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godot/thirdparty/libwebsockets/roles/http/server/server.c

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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 "core/private.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
*
* REQUIRES CONTEXT LOCK HELD
*/
int
_lws_vhost_init_server(const struct lws_context_creation_info *info,
struct lws_vhost *vhost)
{
int n, opt = 1, limit = 1;
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_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:
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)
/* keep coverity happy */
#if LWS_MAX_SMP > 1
n = 1;
#else
n = lws_check_opt(vhost->options,
LWS_SERVER_OPTION_ALLOW_LISTEN_SHARE);
#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;
if (wsi->context->event_loop_ops->init_vhost_listen_wsi)
wsi->context->event_loop_ops->init_vhost_listen_wsi(wsi);
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);
}
// info->port = 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("%s: vhost match to %s based on port %d\n",
__func__, 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 defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
if (wsi->vhost->http.error_document_404 &&
!strcmp(uri, wsi->vhost->http.error_document_404))
wsi->handling_404 = 1;
#endif
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->http.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;
}
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
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->http.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;
}
#endif
#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->tls.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;
lwsi_set_state(wsi, LRS_DOING_TRANSACTION);
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 = (int)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;
if (lws_buflist_aware_consume(wsi, &ebuf, m, 1))
return -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->http.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->http.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")) {
#if defined(LWS_ROLE_WS)
wsi->vhost->conn_stats.ws_upg++;
lwsl_info("Upgrade to ws\n");
goto upgrade_ws;
#endif
}
#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("%s: %p: No upgrade\n", __func__, wsi);
lwsi_set_state(wsi, LRS_ESTABLISHED);
wsi->http.fop_fd = NULL;
lwsl_debug("%s: wsi %p: ah %p\n", __func__, (void *)wsi,
(void *)wsi->http.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
#if defined(LWS_ROLE_WS)
upgrade_ws:
if (lws_process_ws_upgrade(wsi))
goto bail_nuke_ah;
return 0;
#endif
} /* 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, int fixed_tsi)
{
struct lws *new_wsi;
int n = fixed_tsi;
if (n < 0)
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->tls.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 = LWS_NO_FDS_POS;
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_notice("%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: %p: setting DEF_ACT from 0x%x\n", __func__,
wsi, 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->http.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->http.ah) {
// lws_buflist_describe(&wsi->buflist, wsi);
if (!lws_buflist_next_segment_len(&wsi->buflist, NULL)) {
lwsl_info("%s: %p: nothing in buflist so detaching ah\n",
__func__, wsi);
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->tls.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_info("%s: %p: resetting and keeping ah as pipeline\n",
