ReactOS  0.4.13-dev-1148-g9b75b67
ip_addr.c File Reference
#include "lwip/opt.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
Include dependency graph for ip_addr.c:

Go to the source code of this file.

Macros

#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')
 

Functions

u8_t ip4_addr_isbroadcast (u32_t addr, const struct netif *netif)
 
u8_t ip4_addr_netmask_valid (u32_t netmask)
 
u32_t ipaddr_addr (const char *cp)
 
int ipaddr_aton (const char *cp, ip_addr_t *addr)
 
charipaddr_ntoa (const ip_addr_t *addr)
 
charipaddr_ntoa_r (const ip_addr_t *addr, char *buf, int buflen)
 

Variables

const ip_addr_t ip_addr_any = { IPADDR_ANY }
 
const ip_addr_t ip_addr_broadcast = { IPADDR_BROADCAST }
 

Detailed Description

This is the IPv4 address tools implementation.

Definition in file ip_addr.c.

Macro Definition Documentation

◆ in_range

#define in_range (   c,
  lo,
  up 
)    ((u8_t)c >= lo && (u8_t)c <= up)

Definition at line 114 of file ip_addr.c.

◆ isdigit

#define isdigit (   c)    in_range(c, '0', '9')

Definition at line 116 of file ip_addr.c.

◆ islower

#define islower (   c)    in_range(c, 'a', 'z')

Definition at line 118 of file ip_addr.c.

◆ isprint

#define isprint (   c)    in_range(c, 0x20, 0x7f)

Definition at line 115 of file ip_addr.c.

◆ isspace

#define isspace (   c)    (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v')

Definition at line 119 of file ip_addr.c.

◆ isxdigit

#define isxdigit (   c)    (isdigit(c) || in_range(c, 'a', 'f') || in_range(c, 'A', 'F'))

Definition at line 117 of file ip_addr.c.

Function Documentation

◆ ip4_addr_isbroadcast()

u8_t ip4_addr_isbroadcast ( u32_t  addr,
const struct netif netif 
)

Determine if an address is a broadcast address on a network interface

Parameters
addraddress to be checked
netifthe network interface against which the address is checked
Returns
returns non-zero if the address is a broadcast address

Definition at line 55 of file ip_addr.c.

56 {
57  ip_addr_t ipaddr;
58  ip4_addr_set_u32(&ipaddr, addr);
59 
60  /* all ones (broadcast) or all zeroes (old skool broadcast) */
61  if ((~addr == IPADDR_ANY) ||
62  (addr == IPADDR_ANY)) {
63  return 1;
64  /* no broadcast support on this network interface? */
65  } else if ((netif->flags & NETIF_FLAG_BROADCAST) == 0) {
66  /* the given address cannot be a broadcast address
67  * nor can we check against any broadcast addresses */
68  return 0;
69  /* address matches network interface address exactly? => no broadcast */
70  } else if (addr == ip4_addr_get_u32(&netif->ip_addr)) {
71  return 0;
72  /* on the same (sub) network... */
73  } else if (ip_addr_netcmp(&ipaddr, &(netif->ip_addr), &(netif->netmask))
74  /* ...and host identifier bits are all ones? =>... */
75  && ((addr & ~ip4_addr_get_u32(&netif->netmask)) ==
77  /* => network broadcast address */
78  return 1;
79  } else {
80  return 0;
81  }
82 }
#define IPADDR_ANY
Definition: ip_addr.h:100
typedefPACK_STRUCT_END struct ip_addr ip_addr_t
Definition: ip_addr.h:64
u8_t flags
Definition: netif.h:192
#define NETIF_FLAG_BROADCAST
Definition: netif.h:72
Definition: netif.h:136
ip_addr_t ip_addr
Definition: netif.h:141
GLenum const GLvoid * addr
Definition: glext.h:9621
#define ip4_addr_set_u32(dest_ipaddr, src_u32)
Definition: ip_addr.h:179
ip_addr_t netmask
Definition: netif.h:142
#define ip_addr_netcmp(addr1, addr2, mask)
Definition: ip_addr.h:194
#define ip4_addr_get_u32(src_ipaddr)
Definition: ip_addr.h:181
#define IPADDR_BROADCAST
Definition: ip_addr.h:102

◆ ip4_addr_netmask_valid()

u8_t ip4_addr_netmask_valid ( u32_t  netmask)

Checks if a netmask is valid (starting with ones, then only zeros)

Parameters
netmaskthe IPv4 netmask to check (in network byte order!)
Returns
1 if the netmask is valid, 0 if it is not

Definition at line 90 of file ip_addr.c.

