+++ /dev/null
-/*
- * Citadel "system dependent" stuff.
- *
- * Here's where we (hopefully) have most parts of the Citadel server that
- * would need to be altered to run the server in a non-POSIX environment.
- *
- * If we ever port to a different platform and either have multiple
- * variants of this file or simply load it up with #ifdefs.
- *
- * Copyright (c) 1987-2011 by the citadel.org team
- *
- * This program is open source software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include "sysdep.h"
-
-#include <errno.h>
-#include <signal.h>
-#include <stdio.h>
-#include <syslog.h>
-#include <sys/syslog.h>
-
-
-#include <sys/un.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-
-#define SHOW_ME_VAPPEND_PRINTF
-#include <libcitadel.h>
-
-#include "citserver.h"
-#include "ctdl_module.h"
-
-#include "sysdep_decls.h"
-#include "modules/crypto/serv_crypto.h" /* Needed for init_ssl, client_write_ssl, client_read_ssl, destruct_ssl */
-
-#include "housekeeping.h"
-#include "context.h"
-/*
- * Signal handler to shut down the server.
- */
-
-volatile int exit_signal = 0;
-volatile int shutdown_and_halt = 0;
-volatile int restart_server = 0;
-volatile int running_as_daemon = 0;
-
-static RETSIGTYPE signal_cleanup(int signum) {
- syslog(LOG_DEBUG, "Caught signal %d; shutting down.", signum);
- exit_signal = signum;
- server_shutting_down = 1;
-}
-
-static RETSIGTYPE signal_exit(int signum) {
- exit(1);
-}
-
-
-
-/*
- * Some initialization stuff...
- */
-void init_sysdep(void) {
- sigset_t set;
-
- /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
-#ifdef FD_SETSIZE
-#ifdef RLIMIT_NOFILE
- struct rlimit rl;
- getrlimit(RLIMIT_NOFILE, &rl);
- rl.rlim_cur = FD_SETSIZE;
- rl.rlim_max = FD_SETSIZE;
- setrlimit(RLIMIT_NOFILE, &rl);
-#endif
-#endif
-
- /* If we've got OpenSSL, we're going to use it. */
-#ifdef HAVE_OPENSSL
- init_ssl();
-#endif
-
- /*
- * Set up a place to put thread-specific data.
- * We only need a single pointer per thread - it points to the
- * CitContext structure (in the ContextList linked list) of the
- * session to which the calling thread is currently bound.
- */
- if (pthread_key_create(&MyConKey, NULL) != 0) {
- syslog(LOG_CRIT, "Can't create TSD key: %s", strerror(errno));
- }
-
- /*
- * Interript, hangup, and terminate signals should cause the server
- * to gracefully clean up and shut down.
- */
- sigemptyset(&set);
- sigaddset(&set, SIGINT);
- sigaddset(&set, SIGHUP);
- sigaddset(&set, SIGTERM);
- sigprocmask(SIG_UNBLOCK, &set, NULL);
-
- signal(SIGINT, signal_cleanup);
- signal(SIGHUP, signal_cleanup);
- signal(SIGTERM, signal_cleanup);
- signal(SIGUSR2, signal_exit);
-
- /*
- * Do not shut down the server on broken pipe signals, otherwise the
- * whole Citadel service would come down whenever a single client
- * socket breaks.
- */
- signal(SIGPIPE, SIG_IGN);
-}
-
-
-/*
- * This is a generic function to set up a master socket for listening on
- * a TCP port. The server shuts down if the bind fails. (IPv4/IPv6 version)
- *
- * ip_addr IP address to bind
- * port_number port number to bind
- * queue_len number of incoming connections to allow in the queue
- */
-int ctdl_tcp_server(char *ip_addr, int port_number, int queue_len, char *errormessage)
-{
- struct protoent *p;
- struct sockaddr_in6 sin6;
- struct sockaddr_in sin4;
- int s, i, b;
- int ip_version = 6;
-
- memset(&sin6, 0, sizeof(sin6));
- memset(&sin4, 0, sizeof(sin4));
- sin6.sin6_family = AF_INET6;
- sin4.sin_family = AF_INET;
-
- if ( (ip_addr == NULL) /* any IPv6 */
- || (IsEmptyStr(ip_addr))
- || (!strcmp(ip_addr, "*"))
- ) {
- ip_version = 6;
- sin6.sin6_addr = in6addr_any;
- }
- else if (!strcmp(ip_addr, "0.0.0.0")) /* any IPv4 */
- {
- ip_version = 4;
- sin4.sin_addr.s_addr = INADDR_ANY;
- }
- else if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':'))) /* specific IPv4 */
- {
- ip_version = 4;
- if (inet_pton(AF_INET, ip_addr, &sin4.sin_addr) <= 0) {
- snprintf(errormessage, SIZ,
- "Error binding to [%s] : %s", ip_addr, strerror(errno)
- );
- syslog(LOG_ALERT, "%s", errormessage);
- return (-1);
- }
- }
- else /* specific IPv6 */
- {
- ip_version = 6;
- if (inet_pton(AF_INET6, ip_addr, &sin6.sin6_addr) <= 0) {
- snprintf(errormessage, SIZ,
- "Error binding to [%s] : %s", ip_addr, strerror(errno)
- );
- syslog(LOG_ALERT, "%s", errormessage);
- return (-1);
- }
- }
-
- if (port_number == 0) {
- snprintf(errormessage, SIZ, "Can't start: no port number specified.");
