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libwebsockets/lib/server.c
Andy Green 722cc4a366 plugin table dirlisting
2016-07-14 08:57:28 +08:00

2669 lines
63 KiB
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/*
* 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"
int
lws_context_init_server(struct lws_context_creation_info *info,
struct lws_vhost *vhost)
{
#ifdef LWS_POSIX
int n, opt = 1, limit = 1;
#endif
lws_sockfd_type sockfd;
struct lws_vhost *vh;
struct lws *wsi;
int m = 0;
/* set up our external listening socket we serve on */
if (info->port == CONTEXT_PORT_NO_LISTEN)
return 0;
vh = vhost->context->vhost_list;
while (vh) {
if (vh->listen_port == info->port) {
if ((!info->iface && !vh->iface) ||
(info->iface && vh->iface &&
!strcmp(info->iface, vh->iface))) {
vhost->listen_port = info->port;
vhost->iface = info->iface;
lwsl_notice(" using listen skt from vhost %s\n",
vh->name);
return 0;
}
}
vh = vh->vhost_next;
}
#if LWS_POSIX
#if defined(__linux__)
limit = vhost->context->count_threads;
#endif
for (m = 0; m < limit; m++) {
#ifdef LWS_USE_UNIX_SOCK
if (LWS_UNIX_SOCK_ENABLED(vhost))
sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
else
#endif
#ifdef LWS_USE_IPV6
if (LWS_IPV6_ENABLED(vhost))
sockfd = socket(AF_INET6, SOCK_STREAM, 0);
else
#endif
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd == -1) {
#else
sockfd = mbed3_create_tcp_stream_socket();
if (!lws_sockfd_valid(sockfd)) {
#endif
lwsl_err("ERROR opening socket\n");
return 1;
}
#if LWS_POSIX
/*
* allow us to restart even if old sockets in TIME_WAIT
*/
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
(const void *)&opt, sizeof(opt)) < 0) {
compatible_close(sockfd);
return 1;
}
#if defined(LWS_USE_IPV6) && defined(IPV6_V6ONLY)
if (LWS_IPV6_ENABLED(vhost)) {
if (vhost->options & LWS_SERVER_OPTION_IPV6_V6ONLY_MODIFY) {
int value = (vhost->options & LWS_SERVER_OPTION_IPV6_V6ONLY_VALUE) ? 1 : 0;
if (setsockopt(sockfd, SOL_IPV6, IPV6_V6ONLY,
(const void*)&value, sizeof(value)) < 0) {
compatible_close(sockfd);
return 1;
}
}
}
#endif
#if defined(__linux__) && defined(SO_REUSEPORT) && LWS_MAX_SMP > 1
if (vhost->context->count_threads > 1)
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEPORT,
(const void *)&opt, sizeof(opt)) < 0) {
compatible_close(sockfd);
return 1;
}
#endif
#endif
lws_plat_set_socket_options(vhost, sockfd);
#if LWS_POSIX
n = lws_socket_bind(vhost, sockfd, info->port, info->iface);
if (n < 0)
goto bail;
info->port = n;
#endif
vhost->listen_port = info->port;
vhost->iface = info->iface;
wsi = lws_zalloc(sizeof(struct lws));
if (wsi == NULL) {
lwsl_err("Out of mem\n");
goto bail;
}
wsi->context = vhost->context;
wsi->sock = sockfd;
wsi->mode = LWSCM_SERVER_LISTENER;
wsi->protocol = vhost->protocols;
wsi->tsi = m;
wsi->vhost = vhost;
wsi->listener = 1;
vhost->context->pt[m].wsi_listening = wsi;
if (insert_wsi_socket_into_fds(vhost->context, wsi))
goto bail;
vhost->context->count_wsi_allocated++;
vhost->lserv_wsi = wsi;
#if LWS_POSIX
listen(wsi->sock, LWS_SOMAXCONN);
} /* for each thread able to independently listen */
#else
mbed3_tcp_stream_bind(wsi->sock, info->port, wsi);
#endif
if (!lws_check_opt(info->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS)) {
#ifdef LWS_USE_UNIX_SOCK
if (LWS_UNIX_SOCK_ENABLED(vhost))
lwsl_notice(" Listening on \"%s\"\n", info->iface);
else
#endif
lwsl_notice(" Listening on port %d\n", info->port);
}
return 0;
bail:
compatible_close(sockfd);
return 1;
}
int
_lws_server_listen_accept_flow_control(struct lws *twsi, int on)
{
struct lws_context_per_thread *pt = &twsi->context->pt[(int)twsi->tsi];
struct lws *wsi = pt->wsi_listening;
int n;
if (!wsi || twsi->context->being_destroyed)
return 0;
lwsl_debug("%s: Thr %d: LISTEN wsi %p: state %d\n",
__func__, twsi->tsi, (void *)wsi, on);
if (on)
n = lws_change_pollfd(wsi, 0, LWS_POLLIN);
else
n = lws_change_pollfd(wsi, LWS_POLLIN, 0);
return n;
}
struct lws_vhost *
lws_select_vhost(struct lws_context *context, int port, const char *servername)
{
struct lws_vhost *vhost = context->vhost_list;
const char *p;
int n, m, colon;
n = strlen(servername);
colon = n;
p = strchr(servername, ':');
if (p)
colon = p - servername;
/* first try exact matches */
while (vhost) {
if (port == vhost->listen_port &&
!strncmp(vhost->name, servername, colon)) {
lwsl_info("SNI: Found: %s\n", servername);
return vhost;
}
vhost = vhost->vhost_next;
}
/*
* if no exact matches, try matching *.vhost-name
* unintentional matches are possible but resolve to x.com for *.x.com
* which is reasonable. If exact match exists we already chose it and
* never reach here. SSL will still fail it if the cert doesn't allow
* *.x.com.
*/
vhost = context->vhost_list;
while (vhost) {
m = strlen(vhost->name);
if (port == vhost->listen_port &&
m <= (colon - 2) &&
servername[colon - m - 1] == '.' &&
!strncmp(vhost->name, servername + colon - m, m)) {
lwsl_info("SNI: Found %s on wildcard: %s\n",
servername, vhost->name);
return vhost;
}
vhost = vhost->vhost_next;
}
return NULL;
}
LWS_VISIBLE LWS_EXTERN const struct lws_protocols *
lws_vhost_name_to_protocol(struct lws_vhost *vh, const char *name)
{
int n;
for (n = 0; n < vh->count_protocols; n++)
if (!strcmp(name, vh->protocols[n].name))
return &vh->protocols[n];
return NULL;
}
LWS_VISIBLE LWS_EXTERN const char *
lws_get_mimetype(const char *file, const struct lws_http_mount *m)
{
int n = strlen(file);
const struct lws_protocol_vhost_options *pvo = NULL;
if (m)
pvo = m->extra_mimetypes;
if (n < 5)
return NULL;
if (!strcmp(&file[n - 4], ".ico"))
return "image/x-icon";
if (!strcmp(&file[n - 4], ".gif"))
return "image/gif";
if (!strcmp(&file[n - 3], ".js"))
return "text/javascript";
if (!strcmp(&file[n - 4], ".png"))
return "image/png";
if (!strcmp(&file[n - 4], ".jpg"))
return "image/jpeg";
if (!strcmp(&file[n - 3], ".gz"))
return "application/gzip";
if (!strcmp(&file[n - 4], ".JPG"))
return "image/jpeg";
if (!strcmp(&file[n - 5], ".html"))
return "text/html";
if (!strcmp(&file[n - 4], ".css"))
return "text/css";
if (!strcmp(&file[n - 4], ".txt"))
return "text/plain";
if (!strcmp(&file[n - 4], ".ttf"))
return "application/x-font-ttf";
if (!strcmp(&file[n - 5], ".woff"))
return "application/font-woff";
if (!strcmp(&file[n - 4], ".xml"))
return "application/xml";
while (pvo) {
if (!strcmp(&file[n - strlen(pvo->name)], pvo->name))
return pvo->value;
pvo = pvo->next;
}
return NULL;
}
static int
lws_http_serve(struct lws *wsi, char *uri, const char *origin,
const struct lws_http_mount *m)
{
const struct lws_protocol_vhost_options *pvo = m->interpret;
struct lws_process_html_args args;
const char *mimetype;
#ifndef _WIN32_WCE
struct stat st;
#endif
char path[256], sym[512];
unsigned char *p = (unsigned char *)sym + 32 + LWS_PRE, *start = p;
unsigned char *end = p + sizeof(sym) - 32 - LWS_PRE;
#if !defined(WIN32)
size_t len;
#endif
int n, spin = 0;
snprintf(path, sizeof(path) - 1, "%s/%s", origin, uri);
#ifndef _WIN32_WCE
do {
spin++;
if (stat(path, &st)) {
lwsl_info("unable to stat %s\n", path);
goto bail;
}
lwsl_debug(" %s mode %d\n", path, S_IFMT & st.st_mode);
#if !defined(WIN32)
