/**
* Determine if two address are on the same network.
*
* @arg addr1 IP address 1
* @arg addr2 IP address 2
* @arg mask network identifier mask
* @return !0 if the network identifiers of both address match
*/
public static bool ip_addr_netcmp(ip_addr addr1, ip_addr addr2, ip_addr mask)
{
return(((addr1).addr &
(mask).addr) ==
((addr2).addr &
(mask).addr));
}
public const int IP_LOOPBACKNET = 127; /* official! */
/** Set an IP address given by the four byte-parts.
* Little-endian version that prevents the use of lwip.lwip_htonl. */
public static void IP4_ADDR(ip_addr ipaddr, byte a, byte b, byte c, byte d)
{
ipaddr.addr = ((uint)((d) & 0xff) << 24) |
((uint)((c) & 0xff) << 16) |
((uint)((b) & 0xff) << 8) |
(uint)((a) & 0xff);
}
internal err_t output(lwip ip, pbuf p, ip_addr src, ip_addr dest, byte ttl, byte tos, byte proto)
{
int pos = 0, rest = p.tot_len;
byte[] packet = new byte[rest];
ip_addr srch = new ip_addr(lwip_ntohl(src.addr));
ip_addr desth = new ip_addr(lwip_ntohl(dest.addr));
for (pbuf q = p; q != null; q = q.next)
{
int len = rest;
if (len > q.len)
{
len = q.len;
}
Buffer.BlockCopy(q.payload.data, q.payload.offset, packet, pos, len);
pos += len;
rest -= len;
}
m_output(ip, packet, srch, desth, proto);
return(err_t.ERR_OK);
}
internal void input(pointer packet, int length, ip_addr srcn, ip_addr destn, byte proto)
{
ip_addr src = new ip_addr(lwip.lwip_htonl(srcn.addr));
ip_addr dest = new ip_addr(lwip.lwip_htonl(destn.addr));
pbuf p = pbuf_alloc(pbuf_layer.PBUF_RAW, (ushort)length, pbuf_type.PBUF_POOL);
int pos = 0, rest = length;
for (pbuf q = p; q != null; q = q.next)
{
int len = rest;
if (len > q.len)
{
len = q.len;
}
pointer.memcpy(q.payload, new pointer(packet, pos), len);
pos += len;
rest -= len;
}
if (ip_input(p, src, dest, proto) != err_t.ERR_OK)
{
pbuf_free(p);
}
}
public ER Connect(T_IPV4EP p_myaddr, T_IPV4EP p_dstaddr, TMO tmout)
{
err_t err;
ip_addr ma = new ip_addr(0);
ip_addr sa = new ip_addr(0);
ma.addr = lwip.lwip_htonl(p_myaddr.ipaddr);
err = m_lwIP.tcp.tcp_bind(m_Pcb, ma, lwip.lwip_htons(p_myaddr.portno));
if (err != err_t.ERR_OK)
{
return(ER.E_OBJ);
}
sa.addr = lwip.lwip_htonl(p_dstaddr.ipaddr);
err = m_lwIP.tcp.tcp_connect(m_Pcb, sa, lwip.lwip_htons(p_dstaddr.portno), Connected);
if (err != err_t.ERR_OK)
{
return(ER.E_OBJ);
}
Task task = m_Nucleus.GetTask(ID.TSK_SELF);
if ((tmout != 0) && (task == null))
{
return(ER.E_CTX);
}
if (task == null)
{
return(ER.E_TMOUT);
}
if (tmout == 0)
{
return(ER.E_TMOUT);
}
SetState(true, new TMO(tcp.TCP_TMR_INTERVAL), task, Intarval);
ER ret = task.Wait(m_SendTaskQueue, TSKWAIT.TTW_TCP, m_CepID, tmout);
switch (ret)
{
case ER.E_OK:
if ((m_TPcb == null) || (m_TPcb.state != tcp_state.ESTABLISHED))
{
return(ER.E_RLWAI);
}
break;
case ER.E_TMOUT:
return(ER.E_TMOUT);
default:
return(ER.E_RLWAI);
}
return(ER.E_OK);
}
public static void ip_addr_debug_print(uint debug, ip_addr ipaddr)
{
uITron3.lwip.LWIP_DEBUGF(debug, "{0}.{1}.{2}.{3}",
ipaddr != null ? ip_addr.ip4_addr1_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr2_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr3_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr4_16(ipaddr) : 0);
}
internal static string to_string(ip_addr ipaddr)
{
return(String.Format("{0}.{1}.{2}.{3}",
ipaddr != null ? ip_addr.ip4_addr1_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr2_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr3_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr4_16(ipaddr) : 0));
}
/**
* Simple interface to ip_output_if. It finds the outgoing network
* interface and calls upon ip_output_if to do the actual work.
