#include "webcit.h"
#include "webserver.h"
+#include "modules_init.h"
/* Only one thread may manipulate SessionList at a time... */
pthread_mutex_t SessionListMutex;
-struct wcsession *SessionList = NULL;
+wcsession *SessionList = NULL; /**< our sessions ????*/
-pthread_key_t MyConKey; /* TSD key for MySession() */
+pthread_key_t MyConKey; /**< TSD key for MySession() */
-void free_attachments(struct wcsession *sess) {
- struct wc_attachment *att;
- while (sess->first_attachment != NULL) {
- att = sess->first_attachment;
- sess->first_attachment = sess->first_attachment->next;
- free(att->data);
- free(att);
+void DestroySession(wcsession **sessions_to_kill)
+{
+ close((*sessions_to_kill)->serv_sock);
+ close((*sessions_to_kill)->chat_sock);
+/*
+// if ((*sessions_to_kill)->preferences != NULL) {
+// free((*sessions_to_kill)->preferences);
+// }
+*/
+ if ((*sessions_to_kill)->cache_fold != NULL) {
+ free((*sessions_to_kill)->cache_fold);
}
+ DeleteServInfo(&((*sessions_to_kill)->serv_info));
+ free_march_list((*sessions_to_kill));
+
+ session_destroy_modules(*sessions_to_kill);
+
+ free((*sessions_to_kill));
+ (*sessions_to_kill) = NULL;
}
+void shutdown_sessions(void)
+{
+ wcsession *sptr;
+
+ for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
+ sptr->killthis = 1;
+ }
+}
void do_housekeeping(void)
{
- struct wcsession *sptr, *ss;
- struct wcsession *sessions_to_kill = NULL;
+ wcsession *sptr, *ss;
+ wcsession *sessions_to_kill = NULL;
int num_sessions = 0;
static int num_threads = MIN_WORKER_THREADS;
- /*
+ /**
* Lock the session list, moving any candidates for euthanasia into
* a separate list.
*/
for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
++num_sessions;
- /* Kill idle sessions */
+ /** Kill idle sessions */
if ((time(NULL) - (sptr->lastreq)) >
(time_t) WEBCIT_TIMEOUT) {
sptr->killthis = 1;
}
- /* Remove sessions flagged for kill */
+ /** Remove sessions flagged for kill */
if (sptr->killthis) {
- /* remove session from linked list */
+ /** remove session from linked list */
if (sptr == SessionList) {
SessionList = SessionList->next;
}
}
pthread_mutex_unlock(&SessionListMutex);
- /*
+ /**
* Now free up and destroy the culled sessions.
*/
while (sessions_to_kill != NULL) {
lprintf(3, "Destroying session %d\n", sessions_to_kill->wc_session);
pthread_mutex_lock(&sessions_to_kill->SessionMutex);
- close(sessions_to_kill->serv_sock);
- close(sessions_to_kill->chat_sock);
- if (sessions_to_kill->preferences != NULL) {
- free(sessions_to_kill->preferences);
- }
- free_attachments(sessions_to_kill);
pthread_mutex_unlock(&sessions_to_kill->SessionMutex);
sptr = sessions_to_kill->next;
- free(sessions_to_kill);
+
+ DestroySession(&sessions_to_kill);
sessions_to_kill = sptr;
--num_sessions;
}
- /*
+ /**
* If there are more sessions than threads, then we should spawn
* more threads ... up to a predefined maximum.
*/
}
-/*
+/*
* Wake up occasionally and clean house
*/
void housekeeping_loop(void)
/*
+ * Create a Session id
* Generate a unique WebCit session ID (which is not the same thing as the
* Citadel session ID).