91 {
92  u32_t mask;
93  u32_t nm_hostorder = lwip_htonl(netmask);
94 
95  /* first, check for the first zero */
96  for (mask = 1UL << 31 ; mask != 0; mask >>= 1) {
97  if ((nm_hostorder & mask) == 0) {
98  break;
99  }
100  }
101  /* then check that there is no one */
102  for (; mask != 0; mask >>= 1) {
103  if ((nm_hostorder & mask) != 0) {
104  /* there is a one after the first zero -> invalid */
105  return 0;
106  }
107  }
108  /* no one after the first zero -> valid */
109  return 1;
110 }
GLenum GLint GLuint mask
Definition: glext.h:6028
u32_t lwip_htonl(u32_t n)
Definition: def.c:88
unsigned long u32_t
Definition: cc.h:25
#define UL
Definition: tui.h:83

◆ ipaddr_addr()

u32_t ipaddr_addr ( const char cp)

Ascii internet address interpretation routine. The value returned is in network order.

Parameters
cpIP address in ascii represenation (e.g. "127.0.0.1")
Returns
ip address in network order

Definition at line 130 of file ip_addr.c.

131 {
132  ip_addr_t val;
133 
134  if (ipaddr_aton(cp, &val)) {
135  return ip4_addr_get_u32(&val);
136  }
137  return (IPADDR_NONE);
138 }
typedefPACK_STRUCT_END struct ip_addr ip_addr_t
Definition: ip_addr.h:64
GLuint GLfloat * val
Definition: glext.h:7180
int ipaddr_aton(const char *cp, ip_addr_t *addr)
Definition: ip_addr.c:152
POINT cp
Definition: magnifier.c:59
#define IPADDR_NONE
Definition: ip_addr.h:96
#define ip4_addr_get_u32(src_ipaddr)
Definition: ip_addr.h:181

◆ ipaddr_aton()

int ipaddr_aton ( const char cp,
ip_addr_t addr 
)

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.

Parameters
cpIP address in ascii represenation (e.g. "127.0.0.1")
addrpointer to which to save the ip address in network order
Returns
1 if cp could be converted to addr, 0 on failure

Definition at line 152 of file ip_addr.c.

153 {
154  u32_t val;
155  u8_t base;
156  char c;
157  u32_t parts[4];
158  u32_t *pp = parts;
159 
160  c = *cp;
161  for (;;) {
162  /*
163  * Collect number up to ``.''.
164  * Values are specified as for C:
165  * 0x=hex, 0=octal, 1-9=decimal.
166  */
167  if (!isdigit(c))
168  return (0);
169  val = 0;
170  base = 10;
171  if (c == '0') {
172  c = *++cp;
173  if (c == 'x' || c == 'X') {
174  base = 16;
175  c = *++cp;
176  } else
177  base = 8;
178  }
179  for (;;) {
180  if (isdigit(c)) {
181  val = (val * base) + (int)(c - '0');
182  c = *++cp;
183  } else if (base == 16 && isxdigit(c)) {
184  val = (val << 4) | (int)(c + 10 - (islower(c) ? 'a' : 'A'));
185  c = *++cp;
186  } else
187  break;
188  }
189  if (c == '.') {
190  /*
191  * Internet format:
192  * a.b.c.d
193  * a.b.c (with c treated as 16 bits)
194  * a.b (with b treated as 24 bits)
195  */
196  if (pp >= parts + 3) {
197  return (0);
198  }
199  *pp++ = val;
200  c = *++cp;
201  } else
202  break;
203  }
204  /*
205  * Check for trailing characters.
206  */
207  if (c != '\0' && !isspace(c)) {
208  return (0);
209  }
210  /*
211  * Concoct the address according to
212  * the number of parts specified.
213  */
214  switch (pp - parts + 1) {
215 
216  case 0:
217  return (0); /* initial nondigit */
218 
219  case 1: /* a -- 32 bits */
220  break;
221 
222  case 2: /* a.b -- 8.24 bits */
223  if (val > 0xffffffUL) {
224  return (0);
225  }
226  val |= parts[0] << 24;
227  break;
228 
229  case 3: /* a.b.c -- 8.8.16 bits */
230  if (val > 0xffff) {
231  return (0);
232  }
233  val |= (parts[0] << 24) | (parts[1] << 16);
234  break;
235 
236  case 4: /* a.b.c.d -- 8.8.8.8 bits */
237  if (val > 0xff) {
238  return (0);
239  }
240  val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
241  break;
242  default:
243  LWIP_ASSERT("unhandled", 0);
244  break;
245  }
246  if (addr) {
248  }
249  return (1);
250 }
#define htonl(x)
Definition: module.h:212
#define isspace(c)
Definition: ip_addr.c:119
#define isxdigit(c)
Definition: ip_addr.c:117
#define LWIP_ASSERT(message, assertion)
Definition: debug.h:66
GLuint base
Definition: 3dtext.c:35
#define pp
Definition: hlsl.yy.c:978
GLuint GLfloat * val
Definition: glext.h:7180
unsigned long u32_t
Definition: cc.h:25
const GLubyte * c
Definition: glext.h:8905
GLenum const GLvoid * addr
Definition: glext.h:9621
#define isdigit(c)
Definition: ip_addr.c:116
#define islower(c)
Definition: ip_addr.c:118
#define ip4_addr_set_u32(dest_ipaddr, src_u32)
Definition: ip_addr.h:179
unsigned char u8_t
Definition: cc.h:23
POINT cp
Definition: magnifier.c:59
#define c
Definition: ke_i.h:80