*
* @param p the packet to send (p.payload points to the data, e.g. next
* protocol header; if dest == ip.IP_HDRINCL, p already includes an IP
* header and p.payload points to that IP header)
* @param src the source IP address to send from (if src == IP_ADDR_ANY, the
* IP address of the netif used to send is used as source address)
* @param dest the destination IP address to send the packet to
* @param ttl the TTL value to be set in the IP header
* @param tos the TOS value to be set in the IP header
* @param proto the PROTOCOL to be set in the IP header
*
* @return err_t.ERR_RTE if no route is found
* see ip_output_if() for more return values
*/
public err_t ip_output(pbuf p, ip_addr src, ip_addr dest,
byte ttl, byte tos, byte proto)
{
/* pbufs passed to IP must have a @ref-count of 1 as their payload pointer
* gets altered as the packet is passed down the stack */
lwip.LWIP_ASSERT("p.ref == 1", p.@ref == 1);
return(ip_output_if(p, src, dest, ttl, tos, proto));
}
/* lwip.inet_chksum_pseudo:
*
* Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
* IP addresses are expected to be in network byte order.
*
* @param p chain of pbufs over that a checksum should be calculated (ip data part)
* @param src source ip address (used for checksum of pseudo header)
* @param dst destination ip address (used for checksum of pseudo header)
* @param proto ip protocol (used for checksum of pseudo header)
* @param proto_len length of the ip data part (used for checksum of pseudo header)
* @return checksum (as ushort) to be saved directly in the protocol header
*/
public static ushort inet_chksum_pseudo_partial(pbuf p,
ip_addr src, ip_addr dest,
byte proto, ushort proto_len, ushort chksum_len)
{
uint acc;
uint addr;
pbuf q;
byte swapped;
ushort chklen;
acc = 0;
swapped = 0;
/* iterate through all pbuf in chain */
for (q = p; (q != null) && (chksum_len > 0); q = q.next)
{
lwip.LWIP_DEBUGF(opt.INET_DEBUG, "inet_chksum_pseudo(): checksumming pbuf {0} (has next {1}) \n",
q, q.next);
chklen = q.len;
if (chklen > chksum_len)
{
chklen = chksum_len;
}
acc += LWIP_CHKSUM(q.payload, chklen);
chksum_len -= chklen;
lwip.LWIP_ASSERT("delete me", chksum_len < 0x7fff);
/*lwip.LWIP_DEBUGF(opt.INET_DEBUG, "inet_chksum_pseudo(): unwrapped lwip_chksum()={0} \n", acc);*/
/* fold the upper bit down */
acc = FOLD_U32T(acc);
if (q.len % 2 != 0)
{
swapped = (byte)(1 - swapped);
acc = SWAP_BYTES_IN_WORD((ushort)acc);
}
/*lwip.LWIP_DEBUGF(opt.INET_DEBUG, "inet_chksum_pseudo(): wrapped lwip_chksum()={0} \n", acc);*/
}
if (swapped != 0)
{
acc = SWAP_BYTES_IN_WORD((ushort)acc);
}
addr = ip_addr.ip4_addr_get_u32(src);
acc += (addr & 0xffffU);
acc += ((addr >> 16) & 0xffffU);
addr = ip_addr.ip4_addr_get_u32(dest);
acc += (addr & 0xffffU);
acc += ((addr >> 16) & 0xffffU);
acc += (uint)lwip.lwip_htons((ushort)proto);
acc += (uint)lwip.lwip_htons(proto_len);
/* Fold 32-bit sum to 16 bits
* calling this twice is propably faster than if statements... */
acc = FOLD_U32T(acc);
acc = FOLD_U32T(acc);
lwip.LWIP_DEBUGF(opt.INET_DEBUG, "inet_chksum_pseudo(): pbuf chain lwip_chksum()={0}\n", acc);
return((ushort)~(acc & 0xffffUL));
}
/**
* Ascii internet address interpretation routine.
* The value returned is in network order.
*
* @param cp IP address in ascii represenation (e.g. "127.0.0.1")
* @return ip address in network order
*/
public static uint ipaddr_addr(string cp)
{
ip_addr val = new ip_addr(0);
if (ipaddr_aton(cp, val) != 0)
{
return(ip_addr.ip4_addr_get_u32(val));
}
return(IPADDR_NONE);
}
private void ip_output(lwip netif, byte[] packet, ip_addr src, ip_addr dest, byte proto)
{
if (m_IPPacketBridge == null)
{
return;
}
byte[] data = Itron.GetIp4Packet(new pointer(packet, 0), packet.Length, src, dest, proto);
m_IPPacketBridge.OutputData(data);
}
public UdpCep(ID udpid, ref T_UDP_CCEP pk_cudp, Nucleus pNucleus, lwip lwip)
{
m_CepID = udpid;
m_cudp = pk_cudp;
m_Nucleus = pNucleus;
m_lwIP = lwip;
ip_addr addr = new ip_addr(pk_cudp.myaddr.ipaddr);
m_Pcb = m_lwIP.udp.udp_new();
m_lwIP.udp.udp_bind(m_Pcb, addr, pk_cudp.myaddr.portno);
udp.udp_recv(m_Pcb, recv, this);
}
/* lwip.inet_chksum_pseudo:
*
* Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
* IP addresses are expected to be in network byte order.