- syslog(LOG_ALERT, "%s", errormessage);
- return (-1);
- }
- sin6.sin6_port = htons((u_short) port_number);
- sin4.sin_port = htons((u_short) port_number);
-
- p = getprotobyname("tcp");
-
- s = socket( ((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
- if (s < 0) {
- snprintf(errormessage, SIZ,
- "Can't create a listening socket: %s", strerror(errno)
- );
- syslog(LOG_ALERT, "%s", errormessage);
- return (-1);
- }
- /* Set some socket options that make sense. */
- i = 1;
- setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
-
- if (ip_version == 6) {
- b = bind(s, (struct sockaddr *) &sin6, sizeof(sin6));
- }
- else {
- b = bind(s, (struct sockaddr *) &sin4, sizeof(sin4));
- }
-
- if (b < 0) {
- snprintf(errormessage, SIZ,
- "Can't bind: %s", strerror(errno)
- );
- syslog(LOG_ALERT, "%s", errormessage);
- return (-1);
- }
-
- fcntl(s, F_SETFL, O_NONBLOCK);
-
- if (listen(s, ((queue_len >= 5) ? queue_len : 5) ) < 0) {
- snprintf(errormessage, SIZ,
- "Can't listen: %s", strerror(errno)
- );
- syslog(LOG_ALERT, "%s", errormessage);
- return (-1);
- }
- return (s);
-}
-
-
-
-
-
-/*
- * Create a Unix domain socket and listen on it
- */
-int ctdl_uds_server(char *sockpath, int queue_len, char *errormessage)
-{
- struct sockaddr_un addr;
- int s;
- int i;
- int actual_queue_len;
-#ifdef HAVE_STRUCT_UCRED
- int passcred = 1;
-#endif
-
- actual_queue_len = queue_len;
- if (actual_queue_len < 5) actual_queue_len = 5;
-
- i = unlink(sockpath);
- if ((i != 0) && (errno != ENOENT)) {
- snprintf(errormessage, SIZ, "citserver: can't unlink %s: %s",
- sockpath, strerror(errno)
- );
- syslog(LOG_EMERG, "%s", errormessage);
- return(-1);
- }
-
- memset(&addr, 0, sizeof(addr));
- addr.sun_family = AF_UNIX;
- safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
-
- s = socket(AF_UNIX, SOCK_STREAM, 0);
- if (s < 0) {
- snprintf(errormessage, SIZ,
- "citserver: Can't create a socket: %s",
- strerror(errno));
- syslog(LOG_EMERG, "%s", errormessage);
- return(-1);
- }
-
- if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
- snprintf(errormessage, SIZ,
- "citserver: Can't bind: %s",
- strerror(errno));
- syslog(LOG_EMERG, "%s", errormessage);
- return(-1);
- }
-
- /* set to nonblock - we need this for some obscure situations */
- if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
- snprintf(errormessage, SIZ,
- "citserver: Can't set socket to non-blocking: %s",
- strerror(errno));
- syslog(LOG_EMERG, "%s", errormessage);
- close(s);
- return(-1);
- }
-
- if (listen(s, actual_queue_len) < 0) {
- snprintf(errormessage, SIZ,
- "citserver: Can't listen: %s",
- strerror(errno));
- syslog(LOG_EMERG, "%s", errormessage);
- return(-1);
- }
-
-#ifdef HAVE_STRUCT_UCRED
- setsockopt(s, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
-#endif
-
- chmod(sockpath, S_ISGID|S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
- return(s);
-}
-
-
-
-/*
- * The following functions implement output buffering on operating systems which
- * support it (such as Linux and various BSD flavors).
- */
-#ifndef HAVE_DARWIN
-#ifdef TCP_CORK
-# define HAVE_TCP_BUFFERING
-#else
-# ifdef TCP_NOPUSH
-# define HAVE_TCP_BUFFERING
-# define TCP_CORK TCP_NOPUSH
-# endif
-#endif /* TCP_CORK */
-#endif /* HAVE_DARWIN */
-
-static unsigned on = 1, off = 0;
-
-void buffer_output(void) {
-#ifdef HAVE_TCP_BUFFERING
-#ifdef HAVE_OPENSSL
- if (!CC->redirect_ssl)
-#endif
- setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
-#endif
-}
-
-void unbuffer_output(void) {
-#ifdef HAVE_TCP_BUFFERING
-#ifdef HAVE_OPENSSL
- if (!CC->redirect_ssl)
-#endif
- setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
-#endif
-}
-
-void flush_output(void) {
-#ifdef HAVE_TCP_BUFFERING
- struct CitContext *CCC = CC;
- setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
- setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
-#endif
-}
-
-/*
-static void flush_client_inbuf(void)
-{
- CitContext *CCC=CC;
-
- FlushStrBuf(CCC->ReadBuf);
- CCC->RecvBuf->ReadWritePointer = NULL;
-
-}
-*/
-
-
-/*
- * client_close() ... close the client socket
- */
-void client_close(void) {
- CitContext *CCC = CC;
-
- if (!CCC) return;
- if (CCC->client_socket <= 0) return;
- syslog(LOG_DEBUG, "Closing socket %d", CCC->client_socket);
-
- close(CCC->client_socket);
- CCC->client_socket = -1 ;
-}
-
-
-
-
-/*
- * client_write() ... Send binary data to the client.
