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godot/thirdparty/libwebsockets/roles/http/client/client-handshake.c

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#include "core/private.h"
static int
lws_getaddrinfo46(struct lws *wsi, const char *ads, struct addrinfo **result)
{
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
*result = NULL;
#ifdef LWS_WITH_IPV6
if (wsi->ipv6) {
#if !defined(__ANDROID__)
hints.ai_family = AF_INET6;
hints.ai_flags = AI_V4MAPPED;
#endif
} else
#endif
{
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
}
return getaddrinfo(ads, NULL, &hints, result);
}
struct lws *
lws_client_connect_2(struct lws *wsi)
{
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
struct lws_context *context = wsi->context;
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
const char *adsin;
struct lws *wsi_piggyback = NULL;
struct lws_pollfd pfd;
ssize_t plen = 0;
#endif
struct addrinfo *result;
const char *ads;
sockaddr46 sa46;
int n, port;
const char *cce = "", *iface;
const char *meth = NULL;
#ifdef LWS_WITH_IPV6
char ipv6only = lws_check_opt(wsi->vhost->options,
LWS_SERVER_OPTION_IPV6_V6ONLY_MODIFY |
LWS_SERVER_OPTION_IPV6_V6ONLY_VALUE);
#if defined(__ANDROID__)
ipv6only = 0;
#endif
#endif
lwsl_client("%s: %p\n", __func__, wsi);
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
if (!wsi->http.ah) {
cce = "ah was NULL at cc2";
lwsl_err("%s\n", cce);
goto oom4;
}
/* we can only piggyback GET or POST */
meth = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_METHOD);
if (meth && strcmp(meth, "GET") && strcmp(meth, "POST"))
goto create_new_conn;
/* we only pipeline connections that said it was okay */
if (!wsi->client_pipeline)
goto create_new_conn;
/*
* let's take a look first and see if there are any already-active
* client connections we can piggy-back on.
*/
adsin = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS);
lws_vhost_lock(wsi->vhost); /* ----------------------------------- { */
lws_start_foreach_dll_safe(struct lws_dll_lws *, d, d1,
wsi->vhost->dll_active_client_conns.next) {
struct lws *w = lws_container_of(d, struct lws,
dll_active_client_conns);
lwsl_debug("%s: check %s %s %d %d\n", __func__, adsin,
w->client_hostname_copy, wsi->c_port, w->c_port);
if (w != wsi && w->client_hostname_copy &&
!strcmp(adsin, w->client_hostname_copy) &&
#if defined(LWS_WITH_TLS)
(wsi->tls.use_ssl & LCCSCF_USE_SSL) ==
(w->tls.use_ssl & LCCSCF_USE_SSL) &&
#endif
wsi->c_port == w->c_port) {
/* someone else is already connected to the right guy */
/* do we know for a fact pipelining won't fly? */
if (w->keepalive_rejected) {
lwsl_info("defeating pipelining due to no "
"keepalive on server\n");
lws_vhost_unlock(wsi->vhost); /* } ---------- */
goto create_new_conn;
}
#if defined (LWS_WITH_HTTP2)
/*
* h2: in usable state already: just use it without
* going through the queue
*/
if (w->client_h2_alpn &&
(lwsi_state(w) == LRS_H2_WAITING_TO_SEND_HEADERS ||
lwsi_state(w) == LRS_ESTABLISHED)) {
lwsl_info("%s: just join h2 directly\n",
__func__);
wsi->client_h2_alpn = 1;
lws_wsi_h2_adopt(w, wsi);
lws_vhost_unlock(wsi->vhost); /* } ---------- */
return wsi;
}
#endif
lwsl_info("applying %p to txn queue on %p (wsistate 0x%x)\n",
wsi, w, w->wsistate);
/*
* ...let's add ourselves to his transaction queue...
* we are adding ourselves at the HEAD
*/
lws_dll_lws_add_front(&wsi->dll_client_transaction_queue,
&w->dll_client_transaction_queue_head);
/*
* h1: pipeline our headers out on him,
* and wait for our turn at client transaction_complete
* to take over parsing the rx.