*
* @param p chain of pbufs over that a checksum should be calculated (ip data part)
* @param src source ip address (used for checksum of pseudo header)
* @param dst destination ip address (used for checksum of pseudo header)
* @param proto ip protocol (used for checksum of pseudo header)
* @param proto_len length of the ip data part (used for checksum of pseudo header)
* @return checksum (as ushort) to be saved directly in the protocol header
*/
public static ushort inet_chksum_pseudo(pbuf p, ip_addr src, ip_addr dest,
byte proto, ushort proto_len)
{
uint acc;
uint addr;
pbuf q;
byte swapped;
acc = 0;
swapped = 0;
/* iterate through all pbuf in chain */
for (q = p; q != null; q = q.next)
{
lwip.LWIP_DEBUGF(opt.INET_DEBUG, "inet_chksum_pseudo(): checksumming pbuf {0} (has next {1}) \n",
q, q.next);
acc += LWIP_CHKSUM(q.payload, q.len);
/*lwip.LWIP_DEBUGF(opt.INET_DEBUG, "inet_chksum_pseudo(): unwrapped lwip_chksum()={0} \n", acc);*/
/* just executing this next line is probably faster that the if statement needed
* to check whether we really need to execute it, and does no harm */
acc = FOLD_U32T(acc);
if (q.len % 2 != 0)
{
swapped = (byte)(1 - swapped);
acc = SWAP_BYTES_IN_WORD((ushort)acc);
}
/*lwip.LWIP_DEBUGF(opt.INET_DEBUG, "inet_chksum_pseudo(): wrapped lwip_chksum()={0} \n", acc);*/
}
if (swapped != 0)
{
acc = SWAP_BYTES_IN_WORD((ushort)acc);
}
addr = ip_addr.ip4_addr_get_u32(src);
acc += (addr & 0xffffU);
acc += ((addr >> 16) & 0xffffU);
addr = ip_addr.ip4_addr_get_u32(dest);
acc += (addr & 0xffffU);
acc += ((addr >> 16) & 0xffffU);
acc += (uint)lwip.lwip_htons((ushort)proto);
acc += (uint)lwip.lwip_htons(proto_len);
/* Fold 32-bit sum to 16 bits
* calling this twice is propably faster than if statements... */
acc = FOLD_U32T(acc);
acc = FOLD_U32T(acc);
lwip.LWIP_DEBUGF(opt.INET_DEBUG, "inet_chksum_pseudo(): pbuf chain lwip_chksum()={0}\n", acc);
return((ushort)~(acc & 0xffffU));
}
/**
* Same as ipaddr_ntoa, but reentrant since a user-supplied buffer is used.
*
* @param addr ip address in network order to convert
* @param buf target buffer where the pointer is stored
* @param buflen length of buf
* @return either pointer to buf which now holds the ASCII
* representation of addr or null if buf was too small
*/
public static string ipaddr_ntoa_r(ip_addr addr, char[] buf)
{
byte[] s_addr;
char[] inv = new char[3];
int rp;
int ap;
byte rem;
byte n;
byte i;
int len = 0;
s_addr = BitConverter.GetBytes(ip_addr.ip4_addr_get_u32(addr));
rp = 0;
ap = 0;
for (n = 0; n < 4; n++)
{
i = 0;
do
{
rem = (byte)(s_addr[ap] % 10);
s_addr[ap] /= (byte)10;
inv[i++] = (char)('0' + rem);
} while (s_addr[ap] != 0);
while ((i--) != 0)
{
if (len++ >= buf.Length)
{
return(null);
}
buf[rp++] = inv[i];
}
if (len++ >= buf.Length)
{
return(null);
}
buf[rp++] = '.';
ap++;
}
buf[--rp] = '\0';
return(buf.ToString());
}
/**
* Determine if an address is a broadcast address on a network interface
*
* @param addr address to be checked
* @param netif the network interface against which the address is checked
* @return returns non-zero if the address is a broadcast address
*/
public static bool ip4_addr_isbroadcast(uint addr, lwip netif)
{
ip_addr ipaddr = new ip_addr(0);
ip_addr.ip4_addr_set_u32(ipaddr, addr);
/* all ones (broadcast) or all zeroes (old skool broadcast) */
if ((~addr == IPADDR_ANY) ||
(addr == IPADDR_ANY))
{
return(true);
/* no broadcast support on this network interface? */
}
else if ((netif.flags & lwip.NETIF_FLAG_BROADCAST) == 0)
{
/* the given address cannot be a broadcast address
* nor can we check against any broadcast addresses */
return(false);
/* address matches network interface address exactly? => no broadcast */
}
else if (addr == ip_addr.ip4_addr_get_u32(netif.ip_addr))
{
return(false);
/* on the same (sub) network... */
}
else if (ip_addr.ip_addr_netcmp(ipaddr, netif.ip_addr, netif.netmask)