if ((S_IFMT & st.st_mode) == S_IFLNK) {
len = readlink(path, sym, sizeof(sym) - 1);
if (len) {
lwsl_err("Failed to read link %s\n", path);
goto bail;
}
sym[len] = '\0';
lwsl_debug("symlink %s -> %s\n", path, sym);
snprintf(path, sizeof(path) - 1, "%s", sym);
}
#endif
if ((S_IFMT & st.st_mode) == S_IFDIR) {
lwsl_debug("default filename append to dir\n");
snprintf(path, sizeof(path) - 1, "%s/%s/index.html",
origin, uri);
}
} while ((S_IFMT & st.st_mode) != S_IFREG && spin < 5);
if (spin == 5)
lwsl_err("symlink loop %s \n", path);
n = sprintf(sym, "%08lX%08lX", (unsigned long)st.st_size,
(unsigned long)st.st_mtime);
if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_IF_NONE_MATCH)) {
/*
* he thinks he has some version of it already,
* check if the tag matches
*/
if (!strcmp(sym, lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_IF_NONE_MATCH))) {
lwsl_debug("%s: ETAG match %s %s\n", __func__,
uri, origin);
/* we don't need to send the payload */
if (lws_add_http_header_status(wsi, 304, &p, end))
return -1;
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_ETAG,
(unsigned char *)sym, n, &p, end))
return -1;
if (lws_finalize_http_header(wsi, &p, end))
return -1;
n = lws_write(wsi, start, p - start,
LWS_WRITE_HTTP_HEADERS);
if (n != (p - start)) {
lwsl_err("_write returned %d from %d\n", n, p - start);
return -1;
}
return lws_http_transaction_completed(wsi);
}
}
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_ETAG,
(unsigned char *)sym, n, &p, end))
return -1;
#endif
mimetype = lws_get_mimetype(path, m);
if (!mimetype) {
lwsl_err("unknown mimetype for %s", path);
goto bail;
}
wsi->sending_chunked = 0;
/*
* check if this is in the list of file suffixes to be interpreted by
* a protocol
*/
while (pvo) {
n = strlen(path);
if (n > (int)strlen(pvo->name) &&
!strcmp(&path[n - strlen(pvo->name)], pvo->name)) {
wsi->sending_chunked = 1;
wsi->protocol_interpret_idx = (char)(long)pvo->value;
lwsl_info("want %s interpreted by %s\n", path,
wsi->vhost->protocols[(int)(long)(pvo->value)].name);
wsi->protocol = &wsi->vhost->protocols[(int)(long)(pvo->value)];
if (lws_ensure_user_space(wsi))
return -1;
break;
}
pvo = pvo->next;
}
if (m->protocol) {
const struct lws_protocols *pp = lws_vhost_name_to_protocol(
wsi->vhost, m->protocol);
if (lws_bind_protocol(wsi, pp))
return 1;
args.p = (char *)p;
args.max_len = end - p;
if (pp->callback(wsi, LWS_CALLBACK_ADD_HEADERS,
wsi->user_space, &args, 0))
return -1;
p = (unsigned char *)args.p;
}
n = lws_serve_http_file(wsi, path, mimetype, (char *)start, p - start);
if (n < 0 || ((n > 0) && lws_http_transaction_completed(wsi)))
return -1; /* error or can't reuse connection: close the socket */
return 0;
bail:
return -1;
}
const struct lws_http_mount *
lws_find_mount(struct lws *wsi, const char *uri_ptr, int uri_len)
{
const struct lws_http_mount *hm, *hit = NULL;
int best = 0;
hm = wsi->vhost->mount_list;
while (hm) {
if (uri_len >= hm->mountpoint_len &&
!strncmp(uri_ptr, hm->mountpoint, hm->mountpoint_len) &&
(uri_ptr[hm->mountpoint_len] == '\0' ||
uri_ptr[hm->mountpoint_len] == '/' ||
hm->mountpoint_len == 1)
) {
if (hm->origin_protocol == LWSMPRO_CALLBACK ||
((hm->origin_protocol == LWSMPRO_CGI ||
lws_hdr_total_length(wsi, WSI_TOKEN_GET_URI) ||
hm->protocol) &&
hm->mountpoint_len > best)) {
best = hm->mountpoint_len;
hit = hm;
}
}
hm = hm->mount_next;
}
return hit;
}
int
lws_http_action(struct lws *wsi)
{
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
enum http_connection_type connection_type;
enum http_version request_version;
char content_length_str[32];
struct lws_process_html_args args;
const struct lws_http_mount *hit = NULL;
unsigned int n, count = 0;
char http_version_str[10];
char http_conn_str[20];
int http_version_len;
char *uri_ptr = NULL, *s;
int uri_len = 0;
int meth = -1;
static const unsigned char methods[] = {
WSI_TOKEN_GET_URI,
WSI_TOKEN_POST_URI,
WSI_TOKEN_OPTIONS_URI,
WSI_TOKEN_PUT_URI,
WSI_TOKEN_PATCH_URI,
WSI_TOKEN_DELETE_URI,
#ifdef LWS_USE_HTTP2
WSI_TOKEN_HTTP_COLON_PATH,
#endif
};
#if defined(_DEBUG) || defined(LWS_WITH_ACCESS_LOG)
static const char * const method_names[] = {
"GET", "POST", "OPTIONS", "PUT", "PATCH", "DELETE",
#ifdef LWS_USE_HTTP2
":path",
#endif
};
#endif
static const char * const oprot[] = {
"http://", "https://"
};
/* it's not websocket.... shall we accept it as http? */
for (n = 0; n < ARRAY_SIZE(methods); n++)
if (lws_hdr_total_length(wsi, methods[n]))
count++;
if (!count) {
lwsl_warn("Missing URI in HTTP request\n");
goto bail_nuke_ah;
}
if (count != 1) {
lwsl_warn("multiple methods?\n");
goto bail_nuke_ah;
}
if (lws_ensure_user_space(wsi))
goto bail_nuke_ah;
for (n = 0; n < ARRAY_SIZE(methods); n++)
if (lws_hdr_total_length(wsi, methods[n])) {
uri_ptr = lws_hdr_simple_ptr(wsi, methods[n]);
uri_len = lws_hdr_total_length(wsi, methods[n]);
lwsl_info("Method: %s request for '%s'\n",
method_names[n], uri_ptr);
meth = n;
break;
}
(void)meth;
/* we insist on absolute paths */
if (uri_ptr[0] != '/') {
lws_return_http_status(wsi, HTTP_STATUS_FORBIDDEN, NULL);
goto bail_nuke_ah;
}
/* HTTP header had a content length? */
wsi->u.http.content_length = 0;
if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI) ||
lws_hdr_total_length(wsi, WSI_TOKEN_PATCH_URI) ||
lws_hdr_total_length(wsi, WSI_TOKEN_PUT_URI))
wsi->u.http.content_length = 100 * 1024 * 1024;
if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_CONTENT_LENGTH)) {
lws_hdr_copy(wsi, content_length_str,
sizeof(content_length_str) - 1,
WSI_TOKEN_HTTP_CONTENT_LENGTH);
wsi->u.http.content_length = atoi(content_length_str);
}
if (wsi->http2_substream) {
wsi->u.http.request_version = HTTP_VERSION_2;
} else {
/* http_version? Default to 1.0, override with token: */
request_version = HTTP_VERSION_1_0;
/* Works for single digit HTTP versions. : */
http_version_len = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP);
if (http_version_len > 7) {
lws_hdr_copy(wsi, http_version_str,
sizeof(http_version_str) - 1, WSI_TOKEN_HTTP);
if (http_version_str[5] == '1' && http_version_str[7] == '1')
request_version = HTTP_VERSION_1_1;
}
wsi->u.http.request_version = request_version;
/* HTTP/1.1 defaults to "keep-alive", 1.0 to "close" */
if (request_version == HTTP_VERSION_1_1)
connection_type = HTTP_CONNECTION_KEEP_ALIVE;
else
connection_type = HTTP_CONNECTION_CLOSE;
/* Override default if http "Connection:" header: */
if (lws_hdr_total_length(wsi, WSI_TOKEN_CONNECTION)) {
lws_hdr_copy(wsi, http_conn_str, sizeof(http_conn_str) - 1,
WSI_TOKEN_CONNECTION);
http_conn_str[sizeof(http_conn_str) - 1] = '\0';
if (!strcasecmp(http_conn_str, "keep-alive"))
connection_type = HTTP_CONNECTION_KEEP_ALIVE;
else
if (!strcasecmp(http_conn_str, "close"))
connection_type = HTTP_CONNECTION_CLOSE;
}
wsi->u.http.connection_type = connection_type;
}
n = wsi->protocol->callback(wsi, LWS_CALLBACK_FILTER_HTTP_CONNECTION,
wsi->user_space, uri_ptr, uri_len);
if (n) {
lwsl_info("LWS_CALLBACK_HTTP closing\n");
return 1;
}
/*
* if there is content supposed to be coming,
* put a timeout on it having arrived
*/
lws_set_timeout(wsi, PENDING_TIMEOUT_HTTP_CONTENT,
wsi->context->timeout_secs);