- */
-int client_write(const char *buf, int nbytes)
-{
- int bytes_written = 0;
- int retval;
-#ifndef HAVE_TCP_BUFFERING
- int old_buffer_len = 0;
-#endif
- fd_set wset;
- CitContext *Ctx;
- int fdflags;
-
- if (nbytes < 1) return(0);
-
- Ctx = CC;
-
-#ifdef BIGBAD_IODBG
- {
- int rv = 0;
- char fn [SIZ];
- FILE *fd;
-
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", Ctx->ServiceName, Ctx->cs_pid);
-
- fd = fopen(fn, "a+");
- if (fd == NULL) {
- syslog(LOG_EMERG, "failed to open file %s: %s", fn, strerror(errno));
- cit_backtrace();
- exit(1);
- }
- fprintf(fd, "Sending: BufSize: %d BufContent: [",
- nbytes);
- rv = fwrite(buf, nbytes, 1, fd);
- fprintf(fd, "]\n");
- fclose(fd);
- }
-#endif
-// flush_client_inbuf();
- if (Ctx->redirect_buffer != NULL) {
- StrBufAppendBufPlain(Ctx->redirect_buffer,
- buf, nbytes, 0);
- return 0;
- }
-
-#ifdef HAVE_OPENSSL
- if (Ctx->redirect_ssl) {
- client_write_ssl(buf, nbytes);
- return 0;
- }
-#endif
- if (Ctx->client_socket == -1) return -1;
-
- fdflags = fcntl(Ctx->client_socket, F_GETFL);
-
- while ((bytes_written < nbytes) && (Ctx->client_socket != -1)){
- if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
- FD_ZERO(&wset);
- FD_SET(Ctx->client_socket, &wset);
- if (select(1, NULL, &wset, NULL, NULL) == -1) {
- if (errno == EINTR)
- {
- syslog(LOG_DEBUG, "client_write(%d bytes) select() interrupted.",
- nbytes-bytes_written
- );
- if (server_shutting_down) {
- CC->kill_me = KILLME_SELECT_INTERRUPTED;
- return (-1);
- } else {
- /* can't trust fd's and stuff so we need to re-create them */
- continue;
- }
- } else {
- syslog(LOG_ERR,
- "client_write(%d bytes) select failed: %s (%d)",
- nbytes - bytes_written,
- strerror(errno), errno
- );
- cit_backtrace();
- client_close();
- Ctx->kill_me = KILLME_SELECT_FAILED;
- return -1;
- }
- }
- }
-
- retval = write(Ctx->client_socket, &buf[bytes_written], nbytes - bytes_written);
- if (retval < 1) {
- syslog(LOG_ERR,
- "client_write(%d bytes) failed: %s (%d)",
- nbytes - bytes_written,
- strerror(errno), errno
- );
- cit_backtrace();
- client_close();
- Ctx->kill_me = KILLME_WRITE_FAILED;
- return -1;
- }
- bytes_written = bytes_written + retval;
- }
- return 0;
-}
-
-void cputbuf(const StrBuf *Buf) {
- client_write(ChrPtr(Buf), StrLength(Buf));
-}
-
-
-/*
- * cprintf() Send formatted printable data to the client.
- * Implemented in terms of client_write() so it's technically not sysdep...
- */
-void cprintf(const char *format, ...) {
- va_list arg_ptr;
- char buf[1024];
-
- va_start(arg_ptr, format);
- if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
- buf[sizeof buf - 2] = '\n';
- client_write(buf, strlen(buf));
- va_end(arg_ptr);
-}
-
-
-/*
- * Read data from the client socket.
- *
- * sock socket fd to read from
- * buf buffer to read into
- * bytes number of bytes to read
- * timeout Number of seconds to wait before timing out
- *
- * Possible return values:
- * 1 Requested number of bytes has been read.
- * 0 Request timed out.
- * -1 Connection is broken, or other error.
- */
-int client_read_blob(StrBuf *Target, int bytes, int timeout)
-{
- CitContext *CCC=CC;
- const char *Error;
- int retval = 0;
-
-#ifdef HAVE_OPENSSL
- if (CCC->redirect_ssl) {
-#ifdef BIGBAD_IODBG
- int rv = 0;
- char fn [SIZ];
- FILE *fd;
-
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- if (fd == NULL) {
- syslog(LOG_EMERG, "failed to open file %s: %s", fn, strerror(errno));
- cit_backtrace();
- exit(1);
- }
- fprintf(fd, "Reading BLOB: BufSize: %d ",
- bytes);
- rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
- fprintf(fd, "]\n");
-
-
- fclose(fd);
-#endif
- retval = client_read_sslblob(Target, bytes, timeout);
- if (retval < 0) {
- syslog(LOG_CRIT, "client_read_blob() failed");
- }
-#ifdef BIGBAD_IODBG
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- if (fd == NULL) {
- syslog(LOG_EMERG, "failed to open file %s: %s", fn, strerror(errno));
- cit_backtrace();
- exit(1);
- }
- fprintf(fd, "Read: %d BufContent: [",
- StrLength(Target));
- rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
- fprintf(fd, "]\n");
-
-
- fclose(fd);
-#endif
- }
- else
-#endif
- {
-#ifdef BIGBAD_IODBG
- int rv = 0;
- char fn [SIZ];
- FILE *fd;
-
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- if (fd == NULL) {
- syslog(LOG_EMERG, "failed to open file %s: %s", fn, strerror(errno));
- cit_backtrace();
- exit(1);
- }
- fprintf(fd, "Reading BLOB: BufSize: %d ",
- bytes);
- rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
- fprintf(fd, "]\n");
-
-
- fclose(fd);
-#endif
- retval = StrBufReadBLOBBuffered(Target,
- CCC->RecvBuf.Buf,
- &CCC->RecvBuf.ReadWritePointer,
- &CCC->client_socket,
- 1,
- bytes,
- O_TERM,
- &Error);
- if (retval < 0) {
- syslog(LOG_CRIT, "client_read_blob() failed: %s", Error);
- client_close();
- return retval;
- }
-#ifdef BIGBAD_IODBG
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- if (fd == NULL) {
- syslog(LOG_EMERG, "failed to open file %s: %s", fn, strerror(errno));
- cit_backtrace();
- exit(1);
- }
- fprintf(fd, "Read: %d BufContent: [",
- StrLength(Target));
- rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
- fprintf(fd, "]\n");
- fclose(fd);
-#endif
- }
- return retval;
-}
-
-
-/*
- * to make client_read_random_blob() more efficient, increase buffer size.
