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libwebsockets/lib/roles/http/server/server.c
Andy Green 1d2094996e refactor: absorb other caches into buflist 
1) Remove the whole ah rxbuf and put things on to the wsi buflist

This eliminates the whole detachability thing based on ah rxbuf
state... ah can always be detached.

2) Remove h2 scratch and put it on the wsi buflist

3) Remove preamble_rx and use the wsi buflist

This was used in the case adopted sockets had already been read.


Basically there are now only three forced service scenarios

 - something in buflist (and not in state LRS_DEFERRING_ACTION)

 - tls layer has buffered rx

 - extension has buffered rx

This is a net removal of around 400 lines of special-casing.
2018-04-20 07:13:05 +08:00

2459 lines
61 KiB
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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010-2018 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"
const char * const method_names[] = {
"GET", "POST", "OPTIONS", "PUT", "PATCH", "DELETE", "CONNECT", "HEAD",
#ifdef LWS_WITH_HTTP2
":path",
#endif
};
/*
* return 0: all done
* 1: nonfatal error
* <0: fatal error
*/
int
lws_context_init_server(struct lws_context_creation_info *info,
struct lws_vhost *vhost)
{
int n, opt = 1, limit = 1;
#if defined(__linux__) && defined(SO_REUSEPORT)
int n1;
#endif
lws_sockfd_type sockfd;
struct lws_vhost *vh;
struct lws *wsi;
int m = 0, is;
(void)method_names;
(void)opt;
if (info) {
vhost->iface = info->iface;
vhost->listen_port = info->port;
}
/* set up our external listening socket we serve on */
if (vhost->listen_port == CONTEXT_PORT_NO_LISTEN ||
vhost->listen_port == CONTEXT_PORT_NO_LISTEN_SERVER)
return 0;
vh = vhost->context->vhost_list;
while (vh) {
if (vh->listen_port == vhost->listen_port) {
if (((!vhost->iface && !vh->iface) ||
(vhost->iface && vh->iface &&
!strcmp(vhost->iface, vh->iface))) &&
vh->lserv_wsi
) {
lwsl_notice(" using listen skt from vhost %s\n",
vh->name);
return 0;
}
}
vh = vh->vhost_next;
}
if (vhost->iface) {
/*
* let's check before we do anything else about the disposition
* of the interface he wants to bind to...
*/
is = lws_socket_bind(vhost, LWS_SOCK_INVALID, vhost->listen_port, vhost->iface);
lwsl_debug("initial if check says %d\n", is);
deal:
lws_context_lock(vhost->context);
lws_start_foreach_llp(struct lws_vhost **, pv,
vhost->context->no_listener_vhost_list) {
if (is >= LWS_ITOSA_USABLE && *pv == vhost) {
/* on the list and shouldn't be: remove it */
lwsl_debug("deferred iface: removing vh %s\n", (*pv)->name);
*pv = vhost->no_listener_vhost_list;
vhost->no_listener_vhost_list = NULL;
goto done_list;
}
if (is < LWS_ITOSA_USABLE && *pv == vhost)
goto done_list;
} lws_end_foreach_llp(pv, no_listener_vhost_list);
/* not on the list... */
if (is < LWS_ITOSA_USABLE) {
/* ... but needs to be: so add it */
lwsl_debug("deferred iface: adding vh %s\n", vhost->name);
vhost->no_listener_vhost_list = vhost->context->no_listener_vhost_list;
vhost->context->no_listener_vhost_list = vhost;
}
done_list:
lws_context_unlock(vhost->context);
switch (is) {
default:
break;
case LWS_ITOSA_NOT_EXIST:
/* can't add it */
if (info) /* first time */
lwsl_err("VH %s: iface %s port %d DOESN'T EXIST\n",
vhost->name, vhost->iface, vhost->listen_port);
return 1;
case LWS_ITOSA_NOT_USABLE:
/* can't add it */
if (info) /* first time */
lwsl_err("VH %s: iface %s port %d NOT USABLE\n",
vhost->name, vhost->iface, vhost->listen_port);
return 1;
}
}
(void)n;
#if defined(__linux__)
limit = vhost->context->count_threads;
#endif
for (m = 0; m < limit; m++) {
#ifdef LWS_WITH_UNIX_SOCK
if (LWS_UNIX_SOCK_ENABLED(vhost))
sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
else
#endif
#ifdef LWS_WITH_IPV6
if (LWS_IPV6_ENABLED(vhost))
sockfd = socket(AF_INET6, SOCK_STREAM, 0);
else
#endif
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd == LWS_SOCK_INVALID) {
lwsl_err("ERROR opening socket\n");
return 1;
}
#if !defined(LWS_WITH_ESP32)
#if (defined(WIN32) || defined(_WIN32)) && defined(SO_EXCLUSIVEADDRUSE)
/*
* only accept that we are the only listener on the port
* https://msdn.microsoft.com/zh-tw/library/
* windows/desktop/ms740621(v=vs.85).aspx
*
* for lws, to match Linux, we default to exclusive listen
*/
if (!lws_check_opt(vhost->options,
LWS_SERVER_OPTION_ALLOW_LISTEN_SHARE)) {
if (setsockopt(sockfd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE,
(const void *)&opt, sizeof(opt)) < 0) {
lwsl_err("reuseaddr failed\n");
compatible_close(sockfd);
return -1;
}
} else
#endif
/*
* allow us to restart even if old sockets in TIME_WAIT
*/
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
(const void *)&opt, sizeof(opt)) < 0) {
lwsl_err("reuseaddr failed\n");
compatible_close(sockfd);
return -1;
}
#if defined(LWS_WITH_IPV6) && defined(IPV6_V6ONLY)
if (LWS_IPV6_ENABLED(vhost) &&
vhost->options & LWS_SERVER_OPTION_IPV6_V6ONLY_MODIFY) {
int value = (vhost->options &
LWS_SERVER_OPTION_IPV6_V6ONLY_VALUE) ? 1 : 0;
if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
(const void*)&value, sizeof(value)) < 0) {
compatible_close(sockfd);
return -1;
}
}
#endif
#if defined(__linux__) && defined(SO_REUSEPORT)
n1 = lws_check_opt(vhost->options,
LWS_SERVER_OPTION_ALLOW_LISTEN_SHARE);
/* keep coverity happy */
#if LWS_MAX_SMP > 1
n = 1;
#else
n = n1;
#endif
if (n && 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);
is = lws_socket_bind(vhost, sockfd, vhost->listen_port, vhost->iface);
/*
* There is a race where the network device may come up and then
* go away and fail here. So correctly handle unexpected failure
* here despite we earlier confirmed it.
