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Kernel: More work on ICMP support.

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We can now kinda sorta respond to ICMP::EchoRequest although there's
still something not entirely right with the packets.
This commit is contained in:
Andreas Kling 2019-03-12 04:39:50 +01:00
parent 5bd9844dd6
commit 75e0ddd46a
3 changed files with 13 additions and 18 deletions
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17
Kernel/ICMP.h
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@ -25,27 +25,22 @@ public:
word checksum() const { return ntohs(m_checksum); }
void set_checksum(word w) { m_checksum = htons(w); }
const void* payload() const { return &m_payload[0]; }
void* payload() { return &m_payload[0]; }
const void* payload() const { return this + 1; }
void* payload() { return this + 1; }
private:
byte m_type { 0 };
byte m_code { 0 };
word m_checksum { 0 };
dword m_rest_of_header { 0 };
byte m_payload[0];
// NOTE: The rest of the header is 4 bytes
};
static_assert(sizeof(ICMPHeader) == 8);
struct [[gnu::packed]] IPv4ICMPPacket {
IPv4Packet ipv4_packet;
ICMPHeader icmp_header;
};
static_assert(sizeof(ICMPHeader) == 4);
struct [[gnu::packed]] ICMPEchoPacket {
ICMPHeader header;
NetworkOrdered<word> identifier;
NetworkOrdered<word> sequence_number;
byte payload[];
void* payload() { return this + 1; }
const void* payload() const { return this + 1; }
};