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Modified to store and use IP addresses and the IP port number in the network byte order.

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This commit is contained in:
bacpack
2010-10-29 17:29:01 +00:00
parent 79b86d3a8c
commit 73415f4a5d
1 changed files with 47 additions and 51 deletions
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bacnet-stack/src/bip.c
+47 -51
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@@ -45,11 +45,11 @@
/** @file bip.c Configuration and Operations for BACnet/IP */
static int BIP_Socket = -1;
/* port to use - stored in host byte order */
static uint16_t BIP_Port = 0xBAC0;
/* IP Address - stored in host byte order */
/* port to use - stored in network byte order */
static uint16_t BIP_Port = 0; /* this will force initialization in demos */
/* IP Address - stored in network byte order */
static struct in_addr BIP_Address;
/* Broadcast Address - stored in host byte order */
/* Broadcast Address - stored in network byte order */
static struct in_addr BIP_Broadcast_Address;
/** Setter for the BACnet/IP socket handle.
@@ -91,60 +91,56 @@ void bip_cleanup(
return;
}
/* set using network byte order */
void bip_set_addr(
uint32_t net_address)
uint32_t net_address) /* in network byte order */
{
BIP_Address.s_addr = ntohl(net_address);
BIP_Address.s_addr = net_address;
}
/* returns host byte order */
uint32_t bip_get_addr(
void)
{
return BIP_Address.s_addr;
return ntohl(BIP_Address.s_addr);
}
/* set using network byte order */
void bip_set_broadcast_addr(
uint32_t net_address)
uint32_t net_address) /* in network byte order */
{
BIP_Broadcast_Address.s_addr = ntohl(net_address);
BIP_Broadcast_Address.s_addr = net_address;
}
/* returns host byte order */
uint32_t bip_get_broadcast_addr(
void)
{
return BIP_Broadcast_Address.s_addr;
return ntohl(BIP_Broadcast_Address.s_addr);
}
/* set using host byte order */
void bip_set_port(
uint16_t port)
uint16_t port) /* in host byte order */
{
BIP_Port = port;
BIP_Port = htons(port);
}
/* returns host byte order */
uint16_t bip_get_port(
void)
{
return BIP_Port;
return ntohs(BIP_Port);
}
static int bip_decode_bip_address(
uint8_t * pdu, /* buffer to extract encoded address */
struct in_addr *address, /* in host format */
uint16_t * port)
BACNET_ADDRESS * bac_addr,
struct in_addr *address, /* in network format */
uint16_t * port) /* in network format */
{
int len = 0;
uint32_t raw_address = 0;
if (pdu) {
(void) decode_unsigned32(&pdu[0], &raw_address);
address->s_addr = raw_address;
(void) decode_unsigned16(&pdu[4], port);
if (bac_addr) {
memcpy (&address->s_addr, &bac_addr->mac[0], 4);
memcpy (port, &bac_addr->mac[4], 2);
len = 6;
}
@@ -188,14 +184,14 @@ int bip_send_pdu(
port = BIP_Port;
mtu[1] = BVLC_ORIGINAL_BROADCAST_NPDU;
} else if (dest->mac_len == 6) {
bip_decode_bip_address(&dest->mac[0], &address, &port);
bip_decode_bip_address(dest, &address, &port);
mtu[1] = BVLC_ORIGINAL_UNICAST_NPDU;
} else {
/* invalid address */
return -1;
}
bip_dest.sin_addr.s_addr = htonl(address.s_addr);
bip_dest.sin_port = htons(port);
bip_dest.sin_addr.s_addr = address.s_addr;