*/
if (is < 0) {
lwsl_info("%s: lws_socket_bind says %d\n", __func__, is);
compatible_close(sockfd);
goto deal;
}
vhost->listen_port = is;
lwsl_debug("%s: lws_socket_bind says %d\n", __func__, is);
wsi = lws_zalloc(sizeof(struct lws), "listen wsi");
if (wsi == NULL) {
lwsl_err("Out of mem\n");
goto bail;
}
wsi->context = vhost->context;
wsi->desc.sockfd = sockfd;
lws_role_transition(wsi, 0, LRS_UNCONNECTED, &role_ops_listen);
wsi->protocol = vhost->protocols;
wsi->tsi = m;
wsi->vhost = vhost;
wsi->listener = 1;
#ifdef LWS_WITH_LIBUV
if (LWS_LIBUV_ENABLED(vhost->context))
lws_uv_initvhost(vhost, wsi);
#endif
if (__insert_wsi_socket_into_fds(vhost->context, wsi)) {
lwsl_notice("inserting wsi socket into fds failed\n");
goto bail;
}
vhost->context->count_wsi_allocated++;
vhost->lserv_wsi = wsi;
n = listen(wsi->desc.sockfd, LWS_SOMAXCONN);
if (n < 0) {
lwsl_err("listen failed with error %d\n", LWS_ERRNO);
vhost->lserv_wsi = NULL;
vhost->context->count_wsi_allocated--;
__remove_wsi_socket_from_fds(wsi);
goto bail;
}
} /* for each thread able to independently listen */
if (!lws_check_opt(vhost->context->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS)) {
#ifdef LWS_WITH_UNIX_SOCK
if (LWS_UNIX_SOCK_ENABLED(vhost))
lwsl_info(" Listening on \"%s\"\n", vhost->iface);
else
#endif
lwsl_info(" Listening on port %d\n", vhost->listen_port);
}
return 0;
bail:
compatible_close(sockfd);
return -1;
}
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 = (int)strlen(servername);
colon = n;
p = strchr(servername, ':');
if (p)
colon = lws_ptr_diff(p, servername);
/* Priotity 1: 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;
}
/*
* Priority 2: 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 = (int)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;
}
/* Priority 3: match the first vhost on our port */
vhost = context->vhost_list;
while (vhost) {
if (port == vhost->listen_port) {
lwsl_info("vhost match to %s based on port %d\n",
vhost->name, port);
return vhost;
}
vhost = vhost->vhost_next;
}
/* no match */
return NULL;
}
LWS_VISIBLE LWS_EXTERN const char *
lws_get_mimetype(const char *file, const struct lws_http_mount *m)
{
int n = (int)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], ".svg"))
return "image/svg+xml";
if (!strcmp(&file[n - 4], ".ttf"))
return "application/x-font-ttf";
if (!strcmp(&file[n - 4], ".otf"))
return "application/font-woff";
if (!strcmp(&file[n - 5], ".woff"))
return "application/font-woff";
if (!strcmp(&file[n - 4], ".xml"))
return "application/xml";
while (pvo) {
if (pvo->name[0] == '*') /* ie, match anything */
return pvo->value;
if (!strcmp(&file[n - strlen(pvo->name)], pvo->name))
return pvo->value;
pvo = pvo->next;
}
return NULL;
}
static lws_fop_flags_t
lws_vfs_prepare_flags(struct lws *wsi)
{
lws_fop_flags_t f = 0;
if (!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_ACCEPT_ENCODING))
return f;
if (strstr(lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_ACCEPT_ENCODING),
"gzip")) {
lwsl_info("client indicates GZIP is acceptable\n");
f |= LWS_FOP_FLAG_COMPR_ACCEPTABLE_GZIP;
}
return f;
}
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;
#if !defined(_WIN32_WCE)
const struct lws_plat_file_ops *fops;
const char *vpath;
lws_fop_flags_t fflags = LWS_O_RDONLY;
#if defined(WIN32) && defined(LWS_HAVE__STAT32I64)
struct _stat32i64 st;
#else
struct stat st;
#endif
int spin = 0;
#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) && !defined(LWS_WITH_ESP32)
size_t len;
#endif
int n;
wsi->handling_404 = 0;
if (!wsi->vhost)
return -1;
if (wsi->vhost->error_document_404 &&
!strcmp(uri, wsi->vhost->error_document_404))
wsi->handling_404 = 1;
lws_snprintf(path, sizeof(path) - 1, "%s/%s", origin, uri);
#if !defined(_WIN32_WCE)
fflags |= lws_vfs_prepare_flags(wsi);
do {
spin++;
fops = lws_vfs_select_fops(wsi->context->fops, path, &vpath);
if (wsi->http.fop_fd)
lws_vfs_file_close(&wsi->http.fop_fd);
wsi->http.fop_fd = fops->LWS_FOP_OPEN(wsi->context->fops,
path, vpath, &fflags);
if (!wsi->http.fop_fd) {
lwsl_info("%s: Unable to open '%s': errno %d\n",
__func__, path, errno);
return -1;
}
/* if it can't be statted, don't try */
if (fflags & LWS_FOP_FLAG_VIRTUAL)
break;
#if defined(LWS_WITH_ESP32)
break;
#endif
#if !defined(WIN32)
if (fstat(wsi->http.fop_fd->fd, &st)) {
lwsl_info("unable to stat %s\n", path);
goto bail;
}
#else
#if defined(LWS_HAVE__STAT32I64)
if (_stat32i64(path, &st)) {
lwsl_info("unable to stat %s\n", path);
goto bail;
}
#else
if (stat(path, &st)) {
lwsl_info("unable to stat %s\n", path);
goto bail;
}
#endif
#endif
wsi->http.fop_fd->mod_time = (uint32_t)st.st_mtime;
fflags |= LWS_FOP_FLAG_MOD_TIME_VALID;
#if !defined(WIN32) && !defined(LWS_WITH_ESP32)
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);
lws_snprintf(path, sizeof(path) - 1, "%s", sym);
}
#endif
if ((S_IFMT & st.st_mode) == S_IFDIR) {
lwsl_debug("default filename append to dir\n");
lws_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, "%08llX%08lX",
(unsigned long long)lws_vfs_get_length(wsi->http.fop_fd),
(unsigned long)lws_vfs_get_mod_time(wsi->http.fop_fd));
/* disable ranges if IF_RANGE token invalid */