/* ...and host identifier bits are all ones? =>... */
&& ((addr & ~ip_addr.ip4_addr_get_u32(netif.netmask)) ==
(IPADDR_BROADCAST & ~ip_addr.ip4_addr_get_u32(netif.netmask))))
{
/* => network broadcast address */
return(true);
}
else
{
return(false);
}
}
private void recv(object arg, udp_pcb pcb, pbuf p, ip_addr addr, ushort port)
{
System.Diagnostics.Debug.Assert((arg == this) && (pcb == m_Pcb));
pointer data = new pointer(new byte[sizeof(ushort) + T_IPV4EP.length + p.tot_len], 0);
T_IPV4EP p_dstaddr = new T_IPV4EP(data, sizeof(ushort));
pointer p_dat = new pointer(data, sizeof(ushort) + T_IPV4EP.length);
data.SetValue(p.tot_len);
p_dstaddr.ipaddr = lwip.lwip_ntohl(addr.addr);
p_dstaddr.portno = lwip.lwip_ntohs(port);
for (pbuf q = p; q != null; q = q.next)
{
pointer.memcpy(p_dat, q.payload, q.len);
p_dat += q.len;
}
lock (m_CallBack) {
m_CallBack.Enqueue(data);
}
SetState(true, TMO.TMO_POL, null, OnTimeOut);
}
public ER SendData(T_IPV4EP p_dstaddr, pointer p_dat, int len, TMO tmout)
{
pbuf buf;
ip_addr addr = new ip_addr(lwip.lwip_htonl(p_dstaddr.ipaddr));
buf = m_lwIP.pbuf_alloc(pbuf_layer.PBUF_TRANSPORT, (ushort)len, pbuf_type.PBUF_POOL);
if (buf == null)
{
return(ER.E_NOMEM);
}
int pos = 0;
for (pbuf q = buf; q != null; q = q.next)
{
pointer.memcpy(q.payload, new pointer(p_dat, pos), q.len);
pos += q.len;
}
m_lwIP.udp.udp_sendto(m_Pcb, buf, addr, p_dstaddr.portno);
return(ER.E_OK);
}
public static bool ip_addr_ismulticast(ip_addr addr1)
{
return (((addr1).addr & lwip.PP_HTONL(0xf0000000U)) == lwip.PP_HTONL(0xe0000000U));
}
public static bool ip_addr_isbroadcast(ip_addr ipaddr, lwip netif)
{
return ip_addr.ip4_addr_isbroadcast(ipaddr.addr, netif);
}
/** Get the network address by combining host address with netmask */
public static void ip_addr_get_network(ip_addr target, ip_addr host, ip_addr netmask)
{
target.addr = host.addr & netmask.addr;
}
/** Copy IP address - faster than ip_addr.ip_addr_set: no null check */
public static void ip_addr_copy(ip_addr dest, ip_addr src)
{
dest.addr = src.addr;
}
/**
* Same as ipaddr_ntoa, but reentrant since a user-supplied buffer is used.
*
* @param addr ip address in network order to convert
* @param buf target buffer where the pointer is stored
* @param buflen length of buf
* @return either pointer to buf which now holds the ASCII
* representation of addr or null if buf was too small
*/
public static string ipaddr_ntoa_r(ip_addr addr, char[] buf)
{
byte[] s_addr;
char[] inv = new char[3];
int rp;
int ap;
byte rem;
byte n;
byte i;
int len = 0;
s_addr = BitConverter.GetBytes(ip_addr.ip4_addr_get_u32(addr));
rp = 0;
ap = 0;
for (n = 0; n < 4; n++) {
i = 0;
do {
rem = (byte)(s_addr[ap] % 10);
s_addr[ap] /= (byte)10;
inv[i++] = (char)('0' + rem);
} while (s_addr[ap] != 0);
while ((i--) != 0) {
if (len++ >= buf.Length) {
return null;
}
buf[rp++] = inv[i];
}
if (len++ >= buf.Length) {
return null;
}
buf[rp++] = '.';
ap++;
}
buf[--rp] = '\0';
return buf.ToString();
}
public static ushort ip4_addr4_16(ip_addr ipaddr)
{
return((ushort)ip_addr.ip4_addr4(ipaddr));
}
/** Set address to loopback address */
public static void ip_addr_set_loopback(ip_addr ipaddr)
{
ipaddr.addr = lwip.PP_HTONL(IPADDR_LOOPBACK);
}
public static bool ip_addr_netmask_valid(ip_addr netmask)
{
return(ip_addr.ip4_addr_netmask_valid((netmask).addr));
}
public static bool ip_addr_ismulticast(ip_addr addr1)
{
return(((addr1).addr & lwip.PP_HTONL(0xf0000000U)) == lwip.PP_HTONL(0xe0000000U));
}
static ip_addr()
{
IP_ADDR_ANY = ip_addr_any;
IP_ADDR_BROADCAST = ip_addr_broadcast;
}
public static bool ip_addr_islinklocal(ip_addr addr1)
{
return(((addr1).addr & lwip.PP_HTONL(0xffff0000U)) == lwip.PP_HTONL(0xa9fe0000U));
}
public static byte ip4_addr4(ip_addr ipaddr)
{
return(BitConverter.GetBytes(ipaddr.addr)[3]);
}
/**
* Convert numeric IP address into decimal dotted ASCII representation.