- * just use in greeting function, else your buffer may be flushed
- */
-void client_set_inbound_buf(long N)
-{
- CitContext *CCC=CC;
- FlushStrBuf(CCC->RecvBuf.Buf);
- ReAdjustEmptyBuf(CCC->RecvBuf.Buf, N * SIZ, N * SIZ);
-}
-
-int client_read_random_blob(StrBuf *Target, int timeout)
-{
- CitContext *CCC=CC;
- int rc;
-
- rc = client_read_blob(Target, 1, timeout);
- if (rc > 0)
- {
- long len;
- const char *pch;
-
- len = StrLength(CCC->RecvBuf.Buf);
- pch = ChrPtr(CCC->RecvBuf.Buf);
-
- if (len > 0)
- {
- if (CCC->RecvBuf.ReadWritePointer != NULL) {
- len -= CCC->RecvBuf.ReadWritePointer - pch;
- pch = CCC->RecvBuf.ReadWritePointer;
- }
- StrBufAppendBufPlain(Target, pch, len, 0);
- FlushStrBuf(CCC->RecvBuf.Buf);
- CCC->RecvBuf.ReadWritePointer = NULL;
-#ifdef BIGBAD_IODBG
- {
- int rv = 0;
- char fn [SIZ];
- FILE *fd;
-
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- if (fd == NULL) {
- syslog(LOG_EMERG, "failed to open file %s: %s", fn, strerror(errno));
- cit_backtrace();
- exit(1);
- }
- fprintf(fd, "Read: BufSize: %d BufContent: [",
- StrLength(Target));
- rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
- fprintf(fd, "]\n");
-
-
- fclose(fd);
- }
-#endif
-
- return StrLength(Target);
- }
- return rc;
- }
- else
- return rc;
-}
-
-int client_read_to(char *buf, int bytes, int timeout)
-{
- CitContext *CCC=CC;
- int rc;
-
- rc = client_read_blob(CCC->MigrateBuf, bytes, timeout);
- if (rc < 0)
- {
- *buf = '\0';
- return rc;
- }
- else
- {
- memcpy(buf,
- ChrPtr(CCC->MigrateBuf),
- StrLength(CCC->MigrateBuf) + 1);
- FlushStrBuf(CCC->MigrateBuf);
- return rc;
- }
-}
-
-
-int HaveMoreLinesWaiting(CitContext *CCC)
-{
- if ((CCC->kill_me != 0) ||
- ( (CCC->RecvBuf.ReadWritePointer == NULL) &&
- (StrLength(CCC->RecvBuf.Buf) == 0) &&
- (CCC->client_socket != -1)) )
- return 0;
- else
- return 1;
-}
-
-
-/*
- * Read data from the client socket with default timeout.
- * (This is implemented in terms of client_read_to() and could be
- * justifiably moved out of sysdep.c)
- */
-INLINE int client_read(char *buf, int bytes)
-{
- return(client_read_to(buf, bytes, config.c_sleeping));
-}
-
-int CtdlClientGetLine(StrBuf *Target)
-{
- CitContext *CCC=CC;
- const char *Error;
- int rc;
-
- FlushStrBuf(Target);
-#ifdef HAVE_OPENSSL
- if (CCC->redirect_ssl) {
-#ifdef BIGBAD_IODBG
- char fn [SIZ];
- FILE *fd;
- int len = 0;
- int rlen = 0;
- int nlen = 0;
- int nrlen = 0;
- const char *pch;
-
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- if (fd == NULL) {
- syslog(LOG_EMERG, "failed to open file %s: %s", fn, strerror(errno));
- cit_backtrace();
- exit(1);
- }
- pch = ChrPtr(CCC->RecvBuf.Buf);
- len = StrLength(CCC->RecvBuf.Buf);
- if (CCC->RecvBuf.ReadWritePointer != NULL)
- rlen = CCC->RecvBuf.ReadWritePointer - pch;
- else
- rlen = 0;
-
-/* fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
- len, rlen, pch);
-*/
- fprintf(fd, "\n\n\nSSL1: BufSize: %d BufPos: %d \n_____________________\n",
- len, rlen);
-#endif
- rc = client_readline_sslbuffer(Target,
- CCC->RecvBuf.Buf,
- &CCC->RecvBuf.ReadWritePointer,
- 1);
-#ifdef BIGBAD_IODBG
- pch = ChrPtr(CCC->RecvBuf.Buf);
- nlen = StrLength(CCC->RecvBuf.Buf);
- if (CCC->RecvBuf.ReadWritePointer != NULL)
- nrlen = CCC->RecvBuf.ReadWritePointer - pch;
- else
- nrlen = 0;
-/*
- fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
- len, nlen, rlen, nrlen, pch);
-*/
- fprintf(fd, "\n\n\nSSL2: BufSize: was: %d is: %d BufPos: was: %d is: %d \n",
- len, nlen, rlen, nrlen);
-
- fprintf(fd, "SSL3: Read: BufSize: %d BufContent: [%s]\n\n*************\n",