#ifdef LWS_OPENSSL_SUPPORT
if (wsi->redirect_to_https) {
/*
* we accepted http:// only so we could redirect to
* https://, so issue the redirect. Create the redirection
* URI from the host: header and ignore the path part
*/
unsigned char *start = pt->serv_buf + LWS_PRE, *p = start,
*end = p + 512;
if (!lws_hdr_total_length(wsi, WSI_TOKEN_HOST))
goto bail_nuke_ah;
n = sprintf((char *)end, "https://%s/",
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST));
n = lws_http_redirect(wsi, HTTP_STATUS_MOVED_PERMANENTLY,
end, n, &p, end);
if ((int)n < 0)
goto bail_nuke_ah;
return lws_http_transaction_completed(wsi);
}
#endif
#ifdef LWS_WITH_ACCESS_LOG
/*
* Produce Apache-compatible log string for wsi, like this:
*
* 2.31.234.19 - - [27/Mar/2016:03:22:44 +0800]
* "GET /aep-screen.png HTTP/1.1"
* 200 152987 "https://libwebsockets.org/index.html"
* "Mozilla/5.0 (Macint... Chrome/49.0.2623.87 Safari/537.36"
*
*/
{
static const char * const hver[] = {
"http/1.0", "http/1.1", "http/2"
};
#ifdef LWS_USE_IPV6
char ads[INET6_ADDRSTRLEN];
#else
char ads[INET_ADDRSTRLEN];
#endif
char da[64];
const char *pa, *me;
struct tm *tmp;
time_t t = time(NULL);
int l = 256;
if (wsi->access_log_pending)
lws_access_log(wsi);
wsi->access_log.header_log = lws_malloc(l);
if (wsi->access_log.header_log) {
tmp = localtime(&t);
if (tmp)
strftime(da, sizeof(da), "%d/%b/%Y:%H:%M:%S %z", tmp);
else
strcpy(da, "01/Jan/1970:00:00:00 +0000");
pa = lws_get_peer_simple(wsi, ads, sizeof(ads));
if (!pa)
pa = "(unknown)";
if (meth >= 0)
me = method_names[meth];
else
me = "unknown";
snprintf(wsi->access_log.header_log, l,
"%s - - [%s] \"%s %s %s\"",
pa, da, me, uri_ptr,
hver[wsi->u.http.request_version]);
l = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_USER_AGENT);
if (l) {
wsi->access_log.user_agent = lws_malloc(l + 2);
if (wsi->access_log.user_agent)
lws_hdr_copy(wsi, wsi->access_log.user_agent,
l + 1, WSI_TOKEN_HTTP_USER_AGENT);
else
lwsl_err("OOM getting user agent\n");
}
wsi->access_log_pending = 1;
}
}
#endif
/* can we serve it from the mount list? */
hit = lws_find_mount(wsi, uri_ptr, uri_len);
if (!hit) {
/* deferred cleanup and reset to protocols[0] */
lwsl_info("no hit\n");
if (lws_bind_protocol(wsi, &wsi->vhost->protocols[0]))
return 1;
n = wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP,
wsi->user_space, uri_ptr, uri_len);
goto after;
}
s = uri_ptr + hit->mountpoint_len;
args.p = uri_ptr;
args.len = uri_len;
args.max_len = hit->auth_mask;
args.final = 0; /* used to signal callback dealt with it */
n = wsi->protocol->callback(wsi, LWS_CALLBACK_CHECK_ACCESS_RIGHTS,
wsi->user_space, &args, 0);
if (n) {
lws_return_http_status(wsi, HTTP_STATUS_UNAUTHORIZED,
NULL);
goto bail_nuke_ah;
}
if (args.final) /* callback completely handled it well */
return 0;
/*
* if we have a mountpoint like https://xxx.com/yyy
* there is an implied / at the end for our purposes since
* we can only mount on a "directory".
*
* But if we just go with that, the browser cannot understand
* that he is actually looking down one "directory level", so
* even though we give him /yyy/abc.html he acts like the
* current directory level is /. So relative urls like "x.png"
* wrongly look outside the mountpoint.
*
* Therefore if we didn't come in on a url with an explicit
* / at the end, we must redirect to add it so the browser
* understands he is one "directory level" down.
*/
if ((hit->mountpoint_len > 1 ||
(hit->origin_protocol == LWSMPRO_REDIR_HTTP ||
hit->origin_protocol == LWSMPRO_REDIR_HTTPS)) &&
(*s != '/' ||
(hit->origin_protocol == LWSMPRO_REDIR_HTTP ||
hit->origin_protocol == LWSMPRO_REDIR_HTTPS)) &&
(hit->origin_protocol != LWSMPRO_CGI &&
hit->origin_protocol != LWSMPRO_CALLBACK //&&
//hit->protocol == NULL
)) {
unsigned char *start = pt->serv_buf + LWS_PRE,
*p = start, *end = p + 512;
lwsl_debug("Doing 301 '%s' org %s\n", s, hit->origin);
if (!lws_hdr_total_length(wsi, WSI_TOKEN_HOST))
goto bail_nuke_ah;
/* > at start indicates deal with by redirect */
if (hit->origin_protocol == LWSMPRO_REDIR_HTTP ||
hit->origin_protocol == LWSMPRO_REDIR_HTTPS)
n = snprintf((char *)end, 256, "%s%s",
oprot[hit->origin_protocol & 1],
hit->origin);
else
n = snprintf((char *)end, 256,
"%s%s%s/", oprot[lws_is_ssl(wsi)],
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST),
uri_ptr);
n = lws_http_redirect(wsi, HTTP_STATUS_MOVED_PERMANENTLY,
end, n, &p, end);
if ((int)n < 0)
goto bail_nuke_ah;
return lws_http_transaction_completed(wsi);
}
/*
* A particular protocol callback is mounted here?
*
* For the duration of this http transaction, bind us to the
* associated protocol
*/
if (hit->origin_protocol == LWSMPRO_CALLBACK || hit->protocol) {
const struct lws_protocols *pp;
const char *name = hit->origin;
if (hit->protocol)
name = hit->protocol;
pp = lws_vhost_name_to_protocol(wsi->vhost, name);
if (!pp) {
n = -1;
lwsl_err("Unable to find plugin '%s'\n",
hit->origin);
return 1;
}
if (lws_bind_protocol(wsi, pp))
return 1;
if (hit->cgienv && wsi->protocol->callback(wsi,
LWS_CALLBACK_HTTP_PMO,
wsi->user_space, (void *)hit->cgienv, 0))
return 1;
if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI)) {
n = wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP,
wsi->user_space,
uri_ptr + hit->mountpoint_len,
uri_len - hit->mountpoint_len);
goto after;
}
}
#ifdef LWS_WITH_CGI
/* did we hit something with a cgi:// origin? */
if (hit->origin_protocol == LWSMPRO_CGI) {
const char *cmd[] = {
NULL, /* replace with cgi path */
NULL
};
unsigned char *p, *end, buffer[256];
lwsl_debug("%s: cgi\n", __func__);
cmd[0] = hit->origin;
n = 5;
if (hit->cgi_timeout)
n = hit->cgi_timeout;
n = lws_cgi(wsi, cmd, hit->mountpoint_len, n,
hit->cgienv);
if (n) {
lwsl_err("%s: cgi failed\n");
return -1;
}
p = buffer + LWS_PRE;
end = p + sizeof(buffer) - LWS_PRE;
if (lws_add_http_header_status(wsi, 200, &p, end))
return 1;
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_CONNECTION,
(unsigned char *)"close", 5, &p, end))
return 1;
n = lws_write(wsi, buffer + LWS_PRE,
p - (buffer + LWS_PRE),
LWS_WRITE_HTTP_HEADERS);
goto deal_body;
}
#endif
n = strlen(s);
if (s[0] == '\0' || (n == 1 && s[n - 1] == '/'))
s = (char *)hit->def;
if (!s)
s = "index.html";
wsi->cache_secs = hit->cache_max_age;
wsi->cache_reuse = hit->cache_reusable;
wsi->cache_revalidate = hit->cache_revalidate;
wsi->cache_intermediaries = hit->cache_intermediaries;
n = lws_http_serve(wsi, s, hit->origin, hit);
if (n) {
/*
* lws_return_http_status(wsi, HTTP_STATUS_NOT_FOUND, NULL);
*/
if (hit->protocol) {
const struct lws_protocols *pp = lws_vhost_name_to_protocol(
wsi->vhost, hit->protocol);
if (lws_bind_protocol(wsi, pp))
return 1;
n = pp->callback(wsi, LWS_CALLBACK_HTTP,
wsi->user_space,
uri_ptr + hit->mountpoint_len,
uri_len - hit->mountpoint_len);
} else
n = wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP,
wsi->user_space, uri_ptr, uri_len);
}
after:
if (n) {
lwsl_info("LWS_CALLBACK_HTTP closing\n");
return 1;
}
#ifdef LWS_WITH_CGI
deal_body:
#endif
/*
* If we're not issuing a file, check for content_length or
* HTTP keep-alive. No keep-alive header allocation for
* ISSUING_FILE, as this uses HTTP/1.0.
