Added interface for tcpd wrapper for access control.

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

diff --git a/comstack/tcpip.c b/comstack/tcpip.c
index f3efddb..62a6a5e 100644 (file)
--- a/comstack/tcpip.c
+++ b/comstack/tcpip.c
@@ -4,7 +4,14 @@
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: tcpip.c,v $
- * Revision 1.27  1999-02-02 13:57:31  adam
+ * Revision 1.29  1999-04-16 14:45:55  adam
+ * Added interface for tcpd wrapper for access control.
+ *
+ * Revision 1.28  1999/03/31 11:11:14  adam
+ * Function getprotobyname only called once. Minor change in tcpip_get
+ * to handle multi-threaded conditions.
+ *
+ * Revision 1.27  1999/02/02 13:57:31  adam
  * Uses preprocessor define WIN32 instead of WINDOWS to build code
  * for Microsoft WIN32.
  *
@@ -165,6 +172,7 @@
 
 #include <comstack.h>
 #include <tcpip.h>
+#include <log.h>
 
 /* Chas added the following, so we get the definition of completeBER */
 #include <odr.h>
@@ -221,8 +229,16 @@ static int tcpip_init (void)
     return 1;
 }
 #else
+
+static int proto_number = 0;
+
 static int tcpip_init (void)
 {
+    struct protoent *proto;
+    /* only call getprotobyname once, in case it allocates memory */
+    if (!(proto = getprotobyname("tcp")))
+       return 0;
+    proto_number = proto->p_proto;
     return 1;
 }
 #endif
@@ -237,22 +253,19 @@ COMSTACK tcpip_type(int s, int blocking, int protocol)
     int new_socket;
 #ifdef WIN32
     unsigned long tru = 1;
-#else
-    struct protoent *proto;
 #endif
 
     if (!tcpip_init ())
         return 0;
     if (s < 0)
     {
-#ifndef WIN32
-       if (!(proto = getprotobyname("tcp")))
+#ifdef WIN32
+       if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
            return 0;
-       if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
 #else
-       if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
-#endif
+       if ((s = socket(AF_INET, SOCK_STREAM, proto_number)) < 0)
            return 0;
+#endif
        new_socket = 1;
     }
     else
@@ -305,7 +318,7 @@ COMSTACK tcpip_type(int s, int blocking, int protocol)
     return p;
 }
 
-static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
+int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
 {
     struct hostent *hp;
     char *p, buf[512];
@@ -403,6 +416,7 @@ int tcpip_bind(COMSTACK h, void *address, int mode)
     unsigned long one = 1;
 #endif
 
+    logf (LOG_LOG, "tcpip_bind");
     TRC(fprintf(stderr, "tcpip_bind\n"));
     if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*) 
        &one, sizeof(one)) < 0)
@@ -424,19 +438,6 @@ int tcpip_bind(COMSTACK h, void *address, int mode)
     return 0;
 }
 
-#if 0
-void tcpip_get_ip(COMSTACK h, char *ip_buf)
-{
-    struct tcpip_state *sp = (tcpip_state *)h->cprivate;
-    const char *ip_addr = (const char *) (&sp->addr->sin_addr.s_addr);
-    int i;
-
-    for (i = 0; i<4; i++)
-       TRC (fprintf (stderr, "%u ", ip_addr[i]));
-    TRC (fprintf (stderr, "\n"));
-}
-#endif
-
 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
                 int (*check_ip)(void *cd, const char *a, int len, int type),
                 void *cd)
@@ -467,14 +468,14 @@ int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
         memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
     else if (addrlen)
         *addrlen = 0;
-    if (check_ip && (*check_ip)(cd, (const char *) &addr.sin_addr,
-        sizeof(addr.sin_addr), AF_INET))
+    if (check_ip && (*check_ip)(cd, (const char *) &addr,
+        sizeof(addr), AF_INET))
     {
        h->cerrno = CSDENY;
 #ifdef WIN32
-        closesocket(h->iofile);
+        closesocket(h->newfd);
 #else
-        close(h->iofile);
+        close(h->newfd);
 #endif
        return -1;
     }
@@ -503,7 +504,8 @@ COMSTACK tcpip_accept(COMSTACK h)
     }
     memcpy(cnew, h, sizeof(*h));
     cnew->iofile = h->newfd;
-    if (!(state = (tcpip_state *)(cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
+    if (!(state = (tcpip_state *)
+         (cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
     {
         h->cerrno = CSYSERR;
         return 0;
@@ -564,16 +566,21 @@ int tcpip_get(COMSTACK h, char **buf, int *bufsize)
        {
 #ifdef WIN32
             if (WSAGetLastError() == WSAEWOULDBLOCK)
+               break;
+           else
+               return -1;
 #else
+           if (errno == EWOULDBLOCK
 #ifdef EINPROGRESS
-           if (errno == EINPROGRESS || errno == EWOULDBLOCK)
-#else
-            if (errno == EWOULDBLOCK)
-#endif
+               || errno == EINPROGRESS
 #endif
-                break;
-            else
+               )
+               break;
+            else if (errno == 0)
+               continue;
+           else
                 return -1;
+#endif
        }
         if (!res)
             return 0;