* returns ptr to static buffer; not reentrant!
*
* @param addr ip address in network order to convert
* @return pointer to a global static (!) buffer that holds the ASCII
* represenation of addr
*/
public static string ipaddr_ntoa(ip_addr addr)
{
char[] str = new char[16];
return(ipaddr_ntoa_r(addr, str));
}
/**
* Check whether "cp" is a valid ascii representation
* of an Internet address and convert to a binary address.
* Returns 1 if the address is valid, 0 if not.
* This replaces inet_addr, the return value from which
* cannot distinguish between failure and a local broadcast address.
*
* @param cp IP address in ascii represenation (e.g. "127.0.0.1")
* @param addr pointer to which to save the ip address in network order
* @return 1 if cp could be converted to addr, 0 on failure
*/
public static int ipaddr_aton(string cp, ip_addr addr)
{
uint val;
byte @base;
char c;
uint[] parts = new uint[4];
int pp = 0;
int p = 0;
cp += "\0";
c = cp[0];
for (;;)
{
/*
* Collect number up to ``.''.
* Values are specified as for C:
* 0x=hex, 0=octal, 1-9=decimal.
*/
if (!isdigit(c))
{
return(0);
}
val = 0;
@base = 10;
if (c == '0')
{
c = cp[++p];
if (c == 'x' || c == 'X')
{
@base = 16;
c = cp[++p];
}
else
{
@base = 8;
}
}
for (;;)
{
if (isdigit(c))
{
val = (val * @base) + (uint)(c - (byte)'0');
c = cp[++p];
}
else if (@base == 16 && isxdigit(c))
{
val = (val << 4) | (uint)(c + 10 - (islower(c) ? (byte)'a' : (byte)'A'));
c = cp[++p];
}
else
{
break;
}
}
if (c == '.')
{
/*
* Internet format:
* a.b.c.d
* a.b.c (with c treated as 16 bits)
* a.b (with b treated as 24 bits)
*/
if (pp >= 3)
{
return(0);
}
parts[pp++] = val;
c = cp[++p];
}
else
{
break;
}
}
/*
* Check for trailing characters.
*/
if (c != '\0' && !isspace(c))
{
return(0);
}
/*
* Concoct the address according to
* the number of parts specified.
*/
switch (pp + 1)
{
case 0:
return(0); /* initial nondigit */
case 1: /* a -- 32 bits */
break;
case 2: /* a.b -- 8.24 bits */
if (val > 0xffffffUL)
{
return(0);
}
val |= parts[0] << 24;
break;
case 3: /* a.b.c -- 8.8.16 bits */
if (val > 0xffff)
{
return(0);
}
val |= (parts[0] << 24) | (parts[1] << 16);
break;
case 4: /* a.b.c.d -- 8.8.8.8 bits */
if (val > 0xff)
{
return(0);
}
val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
break;
default:
lwip.LWIP_ASSERT("unhandled", false);
break;
}
if (addr != null)
{
ip_addr.ip4_addr_set_u32(addr, lwip.lwip_htonl(val));
}
return(1);
}
public static bool ip_addr_netmask_valid(ip_addr netmask)
{
return ip_addr.ip4_addr_netmask_valid((netmask).addr);
}
/** Set address to IPADDR_ANY (no need for lwip.lwip_htonl()) */
public static void ip_addr_set_any(ip_addr ipaddr)
{
ipaddr.addr = IPADDR_ANY;
}
/** Like ip.ip_output, but takes and addr_hint pointer that is passed on to netif.addr_hint
* before calling ip_output_if.
