-/*
- * $Id: afp_dsi.c,v 1.8 2001-06-20 18:33:04 rufustfirefly Exp $
- *
+/*
* Copyright (c) 1999 Adrian Sun (asun@zoology.washington.edu)
* Copyright (c) 1990,1993 Regents of The University of Michigan.
* All Rights Reserved. See COPYRIGHT.
#include <stdlib.h>
#include <signal.h>
#include <string.h>
+#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#endif /* HAVE_SYS_STAT_H */
#include <netinet/in.h>
#include <arpa/inet.h>
-#include <syslog.h>
+#include <atalk/logger.h>
+#include <setjmp.h>
#include <atalk/dsi.h>
#include <atalk/compat.h>
#include <atalk/util.h>
+#include <atalk/uuid.h>
+#include <atalk/paths.h>
+#include <atalk/server_ipc.h>
-#include "globals.h"
+#include <atalk/globals.h>
#include "switch.h"
#include "auth.h"
#include "fork.h"
+#include "dircache.h"
-extern struct oforks *writtenfork;
-
-#define CHILD_DIE (1 << 0)
-#define CHILD_RUNNING (1 << 1)
-
-static struct {
- AFPObj *obj;
- unsigned char tickle, flags;
-} child;
+#ifdef FORCE_UIDGID
+#warning UIDGID
+#include "uid.h"
+#endif /* FORCE_UIDGID */
+/*
+ * We generally pass this from afp_over_dsi to all afp_* funcs, so it should already be
+ * available everywhere. Unfortunately some funcs (eg acltoownermode) need acces to it
+ * but are deeply nested in the function chain with the caller already without acces to it.
+ * Changing this would require adding a reference to the caller which itself might be
+ * called in many places (eg acltoownermode is called from accessmode).
+ * The only sane way out is providing a copy of it here:
+ */
+AFPObj *AFPobj = NULL;
+
+typedef struct {
+ uint16_t DSIreqID;
+ uint8_t AFPcommand;
+ uint32_t result;
+} rc_elem_t;
+
+/*
+ * AFP replay cache:
+ * - fix sized array
+ * - indexed just by taking DSIreqID mod REPLAYCACHE_SIZE
+ */
+static rc_elem_t replaycache[REPLAYCACHE_SIZE];
-static __inline__ void afp_dsi_close(AFPObj *obj)
+static sigjmp_buf recon_jmp;
+static void afp_dsi_close(AFPObj *obj)
{
DSI *dsi = obj->handle;
+ close(obj->ipc_fd);
+ obj->ipc_fd = -1;
+
+ /* we may have been called from a signal handler caught when afpd was running
+ * as uid 0, that's the wrong user for volume's prexec_close scripts if any,
+ * restore our login user
+ */
+ if (geteuid() != obj->uid) {
+ if (seteuid( obj->uid ) < 0) {
+ LOG(log_error, logtype_afpd, "can't seteuid(%u) back %s: uid: %u, euid: %u",
+ obj->uid, strerror(errno), getuid(), geteuid());
+ exit(EXITERR_SYS);
+ }
+ }
+
+ close_all_vol();
if (obj->logout)
- (*obj->logout)();
-
- dsi_close(dsi);
+ (*obj->logout)();
+
+ LOG(log_note, logtype_afpd, "AFP statistics: %.2f KB read, %.2f KB written",
+ dsi->read_count/1024.0, dsi->write_count/1024.0);
+ log_dircache_stat();
- /* UAM had syslog control; afpd needs to reassert itself */
- openlog( "afpd", LOG_NDELAY|LOG_PID, LOG_DAEMON);
- syslog(LOG_INFO, "%.2fKB read, %.2fKB written",
- dsi->read_count/1024.0, dsi->write_count/1024.0);
+ dsi_close(dsi);
}
-/* a little bit of code duplication. */
+/* -------------------------------
+ * SIGTERM
+ * a little bit of code duplication.