Referenced by ipaddr_addr().

◆ ipaddr_ntoa()

char* ipaddr_ntoa ( const ip_addr_t addr)

Convert numeric IP address into decimal dotted ASCII representation. returns ptr to static buffer; not reentrant!

Parameters
addrip address in network order to convert
Returns
pointer to a global static (!) buffer that holds the ASCII represenation of addr

Definition at line 261 of file ip_addr.c.

262 {
263  static char str[16];
264  return ipaddr_ntoa_r(addr, str, 16);
265 }
char * ipaddr_ntoa_r(const ip_addr_t *addr, char *buf, int buflen)
Definition: ip_addr.c:276
const WCHAR * str
GLenum const GLvoid * addr
Definition: glext.h:9621

◆ ipaddr_ntoa_r()

char* ipaddr_ntoa_r ( const ip_addr_t addr,
char buf,
int  buflen 
)

Same as ipaddr_ntoa, but reentrant since a user-supplied buffer is used.

Parameters
addrip address in network order to convert
buftarget buffer where the string is stored
buflenlength of buf
Returns
either pointer to buf which now holds the ASCII representation of addr or NULL if buf was too small

Definition at line 276 of file ip_addr.c.

277 {
278  u32_t s_addr;
279  char inv[3];
280  char *rp;
281  u8_t *ap;
282  u8_t rem;
283  u8_t n;
284  u8_t i;
285  int len = 0;
286 
288 
289  rp = buf;
290  ap = (u8_t *)&s_addr;
291  for(n = 0; n < 4; n++) {
292  i = 0;
293  do {
294  rem = *ap % (u8_t)10;
295  *ap /= (u8_t)10;
296  inv[i++] = '0' + rem;
297  } while(*ap);
298  while(i--) {
299  if (len++ >= buflen) {
300  return NULL;
301  }
302  *rp++ = inv[i];
303  }
304  if (len++ >= buflen) {
305  return NULL;
306  }
307  *rp++ = '.';
308  ap++;
309  }
310  *--rp = 0;
311  return buf;
312 }
GLenum GLuint GLenum GLsizei const GLchar * buf
Definition: glext.h:7751
GLdouble n
Definition: glext.h:7729
#define s_addr
Definition: tcpip.h:133
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
smooth NULL
Definition: ftsmooth.c:416
unsigned long u32_t
Definition: cc.h:25
GLenum const GLvoid * addr
Definition: glext.h:9621
GLenum GLsizei len
Definition: glext.h:6722
unsigned char u8_t
Definition: cc.h:23
void int int ULONGLONG int va_list * ap
Definition: winesup.h:32
#define ip4_addr_get_u32(src_ipaddr)
Definition: ip_addr.h:181

Referenced by ipaddr_ntoa().

Variable Documentation

◆ ip_addr_any

const ip_addr_t ip_addr_any = { IPADDR_ANY }

Definition at line 44 of file ip_addr.c.

◆ ip_addr_broadcast

const ip_addr_t ip_addr_broadcast = { IPADDR_BROADCAST }

Definition at line 45 of file ip_addr.c.