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ngx_http_proxy_connect_module.c
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ngx_http_proxy_connect_module.c
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/*
* Copyright (C) 2010-2013 Alibaba Group Holding Limited
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <nginx.h>
#define NGX_HTTP_PROXY_CONNECT_ESTABLISTHED \
"HTTP/1.1 200 Connection Established\r\n" \
"Proxy-agent: nginx\r\n\r\n"
typedef struct ngx_http_proxy_connect_upstream_s
ngx_http_proxy_connect_upstream_t;
typedef struct ngx_http_proxy_connect_address_s
ngx_http_proxy_connect_address_t;
typedef void (*ngx_http_proxy_connect_upstream_handler_pt)(
ngx_http_request_t *r, ngx_http_proxy_connect_upstream_t *u);
typedef struct {
ngx_flag_t accept_connect;
ngx_flag_t allow_port_all;
ngx_array_t *allow_ports;
ngx_msec_t read_timeout;
ngx_msec_t send_timeout;
ngx_msec_t connect_timeout;
size_t send_lowat;
size_t buffer_size;
ngx_http_complex_value_t *address;
ngx_http_proxy_connect_address_t *local;
ngx_http_complex_value_t *response;
} ngx_http_proxy_connect_loc_conf_t;
typedef struct {
ngx_msec_t resolve_time;
ngx_msec_t connect_time;
ngx_msec_t first_byte_time;
/* TODO:
off_t bytes_received;
off_t bytes_sent;
*/
} ngx_http_proxy_connect_upstream_state_t;
struct ngx_http_proxy_connect_upstream_s {
ngx_http_proxy_connect_loc_conf_t *conf;
ngx_http_proxy_connect_upstream_handler_pt read_event_handler;
ngx_http_proxy_connect_upstream_handler_pt write_event_handler;
ngx_peer_connection_t peer;
ngx_http_request_t *request;
ngx_http_upstream_resolved_t *resolved;
ngx_buf_t from_client;
ngx_output_chain_ctx_t output;
ngx_buf_t buffer;
/* 1: DNS resolving succeeded */
ngx_flag_t _resolved;
/* 1: connection established */
ngx_flag_t connected;
ngx_msec_t start_time;
ngx_http_proxy_connect_upstream_state_t state;
};
struct ngx_http_proxy_connect_address_s {
ngx_addr_t *addr;
ngx_http_complex_value_t *value;
#if (NGX_HAVE_TRANSPARENT_PROXY)
ngx_uint_t transparent; /* unsigned transparent:1; */
#endif
};
typedef struct {
ngx_http_proxy_connect_upstream_t *u;
ngx_flag_t send_established;
ngx_flag_t send_established_done;
ngx_buf_t buf; /* CONNECT response */
ngx_msec_t connect_timeout;
ngx_msec_t send_timeout;
ngx_msec_t read_timeout;
} ngx_http_proxy_connect_ctx_t;
static ngx_int_t ngx_http_proxy_connect_init(ngx_conf_t *cf);
static ngx_int_t ngx_http_proxy_connect_add_variables(ngx_conf_t *cf);
static ngx_int_t ngx_http_proxy_connect_connect_addr_variable(
ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data);
static char *ngx_http_proxy_connect(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_http_proxy_connect_allow(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static void *ngx_http_proxy_connect_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_proxy_connect_merge_loc_conf(ngx_conf_t *cf, void *parent,
void *child);
static void ngx_http_proxy_connect_write_downstream(ngx_http_request_t *r);
static void ngx_http_proxy_connect_read_downstream(ngx_http_request_t *r);
static void ngx_http_proxy_connect_send_handler(ngx_http_request_t *r);
static ngx_int_t ngx_http_proxy_connect_allow_handler(ngx_http_request_t *r,
ngx_http_proxy_connect_loc_conf_t *plcf);
static char* ngx_http_proxy_connect_bind(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_int_t ngx_http_proxy_connect_set_local(ngx_http_request_t *r,
ngx_http_proxy_connect_upstream_t *u, ngx_http_proxy_connect_address_t *local);