+ */
static void afp_dsi_die(int sig)
{
- dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN);
- afp_dsi_close(child.obj);
- if (sig) /* if no signal, assume dieing because logins are disabled &
- don't log it (maintenance mode)*/
- syslog (LOG_INFO, "Connection terminated");
+ DSI *dsi = (DSI *)AFPobj->handle;
+
+ if (dsi->flags & DSI_RECONINPROG) {
+ /* Primary reconnect succeeded, got SIGTERM from afpd parent */
+ dsi->flags &= ~DSI_RECONINPROG;
+ return; /* this returns to afp_disconnect */
+ }
+
+ if (dsi->flags & DSI_DISCONNECTED) {
+ LOG(log_note, logtype_afpd, "Disconnected session terminating");
+ exit(0);
+ }
+
+ dsi_attention(AFPobj->handle, AFPATTN_SHUTDOWN);
+ afp_dsi_close(AFPobj);
+ if (sig) /* if no signal, assume dieing because logins are disabled &
+ don't log it (maintenance mode)*/
+ LOG(log_info, logtype_afpd, "Connection terminated");
if (sig == SIGTERM || sig == SIGALRM) {
- exit( 0 );
+ exit( 0 );
}
else {
- exit(sig);
+ exit(sig);
+ }
+}
+
+/* SIGQUIT handler */
+static void ipc_reconnect_handler(int sig _U_)
+{
+ DSI *dsi = (DSI *)AFPobj->handle;
+
+ LOG(log_note, logtype_afpd, "ipc_reconnect_handler: got SIGQUIT, trying IPC reconnect");
+
+ if (reconnect_ipc(AFPobj) != 0) {
+ LOG(log_error, logtype_afpd, "ipc_reconnect_handler: failed IPC reconnect");
+ afp_dsi_close(AFPobj);
+ exit(EXITERR_SYS);
+ }
+
+ LOG(log_note, logtype_afpd, "ipc_reconnect_handler: resending client ID");
+ if (ipc_child_write(AFPobj->ipc_fd, IPC_GETSESSION, AFPobj->sinfo.clientid_len, AFPobj->sinfo.clientid) != 0) {
+ LOG(log_error, logtype_afpd, "ipc_reconnect_handler: failed IPC ID resend");
+ afp_dsi_close(AFPobj);
+ exit(EXITERR_SYS);
+ }
+ LOG(log_note, logtype_afpd, "ipc_reconnect_handler: done");
+}
+
+/* SIGURG handler (primary reconnect) */
+static void afp_dsi_transfer_session(int sig _U_)
+{
+ uint16_t dsiID;
+ int socket;
+ DSI *dsi = (DSI *)AFPobj->handle;
+
+ LOG(log_debug, logtype_afpd, "afp_dsi_transfer_session: got SIGURG, trying to receive session");
+
+ if (readt(AFPobj->ipc_fd, &dsiID, 2, 0, 2) != 2) {
+ LOG(log_error, logtype_afpd, "afp_dsi_transfer_session: couldn't receive DSI id, goodbye");
+ afp_dsi_close(AFPobj);
+ exit(EXITERR_SYS);
+ }
+
+ if ((socket = recv_fd(AFPobj->ipc_fd, 1)) == -1) {
+ LOG(log_error, logtype_afpd, "afp_dsi_transfer_session: couldn't receive session fd, goodbye");
+ afp_dsi_close(AFPobj);
+ exit(EXITERR_SYS);
+ }
+
+ LOG(log_debug, logtype_afpd, "afp_dsi_transfer_session: received socket fd: %i", socket);
+
+ dsi->proto_close(dsi);
+ dsi->socket = socket;
+ dsi->flags = DSI_RECONSOCKET;
+ dsi->datalen = 0;
+ dsi->eof = dsi->start = dsi->buffer;
+ dsi->in_write = 0;
+ dsi->header.dsi_requestID = dsiID;
+ dsi->header.dsi_command = DSIFUNC_CMD;
+
+ /*
+ * The session transfer happens in the middle of FPDisconnect old session, thus we
+ * have to send the reply now.
+ */
+ if (!dsi_cmdreply(dsi, AFP_OK)) {
+ LOG(log_error, logtype_afpd, "dsi_cmdreply: %s", strerror(errno) );
+ afp_dsi_close(AFPobj);
+ exit(EXITERR_CLNT);
}
+
+ LOG(log_note, logtype_afpd, "afp_dsi_transfer_session: succesfull primary reconnect");
+ /*
+ * Now returning from this signal handler return to dsi_receive which should start
+ * reading/continuing from the connected socket that was passed via the parent from
+ * another session. The parent will terminate that session.
