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/* |
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The Malete project - the Z39.2/Z39.50 database framework of OpenIsis. |
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Version 0.9.x (patchlevel see file Version) |
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Copyright (C) 2001-2004 by Erik Grziwotz, erik@openisis.org |
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|
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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|
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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See the GNU Lesser General Public License for more details. |
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|
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You should have received a copy of the GNU Lesser General Public |
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License along with this library; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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|
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see README for more information |
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EOH */ |
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|
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/* |
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$Id: srv.c,v 1.7 2004/08/16 12:10:07 kripke Exp $ |
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malete server |
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*/ |
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#ifndef WIN32 |
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#include <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/select.h> |
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#include <sys/socket.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <netinet/in.h> |
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#include <sys/un.h> |
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#include <string.h> /* memcpy et al */ |
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#include <signal.h> |
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#include <errno.h> |
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#include <sys/wait.h> |
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#else |
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#define WIN32_LEAN_AND_MEAN |
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#define NONAMELESSUNION |
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/* #include <winsock2.h> -lws2_32 */ |
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#include <winsock.h> /* -lwsock32 "good" enough ? */ |
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#define close closesocket |
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#endif |
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|
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#include "../tool/tool.h" |
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|
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|
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static void stdsrv ( file f ) |
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{ |
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List in; |
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FIL_DEFBUF(f); |
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lInit(&in, 0); |
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while ( fGetr(lClr(&in), &fb) ) { |
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dispatch(in.fld); |
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SEOR(env.out); |
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} |
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} /* srv */ |
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|
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|
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static char buf[0x2000]; |
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static int fill; |
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static int crlf; |
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static int wrotehead; |
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static int broken; |
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static unsigned sock; /* response socket */ |
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enum { |
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SOL, /* at start of line */ |
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TAG, /* in tag (only digits seen in line) */ |
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VAL /* in val (some non-digit seen) */ |
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}; |
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|
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static int flushsock () |
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{ |
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int got = send(sock, buf, fill, 0); |
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if ( 0 < got ) { |
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if ( !(fill -= got) ) |
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return 0; |
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memmove(buf, buf+got, fill); |
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return 0; |
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} |
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fill = 0; |
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return broken = eRr(ERR_NO, "could not send"); |
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} |
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|
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|
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static void sinksock (Sink *lo, int eor) |
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{ |
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Fld *f = lo->lst.fld, *e = f + RLEN(f); |
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|
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if ( (unsigned)-1 == sock ) |
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goto reset; |
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if ( wrotehead ) |
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f++; |
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for ( ; f < e; f++ ) { |
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int maxfill = sizeof(buf)-13-f->len, l, n; |
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char *p, *v; |
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if ( 0 > maxfill ) |
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maxfill = 0; |
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/* make sure we have enough room */ |
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while ( fill > maxfill ) |
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if ( flushsock() ) |
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goto reset; |
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p = buf+fill; |
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if ( wrotehead ) { |
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p += i2a(p, f->tag); |
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*p++ = TAB; |
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} else { |
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if ( 10>b36val[(unsigned)*f->val] ) { |
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*p++ = 'W'; |
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*p++ = TAB; |
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} |
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wrotehead = 1; |
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} |
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v = f->val; |
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l = f->len; |
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/* write field value */ |
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while ( l >= (n = buf+sizeof(buf) - p) ) { |
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memcpy(p, v, n); |
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fill = sizeof(buf); |
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if ( flushsock() ) |
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goto reset; |
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p = buf+fill; |
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} |
