/*
- * webserver.c
+ * $Id$
*
* This contains a simple multithreaded TCP server manager. It sits around
* waiting on the specified port for incoming HTTP connections. When a
* connection is established, it calls context_loop() from context_loop.c.
*
- * $Id$
*/
-#include <ctype.h>
-#include <stdlib.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <stdio.h>
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/socket.h>
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif
-#ifdef HAVE_LIMITS_H
-#include <limits.h>
-#endif
-#include <netinet/in.h>
-#include <netdb.h>
-#include <string.h>
-#include <pwd.h>
-#include <errno.h>
-#include <stdarg.h>
-#include <pthread.h>
#include "webcit.h"
+#include "webserver.h"
+
+#if HAVE_BACKTRACE
+#include <execinfo.h>
+#endif
#ifndef HAVE_SNPRINTF
-int vsnprintf (char *buf, size_t max, const char *fmt, va_list argp);
+int vsnprintf(char *buf, size_t max, const char *fmt, va_list argp);
#endif
-int msock; /* master listening socket */
+int verbosity = 9; /* Logging level */
+int msock; /* master listening socket */
+int is_https = 0; /* Nonzero if I am an HTTPS service */
+int follow_xff = 0; /* Follow X-Forwarded-For: header */
+int home_specified = 0; /* did the user specify a homedir? */
+int time_to_die = 0; /* Nonzero if server is shutting down */
extern void *context_loop(int);
-extern pthread_mutex_t MasterCritter;
+extern void *housekeeping_loop(void);
+extern pthread_mutex_t SessionListMutex;
+extern pthread_key_t MyConKey;
+
+
+char ctdl_key_dir[PATH_MAX]=SSL_DIR;
+char file_crpt_file_key[PATH_MAX]="";
+char file_crpt_file_csr[PATH_MAX]="";
+char file_crpt_file_cer[PATH_MAX]="";
+
+char socket_dir[PATH_MAX]; /* where to talk to our citadel server */
+static const char editor_absolut_dir[PATH_MAX]=EDITORDIR; /* nailed to what configure gives us. */
+static char static_dir[PATH_MAX]; /* calculated on startup */
+static char static_local_dir[PATH_MAX]; /* calculated on startup */
+static char static_icon_dir[PATH_MAX]; /* where should we find our mime icons? */
+char *static_dirs[]={ /* needs same sort order as the web mapping */
+ (char*)static_dir, /* our templates on disk */
+ (char*)static_local_dir, /* user provided templates disk */
+ (char*)editor_absolut_dir, /* the editor on disk */
+ (char*)static_icon_dir /* our icons... */
+};
/*
+ * Subdirectories from which the client may request static content
+ *
+ * (If you add more, remember to increment 'ndirs' below)
+ */
+char *static_content_dirs[] = {
+ "static", /** static templates */
+ "static.local", /** site local static templates */
+ "tiny_mce" /** rich text editor */
+};
+
+int ndirs=3;
+
+
+char *server_cookie = NULL; /* our Cookie connection to the client */
+int http_port = PORT_NUM; /* Port to listen on */
+char *ctdlhost = DEFAULT_HOST; /* our name */
+char *ctdlport = DEFAULT_PORT; /* our Port */
+int setup_wizard = 0; /* should we run the setup wizard? \todo */
+char wizard_filename[PATH_MAX]; /* where's the setup wizard? */
+int running_as_daemon = 0; /* should we deamonize on startup? */
+
+
+/*
* 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.
+ *
+ * ip_addr IP address to bind
+ * port_number port number to bind
+ * queue_len number of incoming connections to allow in the queue
*/
-int ig_tcp_server(int port_number, int queue_len)
+int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
{
struct sockaddr_in sin;
int s, i;
- struct linger WebLinger = { 1, 9000 };
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = INADDR_ANY;
+ if (ip_addr == NULL) {
+ sin.sin_addr.s_addr = INADDR_ANY;
+ } else {
+ sin.sin_addr.s_addr = inet_addr(ip_addr);
+ }
+
+ if (sin.sin_addr.s_addr == INADDR_NONE) {
+ sin.sin_addr.s_addr = INADDR_ANY;
+ }
if (port_number == 0) {
- printf("webcit: Cannot start: no port number specified.\n");
- exit(1);
- }
-
- sin.sin_port = htons((u_short)port_number);
+ lprintf(1, "Cannot start: no port number specified.\n");
+ exit(WC_EXIT_BIND);
+ }
+ sin.sin_port = htons((u_short) port_number);
s = socket(PF_INET, SOCK_STREAM, (getprotobyname("tcp")->p_proto));
if (s < 0) {
- printf("webcit: Can't create a socket: %s\n",
- strerror(errno));
- exit(errno);
- }
-
+ lprintf(1, "Can't create a socket: %s\n", strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
/* Set some socket options that make sense. */
i = 1;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
- setsockopt(s, SOL_SOCKET, SO_LINGER, &WebLinger, sizeof(WebLinger));
-
- if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
- printf("webcit: Can't bind: %s\n", strerror(errno));
- exit(errno);
- }
+ fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
+ there should be a preceding F_GETFL
+ and a bitwise OR with the previous
+ fd flags */
+
+ if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
+ lprintf(1, "Can't bind: %s\n", strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
if (listen(s, queue_len) < 0) {
- printf("webcit: Can't listen: %s\n", strerror(errno));
- exit(errno);
- }
-
- return(s);
+ lprintf(1, "Can't listen: %s\n", strerror(errno));
+ exit(WC_EXIT_BIND);
}
+ return (s);
+}
+
/*
- * client_write() ... Send binary data to the client.
