/*
- * $Id: dsi_getsess.c,v 1.7 2005-04-28 20:50:02 bfernhomberg Exp $
*
* Copyright (c) 1997 Adrian Sun (asun@zoology.washington.edu)
* All rights reserved. See COPYRIGHT.
#include <errno.h>
#include <unistd.h>
#include <signal.h>
+#include <sys/types.h>
+#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <atalk/dsi.h>
#include <atalk/server_child.h>
-static server_child *children = NULL;
-
-void dsi_kill(int sig)
-{
- if (children)
- server_child_kill(children, CHILD_DSIFORK, sig);
-}
-
-/* hand off the command. return child connection to the main program */
-DSI *dsi_getsession(DSI *dsi, server_child *serv_children,
- const int tickleval)
+/*!
+ * Start a DSI session, fork an afpd process
+ *
+ * @param childp (w) after fork: parent return pointer to child, child returns NULL
+ * @returns 0 on sucess, any other value denotes failure
+ */
+int dsi_getsession(DSI *dsi, server_child_t *serv_children, int tickleval, afp_child_t **childp)
{
pid_t pid;
-
- /* do a couple things on first entry */
- if (!dsi->inited) {
- if (!(children = serv_children))
- return NULL;
- dsi->inited = 1;
+ int ipc_fds[2];
+ afp_child_t *child;
+
+ if (socketpair(PF_UNIX, SOCK_STREAM, 0, ipc_fds) < 0) {
+ LOG(log_error, logtype_dsi, "dsi_getsess: %s", strerror(errno));
+ return -1;
}
-
- switch (pid = dsi->proto_open(dsi)) {
+
+ if (setnonblock(ipc_fds[0], 1) != 0 || setnonblock(ipc_fds[1], 1) != 0) {
+ LOG(log_error, logtype_dsi, "dsi_getsess: setnonblock: %s", strerror(errno));
+ return -1;
+ }
+
+ switch (pid = dsi->proto_open(dsi)) { /* in libatalk/dsi/dsi_tcp.c */
case -1:
/* if we fail, just return. it might work later */
LOG(log_error, logtype_dsi, "dsi_getsess: %s", strerror(errno));
- return dsi;
+ return -1;
case 0: /* child. mostly handled below. */
- dsi->child = 1;
break;
default: /* parent */
- /* using SIGQUIT is hokey, but the child might not have
+ /* using SIGKILL is hokey, but the child might not have
* re-established its signal handler for SIGTERM yet. */
- if (server_child_add(children, CHILD_DSIFORK, pid) < 0) {
+ close(ipc_fds[1]);
+ if ((child = server_child_add(serv_children, pid, ipc_fds[0])) == NULL) {
LOG(log_error, logtype_dsi, "dsi_getsess: %s", strerror(errno));
+ close(ipc_fds[0]);
dsi->header.dsi_flags = DSIFL_REPLY;
- dsi->header.dsi_code = DSIERR_SERVBUSY;
+ dsi->header.dsi_data.dsi_code = htonl(DSIERR_SERVBUSY);
dsi_send(dsi);
- dsi->header.dsi_code = DSIERR_OK;
- kill(pid, SIGQUIT);
+ dsi->header.dsi_data.dsi_code = DSIERR_OK;
+ kill(pid, SIGKILL);
}
-
dsi->proto_close(dsi);
- return dsi;
+ *childp = child;
+ return 0;
}
- /* child: check number of open connections. this is one off the
- * actual count. */
- if ((children->count >= children->nsessions) &&
- (dsi->header.dsi_command == DSIFUNC_OPEN)) {
- LOG(log_info, logtype_dsi, "dsi_getsess: too many connections");
- dsi->header.dsi_flags = DSIFL_REPLY;
- dsi->header.dsi_code = DSIERR_TOOMANY;
- dsi_send(dsi);
- exit(EXITERR_CLNT);
- }
+ /* Save number of existing and maximum connections */
+ dsi->AFPobj->cnx_cnt = serv_children->servch_count;
+ dsi->AFPobj->cnx_max = serv_children->servch_nsessions;
/* get rid of some stuff */
+ dsi->AFPobj->ipc_fd = ipc_fds[1];
+ close(ipc_fds[0]);
close(dsi->serversock);
- server_child_free(children);
- children = NULL;
+ dsi->serversock = -1;
+ server_child_free(serv_children);
switch (dsi->header.dsi_command) {
case DSIFUNC_STAT: /* send off status and return */
/* set up the tickle timer */
dsi->timer.it_interval.tv_sec = dsi->timer.it_value.tv_sec = tickleval;
dsi->timer.it_interval.tv_usec = dsi->timer.it_value.tv_usec = 0;
- signal(SIGPIPE, SIG_IGN); /* we catch these ourselves */
dsi_opensession(dsi);
- return dsi;
- break;
+ *childp = NULL;
+ return 0;
default: /* just close */
LOG(log_info, logtype_dsi, "DSIUnknown %d", dsi->header.dsi_command);