/*
- * $Id$
- *
* This is the other half of the webserver. It handles the task of hooking
* up HTTP requests with the sessions they belong to, using HTTP cookies to
* keep track of things. If the HTTP request doesn't belong to any currently
* active session, a new session is started.
*
+ * Copyright (c) 1996-2011 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 as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "webcit.h"
#include "webserver.h"
+#include "modules_init.h"
/* Only one thread may manipulate SessionList at a time... */
pthread_mutex_t SessionListMutex;
-wcsession *SessionList = NULL; /**< our sessions ????*/
+wcsession *SessionList = NULL; /* Linked list of all webcit sessions */
-pthread_key_t MyConKey; /**< TSD key for MySession() */
+pthread_key_t MyConKey; /* TSD key for MySession() */
+HashList *HttpReqTypes = NULL;
+HashList *HttpHeaderHandler = NULL;
+extern HashList *HandlerHash;
+/* the following two values start at 1 because the initial parent thread counts as one. */
+int num_threads_existing = 1; /* Number of worker threads which exist. */
+int num_threads_executing = 1; /* Number of worker threads currently executing. */
+extern void session_loop(void);
+void spawn_another_worker_thread(void);
-void DestroySession(wcsession **sessions_to_kill)
+
+void DestroyHttpHeaderHandler(void *V)
{
- 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);
- }
- DeleteHash(&((*sessions_to_kill)->attachments));
- free_march_list((*sessions_to_kill));
- DeleteHash(&((*sessions_to_kill)->hash_prefs));
- DeleteHash(&((*sessions_to_kill)->IconBarSettings));
- DeleteHash(&((*sessions_to_kill)->ServCfg));
- FreeStrBuf(&((*sessions_to_kill)->UrlFragment1));
- FreeStrBuf(&((*sessions_to_kill)->UrlFragment2));
- FreeStrBuf(&((*sessions_to_kill)->UrlFragment3));
- FreeStrBuf(&((*sessions_to_kill)->WBuf));
- FreeStrBuf(&((*sessions_to_kill)->HBuf));
- FreeStrBuf(&((*sessions_to_kill)->CLineBuf));
- FreeStrBuf(&((*sessions_to_kill)->wc_username));
- FreeStrBuf(&((*sessions_to_kill)->wc_fullname));
- FreeStrBuf(&((*sessions_to_kill)->wc_password));
- FreeStrBuf(&((*sessions_to_kill)->wc_roomname));
- FreeStrBuf(&((*sessions_to_kill)->httpauth_user));
- FreeStrBuf(&((*sessions_to_kill)->httpauth_pass));
- free((*sessions_to_kill));
- (*sessions_to_kill) = NULL;
+ OneHttpHeader *pHdr;
+ pHdr = (OneHttpHeader*) V;
+ FreeStrBuf(&pHdr->Val);
+ free(pHdr);
}
void shutdown_sessions(void)
{
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.
*/
- pthread_mutex_lock(&SessionListMutex);
- num_sessions = 0;
+ CtdlLogResult(pthread_mutex_lock(&SessionListMutex));
for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
- ++num_sessions;
- /** Kill idle sessions */
- if ((time(NULL) - (sptr->lastreq)) >
- (time_t) WEBCIT_TIMEOUT) {
+ /* Kill idle sessions */
+ if ((time(NULL) - (sptr->lastreq)) > (time_t) WEBCIT_TIMEOUT) {
+ syslog(3, "Timeout session %d\n", sptr->wc_session);
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;
}
sessions_to_kill = sptr;
}
}
- pthread_mutex_unlock(&SessionListMutex);
+ CtdlLogResult(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);
- pthread_mutex_unlock(&sessions_to_kill->SessionMutex);
+ syslog(3, "Destroying session %d\n", sessions_to_kill->wc_session);
sptr = sessions_to_kill->next;
-
- DestroySession(&sessions_to_kill);
+ session_destroy_modules(&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.
- */
- while ( (num_sessions > num_threads)
- && (num_threads <= MAX_WORKER_THREADS) ) {
+/*
+ * Check the size of our thread pool. If all threads are executing, spawn another.