+ * \brief Create a Unix domain socket and listen on it
+ * \param sockpath file name of the unix domain socket
+ * \param queue_len Number of incoming connections to allow in the queue
*/
-void client_write(int sock, char *buf, int nbytes)
+int ig_uds_server(char *sockpath, int queue_len)
{
- int bytes_written = 0;
- int retval;
- while (bytes_written < nbytes) {
- retval = write(sock, &buf[bytes_written],
- nbytes - bytes_written);
- if (retval < 1) {
- printf("client_write() failed: %s\n",
- strerror(errno));
- pthread_exit(NULL);
- }
- bytes_written = bytes_written + retval;
- }
+ struct sockaddr_un addr;
+ int s;
+ int i;
+ int actual_queue_len;
+
+ actual_queue_len = queue_len;
+ if (actual_queue_len < 5) actual_queue_len = 5;
+
+ i = unlink(sockpath);
+ if (i != 0) if (errno != ENOENT) {
+ lprintf(1, "webserver: can't unlink %s: %s\n",
+ sockpath, strerror(errno));
+ exit(WC_EXIT_BIND);
}
+ 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) {
+ lprintf(1, "webserver: Can't create a socket: %s\n",
+ strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+
+ if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+ lprintf(1, "webserver: Can't bind: %s\n",
+ strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+
+ if (listen(s, actual_queue_len) < 0) {
+ lprintf(1, "webserver: Can't listen: %s\n",
+ strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+
+ chmod(sockpath, 0777);
+ return(s);
+}
+
-/*
- * cprintf() ... Send formatted printable data to the client. It is
- * implemented in terms of client_write() but remains in
- * sysdep.c in case we port to somewhere without va_args...
- */
-void cprintf(int sock, const char *format, ...) {
- va_list arg_ptr;
- char buf[256];
-
- va_start(arg_ptr, format);
- if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
- buf[sizeof buf - 2] = '\n';
- client_write(sock, buf, strlen(buf));
- va_end(arg_ptr);
- }
/*
- * Read data from the client socket.
- * Return values are:
- * 1 Requested number of bytes has been read.
- * 0 Request timed out.
- * If the socket breaks, the session is immediately terminated.
+ * \brief Read data from the client socket.
+ * \param sock socket fd to read from
+ * \param buf buffer to read into
+ * \param bytes number of bytes to read
+ * \param timeout Number of seconds to wait before timing out
+ * \return values are\
+ * 1 Requested number of bytes has been read.\
+ * 0 Request timed out.\
+ * -1 Connection is broken, or other error.