*
* @param p the packet to send (p.payload points to the data, e.g. next
protocol header; if dest == ip.IP_HDRINCL, p already includes an IP
header and p.payload points to that IP header)
* @param src the source IP address to send from (if src == IP_ADDR_ANY, the
* IP address of the netif used to send is used as source address)
* @param dest the destination IP address to send the packet to
* @param ttl the TTL value to be set in the IP header
* @param tos the TOS value to be set in the IP header
* @param proto the PROTOCOL to be set in the IP header
* @param addr_hint address hint pointer set to netif.addr_hint before
* calling ip_output_if()
*
* @return err_t.ERR_RTE if no route is found
* see ip_output_if() for more return values
*/
public err_t ip_output_hinted(pbuf p, ip_addr src, ip_addr dest,
byte ttl, byte tos, byte proto, object addr_hint)
{
err_t err;
/* pbufs passed to IP must have a @ref-count of 1 as their payload pointer
gets altered as the packet is passed down the stack */
lwip.LWIP_ASSERT("p.ref == 1", p.@ref == 1);
err = ip_output_if(p, src, dest, ttl, tos, proto);
return err;
}
/** For backwards compatibility */
public static string ip_ntoa(ip_addr ipaddr)
{
return ipaddr_ntoa(ipaddr);
}
public static bool ip_addr_isbroadcast(ip_addr ipaddr, lwip netif)
{
return(ip_addr.ip4_addr_isbroadcast(ipaddr.addr, netif));
}
/**
* Convert numeric IP address into decimal dotted ASCII representation.
* returns ptr to static buffer; not reentrant!
*
* @param addr ip address in network order to convert
* @return pointer to a global static (!) buffer that holds the ASCII
* represenation of addr
*/
public static string ipaddr_ntoa(ip_addr addr)
{
char[] str = new char[16];
return ipaddr_ntoa_r(addr, str);
}
static ip_addr()
{
IP_ADDR_ANY = ip_addr_any;
IP_ADDR_BROADCAST = ip_addr_broadcast;
}
public static bool ip_addr_cmp(ip_addr addr1, ip_addr addr2)
{
return ((addr1).addr == (addr2).addr);
}
/** Set an IP address given by the four byte-parts.
Little-endian version that prevents the use of lwip.lwip_htonl. */
public static void IP4_ADDR(ip_addr ipaddr, byte a, byte b, byte c, byte d)
{
ipaddr.addr = ((uint)((d) & 0xff) << 24) |
((uint)((c) & 0xff) << 16) |
((uint)((b) & 0xff) << 8) |
(uint)((a) & 0xff);
}
public static void ip_addr_debug_print(uint debug, ip_addr ipaddr)
{
uITron3.lwip.LWIP_DEBUGF(debug, "{0}.{1}.{2}.{3}",
ipaddr != null ? ip_addr.ip4_addr1_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr2_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr3_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr4_16(ipaddr) : 0);
}
public static byte ip4_addr4(ip_addr ipaddr)
{
return BitConverter.GetBytes(ipaddr.addr)[3];
}
public static bool ip_addr_isany(ip_addr addr1)
{
return ((addr1) == null || (addr1).addr == IPADDR_ANY);
}
public static bool ip_addr_isany(ip_addr addr1)
{
return((addr1) == null || (addr1).addr == IPADDR_ANY);
}
public static bool ip_addr_islinklocal(ip_addr addr1)
{
return (((addr1).addr & lwip.PP_HTONL(0xffff0000U)) == lwip.PP_HTONL(0xa9fe0000U));
}
public static bool ip_addr_cmp(ip_addr addr1, ip_addr addr2)
{
return((addr1).addr == (addr2).addr);
}
/**
* Determine if two address are on the same network.
*
* @arg addr1 IP address 1
* @arg addr2 IP address 2
* @arg mask network identifier mask
* @return !0 if the network identifiers of both address match
*/
public static bool ip_addr_netcmp(ip_addr addr1, ip_addr addr2, ip_addr mask)
{
return (((addr1).addr &
(mask).addr) ==
((addr2).addr &
(mask).addr));
}
/** IPv4 only: set the IP address given as an uint */
public static void ip4_addr_set_u32(ip_addr dest_ipaddr, uint src_u32)
{
dest_ipaddr.addr = src_u32;
}
/** Safely copy one IP address to another (src may be null) */
public static void ip_addr_set(ip_addr dest, ip_addr src)
{
dest.addr = (src == null ? 0 : src.addr);
}
/** MEMCPY-like copying of IP addresses where addresses are known to be
* 16-bit-aligned if the port is correctly configured (so a port could define
* this to copying 2 ushort's) - no null-pointer-checking needed. */
public static void IPADDR2_COPY(ip_addr dest, ip_addr src)
{
dest.addr = src.addr;
}
/** Safely copy one IP address to another and change byte order
* from host- to network-order. */
public static void ip_addr_set_hton(ip_addr dest, ip_addr src)
{
dest.addr =
(src == null ? 0U :
lwip.lwip_htonl(src.addr));
}
/**
* Ascii internet address interpretation routine.