if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_IF_RANGE))
if (strcmp(sym, lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_IF_RANGE)))
/* differs - defeat Range: */
wsi->ah->frag_index[WSI_TOKEN_HTTP_RANGE] = 0;
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,
HTTP_STATUS_NOT_MODIFIED, &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 |
LWS_WRITE_H2_STREAM_END);
if (n != (p - start)) {
lwsl_err("_write returned %d from %ld\n", n,
(long)(p - start));
return -1;
}
lws_vfs_file_close(&wsi->http.fop_fd);
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\n", path);
goto bail;
}
if (!mimetype[0])
lwsl_debug("sending no mimetype for %s\n", path);
wsi->sending_chunked = 0;
/*
* check if this is in the list of file suffixes to be interpreted by
* a protocol
*/
while (pvo) {
n = (int)strlen(path);
if (n > (int)strlen(pvo->name) &&
!strcmp(&path[n - strlen(pvo->name)], pvo->name)) {
wsi->interpreting = 1;
if (!wsi->http2_substream)
wsi->sending_chunked = 1;
wsi->protocol_interpret_idx =
(char)(lws_intptr_t)pvo->value;
lwsl_info("want %s interpreted by %s\n", path,
wsi->vhost->protocols[
(int)(lws_intptr_t)(pvo->value)].name);
wsi->protocol = &wsi->vhost->protocols[
(int)(lws_intptr_t)(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 = lws_ptr_diff(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,
lws_ptr_diff(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) ||
(wsi->http2_substream &&
lws_hdr_total_length(wsi,
WSI_TOKEN_HTTP_COLON_PATH)) ||
hm->protocol) &&
hm->mountpoint_len > best)) {
best = hm->mountpoint_len;
hit = hm;
}
}
hm = hm->mount_next;
}
return hit;
}
#if !defined(LWS_WITH_ESP32)
static int
lws_find_string_in_file(const char *filename, const char *string, int stringlen)
{
char buf[128];
int fd, match = 0, pos = 0, n = 0, hit = 0;
fd = open(filename, O_RDONLY);
if (fd < 0) {
lwsl_err("can't open auth file: %s\n", filename);
return 0;
}
while (1) {
if (pos == n) {
n = read(fd, buf, sizeof(buf));
if (n <= 0) {
if (match == stringlen)
hit = 1;
break;
}
pos = 0;
}
if (match == stringlen) {
if (buf[pos] == '\r' || buf[pos] == '\n') {
hit = 1;
break;
}
match = 0;
}
if (buf[pos] == string[match])
match++;
else
match = 0;
pos++;
}
close(fd);
return hit;
}
#endif
static int
lws_unauthorised_basic_auth(struct lws *wsi)
{
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
unsigned char *start = pt->serv_buf + LWS_PRE,
*p = start, *end = p + 512;
char buf[64];
int n;
/* no auth... tell him it is required */
if (lws_add_http_header_status(wsi, HTTP_STATUS_UNAUTHORIZED, &p, end))
return -1;
n = lws_snprintf(buf, sizeof(buf), "Basic realm=\"lwsws\"");
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_WWW_AUTHENTICATE,
(unsigned char *)buf, 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 |
LWS_WRITE_H2_STREAM_END);
if (n < 0)
return -1;
return lws_http_transaction_completed(wsi);
}
int lws_clean_url(char *p)
{
if (p[0] == 'h' && p[1] == 't' && p[2] == 't' && p[3] == 'p') {
p += 4;
if (*p == 's')
p++;
if (*p == ':') {
p++;
if (*p == '/')
p++;
}
}
while (*p) {
if (p[0] == '/' && p[1] == '/') {
char *p1 = p;
while (*p1) {
*p1 = p1[1];
p1++;
}
continue;
}
p++;
}
return 0;
}
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,
WSI_TOKEN_CONNECT,
WSI_TOKEN_HEAD_URI,
#ifdef LWS_WITH_HTTP2
WSI_TOKEN_HTTP_COLON_PATH,
#endif
};
static int
lws_http_get_uri_and_method(struct lws *wsi, char **puri_ptr, int *puri_len)
{
int n, count = 0;
for (n = 0; n < (int)ARRAY_SIZE(methods); n++)
if (lws_hdr_total_length(wsi, methods[n]))
count++;
if (!count) {
lwsl_warn("Missing URI in HTTP request\n");
return -1;
}
if (count != 1 &&
!(wsi->http2_substream &&
lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_COLON_PATH))) {
lwsl_warn("multiple methods?\n");
return -1;
}
for (n = 0; n < (int)ARRAY_SIZE(methods); n++)
if (lws_hdr_total_length(wsi, methods[n])) {
*puri_ptr = lws_hdr_simple_ptr(wsi, methods[n]);
*puri_len = lws_hdr_total_length(wsi, methods[n]);
return n;
}
return -1;
}
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;
char http_version_str[10];
char http_conn_str[20];
int http_version_len;
char *uri_ptr = NULL, *s;
int uri_len = 0, meth;
static const char * const oprot[] = {
"http://", "https://"
};
meth = lws_http_get_uri_and_method(wsi, &uri_ptr, &uri_len);
if (meth < 0 || meth >= (int)ARRAY_SIZE(method_names))
goto bail_nuke_ah;
/* we insist on absolute paths */
if (!uri_ptr || uri_ptr[0] != '/') {
lws_return_http_status(wsi, HTTP_STATUS_FORBIDDEN, NULL);
goto bail_nuke_ah;
}
lwsl_info("Method: '%s' (%d), request for '%s'\n", method_names[meth],
meth, uri_ptr);
if (wsi->role_ops && wsi->role_ops->check_upgrades)
switch (wsi->role_ops->check_upgrades(wsi)) {
case LWS_UPG_RET_DONE:
return 0;
case LWS_UPG_RET_CONTINUE:
break;
case LWS_UPG_RET_BAIL:
goto bail_nuke_ah;
}
if (lws_ensure_user_space(wsi))
goto bail_nuke_ah;
/* HTTP header had a content length? */
wsi->http.rx_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->http.rx_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->http.rx_content_length = atoll(content_length_str);
}
if (wsi->http2_substream) {
