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ircd::net: Add filter attach/detach to socket option suite.

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This commit is contained in:
Jason Volk 2022-07-07 16:42:14 -07:00
parent 57e8e0772d
commit 11e75db293
2 changed files with 85 additions and 0 deletions
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6
include/ircd/net/sock_opts.h
View file

@ -25,6 +25,7 @@ namespace ircd::net
size_t write_bufsz(const socket &);
size_t read_lowat(const socket &);
size_t write_lowat(const socket &);
int attach(const socket &);
void v6only(socket &, const bool &);
void blocking(socket &, const bool &);
@ -36,6 +37,10 @@ namespace ircd::net
void write_bufsz(socket &, const size_t &bytes);
void read_lowat(socket &, const size_t &bytes);
void write_lowat(socket &, const size_t &bytes);
void attach(const int &sd, const int &fd);
void attach(socket &, const int &fd);
void detach(const int &sd, const int &fd);
void detach(socket &, const int &fd);
void set(socket &, const sock_opts &);
}
@ -59,6 +64,7 @@ struct ircd::net::sock_opts
ssize_t write_bufsz { IGN };
ssize_t read_lowat { IGN };
ssize_t write_lowat { IGN };
int ebpf { -1 };
sock_opts(const socket &); // Get options from socket
sock_opts() = default;

79
ircd/net.cc
View file

@ -841,8 +841,65 @@ ircd::net::set(socket &socket,
if(opts.write_lowat != opts.IGN)
net::write_lowat(socket, opts.write_lowat);
if(opts.ebpf != -1)
net::attach(socket, opts.ebpf);
}
void
ircd::net::detach(socket &socket,
const int &prog_fd)
{
ip::tcp::socket &sd(socket);
const auto &fd
{
sd.lowest_layer().native_handle()
};
return detach(fd, prog_fd);
}
void
ircd::net::detach(const int &sd,
const int &prog_fd)
#if defined(SO_DETACH_BPF) && defined(SOL_SOCKET)
{
const socklen_t len(sizeof(prog_fd));
sys::call(::setsockopt, sd, SOL_SOCKET, SO_DETACH_BPF, &prog_fd, len);
}
#else
{
#warning "SO_DETACH_BPF is not defined on this platform."
}
#endif
void
ircd::net::attach(socket &socket,
const int &prog_fd)
{
ip::tcp::socket &sd(socket);
const auto &fd
{
sd.lowest_layer().native_handle()
};
return attach(fd, prog_fd);
}
void
ircd::net::attach(const int &sd,
const int &prog_fd)
#if defined(SO_ATTACH_BPF) && defined(SOL_SOCKET)
{
const socklen_t len(sizeof(prog_fd));
sys::call(::setsockopt, sd, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, len);
}
#else
{
#warning "SO_ATTACH_BPF is not defined on this platform."
}
#endif
void
ircd::net::write_lowat(socket &socket,
const size_t &bytes)
@ -995,6 +1052,28 @@ ircd::net::v6only(socket &socket,
sd.set_option(option);
}
int
ircd::net::attach(const socket &socket)
#if defined(SO_ATTACH_BPF) && defined(SOL_SOCKET)
{
const ip::tcp::socket &sd(socket);
const auto &fd
{
mutable_cast(sd).lowest_layer().native_handle()
};
int ret {-1};
socklen_t len(sizeof(ret));
sys::call(::getsockopt, fd, SOL_SOCKET, SO_ATTACH_BPF, &ret, &len);
assert(len <= sizeof(ret));
return ret;
}
#else
{
#warning "SO_ATTACH_BPF is not defined on this platform."
}
#endif
size_t
ircd::net::write_lowat(const socket &socket)
{