+ */
+ siglongjmp(recon_jmp, 1);
}
-static void afp_dsi_timedown()
+/* ------------------- */
+static void afp_dsi_timedown(int sig _U_)
{
struct sigaction sv;
struct itimerval it;
-
- child.flags |= CHILD_DIE;
+ DSI *dsi = (DSI *)AFPobj->handle;
+ dsi->flags |= DSI_DIE;
/* shutdown and don't reconnect. server going down in 5 minutes. */
setmessage("The server is going down for maintenance.");
- dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
- AFPATTN_MESG | AFPATTN_TIME(5));
+ if (dsi_attention(AFPobj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
+ AFPATTN_MESG | AFPATTN_TIME(5)) < 0) {
+ DSI *dsi = (DSI *)AFPobj->handle;
+ dsi->down_request = 1;
+ }
it.it_interval.tv_sec = 0;
it.it_interval.tv_usec = 0;
it.it_value.tv_sec = 300;
it.it_value.tv_usec = 0;
- if ( setitimer( ITIMER_REAL, &it, 0 ) < 0 ) {
- syslog( LOG_ERR, "afp_timedown: setitimer: %m" );
- afp_dsi_die(1);
- }
+ if ( setitimer( ITIMER_REAL, &it, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_timedown: setitimer: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
memset(&sv, 0, sizeof(sv));
sv.sa_handler = afp_dsi_die;
sigemptyset( &sv.sa_mask );
sigaddset(&sv.sa_mask, SIGHUP);
sigaddset(&sv.sa_mask, SIGTERM);
sv.sa_flags = SA_RESTART;
- if ( sigaction( SIGALRM, &sv, 0 ) < 0 ) {
- syslog( LOG_ERR, "afp_timedown: sigaction: %m" );
- afp_dsi_die(1);
+ if ( sigaction( SIGALRM, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_timedown: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ /* ignore myself */
+ sv.sa_handler = SIG_IGN;
+ sigemptyset( &sv.sa_mask );
+ sv.sa_flags = SA_RESTART;
+ if ( sigaction( SIGUSR1, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_timedown: sigaction SIGHUP: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
}
}
-#ifdef SERVERTEXT
-static void afp_dsi_getmesg (int sig)
+/* ---------------------------------
+ * SIGHUP reload configuration file
+ */
+volatile int reload_request = 0;
+
+static void afp_dsi_reload(int sig _U_)
+{
+ reload_request = 1;
+}
+
+/* ---------------------------------
+ * SIGINT: enable max_debug LOGging
+ */
+static volatile sig_atomic_t debug_request = 0;
+
+static void afp_dsi_debug(int sig _U_)
+{
+ debug_request = 1;
+}
+
+/* ---------------------- */
+static void afp_dsi_getmesg (int sig _U_)
+{
+ DSI *dsi = (DSI *)AFPobj->handle;
+
+ dsi->msg_request = 1;
+ if (dsi_attention(AFPobj->handle, AFPATTN_MESG | AFPATTN_TIME(5)) < 0)
+ dsi->msg_request = 2;
+}
+
+static void alarm_handler(int sig _U_)
{
- readmessage();
- dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5));
+ int err;
+ DSI *dsi = (DSI *)AFPobj->handle;
+
+ /* we have to restart the timer because some libraries may use alarm() */
+ setitimer(ITIMER_REAL, &dsi->timer, NULL);
+
+ /* we got some traffic from the client since the previous timer tick. */
+ if ((dsi->flags & DSI_DATA)) {
+ dsi->flags &= ~DSI_DATA;
+ return;
+ }
+
+ dsi->tickle++;
+ LOG(log_maxdebug, logtype_afpd, "alarm: tickles: %u, flags: %s|%s|%s|%s|%s|%s|%s|%s|%s",