- StrLength(Target), ChrPtr(Target));
- fclose(fd);
-
- if (rc < 0) {
- syslog(LOG_CRIT, "CtdlClientGetLine() failed");
- }
-#endif
- return rc;
- }
- else
-#endif
- {
-#ifdef BIGBAD_IODBG
- char fn [SIZ];
- FILE *fd;
- int len, rlen, nlen, nrlen;
- const char *pch;
-
- snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
-
- fd = fopen(fn, "a+");
- if (fd == NULL) {
- syslog(LOG_EMERG, "failed to open file %s: %s", fn, strerror(errno));
- cit_backtrace();
- exit(1);
- }
- pch = ChrPtr(CCC->RecvBuf.Buf);
- len = StrLength(CCC->RecvBuf.Buf);
- if (CCC->RecvBuf.ReadWritePointer != NULL)
- rlen = CCC->RecvBuf.ReadWritePointer - pch;
- else
- rlen = 0;
-
-/* fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
- len, rlen, pch);
-*/
- fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
- len, rlen);
-#endif
- rc = StrBufTCP_read_buffered_line_fast(Target,
- CCC->RecvBuf.Buf,
- &CCC->RecvBuf.ReadWritePointer,
- &CCC->client_socket,
- 5,
- 1,
- &Error);
-
-#ifdef BIGBAD_IODBG
- pch = ChrPtr(CCC->RecvBuf.Buf);
- nlen = StrLength(CCC->RecvBuf.Buf);
- if (CCC->RecvBuf.ReadWritePointer != NULL)
- nrlen = CCC->RecvBuf.ReadWritePointer - pch;
- else
- nrlen = 0;
-/*
- fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
- len, nlen, rlen, nrlen, pch);
-*/
- fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
- len, nlen, rlen, nrlen);
-
- fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
- StrLength(Target), ChrPtr(Target));
- fclose(fd);
-
- if ((rc < 0) && (Error != NULL)) {
- syslog(LOG_CRIT, "CtdlClientGetLine() failed: %s", Error);
- }
-#endif
- return rc;
- }
-}
-
-
-/*
- * client_getln() ... Get a LF-terminated line of text from the client.
- * (This is implemented in terms of client_read() and could be
- * justifiably moved out of sysdep.c)
- */
-int client_getln(char *buf, int bufsize)
-{
- int i, retval;
- CitContext *CCC=CC;
- const char *pCh;
-
- retval = CtdlClientGetLine(CCC->MigrateBuf);
- if (retval < 0)
- return(retval >= 0);
-
-
- i = StrLength(CCC->MigrateBuf);
- pCh = ChrPtr(CCC->MigrateBuf);
- /* Strip the trailing LF, and the trailing CR if present.
- */
- if (bufsize <= i)
- i = bufsize - 1;
- while ( (i > 0)
- && ( (pCh[i - 1]==13)
- || ( pCh[i - 1]==10)) ) {
- i--;
- }
- memcpy(buf, pCh, i);
- buf[i] = 0;
-
- FlushStrBuf(CCC->MigrateBuf);
- if (retval < 0) {
- safestrncpy(&buf[i], "000", bufsize - i);
- }
- return(retval >= 0);
-}
-
-
-/*
- * Cleanup any contexts that are left lying around
- */
-
-
-void close_masters (void)
-{
- struct ServiceFunctionHook *serviceptr;
- const char *Text;
-
- /*
- * close all protocol master sockets
- */
- for (serviceptr = ServiceHookTable; serviceptr != NULL;
- serviceptr = serviceptr->next ) {
-
- if (serviceptr->tcp_port > 0)
- {
- if (serviceptr->msock == -1)
- Text = "not closing again";
- else
- Text = "Closing";
-
- syslog(LOG_INFO, "%s %d listener on port %d\n",
- Text,
- serviceptr->msock,
- serviceptr->tcp_port);
- serviceptr->tcp_port = 0;
- }
-
- if (serviceptr->sockpath != NULL)
- {
- if (serviceptr->msock == -1)
- Text = "not closing again";
- else
- Text = "Closing";
-
- syslog(LOG_INFO, "%s %d listener on '%s'\n",
- Text,
- serviceptr->msock,
- serviceptr->sockpath);
- }
-
- if (serviceptr->msock != -1)
- {
- close(serviceptr->msock);
- serviceptr->msock = -1;
- }
-
- /* If it's a Unix domain socket, remove the file. */
- if (serviceptr->sockpath != NULL) {
- unlink(serviceptr->sockpath);
- serviceptr->sockpath = NULL;
- }
- }
-}
-
-
-/*
- * The system-dependent part of master_cleanup() - close the master socket.