bip_dest.sin_port = port;
memset(&(bip_dest.sin_zero), '\0', 8);
mtu_len = 2;
mtu_len +=
@@ -270,17 +266,17 @@ uint16_t bip_receive(
if ((pdu[1] == BVLC_ORIGINAL_UNICAST_NPDU) ||
(pdu[1] == BVLC_ORIGINAL_BROADCAST_NPDU)) {
/* ignore messages from me */
if ((sin.sin_addr.s_addr == htonl(BIP_Address.s_addr)) &&
(sin.sin_port == htons(BIP_Port))) {
if ((sin.sin_addr.s_addr == BIP_Address.s_addr) &&
(sin.sin_port == BIP_Port)) {
pdu_len = 0;
#if PRINT_ENABLED
fprintf(stderr, "BIP: src is me. Discarded!\n");
#endif
} else {
/* copy the source address - into host format */
/* data in src->mac[] is in network format */
src->mac_len = 6;
(void) encode_unsigned32(&src->mac[0], htonl(sin.sin_addr.s_addr));
(void) encode_unsigned16(&src->mac[4], htons(sin.sin_port));
memcpy (&src->mac[0], &sin.sin_addr.s_addr, 4);
memcpy (&src->mac[4], &sin.sin_port, 2);
/* FIXME: check destination address */
/* see if it is broadcast or for us */
/* decode the length of the PDU - length is inclusive of BVLC */
@@ -312,18 +308,17 @@ uint16_t bip_receive(
}
}
} else if (pdu[1] == BVLC_FORWARDED_NPDU) {
// next 2 lines - moved data is always in the network format
*(uint32_t *)&sin.sin_addr.s_addr = *(uint32_t *)&pdu[4];
*(uint16_t *)&sin.sin_port = *(uint16_t *)&pdu[8];
if ((sin.sin_addr.s_addr == htonl(BIP_Address.s_addr)) &&
(sin.sin_port == htons(BIP_Port))) {
memcpy (&sin.sin_addr.s_addr, &pdu[4], 4);
memcpy (&sin.sin_port, &pdu[8], 2);
if ((sin.sin_addr.s_addr == BIP_Address.s_addr) &&
(sin.sin_port == BIP_Port)) {
/* ignore messages from me */
pdu_len = 0;
} else {
/* copy the real source address - into host format */
/* data in src->mac[] is in network format */
src->mac_len = 6;
(void) encode_unsigned32(&src->mac[0], htonl(sin.sin_addr.s_addr));
(void) encode_unsigned16(&src->mac[4], htons(sin.sin_port));
memcpy (&src->mac[0], &sin.sin_addr.s_addr, 4);
memcpy (&src->mac[4], &sin.sin_port, 2);
/* FIXME: check destination address */
/* see if it is broadcast or for us */
/* decode the length of the PDU - length is inclusive of BVLC */
@@ -355,14 +350,16 @@ void bip_get_my_address(
{
int i = 0;
my_address->mac_len = 6;
(void) encode_unsigned32(&my_address->mac[0], htonl(BIP_Address.s_addr));
(void) encode_unsigned16(&my_address->mac[4], htons(BIP_Port));
my_address->net = 0; /* local only, no routing */
my_address->len = 0; /* no SLEN */
for (i = 0; i < MAX_MAC_LEN; i++) {
/* no SADR */
my_address->adr[i] = 0;
if (my_address) {
my_address->mac_len = 6;
memcpy (&my_address->mac[0], &BIP_Address.s_addr, 4);
memcpy (&my_address->mac[4], &BIP_Port, 2);
my_address->net = 0; /* local only, no routing */
my_address->len = 0; /* no SLEN */
for (i = 0; i < MAX_MAC_LEN; i++) {
/* no SADR */
my_address->adr[i] = 0;
}
}
return;
@@ -375,9 +372,8 @@ void bip_get_broadcast_address(
if (dest) {
dest->mac_len = 6;
(void) encode_unsigned32(&dest->mac[0],
htonl(BIP_Broadcast_Address.s_addr));
(void) encode_unsigned16(&dest->mac[4], htons(BIP_Port));
memcpy (&dest->mac[0], &BIP_Broadcast_Address.s_addr, 4);
memcpy (&dest->mac[4], &BIP_Port, 2);
dest->net = BACNET_BROADCAST_NETWORK;
dest->len = 0; /* no SLEN */
for (i = 0; i < MAX_MAC_LEN; i++) {