__func__, wsi);
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->http.ah)
wsi->http.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
n = -1;
if (parent)
n = parent->tsi;
new_wsi = lws_create_new_server_wsi(vh, n);
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 defined(LWS_ROLE_WS)
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;
}
#endif
} else
#if defined(LWS_ROLE_H1)
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
#endif
{ /* 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_ESTABLISHED,
&role_ops_raw_file);
else
lws_role_transition(new_wsi, 0, LRS_ESTABLISHED,
&role_ops_raw_skt);
}
#if defined(LWS_ROLE_H1)
else
lws_role_transition(new_wsi, LWSIFR_SERVER,
LRS_HEADERS, &role_ops_h1);
#endif
} else {
/* SSL */
if (!(type & LWS_ADOPT_HTTP))
lws_role_transition(new_wsi, 0, LRS_SSL_INIT,
&role_ops_raw_skt);
#if defined(LWS_ROLE_H1)
else
lws_role_transition(new_wsi, LWSIFR_SERVER,
LRS_SSL_INIT, &role_ops_h1);
#endif
ssl = 1;
}
lwsl_debug("new wsi wsistate 0x%x\n", new_wsi->wsistate);
if (context->event_loop_ops->accept)
context->event_loop_ops->accept(new_wsi);
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;
int n;
if (!wsi)
return NULL;
if (!readbuf || len == 0)
return wsi;
if (wsi->position_in_fds_table == LWS_NO_FDS_POS)
return wsi;
pt = &wsi->context->pt[(int)wsi->tsi];
n = lws_buflist_append_segment(&wsi->buflist, (const uint8_t *)readbuf, len);
if (n < 0)
goto bail;
if (n)
lws_dll_lws_add_front(&wsi->dll_buflist, &pt->dll_head_buflist);
/*
* 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->http.ah || !lws_header_table_attach(wsi, 0)) {
lwsl_notice("%s: calling service on readbuf ah\n", __func__);
/* 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 int lws_serve_http_file_fragment(struct lws *wsi)
{
struct lws_context *context = wsi->context;
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
struct lws_process_html_args args;
lws_filepos_t amount, poss;
unsigned char *p, *pstart;
#if defined(LWS_WITH_RANGES)
unsigned char finished = 0;
#endif
int n, m;
lwsl_debug("wsi->http2_substream %d\n", wsi->http2_substream);
do {
if (wsi->trunc_len) {
if (lws_issue_raw(wsi, wsi->trunc_alloc +
wsi->trunc_offset,
wsi->trunc_len) < 0) {
lwsl_info("%s: closing\n", __func__);
goto file_had_it;
}
break;
}
if (wsi->http.filepos == wsi->http.filelen)
goto all_sent;
n = 0;
pstart = pt->serv_buf + LWS_H2_FRAME_HEADER_LENGTH;
p = pstart;
#if defined(LWS_WITH_RANGES)
if (wsi->http.range.count_ranges && !wsi->http.range.inside) {
lwsl_notice("%s: doing range start %llu\n", __func__,
wsi->http.range.start);
if ((long long)lws_vfs_file_seek_cur(wsi->http.fop_fd,
wsi->http.range.start -
wsi->http.filepos) < 0)
goto file_had_it;
wsi->http.filepos = wsi->http.range.start;
if (wsi->http.range.count_ranges > 1) {
n = lws_snprintf((char *)p,
context->pt_serv_buf_size -
LWS_H2_FRAME_HEADER_LENGTH,
"_lws\x0d\x0a"
"Content-Type: %s\x0d\x0a"
"Content-Range: bytes %llu-%llu/%llu\x0d\x0a"
"\x0d\x0a",
wsi->http.multipart_content_type,
wsi->http.range.start,
wsi->http.range.end,
wsi->http.range.extent);
p += n;
}
wsi->http.range.budget = wsi->http.range.end -
wsi->http.range.start + 1;
wsi->http.range.inside = 1;
}
#endif
poss = context->pt_serv_buf_size - n - LWS_H2_FRAME_HEADER_LENGTH;
if (wsi->http.tx_content_length)
if (poss > wsi->http.tx_content_remain)
poss = wsi->http.tx_content_remain;
/*
* if there is a hint about how much we will do well to send at
* one time, restrict ourselves to only trying to send that.