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memcpy(p, v, l); |
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p += l; |
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*p++ = LF; |
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fill = p - buf; |
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} /* for */ |
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if ( eor ) { /* add a \n and flush */ |
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if ( sizeof(buf) == fill && flushsock() ) /* pathological */ |
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goto reset; |
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buf[fill++] = LF; |
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while ( fill && !flushsock() ) |
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; |
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} |
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reset: |
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lReset(&lo->lst); |
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} /* sinksock */ |
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|
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|
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/* |
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serve one request on sock |
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*/ |
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static int srv1 () |
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{ |
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#define CR 13 |
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int state = SOL, neg = 0; |
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char *p, *e, *n; |
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unsigned l; |
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List in; |
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Fld *f = 0; |
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|
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crlf = 0; |
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lInit(&in, 0); |
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|
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wantmore: /* really a for, but we need multi-level continue anyway */ |
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if ( 0 >= (fill = recv(sock, p = buf, sizeof(buf), 0)) ) |
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return eRr(LOG_WARN, "got %d in recv", fill); |
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LOG_DBG(LOG_DEBUG, "got %d bytes", fill); |
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e = p + fill; |
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havemore: |
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switch (state) { |
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case SOL: |
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switch (*p) { |
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case CR: |
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if (e == p+1) goto wantmore; /* ignore */ |
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if (LF != p[1]) break; /* weird crap */ |
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p++; |
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case LF: /* got blank line */ |
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if ( e > ++p ) |
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return eRr(ERR_INVAL, "got %d excess bytes", e-p); |
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goto gotit; /* break 2 */ |
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} |
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LNEWF(&in, 0, 80); |
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if ( !f && (CT_IS(D,*p) || '-' == *p) ) { |
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eRr(LOG_WARN, "no message name"); |
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LNEWF(&in, 0, 80); |
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} |
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f = LLAST(&in); |
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state = TAG; |
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if ( (neg = '-' == *p) && e == ++p ) goto wantmore; |
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case TAG: |
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while ( CT_IS(D,*p) ) { |
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f->tag = f->tag*10 + b36val[(unsigned char)*p]; |
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if ( e == ++p ) goto wantmore; /* continue 2 */ |
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} |
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if ( neg ) |
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f->tag = -f->tag; |
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LOG_DBG(LOG_DEBUG, "got tag %d", f->tag); |
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state = VAL; |
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if ( TAB == *p && e == ++p ) goto wantmore; |
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case VAL: |
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n = memchr(p, LF, e-p); |
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if ( !n ) |
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l = e-p; |
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else if ( (l = n-p) && 13 == n[-1] ) { |
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if ( crlf ) |
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l--; |
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else if ( f == in.fld ) { |
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l--; |
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crlf = 1; |
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LOG_DBG(LOG_DEBUG, "detected crlf"); |
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} |
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} |
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LAPP(&in, p, l); |
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if ( n ) { |
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state = SOL; |
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if ( e > (p = n+1) ) |
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goto havemore; |
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} |
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goto wantmore; |
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} |
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gotit: |
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fill = 0; |
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wrotehead = 0; |
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broken = 0; |
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env.out->off = 0; |
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lClr(&env.out->lst); |
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dispatch(in.fld); |
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SEOR(env.out); |
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return broken; |
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} /* srv1 */ |
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|
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|
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/* ************************************************************ |
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*/ |
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|
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int server () |
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{ |
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Ses s; |
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Fld opt = { 0, 0, 0 }; |
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fd_set lst; /* listening socks */ |
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fd_set all; |
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unsigned fdlen = 0; |
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#ifndef WIN32 |
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unsigned kids = 0; |
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#endif |
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|
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sInit(ses = &s); |
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FD_ZERO(&lst); |
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FD_ZERO(&all); |
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if ( env.opt ) for ( opt.val = 0; vGet(&opt, env.opt->fld, "S"); ) |