+ */
+void check_thread_pool_size(void)
+{
+ if (time_to_die) return; /* don't expand the thread pool during shutdown */
+
+ begin_critical_section(S_SPAWNER); /* only one of these should run at a time */
+ if (
+ (num_threads_executing >= num_threads_existing)
+ && (num_threads_existing < MAX_WORKER_THREADS)
+ ) {
+ syslog(3, "%d of %d threads are executing. Adding another worker thread.\n",
+ num_threads_executing,
+ num_threads_existing
+ );
spawn_another_worker_thread();
- ++num_threads;
- lprintf(3, "There are %d sessions and %d threads active.\n",
- num_sessions, num_threads);
}
+ end_critical_section(S_SPAWNER);
}
return ++seq;
}
-/*
- * Collapse multiple cookies on one line
- */
-int ReqGetStrBuf(int *sock, StrBuf *Target, StrBuf *buf)
+wcsession *FindSession(wcsession **wclist, ParsedHttpHdrs *Hdr, pthread_mutex_t *ListMutex)
{
+ wcsession *sptr = NULL;
+ wcsession *TheSession = NULL;
- return ClientGetLine(sock, Target, buf);
+ if (Hdr->HR.got_auth == AUTH_BASIC) {
+ GetAuthBasic(Hdr);
+ }
+
+ CtdlLogResult(pthread_mutex_lock(ListMutex));
+ for (sptr = *wclist; ((sptr != NULL) && (TheSession == NULL)); sptr = sptr->next) {
+
+ /* If HTTP-AUTH, look for a session with matching credentials */
+ switch (Hdr->HR.got_auth)
+ {
+ case AUTH_BASIC:
+ if ( (Hdr->HR.SessionKey != sptr->SessionKey))
+ continue;
+ if ((!strcasecmp(ChrPtr(Hdr->c_username), ChrPtr(sptr->wc_username))) &&
+ (!strcasecmp(ChrPtr(Hdr->c_password), ChrPtr(sptr->wc_password))) ) {
+ syslog(LOG_DEBUG, "-- matched a session with the same http-auth");
+ TheSession = sptr;
+ }
+ if (TheSession == NULL)
+ syslog(1, "found sessionkey [%d], but credentials for [%s|%s] didn't match",
+ Hdr->HR.SessionKey,
+ ChrPtr(Hdr->c_username),
+ ChrPtr(sptr->wc_username)
+ );
+ break;
+ case AUTH_COOKIE:
+ /* If cookie-session, look for a session with matching session ID */
+ if ( (Hdr->HR.desired_session != 0) &&
+ (sptr->wc_session == Hdr->HR.desired_session))
+ {
+ syslog(LOG_DEBUG, "-- matched a session with the same cookie");
+ TheSession = sptr;
+ }
+ break;
+ case NO_AUTH:
+ /* Any unbound session is a candidate */
+ if ( (sptr->wc_session == 0) && (sptr->inuse == 0) ) {
+ syslog(LOG_DEBUG, "-- reusing an unbound session");
+ TheSession = sptr;
+ }
+ break;
+ }
+ }
+ CtdlLogResult(pthread_mutex_unlock(ListMutex));
+ if (TheSession == NULL) {
+ syslog(1, "didn't find sessionkey [%d] for user [%s]",
+ Hdr->HR.SessionKey, ChrPtr(Hdr->c_username)
+ );
+ }
+ return TheSession;
}
+wcsession *CreateSession(int Lockable, int Static, wcsession **wclist, ParsedHttpHdrs *Hdr, pthread_mutex_t *ListMutex)
+{
+ wcsession *TheSession;
+ TheSession = (wcsession *) malloc(sizeof(wcsession));
+ memset(TheSession, 0, sizeof(wcsession));
+ TheSession->Hdr = Hdr;
+ TheSession->SessionKey = Hdr->HR.SessionKey;
+ TheSession->serv_sock = (-1);
+ pthread_setspecific(MyConKey, (void *)TheSession);
+
+ /* 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 (Hdr->HR.desired_session == 0) {
+ TheSession->wc_session = GenerateSessionID();
+ syslog(3, "Created new session %d", TheSession->wc_session);
+ }
+ else {
+ TheSession->wc_session = Hdr->HR.desired_session;
+ syslog(3, "Re-created session %d", TheSession->wc_session);
+ }
+ Hdr->HR.Static = Static;
+ session_new_modules(TheSession);
-/*
- * 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];
- int i;
- fd_set set;
- struct timeval tv, start;
+ if (Lockable) {
+ pthread_mutex_init(&TheSession->SessionMutex, NULL);
- gettimeofday(&start, NULL);
- shutdown(fd, 1);
- do {
- do {
- gettimeofday(&tv, NULL);
- tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
- tv.tv_usec = start.tv_usec - tv.tv_usec;
- if (tv.tv_usec < 0) {
- tv.tv_sec--;