- *
- * FIXME ... ensure that session number is truly unique
- *
*/
int GenerateSessionID(void)
{
}
-/*
- * Collapse multiple cookies on one line
- */
-int req_gets(int sock, char *buf, char *hold)
-{
- int a;
-
- if (strlen(hold) == 0) {
- strcpy(buf, "");
- a = client_getln(sock, buf, SIZ);
- if (a<1) return(-1);
- } else {
- safestrncpy(buf, hold, SIZ);
- }
- strcpy(hold, "");
-
- if (!strncasecmp(buf, "Cookie: ", 8)) {
- for (a = 0; a < strlen(buf); ++a)
- if (buf[a] == ';') {
- sprintf(hold, "Cookie: %s", &buf[a + 1]);
- buf[a] = 0;
- while (isspace(hold[8]))
- strcpy(&hold[8], &hold[9]);
- return(0);
- }
- }
-
- return(0);
-}
-
/*
* lingering_close() a`la Apache. see
* http://www.apache.org/docs/misc/fin_wait_2.html for rationale
*/
-
int lingering_close(int fd)
{
char buf[SIZ];
/*
- * Check for bogus requests coming from (for example) brain-dead
- * Windoze boxes that are infected with the latest worm-of-the-week.
- * If we detect one of these, bail out without bothering our Citadel
- * server.
+ * Look for commonly-found probes of malware such as worms, viruses, trojans, and Microsoft Office.
+ * Short-circuit these requests so we don't have to send them through the full processing loop.
*/
-int is_bogus(char *http_cmd) {
-
- if (!strncasecmp(http_cmd, "GET /scripts/root.exe", 21)) return(1);
- if (!strncasecmp(http_cmd, "GET /c/winnt", 12)) return(2);
- if (!strncasecmp(http_cmd, "GET /MSADC/", 11)) return(3);
+int is_bogus(StrBuf *http_cmd) {
+ const char *url;
+ int i, max;
+ const char *bogus_prefixes[] = {
+ "/scripts/root.exe", /* Worms and trojans and viruses, oh my! */
+ "/c/winnt",
+ "/MSADC/",
+ "/_vti", /* Broken Microsoft DAV implementation */
+ "/MSOffice", /* Stoopid MSOffice thinks everyone is IIS */
+ "/nonexistenshit" /* Exploit found in the wild January 2009 */
+ };
+
+ url = ChrPtr(http_cmd);
+ if (IsEmptyStr(url)) return(1);
+ ++url;
+
+ max = sizeof(bogus_prefixes) / sizeof(char *);
+
+ for (i=0; i<max; ++i) {
+ if (!strncasecmp(url, bogus_prefixes[i], strlen(bogus_prefixes[i]))) {
+ return(2);
+ }
+ }
return(0); /* probably ok */
}
+/*const char *nix(void *vptr) {return ChrPtr( (StrBuf*)vptr);}*/
/*
+ * handle one request
+ *
* This loop gets called once for every HTTP connection made to WebCit. At
* this entry point we have an HTTP socket with a browser allegedly on the
* other end, but we have not yet bound to a WebCit session.
* function returns, the worker thread is then free to handle another
* transaction.
*/
-void context_loop(int sock)
+void context_loop(int *sock)
{
- struct httprequest *req = NULL;
- struct httprequest *last = NULL;
- struct httprequest *hptr;
- char buf[SIZ], hold[SIZ];
+ const char *Pos = NULL;
+ const char *buf;
int desired_session = 0;
int got_cookie = 0;
int gzip_ok = 0;
- struct wcsession *TheSession, *sptr;
- char httpauth_string[SIZ];
- char httpauth_user[SIZ];
- char httpauth_pass[SIZ];
+ wcsession *TheSession, *sptr;
+ char httpauth_string[1024];
+ char httpauth_user[1024];
+ char httpauth_pass[1024];
+ int session_is_new = 0;
+ int nLine = 0;
+ int LineLen;
+ void *vLine;
+ StrBuf *Buf, *Line, *LastLine, *HeaderName, *ReqLine, *ReqType, *HTTPVersion;
+ const char *pch, *pchs, *pche;
+ HashList *HTTPHeaders;
strcpy(httpauth_string, "");
strcpy(httpauth_user, DEFAULT_HTTPAUTH_USER);
/*
* Find out what it is that the web browser is asking for
*/
- memset(hold, 0, sizeof(hold));
+ HeaderName = NewStrBuf();
+ Buf = NewStrBuf();
+ LastLine = NULL;
+ HTTPHeaders = NewHash(1, NULL);
+
+ /*
+ * Read in the request
+ */
do {
- if (req_gets(sock, buf, hold) < 0) return;
-
- /*
- * Can we compress?