static ngx_int_t ngx_http_proxy_connect_variable_get_time(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static void ngx_http_proxy_connect_variable_set_time(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_proxy_connect_resolve_time_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_proxy_connect_connect_time_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_proxy_connect_first_byte_time_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_proxy_connect_variable_get_response(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static void ngx_http_proxy_connect_variable_set_response(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_proxy_connect_sock_ntop(ngx_http_request_t *r,
ngx_http_proxy_connect_upstream_t *u);
static ngx_int_t ngx_http_proxy_connect_create_peer(ngx_http_request_t *r,
ngx_http_upstream_resolved_t *ur);
static ngx_command_t ngx_http_proxy_connect_commands[] = {
{ ngx_string("proxy_connect"),
NGX_HTTP_SRV_CONF|NGX_CONF_NOARGS,
ngx_http_proxy_connect,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_connect_loc_conf_t, accept_connect),
NULL },
{ ngx_string("proxy_connect_allow"),
NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
ngx_http_proxy_connect_allow,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
{ ngx_string("proxy_connect_read_timeout"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_connect_loc_conf_t, read_timeout),
NULL },
{ ngx_string("proxy_connect_send_timeout"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_connect_loc_conf_t, send_timeout),
NULL },
{ ngx_string("proxy_connect_connect_timeout"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_connect_loc_conf_t, connect_timeout),
NULL },
{ ngx_string("proxy_connect_send_lowat"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_connect_loc_conf_t, send_lowat),
NULL },
{ ngx_string("proxy_connect_address"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_http_set_complex_value_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_connect_loc_conf_t, address),
NULL },
{ ngx_string("proxy_connect_bind"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE12,
ngx_http_proxy_connect_bind,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_connect_loc_conf_t, local),
NULL },
{ ngx_string("proxy_connect_response"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_http_set_complex_value_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_connect_loc_conf_t, response),
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_proxy_connect_module_ctx = {
ngx_http_proxy_connect_add_variables, /* preconfiguration */
ngx_http_proxy_connect_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_proxy_connect_create_loc_conf, /* create location configuration */
ngx_http_proxy_connect_merge_loc_conf /* merge location configuration */
};
ngx_module_t ngx_http_proxy_connect_module = {
NGX_MODULE_V1,
&ngx_http_proxy_connect_module_ctx, /* module context */
ngx_http_proxy_connect_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static ngx_http_variable_t ngx_http_proxy_connect_vars[] = {
{ ngx_string("connect_addr"), NULL,
ngx_http_proxy_connect_connect_addr_variable,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("proxy_connect_connect_timeout"),
ngx_http_proxy_connect_variable_set_time,
ngx_http_proxy_connect_variable_get_time,
offsetof(ngx_http_proxy_connect_ctx_t, connect_timeout),
NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_CHANGEABLE, 0 },
{ ngx_string("proxy_connect_read_timeout"),
ngx_http_proxy_connect_variable_set_time,
ngx_http_proxy_connect_variable_get_time,
offsetof(ngx_http_proxy_connect_ctx_t, read_timeout),
NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_CHANGEABLE, 0 },