wsi->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->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->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_WITH_TLS
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
lws_prepare_access_log_info(wsi, uri_ptr, meth);
#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;
/*
* 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)) {
unsigned char *start = pt->serv_buf + LWS_PRE,
*p = start, *end = p + 512;
lwsl_debug("Doing 301 '%s' org %s\n", s, hit->origin);
/* > at start indicates deal with by redirect */
if (hit->origin_protocol == LWSMPRO_REDIR_HTTP ||
hit->origin_protocol == LWSMPRO_REDIR_HTTPS)
n = lws_snprintf((char *)end, 256, "%s%s",
oprot[hit->origin_protocol & 1],
hit->origin);
else {
if (!lws_hdr_total_length(wsi, WSI_TOKEN_HOST)) {
if (!lws_hdr_total_length(wsi,
WSI_TOKEN_HTTP_COLON_AUTHORITY))
goto bail_nuke_ah;
n = lws_snprintf((char *)end, 256,
"%s%s%s/", oprot[!!lws_is_ssl(wsi)],
lws_hdr_simple_ptr(wsi,
WSI_TOKEN_HTTP_COLON_AUTHORITY),
uri_ptr);
} else
n = lws_snprintf((char *)end, 256,
"%s%s%s/", oprot[!!lws_is_ssl(wsi)],
lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST),
uri_ptr);
}
lws_clean_url((char *)end);
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);
}
/* basic auth? */
if (hit->basic_auth_login_file) {
char b64[160], plain[(sizeof(b64) * 3) / 4];
int m;
/* Did he send auth? */
if (!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_AUTHORIZATION))
return lws_unauthorised_basic_auth(wsi);
n = HTTP_STATUS_FORBIDDEN;
m = lws_hdr_copy(wsi, b64, sizeof(b64),
WSI_TOKEN_HTTP_AUTHORIZATION);
if (m < 7) {
lwsl_err("b64 auth too long\n");
goto transaction_result_n;
}
b64[5] = '\0';
if (strcasecmp(b64, "Basic")) {
lwsl_err("auth missing basic: %s\n", b64);
goto transaction_result_n;
}
/* It'll be like Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l */
m = lws_b64_decode_string(b64 + 6, plain, sizeof(plain));
if (m < 0) {
lwsl_err("plain auth too long\n");
goto transaction_result_n;
}
if (!lws_find_string_in_file(hit->basic_auth_login_file,
plain, m)) {
lwsl_err("basic auth lookup failed\n");
return lws_unauthorised_basic_auth(wsi);
}
lwsl_info("basic auth accepted\n");
/* accept the auth */
}
#if defined(LWS_WITH_HTTP_PROXY)
/*
* The mount is a reverse proxy?
*/
if (hit->origin_protocol == LWSMPRO_HTTPS ||
hit->origin_protocol == LWSMPRO_HTTP) {
struct lws_client_connect_info i;
char ads[96], rpath[256], *pcolon, *pslash, *p;
int n, na;
memset(&i, 0, sizeof(i));
i.context = lws_get_context(wsi);
pcolon = strchr(hit->origin, ':');
pslash = strchr(hit->origin, '/');
if (!pslash) {
lwsl_err("Proxy mount origin '%s' must have /\n",
hit->origin);
return -1;
}
if (pcolon > pslash)
pcolon = NULL;
if (pcolon)
n = pcolon - hit->origin;
else
n = pslash - hit->origin;
if (n >= (int)sizeof(ads) - 2)
n = sizeof(ads) - 2;
memcpy(ads, hit->origin, n);
ads[n] = '\0';
i.address = ads;
i.port = 80;
if (hit->origin_protocol == LWSMPRO_HTTPS) {
i.port = 443;
i.ssl_connection = 1;
}
if (pcolon)
i.port = atoi(pcolon + 1);
lws_snprintf(rpath, sizeof(rpath) - 1, "/%s/%s", pslash + 1,
uri_ptr + hit->mountpoint_len);
lws_clean_url(rpath);
na = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_URI_ARGS);
if (na) {
p = rpath + strlen(rpath);
*p++ = '?';
lws_hdr_copy(wsi, p, &rpath[sizeof(rpath) - 1] - p,
WSI_TOKEN_HTTP_URI_ARGS);
while (--na) {
if (*p == '\0')
*p = '&';
p++;
}
}
i.path = rpath;
i.host = i.address;
i.origin = NULL;
i.method = "GET";
i.parent_wsi = wsi;
i.uri_replace_from = hit->origin;
i.uri_replace_to = hit->mountpoint;
lwsl_notice("proxying to %s port %d url %s, ssl %d, "
"from %s, to %s\n",
i.address, i.port, i.path, i.ssl_connection,
i.uri_replace_from, i.uri_replace_to);
if (!lws_client_connect_via_info(&i)) {
lwsl_err("proxy connect fail\n");
return 1;
}
return 0;
}
#endif
/*
* 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;
args.p = uri_ptr;
args.len = uri_len;
args.max_len = hit->auth_mask;
args.final = 0; /* used to signal callback dealt with it */
args.chunked = 0;
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 (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
};
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", __func__);
return -1;
}
goto deal_body;
}
#endif
n = (int)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 = 1;
if (hit->origin_protocol == LWSMPRO_FILE)
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 (lwsi_state(wsi) != LRS_ISSUING_FILE) {
/* Prepare to read body if we have a content length: */
lwsl_debug("wsi->http.rx_content_length %lld %d %d\n",
(long long)wsi->http.rx_content_length,
wsi->upgraded_to_http2, wsi->http2_substream);
if (wsi->http.rx_content_length > 0) {
struct lws_tokens ebuf;
int m;
lwsi_set_state(wsi, LRS_BODY);
lwsl_info("%s: %p: LRS_BODY state set (0x%x)\n",
__func__, wsi, wsi->wsistate);
wsi->http.rx_content_remain =
wsi->http.rx_content_length;
/*
* At this point we have transitioned from deferred
* action to expecting BODY on the stream wsi, if it's
* in a bundle like h2. So if the stream wsi has its
* own buflist, we need to deal with that first.