- */
-void sysdep_master_cleanup(void) {
-
- close_masters();
-
- context_cleanup();
-
-#ifdef HAVE_OPENSSL
- destruct_ssl();
-#endif
- CtdlDestroyProtoHooks();
- CtdlDestroyDeleteHooks();
- CtdlDestroyXmsgHooks();
- CtdlDestroyNetprocHooks();
- CtdlDestroyUserHooks();
- CtdlDestroyMessageHook();
- CtdlDestroyCleanupHooks();
- CtdlDestroyFixedOutputHooks();
- CtdlDestroySessionHooks();
- CtdlDestroyTDAPVetoHooks();
- CtdlDestroyServiceHook();
- CtdlDestroyRoomHooks();
- CtdlDestroySearchHooks();
- CtdlDestroyDebugTable();
- #ifdef HAVE_BACKTRACE
-/// eCrash_Uninit();
- #endif
-}
-
-
-
-pid_t current_child;
-void graceful_shutdown(int signum) {
- kill(current_child, signum);
- unlink(file_pid_file);
- exit(0);
-}
-
-int nFireUps = 0;
-int nFireUpsNonRestart = 0;
-pid_t ForkedPid = 1;
-
-/*
- * Start running as a daemon.
- */
-void start_daemon(int unused) {
- int status = 0;
- pid_t child = 0;
- FILE *fp;
- int do_restart = 0;
-
- current_child = 0;
-
- /* Close stdin/stdout/stderr and replace them with /dev/null.
- * We don't just call close() because we don't want these fd's
- * to be reused for other files.
- */
- if (chdir(ctdl_run_dir) != 0)
- syslog(LOG_EMERG,
- "unable to change into directory [%s]: %s",
- ctdl_run_dir, strerror(errno));
-
- child = fork();
- if (child != 0) {
- exit(0);
- }
-
- signal(SIGHUP, SIG_IGN);
- signal(SIGINT, SIG_IGN);
- signal(SIGQUIT, SIG_IGN);
-
- setsid();
- umask(0);
- if ((freopen("/dev/null", "r", stdin) != stdin) ||
- (freopen("/dev/null", "w", stdout) != stdout) ||
- (freopen("/dev/null", "w", stderr) != stderr))
- syslog(LOG_EMERG,
- "unable to reopen stdin/out/err %s",
- strerror(errno));
-
-
- do {
- current_child = fork();
-
- signal(SIGTERM, graceful_shutdown);
-
- if (current_child < 0) {
- perror("fork");
- exit(errno);
- }
-
- else if (current_child == 0) {
- return; /* continue starting citadel. */
- }
-
- else {
- fp = fopen(file_pid_file, "w");
- if (fp != NULL) {
- fprintf(fp, ""F_PID_T"\n", getpid());
- fclose(fp);
- }
- waitpid(current_child, &status, 0);
- }
-
- nFireUpsNonRestart = nFireUps;
-
- /* Exit code 0 means the watcher should exit */
- if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
- do_restart = 0;
- }
-
- /* Exit code 101-109 means the watcher should exit */
- else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
- do_restart = 0;
- }
-
- /* Any other exit code, or no exit code, means we should restart. */
- else {
- do_restart = 1;
- nFireUps++;
- ForkedPid = current_child;
- }
-
- } while (do_restart);
-
- unlink(file_pid_file);
- exit(WEXITSTATUS(status));
-}
-
-
-
-void checkcrash(void)
-{
- if (nFireUpsNonRestart != nFireUps)
- {
- StrBuf *CrashMail;
-
- CrashMail = NewStrBuf();
- syslog(LOG_ALERT, "Posting crash message\n");
- StrBufPrintf(CrashMail,
- " \n"
- " The Citadel server process (citserver) terminated unexpectedly."
- "\n \n"
- " This could be the result of a bug in the server program, or some external "
- "factor.\n \n"
- " You can obtain more information about this by enabling core dumps.\n \n"
- " For more information, please see:\n \n"
- " http://citadel.org/doku.php?id=faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
- "\n \n"
-
- " If you have already done this, the core dump is likely to be found at %score.%d\n"
- ,
- ctdl_run_dir, ForkedPid);
- CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
- FreeStrBuf(&CrashMail);
- }
-}
-
-
-/*
- * Generic routine to convert a login name to a full name (gecos)
- * Returns nonzero if a conversion took place
- */
-int convert_login(char NameToConvert[]) {
- struct passwd *pw;
- unsigned int a;
-
- pw = getpwnam(NameToConvert);
- if (pw == NULL) {
- return(0);
- }
- else {
- strcpy(NameToConvert, pw->pw_gecos);
- for (a=0; a<strlen(NameToConvert); ++a) {
- if (NameToConvert[a] == ',') NameToConvert[a] = 0;
- }
- return(1);
- }
-}
-
-
-
-void HuntBadSession(void)
-{
- int highest;
- CitContext *ptr;
- fd_set readfds;
- struct timeval tv;
- struct ServiceFunctionHook *serviceptr;
-
-
-
- /* Next, add all of the client sockets. */
- begin_critical_section(S_SESSION_TABLE);
- for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
- if ((ptr->state == CON_SYS) && (ptr->client_socket == 0))
- continue;
- /* Initialize the fdset. */
- FD_ZERO(&readfds);
- highest = 0;
- tv.tv_sec = 0; /* wake up every second if no input */
- tv.tv_usec = 0;
-
- /* Don't select on dead sessions, only truly idle ones */
- if ( (ptr->state == CON_IDLE)
- && (ptr->kill_me == 0)
- && (ptr->client_socket > 0)
- ) {
- FD_SET(ptr->client_socket, &readfds);
- if (ptr->client_socket > highest)
- highest = ptr->client_socket;
-