+ dsi->tickle,
+ (dsi->flags & DSI_DATA) ? "DSI_DATA" : "-",
+ (dsi->flags & DSI_RUNNING) ? "DSI_RUNNING" : "-",
+ (dsi->flags & DSI_SLEEPING) ? "DSI_SLEEPING" : "-",
+ (dsi->flags & DSI_EXTSLEEP) ? "DSI_EXTSLEEP" : "-",
+ (dsi->flags & DSI_DISCONNECTED) ? "DSI_DISCONNECTED" : "-",
+ (dsi->flags & DSI_DIE) ? "DSI_DIE" : "-",
+ (dsi->flags & DSI_NOREPLY) ? "DSI_NOREPLY" : "-",
+ (dsi->flags & DSI_RECONSOCKET) ? "DSI_RECONSOCKET" : "-",
+ (dsi->flags & DSI_RECONINPROG) ? "DSI_RECONINPROG" : "-");
+
+ if (dsi->flags & DSI_SLEEPING) {
+ if (dsi->tickle > AFPobj->options.sleep) {
+ LOG(log_note, logtype_afpd, "afp_alarm: sleep time ended");
+ afp_dsi_die(EXITERR_CLNT);
+ }
+ return;
+ }
+
+ if (dsi->flags & DSI_DISCONNECTED) {
+ if (geteuid() == 0) {
+ LOG(log_note, logtype_afpd, "afp_alarm: unauthenticated user, connection problem");
+ afp_dsi_die(EXITERR_CLNT);
+ }
+ if (dsi->tickle > AFPobj->options.disconnected) {
+ LOG(log_error, logtype_afpd, "afp_alarm: reconnect timer expired, goodbye");
+ afp_dsi_die(EXITERR_CLNT);
+ }
+ return;
+ }
+
+ /* if we're in the midst of processing something, don't die. */
+ if ( !(dsi->flags & DSI_RUNNING) && (dsi->tickle >= AFPobj->options.timeout)) {
+ LOG(log_error, logtype_afpd, "afp_alarm: child timed out, entering disconnected state");
+ if (dsi_disconnect(dsi) != 0)
+ afp_dsi_die(EXITERR_CLNT);
+ return;
+ }
+
+ if ((err = pollvoltime(AFPobj)) == 0)
+ LOG(log_debug, logtype_afpd, "afp_alarm: sending DSI tickle");
+ err = dsi_tickle(AFPobj->handle);
+ if (err <= 0) {
+ if (geteuid() == 0) {
+ LOG(log_note, logtype_afpd, "afp_alarm: unauthenticated user, connection problem");
+ afp_dsi_die(EXITERR_CLNT);
+ }
+ LOG(log_error, logtype_afpd, "afp_alarm: connection problem, entering disconnected state");
+ if (dsi_disconnect(dsi) != 0)
+ afp_dsi_die(EXITERR_CLNT);
+ }
}
-#endif /* SERVERTEXT */
-static void alarm_handler()
+/* -----------------
+ if dsi->in_write is set attention, tickle (and close?) msg
+ aren't sent. We don't care about tickle
+*/
+static void pending_request(DSI *dsi)
{
- /* if we're in the midst of processing something,
- don't die. we'll allow 3 missed tickles before we die (2 minutes) */
- if ((child.flags & CHILD_RUNNING) || (child.tickle++ < 4)) {
- dsi_tickle(child.obj->handle);
- } else { /* didn't receive a tickle. close connection */
- syslog(LOG_ERR, "afp_alarm: child timed out");
- afp_dsi_die(1);
- }
+ /* send pending attention */
+
+ /* read msg if any, it could be done in afp_getsrvrmesg */
+ if (dsi->msg_request) {
+ if (dsi->msg_request == 2) {
+ /* didn't send it in signal handler */
+ dsi_attention(AFPobj->handle, AFPATTN_MESG | AFPATTN_TIME(5));
+ }
+ dsi->msg_request = 0;
+ readmessage(AFPobj);
+ }
+ if (dsi->down_request) {
+ dsi->down_request = 0;
+ dsi_attention(AFPobj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
+ AFPATTN_MESG | AFPATTN_TIME(5));
+ }
}
-/* afp over dsi. this never returns. */
+/* -------------------------------------------
+ afp over dsi. this never returns.
