ReceiveTempSMS
/
Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

urlmon: Implemented a parser for IPv4 addresses.

This commit is contained in:
Thomas Mullaly 2010-06-21 17:03:02 -04:00 committed by Alexandre Julliard
parent da8904d150
commit 89026cf980
1 changed files with 201 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

202
dlls/urlmon/uri.c
View File

@ -23,6 +23,8 @@
#define NO_SHLWAPI_REG
#include "shlwapi.h"
#define UINT_MAX 0xffffffff
WINE_DEFAULT_DEBUG_CHANNEL(urlmon);
typedef struct {
@ -55,6 +57,8 @@ typedef struct {
BOOL is_relative;
BOOL is_opaque;
BOOL has_implicit_scheme;
BOOL has_implicit_ip;
UINT implicit_ipv4;
const WCHAR *scheme;
DWORD scheme_len;
@ -63,6 +67,10 @@ typedef struct {
const WCHAR *userinfo;
DWORD userinfo_len;
INT userinfo_split;
const WCHAR *host;
DWORD host_len;
Uri_HOST_TYPE host_type;
} parse_data;
static const CHAR hexDigits[] = "0123456789ABCDEF";
@ -252,6 +260,135 @@ static BOOL check_pct_encoded(const WCHAR **ptr) {
return TRUE;
}
/* dec-octet = DIGIT ; 0-9
* / %x31-39 DIGIT ; 10-99
* / "1" 2DIGIT ; 100-199
* / "2" %x30-34 DIGIT ; 200-249
* / "25" %x30-35 ; 250-255
*/
static BOOL check_dec_octet(const WCHAR **ptr) {
const WCHAR *c1, *c2, *c3;
c1 = *ptr;
/* A dec-octet must be at least 1 digit long. */
if(*c1 < '0' || *c1 > '9')
return FALSE;
++(*ptr);
c2 = *ptr;
/* Since the 1 digit requirment was meet, it doesn't
* matter if this is a DIGIT value, it's considered a
* dec-octet.
*/
if(*c2 < '0' || *c2 > '9')
return TRUE;
++(*ptr);
c3 = *ptr;
/* Same explanation as above. */
if(*c3 < '0' || *c3 > '9')
return TRUE;
/* Anything > 255 isn't a valid IP dec-octet. */
if(*c1 >= '2' && *c2 >= '5' && *c3 >= '5') {
*ptr = c1;
return FALSE;
}
++(*ptr);
return TRUE;
}
/* Checks if there is an implicit IPv4 address in the host component of the URI.
* The max value of an implicit IPv4 address is UINT_MAX.
*
* Ex:
* "234567" would be considered an implicit IPv4 address.
*/
static BOOL check_implicit_ipv4(const WCHAR **ptr, UINT *val) {
const WCHAR *start = *ptr;
ULONGLONG ret = 0;
*val = 0;
while(is_num(**ptr)) {
ret = ret*10 + (**ptr - '0');
if(ret > UINT_MAX) {
*ptr = start;
return FALSE;
}
++(*ptr);
}
if(*ptr == start)
return FALSE;
*val = ret;
return TRUE;
}
/* Checks if the string contains an IPv4 address.
*
* This function has a strict mode or a non-strict mode of operation
* When 'strict' is set to FALSE this function will return TRUE if
* the string contains at least 'dec-octet "." dec-octet' since partial
* IPv4 addresses will be normalized out into full IPv4 addresses. When
* 'strict' is set this function expects there to be a full IPv4 address.
*
* IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet
*/
static BOOL check_ipv4address(const WCHAR **ptr, BOOL strict) {
const WCHAR *start = *ptr;
if(!check_dec_octet(ptr)) {
*ptr = start;
return FALSE;
}
if(**ptr != '.') {
*ptr = start;
return FALSE;
}
++(*ptr);
if(!check_dec_octet(ptr)) {
*ptr = start;
return FALSE;
}
if(**ptr != '.') {
if(strict) {
*ptr = start;
return FALSE;
} else
return TRUE;
}
++(*ptr);
if(!check_dec_octet(ptr)) {
*ptr = start;
return FALSE;
}
if(**ptr != '.') {
if(strict) {
*ptr = start;
return FALSE;
} else
return TRUE;
}
++(*ptr);
if(!check_dec_octet(ptr)) {
*ptr = start;
return FALSE;
}
/* Found a four digit ip address. */
return TRUE;
}
/* Tries to parse the scheme name of the URI.
*
* scheme = ALPHA *(ALPHA | NUM | '+' | '-' | '.') as defined by RFC 3896.
@ -448,6 +585,68 @@ static void parse_userinfo(const WCHAR **ptr, parse_data *data, DWORD flags) {
++(*ptr);
}
/* Attempts to parse a IPv4 address from the URI.
*
* NOTES:
* Window's normalizes IPv4 addresses, This means there's three
* possibilities for the URI to contain an IPv4 address.
* 1) A well formed address (ex. 192.2.2.2).
* 2) A partially formed address. For example "192.0" would
* normalize to "192.0.0.0" during canonicalization.
* 3) An implicit IPv4 address. For example "256" would
* normalize to "0.0.1.0" during canonicalization. Also
* note that the maximum value for an implicit IP address
* is UINT_MAX, if the value in the URI exceeds this then
* it is not considered an IPv4 address.
*/
static BOOL parse_ipv4address(const WCHAR **ptr, parse_data *data, DWORD flags) {
const BOOL is_unknown = data->scheme_type == URL_SCHEME_UNKNOWN;
data->host = *ptr;
if(!check_ipv4address(ptr, FALSE)) {
if(!check_implicit_ipv4(ptr, &data->implicit_ipv4)) {
TRACE("(%p %p %x): URI didn't contain anything looking like an IPv4 address.\n",
ptr, data, flags);
*ptr = data->host;
data->host = NULL;
return FALSE;
} else
data->has_implicit_ip = TRUE;
}
/* Check if what we found is the only part of the host name (if it isn't
* we don't have an IPv4 address).
*/
if(!is_auth_delim(**ptr, !is_unknown) && **ptr != ':') {
*ptr = data->host;
data->host = NULL;
data->has_implicit_ip = FALSE;
return FALSE;
}
data->host_len = *ptr - data->host;
data->host_type = Uri_HOST_IPV4;
TRACE("(%p %p %x): IPv4 address found. host=%s host_len=%d host_type=%d\n",
ptr, data, flags, debugstr_wn(data->host, data->host_len),
data->host_len, data->host_type);
return TRUE;
}
/* Parses the host information from the URI.
*
* host = IP-literal / IPv4address / reg-name
*/
static BOOL parse_host(const WCHAR **ptr, parse_data *data, DWORD flags) {
if(!parse_ipv4address(ptr, data, flags)) {
WARN("(%p %p %x): Only IPv4 parsing is implemented so far.\n", ptr, data, flags);
data->host_type = Uri_HOST_UNKNOWN;
}
/* TODO parse IP-Literal / reg-name. */
return TRUE;
}
/* Parses the authority information from the URI.
*
* authority = [ userinfo "@" ] host [ ":" port ]
@ -455,7 +654,8 @@ static void parse_userinfo(const WCHAR **ptr, parse_data *data, DWORD flags) {
static BOOL parse_authority(const WCHAR **ptr, parse_data *data, DWORD flags) {
parse_userinfo(ptr, data, flags);
/* TODO: Parse host and port information. */
if(!parse_host(ptr, data, flags))
return FALSE;
return TRUE;
}