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Implemented $tcpinfo_rtt, $tcpinfo_rttvar, $tcpinfo_snd_cwnd, and

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$tcpinfo_rcv_space variables.  Supported on Linux and FreeBSD.
This commit is contained in:
Ruslan Ermilov 2012-03-16 19:15:33 +00:00
parent c2afb66e88
commit 926ded6f4c
2 changed files with 86 additions and 0 deletions
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13
auto/unix
View File

@ -343,6 +343,19 @@ ngx_feature_test="setsockopt(0, IPPROTO_TCP, TCP_KEEPIDLE, NULL, 0);
. auto/feature
ngx_feature="TCP_INFO"
ngx_feature_name="NGX_HAVE_TCP_INFO"
ngx_feature_run=no
ngx_feature_incs="#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>"
ngx_feature_path=
ngx_feature_libs=
ngx_feature_test="socklen_t optlen = sizeof(struct tcp_info);
getsockopt(0, IPPROTO_TCP, TCP_INFO, NULL, &optlen)"
. auto/feature
ngx_feature="accept4()"
ngx_feature_name="NGX_HAVE_ACCEPT4"
ngx_feature_run=no

73
src/http/ngx_http_variables.c
View File

@ -34,6 +34,10 @@ static ngx_int_t ngx_http_variable_cookie(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_argument(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
#if (NGX_HAVE_TCP_INFO)
static ngx_int_t ngx_http_variable_tcpinfo(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
#endif
static ngx_int_t ngx_http_variable_host(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
@ -259,6 +263,20 @@ static ngx_http_variable_t ngx_http_core_variables[] = {
{ ngx_string("pid"), NULL, ngx_http_variable_pid,
0, 0, 0 },
#if (NGX_HAVE_TCP_INFO)
{ ngx_string("tcpinfo_rtt"), NULL, ngx_http_variable_tcpinfo,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("tcpinfo_rttvar"), NULL, ngx_http_variable_tcpinfo,
1, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("tcpinfo_snd_cwnd"), NULL, ngx_http_variable_tcpinfo,
2, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("tcpinfo_rcv_space"), NULL, ngx_http_variable_tcpinfo,
3, NGX_HTTP_VAR_NOCACHEABLE, 0 },
#endif
{ ngx_null_string, NULL, NULL, 0, 0, 0 }
};
@ -884,6 +902,61 @@ ngx_http_variable_argument(ngx_http_request_t *r, ngx_http_variable_value_t *v,
}
#if (NGX_HAVE_TCP_INFO)
static ngx_int_t
ngx_http_variable_tcpinfo(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
struct tcp_info ti;
socklen_t len;
uint32_t value;
len = sizeof(struct tcp_info);
if (getsockopt(r->connection->fd, IPPROTO_TCP, TCP_INFO, &ti, &len) == -1) {
v->not_found = 1;
return NGX_OK;
}
v->data = ngx_pnalloc(r->pool, NGX_INT32_LEN);
if (v->data == NULL) {
return NGX_ERROR;
}
switch (data) {
case 0:
value = ti.tcpi_rtt;
break;
case 1:
value = ti.tcpi_rttvar;
break;
case 2:
value = ti.tcpi_snd_cwnd;
break;
case 3:
value = ti.tcpi_rcv_space;
break;
/* suppress warning */
default:
value = 0;
break;
}
v->len = ngx_sprintf(v->data, "%uD", value) - v->data;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
#endif
static ngx_int_t
ngx_http_variable_host(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)