- */
- if (!strncasecmp(buf, "Accept-encoding:", 16)) {
- if (strstr(&buf[16], "gzip")) {
- gzip_ok = 1;
- }
- }
+ nLine ++;
+ Line = NewStrBuf();
- /*
- * Browser-based sessions use cookies for session authentication
- */
- if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
- cookie_to_stuff(&buf[15], &desired_session,
- NULL, 0, NULL, 0, NULL, 0);
- got_cookie = 1;
- }
- /*
- * GroupDAV-based sessions use HTTP authentication
- */
- if (!strncasecmp(buf, "Authorization: Basic ", 21)) {
- CtdlDecodeBase64(httpauth_string, &buf[21], strlen(&buf[21]));
- extract_token(httpauth_user, httpauth_string, 0, ':', sizeof httpauth_user);
- extract_token(httpauth_pass, httpauth_string, 1, ':', sizeof httpauth_pass);
+ if (ClientGetLine(sock, Line, Buf, &Pos) < 0) return;
+
+ LineLen = StrLength(Line);
+
+ if (nLine == 1) {
+ ReqLine = Line;
+ continue;
+ }
+ if (LineLen == 0) {
+ FreeStrBuf(&Line);
+ continue;
}
- if (!strncasecmp(buf, "If-Modified-Since: ", 19)) {
- if_modified_since = httpdate_to_timestamp(&buf[19]);
+ /* Do we need to Unfold? */
+ if ((LastLine != NULL) &&
+ (isspace(*ChrPtr(Line)))) {
+ pch = pchs = ChrPtr(Line);
+ pche = pchs + StrLength(Line);
+ while (isspace(*pch) && (pch < pche))
+ pch ++;
+ StrBufCutLeft(Line, pch - pchs);
+ StrBufAppendBuf(LastLine, Line, 0);
+ FreeStrBuf(&Line);
+ continue;
}
- /*
- * Read in the request
- */
- hptr = (struct httprequest *)
- malloc(sizeof(struct httprequest));
- if (req == NULL)
- req = hptr;
- else
- last->next = hptr;
- hptr->next = NULL;
- last = hptr;
+ StrBufSanitizeAscii(Line, 'ยง');
+ StrBufExtract_token(HeaderName, Line, 0, ':');
- safestrncpy(hptr->line, buf, sizeof hptr->line);
+ pchs = ChrPtr(Line);
+ pch = pchs + StrLength(HeaderName) + 1;
+ pche = pchs + StrLength(Line);
+ while (isspace(*pch) && (pch < pche))
+ pch ++;
+ StrBufCutLeft(Line, pch - pchs);
- } while (strlen(buf) > 0);
+ StrBufUpCase(HeaderName);
+ Put(HTTPHeaders, SKEY(HeaderName), Line, HFreeStrBuf);
+ LastLine = Line;
+ } while (LineLen > 0);
+ FreeStrBuf(&HeaderName);
- safestrncpy(buf, req->line, sizeof buf);
- lprintf(5, "HTTP: %s\n", buf);
+/* dbg_PrintHash(HTTPHeaders, nix, NULL); */
+
+
+ /*
+ * Can we compress?
+ */
+ if (GetHash(HTTPHeaders, HKEY("ACCEPT-ENCODING"), &vLine) &&
+ (vLine != NULL)) {
+ buf = ChrPtr((StrBuf*)vLine);
+ if (strstr(&buf[16], "gzip")) {
+ gzip_ok = 1;
+ }
+ }
- /* Check for bogus requests */
- if (is_bogus(buf)) goto bail;
+ /*
+ * Browser-based sessions use cookies for session authentication
+ */
+ if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
+ (vLine != NULL)) {
+ cookie_to_stuff(vLine, &desired_session,
+ NULL, NULL, NULL);
+ got_cookie = 1;
+ }
/*
- * If requesting a non-root page, there should already be a cookie
- * set. If there isn't, the client browser has cookies turned off
- * (or doesn't support them) and we have to barf & bail.
+ * GroupDAV-based sessions use HTTP authentication
*/
- remove_token(buf, 0, ' ');
- if (buf[1]==' ') buf[1]=0;
+ if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
+ (vLine != NULL)) {
+ Line = (StrBuf*)vLine;
+ if (strncasecmp(ChrPtr(Line), "Basic", 5) == 0) {
+ StrBufCutLeft(Line, 6);
+ CtdlDecodeBase64(httpauth_string, ChrPtr(Line), StrLength(Line));
+ extract_token(httpauth_user, httpauth_string, 0, ':', sizeof httpauth_user);
+ extract_token(httpauth_pass, httpauth_string, 1, ':', sizeof httpauth_pass);
+ }
+ else
+ lprintf(1, "Authentication scheme not supported! [%s]\n", ChrPtr(Line));
+ }
+
+ if (GetHash(HTTPHeaders, HKEY("IF-MODIFIED-SINCE"), &vLine) &&
+ (vLine != NULL)) {
+ if_modified_since = httpdate_to_timestamp((StrBuf*)vLine);
+ }
+
+
+
+ ReqType = NewStrBuf();
+ HTTPVersion = NewStrBuf();
+ StrBufExtract_token(HTTPVersion, ReqLine, 2, ' ');
+ StrBufExtract_token(ReqType, ReqLine, 0, ' ');
+ StrBufCutLeft(ReqLine, StrLength(ReqType) + 1);
+ StrBufCutRight(ReqLine, StrLength(HTTPVersion) + 1);
/*
+ * If the request is prefixed by "/webcit" then chop that off. This
+ * allows a front end web server to forward all /webcit requests to us
+ * while still using the same web server port for other things.
+ */
+ if ( (StrLength(ReqLine) >= 8) && (strstr(ChrPtr(ReqLine), "/webcit/")) ) {
+ StrBufCutLeft(ReqLine, 7);
+ }
+
+ /* Begin parsing the request. */
+#ifdef TECH_PREVIEW
+ if ((strncmp(ChrPtr(ReqLine), "/sslg", 5) != 0) &&
+ (strncmp(ChrPtr(ReqLine), "/static/", 8) != 0) &&
+ (strncmp(ChrPtr(ReqLine), "/tiny_mce/", 10) != 0) &&
+ (strncmp(ChrPtr(ReqLine), "/wholist_section", 16) != 0) &&
+ (strstr(ChrPtr(ReqLine), "wholist_section") == NULL)) {
+#endif
+ lprintf(5, "HTTP: %s %s %s\n", ChrPtr(ReqType), ChrPtr(ReqLine), ChrPtr(HTTPVersion));
+#ifdef TECH_PREVIEW
+ }
+#endif
+
+ /** Check for bogus requests */
+ if ((StrLength(HTTPVersion) == 0) ||
+ (StrLength(ReqType) == 0) ||
+ is_bogus(ReqLine)) {
+ StrBufPlain(ReqLine, HKEY("/404 HTTP/1.1"));
+ StrBufPlain(ReqType, HKEY("GET"));
+ }
+ FreeStrBuf(&HTTPVersion);
+
+ /**
* While we're at it, gracefully handle requests for the
* robots.txt and favicon.ico files.