*/
while (1) {
ebuf.len = lws_buflist_next_segment_len(
&wsi->buflist, (uint8_t **)&ebuf.token);
if (!ebuf.len)
break;
lwsl_notice("%s: consuming %d\n", __func__, (int)ebuf.len);
m = lws_read_h1(wsi, (uint8_t *)ebuf.token, ebuf.len);
if (m < 0)
return -1;
lws_buflist_aware_consume(wsi, &ebuf, m, 1);
}
}
}
return 0;
bail_nuke_ah:
lws_header_table_detach(wsi, 1);
return 1;
transaction_result_n:
lws_return_http_status(wsi, n, NULL);
return lws_http_transaction_completed(wsi);
}
int
lws_handshake_server(struct lws *wsi, unsigned char **buf, size_t len)
{
struct lws_context *context = lws_get_context(wsi);
unsigned char *obuf = *buf;
#if defined(LWS_WITH_HTTP2)
char tbuf[128], *p;
#endif
size_t olen = len;
int n = 0, m, i;
if (len >= 10000000) {
lwsl_err("%s: assert: len %ld\n", __func__, (long)len);
assert(0);
}
if (!wsi->ah) {
lwsl_err("%s: assert: NULL ah\n", __func__);
assert(0);
}
while (len) {
if (!lwsi_role_server(wsi) || !lwsi_role_http(wsi)) {
lwsl_err("%s: bad wsi role 0x%x\n", __func__,
lwsi_role(wsi));
goto bail_nuke_ah;
}
i = (int)len;
m = lws_parse(wsi, *buf, &i);
lwsl_info("%s: parsed count %d\n", __func__, (int)len - i);
(*buf) += (int)len - i;
len = i;
if (m) {
if (m == 2) {
/*
* we are transitioning from http with
* an AH, to raw. Drop the ah and set
* the mode.
*/
raw_transition:
lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
lws_bind_protocol(wsi, &wsi->vhost->protocols[
wsi->vhost->
raw_protocol_index]);
lwsl_info("transition to raw vh %s prot %d\n",
wsi->vhost->name,
wsi->vhost->raw_protocol_index);
if ((wsi->protocol->callback)(wsi,
LWS_CALLBACK_RAW_ADOPT,
wsi->user_space, NULL, 0))
goto bail_nuke_ah;
lws_role_transition(wsi, 0, LRS_ESTABLISHED,
&role_ops_raw_skt);
lws_header_table_detach(wsi, 1);
if (m == 2 && (wsi->protocol->callback)(wsi,
LWS_CALLBACK_RAW_RX,
wsi->user_space, obuf, olen))
return 1;
return 0;
}
lwsl_info("lws_parse failed\n");
goto bail_nuke_ah;
}
if (wsi->ah->parser_state != WSI_PARSING_COMPLETE)
continue;
lwsl_parser("%s: lws_parse sees parsing complete\n", __func__);
/* 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");
if (!lwsi_role_h2(wsi) || !lwsi_role_server(wsi)) {
wsi->vhost->conn_stats.h1_trans++;
if (!wsi->conn_stat_done) {
wsi->vhost->conn_stats.h1_conn++;
wsi->conn_stat_done = 1;
}
}
/* check for unwelcome guests */
if (wsi->context->reject_service_keywords) {
const struct lws_protocol_vhost_options *rej =
wsi->context->reject_service_keywords;
char ua[384], *msg = NULL;
if (lws_hdr_copy(wsi, ua, sizeof(ua) - 1,
WSI_TOKEN_HTTP_USER_AGENT) > 0) {
#ifdef LWS_WITH_ACCESS_LOG
char *uri_ptr = NULL;
int meth, uri_len;
#endif
ua[sizeof(ua) - 1] = '\0';
while (rej) {
if (!strstr(ua, rej->name)) {
rej = rej->next;
continue;
}
msg = strchr(rej->value, ' ');
if (msg)
msg++;
lws_return_http_status(wsi,
atoi(rej->value), msg);
#ifdef LWS_WITH_ACCESS_LOG
meth = lws_http_get_uri_and_method(wsi,
&uri_ptr, &uri_len);
if (meth >= 0)
lws_prepare_access_log_info(wsi,
uri_ptr, meth);
/* wsi close will do the log */
#endif
wsi->vhost->conn_stats.rejected++;
/*
* We don't want anything from
* this rejected guy. Follow
* the close flow, not the
* transaction complete flow.
*/
goto bail_nuke_ah;
}
}
}
if (lws_hdr_total_length(wsi, WSI_TOKEN_CONNECT)) {
lwsl_info("Changing to RAW mode\n");
m = 0;
goto raw_transition;
}
lwsi_set_state(wsi, LRS_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->conn_stats.ws_upg++;
lwsl_info("Upgrade to ws\n");
goto upgrade_ws;
}
#if defined(LWS_WITH_HTTP2)
if (!strcasecmp(lws_hdr_simple_ptr(wsi,
WSI_TOKEN_UPGRADE),
"h2c")) {
wsi->vhost->conn_stats.h2_upg++;
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");
lwsi_set_state(wsi, LRS_ESTABLISHED);
wsi->http.fop_fd = NULL;
lwsl_debug("%s: wsi %p: ah %p\n", __func__, (void *)wsi,
(void *)wsi->ah);
n = lws_http_action(wsi);
return n;
#if defined(LWS_WITH_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, tbuf, sizeof(tbuf));
if (n < 0) {
lwsl_parser("HTTP2_SETTINGS too long\n");
return 1;
}
/* adopt the header info */
if (!wsi->h2.h2n) {
wsi->h2.h2n = lws_zalloc(sizeof(*wsi->h2.h2n),
"h2n");
if (!wsi->h2.h2n)
return 1;
}
lws_h2_init(wsi);
/* HTTP2 union */
lws_h2_settings(wsi, &wsi->h2.h2n->set, (unsigned char *)tbuf, n);
lws_hpack_dynamic_size(wsi, wsi->h2.h2n->set.s[
H2SET_HEADER_TABLE_SIZE]);
strcpy(tbuf, "HTTP/1.1 101 Switching Protocols\x0d\x0a"
"Connection: Upgrade\x0d\x0a"
"Upgrade: h2c\x0d\x0a\x0d\x0a");
m = (int)strlen(tbuf);
n = lws_issue_raw(wsi, (unsigned char *)tbuf, m);
if (n != m) {
lwsl_debug("http2 switch: ERROR writing to socket\n");
return 1;
}
lwsi_set_state(wsi, LRS_H2_AWAIT_PREFACE);
wsi->upgraded_to_http2 = 1;
return 0;
#endif
upgrade_ws:
if (lws_process_ws_upgrade(wsi))
goto bail_nuke_ah;
return 0;
} /* while all chars are handled */
return 0;
bail_nuke_ah:
/* drop the header info */
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), "new server wsi");
if (new_wsi == NULL) {
lwsl_err("Out of memory for new connection\n");
return NULL;
}
new_wsi->tsi = n;
lwsl_debug("new wsi %p joining vhost %s, tsi %d\n", new_wsi,
vhost->name, 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;
/* initialize the instance struct */
lwsi_set_state(new_wsi, LRS_UNCONNECTED);
new_wsi->hdr_parsing_completed = 0;
#ifdef LWS_WITH_TLS
new_wsi->use_ssl = LWS_SSL_ENABLED(vhost);
#endif
/*
* these can only be set once the protocol is known
* we set an un-established 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->desc.sockfd = LWS_SOCK_INVALID;
new_wsi->position_in_fds_table = -1;
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;
lwsl_info("%s: wsi %p\n", __func__, wsi);
lws_access_log(wsi);
if (!wsi->hdr_parsing_completed) {
lwsl_notice("%s: ignoring, ah parsing incomplete\n", __func__);
return 0;
}
/* if we can't go back to accept new headers, drop the connection */
if (wsi->http2_substream)
return 0;
if (wsi->seen_zero_length_recv)
return 1;
if (wsi->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, but because we have no
* idea about the wsi writability, we make put it in a holding state
* until we can verify POLLOUT. The part of this that confirms POLLOUT
* with no partials is in lws_server_socket_service() below.
*/
lwsl_debug("%s: setting DEF_ACT from 0x%x\n", __func__, wsi->wsistate);
lwsi_set_state(wsi, LRS_DEFERRING_ACTION);
wsi->http.tx_content_length = 0;
wsi->http.tx_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->ah) {
// lws_buflist_describe(&wsi->buflist, wsi);
if (!lws_buflist_next_segment_len(&wsi->buflist, NULL)) {
lwsl_debug("%s: nothing in buflist so detaching ah\n", __func__);
lws_header_table_detach(wsi, 1);
#ifdef LWS_WITH_TLS
/*
* additionally... if we are hogging an SSL instance
* with no pending pipelined headers (or ah now), and
* SSL is scarce, drop this connection without waiting
*/
if (wsi->vhost->use_ssl &&
wsi->context->simultaneous_ssl_restriction &&
wsi->context->simultaneous_ssl ==
wsi->context->simultaneous_ssl_restriction) {
lwsl_info("%s: simultaneous_ssl_restriction\n",
__func__);
return 1;
}
#endif
} else {
lwsl_debug("%s: resetting and keeping ah as more pipeline stuff available\n", __func__);
lws_header_table_reset(wsi, 0);
/*
* If we kept the ah, we should restrict the amount
* of time we are willing to keep it. Otherwise it
* will be bound the whole time the connection remains
* open.
*/
lws_set_timeout(wsi, PENDING_TIMEOUT_HOLDING_AH,
wsi->vhost->keepalive_timeout);
}
/* If we're (re)starting on headers, need other implied init */
if (wsi->ah)
wsi->ah->ues = URIES_IDLE;
lwsi_set_state(wsi, LRS_ESTABLISHED);
} else
if (lws_buflist_next_segment_len(&wsi->buflist, NULL))
if (lws_header_table_attach(wsi, 0))
lwsl_debug("acquired ah\n");
lwsl_info("%s: %p: keep-alive await new transaction\n", __func__, wsi);
lws_callback_on_writable(wsi);
return 0;
}
/* if not a socket, it's a raw, non-ssl file descriptor */
LWS_VISIBLE struct lws *
lws_adopt_descriptor_vhost(struct lws_vhost *vh, lws_adoption_type type,
lws_sock_file_fd_type fd, const char *vh_prot_name,
struct lws *parent)
{
struct lws_context *context = vh->context;
struct lws *new_wsi;
struct lws_context_per_thread *pt;
int n, ssl = 0;
#if defined(LWS_WITH_PEER_LIMITS)
struct lws_peer *peer = NULL;
if (type & LWS_ADOPT_SOCKET && !(type & LWS_ADOPT_WS_PARENTIO)) {
peer = lws_get_or_create_peer(vh, fd.sockfd);
if (peer && context->ip_limit_wsi &&
peer->count_wsi >= context->ip_limit_wsi) {
lwsl_notice("Peer reached wsi limit %d\n",
context->ip_limit_wsi);
lws_stats_atomic_bump(context, &context->pt[0],
LWSSTATS_C_PEER_LIMIT_WSI_DENIED, 1);
return NULL;
}
}
#endif
new_wsi = lws_create_new_server_wsi(vh);
if (!new_wsi) {
if (type & LWS_ADOPT_SOCKET && !(type & LWS_ADOPT_WS_PARENTIO))
compatible_close(fd.sockfd);
return NULL;
}
#if defined(LWS_WITH_PEER_LIMITS)
if (peer)
lws_peer_add_wsi(context, peer, new_wsi);
#endif
pt = &context->pt[(int)new_wsi->tsi];
lws_stats_atomic_bump(context, pt, LWSSTATS_C_CONNECTIONS, 1);
if (parent) {
new_wsi->parent = parent;
new_wsi->sibling_list = parent->child_list;
parent->child_list = new_wsi;
if (type & LWS_ADOPT_WS_PARENTIO)
new_wsi->parent_carries_io = 1;
}
new_wsi->desc = fd;
if (vh_prot_name) {
new_wsi->protocol = lws_vhost_name_to_protocol(new_wsi->vhost,
vh_prot_name);
if (!new_wsi->protocol) {
lwsl_err("Protocol %s not enabled on vhost %s\n",
vh_prot_name, new_wsi->vhost->name);
goto bail;
}
if (lws_ensure_user_space(new_wsi)) {
lwsl_notice("OOM trying to get user_space\n");
goto bail;
}
if (type & LWS_ADOPT_WS_PARENTIO) {
new_wsi->desc.sockfd = LWS_SOCK_INVALID;
lwsl_debug("binding to %s\n", new_wsi->protocol->name);
lws_bind_protocol(new_wsi, new_wsi->protocol);
lws_role_transition(new_wsi, LWSIFR_SERVER,
LRS_ESTABLISHED, &role_ops_ws);
/* allocate the ws struct for the wsi */
new_wsi->ws = lws_zalloc(sizeof(*new_wsi->ws), "ws struct");
if (!new_wsi->ws) {
lwsl_notice("OOM\n");
goto bail;
}
lws_server_init_wsi_for_ws(new_wsi);
return new_wsi;
}
} else
if (type & LWS_ADOPT_HTTP) {/* he will transition later */
new_wsi->protocol =
&vh->protocols[vh->default_protocol_index];
new_wsi->role_ops = &role_ops_h1;
}
else { /* this is the only time he will transition */
lws_bind_protocol(new_wsi,
&vh->protocols[vh->raw_protocol_index]);
lws_role_transition(new_wsi, 0, LRS_ESTABLISHED,
&role_ops_raw_skt);
}
if (type & LWS_ADOPT_SOCKET) { /* socket desc */
lwsl_debug("%s: new wsi %p, sockfd %d\n", __func__, new_wsi,
(int)(lws_intptr_t)fd.sockfd);
#if !defined(LWS_WITH_ESP32)
if (type & LWS_ADOPT_FLAG_UDP)
/*
* these can be >128 bytes, so just alloc for UDP
*/
new_wsi->udp = lws_malloc(sizeof(*new_wsi->udp),
"udp struct");
#endif
if (type & LWS_ADOPT_HTTP)
/* the transport is accepted...
* give him time to negotiate */
lws_set_timeout(new_wsi,
PENDING_TIMEOUT_ESTABLISH_WITH_SERVER,
context->timeout_secs);
} else /* file desc */
lwsl_debug("%s: new wsi %p, filefd %d\n", __func__, new_wsi,
(int)(lws_intptr_t)fd.filefd);
/*
* 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 the vhosts's default protocol,
* itself by default protocols[0]
*/
n = LWS_CALLBACK_SERVER_NEW_CLIENT_INSTANTIATED;
if (!(type & LWS_ADOPT_HTTP)) {
if (!(type & LWS_ADOPT_SOCKET))
n = LWS_CALLBACK_RAW_ADOPT_FILE;
else
n = LWS_CALLBACK_RAW_ADOPT;
}
if (!LWS_SSL_ENABLED(new_wsi->vhost) || !(type & LWS_ADOPT_ALLOW_SSL) ||
!(type & LWS_ADOPT_SOCKET)) {
/* non-SSL */
if (!(type & LWS_ADOPT_HTTP)) {
if (!(type & LWS_ADOPT_SOCKET))
lws_role_transition(new_wsi, 0, LRS_UNCONNECTED,
&role_ops_raw_file);
else
lws_role_transition(new_wsi, 0, LRS_UNCONNECTED,
&role_ops_raw_skt);
} else
lws_role_transition(new_wsi, LWSIFR_SERVER,
LRS_HEADERS, &role_ops_h1);
} else {
/* SSL */
if (!(type & LWS_ADOPT_HTTP))
lws_role_transition(new_wsi, 0, LRS_SSL_INIT,
&role_ops_raw_skt);
else
lws_role_transition(new_wsi, LWSIFR_SERVER,
LRS_SSL_INIT, &role_ops_h1);
ssl = 1;
}
lwsl_debug("new wsi wsistate 0x%x\n", new_wsi->wsistate);
lws_libev_accept(new_wsi, new_wsi->desc);
lws_libuv_accept(new_wsi, new_wsi->desc);
lws_libevent_accept(new_wsi, new_wsi->desc);
if (!ssl) {
lws_pt_lock(pt, __func__);
if (__insert_wsi_socket_into_fds(context, new_wsi)) {
lws_pt_unlock(pt);
lwsl_err("%s: fail inserting socket\n", __func__);
goto fail;
}
lws_pt_unlock(pt);
} else
if (lws_server_socket_service_ssl(new_wsi, fd.sockfd)) {
lwsl_info("%s: fail ssl negotiation\n", __func__);
goto fail;
}
/*
* by deferring callback to this point, after insertion to fds,
* lws_callback_on_writable() can work from the callback
*/
if ((new_wsi->protocol->callback)(
new_wsi, n, new_wsi->user_space, NULL, 0))
goto fail;
if (type & LWS_ADOPT_HTTP) {
if (!lws_header_table_attach(new_wsi, 0))
lwsl_debug("Attached ah immediately\n");
else
lwsl_info("%s: waiting for ah\n", __func__);
}
lws_cancel_service_pt(new_wsi);
return new_wsi;
fail:
if (type & LWS_ADOPT_SOCKET)
lws_close_free_wsi(new_wsi, LWS_CLOSE_STATUS_NOSTATUS, "adopt skt fail");
return NULL;
bail:
lwsl_notice("%s: exiting on bail\n", __func__);
if (parent)
parent->child_list = new_wsi->sibling_list;
if (new_wsi->user_space)
lws_free(new_wsi->user_space);
lws_free(new_wsi);
compatible_close(fd.sockfd);
return NULL;
}
LWS_VISIBLE struct lws *
lws_adopt_socket_vhost(struct lws_vhost *vh, lws_sockfd_type accept_fd)
{
lws_sock_file_fd_type fd;
fd.sockfd = accept_fd;
return lws_adopt_descriptor_vhost(vh, LWS_ADOPT_SOCKET |
LWS_ADOPT_HTTP | LWS_ADOPT_ALLOW_SSL, fd, NULL, 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);
}
/* Common read-buffer adoption for lws_adopt_*_readbuf */
static struct lws*
adopt_socket_readbuf(struct lws *wsi, const char *readbuf, size_t len)
{
struct lws_context_per_thread *pt;
struct lws_pollfd *pfd;
if (!wsi)
return NULL;
if (!readbuf || len == 0)
return wsi;
if (lws_buflist_append_segment(&wsi->buflist, (const uint8_t *)readbuf, len) < 0)
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->ah || !lws_header_table_attach(wsi, 0)) {
lwsl_notice("%s: calling service on readbuf ah\n", __func__);
pt = &wsi->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(wsi->context, pfd, wsi->tsi))
/* service closed us */
return NULL;
return wsi;
}
lwsl_err("%s: deferring handling ah\n", __func__);
return wsi;
bail:
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS, "adopt skt readbuf fail");
return NULL;
}
LWS_VISIBLE struct lws *
lws_adopt_socket_readbuf(struct lws_context *context, lws_sockfd_type accept_fd,
const char *readbuf, size_t len)
{
return adopt_socket_readbuf(lws_adopt_socket(context, accept_fd),
readbuf, len);
}
LWS_VISIBLE struct lws *
lws_adopt_socket_vhost_readbuf(struct lws_vhost *vhost,
lws_sockfd_type accept_fd,
const char *readbuf, size_t len)
{
return adopt_socket_readbuf(lws_adopt_socket_vhost(vhost, accept_fd),
readbuf, len);
}
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];
#if defined(LWS_WITH_RANGES)
struct lws_range_parsing *rp = &wsi->http.range;
#endif
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;
lws_filepos_t total_content_length;
int ret = 0, cclen = 8, n = HTTP_STATUS_OK;
lws_fop_flags_t fflags = LWS_O_RDONLY;
#if defined(LWS_WITH_RANGES)
int ranges;
#endif
const struct lws_plat_file_ops *fops;
const char *vpath;
if (wsi->handling_404)
n = HTTP_STATUS_NOT_FOUND;
/*
* We either call the platform fops .open with first arg platform fops,
* or we call fops_zip .open with first arg platform fops, and fops_zip
* open will decide whether to switch to fops_zip or stay with fops_def.