*/
if (wsi->protocol->tx_packet_size &&
poss > wsi->protocol->tx_packet_size)
poss = wsi->protocol->tx_packet_size;
if (wsi->role_ops->tx_credit) {
lws_filepos_t txc = wsi->role_ops->tx_credit(wsi);
if (!txc) {
lwsl_info("%s: came here with no tx credit\n",
__func__);
return 0;
}
if (txc < poss)
poss = txc;
/*
* consumption of the actual payload amount sent will be
* handled when the role data frame is sent
*/
}
#if defined(LWS_WITH_RANGES)
if (wsi->http.range.count_ranges) {
if (wsi->http.range.count_ranges > 1)
poss -= 7; /* allow for final boundary */
if (poss > wsi->http.range.budget)
poss = wsi->http.range.budget;
}
#endif
if (wsi->sending_chunked) {
/* we need to drop the chunk size in here */
p += 10;
/* allow for the chunk to grow by 128 in translation */
poss -= 10 + 128;
}
if (lws_vfs_file_read(wsi->http.fop_fd, &amount, p, poss) < 0)
goto file_had_it; /* caller will close */
if (wsi->sending_chunked)
n = (int)amount;
else
n = lws_ptr_diff(p, pstart) + (int)amount;
lwsl_debug("%s: sending %d\n", __func__, n);
if (n) {
lws_set_timeout(wsi, PENDING_TIMEOUT_HTTP_CONTENT,
context->timeout_secs);
if (wsi->interpreting) {
args.p = (char *)p;
args.len = n;
args.max_len = (unsigned int)poss + 128;
args.final = wsi->http.filepos + n ==
wsi->http.filelen;
args.chunked = wsi->sending_chunked;
if (user_callback_handle_rxflow(
wsi->vhost->protocols[
(int)wsi->protocol_interpret_idx].callback,
wsi, LWS_CALLBACK_PROCESS_HTML,
wsi->user_space, &args, 0) < 0)
goto file_had_it;
n = args.len;
p = (unsigned char *)args.p;
} else
p = pstart;
#if defined(LWS_WITH_RANGES)
if (wsi->http.range.send_ctr + 1 ==
wsi->http.range.count_ranges && // last range
wsi->http.range.count_ranges > 1 && // was 2+ ranges (ie, multipart)
wsi->http.range.budget - amount == 0) {// final part
n += lws_snprintf((char *)pstart + n, 6,
"_lws\x0d\x0a"); // append trailing boundary
lwsl_debug("added trailing boundary\n");
}
#endif
m = lws_write(wsi, p, n,
wsi->http.filepos + amount == wsi->http.filelen ?
LWS_WRITE_HTTP_FINAL :
LWS_WRITE_HTTP
);
if (m < 0)
goto file_had_it;
wsi->http.filepos += amount;
#if defined(LWS_WITH_RANGES)
if (wsi->http.range.count_ranges >= 1) {
wsi->http.range.budget -= amount;
if (wsi->http.range.budget == 0) {
lwsl_notice("range budget exhausted\n");
wsi->http.range.inside = 0;
wsi->http.range.send_ctr++;
if (lws_ranges_next(&wsi->http.range) < 1) {
finished = 1;
goto all_sent;
}
}
}
#endif
if (m != n) {
/* adjust for what was not sent */
if (lws_vfs_file_seek_cur(wsi->http.fop_fd,
m - n) ==
(lws_fileofs_t)-1)
goto file_had_it;
}
}
all_sent:
if ((!wsi->trunc_len && wsi->http.filepos >= wsi->http.filelen)
#if defined(LWS_WITH_RANGES)
|| finished)
#else
)
#endif
{
lwsi_set_state(wsi, LRS_ESTABLISHED);
/* we might be in keepalive, so close it off here */
lws_vfs_file_close(&wsi->http.fop_fd);
lwsl_debug("file completed\n");
if (wsi->protocol->callback &&
user_callback_handle_rxflow(wsi->protocol->callback,
wsi, LWS_CALLBACK_HTTP_FILE_COMPLETION,
wsi->user_space, NULL,
0) < 0) {
/*
* For http/1.x, the choices from
* transaction_completed are either
* 0 to use the connection for pipelined
* or nonzero to hang it up.
*
* However for http/2. while we are
* still interested in hanging up the
* nwsi if there was a network-level
* fatal error, simply completing the
* transaction is a matter of the stream
* state, not the root connection at the
* network level
*/
if (wsi->http2_substream)
return 1;
else
return -1;
}
return 1; /* >0 indicates completed */
}
} while (0); // while (!lws_send_pipe_choked(wsi))
lws_callback_on_writable(wsi);
return 0; /* indicates further processing must be done */
file_had_it:
lws_vfs_file_close(&wsi->http.fop_fd);
return -1;
}
LWS_VISIBLE void
lws_server_get_canonical_hostname(struct lws_context *context,
const 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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