+*/
void afp_over_dsi(AFPObj *obj)
{
- DSI *dsi = (DSI *) obj->handle;
- u_int32_t err, cmd;
- u_int8_t function;
- struct sigaction action;
-
- obj->exit = afp_dsi_die;
- obj->reply = (int (*)()) dsi_cmdreply;
- obj->attention = (int (*)(void *, AFPUserBytes)) dsi_attention;
-
- child.obj = obj;
- child.tickle = child.flags = 0;
-
- /* install SIGTERM and SIGHUP */
- memset(&action, 0, sizeof(action));
- action.sa_handler = afp_dsi_timedown;
- sigemptyset( &action.sa_mask );
- sigaddset(&action.sa_mask, SIGALRM);
- sigaddset(&action.sa_mask, SIGTERM);
- action.sa_flags = SA_RESTART;
- if ( sigaction( SIGHUP, &action, 0 ) < 0 ) {
- syslog( LOG_ERR, "afp_over_dsi: sigaction: %m" );
- afp_dsi_die(1);
- }
-
- action.sa_handler = afp_dsi_die;
- sigemptyset( &action.sa_mask );
- sigaddset(&action.sa_mask, SIGALRM);
- sigaddset(&action.sa_mask, SIGHUP);
- action.sa_flags = SA_RESTART;
- if ( sigaction( SIGTERM, &action, 0 ) < 0 ) {
- syslog( LOG_ERR, "afp_over_dsi: sigaction: %m" );
- afp_dsi_die(1);
- }
-
-#ifdef SERVERTEXT
- /* Added for server message support */
- action.sa_handler = afp_dsi_getmesg;
- sigemptyset( &action.sa_mask );
- sigaddset(&action.sa_mask, SIGUSR2);
- action.sa_flags = SA_RESTART;
- if ( sigaction( SIGUSR2, &action, 0) < 0 ) {
- syslog( LOG_ERR, "afp_over_dsi: sigaction: %m" );
- afp_dsi_die(1);
- }
-#endif /* SERVERTEXT */
-
- /* tickle handler */
- action.sa_handler = alarm_handler;
- sigemptyset(&action.sa_mask);
- sigaddset(&action.sa_mask, SIGHUP);
- sigaddset(&action.sa_mask, SIGTERM);
- action.sa_flags = SA_RESTART;
- if ((sigaction(SIGALRM, &action, NULL) < 0) ||
- (setitimer(ITIMER_REAL, &dsi->timer, NULL) < 0)) {
- afp_dsi_die(1);
- }
-
- /* get stuck here until the end */
- while ((cmd = dsi_receive(dsi))) {
- child.tickle = 0;
-
- if (cmd == DSIFUNC_TICKLE) {
- /* so we don't get killed on the client side. */
- if (child.flags & CHILD_DIE)
- dsi_tickle(dsi);
- continue;
- } else if (!(child.flags & CHILD_DIE)) /* reset tickle timer */
- setitimer(ITIMER_REAL, &dsi->timer, NULL);
-
- switch(cmd) {
- case DSIFUNC_CLOSE:
- afp_dsi_close(obj);
- syslog(LOG_INFO, "done");
- if (obj->options.flags & OPTION_DEBUG )
- printf("done\n");
- return;
- break;
-
- case DSIFUNC_CMD:
+ DSI *dsi = (DSI *) obj->handle;
+ int rc_idx;
+ u_int32_t err, cmd;
+ u_int8_t function;
+ struct sigaction action;
+
+ AFPobj = obj;
+ dsi->AFPobj = obj;
+ obj->exit = afp_dsi_die;
+ obj->reply = (int (*)()) dsi_cmdreply;
+ obj->attention = (int (*)(void *, AFPUserBytes)) dsi_attention;
+ dsi->tickle = 0;
+
+ memset(&action, 0, sizeof(action));
+ sigfillset(&action.sa_mask);
+ action.sa_flags = SA_RESTART;
+
+ /* install SIGHUP */
+ action.sa_handler = afp_dsi_reload;
+ if ( sigaction( SIGHUP, &action, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ /* install SIGURG */
+ action.sa_handler = afp_dsi_transfer_session;
+ if ( sigaction( SIGURG, &action, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ /* install SIGTERM */
+ action.sa_handler = afp_dsi_die;
+ if ( sigaction( SIGTERM, &action, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ /* install SIGQUIT */
+ action.sa_handler = ipc_reconnect_handler;
+ if ( sigaction(SIGQUIT, &action, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ /* SIGUSR2 - server message support */
