/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "private-lib-core.h"
#if !defined(LWS_WITH_SYS_ASYNC_DNS)
static int
lws_getaddrinfo46(struct lws *wsi, const char *ads, struct addrinfo **result)
{
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
*result = NULL;
hints.ai_socktype = SOCK_STREAM;
#ifdef LWS_WITH_IPV6
if (wsi->ipv6) {
#if !defined(__ANDROID__)
hints.ai_family = AF_UNSPEC;
hints.ai_flags = AI_V4MAPPED;
#endif
} else
#endif
{
hints.ai_family = PF_UNSPEC;
}
return getaddrinfo(ads, NULL, &hints, result);
}
#endif
struct lws *
lws_client_connect_4_established(struct lws *wsi, struct lws *wsi_piggyback,
ssize_t plen)
{
#if defined(LWS_CLIENT_HTTP_PROXYING)
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
#endif
const char *meth = NULL;
struct lws_pollfd pfd;
const char *cce = "";
int n, m, rawish = 0;
if (wsi->stash)
meth = wsi->stash->cis[CIS_METHOD];
else
meth = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_METHOD);
if (meth && !strcmp(meth, "RAW"))
rawish = 1;
if (wsi_piggyback)
goto send_hs;
#if defined(LWS_CLIENT_HTTP_PROXYING)
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
/* we are connected to server, or proxy */
/* http proxy */
if (wsi->vhost->http.http_proxy_port) {
const char *cpa;
if (wsi->stash)
cpa = wsi->stash->cis[CIS_ADDRESS];
else
cpa = lws_hdr_simple_ptr(wsi,
_WSI_TOKEN_CLIENT_PEER_ADDRESS);
lwsl_info("%s: going via proxy\n", __func__);
plen = lws_snprintf((char *)pt->serv_buf, 256,
"CONNECT %s:%u HTTP/1.1\x0d\x0a"
"Host: %s:%u\x0d\x0a"
"User-agent: lws\x0d\x0a", cpa, wsi->ocport,
cpa, wsi->ocport);
if (wsi->vhost->proxy_basic_auth_token[0])
plen += lws_snprintf((char *)pt->serv_buf + plen, 256,
"Proxy-authorization: basic %s\x0d\x0a",
wsi->vhost->proxy_basic_auth_token);
plen += lws_snprintf((char *)pt->serv_buf + plen, 5, "\x0d\x0a");
/* lwsl_hexdump_notice(pt->serv_buf, plen); */
/*
* OK from now on we talk via the proxy, so connect to that
*/
if (wsi->stash)
wsi->stash->cis[CIS_ADDRESS] =
wsi->vhost->http.http_proxy_address;
else
if (lws_hdr_simple_create(wsi,
_WSI_TOKEN_CLIENT_PEER_ADDRESS,
wsi->vhost->http.http_proxy_address))
goto failed;
wsi->c_port = wsi->vhost->http.http_proxy_port;
n = send(wsi->desc.sockfd, (char *)pt->serv_buf, (int)plen,
MSG_NOSIGNAL);
if (n < 0) {
lwsl_debug("ERROR writing to proxy socket\n");
cce = "proxy write failed";
goto failed;
}
lws_set_timeout(wsi, PENDING_TIMEOUT_AWAITING_PROXY_RESPONSE,
AWAITING_TIMEOUT);
lwsi_set_state(wsi, LRS_WAITING_PROXY_REPLY);
return wsi;
}
#endif
#endif
#if defined(LWS_WITH_SOCKS5)
/* socks proxy */
else if (wsi->vhost->socks_proxy_port) {
n = send(wsi->desc.sockfd, (char *)pt->serv_buf, plen,
MSG_NOSIGNAL);
if (n < 0) {
lwsl_debug("ERROR writing socks greeting\n");
cce = "socks write failed";
goto failed;
}
lws_set_timeout(wsi,
PENDING_TIMEOUT_AWAITING_SOCKS_GREETING_REPLY,
AWAITING_TIMEOUT);
lwsi_set_state(wsi, LRS_WAITING_SOCKS_GREETING_REPLY);
return wsi;
}
#endif
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
send_hs:
if (wsi_piggyback &&
!lws_dll2_is_detached(&wsi->dll2_cli_txn_queue)) {
/*
* We are pipelining on an already-established connection...
* we can skip tls establishment.
*/
lwsi_set_state(wsi, LRS_H1C_ISSUE_HANDSHAKE2);
/*
* we can't send our headers directly, because they have to
* be sent when the parent is writeable. The parent will check
* for anybody on his client transaction queue that is in
* LRS_H1C_ISSUE_HANDSHAKE2, and let them write.
*
* If we are trying to do this too early, before the master
* connection has written his own headers, then it will just
* wait in the queue until it's possible to send them.
*/
lws_callback_on_writable(wsi_piggyback);
#if defined(LWS_WITH_DETAILED_LATENCY)
wsi->detlat.earliest_write_req =
wsi->detlat.earliest_write_req_pre_write = lws_now_usecs();
#endif
lwsl_info("%s: wsi %p: waiting to send hdrs (par state 0x%x)\n",
__func__, wsi, lwsi_state(wsi_piggyback));
} else {
lwsl_info("%s: wsi %p: %s %s client created own conn (raw %d) vh %s\n",
__func__, wsi, wsi->role_ops->name,
wsi->protocol->name, rawish, wsi->vhost->name);
/* we are making our own connection */
if (!rawish)
lwsi_set_state(wsi, LRS_H1C_ISSUE_HANDSHAKE);
else {
/* for a method = "RAW" connection, this makes us
* established */
/* clear his established timeout */
lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
m = wsi->role_ops->adoption_cb[0];
if (m) {
n = user_callback_handle_rxflow(
wsi->protocol->callback, wsi,
m, wsi->user_space, NULL, 0);
if (n < 0) {
lwsl_info("LWS_CALLBACK_RAW_PROXY_CLI_ADOPT failed\n");
goto failed;
}
}
/* service.c pollout processing wants this */
wsi->hdr_parsing_completed = 1;
lwsl_info("%s: setting ESTABLISHED\n", __func__);
lwsi_set_state(wsi, LRS_ESTABLISHED);
return wsi;
}
/*
* provoke service to issue the handshake directly.