- tv.tv_usec += 1000000;
- }
- FD_ZERO(&set);
- FD_SET(fd, &set);
- i = select(fd + 1, &set, NULL, NULL, &tv);
- } while (i == -1 && errno == EINTR);
+ if (ListMutex != NULL)
+ CtdlLogResult(pthread_mutex_lock(ListMutex));
- if (i <= 0)
- break;
+ if (wclist != NULL) {
+ TheSession->nonce = rand();
+ TheSession->next = *wclist;
+ *wclist = TheSession;
+ }
+ if (ListMutex != NULL)
+ CtdlLogResult(pthread_mutex_unlock(ListMutex));
+ }
+ return TheSession;
+}
- i = read(fd, buf, sizeof buf);
- } while (i != 0 && (i != -1 || errno == EINTR));
- return close(fd);
+/* If it's a "force 404" situation then display the error and bail. */
+void do_404(void)
+{
+ hprintf("HTTP/1.1 404 Not found\r\n");
+ hprintf("Content-Type: text/plain\r\n");
+ wc_printf("Not found\r\n");
+ end_burst();
}
+int ReadHttpSubject(ParsedHttpHdrs *Hdr, StrBuf *Line, StrBuf *Buf)
+{
+ const char *Args;
+ void *vLine, *vHandler;
+ const char *Pos = NULL;
+
+
+ Hdr->HR.ReqLine = Line;
+ /* The requesttype... GET, POST... */
+ StrBufExtract_token(Buf, Hdr->HR.ReqLine, 0, ' ');
+ if (GetHash(HttpReqTypes, SKEY(Buf), &vLine) &&
+ (vLine != NULL))
+ {
+ Hdr->HR.eReqType = *(long*)vLine;
+ }
+ else {
+ Hdr->HR.eReqType = eGET;
+ return 1;
+ }
+ StrBufCutLeft(Hdr->HR.ReqLine, StrLength(Buf) + 1);
+ /* the HTTP Version... */
+ StrBufExtract_token(Buf, Hdr->HR.ReqLine, 1, ' ');
+ StrBufCutRight(Hdr->HR.ReqLine, StrLength(Buf) + 1);
+
+ if (StrLength(Buf) == 0) {
+ Hdr->HR.eReqType = eGET;
+ return 1;
+ }
-/*
- * 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(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);
- }
+ StrBufAppendBuf(Hdr->this_page, Hdr->HR.ReqLine, 0);
+
+ /* chop Filename / query arguments */
+ Args = strchr(ChrPtr(Hdr->HR.ReqLine), '?');
+ if (Args == NULL) /* whe're not that picky about params... TODO: this will spoil '&' in filenames.*/
+ Args = strchr(ChrPtr(Hdr->HR.ReqLine), '&');
+ if (Args != NULL) {
+ Args ++; /* skip the ? */
+ StrBufPlain(Hdr->PlainArgs,
+ Args,
+ StrLength(Hdr->HR.ReqLine) -
+ (Args - ChrPtr(Hdr->HR.ReqLine)));
+ StrBufCutAt(Hdr->HR.ReqLine, 0, Args - 1);
+ } /* don't parse them yet, maybe we don't even care... */
+
+ /* now lookup what we are going to do with this... */
+ /* skip first slash */
+ StrBufExtract_NextToken(Buf, Hdr->HR.ReqLine, &Pos, '/');
+ do {
+ StrBufExtract_NextToken(Buf, Hdr->HR.ReqLine, &Pos, '/');
+
+ GetHash(HandlerHash, SKEY(Buf), &vHandler),
+ Hdr->HR.Handler = (WebcitHandler*) vHandler;
+ if (Hdr->HR.Handler == NULL)
+ break;
+ /*
+ * 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 ((Hdr->HR.Handler->Flags & URLNAMESPACE) != 0)
+ continue;
+ break;
+ } while (1);
+ /* remove the handlername from the URL */
+ if ((Pos != NULL) && (Pos != StrBufNOTNULL)){
+ StrBufCutLeft(Hdr->HR.ReqLine,
+ Pos - ChrPtr(Hdr->HR.ReqLine));
+ }
+
+ if (Hdr->HR.Handler != NULL) {
+ if ((Hdr->HR.Handler->Flags & BOGUS) != 0)
+ return 1;
+ Hdr->HR.DontNeedAuth = (
+ ((Hdr->HR.Handler->Flags & ISSTATIC) != 0) ||
+ ((Hdr->HR.Handler->Flags & ANONYMOUS) != 0)
+ );
+ }
+ else {
+ Hdr->HR.DontNeedAuth = 1; /* Flat request? show him the login screen... */
}
- return(0); /* probably ok */
+ return 0;
}
+int AnalyseHeaders(ParsedHttpHdrs *Hdr)
+{
+ OneHttpHeader *pHdr;
+ void *vHdr;
+ long HKLen;
+ const char *HashKey;
+ HashPos *at = GetNewHashPos(Hdr->HTTPHeaders, 0);
+
+ while (GetNextHashPos(Hdr->HTTPHeaders, at, &HKLen, &HashKey, &vHdr) &&
+ (vHdr != NULL)) {
+ pHdr = (OneHttpHeader *)vHdr;
+ if (pHdr->HaveEvaluator)
+ pHdr->H(pHdr->Val, Hdr);
-const char *nix(void *vptr) {return ChrPtr( (StrBuf*)vptr);}
+ }
+ DeleteHashPos(&at);
+ return 0;
+}
+
+/*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.