{ ngx_string("proxy_connect_send_timeout"),
ngx_http_proxy_connect_variable_set_time,
ngx_http_proxy_connect_variable_get_time,
offsetof(ngx_http_proxy_connect_ctx_t, send_timeout),
NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_CHANGEABLE, 0 },
{ ngx_string("proxy_connect_resolve_time"), NULL,
ngx_http_proxy_connect_resolve_time_variable, 0,
NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("proxy_connect_connect_time"), NULL,
ngx_http_proxy_connect_connect_time_variable, 0,
NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("proxy_connect_first_byte_time"), NULL,
ngx_http_proxy_connect_first_byte_time_variable, 0,
NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("proxy_connect_response"),
ngx_http_proxy_connect_variable_set_response,
ngx_http_proxy_connect_variable_get_response,
offsetof(ngx_http_proxy_connect_ctx_t, buf),
NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_CHANGEABLE, 0 },
{ ngx_null_string, NULL, NULL, 0, 0, 0 }
};
#if 1
#if defined(nginx_version) && nginx_version >= 1005008
#define __ngx_sock_ntop ngx_sock_ntop
#else
#define __ngx_sock_ntop(sa, slen, p, len, port) ngx_sock_ntop(sa, p, len, port)
#endif
/*
* #if defined(nginx_version) && nginx_version <= 1009015
*
* from src/core/ngx_inet.c: ngx_inet_set_port & ngx_parse_addr_port
*
* redefined to __ngx_inet_set_port & __ngx_parse_addr_port to
* avoid too many `#if nginx_version > ...` macro
*/
static void
__ngx_inet_set_port(struct sockaddr *sa, in_port_t port)
{
struct sockaddr_in *sin;
#if (NGX_HAVE_INET6)
struct sockaddr_in6 *sin6;
#endif
switch (sa->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
sin6 = (struct sockaddr_in6 *) sa;
sin6->sin6_port = htons(port);
break;
#endif
#if (NGX_HAVE_UNIX_DOMAIN)
case AF_UNIX:
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) sa;
sin->sin_port = htons(port);
break;
}
}
static ngx_int_t
__ngx_parse_addr_port(ngx_pool_t *pool, ngx_addr_t *addr, u_char *text,
size_t len)
{
u_char *p, *last;
size_t plen;
ngx_int_t rc, port;
rc = ngx_parse_addr(pool, addr, text, len);
if (rc != NGX_DECLINED) {
return rc;
}
last = text + len;
#if (NGX_HAVE_INET6)
if (len && text[0] == '[') {
p = ngx_strlchr(text, last, ']');
if (p == NULL || p == last - 1 || *++p != ':') {
return NGX_DECLINED;
}
text++;
len -= 2;
} else
#endif
{
p = ngx_strlchr(text, last, ':');
if (p == NULL) {
return NGX_DECLINED;
}
}
p++;
plen = last - p;
port = ngx_atoi(p, plen);
if (port < 1 || port > 65535) {
return NGX_DECLINED;
}
len -= plen + 1;
rc = ngx_parse_addr(pool, addr, text, len);
if (rc != NGX_OK) {
return rc;
}
__ngx_inet_set_port(addr->sockaddr, (in_port_t) port);
return NGX_OK;
}
#endif
static ngx_int_t
ngx_http_proxy_connect_get_peer(ngx_peer_connection_t *pc, void *data)
{
return NGX_OK;
}
static ngx_int_t
ngx_http_proxy_connect_test_connect(ngx_connection_t *c)
{
int err;
socklen_t len;
#if (NGX_HAVE_KQUEUE)
if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
if (c->write->pending_eof || c->read->pending_eof) {
if (c->write->pending_eof) {
err = c->write->kq_errno;
} else {
err = c->read->kq_errno;
}
c->log->action = "connecting to upstream";
(void) ngx_connection_error(c, err,
"proxy_connet: upstream connect failed (kevent)");
return NGX_ERROR;
}
} else
#endif
{
err = 0;
len = sizeof(int);
/*
* BSDs and Linux return 0 and set a pending error in err
* Solaris returns -1 and sets errno
*/
if (getsockopt(c->fd, SOL_SOCKET, SO_ERROR, (void *) &err, &len)
== -1)
{
err = ngx_errno;
}
if (err) {
c->log->action = "connecting to upstream";
(void) ngx_connection_error(c, err,
"proxy_connect: upstream connect failed");
