static int
callback_raw_test(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
struct per_session_data__raw_test *pss =
(struct per_session_data__raw_test *)user;
struct per_vhost_data__raw_test *vhd =
(struct per_vhost_data__raw_test *)
lws_protocol_vh_priv_get(lws_get_vhost(wsi),
lws_get_protocol(wsi));
lws_sock_file_fd_type u;
(void)pss;
switch (reason) {
case LWS_CALLBACK_PROTOCOL_INIT:
vhd = lws_protocol_vh_priv_zalloc(lws_get_vhost(wsi),
lws_get_protocol(wsi),
sizeof(struct per_vhost_data__raw_test));
vhd->context = lws_get_context(wsi);
vhd->protocol = lws_get_protocol(wsi);
vhd->vhost = lws_get_vhost(wsi);
{
const struct lws_protocol_vhost_options *pvo =
(const struct lws_protocol_vhost_options *)in;
while (pvo) {
if (!strcmp(pvo->name, "fifo-path"))
lws_strncpy(vhd->fifo_path, pvo->value,
sizeof(vhd->fifo_path));
pvo = pvo->next;
}
if (vhd->fifo_path[0] == '\0') {
lwsl_err("%s: Missing pvo \"fifo-path\", raw file fd testing disabled\n", __func__);
break;
}
}
unlink(vhd->fifo_path);
if (mkfifo(vhd->fifo_path, 0666)) {
lwsl_err("mkfifo failed\n");
return 1;
}
vhd->fifo = lws_open(vhd->fifo_path, O_NONBLOCK | O_RDONLY);
if (vhd->fifo == -1) {
lwsl_err("opening fifo failed\n");
unlink(vhd->fifo_path);
return 1;
}
lwsl_notice("FIFO %s created\n", vhd->fifo_path);
u.filefd = vhd->fifo;
if (!lws_adopt_descriptor_vhost(vhd->vhost,
LWS_ADOPT_RAW_FILE_DESC, u,
"protocol-lws-raw-test",
NULL)) {
lwsl_err("Failed to adopt fifo descriptor\n");
close(vhd->fifo);
unlink(vhd->fifo_path);
return 1;
}
break;
case LWS_CALLBACK_PROTOCOL_DESTROY:
if (!vhd)
break;
if (vhd->fifo >= 0) {
close(vhd->fifo);
unlink(vhd->fifo_path);
}
break;
/*
* Callbacks related to Raw file descriptor testing
*/
case LWS_CALLBACK_RAW_ADOPT_FILE:
lwsl_notice("LWS_CALLBACK_RAW_ADOPT_FILE\n");
break;
case LWS_CALLBACK_RAW_RX_FILE:
lwsl_notice("LWS_CALLBACK_RAW_RX_FILE\n");
{
char buf[256];
int n;
n = read(vhd->fifo, buf, sizeof(buf) - 1);
if (n < 0) {
lwsl_err("FIFO read failed\n");
return 1;
}
/*
* When nobody opened the other side of the FIFO, the FIFO fd acts well and
* only signals POLLIN when somebody opened and wrote to it.
*
* But if the other side of the FIFO closed it, we will see an endless
* POLLIN and 0 available to read.
*
* The only way to handle it is to reopen the FIFO our side and wait for a
* new peer. This is a quirk of FIFOs not of LWS.