*
* we need to do it this way because in the proxy case, this is
* the next state and executed only if and when we get a good
* proxy response inside the state machine... but notice in
* SSL case this may not have sent anything yet with 0 return,
* and won't until many retries from main loop. To stop that
* becoming endless, cover with a timeout.
*/
lws_set_timeout(wsi, PENDING_TIMEOUT_SENT_CLIENT_HANDSHAKE,
AWAITING_TIMEOUT);
assert(lws_socket_is_valid(wsi->desc.sockfd));
pfd.fd = wsi->desc.sockfd;
pfd.events = LWS_POLLIN;
pfd.revents = LWS_POLLIN;
n = lws_service_fd(wsi->context, &pfd);
if (n < 0) {
cce = "first service failed";
goto failed;
}
if (n) /* returns 1 on failure after closing wsi */
return NULL;
}
#endif
return wsi;
failed:
lws_inform_client_conn_fail(wsi, (void *)cce, strlen(cce));
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS, "client_connect2");
return NULL;
}
struct lws *
lws_client_connect_3_connect(struct lws *wsi, const char *ads,
const struct addrinfo *result, int n, void *opaque)
{
#if defined(LWS_WITH_UNIX_SOCK)
struct sockaddr_un sau;
#endif
#ifdef LWS_WITH_IPV6
char ipv6only = lws_check_opt(wsi->vhost->options,
LWS_SERVER_OPTION_IPV6_V6ONLY_MODIFY |
LWS_SERVER_OPTION_IPV6_V6ONLY_VALUE);
#endif
const struct sockaddr *psa = NULL;
const char *cce = "", *iface;
ssize_t plen = 0;
lws_sockaddr46 sa46;
char ni[48];
int m;
#if defined(LWS_WITH_IPV6) && defined(__ANDROID__)
ipv6only = 0;
#endif
/*
* async dns calls back here for everybody who cares when it gets a
* result... but if we are piggybacking, we do not want to connect
* ourselves
*/
if (!lws_dll2_is_detached(&wsi->dll2_cli_txn_queue))
return wsi;
#if 0
if (!ads && !result) {
cce = "dns resolution failed";
if (!wsi->oom4)
goto oom4;
else
goto failed;
}
#endif
/*
* We can check using getsockopt if our connect actually completed
*/
if (lwsi_state(wsi) == LRS_WAITING_CONNECT &&
lws_socket_is_valid(wsi->desc.sockfd)) {
socklen_t sl = sizeof(int);
int e = 0;
/*
* this resets SO_ERROR after reading it. If there's an error
* condition the connect definitively failed.
*/
if (!getsockopt(wsi->desc.sockfd, SOL_SOCKET, SO_ERROR,
&e, &sl)) {
if (!e) {
lwsl_info("%s: getsockopt check: conn OK\n",
__func__);
goto conn_good;
}
lwsl_debug("%s: getsockopt fd %d says err %d\n", __func__,
wsi->desc.sockfd, e);
}
lwsl_debug("%s: getsockopt check: conn fail: errno %d\n",
__func__, LWS_ERRNO);
goto try_next_result_fds;
}
#if defined(LWS_WITH_UNIX_SOCK)
if (ads && *ads == '+') {
ads++;
memset(&sa46, 0, sizeof(sa46));
memset(&sau, 0, sizeof(sau));
sau.sun_family = AF_UNIX;
strncpy(sau.sun_path, ads, sizeof(sau.sun_path));
sau.sun_path[sizeof(sau.sun_path) - 1] = '\0';
lwsl_info("%s: Unix skt: %s\n", __func__, ads);
if (sau.sun_path[0] == '@')
sau.sun_path[0] = '\0';
goto ads_known;
}
#endif
#if defined(LWS_WITH_SYS_ASYNC_DNS)
if (n == LADNS_RET_FAILED) {
lwsl_notice("%s: adns failed %s\n", __func__, ads);
goto oom4;
}
#endif
if (!wsi->dns_results) {
wsi->dns_results_next = wsi->dns_results = result;
if (result)
lwsl_debug("%s: result %p result->ai_next %p\n",
__func__, result, result->ai_next);
}
#if defined(LWS_WITH_DETAILED_LATENCY)
if (lwsi_state(wsi) == LRS_WAITING_DNS &&
wsi->context->detailed_latency_cb) {
wsi->detlat.type = LDLT_NAME_RESOLUTION;
wsi->detlat.latencies[LAT_DUR_PROXY_CLIENT_REQ_TO_WRITE] =
lws_now_usecs() -
wsi->detlat.earliest_write_req_pre_write;
wsi->detlat.latencies[LAT_DUR_USERCB] = 0;
lws_det_lat_cb(wsi->context, &wsi->detlat);
wsi->detlat.earliest_write_req_pre_write = lws_now_usecs();
}
#endif
#if defined(LWS_CLIENT_HTTP_PROXYING) && \
(defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2))
/* Decide what it is we need to connect to:
*
* Priority 1: connect to http proxy */
if (wsi->vhost->http.http_proxy_port) {
ads = wsi->vhost->http.http_proxy_address;
wsi->c_port = wsi->vhost->http.http_proxy_port;
#else
if (0) {
#endif
#if defined(LWS_WITH_SOCKS5)
/* Priority 2: Connect to SOCK5 Proxy */
} else if (wsi->vhost->socks_proxy_port) {
if (socks_generate_msg(wsi, SOCKS_MSG_GREETING, &plen)) {
cce = "socks msg too large";
goto oom4;
}
lwsl_client("Sending SOCKS Greeting\n");
ads = wsi->vhost->socks_proxy_address;
wsi->c_port = wsi->vhost->socks_proxy_port;
#endif
}
memset(&sa46, 0, sizeof(sa46));
if (n || !wsi->dns_results) {
/* lws_getaddrinfo46 failed, there is no usable result */
lwsl_notice("%s: lws_getaddrinfo46 failed %d\n",
__func__, n);
cce = "ipv6 lws_getaddrinfo46 failed";
goto oom4;
}
/*
* Let's try connecting to each of the results in turn until one works
* or we run out of results
*/
next_result:
psa = (const struct sockaddr *)&sa46;
n = sizeof(sa46);
memset(&sa46, 0, sizeof(sa46));
switch (wsi->dns_results_next->ai_family) {
case AF_INET:
#if defined(LWS_WITH_IPV6)
if (ipv6only) {
sa46.sa4.sin_family = AF_INET6;
/* map IPv4 to IPv6 */
memset((char *)&sa46.sa6.sin6_addr, 0,
sizeof(sa46.sa6.sin6_addr));
sa46.sa6.sin6_addr.s6_addr[10] = 0xff;
sa46.sa6.sin6_addr.s6_addr[11] = 0xff;
memcpy(&sa46.sa6.sin6_addr.s6_addr[12],
&((struct sockaddr_in *)
wsi->dns_results_next->ai_addr)->sin_addr,
sizeof(struct in_addr));
sa46.sa6.sin6_port = htons(wsi->c_port);
ni[0] = '\0';
lws_write_numeric_address(sa46.sa6.sin6_addr.s6_addr,
16, ni, sizeof(ni));
lwsl_info("%s: %s ipv4->ipv6 %s\n", __func__, ads, ni);
break;
}
#endif
sa46.sa4.sin_family = AF_INET;
sa46.sa4.sin_addr.s_addr =
((struct sockaddr_in *)wsi->dns_results_next->ai_addr)->
sin_addr.s_addr;
memset(&sa46.sa4.sin_zero, 0, sizeof(sa46.sa4.sin_zero));
sa46.sa4.sin_port = htons(wsi->c_port);
n = sizeof(struct sockaddr_in);
lws_write_numeric_address((uint8_t *)&sa46.sa4.sin_addr.s_addr,
4, ni, sizeof(ni));
lwsl_info("%s: %s ipv4 %s\n", __func__, ads, ni);
break;
case AF_INET6:
#if defined(LWS_WITH_IPV6)
if (!wsi->ipv6)
goto try_next_result;
sa46.sa4.sin_family = AF_INET6;
memcpy(&sa46.sa6.sin6_addr,
&((struct sockaddr_in6 *)wsi->dns_results_next->ai_addr)->
sin6_addr, sizeof(struct in6_addr));
sa46.sa6.sin6_scope_id = ((struct sockaddr_in6 *)
wsi->dns_results_next->ai_addr)->sin6_scope_id;
sa46.sa6.sin6_flowinfo = ((struct sockaddr_in6 *)
wsi->dns_results_next->ai_addr)->sin6_flowinfo;
sa46.sa6.sin6_port = htons(wsi->c_port);
lws_write_numeric_address((uint8_t *)&sa46.sa6.sin6_addr,
16, ni, sizeof(ni));
lwsl_info("%s: %s ipv6 %s\n", __func__, ads, ni);
#else
goto try_next_result; /* ipv4 only can't use this */
#endif
break;
}
#if defined(LWS_WITH_UNIX_SOCK)
ads_known:
#endif
/* now we decided on ipv4 or ipv6, set the port and create socket*/
if (!lws_socket_is_valid(wsi->desc.sockfd)) {
if (wsi->context->event_loop_ops->check_client_connect_ok &&
wsi->context->event_loop_ops->check_client_connect_ok(wsi)) {
cce = "waiting for event loop watcher to close";
goto oom4;
}
#if defined(LWS_WITH_UNIX_SOCK)
if (wsi->unix_skt)
wsi->desc.sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
else
#endif
wsi->desc.sockfd = socket(sa46.sa4.sin_family,
SOCK_STREAM, 0);
if (!lws_socket_is_valid(wsi->desc.sockfd)) {
lwsl_warn("Unable to open socket\n");
goto try_next_result;
}
if (lws_plat_set_socket_options(wsi->vhost, wsi->desc.sockfd,
#if defined(LWS_WITH_UNIX_SOCK)
wsi->unix_skt)) {
#else
0)) {
#endif
lwsl_err("Failed to set wsi socket options\n");
goto try_next_result_closesock;
}
lwsl_debug("%s: %p: WAITING_CONNECT\n", __func__, wsi);
lwsi_set_state(wsi, LRS_WAITING_CONNECT);
#if !defined(LWS_AMAZON_RTOS)
if (wsi->context->event_loop_ops->accept)
if (wsi->context->event_loop_ops->accept(wsi))
goto try_next_result_closesock;
#endif
if (__insert_wsi_socket_into_fds(wsi->context, wsi))
goto try_next_result_closesock;
if (lws_change_pollfd(wsi, 0, LWS_POLLIN))
goto try_next_result_fds;
/*
* Past here, we can't simply free the structs as error
* handling as oom4 does.
*
* We can run the whole close flow, or unpick the fds inclusion
* and anything else we have done.
*/
wsi->oom4 = 1;
if (!wsi->protocol)
wsi->protocol = &wsi->vhost->protocols[0];
lws_set_timeout(wsi, PENDING_TIMEOUT_AWAITING_CONNECT_RESPONSE,
AWAITING_TIMEOUT);
if (wsi->stash)
iface = wsi->stash->cis[CIS_IFACE];
else
iface = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_IFACE);
if (iface && *iface) {
n = lws_socket_bind(wsi->vhost, wsi->desc.sockfd, 0,
iface, wsi->ipv6);
if (n < 0)
goto try_next_result_fds;
}
}
#if defined(LWS_WITH_UNIX_SOCK)
if (wsi->unix_skt) {
psa = (const struct sockaddr *)&sau;
n = sizeof(sau);
} else
#endif
if (!psa) /* coverity */
goto try_next_result_fds;
/*
* The actual connection attempt
*/
#if defined(LWS_WITH_DETAILED_LATENCY)
wsi->detlat.earliest_write_req =
wsi->detlat.earliest_write_req_pre_write = lws_now_usecs();
#endif
m = connect(wsi->desc.sockfd, (const struct sockaddr *)psa, n);
if (m == -1) {
int errno_copy = LWS_ERRNO;
lwsl_debug("%s: connect says errno: %d\n", __func__, errno_copy);
if (errno_copy != LWS_EALREADY &&
errno_copy != LWS_EINPROGRESS &&
errno_copy != LWS_EWOULDBLOCK
#ifdef _WIN32
&& errno_copy != WSAEINVAL
#endif
) {
#if defined(_DEBUG)
char nads[48];
lws_sa46_write_numeric_address(&sa46, nads, sizeof(nads));
lwsl_info("%s: Connect failed: %s port %d\n",
__func__, nads, wsi->c_port);
#endif
goto try_next_result_fds;
}
if (lws_plat_check_connection_error(wsi))
goto try_next_result_fds;
/*
* must do specifically a POLLOUT poll to hear
* about the connect completion
*/
if (lws_change_pollfd(wsi, 0, LWS_POLLOUT))
goto try_next_result_fds;
return wsi;
}
conn_good:
lwsl_debug("%s: Connection started\n", __func__);
/* the tcp connection has happend */
#if defined(LWS_WITH_DETAILED_LATENCY)
if (wsi->context->detailed_latency_cb) {
wsi->detlat.type = LDLT_CONNECTION;
wsi->detlat.latencies[LAT_DUR_PROXY_CLIENT_REQ_TO_WRITE] =
lws_now_usecs() -
wsi->detlat.earliest_write_req_pre_write;
wsi->detlat.latencies[LAT_DUR_USERCB] = 0;
lws_det_lat_cb(wsi->context, &wsi->detlat);
wsi->detlat.earliest_write_req =
wsi->detlat.earliest_write_req_pre_write =
lws_now_usecs();
}
#endif
lws_addrinfo_clean(wsi);
if (wsi->protocol)
wsi->protocol->callback(wsi, LWS_CALLBACK_WSI_CREATE,
wsi->user_space, NULL, 0);
return lws_client_connect_4_established(wsi, NULL, plen);
oom4:
if (lwsi_role_client(wsi) && wsi->protocol /* && lwsi_state_est(wsi) */)
lws_inform_client_conn_fail(wsi,(void *)cce, strlen(cce));
/* take care that we might be inserted in fds already */
if (wsi->position_in_fds_table != LWS_NO_FDS_POS)
goto failed1;
/*
* We can't be an active client connection any more, if we thought
* that was what we were going to be doing. It should be if we are
* failing by oom4 path, we are still called by
* lws_client_connect_via_info() and will be returning NULL to that,
* so nobody else should have had a chance to queue on us.
*/
{
struct lws_vhost *vhost = wsi->vhost;
lws_vhost_lock(vhost);
__lws_free_wsi(wsi);
lws_vhost_unlock(vhost);
}
return NULL;
try_next_result_fds:
wsi->oom4 = 0;
__remove_wsi_socket_from_fds(wsi);
try_next_result_closesock:
compatible_close(wsi->desc.sockfd);
wsi->desc.sockfd = LWS_SOCK_INVALID;
try_next_result:
if (wsi->dns_results_next) {
wsi->dns_results_next = wsi->dns_results_next->ai_next;
if (wsi->dns_results_next)
goto next_result;
}
lws_addrinfo_clean(wsi);
cce = "Unable to connect";
//failed:
lws_inform_client_conn_fail(wsi, (void *)cce, strlen(cce));
failed1:
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS, "client_connect2");
return NULL;
}
struct lws *
lws_client_connect_2_dnsreq(struct lws *wsi)
{
const char *meth = NULL, *ads;
struct addrinfo *result = NULL;
#if defined(LWS_WITH_IPV6)
struct sockaddr_in addr;
const char *iface;
#endif
int n, port = 0;
struct lws *w;
if (lwsi_state(wsi) == LRS_WAITING_DNS) {
lwsl_notice("%s: LRS_WAITING_DNS\n", __func__);
return wsi;
}
if (wsi->stash)
meth = wsi->stash->cis[CIS_METHOD];
else
meth = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_METHOD);
/* we only pipeline connections that said it was okay */
if (!wsi->client_pipeline) {
lwsl_debug("%s: new conn on no pipeline flag\n", __func__);
goto solo;
}
/* only pipeline things we associate with being a stream */
if (meth && strcmp(meth, "RAW") && strcmp(meth, "GET") &&
strcmp(meth, "POST"))
goto solo;
/* consult active connections to find out disposition */
switch (lws_vhost_active_conns(wsi, &w)) {
case ACTIVE_CONNS_SOLO:
break;
case ACTIVE_CONNS_MUXED:
return wsi;
case ACTIVE_CONNS_QUEUED:
return lws_client_connect_4_established(wsi, w, 0);
}
solo:
wsi->addrinfo_idx = 0;
/*
* clients who will create their own fresh connection keep a copy of
* the hostname they originally connected to, in case other connections
* want to use it too
*/
if (!wsi->cli_hostname_copy) {
if (wsi->stash && wsi->stash->cis[CIS_HOST])
wsi->cli_hostname_copy =
lws_strdup(wsi->stash->cis[CIS_HOST]);
else {
char *pa = lws_hdr_simple_ptr(wsi,
_WSI_TOKEN_CLIENT_PEER_ADDRESS);
if (pa)
wsi->cli_hostname_copy = lws_strdup(pa);
}
}
/*
* If we made our own connection, and we're doing a method that can take
* a pipeline, we are an "active client connection".
*
* Add ourselves to the vhost list of those so that others can
* piggyback on our transaction queue
*/
if (meth && (!strcmp(meth, "RAW") || !strcmp(meth, "GET") ||
!strcmp(meth, "POST")) &&
lws_dll2_is_detached(&wsi->dll2_cli_txn_queue) &&
lws_dll2_is_detached(&wsi->dll_cli_active_conns)) {
lws_vhost_lock(wsi->vhost);
/* caution... we will have to unpick this on oom4 path */
lws_dll2_add_head(&wsi->dll_cli_active_conns,
&wsi->vhost->dll_cli_active_conns_owner);
lws_vhost_unlock(wsi->vhost);
}
/*
* unix socket destination?
*/
if (wsi->stash)
ads = wsi->stash->cis[CIS_ADDRESS];
else
ads = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS);
#if defined(LWS_WITH_UNIX_SOCK)
if (*ads == '+') {
wsi->unix_skt = 1;
n = 0;
goto next_step;
}
#endif
/*
* start off allowing ipv6 on connection if vhost allows it
*/
wsi->ipv6 = LWS_IPV6_ENABLED(wsi->vhost);
#ifdef LWS_WITH_IPV6
if (wsi->stash)
iface = wsi->stash->cis[CIS_IFACE];
else
iface = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_IFACE);
if (wsi->ipv6 && iface &&
inet_pton(AF_INET, iface, &addr.sin_addr) == 1) {
lwsl_notice("%s: client connection forced to IPv4\n", __func__);
wsi->ipv6 = 0;
}
#endif
#if defined(LWS_WITH_DETAILED_LATENCY)
if (lwsi_state(wsi) == LRS_WAITING_DNS &&
wsi->context->detailed_latency_cb) {
wsi->detlat.type = LDLT_NAME_RESOLUTION;
wsi->detlat.latencies[LAT_DUR_PROXY_CLIENT_REQ_TO_WRITE] =
lws_now_usecs() -
wsi->detlat.earliest_write_req_pre_write;
wsi->detlat.latencies[LAT_DUR_USERCB] = 0;
lws_det_lat_cb(wsi->context, &wsi->detlat);
wsi->detlat.earliest_write_req_pre_write = lws_now_usecs();
}
#endif
#if defined(LWS_CLIENT_HTTP_PROXYING) && \
(defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2))
/* Decide what it is we need to connect to:
*
* Priority 1: connect to http proxy */
if (wsi->vhost->http.http_proxy_port) {
ads = wsi->vhost->http.http_proxy_address;
port = wsi->vhost->http.http_proxy_port;
#else
if (0) {
#endif
#if defined(LWS_WITH_SOCKS5)
/* Priority 2: Connect to SOCK5 Proxy */
} else if (wsi->vhost->socks_proxy_port) {
lwsl_client("Sending SOCKS Greeting\n");
ads = wsi->vhost->socks_proxy_address;
port = wsi->vhost->socks_proxy_port;
#endif
} else {
/* Priority 3: Connect directly */
/* ads already set */
port = wsi->c_port;
}
/*
* prepare the actual connection
* to whatever we decided to connect to
*/
lwsi_set_state(wsi, LRS_WAITING_DNS);
lwsl_info("%s: %p: lookup %s:%u\n", __func__, wsi, ads, port);
(void)port;
#if defined(LWS_WITH_DETAILED_LATENCY)
wsi->detlat.earliest_write_req_pre_write = lws_now_usecs();
#endif
#if !defined(LWS_WITH_SYS_ASYNC_DNS)
if (wsi->dns_results)
n = 0;
else
n = lws_getaddrinfo46(wsi, ads, &result);
#else
lwsi_set_state(wsi, LRS_WAITING_DNS);
/* this is either FAILED, CONTINUING, or already called connect_4 */
n = lws_async_dns_query(wsi->context, wsi->tsi, ads, LWS_ADNS_RECORD_A,
lws_client_connect_3_connect, wsi, NULL);
if (n == LADNS_RET_FAILED_WSI_CLOSED)
return NULL;
if (n == LADNS_RET_FAILED)
goto failed1;
return wsi;
#endif
#if defined(LWS_WITH_UNIX_SOCK)
next_step:
#endif
return lws_client_connect_3_connect(wsi, ads, result, n, NULL);
#if defined(LWS_WITH_SYS_ASYNC_DNS)
failed1:
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS, "client_connect2");
return NULL;
#endif
}
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
static uint8_t hnames2[] = {
_WSI_TOKEN_CLIENT_ORIGIN,
_WSI_TOKEN_CLIENT_SENT_PROTOCOLS,
_WSI_TOKEN_CLIENT_METHOD,
_WSI_TOKEN_CLIENT_IFACE,
_WSI_TOKEN_CLIENT_ALPN
};
/**
* lws_client_reset() - retarget a connected wsi to start over with a new
* connection (ie, redirect)
* this only works if still in HTTP, ie, not upgraded yet
* wsi: connection to reset
* address: network address of the new server
* port: port to connect to
* path: uri path to connect to on the new server
* host: host header to send to the new server
*/
struct lws *
lws_client_reset(struct lws **pwsi, int ssl, const char *address, int port,
const char *path, const char *host)
{
char *stash, *p;
struct lws *wsi;
size_t size = 0;
int n;
if (!pwsi)
return NULL;
wsi = *pwsi;
lwsl_debug("%s: wsi %p: redir %d: %s\n", __func__, wsi, wsi->redirects,
address);
if (wsi->redirects == 3) {
lwsl_err("%s: Too many redirects\n", __func__);
return NULL;
}
wsi->redirects++;
/*
* goal is to close our role part, close the sockfd, detach the ah
* but leave our wsi extant and still bound to whatever vhost it was
*/
for (n = 0; n < (int)LWS_ARRAY_SIZE(hnames2); n++)
size += lws_hdr_total_length(wsi, hnames2[n]) + 1;
if ((int)size < lws_hdr_total_length(wsi, _WSI_TOKEN_CLIENT_URI) + 1)
size = lws_hdr_total_length(wsi, _WSI_TOKEN_CLIENT_URI) + 1;
/*
* The incoming address and host can be from inside the existing ah
* we are going to detach and reattch
*/
size += strlen(path) + 1 + strlen(address) + 1 + strlen(host) + 1 + 1;
p = stash = lws_malloc(size, __func__);
if (!stash)
return NULL;
/*
* _WSI_TOKEN_CLIENT_ORIGIN,
* _WSI_TOKEN_CLIENT_SENT_PROTOCOLS,
* _WSI_TOKEN_CLIENT_METHOD,
* _WSI_TOKEN_CLIENT_IFACE,
* _WSI_TOKEN_CLIENT_ALPN
* address
* host
* path
*/
for (n = 0; n < (int)LWS_ARRAY_SIZE(hnames2); n++)
if (lws_hdr_total_length(wsi, hnames2[n])) {
memcpy(p, lws_hdr_simple_ptr(wsi, hnames2[n]),
lws_hdr_total_length(wsi, hnames2[n]) + 1);
p += lws_hdr_total_length(wsi, hnames2[n]) + 1;
} else
*p++ = '\0';
memcpy(p, address, strlen(address) + 1);
address = p;
p += strlen(address) + 1;
memcpy(p, host, strlen(host) + 1);
host = p;
p += strlen(host) + 1;
memcpy(p, path, strlen(path) + 1);
path = p;
if (!port) {
lwsl_info("%s: forcing port 443\n", __func__);
port = 443;
ssl = 1;
}
lwsl_info("redirect ads='%s', port=%d, path='%s', ssl = %d, pifds %d\n",
address, port, path, ssl, wsi->position_in_fds_table);
__remove_wsi_socket_from_fds(wsi);
__lws_reset_wsi(wsi); /* detaches ah here */
wsi->client_pipeline = 1;
/* close the connection by hand */
#if defined(LWS_WITH_TLS)
lws_ssl_close(wsi);
#endif
if (wsi->role_ops && wsi->role_ops->close_kill_connection)
wsi->role_ops->close_kill_connection(wsi, 1);
if (wsi->context->event_loop_ops->close_handle_manually)
wsi->context->event_loop_ops->close_handle_manually(wsi);
else
if (wsi->desc.sockfd != LWS_SOCK_INVALID)
compatible_close(wsi->desc.sockfd);
#if defined(LWS_WITH_TLS)
if (!ssl)
wsi->tls.use_ssl &= LCCSCF_USE_SSL;
else
wsi->tls.use_ssl |= LCCSCF_USE_SSL;
#else
if (ssl) {
lwsl_err("%s: not configured for ssl\n", __func__);
goto bail;
}
#endif
if (wsi->protocol && wsi->role_ops && wsi->protocol_bind_balance) {
wsi->protocol->callback(wsi,
wsi->role_ops->protocol_unbind_cb[
!!lwsi_role_server(wsi)],
wsi->user_space, (void *)__func__, 0);
wsi->protocol_bind_balance = 0;
}
wsi->desc.sockfd = LWS_SOCK_INVALID;
lws_role_transition(wsi, LWSIFR_CLIENT, LRS_UNCONNECTED, &role_ops_h1);
// wsi->protocol = NULL;
if (wsi->protocol)
lws_bind_protocol(wsi, wsi->protocol, "client_reset");
wsi->pending_timeout = NO_PENDING_TIMEOUT;
wsi->c_port = port;
wsi->hdr_parsing_completed = 0;
if (lws_header_table_attach(wsi, 0)) {
lwsl_err("%s: failed to get ah\n", __func__);
goto bail;
}
//_lws_header_table_reset(wsi->http.ah);
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS, address))
goto bail;
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_HOST, host))
goto bail;
/*
* _WSI_TOKEN_CLIENT_ORIGIN,
* _WSI_TOKEN_CLIENT_SENT_PROTOCOLS,
* _WSI_TOKEN_CLIENT_METHOD,
* _WSI_TOKEN_CLIENT_IFACE,
* _WSI_TOKEN_CLIENT_ALPN
* address
* host
* path
*/
p = stash;
for (n = 0; n < (int)LWS_ARRAY_SIZE(hnames2); n++) {
if (lws_hdr_simple_create(wsi, hnames2[n], p))
goto bail;
p += lws_hdr_total_length(wsi, hnames2[n]) + 1;
}
stash[0] = '/';
memmove(&stash[1], path, size - 1 < strlen(path) + 1 ? size - 1 : strlen(path) + 1);
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_URI, stash))
goto bail;
lws_free_set_NULL(stash);
#if defined(LWS_WITH_HTTP2)
if (wsi->client_h2_substream)
wsi->h2.END_STREAM = wsi->h2.END_HEADERS = 0;
#endif
*pwsi = lws_client_connect_2_dnsreq(wsi);
return *pwsi;
bail:
lws_free_set_NULL(stash);
return NULL;
}
#if defined(LWS_WITH_HTTP_PROXY) && defined(LWS_WITH_HUBBUB)
hubbub_error
html_parser_cb(const hubbub_token *token, void *pw)
{
struct lws_rewrite *r = (struct lws_rewrite *)pw;
char buf[1024], *start = buf + LWS_PRE, *p = start,
*end = &buf[sizeof(buf) - 1], dotstar[128];
size_t i;
switch (token->type) {
case HUBBUB_TOKEN_DOCTYPE:
lws_strnncpy(dotstar, token->data.doctype.name.ptr,
token->data.doctype.name.len, sizeof(dotstar));
p += lws_snprintf(p, end - p, "<!DOCTYPE %s %s ",
dotstar, token->data.doctype.force_quirks ?
"(force-quirks) " : "");
if (token->data.doctype.public_missing)
lwsl_debug("\tpublic: missing\n");
else {
lws_strnncpy(dotstar, token->data.doctype.public_id.ptr,
token->data.doctype.public_id.len,
sizeof(dotstar));
p += lws_snprintf(p, end - p, "PUBLIC \"%s\"\n",
dotstar);
}
if (token->data.doctype.system_missing)
lwsl_debug("\tsystem: missing\n");
else {
lws_strnncpy(dotstar, token->data.doctype.system_id.ptr,
token->data.doctype.system_id.len,
sizeof(dotstar));
p += lws_snprintf(p, end - p, " \"%s\">\n", dotstar);
}
break;
case HUBBUB_TOKEN_START_TAG:
lws_strnncpy(dotstar, token->data.tag.name.ptr,
token->data.tag.name.len, sizeof(dotstar));
p += lws_snprintf(p, end - p, "<%s", dotstar);
/* (token->data.tag.self_closing) ?
"(self-closing) " : "",
(token->data.tag.n_attributes > 0) ?
"attributes:" : "");
*/
for (i = 0; i < token->data.tag.n_attributes; i++) {
if (!hstrcmp(&token->data.tag.attributes[i].name, "href", 4) ||
!hstrcmp(&token->data.tag.attributes[i].name, "action", 6) ||
!hstrcmp(&token->data.tag.attributes[i].name, "src", 3)) {
const char *pp = (const char *)token->data.tag.attributes[i].value.ptr;
int plen = (int) token->data.tag.attributes[i].value.len;
if (strncmp(pp, "http:", 5) && strncmp(pp, "https:", 6)) {
if (!hstrcmp(&token->data.tag.attributes[i].value,
r->from, r->from_len)) {
pp += r->from_len;
plen -= r->from_len;
}
lws_strnncpy(dotstar,
token->data.tag.attributes[i].name.ptr,
token->data.tag.attributes[i].name.len,
sizeof(dotstar));
p += lws_snprintf(p, end - p, " %s=\"%s",
dotstar, r->to);
lws_strnncpy(dotstar, pp, plen, sizeof(dotstar));
p += lws_snprintf(p, end - p, " /%s\"", dotstar);
continue;
}
}
lws_strnncpy(dotstar,
token->data.tag.attributes[i].name.ptr,
token->data.tag.attributes[i].name.len,
sizeof(dotstar));
p += lws_snprintf(p, end - p, " %s=\"", dotstar);
lws_strnncpy(dotstar,
token->data.tag.attributes[i].value.ptr,
token->data.tag.attributes[i].value.len,
sizeof(dotstar));
p += lws_snprintf(p, end - p, "%s\"", dotstar);
}
p += lws_snprintf(p, end - p, ">");
break;
case HUBBUB_TOKEN_END_TAG:
lws_strnncpy(dotstar, token->data.tag.name.ptr,
token->data.tag.name.len, sizeof(dotstar));
p += lws_snprintf(p, end - p, "</%s", dotstar);
/*
(token->data.tag.self_closing) ?
"(self-closing) " : "",
(token->data.tag.n_attributes > 0) ?
"attributes:" : "");
*/
for (i = 0; i < token->data.tag.n_attributes; i++) {
lws_strnncpy(dotstar,
token->data.tag.attributes[i].name.ptr,
token->data.tag.attributes[i].name.len,
sizeof(dotstar));
p += lws_snprintf(p, end - p, " %s='", dotstar);
lws_strnncpy(dotstar,
token->data.tag.attributes[i].value.ptr,
token->data.tag.attributes[i].value.len,
sizeof(dotstar));
p += lws_snprintf(p, end - p, "%s'\n", dotstar);
}
p += lws_snprintf(p, end - p, ">");
break;
case HUBBUB_TOKEN_COMMENT:
lws_strnncpy(dotstar, token->data.comment.ptr,
token->data.comment.len, sizeof(dotstar));
p += lws_snprintf(p, end - p, "<!-- %s -->\n", dotstar);
break;
case HUBBUB_TOKEN_CHARACTER:
if (token->data.character.len == 1) {
if (*token->data.character.ptr == '<') {
p += lws_snprintf(p, end - p, "<");
break;
}
if (*token->data.character.ptr == '>') {
p += lws_snprintf(p, end - p, ">");
break;
}
if (*token->data.character.ptr == '&') {
p += lws_snprintf(p, end - p, "&");
break;
}
}
lws_strnncpy(dotstar, token->data.character.ptr,
token->data.character.len, sizeof(dotstar));
p += lws_snprintf(p, end - p, "%s", dotstar);
break;
case HUBBUB_TOKEN_EOF:
p += lws_snprintf(p, end - p, "\n");
break;
}
if (r->wsi->protocol_bind_balance &&
user_callback_handle_rxflow(r->wsi->protocol->callback,
r->wsi, LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ,
r->wsi->user_space, start, p - start))
return -1;
return HUBBUB_OK;
}
#endif
#endif
static const uint8_t hnames[] = {
_WSI_TOKEN_CLIENT_PEER_ADDRESS,
_WSI_TOKEN_CLIENT_URI,
_WSI_TOKEN_CLIENT_HOST,
_WSI_TOKEN_CLIENT_ORIGIN,
_WSI_TOKEN_CLIENT_SENT_PROTOCOLS,
_WSI_TOKEN_CLIENT_METHOD,
_WSI_TOKEN_CLIENT_IFACE,
_WSI_TOKEN_CLIENT_ALPN
};
struct lws *
lws_http_client_connect_via_info2(struct lws *wsi)
{
struct client_info_stash *stash = wsi->stash;
int n;
lwsl_debug("%s: %p (stash %p)\n", __func__, wsi, stash);
if (!stash)
return wsi;
wsi->opaque_user_data = wsi->stash->opaque_user_data;
if (stash->cis[CIS_METHOD] && !strcmp(stash->cis[CIS_METHOD], "RAW"))
goto no_ah;
/*
* we're not necessarily in a position to action these right away,
* stash them... we only need during connect phase so into a temp
* allocated stash
*/
for (n = 0; n < (int)LWS_ARRAY_SIZE(hnames); n++)
if (hnames[n] && stash->cis[n]) {
if (lws_hdr_simple_create(wsi, hnames[n], stash->cis[n]))
goto bail1;
}
#if defined(LWS_WITH_SOCKS5)
if (!wsi->vhost->socks_proxy_port)
lws_free_set_NULL(wsi->stash);
#endif
no_ah:
wsi->context->count_wsi_allocated++;
return lws_client_connect_2_dnsreq(wsi);
bail1:
#if defined(LWS_WITH_SOCKS5)
if (!wsi->vhost->socks_proxy_port)
lws_free_set_NULL(wsi->stash);
#endif
return NULL;
}
#if defined(LWS_WITH_SOCKS5)
int
socks_generate_msg(struct lws *wsi, enum socks_msg_type type, ssize_t *msg_len)
{
struct lws_context *context = wsi->context;
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
uint8_t *p = pt->serv_buf, *end = &p[context->pt_serv_buf_size];
ssize_t n, passwd_len;
short net_num;
char *cp;
switch (type) {
case SOCKS_MSG_GREETING:
if (lws_ptr_diff(end, p) < 4)
return 1;
/* socks version, version 5 only */
*p++ = SOCKS_VERSION_5;
/* number of methods */
*p++ = 2;
/* username password method */
*p++ = SOCKS_AUTH_USERNAME_PASSWORD;
/* no authentication method */
*p++ = SOCKS_AUTH_NO_AUTH;
break;
case SOCKS_MSG_USERNAME_PASSWORD:
n = strlen(wsi->vhost->socks_user);
passwd_len = strlen(wsi->vhost->socks_password);
if (n > 254 || passwd_len > 254)
return 1;
if (lws_ptr_diff(end, p) < 3 + n + passwd_len)
return 1;
/* the subnegotiation version */
*p++ = SOCKS_SUBNEGOTIATION_VERSION_1;
/* length of the user name */
*p++ = n;
/* user name */
memcpy(p, wsi->vhost->socks_user, n);
p += n;
/* length of the password */
*p++ = passwd_len;
/* password */
memcpy(p, wsi->vhost->socks_password, passwd_len);
p += passwd_len;
break;
case SOCKS_MSG_CONNECT:
n = strlen(wsi->stash->cis[CIS_ADDRESS]);
if (n > 254 || lws_ptr_diff(end, p) < 5 + n + 2)
return 1;
cp = (char *)&net_num;
/* socks version */
*p++ = SOCKS_VERSION_5;
/* socks command */
*p++ = SOCKS_COMMAND_CONNECT;
/* reserved */
*p++ = 0;
/* address type */
*p++ = SOCKS_ATYP_DOMAINNAME;
/* length of ---> */
*p++ = n;
/* the address we tell SOCKS proxy to connect to */
memcpy(p, wsi->stash->cis[CIS_ADDRESS], n);
p += n;
net_num = htons(wsi->c_port);
/* the port we tell SOCKS proxy to connect to */
*p++ = cp[0];
*p++ = cp[1];
break;
default:
return 1;
}
*msg_len = lws_ptr_diff(p, pt->serv_buf);
return 0;
}
#endif