->type = SOCKFD;
		data_ptr->ptr = (void *) con;
		epoll_add_fd(conf->epfd, confd, EPOLL_R, (void *)data_ptr);//对epoll data结构指向的结构体重新封装，分websit
		//data struct ,  connect  data struct , file data struct ,
	}
}

//=================================================================================================
void eve::dx11::structured_buffer::init(void)
{
	// Call parent class.
	eve::dx11::object::init();

	request_init();
}

EAPI_MAIN int
elm_main(int argc, char **argv) {
	Evas_Object *win = NULL;
	Evas_Object *dayselector = NULL;

	win = elm_win_add(NULL, "dayselector sample", ELM_WIN_BASIC);
	elm_win_title_set(win, "dayselector sample");
	elm_win_autodel_set(win, EINA_TRUE);
	elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);

	dayselector = elm_dayselector_add(win);
	elm_object_text_set(dayselector, "DaySelector!");

	request_init();

	evas_object_smart_callback_add(win, "focus,in", _register_cb, dayselector);

	register_request_listener(EVENT_RESIZE, resize, dayselector);
	register_request_listener(EVENT_SET_DISABLED, set_disabled, dayselector);
	register_request_listener(EVENT_SET_ENABLED, set_enabled, dayselector);
	register_request_listener(EVENT_HIDE, hide, dayselector);
	register_request_listener(EVENT_SHOW, show, dayselector);

	evas_object_resize(win, 380, 80);
	evas_object_resize(dayselector, 120, 40);
	evas_object_move(dayselector, 30, 15);

	evas_object_show(win);
	evas_object_show(dayselector);

	elm_run();
	request_shutdown();
	elm_shutdown();
	return 0;
}

static void test_XIQueryDevice(void)
{
    int i;
    xXIQueryDeviceReq request;
    struct test_data data;

    reply_handler = reply_XIQueryDevice;
    userdata = &data;
    request_init(&request, XIQueryDevice);

    printf("Testing XIAllDevices.\n");
    request_XIQueryDevice(&data, XIAllDevices, Success);
    printf("Testing XIAllMasterDevices.\n");
    request_XIQueryDevice(&data, XIAllMasterDevices, Success);

    printf("Testing existing device ids.\n");
    for (i = 2; i < 6; i++)
        request_XIQueryDevice(&data, i, Success);

    printf("Testing non-existing device ids.\n");
    for (i = 6; i <= 0xFFFF; i++)
        request_XIQueryDevice(&data, i, BadDevice);


    reply_handler = NULL;

}

static gboolean
afsocket_sd_process_connection(AFSocketSourceDriver *self, GSockAddr *client_addr, GSockAddr *local_addr, gint fd)
{
  gchar buf[MAX_SOCKADDR_STRING], buf2[MAX_SOCKADDR_STRING];
#if SYSLOG_NG_ENABLE_TCP_WRAPPER
  if (client_addr && (client_addr->sa.sa_family == AF_INET
#if SYSLOG_NG_ENABLE_IPV6
                   || client_addr->sa.sa_family == AF_INET6
#endif
     ))
    {
      struct request_info req;

      request_init(&req, RQ_DAEMON, "syslog-ng", RQ_FILE, fd, 0);
      fromhost(&req);
      if (hosts_access(&req) == 0)
        {

          msg_error("Syslog connection rejected by tcpd",
                    evt_tag_str("client", g_sockaddr_format(client_addr, buf, sizeof(buf), GSA_FULL)),
                    evt_tag_str("local", g_sockaddr_format(local_addr, buf2, sizeof(buf2), GSA_FULL)),
                    NULL);
          return FALSE;
        }
    }

#endif

  if (self->num_connections >= self->max_connections)
    {
      msg_error("Number of allowed concurrent connections reached, rejecting connection",
                evt_tag_str("client", g_sockaddr_format(client_addr, buf, sizeof(buf), GSA_FULL)),
                evt_tag_str("local", g_sockaddr_format(local_addr, buf2, sizeof(buf2), GSA_FULL)),
                evt_tag_int("max", self->max_connections),
                NULL);
      return FALSE;
    }
  else
    {
      AFSocketSourceConnection *conn;

