c13adb9c12
Currently dhcp assumes that cpu 0 gets all the packets and redistributes them by itself. With multiqueue this is not necessary the case, so the current trick to disable forwarding by installing special dhcp forward() function will not work. Rework it by installing packet filter on all cpus before running dhcp and forward all dhcp packets to cpu 0.
67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
/*
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* Copyright 2014 Cloudius Systems
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*/
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#ifndef NET_DHCP_HH_
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#define NET_DHCP_HH_
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#include "ip.hh"
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#include "core/reactor.hh"
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namespace net {
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/*
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* Simplistic DHCP query class.
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* Due to the nature of the native stack,
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* it operates on an "ipv4" object instead of,
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* for example, an interface.
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*/
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class dhcp {
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public:
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dhcp(ipv4 &);
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dhcp(dhcp &&);
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~dhcp();
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static const clock_type::duration default_timeout;
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struct lease {
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ipv4_address ip;
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ipv4_address netmask;
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ipv4_address broadcast;
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ipv4_address gateway;
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ipv4_address dhcp_server;
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std::vector<ipv4_address> name_servers;
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std::chrono::seconds lease_time;
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std::chrono::seconds renew_time;
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std::chrono::seconds rebind_time;
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uint16_t mtu = 0;
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};
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typedef future<bool, lease> result_type;
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/**
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* Runs a discover/request sequence on the ipv4 "stack".
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* During this execution the ipv4 will be "hijacked"
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* more or less (through packet filter), and while not
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* inoperable, most likely quite less efficient.
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*
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* Please note that this does _not_ modify the ipv4 object bound.
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* It only makes queries and records replys for the related NIC.
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* It is up to caller to use the returned information as he se fit.
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*/
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result_type discover(const clock_type::duration & = default_timeout);
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result_type renew(const lease &, const clock_type::duration & = default_timeout);
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ip_packet_filter* get_ipv4_filter();
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private:
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class impl;
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std::unique_ptr<impl> _impl;
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};
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}
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#endif /* NET_DHCP_HH_ */
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