-/*
- * Copyright (c) 1995-2003, Index Data
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) Index Data
* See the file LICENSE for details.
- *
- * $Id: comstack.c,v 1.2 2003-11-17 10:40:56 mike Exp $
*/
+/**
+ * \file comstack.c
+ * \brief Implements Generic COMSTACK functions
+ */
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <string.h>
-#include <ctype.h>
#include <errno.h>
+#include <yaz/yaz-iconv.h>
+#include <yaz/log.h>
#include <yaz/comstack.h>
#include <yaz/tcpip.h>
#include <yaz/unix.h>
#include <yaz/odr.h>
+#include <yaz/matchstr.h>
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",
- "SSL error"
+ "SSL error",
+ "Too large incoming buffer"
};
const char *cs_errmsg(int n)
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) {
- 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];
}
void cs_get_host_args(const char *type_and_host, const char **args)
{
-
+
*args = "";
- if (*type_and_host && strncmp(type_and_host, "unix:", 5))
+ if (!strncmp(type_and_host, "unix:", 5))
+ {
+ const char *cp = strchr(type_and_host + 5, ':');
+ if (cp)
+ type_and_host = cp + 1;
+ else
+ type_and_host += strlen(type_and_host); /* empty string */
+ }
+ if (*type_and_host)
{
const char *cp;
cp = strstr(type_and_host, "://");
}
}
-COMSTACK cs_create_host(const char *type_and_host, int blocking, void **vp)
+int cs_parse_host(const char *uri, const char **host,
+ CS_TYPE *t, enum oid_proto *proto,
+ char **connect_host)
{
- enum oid_proto proto = PROTO_Z3950;
- const char *host = 0;
- COMSTACK cs;
- CS_TYPE t;
+ *connect_host = 0;
- if (strncmp (type_and_host, "tcp:", 4) == 0)
+ *t = tcpip_type;
+ if (strncmp(uri, "connect:", 8) == 0)
{
- t = tcpip_type;
- host = type_and_host + 4;
+ const char *cp = strchr(uri, ',');
+ if (cp)
+ {
+ size_t len;
+
+ uri += 8;
+ len = cp - uri;
+ *connect_host = (char *) xmalloc(len + 1);
+ memcpy(*connect_host, uri, len);
+ (*connect_host)[len] = '\0';
+ uri = cp + 1;
+ }
}
- else if (strncmp (type_and_host, "ssl:", 4) == 0)
+ else if (strncmp(uri, "unix:", 5) == 0)
{
-#if HAVE_OPENSSL_SSL_H
- t = ssl_type;
- host = type_and_host + 4;
+ const char *cp;
+
+ uri += 5;
+ cp = strchr(uri, ':');
+ if (cp)
+ {
+ size_t len = cp - uri;
+ *connect_host = (char *) xmalloc(len + 1);
+ memcpy(*connect_host, uri, len);
+ (*connect_host)[len] = '\0';
+ uri = cp + 1;
+ }
+#ifdef WIN32
+ xfree(*connect_host);
+ *connect_host = 0;
+ return 0;
#else
- return 0;
+ *t = unix_type;
#endif
}
- else if (strncmp (type_and_host, "unix:", 5) == 0)
+
+ if (strncmp (uri, "tcp:", 4) == 0)
+ {
+ *host = uri + 4;
+ *proto = PROTO_Z3950;
+ }
+ else if (strncmp (uri, "ssl:", 4) == 0)
{
-#ifndef WIN32
- t = unix_type;
- host = type_and_host + 5;
+#if HAVE_GNUTLS_H
+ *t = ssl_type;
+ *host = uri + 4;
+ *proto = PROTO_Z3950;
#else
- return 0;
+ xfree(*connect_host);
+ *connect_host = 0;
+ return 0;
#endif
}
- else if (strncmp(type_and_host, "http:", 5) == 0)
+ else if (strncmp(uri, "http:", 5) == 0)
{
- t = tcpip_type;
- host = type_and_host + 5;
- if (host[0] == '/' && host[1] == '/')
- host = host + 2;
- proto = PROTO_HTTP;
+ *host = uri + 5;
+ while (**host == '/')
+ (*host)++;
+ *proto = PROTO_HTTP;
}
- else if (strncmp(type_and_host, "https:", 6) == 0)