- if ((select(highest + 1, &readfds, NULL, NULL, &tv) < 0) &&
- (errno == EBADF))
- {
- /* Gotcha! */
- syslog(LOG_EMERG,
- "Killing Session CC[%d] bad FD: [%d:%d] User[%s] Host[%s:%s]\n",
- ptr->cs_pid,
- ptr->client_socket,
- ptr->is_local_socket,
- ptr->curr_user,
- ptr->cs_host,ptr->cs_addr);
-
- ptr->kill_me = 1;
- ptr->client_socket = -1;
- break;
- }
- }
-
- }
- end_critical_section(S_SESSION_TABLE);
-
-
- /* First, add the various master sockets to the fdset. */
- for (serviceptr = ServiceHookTable; serviceptr != NULL; serviceptr = serviceptr->next ) {
-
- /* Initialize the fdset. */
- highest = 0;
- tv.tv_sec = 0; /* wake up every second if no input */
- tv.tv_usec = 0;
-
- FD_SET(serviceptr->msock, &readfds);
- if (serviceptr->msock > highest) {
- highest = serviceptr->msock;
- }
- if ((select(highest + 1, &readfds, NULL, NULL, &tv) < 0) &&
- (errno == EBADF))
- {
- /* Gotcha! server socket dead? commit suicide! */
- syslog(LOG_EMERG,
- "Found bad FD: %d and its a server socket! Shutting Down!\n",
- serviceptr->msock);
-
- server_shutting_down = 1;
- break;
- }
- }
-
-
-}
-
-const char *WorkerLogStr = "W";
-/*
- * This loop just keeps going and going and going...
- */
-void *worker_thread(void *blah) {
- int highest;
- CitContext *ptr;
- CitContext *bind_me = NULL;
- fd_set readfds;
- int retval = 0;
- struct timeval tv;
- int force_purge = 0;
- struct ServiceFunctionHook *serviceptr;
- int ssock; /* Descriptor for client socket */
- CitContext *con = NULL; /* Temporary context pointer */
- int i;
-
- pthread_mutex_lock(&ThreadCountMutex);
- ++num_workers;
- pthread_mutex_unlock(&ThreadCountMutex);
-
- pthread_setspecific(evConKey, WorkerLogStr);
-
- while (!server_shutting_down) {
-
- /* make doubly sure we're not holding any stale db handles
- * which might cause a deadlock.
- */
- cdb_check_handles();
-do_select: force_purge = 0;
- bind_me = NULL; /* Which session shall we handle? */
-
- /* Initialize the fdset. */
- FD_ZERO(&readfds);
- highest = 0;
-
- /* First, add the various master sockets to the fdset. */
- for (serviceptr = ServiceHookTable; serviceptr != NULL; serviceptr = serviceptr->next ) {
- FD_SET(serviceptr->msock, &readfds);
- if (serviceptr->msock > highest) {
- highest = serviceptr->msock;
- }
- }
-
- /* Next, add all of the client sockets. */
- begin_critical_section(S_SESSION_TABLE);
- for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
- if ((ptr->state == CON_SYS) && (ptr->client_socket == 0))
- continue;
-
- /* Don't select on dead sessions, only truly idle ones */
- if ( (ptr->state == CON_IDLE)
- && (ptr->kill_me == 0)
- && (ptr->client_socket > 0)
- ) {
- FD_SET(ptr->client_socket, &readfds);
- if (ptr->client_socket > highest)
- highest = ptr->client_socket;
- }
- if ((bind_me == NULL) && (ptr->state == CON_READY)) {
- bind_me = ptr;
- ptr->state = CON_EXECUTING;
- break;
- }
- if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
- bind_me = ptr;
- ptr->state = CON_STARTING;
- break;
- }
- }
- end_critical_section(S_SESSION_TABLE);
-
- if (bind_me) {
- goto SKIP_SELECT;
- }
-
- /* If we got this far, it means that there are no sessions
- * which a previous thread marked for attention, so we go
- * ahead and get ready to select().
- */
-
- if (!server_shutting_down) {
- tv.tv_sec = 1; /* wake up every second if no input */
- tv.tv_usec = 0;
- retval = select(highest + 1, &readfds, NULL, NULL, &tv);
- }
- else {
- --num_workers;
- return NULL;
- }
-
- /* Now figure out who made this select() unblock.
- * First, check for an error or exit condition.
- */
- if (retval < 0) {
- if (errno == EBADF) {
- syslog(LOG_EMERG, "select() failed: (%s)\n", strerror(errno));
- HuntBadSession ();
- goto do_select;
- }
- if (errno != EINTR) {
- syslog(LOG_EMERG, "Exiting (%s)\n", strerror(errno));
- server_shutting_down = 1;
- continue;
- } else {
-#if 0
- syslog(LOG_DEBUG, "Interrupted select()\n");
-#endif
- if (server_shutting_down) {
- --num_workers;
- return(NULL);
- }
- goto do_select;
- }
- }
- else if (retval == 0) {
- if (server_shutting_down) {
- --num_workers;
- return(NULL);
- }
- }
-
- /* Next, check to see if it's a new client connecting * on a master socket. */
-
- else if ((retval > 0) && (!server_shutting_down)) for (serviceptr = ServiceHookTable; serviceptr != NULL; serviceptr = serviceptr->next) {
-
- if (FD_ISSET(serviceptr->msock, &readfds)) {
- ssock = accept(serviceptr->msock, NULL, 0);
- if (ssock >= 0) {
- syslog(LOG_DEBUG, "New client socket %d", ssock);
-
- /* The master socket is non-blocking but the client
- * sockets need to be blocking, otherwise certain
- * operations barf on FreeBSD. Not a fatal error.
