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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/1.0 200 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 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_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_proxy_connect_loc_conf_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;
ngx_flag_t connected;
};
typedef struct {
ngx_http_proxy_connect_upstream_t *u;
ngx_flag_t send_established;
ngx_flag_t send_established_done;
ngx_buf_t buf;
} ngx_http_proxy_connect_ctx_t;
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_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_null_command
};
static ngx_http_module_t ngx_http_proxy_connect_module_ctx = {
NULL, /* preconfiguration */
NULL, /* 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_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,
"kevent() reported that connect() failed");
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(proxy_connect)";
(void) ngx_connection_error(c, err, "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,
"finalize proxy_conncet 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,
"close proxy_connect 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;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"proxy_connect send 200 connection estatbilshed");
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
u = ctx->u;
b = &ctx->buf;
ctx->send_established = 1;
u->connected = 1;
for (;;) {
n = c->send(c, b->pos, b->last - b->pos);
if (n >= 0) {
b->pos += n;
if (b->pos == b->last) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
"proxy_connect sent 200 connection estatbilshed");
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, clcf->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_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http proxy_connect, fu:%ui", from_upstream);
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;
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,
"http proxy_connect 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, u->conf->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, u->conf->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_connection_error(r->connection, NGX_ETIMEDOUT, "client 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_connection_error(r->connection, NGX_ETIMEDOUT, "client 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_connection_error(c, NGX_ETIMEDOUT, "upstream timed out");
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_connection_error(c, NGX_ETIMEDOUT,
"upstream timed out(proxy_connect)");
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);
}
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 estatbilshed handler");
if (c->write->timedout) {
c->timedout = 1;
ngx_connection_error(c, NGX_ETIMEDOUT,
"client timed out(proxy_connect)");
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;
ngx_http_request_t *r;
ngx_http_log_ctx_t *lctx;
ngx_http_proxy_connect_upstream_t *u;
c = ev->data;
u = c->data;
r = u->request;
c = r->connection;
lctx = c->log->data;
lctx->current_request = r;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http proxy_connect upstream handler: \"%V:%V\"",
&r->connect_host, &r->connect_port);
if (ev->write) {
u->write_event_handler(r, u);
} else {
u->read_event_handler(r, u);
}
ngx_http_run_posted_requests(c);
}
static void
ngx_http_proxy_connect_process_connect(ngx_http_request_t *r,
ngx_http_proxy_connect_upstream_t *u)
{
ngx_int_t rc;
ngx_connection_t *c;
ngx_peer_connection_t *pc;
ngx_http_upstream_resolved_t *ur;
r->connection->log->action = "connecting to upstream(proxy_connect)";
pc = &u->peer;
ur = u->resolved;
pc->sockaddr = ur->sockaddr;
pc->socklen = ur->socklen;
pc->name = &ur->host;
pc->get = ngx_http_proxy_connect_get_peer;
rc = ngx_event_connect_peer(&u->peer);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"proxy_connect upstream connect: %i", rc);
if (rc == NGX_ERROR) {
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
if (rc == NGX_BUSY) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live connection");
ngx_http_proxy_connect_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY);
return;
}
if (rc == NGX_DECLINED) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "connection error");
ngx_http_proxy_connect_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY);
return;
}