return NGX_ERROR;
}
}
return NGX_OK;
}
static void
ngx_http_proxy_connect_finalize_request(ngx_http_request_t *r,
ngx_http_proxy_connect_upstream_t *u, ngx_int_t rc)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"proxy_connect: finalize upstream request: %i", rc);
r->keepalive = 0;
if (u->resolved && u->resolved->ctx) {
ngx_resolve_name_done(u->resolved->ctx);
u->resolved->ctx = NULL;
}
if (u->peer.free && u->peer.sockaddr) {
u->peer.free(&u->peer, u->peer.data, 0);
u->peer.sockaddr = NULL;
}
if (u->peer.connection) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"proxy_connect: close upstream connection: %d",
u->peer.connection->fd);
if (u->peer.connection->pool) {
ngx_destroy_pool(u->peer.connection->pool);
}
ngx_close_connection(u->peer.connection);
}
u->peer.connection = NULL;
if (rc == NGX_DECLINED) {
return;
}
r->connection->log->action = "sending to client";
if (rc == NGX_HTTP_REQUEST_TIME_OUT
|| rc == NGX_HTTP_CLIENT_CLOSED_REQUEST)
{
ngx_http_finalize_request(r, rc);
return;
}
if (u->connected && rc >= NGX_HTTP_SPECIAL_RESPONSE) {
rc = NGX_ERROR;
}
ngx_http_finalize_request(r, rc);
}
static void
ngx_http_proxy_connect_send_connection_established(ngx_http_request_t *r)
{
ngx_int_t n;
ngx_buf_t *b;
ngx_connection_t *c;
ngx_http_core_loc_conf_t *clcf;
ngx_http_proxy_connect_upstream_t *u;
ngx_http_proxy_connect_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_connect_module);
c = r->connection;
u = ctx->u;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"proxy_connect: send 200 connection established");
u->connected = 1;
if (u->state.connect_time == (ngx_msec_t) -1) {
u->state.connect_time = ngx_current_msec - u->start_time;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
b = &ctx->buf;
/* modify CONNECT response via proxy_connect_response directive */
{
ngx_str_t resp;
ngx_http_proxy_connect_loc_conf_t *plcf;
plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_connect_module);
if (plcf->response
&& ngx_http_complex_value(r, plcf->response, &resp) == NGX_OK)
{
if (resp.len > 0) {
b->pos = resp.data;
b->last = b->pos + resp.len;
}
}
}
ctx->send_established = 1;
for (;;) {
n = c->send(c, b->pos, b->last - b->pos);
if (n >= 0) {
r->headers_out.status = 200; /* fixed that $status is 000 */
b->pos += n;
if (b->pos == b->last) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"proxy_connect: sent 200 connection established");
if (c->write->timer_set) {
ngx_del_timer(c->write);
}
ctx->send_established_done = 1;
r->write_event_handler =
ngx_http_proxy_connect_write_downstream;
r->read_event_handler = ngx_http_proxy_connect_read_downstream;
if (ngx_handle_write_event(c->write, clcf->send_lowat)
!= NGX_OK)
{
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
if (r->header_in->last > r->header_in->pos || c->read->ready) {
r->read_event_handler(r);
return;
}
return;
}
/* keep sending more data */
continue;
}
/* NGX_ERROR || NGX_AGAIN */
break;
}
if (n == NGX_ERROR) {
ngx_http_proxy_connect_finalize_request(r, u, NGX_ERROR);
return;
}
/* n == NGX_AGAIN */
r->write_event_handler = ngx_http_proxy_connect_send_handler;
ngx_add_timer(c->write, ctx->send_timeout);
if (ngx_handle_write_event(c->write, clcf->send_lowat) != NGX_OK) {
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
return;
}
static void
ngx_http_proxy_connect_tunnel(ngx_http_request_t *r,
ngx_uint_t from_upstream, ngx_uint_t do_write)
{
size_t size;
ssize_t n;
ngx_buf_t *b;
ngx_connection_t *c, *downstream, *upstream, *dst, *src;
ngx_http_core_loc_conf_t *clcf;
ngx_http_proxy_connect_ctx_t *ctx;