- */
- if (fcntl(ssock, F_SETFL, 0) < 0) {
- syslog(LOG_EMERG,
- "citserver: Can't set socket to blocking: %s\n",
- strerror(errno));
- }
-
- /* New context will be created already
- * set up in the CON_EXECUTING state.
- */
- con = CreateNewContext();
-
- /* Assign our new socket number to it. */
- con->tcp_port = serviceptr->tcp_port;
- con->client_socket = ssock;
- con->h_command_function = serviceptr->h_command_function;
- con->h_async_function = serviceptr->h_async_function;
- con->h_greeting_function = serviceptr->h_greeting_function;
- con->ServiceName = serviceptr->ServiceName;
-
- /* Determine whether it's a local socket */
- if (serviceptr->sockpath != NULL) {
- con->is_local_socket = 1;
- }
-
- /* Set the SO_REUSEADDR socket option */
- i = 1;
- setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
- con->state = CON_GREETING;
- retval--;
- if (retval == 0)
- break;
- }
- }
- }
-
- /* It must be a client socket. Find a context that has data
- * waiting on its socket *and* is in the CON_IDLE state. Any
- * active sockets other than our chosen one are marked as
- * CON_READY so the next thread that comes around can just bind
- * to one without having to select() again.
- */
- begin_critical_section(S_SESSION_TABLE);
- for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
- int checkfd = ptr->client_socket;
- if ((checkfd != -1) && (ptr->state == CON_IDLE) ){
- if (FD_ISSET(checkfd, &readfds)) {
- ptr->input_waiting = 1;
- if (!bind_me) {
- bind_me = ptr; /* I choose you! */
- bind_me->state = CON_EXECUTING;
- }
- else {
- ptr->state = CON_READY;
- }
- } else if ((ptr->is_async) && (ptr->async_waiting) && (ptr->h_async_function)) {
- if (!bind_me) {
- bind_me = ptr; /* I choose you! */
- bind_me->state = CON_EXECUTING;
- }
- else {
- ptr->state = CON_READY;
- }
- }
- }
- }
- end_critical_section(S_SESSION_TABLE);
-
-SKIP_SELECT:
- /* We're bound to a session */
- pthread_mutex_lock(&ThreadCountMutex);
- ++active_workers;
- pthread_mutex_unlock(&ThreadCountMutex);
-
- if (bind_me != NULL) {
- become_session(bind_me);
-
- if (bind_me->state == CON_STARTING) {
- bind_me->state = CON_EXECUTING;
- begin_session(bind_me);
- bind_me->h_greeting_function();
- }
- /* If the client has sent a command, execute it. */
- if (CC->input_waiting) {
- CC->h_command_function();
-
- while (HaveMoreLinesWaiting(CC))
- CC->h_command_function();
-
- CC->input_waiting = 0;
- }
-
- /* If there are asynchronous messages waiting and the
- * client supports it, do those now */
- if ((CC->is_async) && (CC->async_waiting)
- && (CC->h_async_function != NULL)) {
- CC->h_async_function();
- CC->async_waiting = 0;
- }
-
- force_purge = CC->kill_me;
- become_session(NULL);
- bind_me->state = CON_IDLE;
- }
-
- dead_session_purge(force_purge);
- do_housekeeping();
-
- pthread_mutex_lock(&ThreadCountMutex);
- --active_workers;
- if ((active_workers + config.c_min_workers < num_workers) &&
- (num_workers > config.c_min_workers))
- {
- num_workers--;
- pthread_mutex_unlock(&ThreadCountMutex);
- return (NULL);
- }
- pthread_mutex_unlock(&ThreadCountMutex);
- }
-
- /* If control reaches this point, the server is shutting down */
- pthread_mutex_lock(&ThreadCountMutex);
- --num_workers;
- pthread_mutex_unlock(&ThreadCountMutex);
- return(NULL);
-}
-
-
-
-/*
- * SyslogFacility()
- * Translate text facility name to syslog.h defined value.
- */
-int SyslogFacility(char *name)
-{
- int i;
- struct
- {
- int facility;
- char *name;
- } facTbl[] =
- {
- { LOG_KERN, "kern" },
- { LOG_USER, "user" },
- { LOG_MAIL, "mail" },
- { LOG_DAEMON, "daemon" },
- { LOG_AUTH, "auth" },
- { LOG_SYSLOG, "syslog" },
- { LOG_LPR, "lpr" },
- { LOG_NEWS, "news" },
- { LOG_UUCP, "uucp" },
- { LOG_LOCAL0, "local0" },
- { LOG_LOCAL1, "local1" },
- { LOG_LOCAL2, "local2" },
- { LOG_LOCAL3, "local3" },
- { LOG_LOCAL4, "local4" },
- { LOG_LOCAL5, "local5" },
- { LOG_LOCAL6, "local6" },
- { LOG_LOCAL7, "local7" },
- { 0, NULL }
- };
- for(i = 0; facTbl[i].name != NULL; i++) {
- if(!strcasecmp(name, facTbl[i].name))
- return facTbl[i].facility;
- }
- return LOG_DAEMON;
-}
projects / citadel.git / blobdiff