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| | #include <ruby.h>
#include "extconf.h"
#include <sys/socket.h>
#include <netinet/in.h>
#if defined(HAVE_LINUX_TCP_H)
# include <linux/tcp.h>
#else
# if defined(HAVE_NETINET_TCP_H)
# include <netinet/tcp.h>
# endif
# if defined(HAVE_NETINET_TCP_FSM_H)
# include <netinet/tcp_fsm.h>
# endif
#endif
#ifdef HAVE_TYPE_STRUCT_TCP_INFO
#include "my_fileno.h"
CFUNC_tcp_info_tcpi_state
CFUNC_tcp_info_tcpi_ca_state
CFUNC_tcp_info_tcpi_retransmits
CFUNC_tcp_info_tcpi_probes
CFUNC_tcp_info_tcpi_backoff
CFUNC_tcp_info_tcpi_options
CFUNC_tcp_info_tcpi_snd_wscale
CFUNC_tcp_info_tcpi_rcv_wscale
CFUNC_tcp_info_tcpi_rto
CFUNC_tcp_info_tcpi_ato
CFUNC_tcp_info_tcpi_snd_mss
CFUNC_tcp_info_tcpi_rcv_mss
CFUNC_tcp_info_tcpi_unacked
CFUNC_tcp_info_tcpi_sacked
CFUNC_tcp_info_tcpi_lost
CFUNC_tcp_info_tcpi_retrans
CFUNC_tcp_info_tcpi_fackets
CFUNC_tcp_info_tcpi_last_data_sent
CFUNC_tcp_info_tcpi_last_ack_sent
CFUNC_tcp_info_tcpi_last_data_recv
CFUNC_tcp_info_tcpi_last_ack_recv
CFUNC_tcp_info_tcpi_pmtu
CFUNC_tcp_info_tcpi_rcv_ssthresh
CFUNC_tcp_info_tcpi_rtt
CFUNC_tcp_info_tcpi_rttvar
CFUNC_tcp_info_tcpi_snd_ssthresh
CFUNC_tcp_info_tcpi_snd_cwnd
CFUNC_tcp_info_tcpi_advmss
CFUNC_tcp_info_tcpi_reordering
CFUNC_tcp_info_tcpi_rcv_rtt
CFUNC_tcp_info_tcpi_rcv_space
CFUNC_tcp_info_tcpi_total_retrans
static size_t tcpi_memsize(const void *ptr)
{
return sizeof(struct tcp_info);
}
static const rb_data_type_t tcpi_type = {
"tcp_info",
{ NULL, RUBY_TYPED_DEFAULT_FREE, tcpi_memsize, /* reserved */ },
/* parent, data, [ flags ] */
};
static VALUE alloc(VALUE klass)
{
struct tcp_info *info;
return TypedData_Make_Struct(klass, struct tcp_info, &tcpi_type, info);
}
/*
* call-seq:
*
* Raindrops::TCP_Info.new(tcp_socket) -> TCP_Info object
*
* Reads a TCP_Info object from any given +tcp_socket+. See the tcp(7)
* manpage and /usr/include/linux/tcp.h for more details.
*/
static VALUE init(VALUE self, VALUE io)
{
int fd = my_fileno(io);
struct tcp_info *info = DATA_PTR(self);
socklen_t len = (socklen_t)sizeof(struct tcp_info);
int rc = getsockopt(fd, IPPROTO_TCP, TCP_INFO, info, &len);
if (rc != 0)
rb_sys_fail("getsockopt");
return self;
}
void Init_raindrops_tcp_info(void)
{
VALUE cRaindrops = rb_define_class("Raindrops", rb_cObject);
VALUE cTCP_Info;
/*
* Document-class: Raindrops::TCP_Info
*
* This is used to wrap "struct tcp_info" as described in tcp(7)
* and /usr/include/linux/tcp.h. The following readers methods
* are defined corresponding to the "tcpi_" fields in the
* tcp_info struct.