- *
- * The job of this function is to locate the correct session and bind to it,
- * or create a session if necessary and bind to it, then run the WebCit
- * transaction loop. Afterwards, we unbind from the session. When this
- * function returns, the worker thread is then free to handle another
- * transaction.
+ * Read in the request
*/
-void context_loop(int *sock)
+int ReadHTTPRequest (ParsedHttpHdrs *Hdr)
{
- const char *buf;
- int desired_session = 0;
- int got_cookie = 0;
- int gzip_ok = 0;
- 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;
- StrBuf *accept_language = NULL;
const char *pch, *pchs, *pche;
- HashList *HTTPHeaders;
-
- strcpy(httpauth_string, "");
- strcpy(httpauth_user, DEFAULT_HTTPAUTH_USER);
- strcpy(httpauth_pass, DEFAULT_HTTPAUTH_PASS);
+ OneHttpHeader *pHdr;
+ StrBuf *Line, *LastLine, *HeaderName;
+ int nLine = 0;
+ void *vF;
+ int isbogus = 0;
- /*
- * Find out what it is that the web browser is asking for
- */
HeaderName = NewStrBuf();
- Buf = NewStrBuf();
LastLine = NULL;
- HTTPHeaders = NewHash(1, NULL);
-
- /*
- * Read in the request
- */
do {
nLine ++;
- Line = NewStrBuf();
- if (ReqGetStrBuf(sock, Line, Buf) < 0) return;
+ Line = NewStrBufPlain(NULL, SIZ / 4);
- LineLen = StrLength(Line);
+ if (ClientGetLine(Hdr, Line) < 0) return 1;
- if (nLine == 1) {
- ReqLine = Line;
+ if (StrLength(Line) == 0) {
+ FreeStrBuf(&Line);
continue;
}
- if (LineLen == 0) {
- FreeStrBuf(&Line);
+ if (nLine == 1) {
+ Hdr->HTTPHeaders = NewHash(1, NULL);
+ pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
+ memset(pHdr, 0, sizeof(OneHttpHeader));
+ pHdr->Val = Line;
+ Put(Hdr->HTTPHeaders, HKEY("GET /"), pHdr, DestroyHttpHeaderHandler);
+ syslog(9, "%s\n", ChrPtr(Line));
+ isbogus = ReadHttpSubject(Hdr, Line, HeaderName);
+ if (isbogus) break;
continue;
}
pch ++;
StrBufCutLeft(Line, pch - pchs);
StrBufAppendBuf(LastLine, Line, 0);
+
FreeStrBuf(&Line);
continue;
}
+ StrBufSanitizeAscii(Line, '§');
StrBufExtract_token(HeaderName, Line, 0, ':');
- /*/// TODO: filter bad chars! */
pchs = ChrPtr(Line);
+ pche = pchs + StrLength(Line);
pch = pchs + StrLength(HeaderName) + 1;
pche = pchs + StrLength(Line);
- while (isspace(*pch) && (pch < pche))
+ while ((pch < pche) && isspace(*pch))
pch ++;
StrBufCutLeft(Line, pch - pchs);
StrBufUpCase(HeaderName);
- Put(HTTPHeaders, SKEY(HeaderName), Line, HFreeStrBuf);
+
+ pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
+ memset(pHdr, 0, sizeof(OneHttpHeader));
+ pHdr->Val = Line;
+
+ if (GetHash(HttpHeaderHandler, SKEY(HeaderName), &vF) &&
+ (vF != NULL))
+ {
+ OneHttpHeader *FHdr = (OneHttpHeader*) vF;
+ pHdr->H = FHdr->H;
+ pHdr->HaveEvaluator = 1;
+ }
+ Put(Hdr->HTTPHeaders, SKEY(HeaderName), pHdr, DestroyHttpHeaderHandler);
LastLine = Line;
- } while (LineLen > 0);
+ } while (Line != NULL);
+
FreeStrBuf(&HeaderName);
-/*/// dbg_PrintHash(HTTPHeaders, nix, NULL); */
+ return isbogus;
+}
+void OverrideRequest(ParsedHttpHdrs *Hdr, const char *Line, long len)
+{
+ StrBuf *Buf = NewStrBuf();
- /*
- * Can we compress?