+ else if (strncmp(uri, "https:", 6) == 0)
{
-#if HAVE_OPENSSL_SSL_H
- t = ssl_type;
- host = type_and_host + 6;
- if (host[0] == '/' && host[1] == '/')
- host = host + 2;
- proto = PROTO_HTTP;
+#if HAVE_GNUTLS_H
+ *t = ssl_type;
+ *host = uri + 6;
+ while (**host == '/')
+ (*host)++;
+ *proto = PROTO_HTTP;
#else
- return 0;
+ xfree(*connect_host);
+ *connect_host = 0;
+ return 0;
#endif
}
else
{
- t = tcpip_type;
- host = type_and_host;
-
+ *host = uri;
+ *proto = PROTO_Z3950;
+ }
+ return 1;
+}
+
+COMSTACK cs_create_host(const char *vhost, int blocking, void **vp)
+{
+ return cs_create_host_proxy(vhost, blocking, vp, 0);
+}
+
+COMSTACK cs_create_host_proxy(const char *vhost, int blocking, void **vp,
+ const char *proxy_host)
+{
+ enum oid_proto proto = PROTO_Z3950;
+ const char *host = 0;
+ COMSTACK cs;
+ CS_TYPE t;
+ char *connect_host = 0;
+
+ if (!cs_parse_host(vhost, &host, &t, &proto, &connect_host))
+ return 0;
+
+ if (proxy_host)
+ {
+ enum oid_proto proto1;
+
+ xfree(connect_host);
+ if (!cs_parse_host(proxy_host, &host, &t, &proto1, &connect_host))
+ return 0;
}
- cs = cs_create (t, blocking, proto);
- if (!cs)
- return 0;
- if (!(*vp = cs_straddr(cs, host)))
+ if (t == tcpip_type)
+ {
+ const char *bind_host = strchr(vhost, ' ');
+ if (bind_host && bind_host[1])
+ bind_host++;
+ else
+ bind_host = 0;
+ cs = yaz_tcpip_create2(-1, blocking, proto, connect_host ? host : 0,
+ bind_host);
+ }
+ else
+ {
+ cs = cs_create(t, blocking, proto);
+ }
+ if (cs)
{
- cs_close (cs);
- return 0;
- }
+ if (!(*vp = cs_straddr(cs, connect_host ? connect_host : host)))
+ {
+ cs_close (cs);
+ cs = 0;
+ }
+ }
+ xfree(connect_host);
return cs;
}
return cs->event;
}
-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 (buf[*i] == '\r' && *i < len-1 && buf[*i + 1] == '\n')
+ {
+ (*i) += 2;
+ return 1;
+ }
+ else if (buf[*i] == '\n')
+ {
+ (*i)++;
+ return 1;
+ }
+ }
+ return 0;
+}
+
+#define CHUNK_DEBUG 0
- while (i <= len-4)
+static int cs_read_chunk(const char *buf, int i, int len)
+{
+ /* inside chunked body .. */
+ while (1)
+ {
+ int chunk_len = 0;
+#if CHUNK_DEBUG
+ if (i < len-2)
{
- if (i > 8192)
- return i; /* do not allow more than 8K HTTP header */
- if (buf[i] == '\r' && buf[i+1] == '\n')
- {
- i += 2;
- if (buf[i] == '\r' && buf[i+1] == '\n')
- {
- if (chunked)
- {
- while(1)
- {
- int chunk_len = 0;
- i += 2;
-#if 0
-/* debugging */
- if (i <len-2)
- {
- printf ("\n>>>");
- for (j = i; j <= i+4; j++)
- printf ("%c", buf[j]);
- printf ("<<<\n");
- }
+ int j;
+ printf ("\n<<<");
+ for (j = i; j <= i+3; j++)
+ printf ("%c", buf[j]);
+ printf (">>>\n");
+ }
#endif
- while (1)
- if (i >= len-2) {
-#if 0
-/* debugging */
- printf ("XXXXXXXX not there yet 1\n");
- printf ("i=%d len=%d\n", i, len);
+ /* read chunk length */
+ while (1)
+ if (i >= len-2) {
+#if CHUNK_DEBUG
+ printf ("returning incomplete read at 1\n");
+ printf ("i=%d len=%d\n", i, len);
+#endif
+ return 0;
+ } else if (yaz_isdigit(buf[i]))
+ chunk_len = chunk_len * 16 +
+ (buf[i++] - '0');
+ else if (yaz_isupper(buf[i]))
+ chunk_len = chunk_len * 16 +
+ (buf[i++] - ('A'-10));
+ else if (yaz_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++;
+ }
+ /* got CRLF */
+#if CHUNK_DEBUG
