Hi, this looks promising when new 4.12 kernel introduced SO_COOKIE socket option which is able to generate a cookie for the socket.
More information and implementation is here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5daab9db7b65df87da26fd8cfa695fb9546a1ddb Waiting for comments. # HG changeset patch # User Donatas Abraitis <donatas.abrai...@gmail.com> # Date 1499424023 -10800 # Fri Jul 07 13:40:23 2017 +0300 # Node ID 55b401978df27f1a1ab4eee4e50615b7551e3c0b # Parent 70e65bf8dfd7a8d39aae8ac3a209d426e6947735 Add new `socket_cookie` variable This would be useful for tracking connections by cookie, not only by request_id as we have it right now. Related: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5daab9db7b65df87da26fd8cfa695fb9546a1ddb diff -r 70e65bf8dfd7 -r 55b401978df2 auto/unix --- a/auto/unix Tue Jul 04 18:50:41 2017 +0300 +++ b/auto/unix Fri Jul 07 13:40:23 2017 +0300 @@ -331,6 +331,16 @@ ngx_feature_test="setsockopt(0, SOL_SOCKET, SO_REUSEPORT, NULL, 0)" . auto/feature +ngx_feature="SO_COOKIE" +ngx_feature_name="NGX_HAVE_SOCKET_COOKIE" +ngx_feature_run=no +ngx_feature_incs="#include <sys/socket.h>" +ngx_feature_path= +ngx_feature_libs= +ngx_feature_test="uint64_t cookie; + socklen_t cookie_len = sizeof(cookie); + getsockopt(0, SOL_SOCKET, SO_COOKIE, &cookie, &cookie_len)" +. auto/feature ngx_feature="SO_ACCEPTFILTER" ngx_feature_name="NGX_HAVE_DEFERRED_ACCEPT" diff -r 70e65bf8dfd7 -r 55b401978df2 src/http/ngx_http_variables.c --- a/src/http/ngx_http_variables.c Tue Jul 04 18:50:41 2017 +0300 +++ b/src/http/ngx_http_variables.c Fri Jul 07 13:40:23 2017 +0300 @@ -46,6 +46,10 @@ 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_SOCKET_COOKIE) +static ngx_int_t ngx_http_variable_socket_cookie(ngx_http_request_t *r, + ngx_http_variable_value_t *v, uintptr_t data); +#endif #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); @@ -346,7 +350,10 @@ { ngx_string("time_local"), NULL, ngx_http_variable_time_local, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, - +#if (NGX_HAVE_SOCKET_COOKIE) + { ngx_string("socket_cookie"), NULL, ngx_http_variable_socket_cookie, + 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, +#endif #if (NGX_HAVE_TCP_INFO) { ngx_string("tcpinfo_rtt"), NULL, ngx_http_variable_tcpinfo, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, @@ -1098,6 +1105,28 @@ return NGX_OK; } +#if (NGX_HAVE_SOCKET_COOKIE) +static ngx_int_t +ngx_http_variable_socket_cookie(ngx_http_request_t *r, ngx_http_variable_value_t *v, + uintptr_t data) +{ + uint64_t cookie; + socklen_t cookie_len = sizeof(cookie);; + + if (getsockopt(0, SOL_SOCKET, SO_COOKIE, &cookie, &cookie_len) == -1) { + v->not_found = 1; + return NGX_OK; + } + + v->data = cookie; + v->len = cookie_len; + v->valid = 1; + v->no_cacheable = 0; + v->not_found = 0; + + return NGX_OK; +} +#endif #if (NGX_HAVE_TCP_INFO) -- Donatas _______________________________________________ nginx-devel mailing list nginx-devel@nginx.org http://mailman.nginx.org/mailman/listinfo/nginx-devel