*
* If wsi->http.fop_fd is already set, the caller already opened it
*/
if (!wsi->http.fop_fd) {
fops = lws_vfs_select_fops(wsi->context->fops, file, &vpath);
fflags |= lws_vfs_prepare_flags(wsi);
wsi->http.fop_fd = fops->LWS_FOP_OPEN(wsi->context->fops,
file, vpath, &fflags);
if (!wsi->http.fop_fd) {
lwsl_info("%s: Unable to open: '%s': errno %d\n",
__func__, file, errno);
if (lws_return_http_status(wsi, HTTP_STATUS_NOT_FOUND, NULL))
return -1;
return !wsi->http2_substream;
}
}
wsi->http.filelen = lws_vfs_get_length(wsi->http.fop_fd);
total_content_length = wsi->http.filelen;
#if defined(LWS_WITH_RANGES)
ranges = lws_ranges_init(wsi, rp, wsi->http.filelen);
lwsl_debug("Range count %d\n", ranges);
/*
* no ranges -> 200;
* 1 range -> 206 + Content-Type: normal; Content-Range;
* more -> 206 + Content-Type: multipart/byteranges
* Repeat the true Content-Type in each multipart header
* along with Content-Range
*/
if (ranges < 0) {
/* it means he expressed a range in Range:, but it was illegal */
lws_return_http_status(wsi, HTTP_STATUS_REQ_RANGE_NOT_SATISFIABLE,
NULL);
if (lws_http_transaction_completed(wsi))
return -1; /* <0 means just hang up */
lws_vfs_file_close(&wsi->http.fop_fd);
return 0; /* == 0 means we dealt with the transaction complete */
}
if (ranges)
n = HTTP_STATUS_PARTIAL_CONTENT;
#endif
if (lws_add_http_header_status(wsi, n, &p, end))
return -1;
if ((wsi->http.fop_fd->flags & (LWS_FOP_FLAG_COMPR_ACCEPTABLE_GZIP |
LWS_FOP_FLAG_COMPR_IS_GZIP)) ==
(LWS_FOP_FLAG_COMPR_ACCEPTABLE_GZIP | LWS_FOP_FLAG_COMPR_IS_GZIP)) {
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_CONTENT_ENCODING,
(unsigned char *)"gzip", 4, &p, end))
return -1;
lwsl_info("file is being provided in gzip\n");
}
if (
#if defined(LWS_WITH_RANGES)
ranges < 2 &&
#endif
content_type && content_type[0])
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_CONTENT_TYPE,
(unsigned char *)content_type,
(int)strlen(content_type),
&p, end))
return -1;
#if defined(LWS_WITH_RANGES)
if (ranges >= 2) { /* multipart byteranges */
lws_strncpy(wsi->http.multipart_content_type, content_type,
sizeof(wsi->http.multipart_content_type));
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_CONTENT_TYPE,
(unsigned char *)
"multipart/byteranges; "
"boundary=_lws",
20, &p, end))
return -1;
/*
* our overall content length has to include
*
* - (n + 1) x "_lws\r\n"
* - n x Content-Type: xxx/xxx\r\n
* - n x Content-Range: bytes xxx-yyy/zzz\r\n
* - n x /r/n
* - the actual payloads (aggregated in rp->agg)
*
* Precompute it for the main response header
*/
total_content_length = (lws_filepos_t)rp->agg +
6 /* final _lws\r\n */;
lws_ranges_reset(rp);
while (lws_ranges_next(rp)) {
n = lws_snprintf(cache_control, sizeof(cache_control),
"bytes %llu-%llu/%llu",
rp->start, rp->end, rp->extent);
total_content_length +=
6 /* header _lws\r\n */ +
/* Content-Type: xxx/xxx\r\n */
14 + strlen(content_type) + 2 +
/* Content-Range: xxxx\r\n */
15 + n + 2 +
2; /* /r/n */
}
lws_ranges_reset(rp);
lws_ranges_next(rp);
}
if (ranges == 1) {
total_content_length = (lws_filepos_t)rp->agg;
n = lws_snprintf(cache_control, sizeof(cache_control),
"bytes %llu-%llu/%llu",
rp->start, rp->end, rp->extent);
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_CONTENT_RANGE,
(unsigned char *)cache_control,
n, &p, end))
return -1;
}
wsi->http.range.inside = 0;
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_ACCEPT_RANGES,
(unsigned char *)"bytes", 5, &p, end))
return -1;
#endif
if (!wsi->http2_substream) {
if (!wsi->sending_chunked) {
if (lws_add_http_header_content_length(wsi,
total_content_length,
&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 (wsi->http.connection_type == HTTP_CONNECTION_KEEP_ALIVE)
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_CONNECTION,
(unsigned char *)"keep-alive", 10, &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 %ld\n", ret,
(long)(p - response));
return -1;
}
wsi->http.filepos = 0;
lwsi_set_state(wsi, LRS_ISSUING_FILE);
lws_callback_on_writable(wsi);
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 !defined(LWS_WITH_ESP32)
/* find canonical hostname */
gethostname((char *)context->canonical_hostname,
sizeof(context->canonical_hostname) - 1);
lwsl_info(" canonical_hostname = %s\n", context->canonical_hostname);
#else
(void)context;
#endif
}
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) - 1)
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 == (int)strlen(s->vars[hit])) {
pc = s->replace(s->data, hit);
if (!pc)
pc = "NULL";
n = (int)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++;
}
if (args->chunked) {
/* 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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