Fixed bug #830: pkg-config support. YAZ installs yaz.pc for Debian

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

diff --git a/src/comstack.c b/src/comstack.c
index 1d877ed..db3b002 100644 (file)
--- a/src/comstack.c
+++ b/src/comstack.c
@@ -1,14 +1,20 @@
 /*
 /*

- * Copyright (c) 1995-2004, Index Data
+ * Copyright (C) 1995-2007, Index Data ApS

  * See the file LICENSE for details.
  *
  * See the file LICENSE for details.
  *

- * $Id: comstack.c,v 1.12 2004-09-30 10:00:17 adam Exp $
+ * $Id: comstack.c,v 1.18 2007-01-11 10:30:41 adam Exp $
+ */
+
+/** 
+ * \file comstack.c
+ * \brief Implements Generic COMSTACK functions

  */
 
 #include <string.h>
 #include <ctype.h>
 #include <errno.h>
 
  */
 
 #include <string.h>
 #include <ctype.h>
 #include <errno.h>
 

+#include <yaz/log.h>

 #include <yaz/comstack.h>
 #include <yaz/tcpip.h>
 #include <yaz/unix.h>
 #include <yaz/comstack.h>
 #include <yaz/tcpip.h>
 #include <yaz/unix.h>

@@ -26,7 +32,8 @@ static const char *cs_errlist[] =
     "No data (operation would block)",
     "New data while half of old buffer is on the line (flow control)",
     "Permission denied",
     "No data (operation would block)",
     "New data while half of old buffer is on the line (flow control)",
     "Permission denied",

-    "SSL error"
+    "SSL error",
+    "Too large incoming buffer"

 };
 
 const char *cs_errmsg(int n)
 };
 
 const char *cs_errmsg(int n)

@@ -34,12 +41,12 @@ const char *cs_errmsg(int n)
     static char buf[250];
 
     if (n < CSNONE || n > CSLASTERROR) {
     static char buf[250];
 
     if (n < CSNONE || n > CSLASTERROR) {

-       sprintf(buf, "unknown comstack error %d", n);
-       return buf;
+        sprintf(buf, "unknown comstack error %d", n);
+        return buf;

     }
     if (n == CSYSERR) {
     }
     if (n == CSYSERR) {

-       sprintf(buf, "%s: %s", cs_errlist[n], strerror(errno));
-       return buf;
+        sprintf(buf, "%s: %s", cs_errlist[n], strerror(errno));
+        return buf;

     }
     return cs_errlist[n];
 }
     }
     return cs_errlist[n];
 }

@@ -76,30 +83,30 @@ COMSTACK cs_create_host(const char *type_and_host, int blocking, void **vp)
 
     if (strncmp (type_and_host, "tcp:", 4) == 0)
     {
 
     if (strncmp (type_and_host, "tcp:", 4) == 0)
     {

-       t = tcpip_type;
+        t = tcpip_type;

         host = type_and_host + 4;
     }
     else if (strncmp (type_and_host, "ssl:", 4) == 0)
     {
 #if HAVE_OPENSSL_SSL_H
         host = type_and_host + 4;
     }
     else if (strncmp (type_and_host, "ssl:", 4) == 0)
     {
 #if HAVE_OPENSSL_SSL_H

-       t = ssl_type;
+        t = ssl_type;

         host = type_and_host + 4;
 #else
         host = type_and_host + 4;
 #else

-       return 0;
+        return 0;

 #endif
     }
     else if (strncmp (type_and_host, "unix:", 5) == 0)
     {
 #ifndef WIN32
 #endif
     }
     else if (strncmp (type_and_host, "unix:", 5) == 0)
     {
 #ifndef WIN32

-       t = unix_type;
+        t = unix_type;

         host = type_and_host + 5;
 #else
         host = type_and_host + 5;
 #else

-       return 0;
+        return 0;

 #endif
     }
     else if (strncmp(type_and_host, "http:", 5) == 0)
     {
 #endif
     }
     else if (strncmp(type_and_host, "http:", 5) == 0)
     {

-       t = tcpip_type;
+        t = tcpip_type;

         host = type_and_host + 5;
         while (host[0] == '/')
             host++;
         host = type_and_host + 5;
         while (host[0] == '/')
             host++;

@@ -108,28 +115,28 @@ COMSTACK cs_create_host(const char *type_and_host, int blocking, void **vp)
     else if (strncmp(type_and_host, "https:", 6) == 0)
     {
 #if HAVE_OPENSSL_SSL_H
     else if (strncmp(type_and_host, "https:", 6) == 0)
     {
 #if HAVE_OPENSSL_SSL_H

-       t = ssl_type;
+        t = ssl_type;

         host = type_and_host + 6;
         while (host[0] == '/')
             host++;
         proto = PROTO_HTTP;
 #else
         host = type_and_host + 6;
         while (host[0] == '/')
             host++;
         proto = PROTO_HTTP;
 #else

-       return 0;
+        return 0;

 #endif
     }
     else
     {
 #endif
     }
     else
     {

-       t = tcpip_type;
-       host = type_and_host;
+        t = tcpip_type;
+        host = type_and_host;