*/
wsi_piggyback = w;
lws_vhost_unlock(wsi->vhost); /* } ---------- */
goto send_hs;
}
} lws_end_foreach_dll_safe(d, d1);
lws_vhost_unlock(wsi->vhost); /* } ---------------------------------- */
create_new_conn:
#endif
/*
* 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->client_hostname_copy)
wsi->client_hostname_copy =
strdup(lws_hdr_simple_ptr(wsi,
_WSI_TOKEN_CLIENT_PEER_ADDRESS));
/*
* 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, "GET") || !strcmp(meth, "POST")) &&
lws_dll_is_null(&wsi->dll_client_transaction_queue) &&
lws_dll_is_null(&wsi->dll_active_client_conns)) {
lws_vhost_lock(wsi->vhost);
lws_dll_lws_add_front(&wsi->dll_active_client_conns,
&wsi->vhost->dll_active_client_conns);
lws_vhost_unlock(wsi->vhost);
}
/*
* start off allowing ipv6 on connection if vhost allows it
*/
wsi->ipv6 = LWS_IPV6_ENABLED(wsi->vhost);
#if 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) {
plen = sprintf((char *)pt->serv_buf,
"CONNECT %s:%u HTTP/1.0\x0d\x0a"
"User-agent: libwebsockets\x0d\x0a",
lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS),
wsi->c_port);
if (wsi->vhost->proxy_basic_auth_token[0])
plen += sprintf((char *)pt->serv_buf + plen,
"Proxy-authorization: basic %s\x0d\x0a",
wsi->vhost->proxy_basic_auth_token);
plen += sprintf((char *)pt->serv_buf + plen, "\x0d\x0a");
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) {
socks_generate_msg(wsi, SOCKS_MSG_GREETING, &plen);
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 = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS);
port = wsi->c_port;
}
/*
* prepare the actual connection
* to whatever we decided to connect to
*/
lwsl_info("%s: %p: address %s\n", __func__, wsi, ads);
n = lws_getaddrinfo46(wsi, ads, &result);
#ifdef LWS_WITH_IPV6
if (wsi->ipv6) {
struct sockaddr_in6 *sa6 =
((struct sockaddr_in6 *)result->ai_addr);
if (n) {
/* 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;
}
memset(&sa46, 0, sizeof(sa46));
sa46.sa6.sin6_family = AF_INET6;
switch (result->ai_family) {
case AF_INET:
if (ipv6only)
break;
/* map IPv4 to IPv6 */
bzero((char *)&sa46.sa6.sin6_addr,
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 *)result->ai_addr)->sin_addr,
sizeof(struct in_addr));
lwsl_notice("uplevelling AF_INET to AF_INET6\n");
break;
case AF_INET6:
memcpy(&sa46.sa6.sin6_addr, &sa6->sin6_addr,
sizeof(struct in6_addr));
sa46.sa6.sin6_scope_id = sa6->sin6_scope_id;
sa46.sa6.sin6_flowinfo = sa6->sin6_flowinfo;
break;
default:
lwsl_err("Unknown address family\n");
freeaddrinfo(result);
cce = "unknown address family";
goto oom4;
}
} else
#endif /* use ipv6 */
/* use ipv4 */
{
void *p = NULL;
if (!n) {
struct addrinfo *res = result;
/* pick the first AF_INET (IPv4) result */
while (!p && res) {
switch (res->ai_family) {
case AF_INET:
p = &((struct sockaddr_in *)res->ai_addr)->sin_addr;
break;
}
res = res->ai_next;
}
#if defined(LWS_FALLBACK_GETHOSTBYNAME)
} else if (n == EAI_SYSTEM) {
struct hostent *host;
lwsl_info("getaddrinfo (ipv4) failed, trying gethostbyname\n");
host = gethostbyname(ads);
if (host) {
p = host->h_addr;
} else {
lwsl_err("gethostbyname failed\n");
cce = "gethostbyname (ipv4) failed";
goto oom4;
}
#endif
} else {
lwsl_err("getaddrinfo failed\n");
cce = "getaddrinfo failed";
goto oom4;
}
if (!p) {
if (result)
freeaddrinfo(result);
lwsl_err("Couldn't identify address\n");
cce = "unable to lookup address";
goto oom4;
}
sa46.sa4.sin_family = AF_INET;
sa46.sa4.sin_addr = *((struct in_addr *)p);
bzero(&sa46.sa4.sin_zero, 8);
}
if (result)