- */
- if (GetHash(HTTPHeaders, HKEY("ACCEPT-ENCODING"), &vLine) &&
- (vLine != NULL)) {
- buf = ChrPtr((StrBuf*)vLine);
- if (strstr(&buf[16], "gzip")) {
- gzip_ok = 1;
- }
+ if (Hdr->HR.ReqLine != NULL) {
+ FlushStrBuf(Hdr->HR.ReqLine);
+ StrBufPlain(Hdr->HR.ReqLine, Line, len);
}
-
- /*
- * 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;
+ else {
+ Hdr->HR.ReqLine = NewStrBufPlain(Line, len);
}
+ ReadHttpSubject(Hdr, Hdr->HR.ReqLine, Buf);
+
+ FreeStrBuf(&Buf);
+}
+
+/*
+ * 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.
+ *
+ * The job of this function is to locate the correct session and bind to it,
+ * or create a session if necessary and bind to it, then run the WebCit
+ * transaction loop. Afterwards, we unbind from the session. When this
+ * function returns, the worker thread is then free to handle another
+ * transaction.
+ */
+void context_loop(ParsedHttpHdrs *Hdr)
+{
+ int isbogus = 0;
+ wcsession *TheSession;
+ struct timeval tx_start;
+ struct timeval tx_finish;
+ int session_may_be_reused = 1;
+
+ gettimeofday(&tx_start, NULL); /* start a stopwatch for performance timing */
/*
- * GroupDAV-based sessions use HTTP authentication
+ * Find out what it is that the web browser is asking for
*/
- 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));
+ isbogus = ReadHTTPRequest(Hdr);
+
+ Hdr->HR.dav_depth = 32767; /* TODO: find a general way to have non-0 defaults */
+
+ if (!isbogus) {
+ isbogus = AnalyseHeaders(Hdr);
}
- if (GetHash(HTTPHeaders, HKEY("IF-MODIFIED-SINCE"), &vLine) &&
- (vLine != NULL)) {
- if_modified_since = httpdate_to_timestamp((StrBuf*)vLine);
+ if ( (isbogus)
+ || ((Hdr->HR.Handler != NULL)
+ && ((Hdr->HR.Handler->Flags & BOGUS) != 0))
+ ) {
+ wcsession *Bogus;
+ Bogus = CreateSession(0, 1, NULL, Hdr, NULL);
+ do_404();
+ syslog(9, "HTTP: 404 [%ld.%06ld] %s %s \n",
+ ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
+ ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000,
+ ReqStrs[Hdr->HR.eReqType],
+ ChrPtr(Hdr->this_page)
+ );
+ session_detach_modules(Bogus);
+ session_destroy_modules(&Bogus);
+ return;
}
- if (GetHash(HTTPHeaders, HKEY("ACCEPT-LANGUAGE"), &vLine) &&
- (vLine != NULL)) {
- accept_language = (StrBuf*) vLine;
+ if ((Hdr->HR.Handler != NULL) && ((Hdr->HR.Handler->Flags & ISSTATIC) != 0))
+ {
+ wcsession *Static;
+ Static = CreateSession(0, 1, NULL, Hdr, NULL);
+
+ Hdr->HR.Handler->F();
+
+ /* How long did this transaction take? */
+ gettimeofday(&tx_finish, NULL);
+
+ syslog(9, "HTTP: 200 [%ld.%06ld] %s %s \n",
+ ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
+ ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000,
+ ReqStrs[Hdr->HR.eReqType],
+ ChrPtr(Hdr->this_page)
+ );
+ session_detach_modules(Static);
+ session_destroy_modules(&Static);
+ return;
}
+ if (Hdr->HR.got_auth == AUTH_BASIC) {
+ CheckAuthBasic(Hdr);
+ }
- 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 (Hdr->HR.got_auth) {
+ session_may_be_reused = 0;
+ }
/*
- * 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(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(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
- * 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 ( (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)) {
- 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 ( (!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 ( (desired_session != 0) && (sptr->wc_session == desired_session)) {
- TheSession = sptr;
- }
-
- }
- pthread_mutex_unlock(&SessionListMutex);
- }
+ TheSession = FindSession(&SessionList, Hdr, &SessionListMutex);
- /**
+ /*
* Create a new session if we have to
*/
if (TheSession == NULL) {
- lprintf(3, "Creating a new session\n");
- TheSession = (wcsession *)
- malloc(sizeof(wcsession));