+ action.sa_handler = afp_dsi_getmesg;
+ if ( sigaction( SIGUSR2, &action, NULL) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ /* SIGUSR1 - set down in 5 minutes */
+ action.sa_handler = afp_dsi_timedown;
+ action.sa_flags = SA_RESTART;
+ if ( sigaction( SIGUSR1, &action, NULL) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ /* SIGINT - enable max_debug LOGging to /tmp/afpd.PID.XXXXXX */
+ action.sa_handler = afp_dsi_debug;
+ if ( sigaction( SIGINT, &action, NULL) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+#ifndef DEBUGGING
+ /* SIGALRM - tickle handler */
+ action.sa_handler = alarm_handler;
+ if ((sigaction(SIGALRM, &action, NULL) < 0) ||
+ (setitimer(ITIMER_REAL, &dsi->timer, NULL) < 0)) {
+ afp_dsi_die(EXITERR_SYS);
+ }
+#endif /* DEBUGGING */
+
+ if (dircache_init(obj->options.dircachesize) != 0)
+ afp_dsi_die(EXITERR_SYS);
+
+ /* set TCP snd/rcv buf */
+ if (obj->options.tcp_rcvbuf) {
+ if (setsockopt(dsi->socket,
+ SOL_SOCKET,
+ SO_RCVBUF,
+ &obj->options.tcp_rcvbuf,
+ sizeof(obj->options.tcp_rcvbuf)) != 0) {
+ LOG(log_error, logtype_dsi, "afp_over_dsi: setsockopt(SO_RCVBUF): %s", strerror(errno));
+ }
+ }
+ if (obj->options.tcp_sndbuf) {
+ if (setsockopt(dsi->socket,
+ SOL_SOCKET,
+ SO_SNDBUF,
+ &obj->options.tcp_sndbuf,
+ sizeof(obj->options.tcp_sndbuf)) != 0) {
+ LOG(log_error, logtype_dsi, "afp_over_dsi: setsockopt(SO_SNDBUF): %s", strerror(errno));
+ }
+ }
+
+ /* get stuck here until the end */
+ while (1) {
+ if (sigsetjmp(recon_jmp, 1) != 0)
+ /* returning from SIGALARM handler for a primary reconnect */
+ continue;
+
+ /* Blocking read on the network socket */
+ cmd = dsi_receive(dsi);
+
+ if (cmd == 0) {
+ /* cmd == 0 is the error condition */
+ if (dsi->flags & DSI_RECONSOCKET) {
+ /* we just got a reconnect so we immediately try again to receive on the new fd */
+ dsi->flags &= ~DSI_RECONSOCKET;
+ continue;
+ }
+ /* Some error on the client connection, enter disconnected state */
+ if (dsi_disconnect(dsi) != 0)
+ afp_dsi_die(EXITERR_CLNT);
+
+ /* the client sometimes logs out (afp_logout) but doesn't close the DSI session */
+ if (dsi->flags & DSI_AFP_LOGGED_OUT) {
+ afp_dsi_close(obj);
+ exit(0);
+ }
+
+ pause(); /* gets interrupted by SIGALARM or SIGURG tickle */
+ continue; /* continue receiving until disconnect timer expires
+ * or a primary reconnect succeeds */
+ }
+
+ if (!(dsi->flags & DSI_EXTSLEEP) && (dsi->flags & DSI_SLEEPING)) {
+ LOG(log_debug, logtype_afpd, "afp_over_dsi: got data, ending normal sleep");
+ dsi->flags &= ~DSI_SLEEPING;
+ dsi->tickle = 0;
+ }
+
+ if (reload_request) {
+ reload_request = 0;
+ load_volumes(AFPobj);
+ }
+
+ /* The first SIGINT enables debugging, the next restores the config */
+ if (debug_request) {
+ static int debugging = 0;
+ debug_request = 0;
+
+ dircache_dump();
+ uuidcache_dump();
+
+ if (debugging) {
+ if (obj->options.logconfig)
+ setuplog(obj->options.logconfig);
+ else
+ setuplog("default log_note");
+ debugging = 0;
+ } else {
+ char logstr[50];
+ debugging = 1;
+ sprintf(logstr, "default log_maxdebug /tmp/afpd.%u.XXXXXX", getpid());
+ setuplog(logstr);
+ }
+ }
+
+
+ dsi->flags |= DSI_DATA;
+ dsi->tickle = 0;
+
+ switch(cmd) {
+
+ case DSIFUNC_CLOSE:
