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75 lines
2.6 KiB
C++
75 lines
2.6 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_BASE_IP_PATTERN_H_
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#define NET_BASE_IP_PATTERN_H_
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#include <stdint.h>
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#include <memory>
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#include <string>
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#include <vector>
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#include "base/macros.h"
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#include "base/strings/string_piece.h"
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#include "net/base/net_export.h"
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namespace net {
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class IPAddress;
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// IPPatterns are used to match IP address resolutions for possible augmentation
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// by a MappedIPResolver, which uses IPMappingRules.
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class NET_EXPORT IPPattern {
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public:
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IPPattern();
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~IPPattern();
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// Parse a textual pattern (IP_PATTERN as defined in ip_mapping_rules.h) into
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// |this| and return true if the parsing was successful.
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bool ParsePattern(const std::string& ip_pattern);
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// Test to see if the current pattern in |this| matches the given |address|
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// and return true if it matches.
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bool Match(const IPAddress& address) const;
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bool is_ipv4() const { return is_ipv4_; }
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private:
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class ComponentPattern;
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using Strings = std::vector<std::string>;
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using ComponentPatternList = std::vector<std::unique_ptr<ComponentPattern>>;
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// IPv6 addresses have 8 components, while IPv4 addresses have 4 components.
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// ComponentPattern is used to define patterns to match individual components.
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bool ParseComponentPattern(const base::StringPiece& text,
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ComponentPattern* pattern) const;
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// Convert IP component to an int. Assume hex vs decimal for IPV6 vs V4.
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bool ValueTextToInt(const base::StringPiece& input, uint32_t* output) const;
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bool is_ipv4_;
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// The |ip_mask_| indicates, for each component, if this pattern requires an
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// exact match (OCTET in IPv4, or 4 hex digits in IPv6).
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// For each true element there is an entry in |component_values_|, and false
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// means that an entry from our list of ComponentPattern instances must be
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// applied.
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std::vector<bool> ip_mask_;
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// The vector of fixed values that are requried.
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// Other values may be restricted by the component_patterns_;
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// The class invariant is:
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// ip_mask_.size() == component_patterns_.size()
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// + size(our ComponentPattern list)
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std::vector<uint32_t> component_values_;
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// If only one component position was specified using a range, then this
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// list will only have 1 element (i.e., we only have patterns for each element
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// of ip_mask_ that is false.)
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// We own these elements, and need to destroy them all when we are destroyed.
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ComponentPatternList component_patterns_;
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DISALLOW_COPY_AND_ASSIGN(IPPattern);
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};
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} // namespace net
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#endif // NET_BASE_IP_PATTERN_H_
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