*/
int client_read_to(int sock, char *buf, int bytes, int timeout)
{
- int len,rlen;
+ int len, rlen;
fd_set rfds;
struct timeval tv;
int retval;
+
+#ifdef HAVE_OPENSSL
+ if (is_https) {
+ return (client_read_ssl(buf, bytes, timeout));
+ }
+#endif
+
len = 0;
- while(len<bytes) {
+ while (len < bytes) {
FD_ZERO(&rfds);
FD_SET(sock, &rfds);
tv.tv_sec = timeout;
tv.tv_usec = 0;
- retval = select( (sock)+1,
- &rfds, NULL, NULL, &tv);
+ retval = select((sock) + 1, &rfds, NULL, NULL, &tv);
if (FD_ISSET(sock, &rfds) == 0) {
- return(0);
- }
+ return (0);
+ }
- rlen = read(sock, &buf[len], bytes-len);
- if (rlen<1) {
- printf("client_read() failed: %s\n",
+ rlen = read(sock, &buf[len], bytes - len);
+
+ if (rlen < 1) {
+ lprintf(2, "client_read() failed: %s\n",
strerror(errno));
- pthread_exit(NULL);
- }
+ return (-1);
+ }
len = len + rlen;
+ }
+
+#ifdef HTTP_TRACING
+ write(2, "\033[32m", 5);
+ write(2, buf, bytes);
+ write(2, "\033[30m", 5);
+#endif
+ return (1);
+}
+
+/*
+ * \brief write data to the client
+ * \param buf data to write to the client
+ * \param count size of buffer
+ */
+ssize_t client_write(const void *buf, size_t count)
+{
+ char *newptr;
+ size_t newalloc;
+ size_t bytesWritten = 0;
+ ssize_t res;
+ fd_set wset;
+ int fdflags;
+
+ if (WC->burst != NULL) {
+ if ((WC->burst_len + count) >= WC->burst_alloc) {
+ newalloc = (WC->burst_alloc * 2);
+ if ((WC->burst_len + count) >= newalloc) {
+ newalloc += count;
+ }
+ newptr = realloc(WC->burst, newalloc);
+ if (newptr != NULL) {
+ WC->burst = newptr;
+ WC->burst_alloc = newalloc;
+ }
+ }
+ if ((WC->burst_len + count) < WC->burst_alloc) {
+ memcpy(&WC->burst[WC->burst_len], buf, count);
+ WC->burst_len += count;
+ return (count);
+ }
+ else {
+ return(-1);
+ }
+ }
+#ifdef HAVE_OPENSSL
+ if (is_https) {
+ client_write_ssl((char *) buf, count);
+ return (count);
+ }
+#endif
+#ifdef HTTP_TRACING
+ write(2, "\033[34m", 5);
+ write(2, buf, count);
+ write(2, "\033[30m", 5);
+#endif
+ fdflags = fcntl(WC->http_sock, F_GETFL);
+
+ while (bytesWritten < count) {
+ if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
+ FD_ZERO(&wset);
+ FD_SET(WC->http_sock, &wset);
+ if (select(1, NULL, &wset, NULL, NULL) == -1) {
+ lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
+ return -1;
+ }
+ }
+
+ if ((res = write(WC->http_sock, (char*)buf + bytesWritten,
+ count - bytesWritten)) == -1) {
+ lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
+ return res;
+ }
+ bytesWritten += res;
+ }
+
+ return bytesWritten;
+}
+
+/*
+ * \brief Begin buffering HTTP output so we can transmit it all in one write operation later.
+ */
+void begin_burst(void)
+{
+ if (WC->burst != NULL) {
+ free(WC->burst);
+ WC->burst = NULL;
+ }
+ WC->burst_len = 0;
+ WC->burst_alloc = 32768;
+ WC->burst = malloc(WC->burst_alloc);
+}
+
+
+/*
+ * \brief uses the same calling syntax as compress2(), but it
+ * creates a stream compatible with HTTP "Content-encoding: gzip"
+ */
+#ifdef HAVE_ZLIB
+#define DEF_MEM_LEVEL 8 /*< memlevel??? */
+#define OS_CODE 0x03 /*< unix */
+int ZEXPORT compress_gzip(Bytef * dest, /*< compressed buffer*/
+ size_t * destLen, /*< length of the compresed data */
+ const Bytef * source, /*< source to encode */
+ uLong sourceLen, /*< length of source to encode */
+ int level) /*< compression level */
+{
+ const int gz_magic[2] = { 0x1f, 0x8b }; /* gzip magic header */
+
+ /* write gzip header */
+ snprintf((char *) dest, *destLen,
+ "%c%c%c%c%c%c%c%c%c%c",
+ gz_magic[0], gz_magic[1], Z_DEFLATED,
+ 0 /*flags */ , 0, 0, 0, 0 /*time */ , 0 /* xflags */ ,
+ OS_CODE);
+
+ /* normal deflate */
+ z_stream stream;
+ int err;
+ stream.next_in = (Bytef *) source;
+ stream.avail_in = (uInt) sourceLen;
+ stream.next_out = dest + 10L; // after header
+ stream.avail_out = (uInt) * destLen;
+ if ((uLong) stream.avail_out != *destLen)
+ return Z_BUF_ERROR;
+
+ stream.zalloc = (alloc_func) 0;
+ stream.zfree = (free_func) 0;
+ stream.opaque = (voidpf) 0;
+
+ err = deflateInit2(&stream, level, Z_DEFLATED, -MAX_WBITS,
+ DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
+ if (err != Z_OK)
+ return err;
+
+ err = deflate(&stream, Z_FINISH);
+ if (err != Z_STREAM_END) {
+ deflateEnd(&stream);
+ return err == Z_OK ? Z_BUF_ERROR : err;
+ }
+ *destLen = stream.total_out + 10L;
+
+ /* write CRC and Length */
+ uLong crc = crc32(0L, source, sourceLen);
+ int n;
+ for (n = 0; n < 4; ++n, ++*destLen) {
+ dest[*destLen] = (int) (crc & 0xff);
+ crc >>= 8;
+ }
+ uLong len = stream.total_in;
+ for (n = 0; n < 4; ++n, ++*destLen) {
+ dest[*destLen] = (int) (len & 0xff);
+ len >>= 8;
+ }
+ err = deflateEnd(&stream);
+ return err;
+}
+#endif
+
+/*
+ * \brief Finish buffering HTTP output. [Compress using zlib and] output with a Content-Length: header.