+ LOG(log_debug, logtype_afpd, "DSI: close session request");
+ afp_dsi_close(obj);
+ LOG(log_note, logtype_afpd, "done");
+ exit(0);
+
+ case DSIFUNC_TICKLE:
+ dsi->flags &= ~DSI_DATA; /* thats no data in the sense we use it in alarm_handler */
+ LOG(log_debug, logtype_afpd, "DSI: client tickle");
+ /* timer is not every 30 seconds anymore, so we don't get killed on the client side. */
+ if ((dsi->flags & DSI_DIE))
+ dsi_tickle(dsi);
+ break;
+
+ case DSIFUNC_CMD:
#ifdef AFS
- if ( writtenfork ) {
- if ( flushfork( writtenfork ) < 0 ) {
- syslog( LOG_ERR, "main flushfork: %m" );
- }
- writtenfork = NULL;
- }
+ if ( writtenfork ) {
+ if ( flushfork( writtenfork ) < 0 ) {
+ LOG(log_error, logtype_afpd, "main flushfork: %s", strerror(errno) );
+ }
+ writtenfork = NULL;
+ }
#endif /* AFS */
- function = (u_char) dsi->commands[0];
- if (obj->options.flags & OPTION_DEBUG ) {
- printf("command: %d\n", function);
- bprint(dsi->commands, dsi->cmdlen);
- }
-
- /* send off an afp command. in a couple cases, we take advantage
- * of the fact that we're a stream-based protocol. */
- if (afp_switch[function]) {
- dsi->datalen = DSI_DATASIZ;
- child.flags |= CHILD_RUNNING;
- err = (*afp_switch[function])(obj,
- dsi->commands, dsi->cmdlen,
- dsi->data, &dsi->datalen);
- child.flags &= ~CHILD_RUNNING;
- } else {
- syslog(LOG_ERR, "bad function %X", function);
- dsi->datalen = 0;
- err = AFPERR_NOOP;
- }
-
- /* single shot toggle that gets set by dsi_readinit. */
- if (dsi->noreply) {
- dsi->noreply = 0;
- break;
- }
-
- if (obj->options.flags & OPTION_DEBUG ) {
- printf( "reply: %d, %d\n", err, dsi->clientID);
- bprint(dsi->data, dsi->datalen);
- }
-
- if (!dsi_cmdreply(dsi, err)) {
- syslog(LOG_ERR, "dsi_cmdreply(%d): %m", dsi->socket);
- afp_dsi_die(1);
- }
- break;
-
- case DSIFUNC_WRITE: /* FPWrite and FPAddIcon */
- function = (u_char) dsi->commands[0];
- if ( obj->options.flags & OPTION_DEBUG ) {
- printf("(write) command: %d, %d\n", function, dsi->cmdlen);
- bprint(dsi->commands, dsi->cmdlen);
- }
-
- if ( afp_switch[ function ] != NULL ) {
- dsi->datalen = DSI_DATASIZ;
- child.flags |= CHILD_RUNNING;
- err = (*afp_switch[function])(obj, dsi->commands, dsi->cmdlen,
- dsi->data, &dsi->datalen);
- child.flags &= ~CHILD_RUNNING;
- } else {
- syslog( LOG_ERR, "(write) bad function %x", function);
- dsi->datalen = 0;
- err = AFPERR_NOOP;
- }
-
- if (obj->options.flags & OPTION_DEBUG ) {
- printf( "(write) reply code: %d, %d\n", err, dsi->clientID);
- bprint(dsi->data, dsi->datalen);
- }
-
- if (!dsi_wrtreply(dsi, err)) {
- syslog( LOG_ERR, "dsi_wrtreply: %m" );
- afp_dsi_die(1);
- }
- break;
-
- case DSIFUNC_ATTN: /* attention replies */
- continue;
- break;
-
- /* error. this usually implies a mismatch of some kind
- * between server and client. if things are correct,
- * we need to flush the rest of the packet if necessary. */
- default:
- syslog(LOG_INFO,"afp_dsi: spurious command %d", cmd);
- dsi_writeinit(dsi, dsi->data, DSI_DATASIZ);
- dsi_writeflush(dsi);
- break;
- }
-
- if ( obj->options.flags & OPTION_DEBUG ) {
-#ifdef notdef
- pdesc( stdout );
-#endif /* notdef */
- of_pforkdesc( stdout );
- fflush( stdout );
+ function = (u_char) dsi->commands[0];
+
+ /* AFP replay cache */
+ rc_idx = dsi->clientID % REPLAYCACHE_SIZE;