freeaddrinfo(result);
/* now we decided on ipv4 or ipv6, set the port */
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;
}
#ifdef LWS_WITH_IPV6
if (wsi->ipv6)
wsi->desc.sockfd = socket(AF_INET6, SOCK_STREAM, 0);
else
#endif
wsi->desc.sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (!lws_socket_is_valid(wsi->desc.sockfd)) {
lwsl_warn("Unable to open socket\n");
cce = "unable to open socket";
goto oom4;
}
if (lws_plat_set_socket_options(wsi->vhost, wsi->desc.sockfd)) {
lwsl_err("Failed to set wsi socket options\n");
compatible_close(wsi->desc.sockfd);
cce = "set socket opts failed";
goto oom4;
}
lwsi_set_state(wsi, LRS_WAITING_CONNECT);
if (wsi->context->event_loop_ops->accept)
wsi->context->event_loop_ops->accept(wsi);
if (__insert_wsi_socket_into_fds(wsi->context, wsi)) {
compatible_close(wsi->desc.sockfd);
cce = "insert wsi failed";
goto oom4;
}
lws_change_pollfd(wsi, 0, LWS_POLLIN);
/*
* past here, we can't simply free the structs as error
* handling as oom4 does. We have to run the whole close flow.
*/
if (!wsi->protocol)
wsi->protocol = &wsi->vhost->protocols[0];
wsi->protocol->callback(wsi, LWS_CALLBACK_WSI_CREATE,
wsi->user_space, NULL, 0);
lws_set_timeout(wsi, PENDING_TIMEOUT_AWAITING_CONNECT_RESPONSE,
AWAITING_TIMEOUT);
iface = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_IFACE);
if (iface) {
n = lws_socket_bind(wsi->vhost, wsi->desc.sockfd, 0, iface);
if (n < 0) {
cce = "unable to bind socket";
goto failed;
}
}
}
#ifdef LWS_WITH_IPV6
if (wsi->ipv6) {
sa46.sa6.sin6_port = htons(port);
n = sizeof(struct sockaddr_in6);
} else
#endif
{
sa46.sa4.sin_port = htons(port);
n = sizeof(struct sockaddr);
}
if (connect(wsi->desc.sockfd, (const struct sockaddr *)&sa46, n) == -1 ||
LWS_ERRNO == LWS_EISCONN) {
if (LWS_ERRNO == LWS_EALREADY ||
LWS_ERRNO == LWS_EINPROGRESS ||
LWS_ERRNO == LWS_EWOULDBLOCK
#ifdef _WIN32
|| LWS_ERRNO == WSAEINVAL
#endif
) {
lwsl_client("nonblocking connect retry (errno = %d)\n",
LWS_ERRNO);
if (lws_plat_check_connection_error(wsi)) {
cce = "socket connect failed";
goto failed;
}
/*
* must do specifically a POLLOUT poll to hear
* about the connect completion
*/
if (lws_change_pollfd(wsi, 0, LWS_POLLOUT)) {
cce = "POLLOUT set failed";
goto failed;
}
return wsi;
}
if (LWS_ERRNO != LWS_EISCONN) {
lwsl_notice("Connect failed errno=%d\n", LWS_ERRNO);
cce = "connect failed";
goto failed;
}
}
lwsl_client("connected\n");
#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) {
/*
* OK from now on we talk via the proxy, so connect to that
*
* (will overwrite existing pointer,
* leaving old string/frag there but unreferenced)
*/
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
#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_dll_is_null(&wsi->dll_client_transaction_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);
lwsl_info("%s: wsi %p: waiting to send headers (parent state %x)\n",
__func__, wsi, lwsi_state(wsi_piggyback));
} else {
lwsl_info("%s: wsi %p: client creating own connection\n",
__func__, wsi);
/* we are making our own connection */
lwsi_set_state(wsi, LRS_H1C_ISSUE_HANDSHAKE);
/*
* 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);
pfd.fd = wsi->desc.sockfd;
pfd.events = LWS_POLLIN;
pfd.revents = LWS_POLLIN;
n = lws_service_fd(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;
oom4:
if (lwsi_role_client(wsi) && lwsi_state_est(wsi)) {
wsi->protocol->callback(wsi,
LWS_CALLBACK_CLIENT_CONNECTION_ERROR,
wsi->user_space, (void *)cce, strlen(cce));
wsi->already_did_cce = 1;
}
