Module: wine Branch: master Commit: 89026cf980a55e1baef39b5630da28cbe51f2d9a URL: http://source.winehq.org/git/wine.git/?a=commit;h=89026cf980a55e1baef39b5630...
Author: Thomas Mullaly thomas.mullaly@gmail.com Date: Mon Jun 21 17:03:02 2010 -0400
urlmon: Implemented a parser for IPv4 addresses.
---
dlls/urlmon/uri.c | 202 ++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 201 insertions(+), 1 deletions(-)
diff --git a/dlls/urlmon/uri.c b/dlls/urlmon/uri.c index 526624f..cbd8c15 100644 --- a/dlls/urlmon/uri.c +++ b/dlls/urlmon/uri.c @@ -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; }