      conn = afsocket_sc_new(client_addr, fd, self->super.super.super.cfg);
      afsocket_sc_set_owner(conn, self);
      if (log_pipe_init(&conn->super))
        {
          afsocket_sd_add_connection(self, conn);
          self->num_connections++;
          log_pipe_append(&conn->super, &self->super.super.super);
        }
      else
        {
          log_pipe_unref(&conn->super);
          return FALSE;
        }
    }
  return TRUE;
}

cs_request_t cs_parse_request(char *buf)
{
    cs_request_t req;
    request_init(&req);

    if (buf == NULL) {
        E("parameter error.");
        return req;
    }

    char *buf_copy = strdup(buf);
    if (buf_copy == NULL) {
        E("strncup() failed.");
        return req;
    }

    char *str = buf_copy;
    char *token = NULL;
    char *saveptr = NULL;
    int i = 0;
    while (1) {
        token = strtok_r(str, ":", &saveptr);
        if (token == NULL)
            break;

        switch (i) {
            case 0:
                req.req_type = atoi(token);
                break;
            case 1:
                req.name = strdup(token);
                break;
            case 2:
                req.passwd = strdup(token);
                break;
            case 3:
                req.buddy_name = strdup(token);
                break;
            case 4:
                req.content = strdup(token);
                break;
            case 5:
                req.datetime = strdup(token);
                break;
            default:
                DD(i);
                break;
        }

        str = NULL;
        i++;
    }
    //request_dump(&req);

    cs_free(&buf_copy);
    return req;
}

static void
do_server_request(struct server *sv, int connfd)
{
	int ret;
	struct request *rq;
	struct file_data *data;
	data = file_data_init();	
	rq = request_init(connfd, data);
	
	if (!rq) {
		file_data_free(data);
		return;
	}
	
	if(cache_active ==1){
		pthread_mutex_lock( &conditionMutex); 
		struct hash_node *cache_stored; 
		cache_stored= cache_lookup(data->file_name);
		
		if(cache_stored!=NULL){  // check if it populated in the cache{
			data->file_buf = Malloc(cache_stored->data->file_size);
			strncpy(data->file_buf, cache_stored->data->file_buf, cache_stored->data->file_size);
			data->file_size =cache_stored->data->file_size;
		}
		else{
		/* reads file, 
	 	* fills data->file_buf with the file contents,
	 	* data->file_size with file size. */
	 	pthread_mutex_unlock( &conditionMutex ); 
		ret = request_readfile(rq);
		pthread_mutex_lock( &conditionMutex ); 
		// need to renew the cache
			if(data->file_size<max_cache){
				if(data->file_size <=(max_cache-cache_current_size) ){
					cache_insert(data);
				}
				else{
					cache_evict(data->file_size);
					cache_insert(data);
				}
			}
		}
		pthread_mutex_unlock( &conditionMutex ); 


	}	
	else{
		ret = request_readfile(rq);
		if (!ret)
		goto out;
	}
	/* sends file to client */
	request_sendfile(rq);
out:
	request_destroy(rq);
	file_data_free(data);
}

int 
check_access(SVCXPRT *xprt, rpcproc_t proc, rpcprog_t prog, unsigned int rpcbvers)
{
	struct netbuf *caller = svc_getrpccaller(xprt);
	struct sockaddr *addr = (struct sockaddr *)caller->buf;
#ifdef LIBWRAP
	struct request_info req;
#endif

	/*
	 * The older PMAP_* equivalents have the same numbers, so
	 * they are accounted for here as well.
	 */
	switch (proc) {
	case RPCBPROC_SET:
	case RPCBPROC_UNSET:
		if (!insecure && !is_loopback(caller)) {
#ifdef RPCBIND_DEBUG
			  if (debugging)
			    fprintf(stderr, " declined (non-loopback sender) \n");
#endif
			if (verboselog)
				logit(log_severity, addr, proc, prog,
				    " declined (non-loopback sender)");
			return 0;
		}
		break;
	case RPCBPROC_GETADDR:
	case RPCBPROC_CALLIT:
	case RPCBPROC_INDIRECT:
	case RPCBPROC_DUMP:
	case RPCBPROC_GETTIME:
	case RPCBPROC_UADDR2TADDR:
	case RPCBPROC_TADDR2UADDR:
	case RPCBPROC_GETVERSADDR:
	case RPCBPROC_GETADDRLIST:
	case RPCBPROC_GETSTAT:
	default:
		break;
	}