ngx_http_proxy_connect_upstream_t *u;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_connect_module);
c = r->connection;
u = ctx->u;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
"proxy_connect: tunnel fu:%ui write:%ui",
from_upstream, do_write);
downstream = c;
upstream = u->peer.connection;
if (from_upstream) {
src = upstream;
dst = downstream;
b = &u->buffer;
} else {
src = downstream;
dst = upstream;
b = &u->from_client;
if (r->header_in->last > r->header_in->pos) {
b = r->header_in;
b->end = b->last;
do_write = 1;
}
if (b->start == NULL) {
b->start = ngx_palloc(r->pool, u->conf->buffer_size);
if (b->start == NULL) {
ngx_http_proxy_connect_finalize_request(r, u, NGX_ERROR);
return;
}
b->pos = b->start;
b->last = b->start;
b->end = b->start + u->conf->buffer_size;
b->temporary = 1;
}
}
for ( ;; ) {
if (do_write) {
size = b->last - b->pos;
if (size && dst->write->ready) {
n = dst->send(dst, b->pos, size);
if (n == NGX_AGAIN) {
break;
}
if (n == NGX_ERROR) {
ngx_http_proxy_connect_finalize_request(r, u, NGX_ERROR);
return;
}
if (n > 0) {
b->pos += n;
if (b->pos == b->last) {
b->pos = b->start;
b->last = b->start;
}
}
}
}
size = b->end - b->last;
if (size && src->read->ready) {
n = src->recv(src, b->last, size);
if (n == NGX_AGAIN || n == 0) {
break;
}
if (n > 0) {
do_write = 1;
b->last += n;
if (from_upstream) {
if (u->state.first_byte_time == (ngx_msec_t) -1) {
u->state.first_byte_time = ngx_current_msec
- u->start_time;
}
}
continue;
}
if (n == NGX_ERROR) {
src->read->eof = 1;
}
}
break;
}
if ((upstream->read->eof && u->buffer.pos == u->buffer.last)
|| (downstream->read->eof && u->from_client.pos == u->from_client.last)
|| (downstream->read->eof && upstream->read->eof))
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"proxy_connect: tunnel done");
ngx_http_proxy_connect_finalize_request(r, u, 0);
return;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (ngx_handle_write_event(upstream->write, u->conf->send_lowat)
!= NGX_OK)
{
ngx_http_proxy_connect_finalize_request(r, u, NGX_ERROR);
return;
}
if (upstream->write->active && !upstream->write->ready) {
ngx_add_timer(upstream->write, ctx->send_timeout);
} else if (upstream->write->timer_set) {
ngx_del_timer(upstream->write);
}
if (ngx_handle_read_event(upstream->read, 0) != NGX_OK) {
ngx_http_proxy_connect_finalize_request(r, u, NGX_ERROR);
return;
}
if (upstream->read->active && !upstream->read->ready) {
if (from_upstream) {
ngx_add_timer(upstream->read, ctx->read_timeout);
}
} else if (upstream->read->timer_set) {
ngx_del_timer(upstream->read);
}
if (ngx_handle_write_event(downstream->write, clcf->send_lowat)
!= NGX_OK)
{
ngx_http_proxy_connect_finalize_request(r, u, NGX_ERROR);
return;
}
if (ngx_handle_read_event(downstream->read, 0) != NGX_OK) {
ngx_http_proxy_connect_finalize_request(r, u, NGX_ERROR);
return;
}
if (downstream->write->active && !downstream->write->ready) {
ngx_add_timer(downstream->write, clcf->send_timeout);
} else if (downstream->write->timer_set) {
ngx_del_timer(downstream->write);
}
if (downstream->read->active && !downstream->read->ready) {
if (!from_upstream) {
ngx_add_timer(downstream->read, clcf->client_body_timeout);
}
} else if (downstream->read->timer_set) {
ngx_del_timer(downstream->read);
}
}
static void
ngx_http_proxy_connect_read_downstream(ngx_http_request_t *r)
{
ngx_http_proxy_connect_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_connect_module);
if (r->connection->read->timedout) {
r->connection->timedout = 1;
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"proxy_connect: client read timed out");
ngx_http_proxy_connect_finalize_request(r, ctx->u,