/* take care that we might be inserted in fds already */
if (wsi->position_in_fds_table != LWS_NO_FDS_POS)
goto failed1;
lws_remove_from_timeout_list(wsi);
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
lws_header_table_detach(wsi, 0);
#endif
lws_client_stash_destroy(wsi);
lws_free_set_NULL(wsi->client_hostname_copy);
lws_free(wsi);
return NULL;
failed:
wsi->protocol->callback(wsi,
LWS_CALLBACK_CLIENT_CONNECTION_ERROR,
wsi->user_space, (void *)cce, strlen(cce));
wsi->already_did_cce = 1;
failed1:
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS, "client_connect2");
return NULL;
}
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
/**
* 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
*/
LWS_VISIBLE struct lws *
lws_client_reset(struct lws **pwsi, int ssl, const char *address, int port,
const char *path, const char *host)
{
char origin[300] = "", protocol[300] = "", method[32] = "",
iface[16] = "", alpn[32] = "", *p;
struct lws *wsi = *pwsi;
if (wsi->redirects == 3) {
lwsl_err("%s: Too many redirects\n", __func__);
return NULL;
}
wsi->redirects++;
p = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_ORIGIN);
if (p)
lws_strncpy(origin, p, sizeof(origin));
p = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS);
if (p)
lws_strncpy(protocol, p, sizeof(protocol));
p = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_METHOD);
if (p)
lws_strncpy(method, p, sizeof(method));
p = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_IFACE);
if (p)
lws_strncpy(iface, p, sizeof(iface));
p = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_ALPN);
if (p)
lws_strncpy(alpn, p, sizeof(alpn));
lwsl_info("redirect ads='%s', port=%d, path='%s', ssl = %d\n",
address, port, path, ssl);
/* close the connection by hand */
#if defined(LWS_WITH_TLS)
lws_ssl_close(wsi);
#endif
if (wsi->context->event_loop_ops->close_handle_manually)
wsi->context->event_loop_ops->close_handle_manually(wsi);
else
compatible_close(wsi->desc.sockfd);
__remove_wsi_socket_from_fds(wsi);
#if defined(LWS_WITH_TLS)
wsi->tls.use_ssl = ssl;
#else
if (ssl) {
lwsl_err("%s: not configured for ssl\n", __func__);
return NULL;
}
#endif
wsi->desc.sockfd = LWS_SOCK_INVALID;
lwsi_set_state(wsi, LRS_UNCONNECTED);
wsi->protocol = NULL;
wsi->pending_timeout = NO_PENDING_TIMEOUT;
wsi->c_port = port;
wsi->hdr_parsing_completed = 0;
_lws_header_table_reset(wsi->http.ah);
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS, address))
return NULL;
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_HOST, host))
return NULL;
if (origin[0])
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_ORIGIN,
origin))
return NULL;
if (protocol[0])
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS,
protocol))
return NULL;
if (method[0])
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_METHOD,
method))
return NULL;
if (iface[0])
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_IFACE,
iface))
return NULL;
if (alpn[0])
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_ALPN,
alpn))
return NULL;
origin[0] = '/';
strncpy(&origin[1], path, sizeof(origin) - 2);
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_URI, origin))
return NULL;
*pwsi = lws_client_connect_2(wsi);
return *pwsi;
}
#ifdef LWS_WITH_HTTP_PROXY
static 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];
size_t i;
switch (token->type) {
case HUBBUB_TOKEN_DOCTYPE:
p += lws_snprintf(p, end - p, "<!DOCTYPE %.*s %s ",
(int) token->data.doctype.name.len,
token->data.doctype.name.ptr,
token->data.doctype.force_quirks ?
