2 * $Id: dsi_getsess.c,v 1.7 2005-04-28 20:50:02 bfernhomberg Exp $
4 * Copyright (c) 1997 Adrian Sun (asun@zoology.washington.edu)
5 * All rights reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
18 #include <sys/types.h>
19 #include <sys/socket.h>
21 #include <sys/types.h>
24 #include <atalk/logger.h>
25 #include <atalk/util.h>
27 #include <atalk/dsi.h>
28 #include <atalk/server_child.h>
31 * Start a DSI session, fork an afpd process
33 * @param childp (w) after fork: parent return pointer to child, child returns NULL
34 * @returns 0 on sucess, any other value denotes failure
36 int dsi_getsession(DSI *dsi, server_child *serv_children, int tickleval, afp_child_t **childp)
39 unsigned int ipc_fds[2];
42 if (socketpair(PF_UNIX, SOCK_STREAM, 0, ipc_fds) < 0) {
43 LOG(log_error, logtype_dsi, "dsi_getsess: %s", strerror(errno));
47 if (setnonblock(ipc_fds[0], 1) != 0 || setnonblock(ipc_fds[1], 1) != 0) {
48 LOG(log_error, logtype_dsi, "dsi_getsess: setnonblock: %s", strerror(errno));
52 switch (pid = dsi->proto_open(dsi)) { /* in libatalk/dsi/dsi_tcp.c */
54 /* if we fail, just return. it might work later */
55 LOG(log_error, logtype_dsi, "dsi_getsess: %s", strerror(errno));
58 case 0: /* child. mostly handled below. */
62 /* using SIGKILL is hokey, but the child might not have
63 * re-established its signal handler for SIGTERM yet. */
65 if ((child = server_child_add(serv_children, CHILD_DSIFORK, pid, ipc_fds[0])) == NULL) {
66 LOG(log_error, logtype_dsi, "dsi_getsess: %s", strerror(errno));
68 dsi->header.dsi_flags = DSIFL_REPLY;
69 dsi->header.dsi_code = DSIERR_SERVBUSY;
71 dsi->header.dsi_code = DSIERR_OK;
74 dsi->proto_close(dsi);
79 /* child: check number of open connections. this is one off the
81 if ((serv_children->count >= serv_children->nsessions) &&
82 (dsi->header.dsi_command == DSIFUNC_OPEN)) {
83 LOG(log_info, logtype_dsi, "dsi_getsess: too many connections");
84 dsi->header.dsi_flags = DSIFL_REPLY;
85 dsi->header.dsi_code = DSIERR_TOOMANY;
90 /* get rid of some stuff */
91 dsi->AFPobj->ipc_fd = ipc_fds[1];
93 close(dsi->serversock);
95 server_child_free(serv_children);
97 switch (dsi->header.dsi_command) {
98 case DSIFUNC_STAT: /* send off status and return */
100 /* OpenTransport 1.1.2 bug workaround:
102 * OT code doesn't currently handle close sockets well. urk.
103 * the workaround: wait for the client to close its
104 * side. timeouts prevent indefinite resource use.
107 static struct timeval timeout = {120, 0};
113 FD_SET(dsi->socket, &readfds);
115 select(FD_SETSIZE, &readfds, NULL, NULL, &timeout);
120 case DSIFUNC_OPEN: /* setup session */
121 /* set up the tickle timer */
122 dsi->timer.it_interval.tv_sec = dsi->timer.it_value.tv_sec = tickleval;
123 dsi->timer.it_interval.tv_usec = dsi->timer.it_value.tv_usec = 0;
124 signal(SIGPIPE, SIG_IGN); /* we catch these ourselves */
125 dsi_opensession(dsi);
129 default: /* just close */
130 LOG(log_info, logtype_dsi, "DSIUnknown %d", dsi->header.dsi_command);
131 dsi->proto_close(dsi);