+ */
+void end_burst(void)
+{
+ size_t the_len;
+ char *the_data;
+
+ if (WC->burst == NULL)
+ return;
+
+ the_len = WC->burst_len;
+ the_data = WC->burst;
+
+ WC->burst_len = 0;
+ WC->burst_alloc = 0;
+ WC->burst = NULL;
+
+#ifdef HAVE_ZLIB
+ /* Perform gzip compression, if enabled and supported by client */
+ if (WC->gzip_ok) {
+ char *compressed_data = NULL;
+ size_t compressed_len;
+
+ compressed_len = ((the_len * 101) / 100) + 100;
+ compressed_data = malloc(compressed_len);
+
+ if (compress_gzip((Bytef *) compressed_data,
+ &compressed_len,
+ (Bytef *) the_data,
+ (uLongf) the_len, Z_BEST_SPEED) == Z_OK) {
+ wprintf("Content-encoding: gzip\r\n");
+ free(the_data);
+ the_data = compressed_data;
+ the_len = compressed_len;
+ } else {
+ free(compressed_data);
}
- return(1);
}
+#endif /* HAVE_ZLIB */
+
+ wprintf("Content-length: %d\r\n\r\n", the_len);
+ client_write(the_data, the_len);
+ free(the_data);
+ return;
+}
+
+
/*
- * Read data from the client socket with default timeout.
+ * \brief 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)
+ * \param sock the socket fd to read from
+ * \param buf the buffer to write to
+ * \param bytes Number of bytes to read
*/
int client_read(int sock, char *buf, int bytes)
{
- return(client_read_to(sock, buf, bytes, SLEEPING));
- }
+ return (client_read_to(sock, buf, bytes, SLEEPING));
+}
/*
- * client_gets() ... Get a LF-terminated line of text from the client.
+ * \brief 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)
+ * \param sock socket fd to get client line from
+ * \param buf buffer to write read data to
+ * \param bufsiz how many bytes to read
+ * \return number of bytes read???
*/
-int client_gets(int sock, char *buf)
+int client_getln(int sock, char *buf, int bufsiz)
{
int i, retval;
- /* Read one character at a time.
- */
- for (i = 0;;i++) {
+ /* Read one character at a time.*/
+ for (i = 0;; i++) {
retval = client_read(sock, &buf[i], 1);
- if (retval != 1 || buf[i] == '\n' || i == 255)
+ if (retval != 1 || buf[i] == '\n' || i == (bufsiz-1))
break;
+ if ( (!isspace(buf[i])) && (!isprint(buf[i])) ) {
+ /* Non printable character recieved from client */
+ return(-1);
}
+ }
- /* If we got a long line, discard characters until the newline.
- */
- if (i == 255)
+ /* If we got a long line, discard characters until the newline. */
+ if (i == (bufsiz-1))
while (buf[i] != '\n' && retval == 1)
retval = client_read(sock, &buf[i], 1);
/*
- * Strip any trailing not-printable characters.
+ * Strip any trailing non-printable characters.
*/
buf[i] = 0;
- while ((strlen(buf)>0)&&(!isprint(buf[strlen(buf)-1]))) {
- buf[strlen(buf)-1] = 0;
- }
- return(retval);
+ while ((i > 0) && (!isprint(buf[i - 1]))) {
+ buf[--i] = 0;
}
+ return (retval);
+}
+/*
+ * \brief shut us down the regular way.
+ * param signum the signal we want to forward
+ */
+pid_t current_child;
+void graceful_shutdown_watcher(int signum) {
+ lprintf (1, "bye; shutting down watcher.");
+ kill(current_child, signum);
+ if (signum != SIGHUP)
+ exit(0);
+}
/*
- * Start running as a daemon. Only close stdio if do_close_stdio is set.
+ * \brief shut us down the regular way.
+ * param signum the signal we want to forward
*/
-void start_daemon(int do_close_stdio) {
- if (do_close_stdio) {
- /* close(0); */
- close(1);
- close(2);
+pid_t current_child;
+void graceful_shutdown(int signum) {
+// kill(current_child, signum);
+ char wd[SIZ];
+ FILE *FD;
+ int fd;
+ getcwd(wd, SIZ);
+ lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
+ fd = msock;
+ msock = -1;
+ time_to_die = 1;
+ FD=fdopen(fd, "a+");
+ fflush (FD);
+ fclose (FD);
+ close(fd);
+}
+
+
+/*
+ * \brief Start running as a daemon.