+ LOG(log_debug, logtype_afpd, "DSI request ID: %u", dsi->clientID);
+
+ if (replaycache[rc_idx].DSIreqID == dsi->clientID
+ && replaycache[rc_idx].AFPcommand == function) {
+ LOG(log_note, logtype_afpd, "AFP Replay Cache match: id: %u / cmd: %s",
+ dsi->clientID, AfpNum2name(function));
+ err = replaycache[rc_idx].result;
+ /* AFP replay cache end */
+ } else {
+ /* send off an afp command. in a couple cases, we take advantage
+ * of the fact that we're a stream-based protocol. */
+ if (afp_switch[function]) {
+ dsi->datalen = DSI_DATASIZ;
+ dsi->flags |= DSI_RUNNING;
+
+ LOG(log_debug, logtype_afpd, "<== Start AFP command: %s", AfpNum2name(function));
+
+ err = (*afp_switch[function])(obj,
+ (char *)&dsi->commands, dsi->cmdlen,
+ (char *)&dsi->data, &dsi->datalen);
+
+ LOG(log_debug, logtype_afpd, "==> Finished AFP command: %s -> %s",
+ AfpNum2name(function), AfpErr2name(err));
+
+ dir_free_invalid_q();
+
+#ifdef FORCE_UIDGID
+ /* bring everything back to old euid, egid */
+ if (obj->force_uid)
+ restore_uidgid ( &obj->uidgid );
+#endif /* FORCE_UIDGID */
+ dsi->flags &= ~DSI_RUNNING;
+
+ /* Add result to the AFP replay cache */
+ replaycache[rc_idx].DSIreqID = dsi->clientID;
+ replaycache[rc_idx].AFPcommand = function;
+ replaycache[rc_idx].result = err;
+ } else {
+ LOG(log_error, logtype_afpd, "bad function %X", function);
+ dsi->datalen = 0;
+ err = AFPERR_NOOP;
+ }
+ }
+
+ /* single shot toggle that gets set by dsi_readinit. */
+ if (dsi->flags & DSI_NOREPLY) {
+ dsi->flags &= ~DSI_NOREPLY;
+ break;
+ }
+
+ if (!dsi_cmdreply(dsi, err)) {
+ LOG(log_error, logtype_afpd, "dsi_cmdreply(%d): %s", dsi->socket, strerror(errno) );
+ if (dsi_disconnect(dsi) != 0)
+ afp_dsi_die(EXITERR_CLNT);
+ }
+ break;
+
+ case DSIFUNC_WRITE: /* FPWrite and FPAddIcon */
+ function = (u_char) dsi->commands[0];
+ if ( afp_switch[ function ] != NULL ) {
+ dsi->datalen = DSI_DATASIZ;
+ dsi->flags |= DSI_RUNNING;
+
+ LOG(log_debug, logtype_afpd, "<== Start AFP command: %s", AfpNum2name(function));
+
+ err = (*afp_switch[function])(obj,
+ (char *)&dsi->commands, dsi->cmdlen,
+ (char *)&dsi->data, &dsi->datalen);
+
+ LOG(log_debug, logtype_afpd, "==> Finished AFP command: %s -> %s",
+ AfpNum2name(function), AfpErr2name(err));
+
+ dsi->flags &= ~DSI_RUNNING;
+#ifdef FORCE_UIDGID
+ /* bring everything back to old euid, egid */
+ if (obj->force_uid)
+ restore_uidgid ( &obj->uidgid );
+#endif /* FORCE_UIDGID */
+ } else {
+ LOG(log_error, logtype_afpd, "(write) bad function %x", function);
+ dsi->datalen = 0;
+ err = AFPERR_NOOP;
+ }
+
+ if (!dsi_wrtreply(dsi, err)) {
+ LOG(log_error, logtype_afpd, "dsi_wrtreply: %s", strerror(errno) );
+ if (dsi_disconnect(dsi) != 0)
+ afp_dsi_die(EXITERR_CLNT);
+ }
+ break;
+
+ case DSIFUNC_ATTN: /* attention replies */
+ break;
+
+ /* error. this usually implies a mismatch of some kind
+ * between server and client. if things are correct,
+ * we need to flush the rest of the packet if necessary. */
+ default:
+ LOG(log_info, logtype_afpd,"afp_dsi: spurious command %d", cmd);
+ dsi_writeinit(dsi, dsi->data, DSI_DATASIZ);
+ dsi_writeflush(dsi);
+ break;
+ }
+ pending_request(dsi);
}
- }
- /* error */
- afp_dsi_die(1);
+ /* error */
+ afp_dsi_die(EXITERR_CLNT);
}
projects / netatalk.git / blobdiff