Dates

[yaz-moved-to-github.git] / comstack / comstack.c

diff --git a/comstack/comstack.c b/comstack/comstack.c
index 5526fce..a9d73bd 100644 (file)
--- a/comstack/comstack.c
+++ b/comstack/comstack.c
@@ -1,34 +1,159 @@
 /*
- * Copyright (c) 1995, Index Data
+ * Copyright (c) 1995-2003, Index Data
  * See the file LICENSE for details.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: comstack.c,v $
- * Revision 1.2  1995-09-29 17:01:48  quinn
- * More Windows work
- *
- * Revision 1.1  1995/06/14  09:58:20  quinn
- * Renamed yazlib to comstack.
- *
- * Revision 1.2  1995/05/16  08:51:15  quinn
- * License, documentation, and memory fixes
- *
- * Revision 1.1  1995/03/14  10:28:34  quinn
- * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
- *
  *
+ * $Id: comstack.c,v 1.12 2003-02-21 12:08:57 adam Exp $
  */
 
-const char *cs_errlist[] =
+#include <string.h>
+#include <ctype.h>
+
+#include <yaz/comstack.h>
+#include <yaz/tcpip.h>
+#include <yaz/unix.h>
+#include <yaz/odr.h>
+
+static const char *cs_errlist[] =
 {
     "No error or unspecified error",
     "System (lower-layer) error",
     "Operation out of state",
     "No data (operation would block)",
-    "New data while half of old buffer is on the line (flow control)"
+    "New data while half of old buffer is on the line (flow control)",
+    "Permission denied",
+    "SSL error"
 };
 
 const char *cs_errmsg(int n)
 {
+    if (n < 0 || n > 6)
+       n = 0;
     return cs_errlist[n];
 }
+
+const char *cs_strerror(COMSTACK h)
+{
+    return cs_errmsg(h->cerrno);
+}
+
+COMSTACK cs_create_host(const char *type_and_host, int blocking, void **vp)
+{
+    enum oid_proto proto = PROTO_Z3950;
+    const char *host = 0;
+    COMSTACK cs;
+    CS_TYPE t;
+
+    if (strncmp (type_and_host, "tcp:", 4) == 0)
+    {
+       t = tcpip_type;
+        host = type_and_host + 4;
+    }
+    else if (strncmp (type_and_host, "ssl:", 4) == 0)
+    {
+#if HAVE_OPENSSL_SSL_H
+       t = ssl_type;
+        host = type_and_host + 4;
+#else
+       return 0;
+#endif
+    }
+    else if (strncmp (type_and_host, "unix:", 5) == 0)
+    {
+#ifndef WIN32
+       t = unix_type;
+        host = type_and_host + 5;
+#else
+       return 0;
+#endif
+    }
+    else if (strncmp(type_and_host, "http:", 5) == 0)
+    {
+       t = tcpip_type;
+        host = type_and_host + 5;
+        if (host[0] == '/' && host[1] == '/')
+            host = host + 2;
+        proto = PROTO_HTTP;
+    }
+    else if (strncmp(type_and_host, "https:", 6) == 0)
+    {
+#if HAVE_OPENSSL_SSL_H
+       t = ssl_type;
+        host = type_and_host + 6;
+        if (host[0] == '/' && host[1] == '/')
+            host = host + 2;
+#else
+       return 0;
+#endif
+        proto = PROTO_HTTP;
+    }
+    else
+    {
+       t = tcpip_type;
+       host = type_and_host;
+        
+    }
+    cs = cs_create (t, blocking, proto);
+    if (!cs)
+       return 0;
+
+    if (!(*vp = cs_straddr(cs, host)))
+    {
+       cs_close (cs);
+       return 0;
+    }    
+    return cs;
+}
+
+int cs_look (COMSTACK cs)
+{
+    return cs->event;
+}
+
+int cs_complete_auto(const unsigned char *buf, int len)
+{
+    if (!len)
+       return 0;
+    if (!buf[0] && !buf[1])
+       return 0;
+    if (len > 5 && buf[0] >= 0x20 && buf[0] < 0x7f
+               && buf[1] >= 0x20 && buf[1] < 0x7f
+               && buf[2] >= 0x20 && buf[2] < 0x7f)
+    {
+        /* deal with HTTP request/response */
+       int i = 2, content_len = 0;
+
+        while (i <= len-4)
+        {
+            if (buf[i] == '\r' && buf[i+1] == '\n')
+            {
+                i += 2;
+                if (buf[i] == '\r' && buf[i+1] == '\n')
+                {
+                    /* i += 2 seems not to work with GCC -O2 .. 
+                       so i+2 is used instead .. */
+                    if (len >= (i+2)+ content_len)
+                        return (i+2)+ content_len;
+                    break;
+                }
+                if (i < len-18)
+                {
+                    if (!memcmp(buf+i, "Content-Length:", 15))
+                    {
+                        i+= 15;
+                        if (buf[i] == ' ')
+                            i++;
+                        content_len = 0;
+                        while (i <= len-4 && isdigit(buf[i]))
+                            content_len = content_len*10 + (buf[i++] - '0');
+                        if (content_len < 0) /* prevent negative offsets */
+                            content_len = 0;
+                    }
+                }
+            }
+            else
+                i++;
+        }
+        return 0;
+    }
+    return completeBER(buf, len);
+}