Diff: lwip/core/ipv4/ip_addr.c

Revision:

1:9d93f4dc2f46

Parent:

0:8b387bed54c2

--- a/lwip/core/ipv4/ip_addr.c	Mon Jan 10 21:03:11 2011 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,312 +0,0 @@
-/**
- * @file
- * This is the IPv4 address tools implementation.
- *
- */
-
-/*
- * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
- * All rights reserved. 
- * 
- * Redistribution and use in source and binary forms, with or without modification, 
- * are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission. 
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
- * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
- * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
- * OF SUCH DAMAGE.
- *
- * This file is part of the lwIP TCP/IP stack.
- * 
- * Author: Adam Dunkels <adam@sics.se>
- *
- */
-
-#include "lwip/opt.h"
-#include "lwip/ip_addr.h"
-#include "lwip/netif.h"
-
-/* used by IP_ADDR_ANY and IP_ADDR_BROADCAST in ip_addr.h */
-const ip_addr_t ip_addr_any = { IPADDR_ANY };
-const ip_addr_t ip_addr_broadcast = { IPADDR_BROADCAST };
-
-/**
- * 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
- */
-u8_t
-ip4_addr_isbroadcast(u32_t addr, const struct netif *netif)
-{
-  ip_addr_t ipaddr;
-  ip4_addr_set_u32(&ipaddr, addr);
-
-  /* all ones (broadcast) or all zeroes (old skool broadcast) */
-  if ((~addr == IPADDR_ANY) ||
-      (addr == IPADDR_ANY)) {
-    return 1;
-  /* no broadcast support on this network interface? */
-  } else if ((netif->flags & NETIF_FLAG_BROADCAST) == 0) {
-    /* the given address cannot be a broadcast address
-     * nor can we check against any broadcast addresses */
-    return 0;
-  /* address matches network interface address exactly? => no broadcast */
-  } else if (addr == ip4_addr_get_u32(&netif->ip_addr)) {
-    return 0;
-  /*  on the same (sub) network... */
-  } else if (ip_addr_netcmp(&ipaddr, &(netif->ip_addr), &(netif->netmask))
-         /* ...and host identifier bits are all ones? =>... */
-          && ((addr & ~ip4_addr_get_u32(&netif->netmask)) ==
-           (IPADDR_BROADCAST & ~ip4_addr_get_u32(&netif->netmask)))) {
-    /* => network broadcast address */
-    return 1;
-  } else {
-    return 0;
-  }
-}
-
-/** Checks if a netmask is valid (starting with ones, then only zeros)
- *
- * @param netmask the IPv4 netmask to check (in network byte order!)
- * @return 1 if the netmask is valid, 0 if it is not
- */
-u8_t
-ip4_addr_netmask_valid(u32_t netmask)
-{
-  u32_t mask;
-  u32_t nm_hostorder = lwip_htonl(netmask);
-
-  /* first, check for the first zero */
-  for (mask = 1U << 31 ; mask != 0; mask >>= 1) {
-    if ((nm_hostorder & mask) == 0) {
-      break;
-    }
-  }
-  /* then check that there is no one */
-  for (; mask != 0; mask >>= 1) {
-    if ((nm_hostorder & mask) != 0) {
-      /* there is a one after the first zero -> invalid */
-      return 0;
-    }
-  }
-  /* no one after the first zero -> valid */
-  return 1;
-}
-
-/* Here for now until needed in other places in lwIP */
-#ifndef isprint
-#define in_range(c, lo, up)  ((u8_t)c >= lo && (u8_t)c <= up)
-#define isprint(c)           in_range(c, 0x20, 0x7f)
-#define isdigit(c)           in_range(c, '0', '9')
-#define isxdigit(c)          (isdigit(c) || in_range(c, 'a', 'f') || in_range(c, 'A', 'F'))
-#define islower(c)           in_range(c, 'a', 'z')
-#define isspace(c)           (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v')
-#endif
-
-/**
- * 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
- */
-u32_t
-ipaddr_addr(const char *cp)
-{
-  ip_addr_t val;
-
-  if (ipaddr_aton(cp, &val)) {
-    return ip4_addr_get_u32(&val);
-  }
-  return (IPADDR_NONE);
-}
-
-/**
- * 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
- */
-int
-ipaddr_aton(const char *cp, ip_addr_t *addr)
-{
-  u32_t val;
-  u8_t base;
-  char c;
-  u32_t parts[4];
-  u32_t *pp = parts;
-
-  c = *cp;
-  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;
-      if (c == 'x' || c == 'X') {
-        base = 16;
-        c = *++cp;
-      } else
-        base = 8;
-    }
-    for (;;) {
-      if (isdigit(c)) {
-        val = (val * base) + (int)(c - '0');
-        c = *++cp;
-      } else if (base == 16 && isxdigit(c)) {
-        val = (val << 4) | (int)(c + 10 - (islower(c) ? 'a' : 'A'));
-        c = *++cp;
-      } 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 >= parts + 3) {
-        return (0);
-      }
-      *pp++ = val;
-      c = *++cp;
-    } 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 - parts + 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_ASSERT("unhandled", 0);
-    break;
-  }
-  if (addr) {
-    ip4_addr_set_u32(addr, htonl(val));
-  }
-  return (1);
-}
-
-/**
- * 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
- */
-char *
-ipaddr_ntoa(const ip_addr_t *addr)
-{
-  static char str[16];
-  return ipaddr_ntoa_r(addr, str, 16);
-}
-
-/**
- * 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 string 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
- */
-char *ipaddr_ntoa_r(const ip_addr_t *addr, char *buf, int buflen)
-{
-  u32_t s_addr;
-  char inv[3];
-  char *rp;
-  u8_t *ap;
-  u8_t rem;
-  u8_t n;
-  u8_t i;
-  int len = 0;
-
-  s_addr = ip4_addr_get_u32(addr);
-
-  rp = buf;
-  ap = (u8_t *)&s_addr;
-  for(n = 0; n < 4; n++) {
-    i = 0;
-    do {
-      rem = *ap % (u8_t)10;
-      *ap /= (u8_t)10;
-      inv[i++] = '0' + rem;
-    } while(*ap);
-    while(i--) {
-      if (len++ >= buflen) {
-        return NULL;
-      }
-      *rp++ = inv[i];
-    }
-    if (len++ >= buflen) {
-      return NULL;
-    }
-    *rp++ = '.';
-    ap++;
-  }
-  *--rp = 0;
-  return buf;
-}