* The value returned is in network order.
*
* @param cp IP address in ascii represenation (e.g. "127.0.0.1")
* @return ip address in network order
*/
public static uint ipaddr_addr(string cp)
{
ip_addr val = new ip_addr(0);
if (ipaddr_aton(cp, val) != 0) {
return ip_addr.ip4_addr_get_u32(val);
}
return (IPADDR_NONE);
}
/** Set complete address to zero */
public static void ip_addr_set_zero(ip_addr ipaddr)
{
ipaddr.addr = 0;
}
/**
* Check whether "cp" is a valid ascii representation
* of an Internet address and convert to a binary address.
* Returns 1 if the address is valid, 0 if not.
* This replaces inet_addr, the return value from which
* cannot distinguish between failure and a local broadcast address.
*
* @param cp IP address in ascii represenation (e.g. "127.0.0.1")
* @param addr pointer to which to save the ip address in network order
* @return 1 if cp could be converted to addr, 0 on failure
*/
public static int ipaddr_aton(string cp, ip_addr addr)
{
uint val;
byte @base;
char c;
uint[] parts = new uint[4];
int pp = 0;
int p = 0;
cp += "\0";
c = cp[0];
for (;;) {
/*
* Collect number up to ``.''.
* Values are specified as for C:
* 0x=hex, 0=octal, 1-9=decimal.
*/
if (!isdigit(c))
return (0);
val = 0;
@base = 10;
if (c == '0') {
c = cp[++p];
if (c == 'x' || c == 'X') {
@base = 16;
c = cp[++p];
}
else
@base = 8;
}
for (;;) {
if (isdigit(c)) {
val = (val * @base) + (uint)(c - (byte)'0');
c = cp[++p];
}
else if (@base == 16 && isxdigit(c)) {
val = (val << 4) | (uint)(c + 10 - (islower(c) ? (byte)'a' : (byte)'A'));
c = cp[++p];
}
else
break;
}
if (c == '.') {
/*
* Internet format:
* a.b.c.d
* a.b.c (with c treated as 16 bits)
* a.b (with b treated as 24 bits)
*/
if (pp >= 3) {
return (0);
}
parts[pp++] = val;
c = cp[++p];
}
else
break;
}
/*
* Check for trailing characters.
*/
if (c != '\0' && !isspace(c)) {
return (0);
}
/*
* Concoct the address according to
* the number of parts specified.
*/
switch (pp + 1) {
case 0:
return (0); /* initial nondigit */
case 1: /* a -- 32 bits */
break;
case 2: /* a.b -- 8.24 bits */
if (val > 0xffffffUL) {
return (0);
}
val |= parts[0] << 24;
break;
case 3: /* a.b.c -- 8.8.16 bits */
if (val > 0xffff) {
return (0);
}
val |= (parts[0] << 24) | (parts[1] << 16);
break;
case 4: /* a.b.c.d -- 8.8.8.8 bits */
if (val > 0xff) {
return (0);
}
val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
break;
default:
lwip.LWIP_ASSERT("unhandled", false);
break;
}
if (addr != null) {
ip_addr.ip4_addr_set_u32(addr, lwip.lwip_htonl(val));
}
return (1);
}
internal static string to_string(ip_addr ipaddr)
{
return String.Format("{0}.{1}.{2}.{3}",
ipaddr != null ? ip_addr.ip4_addr1_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr2_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr3_16(ipaddr) : 0,
ipaddr != null ? ip_addr.ip4_addr4_16(ipaddr) : 0);
}
/** For backwards compatibility */
public static string ip_ntoa(ip_addr ipaddr)
{
return(ipaddr_ntoa(ipaddr));
}
internal err_t ip_input(pbuf p, ip_addr src, ip_addr dest, byte proto)
{
++lwip_stats.ip.recv;
/* copy IP addresses to aligned ip_addr */
ip_addr.ip_addr_copy(current_iphdr_dest, dest);
ip_addr.ip_addr_copy(current_iphdr_src, src);
/* broadcast or multicast packet source address? Compliant with RFC 1122: 3.2.1.3 */
#if IP_ACCEPT_LINK_LAYER_ADDRESSING
/* DHCP servers need 0.0.0.0 to be allowed as source address (RFC 1.1.2.2: 3.2.1.3/a) */
if (check_ip_src != 0 && !ip_addr.ip_addr_isany(ip.current_iphdr_src))
#endif // IP_ACCEPT_LINK_LAYER_ADDRESSING
{
if ((ip_addr.ip_addr_isbroadcast(current_iphdr_src, this)) ||