+ *
+ * param do_close_stdio Only close stdio if set.
+ */
+
+/*
+ * Start running as a daemon.
+ */
+void start_daemon(char *pid_file)
+{
+ 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.
+ */
+ chdir("/");
+
+ signal(SIGHUP, SIG_IGN);
+ signal(SIGINT, SIG_IGN);
+ signal(SIGQUIT, SIG_IGN);
+
+ child = fork();
+ if (child != 0) {
+ exit(0);
+ }
+
+ setsid();
+ umask(0);
+ freopen("/dev/null", "r", stdin);
+ freopen("/dev/null", "w", stdout);
+ freopen("/dev/null", "w", stderr);
+ signal(SIGTERM, graceful_shutdown_watcher);
+ signal(SIGHUP, graceful_shutdown_watcher);
+
+ do {
+ current_child = fork();
+
+
+ if (current_child < 0) {
+ perror("fork");
+ exit(errno);
+ }
+
+ else if (current_child == 0) { // child process
+// signal(SIGTERM, graceful_shutdown);
+ signal(SIGHUP, graceful_shutdown);
+
+ return; /* continue starting webcit. */
+ }
+
+ else { // watcher process
+// signal(SIGTERM, SIG_IGN);
+// signal(SIGHUP, SIG_IGN);
+ if (pid_file) {
+ fp = fopen(pid_file, "w");
+ if (fp != NULL) {
+ fprintf(fp, "%d\n", getpid());
+ fclose(fp);
+ }
+ }
+ waitpid(current_child, &status, 0);
+ }
+
+ do_restart = 0;
+
+ /* Did the main process exit with an actual exit code? */
+ if (WIFEXITED(status)) {
+
+ /* Exit code 0 means the watcher should exit */
+ if (WEXITSTATUS(status) == 0) {
+ do_restart = 0;
+ }
+
+ /* Exit code 101-109 means the watcher should exit */
+ else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
+ do_restart = 0;
+ }
+
+ /* Any other exit code means we should restart. */
+ else {
+ do_restart = 1;
+ }
}
- signal(SIGHUP,SIG_IGN);
- signal(SIGINT,SIG_IGN);
- signal(SIGQUIT,SIG_IGN);
- if (fork()!=0) exit(0);
+
+ /* Any other type of termination (signals, etc.) should also restart. */
+ else {
+ do_restart = 1;
+ }
+
+ } while (do_restart);
+
+ if (pid_file) {
+ unlink(pid_file);
}
+ exit(WEXITSTATUS(status));
+}
/*
- * Issue an HTTP Redirect header
- * url must be a complete url (with http://)
+ * \brief Spawn an additional worker thread into the pool.
*/
-void redirect(char *url) {
- printf("Location: %s\n\n", url);
-}
+void spawn_another_worker_thread()
+{
+ pthread_t SessThread; /*< Thread descriptor */
+ pthread_attr_t attr; /*< Thread attributes */
+ int ret;
+
+ lprintf(3, "Creating a new thread\n");
+
+ /* set attributes for the new thread */
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+
+ /*
+ * Our per-thread stacks need to be bigger than the default size, otherwise
+ * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
+ * 64-bit Linux.
+ */
+ if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
+ lprintf(1, "pthread_attr_setstacksize: %s\n",
+ strerror(ret));
+ pthread_attr_destroy(&attr);
+ }
-const char *defaulthost = DEFAULT_HOST;
-const char *defaultport = DEFAULT_PORT;
+ /* now create the thread */
+ if (pthread_create(&SessThread, &attr,
+ (void *(*)(void *)) worker_entry, NULL)
+ != 0) {
+ lprintf(1, "Can't create thread: %s\n", strerror(errno));
+ }
+
+ /* free up the attributes */
+ pthread_attr_destroy(&attr);
+}
/*
- * Here's where it all begins.
+ * \brief Here's where it all begins.