*
* In particular, the +last_data_recv+ field is useful for measuring
* the amount of time a client spent in the listen queue before
* +accept()+, but only if +TCP_DEFER_ACCEPT+ is used with the
* listen socket (it is on by default in Unicorn).
*
* - state
* - ca_state
* - retransmits
* - probes
* - backoff
* - options
* - snd_wscale
* - rcv_wscale
* - rto
* - ato
* - snd_mss
* - rcv_mss
* - unacked
* - sacked
* - lost
* - retrans
* - fackets
* - last_data_sent
* - last_ack_sent
* - last_data_recv
* - last_ack_recv
* - pmtu
* - rcv_ssthresh
* - rtt
* - rttvar
* - snd_ssthresh
* - snd_cwnd
* - advmss
* - reordering
* - rcv_rtt
* - rcv_space
* - total_retrans
*
* https://kernel.org/doc/man-pages/online/pages/man7/tcp.7.html
*/
cTCP_Info = rb_define_class_under(cRaindrops, "TCP_Info", rb_cObject);
rb_define_alloc_func(cTCP_Info, alloc);
rb_define_private_method(cTCP_Info, "initialize", init, 1);
/*
* Document-method: Raindrops::TCP_Info#get!
*
* call-seq:
*
* info = Raindrops::TCP_Info.new(tcp_socket)
* info.get!(tcp_socket)
*
* Update an existing TCP_Info objects with the latest stats
* from the given socket. This even allows sharing TCP_Info
* objects between different sockets to avoid garbage.
*/
rb_define_method(cTCP_Info, "get!", init, 1);
DEFINE_METHOD_tcp_info_tcpi_state;
DEFINE_METHOD_tcp_info_tcpi_ca_state;
DEFINE_METHOD_tcp_info_tcpi_retransmits;
DEFINE_METHOD_tcp_info_tcpi_probes;
DEFINE_METHOD_tcp_info_tcpi_backoff;
DEFINE_METHOD_tcp_info_tcpi_options;
DEFINE_METHOD_tcp_info_tcpi_snd_wscale;
DEFINE_METHOD_tcp_info_tcpi_rcv_wscale;
DEFINE_METHOD_tcp_info_tcpi_rto;
DEFINE_METHOD_tcp_info_tcpi_ato;
DEFINE_METHOD_tcp_info_tcpi_snd_mss;
DEFINE_METHOD_tcp_info_tcpi_rcv_mss;
DEFINE_METHOD_tcp_info_tcpi_unacked;
DEFINE_METHOD_tcp_info_tcpi_sacked;
DEFINE_METHOD_tcp_info_tcpi_lost;
DEFINE_METHOD_tcp_info_tcpi_retrans;
DEFINE_METHOD_tcp_info_tcpi_fackets;
DEFINE_METHOD_tcp_info_tcpi_last_data_sent;
DEFINE_METHOD_tcp_info_tcpi_last_ack_sent;
DEFINE_METHOD_tcp_info_tcpi_last_data_recv;
DEFINE_METHOD_tcp_info_tcpi_last_ack_recv;
DEFINE_METHOD_tcp_info_tcpi_pmtu;
DEFINE_METHOD_tcp_info_tcpi_rcv_ssthresh;
DEFINE_METHOD_tcp_info_tcpi_rtt;
DEFINE_METHOD_tcp_info_tcpi_rttvar;
DEFINE_METHOD_tcp_info_tcpi_snd_ssthresh;
DEFINE_METHOD_tcp_info_tcpi_snd_cwnd;
DEFINE_METHOD_tcp_info_tcpi_advmss;
DEFINE_METHOD_tcp_info_tcpi_reordering;
DEFINE_METHOD_tcp_info_tcpi_rcv_rtt;
DEFINE_METHOD_tcp_info_tcpi_rcv_space;
DEFINE_METHOD_tcp_info_tcpi_total_retrans;
}
#endif /* HAVE_STRUCT_TCP_INFO */
|