- memset(TheSession, 0, sizeof(wcsession));
- TheSession->serv_sock = (-1);
- TheSession->chat_sock = (-1);
-
- /* 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();
+ TheSession = CreateSession(1, 0, &SessionList, Hdr, &SessionListMutex);
+
+ if ( (StrLength(Hdr->c_username) == 0)
+ && (!Hdr->HR.DontNeedAuth)
+ && (Hdr->HR.Handler != NULL)
+ && ((XHTTP_COMMANDS & Hdr->HR.Handler->Flags) == XHTTP_COMMANDS)
+ ) {
+ OverrideRequest(Hdr, HKEY("GET /401 HTTP/1.0"));
+ Hdr->HR.prohibit_caching = 1;
}
- else {
- TheSession->wc_session = desired_session;
- }
-
- if (TheSession->httpauth_user != NULL){
- FlushStrBuf(TheSession->httpauth_user);
- StrBufAppendBufPlain(TheSession->httpauth_user, httpauth_user, -1, 0);
- }
- else TheSession->httpauth_user = NewStrBufPlain(httpauth_user, -1);
- if (TheSession->httpauth_user != NULL){
- FlushStrBuf(TheSession->httpauth_pass);
- StrBufAppendBufPlain(TheSession->httpauth_pass, httpauth_user, -1, 0);
+
+ if (StrLength(Hdr->c_language) > 0) {
+ syslog(9, "Session cookie requests language '%s'\n", ChrPtr(Hdr->c_language));
+ set_selected_language(ChrPtr(Hdr->c_language));
+ go_selected_language();
}
- else TheSession->httpauth_pass = NewStrBufPlain(httpauth_user, -1);
-
- TheSession->hash_prefs = NewHash(1,NULL); /* Get a hash table for the user preferences */
- pthread_mutex_init(&TheSession->SessionMutex, NULL);
- pthread_mutex_lock(&SessionListMutex);
- TheSession->urlstrings = NULL;
- TheSession->vars = NULL;
- TheSession->nonce = rand();
- TheSession->WBuf = NULL;
- TheSession->CLineBuf = NewStrBuf();
- TheSession->next = SessionList;
- TheSession->is_mobile = -1;
- SessionList = TheSession;
- pthread_mutex_unlock(&SessionListMutex);
- session_is_new = 1;
}
/*
/*
* Bind to the session and perform the transaction
*/
- pthread_mutex_lock(&TheSession->SessionMutex); /* bind */
+ CtdlLogResult(pthread_mutex_lock(&TheSession->SessionMutex));
pthread_setspecific(MyConKey, (void *)TheSession);
- TheSession->urlstrings = NewHash(1,NULL);
- TheSession->vars = NewHash(1,NULL);
- TheSession->http_sock = *sock;
+ TheSession->inuse = 1; /* mark the session as bound */
TheSession->lastreq = time(NULL); /* log */
- TheSession->gzip_ok = gzip_ok;
-#ifdef ENABLE_NLS
- if (session_is_new) {
- httplang_to_locale(accept_language);
- }
- go_selected_language(); /* set locale */
-#endif
- session_loop(HTTPHeaders, ReqLine, ReqType, Buf); /* do transaction */
-#ifdef ENABLE_NLS
- stop_selected_language(); /* unset locale */
-#endif
- DeleteHash(&TheSession->summ);
- DeleteHash(&TheSession->urlstrings);
- DeleteHash(&TheSession->vars);
- FreeStrBuf(&TheSession->WBuf);
- FreeStrBuf(&TheSession->HBuf);
-
-
- pthread_mutex_unlock(&TheSession->SessionMutex); /* unbind */
+ TheSession->Hdr = Hdr;
- /* Free the request buffer */
- DeleteHash(&HTTPHeaders);
- FreeStrBuf(&ReqLine);
- FreeStrBuf(&ReqType);
- FreeStrBuf(&Buf);
- /*
- * Free up any session-local substitution variables which
- * were set during this transaction
+ session_attach_modules(TheSession);
+ session_loop(); /* do transaction */
+
+ /* How long did this transaction take? */
+ gettimeofday(&tx_finish, NULL);
+
+ syslog(9, "HTTP: 200 [%ld.%06ld] %s %s \n",
+ ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
+ ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000,
+ ReqStrs[Hdr->HR.eReqType],
+ ChrPtr(Hdr->this_page)
+ );
+
+ session_detach_modules(TheSession);
+
+ /* If *this* very transaction did not explicitly specify a session cookie,
+ * and it did not log in, we want to flag the session as a candidate for
+ * re-use by the next unbound client that comes along. This keeps our session
+ * table from getting bombarded with new sessions when, for example, a web
+ * spider crawls the site without using cookies.