+ * \param argc number of commandline args
+ * \param argv the commandline arguments
*/
int main(int argc, char **argv)
{
- struct sockaddr_in fsin; /* Data for master socket */
- int alen; /* Data for master socket */
- int ssock; /* Descriptor for master socket */
- pthread_t SessThread; /* Thread descriptor */
- pthread_attr_t attr; /* Thread attributes */
- int a, i; /* General-purpose variables */
- int port = PORT_NUM; /* Port to listen on */
+ pthread_t SessThread; /*< Thread descriptor */
+ pthread_attr_t attr; /*< Thread attributes */
+ int a, i; /*< General-purpose variables */
+ char tracefile[PATH_MAX];
+ char ip_addr[256]="0.0.0.0";
+ char dirbuffer[PATH_MAX]="";
+ int relh=0;
+ int home=0;
+ int home_specified=0;
+ char relhome[PATH_MAX]="";
+ char webcitdir[PATH_MAX] = DATADIR;
+ char *pidfile = NULL;
+ char *hdir;
+ const char *basedir;
+#ifdef ENABLE_NLS
+ char *locale = NULL;
+ char *mo = NULL;
+#endif /* ENABLE_NLS */
+ char uds_listen_path[PATH_MAX]; /*< listen on a unix domain socket? */
+
+ /* Ensure that we are linked to the correct version of libcitadel */
+ if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
+ fprintf(stderr, " You are running libcitadel version %d.%02d\n",
+ (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
+ fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
+ (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
+ return(1);
+ }
+
+ strcpy(uds_listen_path, "");
/* Parse command line */
- while ((a = getopt(argc, argv, "hp:")) != EOF)
+#ifdef HAVE_OPENSSL
+ while ((a = getopt(argc, argv, "h:i:p:t:x:dD:cfs")) != EOF)
+#else
+ while ((a = getopt(argc, argv, "h:i:p:t:x:dD:cf")) != EOF)
+#endif
switch (a) {
- case 'p':
- port = atoi(optarg);
+ case 'h':
+ hdir = strdup(optarg);
+ relh=hdir[0]!='/';
+ if (!relh) safestrncpy(webcitdir, hdir,
+ sizeof webcitdir);
+ else
+ safestrncpy(relhome, relhome,
+ sizeof relhome);
+ /* free(hdir); TODO: SHOULD WE DO THIS? */
+ home_specified = 1;
+ home=1;
+ break;
+ case 'd':
+ running_as_daemon = 1;
+ break;
+ case 'D':
+ pidfile = strdup(optarg);
+ running_as_daemon = 1;
+ break;
+ case 'i':
+ safestrncpy(ip_addr, optarg, sizeof ip_addr);
+ break;
+ case 'p':
+ http_port = atoi(optarg);
+ if (http_port == 0) {
+ safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
+ }
+ break;
+ case 't':
+ safestrncpy(tracefile, optarg, sizeof tracefile);
+ freopen(tracefile, "w", stdout);
+ freopen(tracefile, "w", stderr);
+ freopen(tracefile, "r", stdin);
+ break;
+ case 'x':
+ verbosity = atoi(optarg);
+ break;
+ case 'f':
+ follow_xff = 1;
+ break;
+ case 'c':
+ server_cookie = malloc(256);
+ if (server_cookie != NULL) {
+ safestrncpy(server_cookie,
+ "Set-cookie: wcserver=",
+ 256);
+ if (gethostname
+ (&server_cookie[strlen(server_cookie)],
+ 200) != 0) {
+ lprintf(2, "gethostname: %s\n",
+ strerror(errno));
+ free(server_cookie);
+ }
+ }
+ break;
+ case 's':
+ is_https = 1;
break;
- default:
- fprintf(stderr, "usage: webserver [-p localport] "
+ default:
+ fprintf(stderr, "usage: webserver "
+ "[-i ip_addr] [-p http_port] "
+ "[-t tracefile] [-c] [-f] "
+ "[-d] "
+#ifdef HAVE_OPENSSL
+ "[-s] "
+#endif
"[remotehost [remoteport]]\n");
return 1;
- }
+ }
if (optind < argc) {
- defaulthost = argv[optind];
+ ctdlhost = argv[optind];
if (++optind < argc)
- defaultport = argv[optind];
- }
-
+ ctdlport = argv[optind];
+ }
+
+ /* daemonize, if we were asked to */
+ if (running_as_daemon) {
+ start_daemon(pidfile);
+ }
+ else {
+/// signal(SIGTERM, graceful_shutdown);
+ signal(SIGHUP, graceful_shutdown);
+ }
+
/* Tell 'em who's in da house */
- printf("WebCit v2 experimental\n");
- printf("Copyright (C) 1996-1998 by Art Cancro. ");
- printf("All rights reserved.\n\n");
+ lprintf(1, PACKAGE_STRING "\n");
+ lprintf(1, "Copyright (C) 1996-2008 by the Citadel development team.\n"
+ "This software is distributed under the terms of the "
+ "GNU General Public License.\n\n"
+ );
+
+
+ /* initialize the International Bright Young Thing */
+#ifdef ENABLE_NLS
+ initialize_locales();
+
+ locale = setlocale(LC_ALL, "");
+
+ mo = malloc(strlen(webcitdir) + 20);
+ lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
+ free(mo);
+ lprintf(9, "Text domain: %s\n", textdomain("webcit"));
+ lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
+ preset_locale();
+#endif
+
+
+ /* calculate all our path on a central place */