     }
     cs = cs_create (t, blocking, proto);
     if (!cs)
     }
     cs = cs_create (t, blocking, proto);
     if (!cs)

-       return 0;
+        return 0;

 
     if (!(*vp = cs_straddr(cs, host)))
     {
 
     if (!(*vp = cs_straddr(cs, host)))
     {

-       cs_close (cs);
-       return 0;
+        cs_close (cs);
+        return 0;

     }    
     return cs;
 }
     }    
     return cs;
 }

@@ -139,148 +146,194 @@ int cs_look (COMSTACK cs)
     return cs->event;
 }
 
     return cs->event;
 }
 

-#define CHUNK_DEBUG 0
-int cs_complete_auto(const unsigned char *buf, int len)
+static int skip_crlf(const char *buf, int len, int *i)

 {
 {

-    if (len > 5 && buf[0] >= 0x20 && buf[0] < 0x7f
-               && buf[1] >= 0x20 && buf[1] < 0x7f
-               && buf[2] >= 0x20 && buf[2] < 0x7f)
+    if (*i < len)

     {
     {

-        /* deal with HTTP request/response */
-       int i = 2, content_len = 0, chunked = 0;
-       
-       /* if dealing with HTTP responses - then default
-          content length is unlimited (socket close) */
-       if (!memcmp(buf, "HTTP/", 5))
-           content_len = -1; 
+        if (buf[*i] == '\r' && *i < len-1 && buf[*i + 1] == '\n')
+        {
+            (*i) += 2;
+            return 1;
+        }
+        else if (buf[*i] == '\n')
+        {
+            (*i)++;
+            return 1;
+        }
+    }
+    return 0;
+}

 
 

-        while (i <= len-4)
+#define CHUNK_DEBUG 0
+
+int cs_complete_http(const char *buf, int len)
+{
+    /* deal with HTTP request/response */
+    int i = 2, content_len = 0, chunked = 0;
+
+    if (len < 6)
+        return 0;
+
+    /* if dealing with HTTP responses - then default
+       content length is unlimited (socket close) */
+    if (!memcmp(buf, "HTTP/", 5))
+        content_len = -1; 
+
+#if 0
+    printf("len = %d\n", len);
+    fwrite (buf, 1, len, stdout);
+    printf("----------\n");
+#endif
+    while (i <= len-2)
+    {
+        if (i > 8192)
+        {
+            return i;  /* do not allow more than 8K HTTP header */
+        }
+        if (skip_crlf(buf, len, &i))

         {
         {

-           if (i > 8192)
-           {
-               return i;  /* do not allow more than 8K HTTP header */
-           }
-            if (buf[i] == '\r' && buf[i+1] == '\n')
+            if (skip_crlf(buf, len, &i))

             {
             {

-                i += 2;
-                if (buf[i] == '\r' && buf[i+1] == '\n')
-                {
-                    if (chunked)
-                    { 
-                       /* inside chunked body .. */
-                        while(1)
-                        {
-                            int j, chunk_len = 0;
-                            i += 2;
+                /* inside content */
+                if (chunked)
+                { 
+                    /* inside chunked body .. */
+                    while(1)
+                    {
+                        int chunk_len = 0;

 #if CHUNK_DEBUG
 #if CHUNK_DEBUG

-/* debugging */
-                            if (i <len-2)
-                            {
-                                printf ("\n<<<");
-                               int j;
-                                for (j = i; j <= i+4; j++)
-                                    printf ("%c", buf[j]);
-                                printf (">>>\n");
-                            }
+                        if (i < len-2)
+                        {
+                            printf ("\n<<<");
+                            int j;
+                            for (j = i; j <= i+3; j++)
+                                printf ("%c", buf[j]);
+                            printf (">>>\n");
+                        }

 #endif
 #endif

-                           /* read chunk length */
-                            while (1)
-                                if (i >= len-2) {
+                        /* read chunk length */
+                        while (1)
+                            if (i >= len-2) {

 #if CHUNK_DEBUG
 #if CHUNK_DEBUG

-/* debugging */                                    
-                                    printf ("XXXXXXXX not there yet 1\n");
-                                    printf ("i=%d len=%d\n", i, len);
+                                printf ("returning incomplete read at 1\n");
+                                printf ("i=%d len=%d\n", i, len);