*
* In any case, return 0 and let lws_read decide how to
* proceed based on state
*/
if (wsi->state != LWSS_HTTP_ISSUING_FILE)
/* Prepare to read body if we have a content length: */
if (wsi->u.http.content_length > 0)
wsi->state = LWSS_HTTP_BODY;
return 0;
bail_nuke_ah:
/* we're closing, losing some rx is OK */
wsi->u.hdr.ah->rxpos = wsi->u.hdr.ah->rxlen;
lws_header_table_detach(wsi, 1);
return 1;
}
int
lws_bind_protocol(struct lws *wsi, const struct lws_protocols *p)
{
// if (wsi->protocol == p)
// return 0;
if (wsi->protocol)
wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP_DROP_PROTOCOL,
wsi->user_space, NULL, 0);
if (!wsi->user_space_externally_allocated)
lws_free_set_NULL(wsi->user_space);
wsi->protocol = p;
if (!p)
return 0;
if (lws_ensure_user_space(wsi))
return 1;
if (wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP_BIND_PROTOCOL,
wsi->user_space, NULL, 0))
return 1;
return 0;
}
int
lws_handshake_server(struct lws *wsi, unsigned char **buf, size_t len)
{
struct lws_context *context = lws_get_context(wsi);
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
struct _lws_header_related hdr;
struct allocated_headers *ah;
int protocol_len, n, hit;
char protocol_list[128];
char protocol_name[32];
char *p;
if (len >= 10000000) {
lwsl_err("%s: assert: len %ld\n", __func__, (long)len);
assert(0);
}
if (!wsi->u.hdr.ah) {
lwsl_err("%s: assert: NULL ah\n", __func__);
assert(0);
}
while (len--) {
wsi->more_rx_waiting = !!len;
if (wsi->mode != LWSCM_HTTP_SERVING &&
wsi->mode != LWSCM_HTTP_SERVING_ACCEPTED) {
lwsl_err("%s: bad wsi mode %d\n", __func__, wsi->mode);
goto bail_nuke_ah;
}
if (lws_parse(wsi, *(*buf)++)) {
lwsl_info("lws_parse failed\n");
goto bail_nuke_ah;
}
if (wsi->u.hdr.parser_state != WSI_PARSING_COMPLETE)
continue;
lwsl_parser("%s: lws_parse sees parsing complete\n", __func__);
lwsl_debug("%s: wsi->more_rx_waiting=%d\n", __func__,
wsi->more_rx_waiting);
/* select vhost */
if (lws_hdr_total_length(wsi, WSI_TOKEN_HOST)) {
struct lws_vhost *vhost = lws_select_vhost(
context, wsi->vhost->listen_port,
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST));
if (vhost)
wsi->vhost = vhost;
} else
lwsl_info("no host\n");
wsi->vhost->trans++;
if (!wsi->conn_stat_done) {
wsi->vhost->conn++;
wsi->conn_stat_done = 1;
}
wsi->mode = LWSCM_PRE_WS_SERVING_ACCEPT;
lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
/* is this websocket protocol or normal http 1.0? */
if (lws_hdr_total_length(wsi, WSI_TOKEN_UPGRADE)) {
if (!strcasecmp(lws_hdr_simple_ptr(wsi, WSI_TOKEN_UPGRADE),
"websocket")) {
wsi->vhost->ws_upgrades++;
lwsl_info("Upgrade to ws\n");
goto upgrade_ws;
}
#ifdef LWS_USE_HTTP2
if (!strcasecmp(lws_hdr_simple_ptr(wsi, WSI_TOKEN_UPGRADE),
"h2c")) {
wsi->vhost->http2_upgrades++;
lwsl_info("Upgrade to h2c\n");
goto upgrade_h2c;
}
#endif
lwsl_info("Unknown upgrade\n");
/* dunno what he wanted to upgrade to */
goto bail_nuke_ah;
}
/* no upgrade ack... he remained as HTTP */
lwsl_info("No upgrade\n");
ah = wsi->u.hdr.ah;
lws_union_transition(wsi, LWSCM_HTTP_SERVING_ACCEPTED);
wsi->state = LWSS_HTTP;
wsi->u.http.fd = LWS_INVALID_FILE;
/* expose it at the same offset as u.hdr */
wsi->u.http.ah = ah;
lwsl_debug("%s: wsi %p: ah %p\n", __func__, (void *)wsi,
(void *)wsi->u.hdr.ah);
n = lws_http_action(wsi);
return n;
#ifdef LWS_USE_HTTP2
upgrade_h2c:
if (!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP2_SETTINGS)) {
lwsl_info("missing http2_settings\n");
goto bail_nuke_ah;
}
lwsl_info("h2c upgrade...\n");
p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP2_SETTINGS);
/* convert the peer's HTTP-Settings */
n = lws_b64_decode_string(p, protocol_list,
sizeof(protocol_list));
if (n < 0) {
lwsl_parser("HTTP2_SETTINGS too long\n");
return 1;
}
/* adopt the header info */
ah = wsi->u.hdr.ah;
lws_union_transition(wsi, LWSCM_HTTP2_SERVING);
/* http2 union member has http union struct at start */
wsi->u.http.ah = ah;
lws_http2_init(&wsi->u.http2.peer_settings);
lws_http2_init(&wsi->u.http2.my_settings);
/* HTTP2 union */
lws_http2_interpret_settings_payload(&wsi->u.http2.peer_settings,
(unsigned char *)protocol_list, n);
strcpy(protocol_list,
"HTTP/1.1 101 Switching Protocols\x0d\x0a"
"Connection: Upgrade\x0d\x0a"
"Upgrade: h2c\x0d\x0a\x0d\x0a");
n = lws_issue_raw(wsi, (unsigned char *)protocol_list,
strlen(protocol_list));
if (n != strlen(protocol_list)) {
lwsl_debug("http2 switch: ERROR writing to socket\n");
return 1;
}
wsi->state = LWSS_HTTP2_AWAIT_CLIENT_PREFACE;
return 0;
#endif
upgrade_ws:
if (!wsi->protocol)
lwsl_err("NULL protocol at lws_read\n");
/*
* It's websocket
*
* Select the first protocol we support from the list
* the client sent us.
*
* Copy it to remove header fragmentation
*/
if (lws_hdr_copy(wsi, protocol_list, sizeof(protocol_list) - 1,
WSI_TOKEN_PROTOCOL) < 0) {
lwsl_err("protocol list too long");
goto bail_nuke_ah;
}
protocol_len = lws_hdr_total_length(wsi, WSI_TOKEN_PROTOCOL);
protocol_list[protocol_len] = '\0';
p = protocol_list;
hit = 0;
while (*p && !hit) {
n = 0;
while (n < sizeof(protocol_name) - 1 && *p && *p !=',')
protocol_name[n++] = *p++;
protocol_name[n] = '\0';
if (*p)
p++;
lwsl_info("checking %s\n", protocol_name);
n = 0;
while (wsi->vhost->protocols[n].callback) {
if (wsi->vhost->protocols[n].name &&
!strcmp(wsi->vhost->protocols[n].name,
protocol_name)) {
wsi->protocol = &wsi->vhost->protocols[n];
hit = 1;
break;
}
n++;
}
}
/* we didn't find a protocol he wanted? */
if (!hit) {
if (lws_hdr_simple_ptr(wsi, WSI_TOKEN_PROTOCOL)) {
lwsl_info("No protocol from \"%s\" supported\n",
protocol_list);
goto bail_nuke_ah;
}
/*
* some clients only have one protocol and
* do not send the protocol list header...
* allow it and match to the vhost's default
* protocol (which itself defaults to zero)
*/
lwsl_info("defaulting to prot handler %d\n",
wsi->vhost->default_protocol_index);
n = 0;
wsi->protocol = &wsi->vhost->protocols[
(int)wsi->vhost->default_protocol_index];
}
/* allocate wsi->user storage */
if (lws_ensure_user_space(wsi))
goto bail_nuke_ah;
/*
* Give the user code a chance to study the request and
* have the opportunity to deny it
*/
if ((wsi->protocol->callback)(wsi,
LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION,
wsi->user_space,
lws_hdr_simple_ptr(wsi, WSI_TOKEN_PROTOCOL), 0)) {
lwsl_warn("User code denied connection\n");
goto bail_nuke_ah;
}
/*
* Perform the handshake according to the protocol version the
* client announced
*/
switch (wsi->ietf_spec_revision) {
case 13:
lwsl_parser("lws_parse calling handshake_04\n");
if (handshake_0405(context, wsi)) {
lwsl_info("hs0405 has failed the connection\n");
goto bail_nuke_ah;
}
break;
default:
lwsl_info("Unknown client spec version %d\n",
wsi->ietf_spec_revision);
goto bail_nuke_ah;
}
/*
* stitch protocol choice into the vh protocol linked list
* We always insert ourselves at the start of the list
*
* X <-> B
* X <-> pAn <-> pB
*/
//lwsl_err("%s: pre insert vhost start wsi %p, that wsi prev == %p\n",
// __func__,
// wsi->vhost->same_vh_protocol_list[n],
// wsi->same_vh_protocol_prev);
wsi->same_vh_protocol_prev = /* guy who points to us */
&wsi->vhost->same_vh_protocol_list[n];
wsi->same_vh_protocol_next = /* old first guy is our next */
wsi->vhost->same_vh_protocol_list[n];
/* we become the new first guy */
wsi->vhost->same_vh_protocol_list[n] = wsi;
if (wsi->same_vh_protocol_next)
/* old first guy points back to us now */
wsi->same_vh_protocol_next->same_vh_protocol_prev =
&wsi->same_vh_protocol_next;
/* we are upgrading to ws, so http/1.1 and keepalive +
* pipelined header considerations about keeping the ah around
* no longer apply. However it's common for the first ws
* protocol data to have been coalesced with the browser
* upgrade request and to already be in the ah rx buffer.
*/
lwsl_info("%s: %p: inheriting ah in ws mode (rxpos:%d, rxlen:%d)\n",
__func__, wsi, wsi->u.hdr.ah->rxpos,
wsi->u.hdr.ah->rxlen);
lws_pt_lock(pt);
hdr = wsi->u.hdr;
lws_union_transition(wsi, LWSCM_WS_SERVING);
/*
* first service is WS mode will notice this, use the RX and
* then detach the ah (caution: we are not in u.hdr union
* mode any more then... ah_temp member is at start the same
* though)
*
* Because rxpos/rxlen shows something in the ah, we will get
* service guaranteed next time around the event loop
*
* All union members begin with hdr, so we can use it even
* though we transitioned to ws union mode (the ah detach
* code uses it anyway).