"(force-quirks) " : "");
if (token->data.doctype.public_missing)
lwsl_debug("\tpublic: missing\n");
else
p += lws_snprintf(p, end - p, "PUBLIC \"%.*s\"\n",
(int) token->data.doctype.public_id.len,
token->data.doctype.public_id.ptr);
if (token->data.doctype.system_missing)
lwsl_debug("\tsystem: missing\n");
else
p += lws_snprintf(p, end - p, " \"%.*s\">\n",
(int) token->data.doctype.system_id.len,
token->data.doctype.system_id.ptr);
break;
case HUBBUB_TOKEN_START_TAG:
p += lws_snprintf(p, end - p, "<%.*s", (int)token->data.tag.name.len,
token->data.tag.name.ptr);
/* (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;
}
p += lws_snprintf(p, end - p, " %.*s=\"%s/%.*s\"",
(int) token->data.tag.attributes[i].name.len,
token->data.tag.attributes[i].name.ptr,
r->to, plen, pp);
continue;
}
}
p += lws_snprintf(p, end - p, " %.*s=\"%.*s\"",
(int) token->data.tag.attributes[i].name.len,
token->data.tag.attributes[i].name.ptr,
(int) token->data.tag.attributes[i].value.len,
token->data.tag.attributes[i].value.ptr);
}
p += lws_snprintf(p, end - p, ">");
break;
case HUBBUB_TOKEN_END_TAG:
p += lws_snprintf(p, end - p, "</%.*s", (int) token->data.tag.name.len,
token->data.tag.name.ptr);
/*
(token->data.tag.self_closing) ?
"(self-closing) " : "",
(token->data.tag.n_attributes > 0) ?
"attributes:" : "");
*/
for (i = 0; i < token->data.tag.n_attributes; i++) {
p += lws_snprintf(p, end - p, " %.*s='%.*s'\n",
(int) token->data.tag.attributes[i].name.len,
token->data.tag.attributes[i].name.ptr,
(int) token->data.tag.attributes[i].value.len,
token->data.tag.attributes[i].value.ptr);
}
p += lws_snprintf(p, end - p, ">");
break;
case HUBBUB_TOKEN_COMMENT:
p += lws_snprintf(p, end - p, "<!-- %.*s -->\n",
(int) token->data.comment.len,
token->data.comment.ptr);
break;
case HUBBUB_TOKEN_CHARACTER:
if (token->data.character.len == 1) {
if (*token->data.character.ptr == '<') {
p += lws_snprintf(p, end - p, "&lt;");
break;
}
if (*token->data.character.ptr == '>') {
p += lws_snprintf(p, end - p, "&gt;");
break;
}
if (*token->data.character.ptr == '&') {
p += lws_snprintf(p, end - p, "&amp;");
break;
}
}
p += lws_snprintf(p, end - p, "%.*s", (int) token->data.character.len,
token->data.character.ptr);
break;
case HUBBUB_TOKEN_EOF:
p += lws_snprintf(p, end - p, "\n");
break;
}
if (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 char *
lws_strdup(const char *s)
{
char *d = lws_malloc(strlen(s) + 1, "strdup");
if (d)
strcpy(d, s);
return d;
}
void
lws_client_stash_destroy(struct lws *wsi)
{
if (!wsi || !wsi->stash)
return;
lws_free_set_NULL(wsi->stash->address);
lws_free_set_NULL(wsi->stash->path);
lws_free_set_NULL(wsi->stash->host);
lws_free_set_NULL(wsi->stash->origin);
lws_free_set_NULL(wsi->stash->protocol);
lws_free_set_NULL(wsi->stash->method);
lws_free_set_NULL(wsi->stash->iface);
lws_free_set_NULL(wsi->stash->alpn);
lws_free_set_NULL(wsi->stash);
}
LWS_VISIBLE struct lws *
lws_client_connect_via_info(struct lws_client_connect_info *i)
{
struct lws *wsi;
const struct lws_protocols *p;
const char *local = i->protocol;
if (i->context->requested_kill)
return NULL;
if (!i->context->protocol_init_done)
lws_protocol_init(i->context);
/*
* If we have .local_protocol_name, use it to select the
* local protocol handler to bind to. Otherwise use .protocol if
* http[s].
*/
if (i->local_protocol_name)
local = i->local_protocol_name;
wsi = lws_zalloc(sizeof(struct lws), "client wsi");
if (wsi == NULL)
goto bail;
wsi->context = i->context;
#if defined(LWS_ROLE_H1)
/* assert the mode and union status (hdr) clearly */
lws_role_transition(wsi, LWSIFR_CLIENT, LRS_UNCONNECTED, &role_ops_h1);
#else
lws_role_transition(wsi, LWSIFR_CLIENT, LRS_UNCONNECTED, &role_ops_raw_skt);
#endif
wsi->desc.sockfd = LWS_SOCK_INVALID;
/* 1) fill up the wsi with stuff from the connect_info as far as it
* can go. It's because not only is our connection async, we might
* not even be able to get ahold of an ah at this point.
*/
if (!i->method) /* ie, ws */
#if defined(LWS_ROLE_WS)
if (lws_create_client_ws_object(i, wsi))
return NULL;
#else
return NULL;
#endif
wsi->user_space = NULL;
wsi->pending_timeout = NO_PENDING_TIMEOUT;
wsi->position_in_fds_table = LWS_NO_FDS_POS;
wsi->c_port = i->port;
wsi->vhost = i->vhost;
if (!wsi->vhost)
wsi->vhost = i->context->vhost_list;
if (!wsi->vhost) {
lwsl_err("At least one vhost in the context is required\n");
goto bail;
}
wsi->protocol = &wsi->vhost->protocols[0];
wsi->client_pipeline = !!(i->ssl_connection & LCCSCF_PIPELINE);
/* reasonable place to start */
lws_role_transition(wsi, LWSIFR_CLIENT, LRS_UNCONNECTED,
#if defined(LWS_ROLE_H1)
&role_ops_h1);
#else
&role_ops_raw_skt);
#endif
/*
* 1) for http[s] connection, allow protocol selection by name
* 2) for ws[s], if local_protocol_name given also use it for
* local protocol binding... this defeats the server
* protocol negotiation if so
*
* Otherwise leave at protocols[0]... the server will tell us
* which protocol we are associated with since we can give it a
* list.
*/
if (/*(i->method || i->local_protocol_name) && */local) {
lwsl_info("binding to %s\n", local);
p = lws_vhost_name_to_protocol(wsi->vhost, local);
if (p)
wsi->protocol = p;
}
if (wsi && !wsi->user_space && i->userdata) {
wsi->user_space_externally_allocated = 1;
wsi->user_space = i->userdata;
} else
/* if we stay in http, we can assign the user space now,
* otherwise do it after the protocol negotiated
*/
if (i->method)
if (lws_ensure_user_space(wsi))
goto bail;
#if defined(LWS_WITH_TLS)
wsi->tls.use_ssl = i->ssl_connection;
#else
if (i->ssl_connection & LCCSCF_USE_SSL) {
lwsl_err("libwebsockets not configured for ssl\n");
goto bail;
}
#endif
/* 2) stash the things from connect_info that we can't process without
* an ah. Because if no ah, we will go on the ah waiting list and
* process those things later (after the connect_info and maybe the
* things pointed to have gone out of scope.