 #endif
 #endif

-                                    return 0;
-                                } else if (isdigit(buf[i]))
-                                    chunk_len = chunk_len * 16 + 
-                                        (buf[i++] - '0');
-                                else if (isupper(buf[i]))
-                                    chunk_len = chunk_len * 16 + 
-                                        (buf[i++] - ('A'-10));
-                                else if (islower(buf[i]))
-                                    chunk_len = chunk_len * 16 + 
-                                        (buf[i++] - ('a'-10));
-                                else
-                                    break;
-                           /* move forward until CRLF - skip chunk ext */
-                           j = 0;
-                           while (buf[i] != '\r' && buf[i+1] != '\n')
-                           {
-                               if (i >= len-2)
-                                   return 0;   /* need more buffer .. */
-                               if (++j > 1000)
-                                   return i; /* enough.. stop */
-                               i++;
-                           }
-                           /* got CRLF */
-#if CHUNK_DEBUG
-                           printf ("XXXXXX chunk_len=%d\n", chunk_len);
-#endif                     
-                           if (chunk_len < 0)
-                               return i+2;    /* bad chunk_len */
-                            if (chunk_len == 0)
-                               break;
-                            i += chunk_len+2;
+                                return 0;
+                            } else if (isdigit(buf[i]))
+                                chunk_len = chunk_len * 16 + 
+                                    (buf[i++] - '0');
+                            else if (isupper(buf[i]))
+                                chunk_len = chunk_len * 16 + 
+                                    (buf[i++] - ('A'-10));
+                            else if (islower(buf[i]))
+                                chunk_len = chunk_len * 16 + 
+                                    (buf[i++] - ('a'-10));
+                            else
+                                break;
+                        if (chunk_len == 0)
+                            break;
+                        if (chunk_len < 0)
+                            return i;
+                        
+                        while (1)
+                        {
+                            if (i >= len -1)
+                                return 0;
+                            if (skip_crlf(buf, len, &i))
+                                break;
+                            i++;

                         }
                         }

-                       /* consider trailing headers .. */
-                       while(i <= len-4)
-                       {
-                           if (buf[i] == '\r' &&  buf[i+1] == '\n' &&
-                               buf[i+2] == '\r' && buf[i+3] == '\n')
-                               if (len >= i+4)
-                                   return i+4;
-                           i++;
-                       }
+                        /* got CRLF */

 #if CHUNK_DEBUG
 #if CHUNK_DEBUG

-/* debugging */
-                       printf ("XXXXXXXXX not there yet 2\n");
-                       printf ("i=%d len=%d\n", i, len);
-#endif
-                       return 0;
+                        printf ("chunk_len=%d\n", chunk_len);
+#endif                      
+                        i += chunk_len;
+                        if (i >= len-2)
+                            return 0;
+                        if (!skip_crlf(buf, len, &i))
+                            return 0;

                     }
                     }

-                    else
-                    {   /* not chunked ; inside body */
-                        /* i += 2 seems not to work with GCC -O2 .. 
-                           so i+2 is used instead .. */
-                       if (content_len == -1)
-                           return 0;   /* no content length */
-                        else if (len >= (i+2)+ content_len)
-                       {
-                            return (i+2)+ content_len;
-                       }
+                    /* consider trailing headers .. */
+                    while (i < len)
+                    {
+                        if (skip_crlf(buf, len, &i))
+                        {
+                            if (skip_crlf(buf, len, &i))
+                                return i;
+                        }
+                        else
+                            i++;

                     }
                     }

-                    break;
-                }
-                else if (i < len - 20 && 
-                         !strncasecmp((const char *) buf+i, "Transfer-Encoding:", 18))
-                {
-                    i+=18;
-                    while (buf[i] == ' ')
-                        i++;
-                    if (i < len - 8)
-                        if (!strncasecmp((const char *) buf+i, "chunked", 7))
-                            chunked = 1;
-                }
-                else if (i < len - 17 &&
-                         !strncasecmp((const char *)buf+i, "Content-Length:", 15))
-                {
-                    i+= 15;
-                    while (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;
+#if CHUNK_DEBUG
+                    printf ("returning incomplete read at 2\n");
+                    printf ("i=%d len=%d\n", i, len);
+#endif
+                    return 0;

                 }
                 else
                 }
                 else

+                {   /* not chunked ; inside body */
+                    if (content_len == -1)
+                        return 0;   /* no content length */
+                    else if (len >= i + content_len)
+                    {
+                        return i + content_len;
+                    }
+                }
+                break;
+            }
+            else if (i < len - 20 && 
+                     !strncasecmp((const char *) buf+i, "Transfer-Encoding:", 18))
+            {
+                i+=18;
+                while (buf[i] == ' ')

                     i++;
                     i++;

+                if (i < len - 8)
+                    if (!strncasecmp((const char *) buf+i, "chunked", 7))
+                        chunked = 1;
+            }
+            else if (i < len - 17 &&
+                     !strncasecmp((const char *)buf+i, "Content-Length:", 15))
+            {
+                i+= 15;
+                while (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++;
         }
             }
             else
                 i++;
         }

-        return 0;
+        else
+            i++;
+    }
+    return 0;
+}
+
+int cs_complete_auto(const unsigned char *buf, int len)
+{
+    if (len > 5 && buf[0] >= 0x20 && buf[0] < 0x7f
+                && buf[1] >= 0x20 && buf[1] < 0x7f
+                && buf[2] >= 0x20 && buf[2] < 0x7f)
+    {
+        int r = cs_complete_http((const char *) buf, len);
+        return r;

     }
     return completeBER(buf, len);
 }
     }
     return completeBER(buf, len);
 }

+
+void cs_set_max_recv_bytes(COMSTACK cs, int max_recv_bytes)
+{
+    cs->max_recv_bytes = max_recv_bytes;
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+