(ip_addr.ip_addr_ismulticast(current_iphdr_src)))
{
/* packet source is not valid */
lwip.LWIP_DEBUGF(opt.IP_DEBUG | lwip.LWIP_DBG_TRACE | lwip.LWIP_DBG_LEVEL_WARNING, "ip_input: packet source is not valid.\n");
/* free (drop) packet pbufs */
pbuf_free(p);
++lwip_stats.ip.drop;
//snmp.snmp_inc_ipinaddrerrors();
//snmp.snmp_inc_ipindiscards();
return(err_t.ERR_OK);
}
}
/* send to upper layers */
lwip.LWIP_DEBUGF(opt.IP_DEBUG, "ip_input: \n");
#if IP_DEBUG
ip_debug_print(p);
#endif
lwip.LWIP_DEBUGF(opt.IP_DEBUG, "ip_input: p.len {0} p.tot_len {1}\n", p.len, p.tot_len);
//lwip.current_header = iphdr;
#if LWIP_RAW
/* raw input did not eat the packet? */
if (raw.raw_input(p, inp) == 0)
#endif // LWIP_RAW
{
switch (proto)
{
#if LWIP_UDP
case lwip.IP_PROTO_UDP:
#if LWIP_UDPLITE
case lwip.IP_PROTO_UDPLITE:
#endif // LWIP_UDPLITE
//snmp.snmp_inc_ipindelivers();
udp.udp_input(p, this, proto == lwip.IP_PROTO_UDPLITE);
break;
#endif // LWIP_UDP
#if LWIP_TCP
case lwip.IP_PROTO_TCP:
//snmp.snmp_inc_ipindelivers();
tcp.tcp_input(p, this);
break;
#endif // LWIP_TCP
#if LWIP_ICMP
case lwip.IP_PROTO_ICMP:
//snmp.snmp_inc_ipindelivers();
lwip.icmp.icmp_input(p, inp);
break;
#endif // LWIP_ICMP
#if LWIP_IGMP
case lwip.IP_PROTO_IGMP:
lwip.igmp.igmp_input(p, inp, lwip.current_iphdr_dest);
break;
#endif // LWIP_IGMP
default:
#if LWIP_ICMP
/* send ICMP destination protocol unreachable unless is was a broadcast */
if (!ip_addr.ip_addr_isbroadcast(lwip.current_iphdr_dest, inp) &&
!ip_addr.ip_addr_ismulticast(lwip.current_iphdr_dest))
{
p.payload = iphdr;
lwip.icmp.icmp_dest_unreach(p, icmp_dur_type.ICMP_DUR_PROTO);
}
#endif // LWIP_ICMP
pbuf_free(p);
LWIP_DEBUGF(opt.IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, "Unsupported transport protocol {0}\n", proto);
++lwip_stats.ip.proterr;
++lwip_stats.ip.drop;
//snmp.snmp_inc_ipinunknownprotos();
break;
}
}
//lwip.current_header = null;
ip_addr.ip_addr_set_any(current_iphdr_src);
ip_addr.ip_addr_set_any(current_iphdr_dest);
return(err_t.ERR_OK);
}
/** IPv4 only: get the IP address as an uint */
public static uint ip4_addr_get_u32(ip_addr src_ipaddr)
{
return src_ipaddr.addr;
}
public static ushort ip4_addr4_16(ip_addr ipaddr)
{
return ((ushort)ip_addr.ip4_addr4(ipaddr));
}
/**
* Determine if an address is a broadcast address on a network interface
*
* @param addr address to be checked
* @param netif the network interface against which the address is checked
* @return returns non-zero if the address is a broadcast address
*/
public static bool ip4_addr_isbroadcast(uint addr, lwip netif)
{
ip_addr ipaddr = new ip_addr(0);
ip_addr.ip4_addr_set_u32(ipaddr, addr);
/* all ones (broadcast) or all zeroes (old skool broadcast) */
if ((~addr == IPADDR_ANY) ||
(addr == IPADDR_ANY)) {
return true;
/* no broadcast support on this network interface? */
}
else if ((netif.flags & lwip.NETIF_FLAG_BROADCAST) == 0) {
/* the given address cannot be a broadcast address
* nor can we check against any broadcast addresses */
return false;
/* address matches network interface address exactly? => no broadcast */
}
else if (addr == ip_addr.ip4_addr_get_u32(netif.ip_addr)) {
return false;
/* on the same (sub) network... */
}
else if (ip_addr.ip_addr_netcmp(ipaddr, netif.ip_addr, netif.netmask)
/* ...and host identifier bits are all ones? =>... */
&& ((addr & ~ip_addr.ip4_addr_get_u32(netif.netmask)) ==
(IPADDR_BROADCAST & ~ip_addr.ip4_addr_get_u32(netif.netmask)))) {
/* => network broadcast address */
return true;
}
else {
return false;
}
}