* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+/* API used by UST components to communicate with each other via sockets. */
+
#define _GNU_SOURCE
#include <sys/types.h>
#include <signal.h>
#include "ustcomm.h"
#include "usterr.h"
#include "share.h"
+#include "multipoll.h"
#define UNIX_PATH_MAX 108
-#define MSG_MAX 10000
-
-/* FIXME: ustcomm blocks on message sending, which might be problematic in
- * some cases. Fix the poll() usage so sends are buffered until they don't
- * block.
- */
-
-//static void bt(void)
-//{
-// void *buffer[100];
-// int result;
-//
-// result = backtrace(&buffer, 100);
-// backtrace_symbols_fd(buffer, result, STDERR_FILENO);
-//}
-
static int mkdir_p(const char *path, mode_t mode)
{
const char *path_p;
int retval = 0;
int result;
+ mode_t old_umask;
- tmp = malloc(strlen(path) + 1);
+ tmp = zmalloc(strlen(path) + 1);
if (tmp == NULL)
return -1;
/* skip first / */
path_p = path+1;
+ old_umask = umask(0);
for(;;) {
while (*path_p != '/') {
if(*path_p == 0)
}
free(tmp);
- return retval;
-}
-
-char *strdup_malloc(const char *s)
-{
- char *retval;
-
- if(s == NULL)
- return NULL;
-
- retval = (char *) malloc(strlen(s)+1);
-
- strcpy(retval, s);
-
+ umask(old_umask);
return retval;
}
*recv_buf_size = 0;
return 0;
}
- /* real error */
- PERROR("recv");
- return -1;
+ else if(errno == EINTR) {
+ return -1;
+ }
+ else {
+ PERROR("recv");
+ return -1;
+ }
}
if(result == 0) {
return 0;
n_fds++;
}
- fds = (struct pollfd *) malloc(n_fds * sizeof(struct pollfd));
+ fds = (struct pollfd *) zmalloc(n_fds * sizeof(struct pollfd));
if(fds == NULL) {
- ERR("malloc returned NULL");
+ ERR("zmalloc returned NULL");
return -1;
}
- conn_table = (struct ustcomm_connection **) malloc(n_fds * sizeof(struct ustcomm_connection *));
+ conn_table = (struct ustcomm_connection **) zmalloc(n_fds * sizeof(struct ustcomm_connection *));
if(conn_table == NULL) {
- ERR("malloc returned NULL");
+ ERR("zmalloc returned NULL");
retval = -1;
goto free_fds_return;
}
idx++;
}
- while((result = poll(fds, n_fds, timeout)) == -1 && errno == EINTR)
- /* nothing */;
- if(result == -1) {
+ result = poll(fds, n_fds, timeout);
+ if(result == -1 && errno == EINTR) {
+ /* That's ok. ustd receives signals to notify it must shutdown. */
+ retval = -1;
+ goto free_conn_table_return;
+ }
+ else if(result == -1) {
PERROR("poll");
retval = -1;
goto free_conn_table_return;
}
-
- if(result == 0) {
+ else if(result == 0) {
retval = 0;
goto free_conn_table_return;
}
goto free_conn_table_return;
}
- newconn = (struct ustcomm_connection *) malloc(sizeof(struct ustcomm_connection));
+ newconn = (struct ustcomm_connection *) zmalloc(sizeof(struct ustcomm_connection));
if(newconn == NULL) {
- ERR("malloc returned NULL");
+ ERR("zmalloc returned NULL");
return -1;
}
/* ENOENT */
int result;
- result = mkdir_p(dir, 0777);
+ /* mkdir mode to 0777 */
+ result = mkdir_p(dir, S_IRWXU | S_IRWXG | S_IRWXO);
if(result != 0) {
ERR("executing in recursive creation of directory %s", dir);
return -1;
return retval;
}
+/* Callback from multipoll.
+ * Receive a new connection on the listening socket.
+ */
+
+static int process_mp_incoming_conn(void *priv, int fd, short events)
+{
+ struct ustcomm_connection *newconn;
+ struct ustcomm_server *server = (struct ustcomm_server *) priv;
+ int newfd;
+ int result;
+
+ result = newfd = accept(server->listen_fd, NULL, NULL);
+ if(result == -1) {
+ PERROR("accept");
+ return -1;
+ }
+
+ newconn = (struct ustcomm_connection *) zmalloc(sizeof(struct ustcomm_connection));
+ if(newconn == NULL) {
+ ERR("zmalloc returned NULL");
+ return -1;
+ }
+
+ ustcomm_init_connection(newconn);
+ newconn->fd = newfd;
+
+ list_add(&newconn->list, &server->connections);
+
+ return 0;
+}
+
+/* Callback from multipoll.
+ * Receive a message on an existing connection.
+ */
+
+static int process_mp_conn_msg(void *priv, int fd, short revents)
+{
+ struct ustcomm_multipoll_conn_info *mpinfo = (struct ustcomm_multipoll_conn_info *) priv;
+ int result;
+ char *msg;
+ struct ustcomm_source src;
+
+ if(revents) {
+ src.fd = fd;
+
+ result = recv_message_conn(mpinfo->conn, &msg);
+ if(result == -1) {
+ ERR("error in recv_message_conn");
+ }
+
+ else if(result == 0) {
+ /* connection finished */
+ ustcomm_close_app(mpinfo->conn);
+ list_del(&mpinfo->conn->list);
+ free(mpinfo->conn);
+ }
+ else {
+ mpinfo->cb(msg, &src);
+ free(msg);
+ }
+ }
+
+ return 0;
+}
+
+int free_ustcomm_client_poll(void *data)
+{
+ free(data);
+ return 0;
+}
+
+void ustcomm_mp_add_app_clients(struct mpentries *ent, struct ustcomm_app *app, int (*cb)(char *recvbuf, struct ustcomm_source *src))
+{
+ struct ustcomm_connection *conn;
+
+ /* add listener socket */
+ multipoll_add(ent, app->server.listen_fd, POLLIN, process_mp_incoming_conn, &app->server, NULL);
+
+ list_for_each_entry(conn, &app->server.connections, list) {
+ struct ustcomm_multipoll_conn_info *mpinfo = (struct ustcomm_multipoll_conn_info *) zmalloc(sizeof(struct ustcomm_multipoll_conn_info));
+ mpinfo->conn = conn;
+ mpinfo->cb = cb;
+ multipoll_add(ent, conn->fd, POLLIN, process_mp_conn_msg, mpinfo, free_ustcomm_client_poll);
+ }
+}
projects / ust.git / blobdiff