X-Git-Url: http://www.privoxy.org/gitweb/?a=blobdiff_plain;f=jbsockets.c;h=3d4b29640b99291ace35fcdd4504fa1fd8fc96b8;hb=40f23d485c1e8bc8aa892b93d644dad4b8243685;hp=23e427fdb425ee844469ef1e50b16adb243910cf;hpb=a729163e4309e9b0cbbc2b4870b0eb9bc5035f3d;p=privoxy.git

diff --git a/jbsockets.c b/jbsockets.c
index 23e427fd..3d4b2964 100644
--- a/jbsockets.c
+++ b/jbsockets.c
@@ -1,4 +1,4 @@
-const char jbsockets_rcs[] = "$Id: jbsockets.c,v 1.61 2009/05/28 21:13:34 fabiankeil Exp $";
+const char jbsockets_rcs[] = "$Id: jbsockets.c,v 1.67 2009/09/10 14:53:34 fabiankeil Exp $";
 /*********************************************************************
  *
  * File        :  $Source: /cvsroot/ijbswa/current/jbsockets.c,v $
@@ -169,7 +169,10 @@ jb_socket connect_to(const char *host, int portnum, struct client_state *csp)
    memset((char *)&hints, 0, sizeof(hints));
    hints.ai_family = AF_UNSPEC;
    hints.ai_socktype = SOCK_STREAM;
-   hints.ai_flags = AI_ADDRCONFIG | AI_NUMERICSERV; /* avoid service look-up */
+   hints.ai_flags = AI_NUMERICSERV; /* avoid service look-up */
+#ifdef AI_ADDRCONFIG
+   hints.ai_flags |= AI_ADDRCONFIG;
+#endif
    if ((retval = getaddrinfo(host, service, &hints, &result)))
    {
       log_error(LOG_LEVEL_INFO,
@@ -196,6 +199,12 @@ jb_socket connect_to(const char *host, int portnum, struct client_state *csp)
 #endif /* def FEATURE_ACL */
 
       csp->http->host_ip_addr_str = malloc(NI_MAXHOST);
+      if (NULL == csp->http->host_ip_addr_str)
+      {
+         log_error(LOG_LEVEL_ERROR,
+            "Out of memory while getting the server IP address.");
+         return JB_INVALID_SOCKET;
+      }
       retval = getnameinfo(rp->ai_addr, rp->ai_addrlen,
          csp->http->host_ip_addr_str, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
       if (!csp->http->host_ip_addr_str || retval)
@@ -559,7 +568,7 @@ int read_socket(jb_socket fd, char *buf, int len)
 #elif defined(__BEOS__) || defined(AMIGA) || defined(__OS2__)
    return(recv(fd, buf, (size_t)len, 0));
 #else
-   return(read(fd, buf, (size_t)len));
+   return((int)read(fd, buf, (size_t)len));
 #endif
 }
 
@@ -580,6 +589,7 @@ int read_socket(jb_socket fd, char *buf, int len)
  *********************************************************************/
 int data_is_available(jb_socket fd, int seconds_to_wait)
 {
+   char buf[10];
    fd_set rfds;
    struct timeval timeout;
    int n;
@@ -600,7 +610,7 @@ int data_is_available(jb_socket fd, int seconds_to_wait)
    /*
     * XXX: Do we care about the different error conditions?
     */
-   return (n == 1);
+   return ((n == 1) && (1 == recv(fd, buf, 1, MSG_PEEK)));
 }
 
 
@@ -696,7 +706,10 @@ int bind_port(const char *hostnam, int portnum, jb_socket *pfd)
       hints.ai_family = AF_UNSPEC;
    }
    hints.ai_socktype = SOCK_STREAM;
-   hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
+   hints.ai_flags = AI_PASSIVE;
+#ifdef AI_ADDRCONFIG
+   hints.ai_flags |= AI_ADDRCONFIG;
+#endif
    hints.ai_protocol = 0; /* Realy any stream protocol or TCP only */
    hints.ai_canonname = NULL;
    hints.ai_addr = NULL;
@@ -898,6 +911,12 @@ void get_host_information(jb_socket afd, char **ip_address, char **hostname)
       }
 #ifdef HAVE_RFC2553
       *ip_address = malloc(NI_MAXHOST);
+      if (NULL == *ip_address)
+      {
+         log_error(LOG_LEVEL_ERROR,
+            "Out of memory while getting the client's IP address.");
+         return;
+      }
       retval = getnameinfo((struct sockaddr *) &server, s_length,
          *ip_address, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
       if (retval)
@@ -921,6 +940,12 @@ void get_host_information(jb_socket afd, char **ip_address, char **hostname)
 
 #ifdef HAVE_RFC2553
       *hostname = malloc(NI_MAXHOST);
+      if (NULL == *hostname)
+      {
+         log_error(LOG_LEVEL_ERROR,
+            "Out of memory while getting the client's hostname.");
+         return;
+      }
       retval = getnameinfo((struct sockaddr *) &server, s_length,
          *hostname, NI_MAXHOST, NULL, 0, NI_NAMEREQD);
       if (retval)
@@ -1029,6 +1054,12 @@ int accept_connection(struct client_state * csp, jb_socket fd)
    csp->cfd = afd;
 #ifdef HAVE_RFC2553
    csp->ip_addr_str = malloc(NI_MAXHOST);
+   if (NULL == csp->ip_addr_str)
+   {
+      log_error(LOG_LEVEL_ERROR,
+         "Out of memory while getting the client's IP address.");
+      return 0;
+   }
    retval = getnameinfo((struct sockaddr *) &client, c_length,
          csp->ip_addr_str, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
    if (!csp->ip_addr_str || retval)
@@ -1183,6 +1214,9 @@ unsigned long resolve_hostname_to_ip(const char *host)
  *********************************************************************/
 int socket_is_still_usable(jb_socket sfd)
 {
+   char buf[10];
+   int no_data_waiting;
+
 #ifdef HAVE_POLL
    int poll_result;
    struct pollfd poll_fd[1];
@@ -1193,20 +1227,16 @@ int socket_is_still_usable(jb_socket sfd)
 
    poll_result = poll(poll_fd, 1, 0);
 
-   if (-1 != poll_result)
-   {
-      return !(poll_fd[0].revents & POLLIN);
-   }
-   else
+   if (-1 == poll_result)
    {
       log_error(LOG_LEVEL_CONNECT, "Polling socket %d failed.", sfd);
       return FALSE;
    }
+   no_data_waiting = !(poll_fd[0].revents & POLLIN);
 #else
    fd_set readable_fds;
    struct timeval timeout;
    int ret;
-   int socket_is_alive = 0;
 
    memset(&timeout, '\0', sizeof(timeout));
    FD_ZERO(&readable_fds);
@@ -1215,17 +1245,13 @@ int socket_is_still_usable(jb_socket sfd)
    ret = select((int)sfd+1, &readable_fds, NULL, NULL, &timeout);
    if (ret < 0)
    {
-      log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
+      log_error(LOG_LEVEL_CONNECT, "select() on socket %d failed: %E", sfd);
+      return FALSE;
    }
-
-   /*
-    * XXX: I'm not sure why !FD_ISSET() works,
-    * but apparently it does.
-    */
-   socket_is_alive = !FD_ISSET(sfd, &readable_fds);
-
-   return socket_is_alive;
+   no_data_waiting = !FD_ISSET(sfd, &readable_fds);
 #endif /* def HAVE_POLL */
+
+   return (no_data_waiting || (1 == recv(sfd, buf, 1, MSG_PEEK)));
 }
 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */