/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010-2016 Andy Green <andy@warmcat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include "private-libwebsockets.h"
#ifdef LWS_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if defined(WIN32) || defined(_WIN32)
#else
#include <sys/wait.h>
#endif
#ifdef LWS_USE_IPV6
#if defined(WIN32) || defined(_WIN32)
#include <Iphlpapi.h>
#else
#include <net/if.h>
#endif
#endif
int log_level = LLL_ERR | LLL_WARN | LLL_NOTICE;
static void (*lwsl_emit)(int level, const char *line)
#ifndef LWS_PLAT_OPTEE
= lwsl_emit_stderr
#endif
;
#ifndef LWS_PLAT_OPTEE
static const char * const log_level_names[] = {
"ERR",
"WARN",
"NOTICE",
"INFO",
"DEBUG",
"PARSER",
"HEADER",
"EXTENSION",
"CLIENT",
"LATENCY",
"USER",
"?",
"?"
};
#endif
void
lws_free_wsi(struct lws *wsi)
{
if (!wsi)
return;
/* Protocol user data may be allocated either internally by lws
* or by specified the user.
* We should only free what we allocated. */
if (wsi->protocol && wsi->protocol->per_session_data_size &&
wsi->user_space && !wsi->user_space_externally_allocated)
lws_free(wsi->user_space);
lws_free_set_NULL(wsi->rxflow_buffer);
lws_free_set_NULL(wsi->trunc_alloc);
/* we may not have an ah, but may be on the waiting list... */
lwsl_info("ah det due to close\n");
lws_header_table_detach(wsi, 0);
wsi->context->count_wsi_allocated--;
lwsl_debug("%s: %p, remaining wsi %d\n", __func__, wsi,
wsi->context->count_wsi_allocated);
lws_free(wsi);
}
static void
lws_remove_from_timeout_list(struct lws *wsi)
{
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
if (!wsi->timeout_list_prev) /* ie, not part of the list */
return;
lws_pt_lock(pt);
/* if we have a next guy, set his prev to our prev */
if (wsi->timeout_list)
wsi->timeout_list->timeout_list_prev = wsi->timeout_list_prev;
/* set our prev guy to our next guy instead of us */
*wsi->timeout_list_prev = wsi->timeout_list;
/* we're out of the list, we should not point anywhere any more */
wsi->timeout_list_prev = NULL;
wsi->timeout_list = NULL;
lws_pt_unlock(pt);
}
LWS_VISIBLE void
lws_set_timeout(struct lws *wsi, enum pending_timeout reason, int secs)
{
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
time_t now;
lws_pt_lock(pt);
time(&now);
if (reason && !wsi->timeout_list_prev) {
/* our next guy is current first guy */
wsi->timeout_list = pt->timeout_list;
/* if there is a next guy, set his prev ptr to our next ptr */
if (wsi->timeout_list)
wsi->timeout_list->timeout_list_prev = &wsi->timeout_list;
/* our prev ptr is first ptr */
wsi->timeout_list_prev = &pt->timeout_list;
/* set the first guy to be us */
*wsi->timeout_list_prev = wsi;
}
lwsl_debug("%s: %p: %d secs\n", __func__, wsi, secs);
wsi->pending_timeout_limit = now + secs;
wsi->pending_timeout = reason;
lws_pt_unlock(pt);
if (!reason)
lws_remove_from_timeout_list(wsi);
}
void
lws_close_free_wsi(struct lws *wsi, enum lws_close_status reason)
{
struct lws_context_per_thread *pt;
struct lws **pwsi, *wsi1, *wsi2;
struct lws_context *context;
struct lws_tokens eff_buf;
int n, m, ret;
if (!wsi)
return;
lws_access_log(wsi);
#if defined(LWS_WITH_ESP8266)
if (wsi->premature_rx)
lws_free(wsi->premature_rx);
if (wsi->pending_send_completion && !wsi->close_is_pending_send_completion) {
lwsl_notice("delaying close\n");
wsi->close_is_pending_send_completion = 1;
return;
}
#endif
if (wsi->u.hdr.ah)
/* we're closing, losing some rx is OK */
wsi->u.hdr.ah->rxpos = wsi->u.hdr.ah->rxlen;
context = wsi->context;
pt = &context->pt[(int)wsi->tsi];
/* if we have children, close them first */
if (wsi->child_list) {
wsi2 = wsi->child_list;
while (wsi2) {
//lwsl_notice("%s: closing %p: close child %p\n",
// __func__, wsi, wsi2);
wsi1 = wsi2->sibling_list;
//lwsl_notice("%s: closing %p: next sibling %p\n",
// __func__, wsi2, wsi1);
wsi2->parent = NULL;
/* stop it doing shutdown processing */
wsi2->socket_is_permanently_unusable = 1;
lws_close_free_wsi(wsi2, reason);
wsi2 = wsi1;
}
wsi->child_list = NULL;
}
#ifdef LWS_WITH_CGI
if (wsi->mode == LWSCM_CGI) {
/* we are not a network connection, but a handler for CGI io */
if (wsi->parent && wsi->parent->cgi)
/* end the binding between us and master */
wsi->parent->cgi->stdwsi[(int)wsi->cgi_channel] = NULL;
wsi->socket_is_permanently_unusable = 1;
lwsl_debug("------ %s: detected cgi fdhandler wsi %p\n", __func__, wsi);
goto just_kill_connection;
}
if (wsi->cgi) {
struct lws_cgi **pcgi = &pt->cgi_list;
/* remove us from the cgi list */
lwsl_debug("%s: remove cgi %p from list\n", __func__, wsi->cgi);
while (*pcgi) {
if (*pcgi == wsi->cgi) {
/* drop us from the pt cgi list */
*pcgi = (*pcgi)->cgi_list;
break;
}
pcgi = &(*pcgi)->cgi_list;
}
/* we have a cgi going, we must kill it */
wsi->cgi->being_closed = 1;
lws_cgi_kill(wsi);
}
#endif
if (wsi->mode == LWSCM_HTTP_SERVING_ACCEPTED &&
wsi->u.http.fd != LWS_INVALID_FILE) {
lws_plat_file_close(wsi, wsi->u.http.fd);
wsi->u.http.fd = LWS_INVALID_FILE;
wsi->vhost->protocols->callback(wsi,
LWS_CALLBACK_CLOSED_HTTP, wsi->user_space, NULL, 0);
wsi->told_user_closed = 1;
}
if (wsi->socket_is_permanently_unusable ||
reason == LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY ||
wsi->state == LWSS_SHUTDOWN)
goto just_kill_connection;
wsi->state_pre_close = wsi->state;
switch (wsi->state_pre_close) {
case LWSS_DEAD_SOCKET:
return;
/* we tried the polite way... */
case LWSS_AWAITING_CLOSE_ACK:
goto just_kill_connection;
case LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE:
if (wsi->trunc_len) {
lws_callback_on_writable(wsi);
return;
}
lwsl_info("wsi %p completed LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE\n", wsi);
goto just_kill_connection;
default:
if (wsi->trunc_len) {
lwsl_info("wsi %p entering LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE\n", wsi);
wsi->state = LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE;
lws_set_timeout(wsi, PENDING_FLUSH_STORED_SEND_BEFORE_CLOSE, 5);
return;
}
break;
}
if (wsi->mode == LWSCM_WSCL_WAITING_CONNECT ||
wsi->mode == LWSCM_WSCL_ISSUE_HANDSHAKE)
goto just_kill_connection;
if (wsi->mode == LWSCM_HTTP_SERVING) {
if (wsi->user_space)
wsi->vhost->protocols->callback(wsi,
LWS_CALLBACK_HTTP_DROP_PROTOCOL,
wsi->user_space, NULL, 0);
wsi->vhost->protocols->callback(wsi, LWS_CALLBACK_CLOSED_HTTP,
wsi->user_space, NULL, 0);
wsi->told_user_closed = 1;
}
if (wsi->mode & LWSCM_FLAG_IMPLIES_CALLBACK_CLOSED_CLIENT_HTTP) {
wsi->vhost->protocols[0].callback(wsi, LWS_CALLBACK_CLOSED_CLIENT_HTTP,
wsi->user_space, NULL, 0);
wsi->told_user_closed = 1;
}
/*
* are his extensions okay with him closing? Eg he might be a mux
* parent and just his ch1 aspect is closing?
*/
if (lws_ext_cb_active(wsi,
LWS_EXT_CB_CHECK_OK_TO_REALLY_CLOSE, NULL, 0) > 0) {
lwsl_ext("extension vetoed close\n");
return;
}
/*
* flush any tx pending from extensions, since we may send close packet
* if there are problems with send, just nuke the connection
*/
do {
ret = 0;
eff_buf.token = NULL;
eff_buf.token_len = 0;
/* show every extension the new incoming data */
m = lws_ext_cb_active(wsi,
LWS_EXT_CB_FLUSH_PENDING_TX, &eff_buf, 0);
if (m < 0) {
lwsl_ext("Extension reports fatal error\n");
goto just_kill_connection;
}
if (m)
/*
* at least one extension told us he has more
* to spill, so we will go around again after
*/
ret = 1;
/* assuming they left us something to send, send it */
if (eff_buf.token_len)
if (lws_issue_raw(wsi, (unsigned char *)eff_buf.token,
eff_buf.token_len) !=
eff_buf.token_len) {
lwsl_debug("close: ext spill failed\n");
goto just_kill_connection;
}
} while (ret);
/*
* signal we are closing, lws_write will
* add any necessary version-specific stuff. If the write fails,
* no worries we are closing anyway. If we didn't initiate this
* close, then our state has been changed to
* LWSS_RETURNED_CLOSE_ALREADY and we will skip this.
*
* Likewise if it's a second call to close this connection after we
* sent the close indication to the peer already, we are in state
* LWSS_AWAITING_CLOSE_ACK and will skip doing this a second time.
*/
if (wsi->state_pre_close == LWSS_ESTABLISHED &&
(wsi->u.ws.close_in_ping_buffer_len || /* already a reason */
(reason != LWS_CLOSE_STATUS_NOSTATUS &&
(reason != LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY)))) {
lwsl_debug("sending close indication...\n");
/* if no prepared close reason, use 1000 and no aux data */
if (!wsi->u.ws.close_in_ping_buffer_len) {
wsi->u.ws.close_in_ping_buffer_len = 2;
wsi->u.ws.ping_payload_buf[LWS_PRE] =
(reason >> 16) & 0xff;
wsi->u.ws.ping_payload_buf[LWS_PRE + 1] =
reason & 0xff;
}
#if defined (LWS_WITH_ESP8266)
wsi->close_is_pending_send_completion = 1;
#endif
n = lws_write(wsi, &wsi->u.ws.ping_payload_buf[LWS_PRE],
wsi->u.ws.close_in_ping_buffer_len,
LWS_WRITE_CLOSE);
if (n >= 0) {
/*
* we have sent a nice protocol level indication we
* now wish to close, we should not send anything more
*/
wsi->state = LWSS_AWAITING_CLOSE_ACK;
/*
* ...and we should wait for a reply for a bit
* out of politeness
*/
lws_set_timeout(wsi, PENDING_TIMEOUT_CLOSE_ACK, 1);
lwsl_debug("sent close indication, awaiting ack\n");
return;
}
lwsl_info("close: sending close packet failed, hanging up\n");
/* else, the send failed and we should just hang up */
}
just_kill_connection:
if (wsi->parent) {
/* detach ourselves from parent's child list */
pwsi = &wsi->parent->child_list;
while (*pwsi) {
if (*pwsi == wsi) {
//lwsl_notice("%s: detach %p from parent %p\n",
// __func__, wsi, wsi->parent);
*pwsi = wsi->sibling_list;
break;
}
pwsi = &(*pwsi)->sibling_list;
}
if (*pwsi)
lwsl_err("%s: failed to detach from parent\n",
__func__);
}
#if 0
/* manage the vhost same protocol list entry */
if (wsi->same_vh_protocol_prev) { // we are on the vh list
// make guy who pointed to us, point to what our next was pointing to
*wsi->same_vh_protocol_prev = wsi->same_vh_protocol_next;
// if we had a next guy...
if (wsi->same_vh_protocol_next)
// have him point back to our prev
wsi->same_vh_protocol_next->same_vh_protocol_prev =
wsi->same_vh_protocol_prev;
}
#endif
#if LWS_POSIX
/*
* Testing with ab shows that we have to stage the socket close when
* the system is under stress... shutdown any further TX, change the
* state to one that won't emit anything more, and wait with a timeout
* for the POLLIN to show a zero-size rx before coming back and doing
* the actual close.
*/
if (wsi->state != LWSS_SHUTDOWN &&
wsi->state != LWSS_CLIENT_UNCONNECTED &&
reason != LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY &&
!wsi->socket_is_permanently_unusable) {
lwsl_info("%s: shutting down connection: %p (sock %d, state %d)\n", __func__, wsi, wsi->sock, wsi->state);
n = shutdown(wsi->sock, SHUT_WR);
if (n)
lwsl_debug("closing: shutdown (state %d) ret %d\n", wsi->state, LWS_ERRNO);
// This causes problems with disconnection when the events are half closing connection
// FD_READ | FD_CLOSE (33)
#ifndef _WIN32_WCE
/* libuv: no event available to guarantee completion */
if (!LWS_LIBUV_ENABLED(context)) {
lws_change_pollfd(wsi, LWS_POLLOUT, LWS_POLLIN);
wsi->state = LWSS_SHUTDOWN;
lws_set_timeout(wsi, PENDING_TIMEOUT_SHUTDOWN_FLUSH,
context->timeout_secs);
return;
}
#endif
}
#endif
lwsl_info("%s: real just_kill_connection: %p (sockfd %d)\n", __func__,
wsi, wsi->sock);
#ifdef LWS_WITH_HTTP_PROXY
if (wsi->rw) {
lws_rewrite_destroy(wsi->rw);
wsi->rw = NULL;
}
#endif
/*
* we won't be servicing or receiving anything further from this guy
* delete socket from the internal poll list if still present
*/
lws_ssl_remove_wsi_from_buffered_list(wsi);
lws_remove_from_timeout_list(wsi);
/* checking return redundant since we anyway close */
if (wsi->sock != LWS_SOCK_INVALID)
remove_wsi_socket_from_fds(wsi);
#if defined(LWS_WITH_ESP8266)
espconn_disconnect(wsi->sock);
#endif
wsi->state = LWSS_DEAD_SOCKET;
lws_free_set_NULL(wsi->rxflow_buffer);
if (wsi->state_pre_close == LWSS_ESTABLISHED ||
wsi->mode == LWSCM_WS_SERVING ||
wsi->mode == LWSCM_WS_CLIENT) {
if (wsi->u.ws.rx_draining_ext) {
struct lws **w = &pt->rx_draining_ext_list;
wsi->u.ws.rx_draining_ext = 0;
/* remove us from context draining ext list */
while (*w) {
if (*w == wsi) {
*w = wsi->u.ws.rx_draining_ext_list;
break;
}
w = &((*w)->u.ws.rx_draining_ext_list);
}
wsi->u.ws.rx_draining_ext_list = NULL;
}
if (wsi->u.ws.tx_draining_ext) {
struct lws **w = &pt->tx_draining_ext_list;
wsi->u.ws.tx_draining_ext = 0;
/* remove us from context draining ext list */
while (*w) {
if (*w == wsi) {
*w = wsi->u.ws.tx_draining_ext_list;
break;
}
w = &((*w)->u.ws.tx_draining_ext_list);
}
wsi->u.ws.tx_draining_ext_list = NULL;
}
lws_free_set_NULL(wsi->u.ws.rx_ubuf);
if (wsi->trunc_alloc)
/* not going to be completed... nuke it */
lws_free_set_NULL(wsi->trunc_alloc);
wsi->u.ws.ping_payload_len = 0;
wsi->u.ws.ping_pending_flag = 0;
}
/* tell the user it's all over for this guy */
if (wsi->protocol && wsi->protocol->callback &&
((wsi->state_pre_close == LWSS_ESTABLISHED) ||
(wsi->state_pre_close == LWSS_RETURNED_CLOSE_ALREADY) ||
(wsi->state_pre_close == LWSS_AWAITING_CLOSE_ACK) ||
(wsi->state_pre_close == LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE) ||
(wsi->mode == LWSCM_WS_CLIENT && wsi->state_pre_close == LWSS_HTTP) ||
(wsi->mode == LWSCM_WS_SERVING && wsi->state_pre_close == LWSS_HTTP))) {
if (wsi->user_space) {
lwsl_debug("%s: doing LWS_CALLBACK_HTTP_DROP_PROTOCOL for %p prot %s", __func__, wsi, wsi->protocol->name);
wsi->protocol->callback(wsi,
LWS_CALLBACK_HTTP_DROP_PROTOCOL,
wsi->user_space, NULL, 0);
}
lwsl_debug("calling back CLOSED\n");
wsi->protocol->callback(wsi, LWS_CALLBACK_CLOSED,
wsi->user_space, NULL, 0);
} else if (wsi->mode == LWSCM_HTTP_SERVING_ACCEPTED) {
lwsl_debug("calling back CLOSED_HTTP\n");
wsi->vhost->protocols->callback(wsi, LWS_CALLBACK_CLOSED_HTTP,
wsi->user_space, NULL, 0 );
} else if ((wsi->mode == LWSCM_WSCL_WAITING_SERVER_REPLY ||
wsi->mode == LWSCM_WSCL_WAITING_CONNECT) &&
!wsi->already_did_cce) {
wsi->vhost->protocols[0].callback(wsi,
LWS_CALLBACK_CLIENT_CONNECTION_ERROR,
wsi->user_space, NULL, 0);
} else
lwsl_debug("not calling back closed mode=%d state=%d\n",
wsi->mode, wsi->state_pre_close);
/* deallocate any active extension contexts */
if (lws_ext_cb_active(wsi, LWS_EXT_CB_DESTROY, NULL, 0) < 0)
lwsl_warn("extension destruction failed\n");
/*
* inform all extensions in case they tracked this guy out of band
* even though not active on him specifically
*/
if (lws_ext_cb_all_exts(context, wsi,
LWS_EXT_CB_DESTROY_ANY_WSI_CLOSING, NULL, 0) < 0)
lwsl_warn("ext destroy wsi failed\n");
wsi->socket_is_permanently_unusable = 1;
#ifdef LWS_USE_LIBUV
if (LWS_LIBUV_ENABLED(context)) {
lwsl_debug("%s: lws_libuv_closehandle: wsi %p\n", __func__, wsi);
/* libuv has to do his own close handle processing asynchronously */
lws_libuv_closehandle(wsi);
return;
}
#endif
lws_close_free_wsi_final(wsi);
}
void
lws_close_free_wsi_final(struct lws *wsi)
{
int n;
if (!lws_ssl_close(wsi) && lws_socket_is_valid(wsi->sock)) {
#if LWS_POSIX
//lwsl_err("*** closing sockfd %d\n", wsi->sock);
n = compatible_close(wsi->sock);
if (n)
lwsl_debug("closing: close ret %d\n", LWS_ERRNO);
#else
compatible_close(wsi->sock);
(void)n;
#endif
wsi->sock = LWS_SOCK_INVALID;
}
/* outermost destroy notification for wsi (user_space still intact) */
wsi->vhost->protocols[0].callback(wsi, LWS_CALLBACK_WSI_DESTROY,
wsi->user_space, NULL, 0);
#ifdef LWS_WITH_CGI
if (wsi->cgi) {
for (n = 0; n < 6; n++) {
if (wsi->cgi->pipe_fds[n / 2][n & 1] == 0)
lwsl_err("ZERO FD IN CGI CLOSE");
if (wsi->cgi->pipe_fds[n / 2][n & 1] >= 0)
close(wsi->cgi->pipe_fds[n / 2][n & 1]);
}
lws_free(wsi->cgi);
}
#endif
lws_free_wsi(wsi);
}
LWS_VISIBLE LWS_EXTERN const char *
lws_get_urlarg_by_name(struct lws *wsi, const char *name, char *buf, int len)
{
int n = 0, sl = strlen(name);
while (lws_hdr_copy_fragment(wsi, buf, len,
WSI_TOKEN_HTTP_URI_ARGS, n) >= 0) {
if (!strncmp(buf, name, sl))
return buf + sl;
n++;
}
return NULL;
}
#if LWS_POSIX
LWS_VISIBLE int
interface_to_sa(struct lws_vhost *vh, const char *ifname, struct sockaddr_in *addr, size_t addrlen)
{
int ipv6 = 0;
#ifdef LWS_USE_IPV6
ipv6 = LWS_IPV6_ENABLED(vh);
#endif
(void)vh;
return lws_interface_to_sa(ipv6, ifname, addr, addrlen);
}
#endif
#ifndef LWS_PLAT_OPTEE
#if LWS_POSIX
static int
lws_get_addresses(struct lws_vhost *vh, void *ads, char *name,
int name_len, char *rip, int rip_len)
{
#if LWS_POSIX
struct addrinfo ai, *res;
struct sockaddr_in addr4;
if (rip)
rip[0] = '\0';
name[0] = '\0';
addr4.sin_family = AF_UNSPEC;
#ifdef LWS_USE_IPV6
if (LWS_IPV6_ENABLED(vh)) {
if (!lws_plat_inet_ntop(AF_INET6, &((struct sockaddr_in6 *)ads)->sin6_addr, rip, rip_len)) {
lwsl_err("inet_ntop: %s", strerror(LWS_ERRNO));
return -1;
}
// Strip off the IPv4 to IPv6 header if one exists
if (strncmp(rip, "::ffff:", 7) == 0)
memmove(rip, rip + 7, strlen(rip) - 6);
getnameinfo((struct sockaddr *)ads,
sizeof(struct sockaddr_in6), name,
name_len, NULL, 0, 0);
return 0;
} else
#endif
{
struct addrinfo *result;
memset(&ai, 0, sizeof ai);
ai.ai_family = PF_UNSPEC;
ai.ai_socktype = SOCK_STREAM;
ai.ai_flags = AI_CANONNAME;
if (getnameinfo((struct sockaddr *)ads,
sizeof(struct sockaddr_in),
name, name_len, NULL, 0, 0))
return -1;
if (!rip)
return 0;
if (getaddrinfo(name, NULL, &ai, &result))
return -1;
res = result;
while (addr4.sin_family == AF_UNSPEC && res) {
switch (res->ai_family) {
case AF_INET:
addr4.sin_addr = ((struct sockaddr_in *)res->ai_addr)->sin_addr;
addr4.sin_family = AF_INET;
break;
}
res = res->ai_next;
}
freeaddrinfo(result);
}
if (addr4.sin_family == AF_UNSPEC)
return -1;
if (lws_plat_inet_ntop(AF_INET, &addr4.sin_addr, rip, rip_len) == NULL)
return -1;
return 0;
#else
(void)vh;
(void)ads;
(void)name;
(void)name_len;
(void)rip;
(void)rip_len;
return -1;
#endif
}
#endif
LWS_VISIBLE const char *
lws_get_peer_simple(struct lws *wsi, char *name, int namelen)
{
#if LWS_POSIX
socklen_t len, olen;
#ifdef LWS_USE_IPV6
struct sockaddr_in6 sin6;
#endif
struct sockaddr_in sin4;
int af = AF_INET;
void *p, *q;
#ifdef LWS_USE_IPV6
if (LWS_IPV6_ENABLED(wsi->vhost)) {
len = sizeof(sin6);
p = &sin6;
af = AF_INET6;
q = &sin6.sin6_addr;
} else
#endif
{
len = sizeof(sin4);
p = &sin4;
q = &sin4.sin_addr;
}
olen = len;
if (getpeername(wsi->sock, p, &len) < 0 || len > olen) {
lwsl_warn("getpeername: %s\n", strerror(LWS_ERRNO));
return NULL;
}
return lws_plat_inet_ntop(af, q, name, namelen);
#else
#if defined(LWS_WITH_ESP8266)
return lws_plat_get_peer_simple(wsi, name, namelen);
#else
return NULL;
#endif
#endif
}
#endif
LWS_VISIBLE void
lws_get_peer_addresses(struct lws *wsi, lws_sockfd_type fd, char *name,
int name_len, char *rip, int rip_len)
{
#ifndef LWS_PLAT_OPTEE
#if LWS_POSIX
socklen_t len;
#ifdef LWS_USE_IPV6
struct sockaddr_in6 sin6;
#endif
struct sockaddr_in sin4;
struct lws_context *context = wsi->context;
int ret = -1;
void *p;
rip[0] = '\0';
name[0] = '\0';
lws_latency_pre(context, wsi);
#ifdef LWS_USE_IPV6
if (LWS_IPV6_ENABLED(wsi->vhost)) {
len = sizeof(sin6);
p = &sin6;
} else
#endif
{
len = sizeof(sin4);
p = &sin4;
}
if (getpeername(fd, p, &len) < 0) {
lwsl_warn("getpeername: %s\n", strerror(LWS_ERRNO));
goto bail;
}
ret = lws_get_addresses(wsi->vhost, p, name, name_len, rip, rip_len);
bail:
lws_latency(context, wsi, "lws_get_peer_addresses", ret, 1);
#endif
#endif
(void)wsi;
(void)fd;
(void)name;
(void)name_len;
(void)rip;
(void)rip_len;
}
LWS_EXTERN void *
lws_context_user(struct lws_context *context)
{
return context->user_space;
}
LWS_VISIBLE struct lws_vhost *
lws_vhost_get(struct lws *wsi)
{
return wsi->vhost;
}
LWS_VISIBLE struct lws_vhost *
lws_get_vhost(struct lws *wsi)
{
return wsi->vhost;
}
LWS_VISIBLE const struct lws_protocols *
lws_protocol_get(struct lws *wsi)
{
return wsi->protocol;
}
LWS_VISIBLE int
lws_callback_all_protocol(struct lws_context *context,
const struct lws_protocols *protocol, int reason)
{
struct lws_context_per_thread *pt = &context->pt[0];
unsigned int n, m = context->count_threads;
struct lws *wsi;
while (m--) {
for (n = 0; n < pt->fds_count; n++) {
wsi = wsi_from_fd(context, pt->fds[n].fd);
if (!wsi)
continue;
if (wsi->protocol == protocol)
protocol->callback(wsi, reason, wsi->user_space,
NULL, 0);
}
pt++;
}
return 0;
}
LWS_VISIBLE int
lws_callback_all_protocol_vhost(struct lws_vhost *vh,
const struct lws_protocols *protocol, int reason)
{
struct lws_context *context = vh->context;
struct lws_context_per_thread *pt = &context->pt[0];
unsigned int n, m = context->count_threads;
struct lws *wsi;
while (m--) {
for (n = 0; n < pt->fds_count; n++) {
wsi = wsi_from_fd(context, pt->fds[n].fd);
if (!wsi)
continue;
if (wsi->vhost == vh && wsi->protocol == protocol)
protocol->callback(wsi, reason, wsi->user_space,
NULL, 0);
}
pt++;
}
return 0;
}
LWS_VISIBLE LWS_EXTERN int
lws_callback_vhost_protocols(struct lws *wsi, int reason, void *in, int len)
{
int n;
for (n = 0; n < wsi->vhost->count_protocols; n++)
if (wsi->vhost->protocols[n].callback(wsi, reason, NULL, in, len))
return 1;
return 0;
}
/**
* lws_now_secs() - seconds since 1970-1-1
*
*/
LWS_VISIBLE LWS_EXTERN unsigned long
lws_now_secs(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec;
}
#if LWS_POSIX
LWS_VISIBLE int
lws_get_socket_fd(struct lws *wsi)
{
return wsi->sock;
}
#endif
#ifdef LWS_LATENCY
void
lws_latency(struct lws_context *context, struct lws *wsi, const char *action,
int ret, int completed)
{
unsigned long long u;
char buf[256];
u = time_in_microseconds();
if (!action) {
wsi->latency_start = u;
if (!wsi->action_start)
wsi->action_start = u;
return;
}
if (completed) {
if (wsi->action_start == wsi->latency_start)
sprintf(buf,
"Completion first try lat %lluus: %p: ret %d: %s\n",
u - wsi->latency_start,
(void *)wsi, ret, action);
else
sprintf(buf,
"Completion %lluus: lat %lluus: %p: ret %d: %s\n",
u - wsi->action_start,
u - wsi->latency_start,
(void *)wsi, ret, action);
wsi->action_start = 0;
} else
sprintf(buf, "lat %lluus: %p: ret %d: %s\n",
u - wsi->latency_start, (void *)wsi, ret, action);
if (u - wsi->latency_start > context->worst_latency) {
context->worst_latency = u - wsi->latency_start;
strcpy(context->worst_latency_info, buf);
}
lwsl_latency("%s", buf);
}
#endif
LWS_VISIBLE int
lws_rx_flow_control(struct lws *wsi, int enable)
{
if (enable == (wsi->rxflow_change_to & LWS_RXFLOW_ALLOW))
return 0;
lwsl_info("%s: (0x%p, %d)\n", __func__, wsi, enable);
wsi->rxflow_change_to = LWS_RXFLOW_PENDING_CHANGE | !!enable;
return 0;
}
LWS_VISIBLE void
lws_rx_flow_allow_all_protocol(const struct lws_context *context,
const struct lws_protocols *protocol)
{
const struct lws_context_per_thread *pt = &context->pt[0];
struct lws *wsi;
unsigned int n, m = context->count_threads;
while (m--) {
for (n = 0; n < pt->fds_count; n++) {
wsi = wsi_from_fd(context, pt->fds[n].fd);
if (!wsi)
continue;
if (wsi->protocol == protocol)
lws_rx_flow_control(wsi, LWS_RXFLOW_ALLOW);
}
pt++;
}
}
LWS_VISIBLE extern const char *
lws_canonical_hostname(struct lws_context *context)
{
return (const char *)context->canonical_hostname;
}
int user_callback_handle_rxflow(lws_callback_function callback_function,
struct lws *wsi,
enum lws_callback_reasons reason, void *user,
void *in, size_t len)
{
int n;
n = callback_function(wsi, reason, user, in, len);
if (!n)
n = _lws_rx_flow_control(wsi);
return n;
}
#if defined(LWS_WITH_ESP8266)
#undef strchr
#define strchr ets_strchr
#endif
LWS_VISIBLE int
lws_set_proxy(struct lws_vhost *vhost, const char *proxy)
{
#if !defined(LWS_WITH_ESP8266)
char *p;
char authstring[96];
if (!proxy)
return -1;
/* we have to deal with a possible redundant leading http:// */
if (!strncmp(proxy, "http://", 7))
proxy += 7;
p = strchr(proxy, '@');
if (p) { /* auth is around */
if ((unsigned int)(p - proxy) > sizeof(authstring) - 1)
goto auth_too_long;
strncpy(authstring, proxy, p - proxy);
// null termination not needed on input
if (lws_b64_encode_string(authstring, (p - proxy),
vhost->proxy_basic_auth_token,
sizeof vhost->proxy_basic_auth_token) < 0)
goto auth_too_long;
lwsl_info(" Proxy auth in use\n");
proxy = p + 1;
} else
vhost->proxy_basic_auth_token[0] = '\0';
strncpy(vhost->http_proxy_address, proxy,
sizeof(vhost->http_proxy_address) - 1);
vhost->http_proxy_address[
sizeof(vhost->http_proxy_address) - 1] = '\0';
p = strchr(vhost->http_proxy_address, ':');
if (!p && !vhost->http_proxy_port) {
lwsl_err("http_proxy needs to be ads:port\n");
return -1;
} else {
if (p) {
*p = '\0';
vhost->http_proxy_port = atoi(p + 1);
}
}
lwsl_info(" Proxy %s:%u\n", vhost->http_proxy_address,
vhost->http_proxy_port);
return 0;
auth_too_long:
lwsl_err("proxy auth too long\n");
#endif
return -1;
}
LWS_VISIBLE const struct lws_protocols *
lws_get_protocol(struct lws *wsi)
{
return wsi->protocol;
}
LWS_VISIBLE int
lws_is_final_fragment(struct lws *wsi)
{
lwsl_info("%s: final %d, rx pk length %ld, draining %ld", __func__,
wsi->u.ws.final, (long)wsi->u.ws.rx_packet_length,
(long)wsi->u.ws.rx_draining_ext);
return wsi->u.ws.final && !wsi->u.ws.rx_packet_length && !wsi->u.ws.rx_draining_ext;
}
LWS_VISIBLE unsigned char
lws_get_reserved_bits(struct lws *wsi)
{
return wsi->u.ws.rsv;
}
int
lws_ensure_user_space(struct lws *wsi)
{
lwsl_info("%s: %p protocol %p\n", __func__, wsi, wsi->protocol);
if (!wsi->protocol)
return 1;
/* allocate the per-connection user memory (if any) */
if (wsi->protocol->per_session_data_size && !wsi->user_space) {
wsi->user_space = lws_zalloc(wsi->protocol->per_session_data_size);
if (wsi->user_space == NULL) {
lwsl_err("Out of memory for conn user space\n");
return 1;
}
} else
lwsl_info("%s: %p protocol pss %lu, user_space=%p\n",
__func__, wsi, (long)wsi->protocol->per_session_data_size,
wsi->user_space);
return 0;
}
LWS_VISIBLE int
lwsl_timestamp(int level, char *p, int len)
{
#ifndef LWS_PLAT_OPTEE
time_t o_now = time(NULL);
unsigned long long now;
struct tm *ptm = NULL;
#ifndef WIN32
struct tm tm;
#endif
int n;
#ifndef _WIN32_WCE
#ifdef WIN32
ptm = localtime(&o_now);
#else
if (localtime_r(&o_now, &tm))
ptm = &tm;
#endif
#endif
p[0] = '\0';
for (n = 0; n < LLL_COUNT; n++) {
if (level != (1 << n))
continue;
now = time_in_microseconds() / 100;
if (ptm)
n = lws_snprintf(p, len,
"[%04d/%02d/%02d %02d:%02d:%02d:%04d] %s: ",
ptm->tm_year + 1900,
ptm->tm_mon + 1,
ptm->tm_mday,
ptm->tm_hour,
ptm->tm_min,
ptm->tm_sec,
(int)(now % 10000), log_level_names[n]);
else
n = lws_snprintf(p, len, "[%llu:%04d] %s: ",
(unsigned long long) now / 10000,
(int)(now % 10000), log_level_names[n]);
return n;
}
#endif
return 0;
}
#ifndef LWS_PLAT_OPTEE
LWS_VISIBLE void lwsl_emit_stderr(int level, const char *line)
{
#if !defined(LWS_WITH_ESP8266)
char buf[50];
lwsl_timestamp(level, buf, sizeof(buf));
fprintf(stderr, "%s%s", buf, line);
#endif
}
#endif
LWS_VISIBLE void _lws_logv(int filter, const char *format, va_list vl)
{
#if defined(LWS_WITH_ESP8266)
char buf[128];
#else
char buf[256];
#endif
int n;
if (!(log_level & filter))
return;
n = vsnprintf(buf, sizeof(buf) - 1, format, vl);
(void)n;
#if defined(LWS_WITH_ESP8266)
buf[sizeof(buf) - 1] = '\0';
#else
/* vnsprintf returns what it would have written, even if truncated */
if (n > sizeof(buf) - 1)
n = sizeof(buf) - 1;
if (n > 0)
buf[n] = '\0';
#endif
lwsl_emit(filter, buf);
}
LWS_VISIBLE void _lws_log(int filter, const char *format, ...)
{
va_list ap;
va_start(ap, format);
_lws_logv(filter, format, ap);
va_end(ap);
}
LWS_VISIBLE void lws_set_log_level(int level,
void (*func)(int level, const char *line))
{
log_level = level;
if (func)
lwsl_emit = func;
}
LWS_VISIBLE int lwsl_visible(int level)
{
return log_level & level;
}
LWS_VISIBLE int
lws_is_ssl(struct lws *wsi)
{
#ifdef LWS_OPENSSL_SUPPORT
return wsi->use_ssl;
#else
(void)wsi;
return 0;
#endif
}
#ifdef LWS_OPENSSL_SUPPORT
LWS_VISIBLE SSL*
lws_get_ssl(struct lws *wsi)
{
return wsi->ssl;
}
#endif
LWS_VISIBLE int
lws_partial_buffered(struct lws *wsi)
{
return !!wsi->trunc_len;
}
void lws_set_protocol_write_pending(struct lws *wsi,
enum lws_pending_protocol_send pend)
{
lwsl_info("setting pps %d\n", pend);
if (wsi->pps)
lwsl_err("pps overwrite\n");
wsi->pps = pend;
lws_rx_flow_control(wsi, 0);
lws_callback_on_writable(wsi);
}
LWS_VISIBLE size_t
lws_get_peer_write_allowance(struct lws *wsi)
{
#ifdef LWS_USE_HTTP2
/* only if we are using HTTP2 on this connection */
if (wsi->mode != LWSCM_HTTP2_SERVING)
return -1;
/* user is only interested in how much he can send, or that he can't */
if (wsi->u.http2.tx_credit <= 0)
return 0;
return wsi->u.http2.tx_credit;
#else
(void)wsi;
return -1;
#endif
}
LWS_VISIBLE void
lws_union_transition(struct lws *wsi, enum connection_mode mode)
{
lwsl_debug("%s: %p: mode %d\n", __func__, wsi, mode);
memset(&wsi->u, 0, sizeof(wsi->u));
wsi->mode = mode;
}
LWS_VISIBLE struct lws_plat_file_ops *
lws_get_fops(struct lws_context *context)
{
return &context->fops;
}
LWS_VISIBLE LWS_EXTERN struct lws_context *
lws_get_context(const struct lws *wsi)
{
return wsi->context;
}
LWS_VISIBLE LWS_EXTERN int
lws_get_count_threads(struct lws_context *context)
{
return context->count_threads;
}
LWS_VISIBLE LWS_EXTERN void *
lws_wsi_user(struct lws *wsi)
{
return wsi->user_space;
}
LWS_VISIBLE LWS_EXTERN struct lws *
lws_get_parent(const struct lws *wsi)
{
return wsi->parent;
}
LWS_VISIBLE LWS_EXTERN struct lws *
lws_get_child(const struct lws *wsi)
{
return wsi->child_list;
}
LWS_VISIBLE LWS_EXTERN void
lws_close_reason(struct lws *wsi, enum lws_close_status status,
unsigned char *buf, size_t len)
{
unsigned char *p, *start;
int budget = sizeof(wsi->u.ws.ping_payload_buf) - LWS_PRE;
assert(wsi->mode == LWSCM_WS_SERVING || wsi->mode == LWSCM_WS_CLIENT);
start = p = &wsi->u.ws.ping_payload_buf[LWS_PRE];
*p++ = (((int)status) >> 8) & 0xff;
*p++ = ((int)status) & 0xff;
if (buf)
while (len-- && p < start + budget)
*p++ = *buf++;
wsi->u.ws.close_in_ping_buffer_len = p - start;
}
LWS_EXTERN int
_lws_rx_flow_control(struct lws *wsi)
{
/* there is no pending change */
if (!(wsi->rxflow_change_to & LWS_RXFLOW_PENDING_CHANGE)) {
lwsl_debug("%s: no pending change\n", __func__);
return 0;
}
/* stuff is still buffered, not ready to really accept new input */
if (wsi->rxflow_buffer) {
/* get ourselves called back to deal with stashed buffer */
lws_callback_on_writable(wsi);
return 0;
}
/* pending is cleared, we can change rxflow state */
wsi->rxflow_change_to &= ~LWS_RXFLOW_PENDING_CHANGE;
lwsl_info("rxflow: wsi %p change_to %d\n", wsi,
wsi->rxflow_change_to & LWS_RXFLOW_ALLOW);
/* adjust the pollfd for this wsi */
if (wsi->rxflow_change_to & LWS_RXFLOW_ALLOW) {
if (lws_change_pollfd(wsi, 0, LWS_POLLIN)) {
lwsl_info("%s: fail\n", __func__);
return -1;
}
} else
if (lws_change_pollfd(wsi, LWS_POLLIN, 0))
return -1;
return 0;
}
LWS_EXTERN int
lws_check_utf8(unsigned char *state, unsigned char *buf, size_t len)
{
static const unsigned char e0f4[] = {
0xa0 | ((2 - 1) << 2) | 1, /* e0 */
0x80 | ((4 - 1) << 2) | 1, /* e1 */
0x80 | ((4 - 1) << 2) | 1, /* e2 */
0x80 | ((4 - 1) << 2) | 1, /* e3 */
0x80 | ((4 - 1) << 2) | 1, /* e4 */
0x80 | ((4 - 1) << 2) | 1, /* e5 */
0x80 | ((4 - 1) << 2) | 1, /* e6 */
0x80 | ((4 - 1) << 2) | 1, /* e7 */
0x80 | ((4 - 1) << 2) | 1, /* e8 */
0x80 | ((4 - 1) << 2) | 1, /* e9 */
0x80 | ((4 - 1) << 2) | 1, /* ea */
0x80 | ((4 - 1) << 2) | 1, /* eb */
0x80 | ((4 - 1) << 2) | 1, /* ec */
0x80 | ((2 - 1) << 2) | 1, /* ed */
0x80 | ((4 - 1) << 2) | 1, /* ee */
0x80 | ((4 - 1) << 2) | 1, /* ef */
0x90 | ((3 - 1) << 2) | 2, /* f0 */
0x80 | ((4 - 1) << 2) | 2, /* f1 */
0x80 | ((4 - 1) << 2) | 2, /* f2 */
0x80 | ((4 - 1) << 2) | 2, /* f3 */
0x80 | ((1 - 1) << 2) | 2, /* f4 */
0, /* s0 */
0x80 | ((4 - 1) << 2) | 0, /* s2 */
0x80 | ((4 - 1) << 2) | 1, /* s3 */
};
unsigned char s = *state;
while (len--) {
unsigned char c = *buf++;
if (!s) {
if (c >= 0x80) {
if (c < 0xc2 || c > 0xf4)
return 1;
if (c < 0xe0)
s = 0x80 | ((4 - 1) << 2);
else
s = e0f4[c - 0xe0];
}
} else {
if (c < (s & 0xf0) ||
c >= (s & 0xf0) + 0x10 + ((s << 2) & 0x30))
return 1;
s = e0f4[21 + (s & 3)];
}
}
*state = s;
return 0;
}
LWS_VISIBLE LWS_EXTERN int
lws_parse_uri(char *p, const char **prot, const char **ads, int *port,
const char **path)
{
const char *end;
static const char *slash = "/";
/* cut up the location into address, port and path */
*prot = p;
while (*p && (*p != ':' || p[1] != '/' || p[2] != '/'))
p++;
if (!*p) {
end = p;
p = (char *)*prot;
*prot = end;
} else {
*p = '\0';
p += 3;
}
*ads = p;
if (!strcmp(*prot, "http") || !strcmp(*prot, "ws"))
*port = 80;
else if (!strcmp(*prot, "https") || !strcmp(*prot, "wss"))
*port = 443;
while (*p && *p != ':' && *p != '/')
p++;
if (*p == ':') {
*p++ = '\0';
*port = atoi(p);
while (*p && *p != '/')
p++;
}
*path = slash;
if (*p) {
*p++ = '\0';
if (*p)
*path = p;
}
return 0;
}
#ifdef LWS_NO_EXTENSIONS
/* we need to provide dummy callbacks for internal exts
* so user code runs when faced with a lib compiled with
* extensions disabled.
*/
int
lws_extension_callback_pm_deflate(struct lws_context *context,
const struct lws_extension *ext,
struct lws *wsi,
enum lws_extension_callback_reasons reason,
void *user, void *in, size_t len)
{
(void)context;
(void)ext;
(void)wsi;
(void)reason;
(void)user;
(void)in;
(void)len;
return 0;
}
#endif
LWS_EXTERN int
lws_socket_bind(struct lws_vhost *vhost, lws_sockfd_type sockfd, int port,
const char *iface)
{
#if LWS_POSIX
#ifdef LWS_USE_UNIX_SOCK
struct sockaddr_un serv_unix;
#endif
#ifdef LWS_USE_IPV6
struct sockaddr_in6 serv_addr6;
#endif
struct sockaddr_in serv_addr4;
#ifndef LWS_PLAT_OPTEE
socklen_t len = sizeof(struct sockaddr);
#endif
int n;
struct sockaddr_in sin;
struct sockaddr *v;
#ifdef LWS_USE_UNIX_SOCK
if (LWS_UNIX_SOCK_ENABLED(vhost)) {
v = (struct sockaddr *)&serv_unix;
n = sizeof(struct sockaddr_un);
bzero((char *) &serv_unix, sizeof(serv_unix));
serv_unix.sun_family = AF_UNIX;
if (sizeof(serv_unix.sun_path) <= strlen(iface)) {
lwsl_err("\"%s\" too long for UNIX domain socket\n",
iface);
return -1;
}
strcpy(serv_unix.sun_path, iface);
if (serv_unix.sun_path[0] == '@')
serv_unix.sun_path[0] = '\0';
} else
#endif
#ifdef LWS_USE_IPV6
if (LWS_IPV6_ENABLED(vhost)) {
v = (struct sockaddr *)&serv_addr6;
n = sizeof(struct sockaddr_in6);
bzero((char *) &serv_addr6, sizeof(serv_addr6));
if (iface &&
interface_to_sa(vhost, iface,
(struct sockaddr_in *)v, n) < 0) {
lwsl_err("Unable to find interface %s\n", iface);
return -1;
}
if (iface) {
struct ifaddrs *addrs, *addr;
char ip[NI_MAXHOST];
unsigned int i;
getifaddrs(&addrs);
for (addr = addrs; addr; addr = addr->ifa_next) {
if (!addr->ifa_addr ||
addr->ifa_addr->sa_family != AF_INET6)
continue;
getnameinfo(addr->ifa_addr,
sizeof(struct sockaddr_in6),
ip, sizeof(ip),
NULL, 0, NI_NUMERICHOST);
i = 0;
while (ip[i])
if (ip[i++] == '%') {
ip[i - 1] = '\0';
break;
}
if (!strcmp(ip, iface)) {
serv_addr6.sin6_scope_id =
if_nametoindex(addr->ifa_name);
break;
}
}
freeifaddrs(addrs);
}
serv_addr6.sin6_family = AF_INET6;
serv_addr6.sin6_port = htons(port);
} else
#endif
{
v = (struct sockaddr *)&serv_addr4;
n = sizeof(serv_addr4);
bzero((char *) &serv_addr4, sizeof(serv_addr4));
serv_addr4.sin_addr.s_addr = INADDR_ANY;
serv_addr4.sin_family = AF_INET;
if (iface &&
interface_to_sa(vhost, iface,
(struct sockaddr_in *)v, n) < 0) {
lwsl_err("Unable to find interface %s\n", iface);
return -1;
}
serv_addr4.sin_port = htons(port);
} /* ipv4 */
n = bind(sockfd, v, n);
#ifdef LWS_USE_UNIX_SOCK
if (n < 0 && LWS_UNIX_SOCK_ENABLED(vhost)) {
lwsl_err("ERROR on binding fd %d to \"%s\" (%d %d)\n",
sockfd, iface, n, LWS_ERRNO);
return -1;
} else
#endif
if (n < 0) {
lwsl_err("ERROR on binding fd %d to port %d (%d %d)\n",
sockfd, port, n, LWS_ERRNO);
return -1;
}
#ifndef LWS_PLAT_OPTEE
if (getsockname(sockfd, (struct sockaddr *)&sin, &len) == -1)
lwsl_warn("getsockname: %s\n", strerror(LWS_ERRNO));
else
#endif
port = ntohs(sin.sin_port);
#endif
return port;
}
LWS_EXTERN void
lws_restart_ws_ping_pong_timer(struct lws *wsi)
{
if (!wsi->context->ws_ping_pong_interval)
return;
if (wsi->state != LWSS_ESTABLISHED)
return;
wsi->u.ws.time_next_ping_check = (time_t)lws_now_secs() +
wsi->context->ws_ping_pong_interval;
}
static const char *hex = "0123456789ABCDEF";
LWS_VISIBLE LWS_EXTERN const char *
lws_sql_purify(char *escaped, const char *string, int len)
{
const char *p = string;
char *q = escaped;
while (*p && len-- > 2) {
if (*p == '\'') {
*q++ = '\'';
*q++ = '\'';
len --;
p++;
} else
*q++ = *p++;
}
*q = '\0';
return escaped;
}
LWS_VISIBLE LWS_EXTERN const char *
lws_json_purify(char *escaped, const char *string, int len)
{
const char *p = string;
char *q = escaped;
if (!p) {
escaped[0] = '\0';
return escaped;
}
while (*p && len-- > 6) {
if (*p == '\"' || *p == '\\' || *p < 0x20) {
*q++ = '\\';
*q++ = 'u';
*q++ = '0';
*q++ = '0';
*q++ = hex[((*p) >> 4) & 15];
*q++ = hex[(*p) & 15];
len -= 5;
p++;
} else
*q++ = *p++;
}
*q = '\0';
return escaped;
}
LWS_VISIBLE LWS_EXTERN const char *
lws_urlencode(char *escaped, const char *string, int len)
{
const char *p = string;
char *q = escaped;
while (*p && len-- > 3) {
if (*p == ' ') {
*q++ = '+';
p++;
continue;
}
if ((*p >= '0' && *p <= '9') ||
(*p >= 'A' && *p <= 'Z') ||
(*p >= 'a' && *p <= 'z')) {
*q++ = *p++;
continue;
}
*q++ = '%';
*q++ = hex[(*p >> 4) & 0xf];
*q++ = hex[*p & 0xf];
len -= 2;
p++;
}
*q = '\0';
return escaped;
}
LWS_VISIBLE LWS_EXTERN int
lws_urldecode(char *string, const char *escaped, int len)
{
int state = 0, n;
char sum = 0;
while (*escaped && len) {
switch (state) {
case 0:
if (*escaped == '%') {
state++;
escaped++;
continue;
}
if (*escaped == '+') {
escaped++;
*string++ = ' ';
len--;
continue;
}
*string++ = *escaped++;
len--;
break;
case 1:
n = char_to_hex(*escaped);
if (n < 0)
return -1;
escaped++;
sum = n << 4;
state++;
break;
case 2:
n = char_to_hex(*escaped);
if (n < 0)
return -1;
escaped++;
*string++ = sum | n;
len--;
state = 0;
break;
}
}
*string = '\0';
return 0;
}
LWS_VISIBLE LWS_EXTERN int
lws_finalize_startup(struct lws_context *context)
{
struct lws_context_creation_info info;
info.uid = context->uid;
info.gid = context->gid;
if (lws_check_opt(context->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS))
lws_plat_drop_app_privileges(&info);
return 0;
}
int
lws_snprintf(char *str, size_t size, const char *format, ...)
{
va_list ap;
int n;
if (!size)
return 0;
va_start(ap, format);
n = vsnprintf(str, size, format, ap);
va_end(ap);
if (n >= size)
return size;
return n;
}
LWS_VISIBLE LWS_EXTERN int
lws_is_cgi(struct lws *wsi) {
#ifdef LWS_WITH_CGI
return !!wsi->cgi;
#else
return 0;
#endif
}
#ifdef LWS_WITH_CGI
static int
urlencode(const char *in, int inlen, char *out, int outlen)
{
char *start = out, *end = out + outlen;
while (inlen-- && out < end - 4) {
if ((*in >= 'A' && *in <= 'Z') ||
(*in >= 'a' && *in <= 'z') ||
(*in >= '0' && *in <= '9') ||
*in == '-' ||
*in == '_' ||
*in == '.' ||
*in == '~') {
*out++ = *in++;
continue;
}
if (*in == ' ') {
*out++ = '+';
in++;
continue;
}
*out++ = '%';
*out++ = hex[(*in) >> 4];
*out++ = hex[(*in++) & 15];
}
*out = '\0';
if (out >= end - 4)
return -1;
return out - start;
}
static struct lws *
lws_create_basic_wsi(struct lws_context *context, int tsi)
{
struct lws *new_wsi;
if ((unsigned int)context->pt[tsi].fds_count ==
context->fd_limit_per_thread - 1) {
lwsl_err("no space for new conn\n");
return NULL;
}
new_wsi = lws_zalloc(sizeof(struct lws));
if (new_wsi == NULL) {
lwsl_err("Out of memory for new connection\n");
return NULL;
}
new_wsi->tsi = tsi;
new_wsi->context = context;
new_wsi->pending_timeout = NO_PENDING_TIMEOUT;
new_wsi->rxflow_change_to = LWS_RXFLOW_ALLOW;
/* initialize the instance struct */
new_wsi->state = LWSS_CGI;
new_wsi->mode = LWSCM_CGI;
new_wsi->hdr_parsing_completed = 0;
new_wsi->position_in_fds_table = -1;
/*
* these can only be set once the protocol is known
* we set an unestablished connection's protocol pointer
* to the start of the defauly vhost supported list, so it can look
* for matching ones during the handshake
*/
new_wsi->protocol = context->vhost_list->protocols;
new_wsi->user_space = NULL;
new_wsi->ietf_spec_revision = 0;
new_wsi->sock = LWS_SOCK_INVALID;
context->count_wsi_allocated++;
return new_wsi;
}
LWS_VISIBLE LWS_EXTERN int
lws_cgi(struct lws *wsi, const char * const *exec_array, int script_uri_path_len,
int timeout_secs, const struct lws_protocol_vhost_options *mp_cgienv)
{
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
char *env_array[30], cgi_path[400], e[1024], *p = e,
*end = p + sizeof(e) - 1, tok[256], *t;
struct lws_cgi *cgi;
int n, m, i, uritok = -1;
/*
* give the master wsi a cgi struct
*/
wsi->cgi = lws_zalloc(sizeof(*wsi->cgi));
if (!wsi->cgi) {
lwsl_err("%s: OOM\n", __func__);
return -1;
}
cgi = wsi->cgi;
cgi->wsi = wsi; /* set cgi's owning wsi */
/* create pipes for [stdin|stdout] and [stderr] */
for (n = 0; n < 3; n++)
if (pipe(cgi->pipe_fds[n]) == -1)
goto bail1;
/* create cgi wsis for each stdin/out/err fd */
for (n = 0; n < 3; n++) {
cgi->stdwsi[n] = lws_create_basic_wsi(wsi->context, wsi->tsi);
if (!cgi->stdwsi[n])
goto bail2;
cgi->stdwsi[n]->cgi_channel = n;
cgi->stdwsi[n]->vhost = wsi->vhost;
// lwsl_err("%s: cgi %p: pipe fd %d -> fd %d / %d\n", __func__, wsi, n,
// cgi->pipe_fds[n][!!(n == 0)], cgi->pipe_fds[n][!(n == 0)]);
/* read side is 0, stdin we want the write side, others read */
cgi->stdwsi[n]->sock = cgi->pipe_fds[n][!!(n == 0)];
if (fcntl(cgi->pipe_fds[n][!!(n == 0)], F_SETFL, O_NONBLOCK) < 0) {
lwsl_err("%s: setting NONBLOCK failed\n", __func__);
goto bail2;
}
}
for (n = 0; n < 3; n++) {
lws_libuv_accept(cgi->stdwsi[n], cgi->stdwsi[n]->sock);
if (insert_wsi_socket_into_fds(wsi->context, cgi->stdwsi[n]))
goto bail3;
cgi->stdwsi[n]->parent = wsi;
cgi->stdwsi[n]->sibling_list = wsi->child_list;
wsi->child_list = cgi->stdwsi[n];
}
lws_change_pollfd(cgi->stdwsi[LWS_STDIN], LWS_POLLIN, LWS_POLLOUT);
lws_change_pollfd(cgi->stdwsi[LWS_STDOUT], LWS_POLLOUT, LWS_POLLIN);
lws_change_pollfd(cgi->stdwsi[LWS_STDERR], LWS_POLLOUT, LWS_POLLIN);
lwsl_debug("%s: fds in %d, out %d, err %d\n", __func__,
cgi->stdwsi[LWS_STDIN]->sock, cgi->stdwsi[LWS_STDOUT]->sock,
cgi->stdwsi[LWS_STDERR]->sock);
lws_set_timeout(wsi, PENDING_TIMEOUT_CGI, timeout_secs);
/* the cgi stdout is always sending us http1.x header data first */
wsi->hdr_state = LCHS_HEADER;
/* add us to the pt list of active cgis */
lwsl_debug("%s: adding cgi %p to list\n", __func__, wsi->cgi);
cgi->cgi_list = pt->cgi_list;
pt->cgi_list = cgi;
/* prepare his CGI env */
n = 0;
if (lws_is_ssl(wsi))
env_array[n++] = "HTTPS=ON";
if (wsi->u.hdr.ah) {
static const unsigned char meths[] = {
WSI_TOKEN_GET_URI,
WSI_TOKEN_POST_URI,
WSI_TOKEN_OPTIONS_URI,
WSI_TOKEN_PUT_URI,
WSI_TOKEN_PATCH_URI,
WSI_TOKEN_DELETE_URI,
};
static const char * const meth_names[] = {
"GET", "POST", "OPTIONS", "PUT", "PATCH", "DELETE",
};
for (m = 0; m < ARRAY_SIZE(meths); m++)
if (lws_hdr_total_length(wsi, meths[m]) >=
script_uri_path_len) {
uritok = meths[m];
break;
}
if (uritok < 0)
goto bail3;
lws_snprintf(cgi_path, sizeof(cgi_path) - 1, "REQUEST_URI=%s",
lws_hdr_simple_ptr(wsi, uritok));
cgi_path[sizeof(cgi_path) - 1] = '\0';
env_array[n++] = cgi_path;
env_array[n++] = p;
p += lws_snprintf(p, end - p, "REQUEST_METHOD=%s",
meth_names[m]);
p++;
env_array[n++] = p;
p += lws_snprintf(p, end - p, "QUERY_STRING=");
/* dump the individual URI Arg parameters */
m = 0;
while (1) {
i = lws_hdr_copy_fragment(wsi, tok, sizeof(tok),
WSI_TOKEN_HTTP_URI_ARGS, m);
if (i < 0)
break;
t = tok;
while (*t && *t != '=' && p < end - 4)
*p++ = *t++;
if (*t == '=')
*p++ = *t++;
i = urlencode(t, i- (t - tok), p, end - p);
if (i > 0) {
p += i;
*p++ = '&';
}
m++;
}
if (m)
p--;
*p++ = '\0';
env_array[n++] = p;
p += lws_snprintf(p, end - p, "PATH_INFO=%s",
lws_hdr_simple_ptr(wsi, uritok) +
script_uri_path_len);
p++;
}
if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_REFERER)) {
env_array[n++] = p;
p += lws_snprintf(p, end - p, "HTTP_REFERER=%s",
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_REFERER));
p++;
}
if (lws_hdr_total_length(wsi, WSI_TOKEN_HOST)) {
env_array[n++] = p;
p += lws_snprintf(p, end - p, "HTTP_HOST=%s",
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST));
p++;
}
if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_COOKIE)) {
env_array[n++] = p;
p += lws_snprintf(p, end - p, "HTTP_COOKIE=%s",
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_COOKIE));
p++;
}
if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_USER_AGENT)) {
env_array[n++] = p;
p += lws_snprintf(p, end - p, "USER_AGENT=%s",
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_USER_AGENT));
p++;
}
if (uritok == WSI_TOKEN_POST_URI) {
if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE)) {
env_array[n++] = p;
p += lws_snprintf(p, end - p, "CONTENT_TYPE=%s",
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE));
p++;
}
if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_CONTENT_LENGTH)) {
env_array[n++] = p;
p += lws_snprintf(p, end - p, "CONTENT_LENGTH=%s",
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_CONTENT_LENGTH));
p++;
}
}
env_array[n++] = p;
p += lws_snprintf(p, end - p, "SCRIPT_PATH=%s", exec_array[0]) + 1;
while (mp_cgienv) {
env_array[n++] = p;
p += lws_snprintf(p, end - p, "%s=%s", mp_cgienv->name,
mp_cgienv->value);
lwsl_debug(" Applying mount-specific cgi env '%s'\n",
env_array[n - 1]);
p++;
mp_cgienv = mp_cgienv->next;
}
env_array[n++] = "SERVER_SOFTWARE=libwebsockets";
env_array[n++] = "PATH=/bin:/usr/bin:/usr/local/bin:/var/www/cgi-bin";
env_array[n] = NULL;
#if 0
for (m = 0; m < n; m++)
lwsl_err(" %s\n", env_array[m]);
#endif
/*
* Actually having made the env, as a cgi we don't need the ah
* any more
*/
if (wsi->u.hdr.ah->rxpos == wsi->u.hdr.ah->rxlen)
lws_header_table_detach(wsi, 0);
/* we are ready with the redirection pipes... run the thing */
#if !defined(LWS_HAVE_VFORK) || !defined(LWS_HAVE_EXECVPE)
cgi->pid = fork();
#else
cgi->pid = vfork();
#endif
if (cgi->pid < 0) {
lwsl_err("fork failed, errno %d", errno);
goto bail3;
}
#if defined(__linux__)
prctl(PR_SET_PDEATHSIG, SIGTERM);
#endif
setpgrp(); /* stops on-daemonized main processess getting SIGINT from TTY */
if (cgi->pid) {
/* we are the parent process */
wsi->context->count_cgi_spawned++;
lwsl_debug("%s: cgi %p spawned PID %d\n", __func__, cgi, cgi->pid);
return 0;
}
/* somewhere we can at least read things and enter it */
if (chdir("/tmp"))
lwsl_notice("%s: Failed to chdir\n", __func__);
/* We are the forked process, redirect and kill inherited things.
*
* Because of vfork(), we cannot do anything that changes pages in
* the parent environment. Stuff that changes kernel state for the
* process is OK. Stuff that happens after the execvpe() is OK.
*/
for (n = 0; n < 3; n++)
if (dup2(cgi->pipe_fds[n][!(n == 0)], n) < 0) {
lwsl_err("%s: stdin dup2 failed\n", __func__);
goto bail3;
}
#if !defined(LWS_HAVE_VFORK) || !defined(LWS_HAVE_EXECVPE)
for (m = 0; m < n; m++) {
p = strchr(env_array[m], '=');
*p++ = '\0';
setenv(env_array[m], p, 1);
}
execvp(exec_array[0], (char * const *)&exec_array[0]);
#else
execvpe(exec_array[0], (char * const *)&exec_array[0], &env_array[0]);
#endif
exit(1);
bail3:
/* drop us from the pt cgi list */
pt->cgi_list = cgi->cgi_list;
while (--n >= 0)
remove_wsi_socket_from_fds(wsi->cgi->stdwsi[n]);
bail2:
for (n = 0; n < 3; n++)
if (wsi->cgi->stdwsi[n])
lws_free_wsi(cgi->stdwsi[n]);
bail1:
for (n = 0; n < 3; n++) {
if (cgi->pipe_fds[n][0])
close(cgi->pipe_fds[n][0]);
if (cgi->pipe_fds[n][1])
close(cgi->pipe_fds[n][1]);
}
lws_free_set_NULL(wsi->cgi);
lwsl_err("%s: failed\n", __func__);
return -1;
}
LWS_VISIBLE LWS_EXTERN int
lws_cgi_write_split_stdout_headers(struct lws *wsi)
{
int n, m, match = 0, lp = 0;
static const char * const content_length = "content-length: ";
char buf[LWS_PRE + 1024], *start = &buf[LWS_PRE], *p = start,
*end = &buf[sizeof(buf) - 1 - LWS_PRE], c, l[12];
if (!wsi->cgi)
return -1;
while (wsi->hdr_state != LHCS_PAYLOAD) {
/* we have to separate header / finalize and
* payload chunks, since they need to be
* handled separately
*/
n = read(lws_get_socket_fd(wsi->cgi->stdwsi[LWS_STDOUT]), &c, 1);
if (n < 0) {
if (errno != EAGAIN) {
lwsl_debug("%s: read says %d\n", __func__, n);
return -1;
}
else
n = 0;
}
if (n) {
lwsl_debug("-- 0x%02X %c\n", (unsigned char)c, c);
switch (wsi->hdr_state) {
case LCHS_HEADER:
if (!content_length[match] &&
(c >= '0' && c <= '9') &&
lp < sizeof(l) - 1) {
l[lp++] = c;
l[lp] = '\0';
wsi->cgi->content_length = atol(l);
}
if (tolower(c) == content_length[match])
match++;
else
match = 0;
/* some cgi only send us \x0a for EOL */
if (c == '\x0a') {
wsi->hdr_state = LCHS_SINGLE_0A;
*p++ = '\x0d';
}
*p++ = c;
if (c == '\x0d') {
wsi->hdr_state = LCHS_LF1;
break;
}
break;
case LCHS_LF1:
*p++ = c;
if (c == '\x0a') {
wsi->hdr_state = LCHS_CR2;
break;
}
/* we got \r[^\n]... it's unreasonable */
lwsl_debug("%s: funny CRLF 0x%02X\n", __func__, (unsigned char)c);
return -1;
case LCHS_CR2:
if (c == '\x0d') {
/* drop the \x0d */
wsi->hdr_state = LCHS_LF2;
break;
}
wsi->hdr_state = LCHS_HEADER;
match = 0;
*p++ = c;
break;
case LCHS_LF2:
case LCHS_SINGLE_0A:
m = wsi->hdr_state;
if (c == '\x0a') {
lwsl_debug("Content-Length: %ld\n", wsi->cgi->content_length);
wsi->hdr_state = LHCS_PAYLOAD;
/* drop the \0xa ... finalize will add it if needed */
if (lws_finalize_http_header(wsi,
(unsigned char **)&p,
(unsigned char *)end))
return -1;
break;
}
if (m == LCHS_LF2)
/* we got \r\n\r[^\n]... it's unreasonable */
return -1;
/* we got \x0anext header, it's reasonable */
*p++ = c;
wsi->hdr_state = LCHS_HEADER;
break;
case LHCS_PAYLOAD:
break;
}
}
/* ran out of input, ended the headers, or filled up the headers buf */
if (!n || wsi->hdr_state == LHCS_PAYLOAD || (p + 4) == end) {
m = lws_write(wsi, (unsigned char *)start,
p - start, LWS_WRITE_HTTP_HEADERS);
if (m < 0) {
lwsl_debug("%s: write says %d\n", __func__, m);
return -1;
}
/* writeability becomes uncertain now we wrote
* something, we must return to the event loop
*/
return 0;
}
}
n = read(lws_get_socket_fd(wsi->cgi->stdwsi[LWS_STDOUT]),
start, sizeof(buf) - LWS_PRE);
if (n < 0 && errno != EAGAIN) {
lwsl_debug("%s: stdout read says %d\n", __func__, n);
return -1;
}
if (n > 0) {
m = lws_write(wsi, (unsigned char *)start, n, LWS_WRITE_HTTP);
//lwsl_notice("write %d\n", m);
if (m < 0) {
lwsl_debug("%s: stdout write says %d\n", __func__, m);
return -1;
}
wsi->cgi->content_length_seen += m;
}
return 0;
}
LWS_VISIBLE LWS_EXTERN int
lws_cgi_kill(struct lws *wsi)
{
struct lws_cgi_args args;
int status, n;
lwsl_debug("%s: %p\n", __func__, wsi);
if (!wsi->cgi)
return 0;
if (wsi->cgi->pid > 0) {
n = waitpid(wsi->cgi->pid, &status, WNOHANG);
if (n > 0) {
lwsl_debug("%s: PID %d reaped\n", __func__,
wsi->cgi->pid);
goto handled;
}
/* kill the process group */
n = kill(-wsi->cgi->pid, SIGTERM);
lwsl_debug("%s: SIGTERM child PID %d says %d (errno %d)\n", __func__,
wsi->cgi->pid, n, errno);
if (n < 0) {
/*
* hum seen errno=3 when process is listed in ps,
* it seems we don't always retain process grouping
*
* Direct these fallback attempt to the exact child
*/
n = kill(wsi->cgi->pid, SIGTERM);
if (n < 0) {
n = kill(wsi->cgi->pid, SIGPIPE);
if (n < 0) {
n = kill(wsi->cgi->pid, SIGKILL);
if (n < 0)
lwsl_err("%s: SIGKILL PID %d failed errno %d (maybe zombie)\n",
__func__, wsi->cgi->pid, errno);
}
}
}
/* He could be unkillable because he's a zombie */
n = 1;
while (n > 0) {
n = waitpid(-wsi->cgi->pid, &status, WNOHANG);
if (n > 0)
lwsl_debug("%s: reaped PID %d\n", __func__, n);
if (n <= 0) {
n = waitpid(wsi->cgi->pid, &status, WNOHANG);
if (n > 0)
lwsl_debug("%s: reaped PID %d\n", __func__, n);
}
}
}
handled:
args.stdwsi = &wsi->cgi->stdwsi[0];
if (wsi->cgi->pid != -1 && user_callback_handle_rxflow(
wsi->protocol->callback,
wsi, LWS_CALLBACK_CGI_TERMINATED,
wsi->user_space,
(void *)&args, 0)) {
wsi->cgi->pid = -1;
if (!wsi->cgi->being_closed)
lws_close_free_wsi(wsi, 0);
}
return 0;
}
LWS_EXTERN int
lws_cgi_kill_terminated(struct lws_context_per_thread *pt)
{
struct lws_cgi **pcgi, *cgi = NULL;
int status, n = 1;
while (n > 0) {
/* find finished guys but don't reap yet */
n = waitpid(-1, &status, WNOHANG);
if (n <= 0)
continue;
lwsl_debug("%s: observed PID %d terminated\n", __func__, n);
pcgi = &pt->cgi_list;
/* check all the subprocesses on the cgi list */
while (*pcgi) {
/* get the next one first as list may change */
cgi = *pcgi;
pcgi = &(*pcgi)->cgi_list;
if (cgi->pid <= 0)
continue;
/* wait for stdout to be drained */
if (cgi->content_length > cgi->content_length_seen)
continue;
if (cgi->content_length) {
lwsl_debug("%s: wsi %p: expected content length seen: %ld\n",
__func__, cgi->wsi, cgi->content_length_seen);
}
/* reap it */
waitpid(n, &status, WNOHANG);
/*
* he's already terminated so no need for kill()
* but we should do the terminated cgi callback
* and close him if he's not already closing
*/
if (n == cgi->pid) {
lwsl_debug("%s: found PID %d on cgi list\n",
__func__, n);
if (!cgi->content_length) {
/*
* well, if he sends chunked... give him 5s after the
* cgi terminated to send buffered
*/
cgi->chunked_grace++;
continue;
}
/* defeat kill() */
cgi->pid = 0;
lws_cgi_kill(cgi->wsi);
break;
}
cgi = NULL;
}
/* if not found on the cgi list, as he's one of ours, reap */
if (!cgi) {
lwsl_debug("%s: reading PID %d although no cgi match\n",
__func__, n);
waitpid(n, &status, WNOHANG);
}
}
/* disable this to confirm timeout cgi cleanup flow */
#if 1
pcgi = &pt->cgi_list;
/* check all the subprocesses on the cgi list */
while (*pcgi) {
/* get the next one first as list may change */
cgi = *pcgi;
pcgi = &(*pcgi)->cgi_list;
if (cgi->pid <= 0)