*/
wsi->stash = lws_zalloc(sizeof(*wsi->stash), "client stash");
if (!wsi->stash) {
lwsl_err("%s: OOM\n", __func__);
goto bail1;
}
wsi->stash->address = lws_strdup(i->address);
wsi->stash->path = lws_strdup(i->path);
wsi->stash->host = lws_strdup(i->host);
if (!wsi->stash->address || !wsi->stash->path || !wsi->stash->host)
goto bail1;
if (i->origin) {
wsi->stash->origin = lws_strdup(i->origin);
if (!wsi->stash->origin)
goto bail1;
}
if (i->protocol) {
wsi->stash->protocol = lws_strdup(i->protocol);
if (!wsi->stash->protocol)
goto bail1;
}
if (i->method) {
wsi->stash->method = lws_strdup(i->method);
if (!wsi->stash->method)
goto bail1;
}
if (i->iface) {
wsi->stash->iface = lws_strdup(i->iface);
if (!wsi->stash->iface)
goto bail1;
}
/*
* For ws, default to http/1.1 only. If i->alpn is set, defer to
* whatever he has set in there (eg, "h2").
*
* The problem is he has to commit to h2 before he can find out if the
* server has the SETTINGS for ws-over-h2 enabled; if not then ws is
* not possible on that connection. So we only try it if he
* assertively said to use h2 alpn.
*/
if (!i->method && !i->alpn) {
wsi->stash->alpn = lws_strdup("http/1.1");
if (!wsi->stash->alpn)
goto bail1;
} else
if (i->alpn) {
wsi->stash->alpn = lws_strdup(i->alpn);
if (!wsi->stash->alpn)
goto bail1;
}
if (i->pwsi)
*i->pwsi = wsi;
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
/* if we went on the waiting list, no probs just return the wsi
* when we get the ah, now or later, he will call
* lws_client_connect_via_info2() below.
*/
if (lws_header_table_attach(wsi, 0) < 0) {
/*
* if we failed here, the connection is already closed
* and freed.
*/
goto bail2;
}
#endif
if (i->parent_wsi) {
lwsl_info("%s: created child %p of parent %p\n", __func__,
wsi, i->parent_wsi);
wsi->parent = i->parent_wsi;
wsi->sibling_list = i->parent_wsi->child_list;
i->parent_wsi->child_list = wsi;
}
#ifdef LWS_WITH_HTTP_PROXY
if (i->uri_replace_to)
wsi->http.rw = lws_rewrite_create(wsi, html_parser_cb,
i->uri_replace_from,
i->uri_replace_to);
#endif
return wsi;
bail1:
lws_client_stash_destroy(wsi);
bail:
lws_free(wsi);
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
bail2:
#endif
if (i->pwsi)
*i->pwsi = NULL;
return NULL;
}
struct lws *
lws_client_connect_via_info2(struct lws *wsi)
{
struct client_info_stash *stash = wsi->stash;
if (!stash)
return wsi;
/*
* 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
*/
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS,
stash->address))
goto bail1;
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_URI, stash->path))
goto bail1;
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_HOST, stash->host))
goto bail1;
if (stash->origin)
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_ORIGIN,
stash->origin))
goto bail1;
/*
* this is a list of protocols we tell the server we're okay with
* stash it for later when we compare server response with it
*/
if (stash->protocol)
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS,
stash->protocol))
goto bail1;
if (stash->method)
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_METHOD,
stash->method))
goto bail1;
if (stash->iface)
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_IFACE,
stash->iface))
goto bail1;
if (stash->alpn)
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_ALPN,
stash->alpn))
goto bail1;
#if defined(LWS_WITH_SOCKS5)
