corrected BACnet/IP for the linux port.

bacnet-stack/Makefile

@@ -6,8 +6,8 @@ BASEDIR = .
 #CFLAGS  = -Wall -I. -O2 -g
 # Note: you can strip out symbols using the strip command
 # to get an idea of how big the compile really is.
-CFLAGS  = -Wall -I. -g -DBACDL_ETHERNET=1
-#CFLAGS  = -Wall -I. -Iports/linux -g -DBACDL_BIP=1
+#CFLAGS  = -Wall -I. -g -DBACDL_ETHERNET=1
+CFLAGS  = -Wall -I. -Iports/linux -g -DBACDL_BIP=1
 
 SRCS = ports/linux/main.c \
        ports/linux/ethernet.c \

bacnet-stack/bip.h

@@ -67,6 +67,9 @@ uint16_t bip_receive(
 
 void bip_set_address(uint8_t octet1, uint8_t octet2, 
   uint8_t octet3, uint8_t octet4);
+void bip_set_broadcast_address(uint8_t octet1, uint8_t octet2, 
+  uint8_t octet3, uint8_t octet4);
+  
 void bip_set_port(uint16_t port);
 void bip_set_interface_name(char *ifname);
 

bacnet-stack/ports/linux/bip.c

@@ -73,7 +73,7 @@ static void set_network_address(struct in_addr *net_address,
     long_data.byte[2] = octet3;
     long_data.byte[3] = octet4;
     
-    net_address->s_addr = htonl(long_data.value);
+    net_address->s_addr = long_data.value;
 }
 
 void bip_set_address(
@@ -85,6 +85,15 @@ void bip_set_address(
     set_network_address(&BIP_Address, octet1, octet2, octet3, octet4);
 }
 
+void bip_set_broadcast_address(
+    uint8_t octet1, 
+    uint8_t octet2, 
+    uint8_t octet3, 
+    uint8_t octet4)
+{
+    set_network_address(&BIP_Broadcast_Address, octet1, octet2, octet3, octet4);
+}
+
 void bip_set_port(uint16_t port)
 {
     BIP_Port = htons(port);
@@ -95,13 +104,11 @@ bool bip_init(void)
     int rv = 0; // return from socket lib calls
     struct sockaddr_in sin;
 
-    /* network global broadcast address */
-    set_network_address(&BIP_Broadcast_Address,255,255,255,255);
-    /* configure standard BACnet/IP port */
+    /* configure standard BACnet/IP receive port */
     bip_set_port(0xBAC0);
 
     // assumes that the driver has already been initialized
-    BIP_Receive_Socket = socket(AF_INET, SOCK_DGRAM, 0);
+    BIP_Receive_Socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
     if (BIP_Receive_Socket < 0)
         return false;
 
@@ -134,18 +141,16 @@ static int bip_send(
     int mtu_len = 0;
     int bytes_sent = 0;
     int status = 0;
+    int sockopt = 0;
     
     // assumes that the driver has already been initialized
-    // FIXME: can we use the same socket over and over?
-    // FIXME: can we use the same socket as receive bip?
     bip_send_socket = socket(AF_INET, SOCK_DGRAM, 0);
     if (bip_send_socket < 0)
         return bip_send_socket;
-
-    /* UDP is connection based */
-    status = connect(bip_send_socket, 
-        (const struct sockaddr*)bip_dest, 
-        sizeof(struct sockaddr));
+    // allow us to do a broadcast if necessary
+    sockopt = 1;
+    status = setsockopt(bip_send_socket, SOL_SOCKET, SO_BROADCAST, 
+        &sockopt, sizeof(sockopt));
     if (status < 0)
     {
         close(bip_send_socket);

bacnet-stack/ports/linux/main.c

@@ -99,6 +99,7 @@ static void decode_network_address(struct in_addr *net_address,
 static void Init_Network(char *ifname)
 {
     struct in_addr local_address;
+    struct in_addr broadcast_address;
     uint8_t octet1; 
     uint8_t octet2; 
     uint8_t octet3; 
@@ -110,6 +111,12 @@ static void Init_Network(char *ifname)
     bip_set_address(octet1, octet2, octet3, octet4);
     fprintf(stderr,"IP Address: %d.%d.%d.%d\n",
       (int)octet1, (int)octet2, (int)octet3, (int)octet4);   
+    /* setup local broadcast address */
+    get_local_address_ioctl(ifname, &broadcast_address, SIOCGIFBRDADDR);
+    decode_network_address(&broadcast_address, &octet1, &octet2, &octet3, &octet4);
+    bip_set_broadcast_address(octet1, octet2, octet3, octet4);
+    fprintf(stderr,"Broadcast Address: %d.%d.%d.%d\n",
+      (int)octet1, (int)octet2, (int)octet3, (int)octet4);   
 }
 #endif