*/
- if (!strncasecmp(buf, "/robots.txt", 11)) {
- strcpy(req->line, "GET /static/robots.txt"
- "?force_close_session=yes HTTP/1.1");
+ if (!strncasecmp(ChrPtr(ReqLine), "/robots.txt", 11)) {
+ StrBufPlain(ReqLine,
+ HKEY("/static/robots.txt"
+ "?force_close_session=yes HTTP/1.1"));
+ StrBufPlain(ReqType, HKEY("GET"));
}
- else if (!strncasecmp(buf, "/favicon.ico", 12)) {
- strcpy(req->line, "GET /static/favicon.ico");
+ else if (!strncasecmp(ChrPtr(ReqLine), "/favicon.ico", 12)) {
+ StrBufPlain(ReqLine, HKEY("/static/favicon.ico"));
+ StrBufPlain(ReqType, HKEY("GET"));
}
- /* These are the URL's which may be executed without a
+ /**
+ * These are the URL's which may be executed without a
* session cookie already set. If it's not one of these,
* force the session to close because cookies are
* probably disabled on the client browser.
*/
- else if ( (strcmp(buf, "/"))
- && (strncasecmp(buf, "/listsub", 8))
- && (strncasecmp(buf, "/freebusy", 9))
- && (strncasecmp(buf, "/do_logout", 10))
- && (strncasecmp(buf, "/groupdav", 9))
- && (strncasecmp(buf, "/rss", 4))
+ else if ( (StrLength(ReqLine) > 1 )
+ && (strncasecmp(ChrPtr(ReqLine), "/listsub", 8))
+ && (strncasecmp(ChrPtr(ReqLine), "/freebusy", 9))
+ && (strncasecmp(ChrPtr(ReqLine), "/do_logout", 10))
+ && (strncasecmp(ChrPtr(ReqLine), "/groupdav", 9))
+ && (strncasecmp(ChrPtr(ReqLine), "/static", 7))
+ && (strncasecmp(ChrPtr(ReqLine), "/rss", 4))
+ && (strncasecmp(ChrPtr(ReqLine), "/404", 4))
&& (got_cookie == 0)) {
- strcpy(req->line, "GET /static/nocookies.html"
- "?force_close_session=yes HTTP/1.1");
+ StrBufPlain(ReqLine,
+ HKEY("/static/nocookies.html"
+ "?force_close_session=yes"));
}
- /*
+ /**
* See if there's an existing session open with the desired ID or user/pass
*/
TheSession = NULL;
if (TheSession == NULL) {
pthread_mutex_lock(&SessionListMutex);
- for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
-
- /* If HTTP-AUTH, look for a session with matching credentials */
- if ( (strlen(httpauth_user) > 0)
- &&(!strcasecmp(sptr->httpauth_user, httpauth_user))
- &&(!strcasecmp(sptr->httpauth_pass, httpauth_pass)) ) {
+ for (sptr = SessionList;
+ ((sptr != NULL) && (TheSession == NULL));
+ sptr = sptr->next) {
+
+ /** If HTTP-AUTH, look for a session with matching credentials */
+ if ( (!IsEmptyStr(httpauth_user))
+ &&(!strcasecmp(ChrPtr(sptr->httpauth_user), httpauth_user))
+ &&(!strcasecmp(ChrPtr(sptr->httpauth_pass), httpauth_pass)) ) {
TheSession = sptr;
}
- /* If cookie-session, look for a session with matching session ID */
+ /** If cookie-session, look for a session with matching session ID */
if ( (desired_session != 0) && (sptr->wc_session == desired_session)) {
TheSession = sptr;
}
pthread_mutex_unlock(&SessionListMutex);
}
- /*
+ /**
* Create a new session if we have to
*/
if (TheSession == NULL) {
lprintf(3, "Creating a new session\n");
- TheSession = (struct wcsession *)
- malloc(sizeof(struct wcsession));
- memset(TheSession, 0, sizeof(struct wcsession));
+ TheSession = (wcsession *)
+ malloc(sizeof(wcsession));
+ memset(TheSession, 0, sizeof(wcsession));
+ TheSession->headers = HTTPHeaders;
TheSession->serv_sock = (-1);
TheSession->chat_sock = (-1);
- TheSession->wc_session = GenerateSessionID();
- strcpy(TheSession->httpauth_user, httpauth_user);
- strcpy(TheSession->httpauth_pass, httpauth_pass);
- pthread_mutex_init(&TheSession->SessionMutex, NULL);
+
+ /* If we're recreating a session that expired, it's best to give it the same
+ * session number that it had before. The client browser ought to pick up
+ * the new session number and start using it, but in some rare situations it
+ * doesn't, and that's a Bad Thing because it causes lots of spurious sessions
+ * to get created.