+ 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;
+ }
+ /* consider trailing headers .. */
+ while (i < len)
+ {
+ if (skip_crlf(buf, len, &i))
+ {
+ if (skip_crlf(buf, len, &i))
+ return i;
+ }
+ else
+ i++;
+ }
+#if CHUNK_DEBUG
+ printf ("returning incomplete read at 2\n");
+ printf ("i=%d len=%d\n", i, len);
#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;
- if (buf[i] != '\r' || buf[i+1] != '\n' ||
- chunk_len < 0)
- return i+2; /* bad. stop now */
- if (chunk_len == 0)
- {
- /* 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++;
- }
+ return 0;
+}
+
+static int cs_complete_http(const char *buf, int len, int head_only)
+{
+ /* deal with HTTP request/response */
+ int i, content_len = 0, chunked = 0;
+
+ /* need at least one line followed by \n or \r .. */
+ for (i = 0; ; i++)
+ if (i == len)
+ return 0; /* incomplete */
+ else if (buf[i] == '\n' || buf[i] == '\r')
+ break;
+
+ /* check to see if it's a response with content */
+ if (!head_only && !memcmp(buf, "HTTP/", 5))
+ {
+ int j;
+ for (j = 5; j < i; j++)
+ if (buf[j] == ' ')
+ {
+ ++j;
+ if (buf[j] == '1') /* 1XX */
+ ;
+ else if (!memcmp(buf + j, "204", 3))
+ ;
+ else if (!memcmp(buf + j, "304", 3))
+ ;
+ else
+ content_len = -1;
+ break;
+ }
+ }
#if 0
-/* debugging */
- printf ("XXXXXXXXX not there yet 2\n");
- printf ("i=%d len=%d\n", i, len);
+ printf("len = %d\n", len);
+ fwrite (buf, 1, len, stdout);
+ printf("----------\n");
#endif
- return 0;
- }
- i += chunk_len+2;
- }
- }
- else
- { /* not chunked ; inside body */
- /* 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;
+ for (i = 2; i <= len-2; )
+ {
+ if (i > 8192)
+ {
+ return i; /* do not allow more than 8K HTTP header */
+ }
+ if (skip_crlf(buf, len, &i))
+ {
+ if (skip_crlf(buf, len, &i))
+ {
+ /* inside content */
+ if (chunked)
+ return cs_read_chunk(buf, i, len);
+ 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 - 21 &&
- !memcmp(buf+i, "Transfer-Encoding: ", 18))
- {
- i+=18;
- if (buf[i] == ' ')
- i++;
- if (i < len - 8)
- if (!memcmp(buf+i, "chunked", 7))
- chunked = 1;
}
- else if (i < len - 18 &&
- !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
+ break;
+ }
+ else if (i < len - 20 &&
+ !yaz_strncasecmp((const char *) buf+i,
+ "Transfer-Encoding:", 18))
+ {
+ i+=18;
+ while (buf[i] == ' ')
+ i++;
+ if (i < len - 8)
+ if (!yaz_strncasecmp((const char *) buf+i, "chunked", 7))
+ chunked = 1;
+ }
+ else if (i < len - 17 &&
+ !yaz_strncasecmp((const char *)buf+i,
+ "Content-Length:", 15))
+ {
+ i+= 15;
+ while (buf[i] == ' ')
i++;
+ content_len = 0;
+ while (i <= len-4 && yaz_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;
+ else
+ i++;
+ }
+ return 0;
+}
+
+static int cs_complete_auto_x(const char *buf, int len, int head_only)
+{
+ 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(buf, len, head_only);
+ return r;
}
return completeBER(buf, len);
}
+
+
+int cs_complete_auto(const char *buf, int len)
+{
+ return cs_complete_auto_x(buf, len, 0);
+}
+
+int cs_complete_auto_head(const char *buf, int len)
+{
+ return cs_complete_auto_x(buf, len, 1);
+}
+
+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
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+
projects / yaz-moved-to-github.git / blobdiff