if (!wsi->vhost->socks_proxy_port)
lws_client_stash_destroy(wsi);
#endif
wsi->context->count_wsi_allocated++;
return lws_client_connect_2(wsi);
bail1:
#if defined(LWS_WITH_SOCKS5)
if (!wsi->vhost->socks_proxy_port)
lws_free_set_NULL(wsi->stash);
#endif
return NULL;
}
LWS_VISIBLE struct lws *
lws_client_connect_extended(struct lws_context *context, const char *address,
int port, int ssl_connection, const char *path,
const char *host, const char *origin,
const char *protocol, int ietf_version_or_minus_one,
void *userdata)
{
struct lws_client_connect_info i;
memset(&i, 0, sizeof(i));
i.context = context;
i.address = address;
i.port = port;
i.ssl_connection = ssl_connection;
i.path = path;
i.host = host;
i.origin = origin;
i.protocol = protocol;
i.ietf_version_or_minus_one = ietf_version_or_minus_one;
i.userdata = userdata;
return lws_client_connect_via_info(&i);
}
LWS_VISIBLE struct lws *
lws_client_connect(struct lws_context *context, const char *address,
int port, int ssl_connection, const char *path,
const char *host, const char *origin,
const char *protocol, int ietf_version_or_minus_one)
{
struct lws_client_connect_info i;
memset(&i, 0, sizeof(i));
i.context = context;
i.address = address;
i.port = port;
i.ssl_connection = ssl_connection;
i.path = path;
i.host = host;
i.origin = origin;
i.protocol = protocol;
i.ietf_version_or_minus_one = ietf_version_or_minus_one;
i.userdata = NULL;
return lws_client_connect_via_info(&i);
}
#if defined(LWS_WITH_SOCKS5)
void 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];
ssize_t len = 0, n, passwd_len;
short net_num;
char *p;
switch (type) {
case SOCKS_MSG_GREETING:
/* socks version, version 5 only */
pt->serv_buf[len++] = SOCKS_VERSION_5;
/* number of methods */
pt->serv_buf[len++] = 2;
/* username password method */
pt->serv_buf[len++] = SOCKS_AUTH_USERNAME_PASSWORD;
/* no authentication method */
pt->serv_buf[len++] = SOCKS_AUTH_NO_AUTH;
break;
case SOCKS_MSG_USERNAME_PASSWORD:
n = strlen(wsi->vhost->socks_user);
passwd_len = strlen(wsi->vhost->socks_password);
/* the subnegotiation version */
pt->serv_buf[len++] = SOCKS_SUBNEGOTIATION_VERSION_1;
/* length of the user name */
pt->serv_buf[len++] = n;
/* user name */
lws_strncpy((char *)&pt->serv_buf[len], wsi->vhost->socks_user,
context->pt_serv_buf_size - len + 1);
len += n;
/* length of the password */
pt->serv_buf[len++] = passwd_len;
/* password */
lws_strncpy((char *)&pt->serv_buf[len], wsi->vhost->socks_password,
context->pt_serv_buf_size - len + 1);
len += passwd_len;
break;
case SOCKS_MSG_CONNECT:
p = (char*)&net_num;
/* socks version */
pt->serv_buf[len++] = SOCKS_VERSION_5;
/* socks command */
pt->serv_buf[len++] = SOCKS_COMMAND_CONNECT;
/* reserved */
pt->serv_buf[len++] = 0;
/* address type */
pt->serv_buf[len++] = SOCKS_ATYP_DOMAINNAME;
/* skip length, we fill it in at the end */
n = len++;
/* the address we tell SOCKS proxy to connect to */
lws_strncpy((char *)&(pt->serv_buf[len]), wsi->stash->address,
context->pt_serv_buf_size - len + 1);
len += strlen(wsi->stash->address);
net_num = htons(wsi->c_port);
/* the port we tell SOCKS proxy to connect to */
pt->serv_buf[len++] = p[0];
pt->serv_buf[len++] = p[1];
/* the length of the address, excluding port */
pt->serv_buf[n] = strlen(wsi->stash->address);
break;
default:
return;
}
*msg_len = len;
}
#endif
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