+ */
+ if (desired_session == 0) {
+ TheSession->wc_session = GenerateSessionID();
+ }
+ else {
+ TheSession->wc_session = desired_session;
+ }
+
+ TheSession->httpauth_user = NewStrBufPlain(httpauth_user, -1);
+ TheSession->httpauth_pass = NewStrBufPlain(httpauth_user, -1);
+ pthread_setspecific(MyConKey, (void *)TheSession);
+ session_new_modules(TheSession);
+
+ pthread_mutex_init(&TheSession->SessionMutex, NULL);
pthread_mutex_lock(&SessionListMutex);
+ TheSession->nonce = rand();
TheSession->next = SessionList;
+ TheSession->is_mobile = -1;
SessionList = TheSession;
pthread_mutex_unlock(&SessionListMutex);
+ session_is_new = 1;
}
+ TheSession->headers = HTTPHeaders;
/*
* A future improvement might be to check the session integrity
*/
pthread_mutex_lock(&TheSession->SessionMutex); /* bind */
pthread_setspecific(MyConKey, (void *)TheSession);
- TheSession->http_sock = sock;
+
TheSession->lastreq = time(NULL); /* log */
+ TheSession->http_sock = *sock;
TheSession->gzip_ok = gzip_ok;
- session_loop(req); /* do transaction */
+
+ session_attach_modules(TheSession);
+
+ session_loop(ReqLine, ReqType, Buf, &Pos); /* do transaction */
+ session_detach_modules(TheSession);
+
+ TheSession->headers = NULL;
pthread_mutex_unlock(&TheSession->SessionMutex); /* unbind */
/* Free the request buffer */
-bail: while (req != NULL) {
- hptr = req->next;
- free(req);
- req = hptr;
- }
+ DeleteHash(&HTTPHeaders);
+ FreeStrBuf(&ReqLine);
+ FreeStrBuf(&ReqType);
+ FreeStrBuf(&Buf);
+}
- /* Free up any session-local substitution variables which
- * were set during this transaction
- */
- clear_local_substs();
+void tmplput_nonce(StrBuf *Target, WCTemplputParams *TP)
+{
+ wcsession *WCC = WC;
+ StrBufAppendPrintf(Target, "%ld",
+ (WCC != NULL)? WCC->nonce:0);
+}
+
+void tmplput_current_user(StrBuf *Target, WCTemplputParams *TP)
+{
+ StrBufAppendTemplate(Target, TP, WC->wc_fullname, 0);
+}
+
+void tmplput_current_room(StrBuf *Target, WCTemplputParams *TP)
+{
+ StrBufAppendTemplate(Target, TP, WC->wc_roomname, 0);
+}
+
+
+
+void
+InitModule_CONTEXT
+(void)
+{
+ RegisterNamespace("CURRENT_USER", 0, 1, tmplput_current_user, CTX_NONE);
+ RegisterNamespace("CURRENT_ROOM", 0, 1, tmplput_current_room, CTX_NONE);
+ RegisterNamespace("NONCE", 0, 0, tmplput_nonce, 0);
}
projects / citadel.git / blobdiff