*/
-
-
+ if ((session_may_be_reused) && (!WC->logged_in)) {
+ WC->wc_session = 0; /* flag as available for re-use */
+ TheSession->selected_language = 0; /* clear any non-default language setting */
+ }
+
+ TheSession->Hdr = NULL;
+ TheSession->inuse = 0; /* mark the session as unbound */
+ CtdlLogResult(pthread_mutex_unlock(&TheSession->SessionMutex));
}
void tmplput_nonce(StrBuf *Target, WCTemplputParams *TP)
StrBufAppendTemplate(Target, TP, WC->wc_fullname, 0);
}
-void tmplput_current_room(StrBuf *Target, WCTemplputParams *TP)
+void Header_HandleContentLength(StrBuf *Line, ParsedHttpHdrs *hdr)
{
- StrBufAppendTemplate(Target, TP, WC->wc_roomname, 0);
+ hdr->HR.ContentLength = StrToi(Line);
+}
+
+void Header_HandleContentType(StrBuf *Line, ParsedHttpHdrs *hdr)
+{
+ hdr->HR.ContentType = Line;
}
+void Header_HandleHost(StrBuf *Line, ParsedHttpHdrs *hdr)
+{
+ if (hdr->HostHeader != NULL) {
+ FreeStrBuf(&hdr->HostHeader);
+ }
+ hdr->HostHeader = NewStrBuf();
+ StrBufAppendPrintf(hdr->HostHeader, "%s://", (is_https ? "https" : "http") );
+ StrBufAppendBuf(hdr->HostHeader, Line, 0);
+}
+
+void Header_HandleXFFHost(StrBuf *Line, ParsedHttpHdrs *hdr)
+{
+ if (!follow_xff) return;
+
+ if (hdr->HostHeader != NULL) {
+ FreeStrBuf(&hdr->HostHeader);
+ }
+
+ hdr->HostHeader = NewStrBuf();
+ StrBufAppendPrintf(hdr->HostHeader, "http://"); /* this is naive; do something about it */
+ StrBufAppendBuf(hdr->HostHeader, Line, 0);
+}
+
+
+void Header_HandleXFF(StrBuf *Line, ParsedHttpHdrs *hdr)
+{
+ hdr->HR.browser_host = Line;
+
+ while (StrBufNum_tokens(hdr->HR.browser_host, ',') > 1) {
+ StrBufRemove_token(hdr->HR.browser_host, 0, ',');
+ }
+ StrBufTrim(hdr->HR.browser_host);
+}
+
+void Header_HandleIfModSince(StrBuf *Line, ParsedHttpHdrs *hdr)
+{
+ hdr->HR.if_modified_since = httpdate_to_timestamp(Line);
+}
+
+void Header_HandleAcceptEncoding(StrBuf *Line, ParsedHttpHdrs *hdr)
+{
+ /*
+ * Can we compress?
+ */
+ if (strstr(&ChrPtr(Line)[16], "gzip")) {
+ hdr->HR.gzip_ok = 1;
+ }
+}
+const char *ReqStrs[eNONE] = {
+ "GET",
+ "POST",
+ "OPTIONS",
+ "PROPFIND",
+ "PUT",
+ "DELETE",
+ "HEAD",
+ "MOVE",
+ "COPY"
+};
+
+void
+ServerStartModule_CONTEXT
+(void)
+{
+ long *v;
+ HttpReqTypes = NewHash(1, NULL);
+ HttpHeaderHandler = NewHash(1, NULL);
+
+ v = malloc(sizeof(long));
+ *v = eGET;
+ Put(HttpReqTypes, HKEY("GET"), v, NULL);
+
+ v = malloc(sizeof(long));
+ *v = ePOST;
+ Put(HttpReqTypes, HKEY("POST"), v, NULL);
+
+ v = malloc(sizeof(long));
+ *v = eOPTIONS;
+ Put(HttpReqTypes, HKEY("OPTIONS"), v, NULL);
+
+ v = malloc(sizeof(long));
+ *v = ePROPFIND;
+ Put(HttpReqTypes, HKEY("PROPFIND"), v, NULL);
+
+ v = malloc(sizeof(long));
+ *v = ePUT;
+ Put(HttpReqTypes, HKEY("PUT"), v, NULL);
+
+ v = malloc(sizeof(long));
+ *v = eDELETE;
+ Put(HttpReqTypes, HKEY("DELETE"), v, NULL);
+
+ v = malloc(sizeof(long));
+ *v = eHEAD;
+ Put(HttpReqTypes, HKEY("HEAD"), v, NULL);
+
+ v = malloc(sizeof(long));