continue;
/* we deferred killing him after reaping his PID */
if (cgi->chunked_grace) {
cgi->chunked_grace++;
if (cgi->chunked_grace < 5)
continue;
goto finish_him;
}
/* wait for stdout to be drained */
if (cgi->content_length > cgi->content_length_seen)
continue;
if (cgi->content_length)
lwsl_debug("%s: wsi %p: expected content length seen: %ld\n",
__func__, cgi->wsi, cgi->content_length_seen);
/* reap it */
if (waitpid(cgi->pid, &status, WNOHANG) > 0) {
if (!cgi->content_length) {
/*
* well, if he sends chunked... give him 5s after the
* cgi terminated to send buffered
*/
cgi->chunked_grace++;
continue;
}
finish_him:
lwsl_debug("%s: found PID %d on cgi list\n",
__func__, cgi->pid);
/* defeat kill() */
cgi->pid = 0;
lws_cgi_kill(cgi->wsi);
break;
}
}
#endif
/* general anti zombie defence */
// n = waitpid(-1, &status, WNOHANG);
//if (n > 0)
// lwsl_notice("%s: anti-zombie wait says %d\n", __func__, n);
return 0;
}
#endif
#ifdef LWS_NO_EXTENSIONS
LWS_EXTERN int
lws_set_extension_option(struct lws *wsi, const char *ext_name,
const char *opt_name, const char *opt_val)
{
return -1;
}
#endif
#ifdef LWS_WITH_ACCESS_LOG
int
lws_access_log(struct lws *wsi)
{
char *p = wsi->access_log.user_agent, ass[512];
int l;
if (!wsi->access_log_pending)
return 0;
if (!wsi->access_log.header_log)
return 0;
if (!p)
p = "";
l = lws_snprintf(ass, sizeof(ass) - 1, "%s %d %lu %s\n",
wsi->access_log.header_log,
wsi->access_log.response, wsi->access_log.sent, p);
if (wsi->vhost->log_fd != (int)LWS_INVALID_FILE) {
if (write(wsi->vhost->log_fd, ass, l) != l)
lwsl_err("Failed to write log\n");
} else
lwsl_err("%s", ass);
if (wsi->access_log.header_log) {
lws_free(wsi->access_log.header_log);
wsi->access_log.header_log = NULL;
}
if (wsi->access_log.user_agent) {
lws_free(wsi->access_log.user_agent);
wsi->access_log.user_agent = NULL;
}
wsi->access_log_pending = 0;
return 0;
}
#endif
void
lws_sum_stats(const struct lws_context *ctx, struct lws_conn_stats *cs)
{
const struct lws_vhost *vh = ctx->vhost_list;
while (vh) {
cs->rx += vh->conn_stats.rx;
cs->tx += vh->conn_stats.tx;
cs->conn += vh->conn_stats.conn;
cs->trans += vh->conn_stats.trans;
cs->ws_upg += vh->conn_stats.ws_upg;
cs->http2_upg += vh->conn_stats.http2_upg;
cs->rejected += vh->conn_stats.rejected;
vh = vh->vhost_next;
}
}
#ifdef LWS_WITH_SERVER_STATUS
LWS_EXTERN int
lws_json_dump_vhost(const struct lws_vhost *vh, char *buf, int len)
{
static const char * const prots[] = {
"http://",
"https://",
"file://",
"cgi://",
">http://",
">https://",
"callback://"
};
char *orig = buf, *end = buf + len - 1, first = 1;
int n = 0;
if (len < 100)
return 0;
buf += lws_snprintf(buf, end - buf,
"{\n \"name\":\"%s\",\n"
" \"port\":\"%d\",\n"
" \"use_ssl\":\"%d\",\n"
" \"sts\":\"%d\",\n"
" \"rx\":\"%llu\",\n"
" \"tx\":\"%llu\",\n"
" \"conn\":\"%lu\",\n"
" \"trans\":\"%lu\",\n"
" \"ws_upg\":\"%lu\",\n"
" \"rejected\":\"%lu\",\n"
" \"http2_upg\":\"%lu\""
,
vh->name, vh->listen_port,
#ifdef LWS_OPENSSL_SUPPORT
vh->use_ssl,
#else
0,
#endif
!!(vh->options & LWS_SERVER_OPTION_STS),
vh->conn_stats.rx, vh->conn_stats.tx,
vh->conn_stats.conn, vh->conn_stats.trans,
vh->conn_stats.ws_upg,
vh->conn_stats.rejected,
vh->conn_stats.http2_upg
);
if (vh->mount_list) {
const struct lws_http_mount *m = vh->mount_list;
buf += lws_snprintf(buf, end - buf, ",\n \"mounts\":[");
while (m) {
if (!first)
buf += lws_snprintf(buf, end - buf, ",");
buf += lws_snprintf(buf, end - buf,
"\n {\n \"mountpoint\":\"%s\",\n"
" \"origin\":\"%s%s\",\n"
" \"cache_max_age\":\"%d\",\n"
" \"cache_reuse\":\"%d\",\n"
" \"cache_revalidate\":\"%d\",\n"
" \"cache_intermediaries\":\"%d\"\n"
,
m->mountpoint,
prots[m->origin_protocol],
m->origin,
m->cache_max_age,
m->cache_reusable,
m->cache_revalidate,
m->cache_intermediaries);
if (m->def)
buf += lws_snprintf(buf, end - buf,
",\n \"default\":\"%s\"",
m->def);
buf += lws_snprintf(buf, end - buf, "\n }");
first = 0;
m = m->mount_next;
}
buf += lws_snprintf(buf, end - buf, "\n ]");
}
if (vh->protocols) {
n = 0;
first = 1;
buf += lws_snprintf(buf, end - buf, ",\n \"ws-protocols\":[");
while (n < vh->count_protocols) {
if (!first)
buf += lws_snprintf(buf, end - buf, ",");
buf += lws_snprintf(buf, end - buf,
"\n {\n \"%s\":{\n"
" \"status\":\"ok\"\n }\n }"
,
vh->protocols[n].name);
first = 0;
n++;
}
buf += lws_snprintf(buf, end - buf, "\n ]");
}
buf += lws_snprintf(buf, end - buf, "\n}");
return buf - orig;
}
LWS_EXTERN LWS_VISIBLE int
lws_json_dump_context(const struct lws_context *context, char *buf, int len,
int hide_vhosts)
{
char *orig = buf, *end = buf + len - 1, first = 1;
const struct lws_vhost *vh = context->vhost_list;
const struct lws_context_per_thread *pt;
time_t t = time(NULL);
int n, listening = 0, cgi_count = 0;
struct lws_conn_stats cs;
double d = 0;
#ifdef LWS_WITH_CGI
struct lws_cgi * const *pcgi;
#endif
#ifdef LWS_USE_LIBUV
uv_uptime(&d);
#endif
buf += lws_snprintf(buf, end - buf, "{ "
"\"version\":\"%s\",\n"
"\"uptime\":\"%ld\",\n",
lws_get_library_version(),
(long)d);
#ifdef LWS_HAVE_GETLOADAVG
{
double d[3];
int m;
m = getloadavg(d, 3);
for (n = 0; n < m; n++) {
buf += lws_snprintf(buf, end - buf,
"\"l%d\":\"%.2f\",\n",
n + 1, d[n]);
}
}
#endif
buf += lws_snprintf(buf, end - buf, "\"contexts\":[\n");
buf += lws_snprintf(buf, end - buf, "{ "
"\"context_uptime\":\"%ld\",\n"
"\"cgi_spawned\":\"%d\",\n"
"\"pt_fd_max\":\"%d\",\n"
"\"ah_pool_max\":\"%d\",\n"
"\"deprecated\":\"%d\",\n"
"\"wsi_alive\":\"%d\",\n",
(unsigned long)(t - context->time_up),
context->count_cgi_spawned,
context->fd_limit_per_thread,
context->max_http_header_pool,
context->deprecated,
context->count_wsi_allocated);
buf += lws_snprintf(buf, end - buf, "\"pt\":[\n ");
for (n = 0; n < context->count_threads; n++) {
pt = &context->pt[n];
if (n)
buf += lws_snprintf(buf, end - buf, ",");
buf += lws_snprintf(buf, end - buf,
"\n {\n"
" \"fds_count\":\"%d\",\n"
" \"ah_pool_inuse\":\"%d\",\n"
" \"ah_wait_list\":\"%d\"\n"
" }",
pt->fds_count,
pt->ah_count_in_use,
pt->ah_wait_list_length);
}
buf += lws_snprintf(buf, end - buf, "]");
buf += lws_snprintf(buf, end - buf, ", \"vhosts\":[\n ");
first = 1;
vh = context->vhost_list;
listening = 0;
cs = context->conn_stats;
lws_sum_stats(context, &cs);
while (vh) {
if (!hide_vhosts) {
if (!first)
if(buf != end)
*buf++ = ',';
buf += lws_json_dump_vhost(vh, buf, end - buf);
first = 0;
}
if (vh->lserv_wsi)
listening++;
vh = vh->vhost_next;
}
buf += lws_snprintf(buf, end - buf,
"],\n\"listen_wsi\":\"%d\",\n"
" \"rx\":\"%llu\",\n"
" \"tx\":\"%llu\",\n"
" \"conn\":\"%lu\",\n"
" \"trans\":\"%lu\",\n"
" \"ws_upg\":\"%lu\",\n"
" \"rejected\":\"%lu\",\n"
" \"http2_upg\":\"%lu\"",
listening,
cs.rx, cs.tx, cs.conn, cs.trans,
cs.ws_upg, cs.rejected, cs.http2_upg);
#ifdef LWS_WITH_CGI
for (n = 0; n < context->count_threads; n++) {
pt = &context->pt[n];
pcgi = &pt->cgi_list;
while (*pcgi) {
pcgi = &(*pcgi)->cgi_list;
cgi_count++;
}
}
#endif
buf += lws_snprintf(buf, end - buf, ",\n \"cgi_alive\":\"%d\"\n ",
cgi_count);
buf += lws_snprintf(buf, end - buf, "}");
buf += lws_snprintf(buf, end - buf, "]}\n ");
return buf - orig;
}
#endif