+ /* where to keep our config */
+
+#define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
+ snprintf(SUBDIR,sizeof SUBDIR, "%s%s%s%s%s%s%s", \
+ (home&!relh)?webcitdir:basedir, \
+ ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
+ ((basedir!=webcitdir)&(home&!relh))?"/":"", \
+ relhome, \
+ (relhome[0]!='\0')?"/":"",\
+ dirbuffer,\
+ (dirbuffer[0]!='\0')?"/":"");
+ basedir=RUNDIR;
+ COMPUTE_DIRECTORY(socket_dir);
+ basedir=WWWDIR "/static";
+ COMPUTE_DIRECTORY(static_dir);
+ basedir=WWWDIR "/static/icons";
+ COMPUTE_DIRECTORY(static_icon_dir);
+ basedir=WWWDIR "/static.local";
+ COMPUTE_DIRECTORY(static_local_dir);
+
+ snprintf(file_crpt_file_key,
+ sizeof file_crpt_file_key,
+ "%s/citadel.key",
+ ctdl_key_dir);
+ snprintf(file_crpt_file_csr,
+ sizeof file_crpt_file_csr,
+ "%s/citadel.csr",
+ ctdl_key_dir);
+ snprintf(file_crpt_file_cer,
+ sizeof file_crpt_file_cer,
+ "%s/citadel.cer",
+ ctdl_key_dir);
+
+ /* we should go somewhere we can leave our coredump, if enabled... */
+ lprintf(9, "Changing directory to %s\n", socket_dir);
+ if (chdir(webcitdir) != 0) {
+ perror("chdir");
+ }
+ LoadIconDir(static_icon_dir);
+ initialize_viewdefs();
+ initialize_axdefs();
+
+ /*
+ * Set up a place to put thread-specific data.
+ * We only need a single pointer per thread - it points to the
+ * wcsession struct to which the thread is currently bound.
+ */
+ if (pthread_key_create(&MyConKey, NULL) != 0) {
+ lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
+ }
+ InitialiseSemaphores ();
+
+ /*
+ * Set up a place to put thread-specific SSL data.
+ * We don't stick this in the wcsession struct because SSL starts
+ * up before the session is bound, and it gets torn down between
+ * transactions.
+ */
+#ifdef HAVE_OPENSSL
+ if (pthread_key_create(&ThreadSSL, NULL) != 0) {
+ lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
+ }
+#endif
/*
- * Bind the server to our favourite port.
+ * Bind the server to our favorite port.
* There is no need to check for errors, because ig_tcp_server()
* exits if it doesn't succeed.
*/
- printf("Attempting to bind to port %d...\n", port);
- msock = ig_tcp_server(port, 5);
- printf("Listening on socket %d\n", msock);
-
- pthread_mutex_init(&MasterCritter, NULL);
-
- /*
- * Endless loop. Listen on the master socket. When a connection
- * comes in, create a socket, a context, and a thread.
- */
- while (1) {
- ssock = accept(msock, (struct sockaddr *)&fsin, &alen);
- printf("New connection on socket %d\n", ssock);
- if (ssock < 0) {
- printf("webcit: accept() failed: %s\n",
- strerror(errno));
+
+ if (!IsEmptyStr(uds_listen_path)) {
+ lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
+ msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
+ }
+ else {
+ lprintf(2, "Attempting to bind to port %d...\n", http_port);
+ msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
+ }
+
+ lprintf(2, "Listening on socket %d\n", msock);
+ signal(SIGPIPE, SIG_IGN);
+
+ pthread_mutex_init(&SessionListMutex, NULL);
+
+ /*
+ * Start up the housekeeping thread
+ */
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+ pthread_create(&SessThread, &attr,
+ (void *(*)(void *)) housekeeping_loop, NULL);
+
+
+ /*
+ * If this is an HTTPS server, fire up SSL
+ */
+#ifdef HAVE_OPENSSL
+ if (is_https) {
+ init_ssl();
+ }
+#endif
+
+ /* Start a few initial worker threads */
+ for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
+ spawn_another_worker_thread();
+ }
+
+ /* now the original thread becomes another worker */
+ worker_entry();
+ return 0;
+}
+
+
+/*
+ * Entry point for worker threads
+ */
+void worker_entry(void)
+{
+ int ssock;
+ int i = 0;
+ int fail_this_transaction = 0;
+ int ret;
+ struct timeval tv;
+ fd_set readset, tempset;
+
+ tv.tv_sec = 0;
+ tv.tv_usec = 10000;
+ FD_ZERO(&readset);
+ FD_SET(msock, &readset);
+
+ do {
+ /* Only one thread can accept at a time */
+ fail_this_transaction = 0;
+ ssock = -1;
+ errno = EAGAIN;
+ do {
+ ret = -1; /* just one at once should select... */
+ begin_critical_section(S_SELECT);
+
+ FD_ZERO(&tempset);
+ if (msock > 0) FD_SET(msock, &tempset);
+ tv.tv_sec = 0;
+ tv.tv_usec = 10000;
+ if (msock > 0) ret = select(msock+1, &tempset, NULL, NULL, &tv);
+ end_critical_section(S_SELECT);
+ if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
+ {// EINTR and EAGAIN are thrown but not of interest.