+ *v = eMOVE;
+ Put(HttpReqTypes, HKEY("MOVE"), v, NULL);
+
+ v = malloc(sizeof(long));
+ *v = eCOPY;
+ Put(HttpReqTypes, HKEY("COPY"), v, NULL);
+}
+
+void
+ServerShutdownModule_CONTEXT
+(void)
+{
+ DeleteHash(&HttpReqTypes);
+ DeleteHash(&HttpHeaderHandler);
+}
+
+void RegisterHeaderHandler(const char *Name, long Len, Header_Evaluator F)
+{
+ OneHttpHeader *pHdr;
+ pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
+ memset(pHdr, 0, sizeof(OneHttpHeader));
+ pHdr->H = F;
+ Put(HttpHeaderHandler, Name, Len, pHdr, DestroyHttpHeaderHandler);
+}
+
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);
+ RegisterHeaderHandler(HKEY("CONTENT-LENGTH"), Header_HandleContentLength);
+ RegisterHeaderHandler(HKEY("CONTENT-TYPE"), Header_HandleContentType);
+ RegisterHeaderHandler(HKEY("X-FORWARDED-HOST"), Header_HandleXFFHost); /* Apache way... */
+ RegisterHeaderHandler(HKEY("X-REAL-IP"), Header_HandleXFFHost); /* NGinX way... */
+ RegisterHeaderHandler(HKEY("HOST"), Header_HandleHost);
+ RegisterHeaderHandler(HKEY("X-FORWARDED-FOR"), Header_HandleXFF);
+ RegisterHeaderHandler(HKEY("ACCEPT-ENCODING"), Header_HandleAcceptEncoding);
+ RegisterHeaderHandler(HKEY("IF-MODIFIED-SINCE"), Header_HandleIfModSince);
+
+ RegisterNamespace("CURRENT_USER", 0, 1, tmplput_current_user, NULL, CTX_NONE);
+ RegisterNamespace("NONCE", 0, 0, tmplput_nonce, NULL, 0);
+
+ WebcitAddUrlHandler(HKEY("404"), "", 0, do_404, ANONYMOUS|COOKIEUNNEEDED);
+/*
+ * 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.
+ */
+ WebcitAddUrlHandler(HKEY("scripts"), "", 0, do_404, ANONYMOUS|BOGUS); /* /root.exe - Worms and trojans and viruses, oh my! */
+ WebcitAddUrlHandler(HKEY("c"), "", 0, do_404, ANONYMOUS|BOGUS); /* /winnt */
+ WebcitAddUrlHandler(HKEY("MSADC"), "", 0, do_404, ANONYMOUS|BOGUS);
+ WebcitAddUrlHandler(HKEY("_vti"), "", 0, do_404, ANONYMOUS|BOGUS); /* Broken Microsoft DAV implementation */
+ WebcitAddUrlHandler(HKEY("MSOffice"), "", 0, do_404, ANONYMOUS|BOGUS); /* Stoopid MSOffice thinks everyone is IIS */
+ WebcitAddUrlHandler(HKEY("nonexistenshit"), "", 0, do_404, ANONYMOUS|BOGUS); /* Exploit found in the wild January 2009 */
+}
+
+
+void
+HttpNewModule_CONTEXT
+(ParsedHttpHdrs *httpreq)
+{
+ httpreq->PlainArgs = NewStrBufPlain(NULL, SIZ);
+ httpreq->this_page = NewStrBufPlain(NULL, SIZ);
+}
+
+void
+HttpDetachModule_CONTEXT
+(ParsedHttpHdrs *httpreq)
+{
+ FlushStrBuf(httpreq->PlainArgs);
+ FlushStrBuf(httpreq->HostHeader);
+ FlushStrBuf(httpreq->this_page);
+ FlushStrBuf(httpreq->PlainArgs);
+ DeleteHash(&httpreq->HTTPHeaders);
+ memset(&httpreq->HR, 0, sizeof(HdrRefs));
+}
+
+void
+HttpDestroyModule_CONTEXT
+(ParsedHttpHdrs *httpreq)
+{
+ FreeStrBuf(&httpreq->this_page);
+ FreeStrBuf(&httpreq->PlainArgs);
+ FreeStrBuf(&httpreq->this_page);
+ FreeStrBuf(&httpreq->PlainArgs);
+ FreeStrBuf(&httpreq->HostHeader);
+ DeleteHash(&httpreq->HTTPHeaders);
+
}
projects / citadel.git / blobdiff