NGX_HTTP_REQUEST_TIME_OUT);
return;
}
ngx_http_proxy_connect_tunnel(r, 0, 0);
}
static void
ngx_http_proxy_connect_write_downstream(ngx_http_request_t *r)
{
ngx_http_proxy_connect_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_connect_module);
if (r->connection->write->timedout) {
r->connection->timedout = 1;
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"proxy_connect: client write timed out");
ngx_http_proxy_connect_finalize_request(r, ctx->u,
NGX_HTTP_REQUEST_TIME_OUT);
return;
}
ngx_http_proxy_connect_tunnel(r, 1, 1);
}
static void
ngx_http_proxy_connect_read_upstream(ngx_http_request_t *r,
ngx_http_proxy_connect_upstream_t *u)
{
ngx_connection_t *c;
ngx_http_proxy_connect_ctx_t *ctx;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"proxy_connect: upstream read handler");
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_connect_module);
c = u->peer.connection;
if (c->read->timedout) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"proxy_connect: upstream read timed out (peer:%V)",
u->peer.name);
ngx_http_proxy_connect_finalize_request(r, u, NGX_HTTP_GATEWAY_TIME_OUT);
return;
}
if (!ctx->send_established &&
ngx_http_proxy_connect_test_connect(c) != NGX_OK)
{
ngx_http_proxy_connect_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY);
return;
}
if (u->buffer.start == NULL) {
u->buffer.start = ngx_palloc(r->pool, u->conf->buffer_size);
if (u->buffer.start == NULL) {
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
u->buffer.pos = u->buffer.start;
u->buffer.last = u->buffer.start;
u->buffer.end = u->buffer.start + u->conf->buffer_size;
u->buffer.temporary = 1;
}
if (!ctx->send_established_done) {
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
return;
}
ngx_http_proxy_connect_tunnel(r, 1, 0);
}
static void
ngx_http_proxy_connect_write_upstream(ngx_http_request_t *r,
ngx_http_proxy_connect_upstream_t *u)
{
ngx_connection_t *c;
ngx_http_proxy_connect_ctx_t *ctx;
c = u->peer.connection;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"proxy_connect: upstream write handler");
if (c->write->timedout) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"proxy_connect: upstream %s timed out (peer:%V)",
u->connected ? "write" : "connect", u->peer.name);
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_GATEWAY_TIME_OUT);
return;
}
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_connect_module);
if (c->write->timer_set) {
ngx_del_timer(c->write);
}
if (!ctx->send_established &&
ngx_http_proxy_connect_test_connect(c) != NGX_OK)
{
ngx_http_proxy_connect_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY);
return;
}
if (!ctx->send_established) {
ngx_http_proxy_connect_send_connection_established(r);
return;
}
if (!ctx->send_established_done) {
if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
return;
}
ngx_http_proxy_connect_tunnel(r, 0, 1);
}
static void
ngx_http_proxy_connect_send_handler(ngx_http_request_t *r)
{
ngx_connection_t *c;
ngx_http_proxy_connect_ctx_t *ctx;
c = r->connection;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_connect_module);
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"proxy_connect: send connection established handler");
if (c->write->timedout) {
c->timedout = 1;
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"proxy_connect: client write timed out");
ngx_http_proxy_connect_finalize_request(r, ctx->u,
NGX_HTTP_REQUEST_TIME_OUT);
return;
}
if (ctx->buf.pos != ctx->buf.last) {
ngx_http_proxy_connect_send_connection_established(r);
}
}
static void
ngx_http_proxy_connect_upstream_handler(ngx_event_t *ev)
{
ngx_connection_t *c;