+ lprintf(2, "accept() failed:%d %s\n",
+ errno, strerror(errno));
}
- else {
+ else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
+ {// Successfully selected, and still not shutting down? Accept!
+ ssock = accept(msock, NULL, 0);
+ }
+
+ } while ((msock > 0) && (ssock < 0) && (time_to_die == 0));
+
+ if ((msock == -1)||(time_to_die))
+ {// ok, we're going down.
+ int shutdown = 0;
+
+ /* the first to come here will have to do the cleanup.
+ * make shure its realy just one.
+ */
+ begin_critical_section(S_SHUTDOWN);
+ if (msock == -1)
+ {
+ msock = -2;
+ shutdown = 1;
+ }
+ end_critical_section(S_SHUTDOWN);
+ if (shutdown == 1)
+ {// we're the one to cleanup the mess.
+ lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
+ shutdown_sessions();
+ lprintf(2, "master shutdown: waiting for others\n");
+ sleeeeeeeeeep(1); // wait so some others might finish...
+ lprintf(2, "master shutdown: cleaning up sessions\n");
+ do_housekeeping();
+ lprintf(2, "master shutdown: cleaning up libical\n");
+ free_zone_directory ();
+ icaltimezone_release_zone_tab ();
+ icalmemory_free_ring ();
+ lprintf(2, "master shutdown exiting!.\n");
+ exit(0);
+ }
+ break;
+ }
+ if (ssock < 0 ) continue;
+
+ if (msock < 0) {
+ if (ssock > 0) close (ssock);
+ lprintf(2, "inbetween.");
+ pthread_exit(NULL);
+ } else { // Got it? do some real work!
/* Set the SO_REUSEADDR socket option */
i = 1;
setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
- &i, sizeof(i));
-
- /* set attributes for the new thread */
- pthread_attr_init(&attr);
- pthread_attr_setdetachstate(&attr,
- PTHREAD_CREATE_DETACHED);
-
- /* now create the thread */
- if (pthread_create(&SessThread, &attr,
- (void* (*)(void*)) context_loop,
- (void*) ssock)
- != 0) {
- printf("webcit: can't create thread: %s\n",
- strerror(errno));
+ &i, sizeof(i));
+
+ /* If we are an HTTPS server, go crypto now. */
+#ifdef HAVE_OPENSSL
+ if (is_https) {
+ if (starttls(ssock) != 0) {
+ fail_this_transaction = 1;
+ close(ssock);
}
+ }
+#endif
+
+ if (fail_this_transaction == 0) {
+
+ /* Perform an HTTP transaction... */
+ context_loop(ssock);
+ /* Shut down SSL/TLS if required... */
+#ifdef HAVE_OPENSSL
+ if (is_https) {
+ endtls();
+ }
+#endif
+
+ /* ...and close the socket. */
+ lingering_close(ssock);
}
+
}
+
+ } while (!time_to_die);
+
+ lprintf (1, "bye\n");
+ pthread_exit(NULL);
+}
+
+/*
+ * \brief logprintf. log messages
+ * logs to stderr if loglevel is lower than the verbosity set at startup
+ * \param loglevel level of the message
+ * \param format the printf like format string
+ * \param ... the strings to put into format
+ */
+int lprintf(int loglevel, const char *format, ...)
+{
+ va_list ap;
+
+ if (loglevel <= verbosity) {
+ va_start(ap, format);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+ fflush(stderr);
}
+ return 1;
+}
+
+
+/*
+ * \brief print the actual stack frame.
+ */
+void wc_backtrace(void)
+{
+#ifdef HAVE_BACKTRACE
+ void *stack_frames[50];
+ size_t size, i;
+ char **strings;
+
+
+ size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
+ strings = backtrace_symbols(stack_frames, size);
+ for (i = 0; i < size; i++) {
+ if (strings != NULL)
+ lprintf(1, "%s\n", strings[i]);
+ else
+ lprintf(1, "%p\n", stack_frames[i]);
+ }
+ free(strings);
+#endif
+}
+/*@}*/