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IPv4: Add simple pseudorandom ephemeral port allocators for TCP and UDP.

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This commit is contained in:
Andreas Kling 2019-03-18 04:03:44 +01:00
parent 77a782a67e
commit c24d4b07db
8 changed files with 54 additions and 20 deletions
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14
Kernel/IPv4Socket.cpp
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@ -112,11 +112,15 @@ bool IPv4Socket::can_write(SocketRole) const
return true;
}
void IPv4Socket::allocate_source_port_if_needed()
int IPv4Socket::allocate_source_port_if_needed()
{
if (m_source_port)
return;
protocol_allocate_source_port();
return m_source_port;
int port = protocol_allocate_source_port();
if (port < 0)
return port;
m_source_port = (word)port;
return port;
}
ssize_t IPv4Socket::sendto(const void* data, size_t data_length, int flags, const sockaddr* addr, socklen_t addr_length)
@ -142,7 +146,9 @@ ssize_t IPv4Socket::sendto(const void* data, size_t data_length, int flags, cons
m_destination_port = ntohs(ia.sin_port);
}
allocate_source_port_if_needed();
int rc = allocate_source_port_if_needed();
if (rc < 0)
return rc;
kprintf("sendto: destination=%s:%u\n", m_destination_address.to_string().characters(), m_destination_port);