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switch (opt.tag) { |
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static const int yes = !0; |
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struct sockaddr_in si; |
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#ifndef WIN32 |
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struct sockaddr_un su; |
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#endif |
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struct sockaddr *sa; |
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int sal; |
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Fld info; |
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case 'S': /* socket */ |
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info = opt; /* for message */ |
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#ifndef WIN32 |
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if ( opt.len && '/'==*opt.val ) { /* unix socket */ |
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if ( opt.len > sizeof(su.sun_path)-1 ) { |
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eRr(ERR_INVAL, "unix socket name '%.*s' too long", opt.len, opt.val); |
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return 1; |
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} |
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memset(&su, 0, sizeof(su)); |
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memcpy(su.sun_path, opt.val, opt.len); |
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su.sun_path[opt.len] = 0; |
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su.sun_family = AF_UNIX; |
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unlink(su.sun_path); |
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sa = (struct sockaddr*)&su; |
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sal = sizeof(su); |
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sock = socket(PF_UNIX, SOCK_STREAM, 0); |
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} else |
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#else |
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{ |
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WSADATA wsadata; |
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memset(&wsadata, 0, sizeof(wsadata)); |
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if ( WSAStartup(2, &wsadata) ) { |
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/* funny enough, winsock 1 says ok :) */ |
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eRr(ERR_INVAL, "could not get winsock"); |
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return 1; |
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} |
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} |
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#endif |
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{ /* TCP socket */ |
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memset(&si, 0, sizeof(si)); |
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si.sin_family = AF_INET; |
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si.sin_addr.s_addr = INADDR_ANY; |
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si.sin_port = htons(2042); |
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if ( opt.len ) { /* standard */ |
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Fld port = opt; |
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char *end = memchr(opt.val, ':', opt.len); |
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if ( end /* host:port */ |
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|| CT_D!=lat1ct[(unsigned char)*opt.val] /* hostname */ |
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|| memchr(opt.val, '.', opt.len) |
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) { |
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if ( !end ) end = opt.val+opt.len; |
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if ( 9 >= (end - opt.val) |
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&& !memcmp("localhost",opt.val,end - opt.val) |
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) |
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si.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
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else { /* parse dotted decimal */ |
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} |
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if ( (port.len = opt.len - (end - opt.val)) ) { |
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port.len--; |
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port.val = end+1; |
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} |
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} |
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if ( port.len ) |
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si.sin_port = htons(V2I(&port)); |
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} else { |
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info.val = "*:2042"; |
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info.len = 6; |
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} |
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sa = (struct sockaddr *)&si; |
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sal = sizeof(si); |
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sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP/*6*/); |
| 316 |
} |
| 317 |
if ( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) ) { |
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eRr(ERR_NO, "setsockopt"); |
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return 1; |
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} |
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if ( bind(sock, sa, sal) ) { |
| 322 |
eRr(ERR_NO, "could not bind to '%.*s'", info.len, info.val); |
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return 1; |
| 324 |
} |
| 325 |
if ( listen(sock, 64) ) { |
| 326 |
eRr(ERR_NO, "listen failed"); |
| 327 |
return 1; |
| 328 |
} |
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eRr(LOG_INFO, "listening on '%.*s'", info.len, info.val); |
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FD_SET(sock, &lst); |
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FD_SET(sock, &all); |
| 332 |
if ( fdlen < sock+1 ) |
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fdlen = sock+1; |
| 334 |
} |
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/* done with options */ |
| 336 |
if ( !fdlen ) { |
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stdsrv(env.in); |
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return 0; |
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} |
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env.out->snk = sinksock; |
| 341 |
for (;;) { |
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fd_set sele = all; |
| 343 |
int got = select(fdlen, &sele, 0, 0, 0); |
| 344 |
if ( 0 >= got ) { |
| 345 |
eRr(ERR_NO, "select said %d", got); |
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continue; |
| 347 |
} |
| 348 |
for ( sock=0; got--; ) { |
| 349 |
while (!FD_ISSET(sock, &sele)) |
| 350 |
sock++; |
| 351 |
if ( FD_ISSET(sock, &lst) ) { |
| 352 |
struct sockaddr peer; |
| 353 |
unsigned /*socklen_t is broken*/ plen = sizeof(peer); |
| 354 |
unsigned nsock = accept(sock, &peer, &plen); |
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#ifndef WIN32 |
| 356 |
if ( ENV_EXCL != env.wri ) { /* shared or read only */ |
| 357 |
if ( fork() ) { |
| 358 |
close(nsock); |
| 359 |
kids++; |
| 360 |
continue; |
| 361 |
} |
| 362 |
sock = nsock; |
| 363 |
while ( !srv1() ) |
| 364 |
; |
| 365 |
exit(0); |
| 366 |
} |
| 367 |
#endif |
| 368 |
FD_SET(nsock, &all); |
| 369 |
if ( fdlen < nsock+1 ) |
| 370 |
fdlen = nsock+1; |
| 371 |
continue; |
| 372 |
} |
| 373 |
/* else serve a request on this socket */ |
| 374 |
/* TODO: use the socket's session */ |
| 375 |
if ( srv1() ) { |
| 376 |
close(sock); |
| 377 |
FD_CLR(sock, &all); |
| 378 |
} |
| 379 |
} |
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#ifndef WIN32 |
| 381 |
for ( ;kids && 0 < waitpid(-1, 0, WNOHANG); kids--) |
| 382 |
; |
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#endif |
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} |
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return 0; |
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} /* server */ |
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