#ifdef LIBWRAP
	if (addr->sa_family == AF_LOCAL)
		return 1;
	request_init(&req, RQ_DAEMON, "rpcbind", RQ_CLIENT_SIN, addr, 0);
	sock_methods(&req);
	if(!hosts_access(&req)) {

	  logit(deny_severity, addr, proc, prog, ": request from unauthorized host");
		return 0;
	}
#endif
	if (verboselog)
		logit(log_severity, addr, proc, prog, "");
    	return 1;
}

static void test_XIQueryPointer(void)
{
    int i;
    xXIQueryPointerReq request;

    memset(&request, 0, sizeof(request));

    request_init(&request, XIQueryPointer);

    reply_handler = reply_XIQueryPointer;

    client_request = init_client(request.length, &request);

    request.deviceid = XIAllDevices;
    request_XIQueryPointer(&client_request, &request, BadDevice);

    request.deviceid = XIAllMasterDevices;
    request_XIQueryPointer(&client_request, &request, BadDevice);

    request.win = root.drawable.id;
    test_data.win = &root;

    test_data.dev = devices.vcp;
    request.deviceid = devices.vcp->id;
    request_XIQueryPointer(&client_request, &request, Success);
    request.deviceid = devices.vck->id;
    request_XIQueryPointer(&client_request, &request, BadDevice);
    request.deviceid = devices.mouse->id;
    request_XIQueryPointer(&client_request, &request, BadDevice);
    request.deviceid = devices.kbd->id;
    request_XIQueryPointer(&client_request, &request, BadDevice);

    test_data.dev = devices.mouse;
    devices.mouse->u.master = NULL; /* Float, kind-of */
    request.deviceid = devices.mouse->id;
    request_XIQueryPointer(&client_request, &request, Success);

    for (i = devices.kbd->id + 1; i <= 0xFFFF; i++)
    {
        request.deviceid = i;
        request_XIQueryPointer(&client_request, &request, BadDevice);
    }

    request.win = window.drawable.id;

    test_data.dev = devices.vcp;
    test_data.win = &window;
    request.deviceid = devices.vcp->id;
    request_XIQueryPointer(&client_request, &request, Success);

    test_data.dev = devices.mouse;
    request.deviceid = devices.mouse->id;
    request_XIQueryPointer(&client_request, &request, Success);
}

int	peer_ok(char *prog, int sd)
{
	struct request_info request;

	request_init(&request, RQ_DAEMON, prog, RQ_FILE, sd, 0);
	fromhost(&request);
	if (!hosts_access(&request)) 
		return 0;
	else
		return 1;
}

static void callback(pa_mainloop_api *mainloop, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
    pa_socket_server *s = userdata;
    pa_iochannel *io;
    int nfd;

    pa_assert(s);
    pa_assert(PA_REFCNT_VALUE(s) >= 1);
    pa_assert(s->mainloop == mainloop);
    pa_assert(s->io_event == e);
    pa_assert(e);
    pa_assert(fd >= 0);
    pa_assert(fd == s->fd);

    pa_socket_server_ref(s);

    if ((nfd = pa_accept_cloexec(fd, NULL, NULL)) < 0) {
        pa_log("accept(): %s", pa_cstrerror(errno));
        goto finish;
    }

    if (!s->on_connection) {
        pa_close(nfd);
        goto finish;
    }

#ifdef HAVE_LIBWRAP

    if (s->tcpwrap_service) {
        struct request_info req;

        request_init(&req, RQ_DAEMON, s->tcpwrap_service, RQ_FILE, nfd, NULL);
        fromhost(&req);
        if (!hosts_access(&req)) {
            pa_log_warn("TCP connection refused by tcpwrap.");
            pa_close(nfd);
            goto finish;
        }

        pa_log_info("TCP connection accepted by tcpwrap.");
    }
#endif

    /* There should be a check for socket type here */
    if (s->type == SOCKET_SERVER_IPV4)
        pa_make_tcp_socket_low_delay(fd);
    else
        pa_make_socket_low_delay(fd);

    pa_assert_se(io = pa_iochannel_new(s->mainloop, nfd, nfd));
    s->on_connection(s, io, s->userdata);

finish:
    pa_socket_server_unref(s);
}