/* rc == NGX_OK || rc == NGX_AGAIN || rc == NGX_DONE */
c = pc->connection;
c->data = u;
c->write->handler = ngx_http_proxy_connect_upstream_handler;
c->read->handler = ngx_http_proxy_connect_upstream_handler;
u->write_event_handler = ngx_http_proxy_connect_write_upstream;
u->read_event_handler = ngx_http_proxy_connect_read_upstream;
c->sendfile &= r->connection->sendfile;
c->log = r->connection->log;
if (c->pool == NULL) {
c->pool = ngx_create_pool(128, r->connection->log);
if (c->pool == NULL) {
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
}
c->pool->log = c->log;
c->read->log = c->log;
c->write->log = c->log;
if (rc == NGX_AGAIN) {
ngx_add_timer(c->write, u->conf->connect_timeout);
return;
}
ngx_http_proxy_connect_send_connection_established(r);
}
static void
ngx_http_proxy_connect_resolve_handler(ngx_resolver_ctx_t *ctx)
{
u_char *p;
ngx_int_t i, len;
ngx_connection_t *c;
#if defined(nginx_version) && nginx_version >= 1005008
socklen_t socklen;
struct sockaddr *sockaddr;
#else
struct sockaddr_in *sin;
#endif
ngx_http_request_t *r;
ngx_http_upstream_resolved_t *ur;
ngx_http_proxy_connect_upstream_t *u;
u = ctx->data;
r = u->request;
ur = u->resolved;
c = r->connection;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"proxy_connect resolve handler");
if (ctx->state) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"%V could not be resolved (%i: %s)",
&ctx->name, ctx->state,
ngx_resolver_strerror(ctx->state));
ngx_http_proxy_connect_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY);
goto failed;
}
ur->naddrs = ctx->naddrs;
ur->addrs = ctx->addrs;
#if (NGX_DEBUG)
{
# if defined(nginx_version) && nginx_version >= 1005008
u_char text[NGX_SOCKADDR_STRLEN];
ngx_str_t addr;
# else
in_addr_t addr;
# endif
ngx_uint_t i;
# if defined(nginx_version) && nginx_version >= 1005008
addr.data = text;
for (i = 0; i < ctx->naddrs; i++) {
addr.len = ngx_sock_ntop(ur->addrs[i].sockaddr, ur->addrs[i].socklen,
text, NGX_SOCKADDR_STRLEN, 0);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"name was resolved to %V", &addr);
}
# else
for (i = 0; i < ctx->naddrs; i++) {
addr = ntohl(ctx->addrs[i]);
ngx_log_debug4(NGX_LOG_DEBUG_HTTP, c->log, 0,
"name was resolved to %ud.%ud.%ud.%ud",
(addr >> 24) & 0xff, (addr >> 16) & 0xff,
(addr >> 8) & 0xff, addr & 0xff);
}
# endif
}
#endif
if (ur->naddrs == 0) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"%V could not be resolved", &ctx->name);
ngx_http_proxy_connect_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY);
goto failed;
}
if (ur->naddrs == 1) {
i = 0;
} else {
i = ngx_random() % ur->naddrs;
}
#if defined(nginx_version) && nginx_version >= 1005008
socklen = ur->addrs[i].socklen;
sockaddr = ngx_palloc(r->pool, socklen);
if (sockaddr == NULL) {
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
ngx_memcpy(sockaddr, ur->addrs[i].sockaddr, socklen);
switch (sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
((struct sockaddr_in6 *) sockaddr)->sin6_port = htons(ur->port);
break;
#endif
default: /* AF_INET */
((struct sockaddr_in *) sockaddr)->sin_port = htons(ur->port);
}
p = ngx_pnalloc(r->pool, NGX_SOCKADDR_STRLEN);
if (p == NULL) {
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
len = ngx_sock_ntop(sockaddr, socklen, p, NGX_SOCKADDR_STRLEN, 1);
ur->sockaddr = sockaddr;
ur->socklen = socklen;
#else
/* for nginx older than 1.5.8 */
len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1;
p = ngx_pnalloc(r->pool, len + sizeof(struct sockaddr_in));
if (p == NULL) {
ngx_http_proxy_connect_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
sin = (struct sockaddr_in *) &p[len];
ngx_memzero(sin, sizeof(struct sockaddr_in));
len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN);
len = ngx_sprintf(&p[len], ":%d", ur->port) - p;
sin->sin_family = AF_INET;
sin->sin_port = htons(ur->port);
sin->sin_addr.s_addr = ur->addrs[i];
ur->sockaddr = (struct sockaddr *) sin;
ur->socklen = sizeof(struct sockaddr_in);
#endif
ur->host.data = p;
ur->host.len = len;
ur->naddrs = 1;
ngx_resolve_name_done(ctx);
ur->ctx = NULL;
ngx_http_proxy_connect_process_connect(r, u);
failed:
ngx_http_run_posted_requests(c);
}
static ngx_int_t
ngx_http_proxy_connect_upstream_create(ngx_http_request_t *r,
ngx_http_proxy_connect_ctx_t *ctx)
{
ngx_http_proxy_connect_upstream_t *u;
u = ngx_pcalloc(r->pool, sizeof(ngx_http_proxy_connect_upstream_t));
if (u == NULL) {
return NGX_ERROR;
}
ctx->u = u;