*/
wsi->u.hdr = hdr;
lws_pt_unlock(pt);
/*
* create the frame buffer for this connection according to the
* size mentioned in the protocol definition. If 0 there, use
* a big default for compatibility
*/
n = wsi->protocol->rx_buffer_size;
if (!n)
n = context->pt_serv_buf_size;
n += LWS_PRE;
wsi->u.ws.rx_ubuf = lws_malloc(n + 4 /* 0x0000ffff zlib */);
if (!wsi->u.ws.rx_ubuf) {
lwsl_err("Out of Mem allocating rx buffer %d\n", n);
return 1;
}
wsi->u.ws.rx_ubuf_alloc = n;
lwsl_debug("Allocating RX buffer %d\n", n);
#if LWS_POSIX
if (setsockopt(wsi->sock, SOL_SOCKET, SO_SNDBUF,
(const char *)&n, sizeof n)) {
lwsl_warn("Failed to set SNDBUF to %d", n);
return 1;
}
#endif
lwsl_parser("accepted v%02d connection\n",
wsi->ietf_spec_revision);
/* notify user code that we're ready to roll */
if (wsi->protocol->callback)
if (wsi->protocol->callback(wsi, LWS_CALLBACK_ESTABLISHED,
wsi->user_space,
#ifdef LWS_OPENSSL_SUPPORT
wsi->ssl,
#else
NULL,
#endif
0))
return 1;
return 0;
} /* while all chars are handled */
return 0;
bail_nuke_ah:
/* drop the header info */
/* we're closing, losing some rx is OK */
wsi->u.hdr.ah->rxpos = wsi->u.hdr.ah->rxlen;
lws_header_table_detach(wsi, 1);
return 1;
}
static int
lws_get_idlest_tsi(struct lws_context *context)
{
unsigned int lowest = ~0;
int n = 0, hit = -1;
for (; n < context->count_threads; n++) {
if ((unsigned int)context->pt[n].fds_count !=
context->fd_limit_per_thread - 1 &&
(unsigned int)context->pt[n].fds_count < lowest) {
lowest = context->pt[n].fds_count;
hit = n;
}
}
return hit;
}
struct lws *
lws_create_new_server_wsi(struct lws_vhost *vhost)
{
struct lws *new_wsi;
int n = lws_get_idlest_tsi(vhost->context);
if (n < 0) {
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 = n;
lwsl_info("Accepted %p to tsi %d\n", new_wsi, new_wsi->tsi);
new_wsi->vhost = vhost;
new_wsi->context = vhost->context;
new_wsi->pending_timeout = NO_PENDING_TIMEOUT;
new_wsi->rxflow_change_to = LWS_RXFLOW_ALLOW;
/* intialize the instance struct */
new_wsi->state = LWSS_HTTP;
new_wsi->mode = LWSCM_HTTP_SERVING;
new_wsi->hdr_parsing_completed = 0;
#ifdef LWS_OPENSSL_SUPPORT
new_wsi->use_ssl = LWS_SSL_ENABLED(vhost);
#endif
/*
* these can only be set once the protocol is known
* we set an unestablished connection's protocol pointer
* to the start of the supported list, so it can look
* for matching ones during the handshake
*/
new_wsi->protocol = vhost->protocols;
new_wsi->user_space = NULL;
new_wsi->ietf_spec_revision = 0;
new_wsi->sock = LWS_SOCK_INVALID;
vhost->context->count_wsi_allocated++;
/*
* outermost create notification for wsi
* no user_space because no protocol selection
*/
vhost->protocols[0].callback(new_wsi, LWS_CALLBACK_WSI_CREATE,
NULL, NULL, 0);
return new_wsi;
}
LWS_VISIBLE int LWS_WARN_UNUSED_RESULT
lws_http_transaction_completed(struct lws *wsi)
{
int n = NO_PENDING_TIMEOUT;
lws_access_log(wsi);
lwsl_debug("%s: wsi %p\n", __func__, wsi);
/* if we can't go back to accept new headers, drop the connection */
if (wsi->u.http.connection_type != HTTP_CONNECTION_KEEP_ALIVE) {
lwsl_info("%s: %p: close connection\n", __func__, wsi);
return 1;
}
if (lws_bind_protocol(wsi, &wsi->vhost->protocols[0]))
return 1;
/* otherwise set ourselves up ready to go again */
wsi->state = LWSS_HTTP;
wsi->mode = LWSCM_HTTP_SERVING;
wsi->u.http.content_length = 0;
wsi->u.http.content_remain = 0;
wsi->hdr_parsing_completed = 0;
#ifdef LWS_WITH_ACCESS_LOG
wsi->access_log.sent = 0;
#endif
if (wsi->vhost->keepalive_timeout)
n = PENDING_TIMEOUT_HTTP_KEEPALIVE_IDLE;
lws_set_timeout(wsi, n, wsi->vhost->keepalive_timeout);
/*
* We already know we are on http1.1 / keepalive and the next thing
* coming will be another header set.
*
* If there is no pending rx and we still have the ah, drop it and
* reacquire a new ah when the new headers start to arrive. (Otherwise
* we needlessly hog an ah indefinitely.)
*
* However if there is pending rx and we know from the keepalive state
* that is already at least the start of another header set, simply
* reset the existing header table and keep it.
*/
if (wsi->u.hdr.ah) {
lwsl_info("%s: wsi->more_rx_waiting=%d\n", __func__,
wsi->more_rx_waiting);
if (!wsi->more_rx_waiting) {
wsi->u.hdr.ah->rxpos = wsi->u.hdr.ah->rxlen;
lws_header_table_detach(wsi, 1);
} else
lws_header_table_reset(wsi, 1);
}
/* If we're (re)starting on headers, need other implied init */
wsi->u.hdr.ues = URIES_IDLE;
lwsl_info("%s: %p: keep-alive await new transaction\n", __func__, wsi);
return 0;
}
static struct lws *
lws_adopt_socket_vhost(struct lws_vhost *vh, lws_sockfd_type accept_fd)
{
struct lws_context *context = vh->context;
struct lws *new_wsi = lws_create_new_server_wsi(vh);
if (!new_wsi) {
compatible_close(accept_fd);
return NULL;
}
lwsl_info("%s: new wsi %p, sockfd %d\n", __func__, new_wsi, accept_fd);
new_wsi->sock = accept_fd;
/* the transport is accepted... give him time to negotiate */
lws_set_timeout(new_wsi, PENDING_TIMEOUT_ESTABLISH_WITH_SERVER,
context->timeout_secs);
#if LWS_POSIX == 0
mbed3_tcp_stream_accept(accept_fd, new_wsi);
#endif
/*
* A new connection was accepted. Give the user a chance to
* set properties of the newly created wsi. There's no protocol
* selected yet so we issue this to protocols[0]
*/
if ((context->vhost_list->protocols[0].callback)(new_wsi,
LWS_CALLBACK_SERVER_NEW_CLIENT_INSTANTIATED, NULL, NULL, 0)) {
compatible_close(new_wsi->sock);
lws_free(new_wsi);
return NULL;
}
lws_libev_accept(new_wsi, new_wsi->sock);
lws_libuv_accept(new_wsi, new_wsi->sock);
if (!LWS_SSL_ENABLED(new_wsi->vhost)) {
if (insert_wsi_socket_into_fds(context, new_wsi)) {
lwsl_err("%s: fail inserting socket\n", __func__);
goto fail;
}
} else {
new_wsi->mode = LWSCM_SSL_INIT;
if (lws_server_socket_service_ssl(new_wsi, accept_fd)) {
lwsl_err("%s: fail ssl negotiation\n", __func__);
goto fail;
}
}
if (!lws_header_table_attach(new_wsi, 0))
lwsl_debug("Attached ah immediately\n");
return new_wsi;
fail:
lws_close_free_wsi(new_wsi, LWS_CLOSE_STATUS_NOSTATUS);
return NULL;
}
LWS_VISIBLE struct lws *
lws_adopt_socket(struct lws_context *context, lws_sockfd_type accept_fd)
{
return lws_adopt_socket_vhost(context->vhost_list, accept_fd);
}
LWS_VISIBLE LWS_EXTERN struct lws *
lws_adopt_socket_readbuf(struct lws_context *context, lws_sockfd_type accept_fd,
const char *readbuf, size_t len)
{
struct lws *wsi = lws_adopt_socket(context, accept_fd);
struct lws_context_per_thread *pt;
struct allocated_headers *ah;
struct lws_pollfd *pfd;
if (!wsi)
return NULL;
if (!readbuf)
return wsi;
if (len > sizeof(ah->rx)) {
lwsl_err("%s: rx in too big\n", __func__);
goto bail;
}
/*
* we can't process the initial read data until we can attach an ah.
*
* if one is available, get it and place the data in his ah rxbuf...
* wsi with ah that have pending rxbuf get auto-POLLIN service.
*
* no autoservice because we didn't get a chance to attach the
* readbuf data to wsi or ah yet, and we will do it next if we get
* the ah.
*/
if (wsi->u.hdr.ah || !lws_header_table_attach(wsi, 0)) {
ah = wsi->u.hdr.ah;
memcpy(ah->rx, readbuf, len);
ah->rxpos = 0;
ah->rxlen = len;
lwsl_notice("%s: calling service on readbuf ah\n", __func__);
pt = &context->pt[(int)wsi->tsi];
/* unlike a normal connect, we have the headers already
* (or the first part of them anyway).
* libuv won't come back and service us without a network
* event, so we need to do the header service right here.
*/
pfd = &pt->fds[wsi->position_in_fds_table];
pfd->revents |= LWS_POLLIN;
lwsl_err("%s: calling service\n", __func__);
if (lws_service_fd_tsi(context, pfd, wsi->tsi))
/* service closed us */
return NULL;
return wsi;
}
lwsl_err("%s: deferring handling ah\n", __func__);
/*
* hum if no ah came, we are on the wait list and must defer
* dealing with this until the ah arrives.
*
* later successful lws_header_table_attach() will apply the
* below to the rx buffer (via lws_header_table_reset()).
*/
wsi->u.hdr.preamble_rx = lws_malloc(len);
if (!wsi->u.hdr.preamble_rx) {
lwsl_err("OOM\n");
goto bail;
}
memcpy(wsi->u.hdr.preamble_rx, readbuf, len);
wsi->u.hdr.preamble_rx_len = len;
return wsi;
bail:
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
return NULL;
}
LWS_VISIBLE int
lws_server_socket_service(struct lws_context *context, struct lws *wsi,
struct lws_pollfd *pollfd)
{
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
lws_sockfd_type accept_fd = LWS_SOCK_INVALID;
struct allocated_headers *ah;
#if LWS_POSIX
struct sockaddr_in cli_addr;
socklen_t clilen;
#endif
int n, len;
switch (wsi->mode) {
case LWSCM_HTTP_SERVING:
case LWSCM_HTTP_SERVING_ACCEPTED:
case LWSCM_HTTP2_SERVING:
/* handle http headers coming in */
/* pending truncated sends have uber priority */
if (wsi->trunc_len) {
if (!(pollfd->revents & LWS_POLLOUT))
break;
if (lws_issue_raw(wsi, wsi->trunc_alloc +
wsi->trunc_offset,
wsi->trunc_len) < 0)
goto fail;
/*
* we can't afford to allow input processing to send
* something new, so spin around he event loop until
* he doesn't have any partials
*/
break;
}
/* any incoming data ready? */
if (!(pollfd->revents & pollfd->events & LWS_POLLIN))
goto try_pollout;
/*
* If we previously just did POLLIN when IN and OUT were
* signalled (because POLLIN processing may have used up
* the POLLOUT), don't let that happen twice in a row...
* next time we see the situation favour POLLOUT
*/
if (wsi->favoured_pollin &&
(pollfd->revents & pollfd->events & LWS_POLLOUT)) {
wsi->favoured_pollin = 0;
goto try_pollout;
}
/* these states imply we MUST have an ah attached */
if (wsi->state == LWSS_HTTP ||
wsi->state == LWSS_HTTP_ISSUING_FILE ||
wsi->state == LWSS_HTTP_HEADERS) {
if (!wsi->u.hdr.ah)
/* no autoservice beacuse we will do it next */
if (lws_header_table_attach(wsi, 0))
goto try_pollout;
ah = wsi->u.hdr.ah;
lwsl_debug("%s: %p: rxpos:%d rxlen:%d\n", __func__, wsi,
ah->rxpos, ah->rxlen);
/* if nothing in ah rx buffer, get some fresh rx */
if (ah->rxpos == ah->rxlen) {
ah->rxlen = lws_ssl_capable_read(wsi, ah->rx,
sizeof(ah->rx));
ah->rxpos = 0;
lwsl_debug("%s: wsi %p, ah->rxlen = %d\r\n",
__func__, wsi, ah->rxlen);
switch (ah->rxlen) {
case 0:
lwsl_info("%s: read 0 len\n", __func__);
/* lwsl_info(" state=%d\n", wsi->state); */
// if (!wsi->hdr_parsing_completed)
// lws_header_table_detach(wsi);
/* fallthru */
case LWS_SSL_CAPABLE_ERROR:
goto fail;
case LWS_SSL_CAPABLE_MORE_SERVICE:
ah->rxlen = ah->rxpos = 0;
goto try_pollout;
}
}
if (!(ah->rxpos != ah->rxlen && ah->rxlen)) {
lwsl_err("%s: assert: rxpos %d, rxlen %d\n",
__func__, ah->rxpos, ah->rxlen);
assert(0);
}
/* just ignore incoming if waiting for close */
if (wsi->state != LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE) {
n = lws_read(wsi, ah->rx + ah->rxpos,
ah->rxlen - ah->rxpos);
if (n < 0) /* we closed wsi */
return 1;
if (wsi->u.hdr.ah) {
if ( wsi->u.hdr.ah->rxlen)
wsi->u.hdr.ah->rxpos += n;
if (wsi->u.hdr.ah->rxpos == wsi->u.hdr.ah->rxlen &&
(wsi->mode != LWSCM_HTTP_SERVING &&
wsi->mode != LWSCM_HTTP_SERVING_ACCEPTED &&
wsi->mode != LWSCM_HTTP2_SERVING))
lws_header_table_detach(wsi, 1);
}
break;
}
goto try_pollout;
}
len = lws_ssl_capable_read(wsi, pt->serv_buf,
context->pt_serv_buf_size);
lwsl_debug("%s: wsi %p read %d\r\n", __func__, wsi, len);
switch (len) {
case 0:
lwsl_info("%s: read 0 len\n", __func__);
/* lwsl_info(" state=%d\n", wsi->state); */
// if (!wsi->hdr_parsing_completed)
// lws_header_table_detach(wsi);
/* fallthru */
case LWS_SSL_CAPABLE_ERROR:
goto fail;
case LWS_SSL_CAPABLE_MORE_SERVICE:
goto try_pollout;
}
/* just ignore incoming if waiting for close */
if (wsi->state != LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE) {
/*
* this may want to send
* (via HTTP callback for example)
*/
n = lws_read(wsi, pt->serv_buf, len);
if (n < 0) /* we closed wsi */
return 1;
/*
* he may have used up the
* writability above, if we will defer POLLOUT
* processing in favour of POLLIN, note it
*/
if (pollfd->revents & LWS_POLLOUT)
wsi->favoured_pollin = 1;
break;
}
try_pollout:
/* this handles POLLOUT for http serving fragments */
if (!(pollfd->revents & LWS_POLLOUT))
break;
/* one shot */
if (lws_change_pollfd(wsi, LWS_POLLOUT, 0)) {
lwsl_notice("%s a\n", __func__);
goto fail;
}
if (!wsi->hdr_parsing_completed)
break;
if (wsi->state != LWSS_HTTP_ISSUING_FILE) {
n = user_callback_handle_rxflow(wsi->protocol->callback,
wsi, LWS_CALLBACK_HTTP_WRITEABLE,
wsi->user_space, NULL, 0);
if (n < 0) {
lwsl_info("writeable_fail\n");
goto fail;
}
break;
}
/* >0 == completion, <0 == error */
n = lws_serve_http_file_fragment(wsi);
if (n < 0 || (n > 0 && lws_http_transaction_completed(wsi))) {
lwsl_info("completed\n");
goto fail;
}
break;
case LWSCM_SERVER_LISTENER:
#if LWS_POSIX
/* pollin means a client has connected to us then */
do {
if (!(pollfd->revents & LWS_POLLIN) || !(pollfd->events & LWS_POLLIN))
break;
/* listen socket got an unencrypted connection... */
clilen = sizeof(cli_addr);
lws_latency_pre(context, wsi);
accept_fd = accept(pollfd->fd, (struct sockaddr *)&cli_addr,
&clilen);
lws_latency(context, wsi, "listener accept", accept_fd,
accept_fd >= 0);
if (accept_fd < 0) {
if (LWS_ERRNO == LWS_EAGAIN ||
LWS_ERRNO == LWS_EWOULDBLOCK) {
lwsl_err("accept asks to try again\n");
break;
}
lwsl_err("ERROR on accept: %s\n", strerror(LWS_ERRNO));
break;
}
lws_plat_set_socket_options(wsi->vhost, accept_fd);
lwsl_debug("accepted new conn port %u on fd=%d\n",
ntohs(cli_addr.sin_port), accept_fd);
#else
/* not very beautiful... */
accept_fd = (lws_sockfd_type)pollfd;
#endif
/*
* look at who we connected to and give user code a chance
* to reject based on client IP. There's no protocol selected
* yet so we issue this to protocols[0]
*/
if ((wsi->vhost->protocols[0].callback)(wsi,
LWS_CALLBACK_FILTER_NETWORK_CONNECTION,
NULL, (void *)(long)accept_fd, 0)) {
lwsl_debug("Callback denied network connection\n");
compatible_close(accept_fd);
break;
}
if (!lws_adopt_socket_vhost(wsi->vhost, accept_fd))
/* already closed cleanly as necessary */
return 1;
#if LWS_POSIX
} while (pt->fds_count < context->fd_limit_per_thread - 1 &&
lws_poll_listen_fd(&pt->fds[wsi->position_in_fds_table]) > 0);
#endif
return 0;
default:
break;
}
if (!lws_server_socket_service_ssl(wsi, accept_fd))
return 0;
fail:
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
return 1;
}
LWS_VISIBLE int
lws_serve_http_file(struct lws *wsi, const char *file, const char *content_type,
const char *other_headers, int other_headers_len)
{
static const char * const intermediates[] = { "private", "public" };
struct lws_context *context = lws_get_context(wsi);
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
char cache_control[50], *cc = "no-store";
unsigned char *response = pt->serv_buf + LWS_PRE;
unsigned char *p = response;
unsigned char *end = p + context->pt_serv_buf_size - LWS_PRE;
int ret = 0, cclen = 8;
wsi->u.http.fd = lws_plat_file_open(wsi, file, &wsi->u.http.filelen,
O_RDONLY);
if (wsi->u.http.fd == LWS_INVALID_FILE) {
lwsl_info("Unable to open '%s'\n", file);
lws_return_http_status(wsi, HTTP_STATUS_NOT_FOUND, NULL);
return -1;
}
if (lws_add_http_header_status(wsi, 200, &p, end))
return -1;
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE,
(unsigned char *)content_type,
strlen(content_type), &p, end))
return -1;
if (!wsi->sending_chunked) {
if (lws_add_http_header_content_length(wsi, wsi->u.http.filelen, &p, end))
return -1;
} else {
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_TRANSFER_ENCODING,
(unsigned char *)"chunked",
7, &p, end))
return -1;
}
if (wsi->cache_secs && wsi->cache_reuse) {
if (wsi->cache_revalidate) {
cc = cache_control;
cclen = sprintf(cache_control, "%s max-age: %u",
intermediates[wsi->cache_intermediaries],
wsi->cache_secs);
} else {
cc = "no-cache";
cclen = 8;
}
}
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CACHE_CONTROL,
(unsigned char *)cc, cclen, &p, end))
return -1;
if (other_headers) {
if ((end - p) < other_headers_len)
return -1;
memcpy(p, other_headers, other_headers_len);
p += other_headers_len;
}
if (lws_finalize_http_header(wsi, &p, end))
return -1;
ret = lws_write(wsi, response, p - response, LWS_WRITE_HTTP_HEADERS);
if (ret != (p - response)) {
lwsl_err("_write returned %d from %d\n", ret, (p - response));
return -1;
}
wsi->u.http.filepos = 0;
wsi->state = LWSS_HTTP_ISSUING_FILE;
return lws_serve_http_file_fragment(wsi);
}
int
lws_interpret_incoming_packet(struct lws *wsi, unsigned char **buf, size_t len)
{
int m;
lwsl_parser("%s: received %d byte packet\n", __func__, (int)len);
#if 0
lwsl_hexdump(*buf, len);
#endif
/* let the rx protocol state machine have as much as it needs */
while (len) {
/*
* we were accepting input but now we stopped doing so
*/
if (!(wsi->rxflow_change_to & LWS_RXFLOW_ALLOW)) {
lws_rxflow_cache(wsi, *buf, 0, len);
lwsl_parser("%s: cached %d\n", __func__, len);
return 1;
}
if (wsi->u.ws.rx_draining_ext) {
m = lws_rx_sm(wsi, 0);
if (m < 0)
return -1;
continue;
}
/* account for what we're using in rxflow buffer */
if (wsi->rxflow_buffer)
wsi->rxflow_pos++;
/* consume payload bytes efficiently */
if (wsi->lws_rx_parse_state ==
LWS_RXPS_PAYLOAD_UNTIL_LENGTH_EXHAUSTED)
lws_payload_until_length_exhausted(wsi, buf, &len);
/* process the byte */
m = lws_rx_sm(wsi, *(*buf)++);
if (m < 0)
return -1;
len--;
}
lwsl_parser("%s: exit with %d unused\n", __func__, (int)len);
return 0;
}
LWS_VISIBLE void
lws_server_get_canonical_hostname(struct lws_context *context,
struct lws_context_creation_info *info)
{
if (lws_check_opt(info->options, LWS_SERVER_OPTION_SKIP_SERVER_CANONICAL_NAME))
return;
#if LWS_POSIX
/* find canonical hostname */
gethostname((char *)context->canonical_hostname,
sizeof(context->canonical_hostname) - 1);
lwsl_notice(" canonical_hostname = %s\n", context->canonical_hostname);
#else
(void)context;
#endif
}
#define LWS_MAX_ELEM_NAME 32
enum urldecode_stateful {
US_NAME,
US_IDLE,
US_PC1,
US_PC2,
MT_LOOK_BOUND_IN,
MT_HNAME,
MT_DISP,
MT_TYPE,
MT_IGNORE1,
MT_IGNORE2,
};
static const char * const mp_hdr[] = {
"content-disposition: ",
"content-type: ",
"\x0d\x0a"
};
typedef int (*lws_urldecode_stateful_cb)(void *data,
const char *name, char **buf, int len, int final);
struct lws_urldecode_stateful {
char *out;
void *data;
char name[LWS_MAX_ELEM_NAME];
char temp[LWS_MAX_ELEM_NAME];
char content_type[32];
char content_disp[32];
char content_disp_filename[256];
char mime_boundary[128];
int out_len;
int pos;
int hdr_idx;
int mp;
unsigned int multipart_form_data:1;
unsigned int inside_quote:1;
unsigned int subname:1;
unsigned int boundary_real_crlf:1;
enum urldecode_stateful state;
lws_urldecode_stateful_cb output;
};
static struct lws_urldecode_stateful *
lws_urldecode_s_create(struct lws *wsi, char *out, int out_len, void *data,
lws_urldecode_stateful_cb output)
{
struct lws_urldecode_stateful *s = lws_zalloc(sizeof(*s));
char buf[200], *p;
int m = 0;
if (!s)
return NULL;
s->out = out;
s->out_len = out_len;
s->output = output;
s->pos = 0;
s->mp = 0;
s->state = US_NAME;
s->name[0] = '\0';
s->data = data;
if (lws_hdr_copy(wsi, buf, sizeof(buf), WSI_TOKEN_HTTP_CONTENT_TYPE) > 0) {
/* multipart/form-data; boundary=----WebKitFormBoundarycc7YgAPEIHvgE9Bf */
if (!strncmp(buf, "multipart/form-data", 19)) {
s->multipart_form_data = 1;
s->state = MT_LOOK_BOUND_IN;
s->mp = 2;
p = strstr(buf, "boundary=");
if (p) {
p += 9;
s->mime_boundary[m++] = '\x0d';
s->mime_boundary[m++] = '\x0a';
s->mime_boundary[m++] = '-';
s->mime_boundary[m++] = '-';
while (m < sizeof(s->mime_boundary) - 1 &&
*p && *p != ' ')
s->mime_boundary[m++] = *p++;
s->mime_boundary[m] = '\0';
lwsl_notice("boundary '%s'\n", s->mime_boundary);
}
}
}
return s;
}
static int
lws_urldecode_s_process(struct lws_urldecode_stateful *s, const char *in, int len)
{
int n, m, hit = 0;
char sum = 0, c;
while (len--) {
if (s->pos == s->out_len - s->mp - 1) {
if (s->output(s->data, s->name, &s->out, s->pos, 0))
return -1;
s->pos = 0;
}
switch (s->state) {
/* states for url arg style */
case US_NAME:
s->inside_quote = 0;
if (*in == '=') {
s->name[s->pos] = '\0';
s->pos = 0;
s->state = US_IDLE;
in++;
continue;
}
if (*in == '&') {
s->name[s->pos] = '\0';
if (s->output(s->data, s->name, &s->out, s->pos, 1))
return -1;
s->pos = 0;
s->state = US_IDLE;
in++;
continue;
}
if (s->pos >= sizeof(s->name) - 1) {
lwsl_notice("Name too long\n");
return -1;
}
s->name[s->pos++] = *in++;
break;
case US_IDLE:
if (*in == '%') {
s->state++;
in++;
continue;
}
if (*in == '&') {
s->out[s->pos] = '\0';
if (s->output(s->data, s->name, &s->out, s->pos, 1))
return -1;
s->pos = 0;
s->state = US_NAME;
in++;
continue;
}
if (*in == '+') {
in++;
s->out[s->pos++] = ' ';
continue;
}
s->out[s->pos++] = *in++;
break;
case US_PC1:
n = char_to_hex(*in);
if (n < 0)
return -1;
in++;
sum = n << 4;
s->state++;
break;
case US_PC2:
n = char_to_hex(*in);
if (n < 0)
return -1;
in++;
s->out[s->pos++] = sum | n;
s->state = US_IDLE;
break;
/* states for multipart / mime style */
case MT_LOOK_BOUND_IN:
if (*in == s->mime_boundary[s->mp] &&
s->mime_boundary[s->mp]) {
in++;
s->mp++;
if (!s->mime_boundary[s->mp]) {
s->mp = 0;
s->state = MT_IGNORE1;
if (s->pos)
if (s->output(s->data, s->name,
&s->out, s->pos, 1))
return -1;
s->pos = 0;
s->content_disp[0] = '\0';
s->name[0] = '\0';
s->content_disp_filename[0] = '\0';
s->boundary_real_crlf = 1;
}
continue;
}
if (s->mp) {
n = 0;
if (!s->boundary_real_crlf)
n = 2;
memcpy(s->out + s->pos, s->mime_boundary + n, s->mp - n);
s->pos += s->mp;
}
s->out[s->pos++] = *in;
in++;
s->mp = 0;
break;
case MT_HNAME:
m = 0;
c =*in;
if (c >= 'A' && c <= 'Z')
c += 'a' - 'A';
for (n = 0; n < ARRAY_SIZE(mp_hdr); n++)
if (c == mp_hdr[n][s->mp]) {
m++;
hit = n;
}
in++;
if (!m) {
s->mp = 0;
continue;
}
s->mp++;
if (m != 1)
continue;
if (mp_hdr[hit][s->mp])
continue;
s->mp = 0;
s->temp[0] = '\0';
s->subname = 0;
if (hit == 2)
s->state = MT_LOOK_BOUND_IN;
else
s->state += hit + 1;
break;
case MT_DISP:
/* form-data; name="file"; filename="t.txt" */
if (*in == '\x0d') {
// lwsl_notice("disp: '%s', '%s', '%s'\n",
// s->content_disp, s->name,
// s->content_disp_filename);
if (s->content_disp_filename[0])
if (s->output(s->data, s->name,
&s->out, s->pos, LWS_UFS_OPEN))
return -1;
s->state = MT_IGNORE2;
goto done;
}
if (*in == ';') {
s->subname = 1;
s->temp[0] = '\0';
s->mp = 0;
goto done;
}
if (*in == '\"') {
s->inside_quote ^= 1;
goto done;
}
if (s->subname) {
if (*in == '=') {
s->temp[s->mp] = '\0';
s->subname = 0;
s->mp = 0;
goto done;
}
if (s->mp < sizeof(s->temp) - 1 &&
(*in != ' ' || s->inside_quote))
s->temp[s->mp++] = *in;
goto done;
}
if (!s->temp[0]) {
if (s->mp < sizeof(s->content_disp) - 1)
s->content_disp[s->mp++] = *in;
s->content_disp[s->mp] = '\0';
goto done;
}
if (!strcmp(s->temp, "name")) {
if (s->mp < sizeof(s->name) - 1)
s->name[s->mp++] = *in;
s->name[s->mp] = '\0';
goto done;
}
if (!strcmp(s->temp, "filename")) {
if (s->mp < sizeof(s->content_disp_filename) - 1)
s->content_disp_filename[s->mp++] = *in;
s->content_disp_filename[s->mp] = '\0';
goto done;
}
done:
in++;
break;
case MT_TYPE:
if (*in == '\x0d')
s->state = MT_IGNORE2;
else {
if (s->mp < sizeof(s->content_type) - 1)
s->content_type[s->mp++] = *in;
s->content_type[s->mp] = '\0';
}
in++;
break;
case MT_IGNORE1:
if (*in == '\x0d')
s->state = MT_IGNORE2;
in++;
break;
case MT_IGNORE2:
s->mp = 0;
if (*in == '\x0a')
s->state = MT_HNAME;
in++;
break;
}
}
return 0;
}
static int
lws_urldecode_s_destroy(struct lws_urldecode_stateful *s)
{
int ret = 0;
if (s->state != US_IDLE)
ret = -1;
if (!ret)
if (s->output(s->data, s->name, &s->out, s->pos, 1))
ret = -1;
lws_free(s);
return ret;
}
struct lws_spa {
struct lws_urldecode_stateful *s;
lws_spa_fileupload_cb opt_cb;
const char * const *param_names;
int count_params;
char **params;
int *param_length;
void *opt_data;
char *storage;
char *end;
int max_storage;
};
static int
lws_urldecode_spa_lookup(struct lws_spa *spa,
const char *name)
{
int n;
for (n = 0; n < spa->count_params; n++)
if (!strcmp(spa->param_names[n], name))
return n;
return -1;
}
static int
lws_urldecode_spa_cb(void *data, const char *name, char **buf, int len,
int final)
{
struct lws_spa *spa =
(struct lws_spa *)data;
int n;
if (spa->s->content_disp_filename[0]) {
if (spa->opt_cb) {
n = spa->opt_cb(spa->opt_data, name,
spa->s->content_disp_filename,
*buf, len, final);
if (n < 0)
return -1;
}
return 0;
}
n = lws_urldecode_spa_lookup(spa, name);
if (n == -1 || !len) /* unrecognized */
return 0;
if (!spa->params[n])
spa->params[n] = *buf;
if ((*buf) + len >= spa->end) {
lwsl_notice("%s: exceeded storage\n", __func__);
return -1;
}
spa->param_length[n] += len;
/* move it on inside storage */
(*buf) += len;
*((*buf)++) = '\0';
spa->s->out_len -= len + 1;
return 0;
}
LWS_VISIBLE LWS_EXTERN struct lws_spa *
lws_spa_create(struct lws *wsi, const char * const *param_names,
int count_params, int max_storage,
lws_spa_fileupload_cb opt_cb, void *opt_data)
{
struct lws_spa *spa = lws_zalloc(sizeof(*spa));
if (!spa)
return NULL;
spa->param_names = param_names;
spa->count_params = count_params;
spa->max_storage = max_storage;
spa->opt_cb = opt_cb;
spa->opt_data = opt_data;
spa->storage = lws_malloc(max_storage);
if (!spa->storage)
goto bail2;
spa->end = spa->storage + max_storage - 1;
spa->params = lws_zalloc(sizeof(char *) * count_params);
if (!spa->params)
goto bail3;
spa->s = lws_urldecode_s_create(wsi, spa->storage, max_storage, spa,
lws_urldecode_spa_cb);
if (!spa->s)
goto bail4;
spa->param_length = lws_zalloc(sizeof(int) * count_params);
if (!spa->param_length)
goto bail5;
lwsl_notice("%s: Created SPA %p\n", __func__, spa);
return spa;
bail5:
lws_urldecode_s_destroy(spa->s);
bail4:
lws_free(spa->params);
bail3:
lws_free(spa->storage);
bail2:
lws_free(spa);
return NULL;
}
LWS_VISIBLE LWS_EXTERN int
lws_spa_process(struct lws_spa *ludspa, const char *in, int len)
{
if (!ludspa) {
lwsl_err("%s: NULL spa\n");
return -1;
}
return lws_urldecode_s_process(ludspa->s, in, len);
}
LWS_VISIBLE LWS_EXTERN int
lws_spa_get_length(struct lws_spa *ludspa, int n)
{
if (n >= ludspa->count_params)
return 0;
return ludspa->param_length[n];
}
LWS_VISIBLE LWS_EXTERN const char *
lws_spa_get_string(struct lws_spa *ludspa, int n)
{
if (n >= ludspa->count_params)
return NULL;
return ludspa->params[n];
}
LWS_VISIBLE LWS_EXTERN int
lws_spa_finalize(struct lws_spa *spa)
{
if (spa->s) {
lws_urldecode_s_destroy(spa->s);
spa->s = NULL;
}
return 0;
}
LWS_VISIBLE LWS_EXTERN int
lws_spa_destroy(struct lws_spa *spa)
{
int n = 0;
lwsl_notice("%s: destroy spa %p\n", __func__, spa);
if (spa->s)
lws_urldecode_s_destroy(spa->s);
lwsl_debug("%s\n", __func__);
lws_free(spa->param_length);
lws_free(spa->params);
lws_free(spa->storage);
lws_free(spa);
return n;
}
LWS_VISIBLE LWS_EXTERN int
lws_chunked_html_process(struct lws_process_html_args *args,
struct lws_process_html_state *s)
{
char *sp, buffer[32];
const char *pc;
int old_len, n;
/* do replacements */
sp = args->p;
old_len = args->len;
args->len = 0;
s->start = sp;
while (sp < args->p + old_len) {
if (args->len + 7 >= args->max_len) {
lwsl_err("Used up interpret padding\n");
return -1;
}
if ((!s->pos && *sp == '$') || s->pos) {
int hits = 0, hit = 0;
if (!s->pos)
s->start = sp;
s->swallow[s->pos++] = *sp;
if (s->pos == sizeof(s->swallow))
goto skip;
for (n = 0; n < s->count_vars; n++)
if (!strncmp(s->swallow, s->vars[n], s->pos)) {
hits++;
hit = n;
}
if (!hits) {
skip:
s->swallow[s->pos] = '\0';
memcpy(s->start, s->swallow, s->pos);
args->len++;
s->pos = 0;
sp = s->start + 1;
continue;
}
if (hits == 1 && s->pos == strlen(s->vars[hit])) {
pc = s->replace(s->data, hit);
if (!pc)
pc = "NULL";
n = strlen(pc);
s->swallow[s->pos] = '\0';
if (n != s->pos) {
memmove(s->start + n,
s->start + s->pos,
old_len - (sp - args->p));
old_len += (n - s->pos) + 1;
}
memcpy(s->start, pc, n);
args->len++;
sp = s->start + 1;
s->pos = 0;
}
sp++;
continue;
}
args->len++;
sp++;
}
/* no space left for final chunk trailer */
if (args->final && args->len + 7 >= args->max_len)
return -1;
n = sprintf(buffer, "%X\x0d\x0a", args->len);
args->p -= n;
memcpy(args->p, buffer, n);
args->len += n;
if (args->final) {
sp = args->p + args->len;
*sp++ = '\x0d';
*sp++ = '\x0a';
*sp++ = '0';
*sp++ = '\x0d';
*sp++ = '\x0a';
*sp++ = '\x0d';
*sp++ = '\x0a';
args->len += 7;
} else {
sp = args->p + args->len;
*sp++ = '\x0d';
*sp++ = '\x0a';
args->len += 2;
}
return 0;
}
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