*/
if (n == 0) { /* peer closed - do reopen in close processing */
vhd->zero_length_read = 1;
return 1;
}
buf[n] = '\0';
lwsl_info("read %d\n", n);
puts(buf);
}
break;
case LWS_CALLBACK_RAW_CLOSE_FILE:
lwsl_notice("LWS_CALLBACK_RAW_CLOSE_FILE\n");
if (vhd->zero_length_read) {
vhd->zero_length_read = 0;
close(vhd->fifo);
/* the wsi that adopted the fifo file is closing... reopen the fifo and readopt */
vhd->fifo = lws_open(vhd->fifo_path, O_NONBLOCK | O_RDONLY);
if (vhd->fifo == -1) {
lwsl_err("opening fifo failed\n");
return 1;
}
lwsl_notice("FIFO %s reopened\n", vhd->fifo_path);
u.filefd = vhd->fifo;
if (!lws_adopt_descriptor_vhost(vhd->vhost, 0, u, "protocol-lws-raw-test", NULL)) {
lwsl_err("Failed to adopt fifo descriptor\n");
close(vhd->fifo);
return 1;
}
}
break;
case LWS_CALLBACK_RAW_WRITEABLE_FILE:
lwsl_notice("LWS_CALLBACK_RAW_WRITEABLE_FILE\n");
break;
/*
* Callbacks related to Raw socket descriptor testing
*/
case LWS_CALLBACK_RAW_ADOPT:
lwsl_notice("LWS_CALLBACK_RAW_ADOPT\n");
break;
case LWS_CALLBACK_RAW_RX:
lwsl_notice("LWS_CALLBACK_RAW_RX %ld\n", (long)len);
if (len > sizeof(pss->buf))
len = sizeof(pss->buf);
memcpy(pss->buf, in, len);
pss->len = len;
lws_callback_on_writable(wsi);
break;
case LWS_CALLBACK_RAW_CLOSE:
lwsl_notice("LWS_CALLBACK_RAW_CLOSE\n");
break;
case LWS_CALLBACK_RAW_WRITEABLE:
lwsl_notice("LWS_CALLBACK_RAW_WRITEABLE\n");
lws_write(wsi, pss->buf, pss->len, LWS_WRITE_HTTP);
break;
default:
break;
}
return 0;
}
static int
callback_raw_test(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
struct raw_vhd *vhd = (struct raw_vhd *)lws_protocol_vh_priv_get(
lws_get_vhost(wsi), lws_get_protocol(wsi));
lws_sock_file_fd_type u;
uint8_t buf[1024];
int n;
switch (reason) {
case LWS_CALLBACK_PROTOCOL_INIT:
vhd = lws_protocol_vh_priv_zalloc(lws_get_vhost(wsi),
lws_get_protocol(wsi), sizeof(struct raw_vhd));
vhd->filefd = lws_open(filepath, O_RDWR);
if (vhd->filefd == -1) {
lwsl_err("Unable to open %s\n", filepath);
return 1;
}
u.filefd = (lws_filefd_type)(long long)vhd->filefd;
if (!lws_adopt_descriptor_vhost(lws_get_vhost(wsi),
LWS_ADOPT_RAW_FILE_DESC, u,
"raw-test", NULL)) {
lwsl_err("Failed to adopt fifo descriptor\n");
close(vhd->filefd);
vhd->filefd = -1;
return 1;
}
break;
case LWS_CALLBACK_PROTOCOL_DESTROY:
if (vhd && vhd->filefd != -1)
close(vhd->filefd);
break;
/* callbacks related to raw file descriptor */
case LWS_CALLBACK_RAW_ADOPT_FILE:
lwsl_notice("LWS_CALLBACK_RAW_ADOPT_FILE\n");
break;
case LWS_CALLBACK_RAW_RX_FILE:
lwsl_notice("LWS_CALLBACK_RAW_RX_FILE\n");
n = read(vhd->filefd, buf, sizeof(buf));
if (n < 0) {
lwsl_err("Reading from %s failed\n", filepath);
return 1;
}
lwsl_hexdump_level(LLL_NOTICE, buf, n);
break;
case LWS_CALLBACK_RAW_CLOSE_FILE:
lwsl_notice("LWS_CALLBACK_RAW_CLOSE_FILE\n");
break;
case LWS_CALLBACK_RAW_WRITEABLE_FILE:
lwsl_notice("LWS_CALLBACK_RAW_WRITEABLE_FILE\n");
/*
* you can call lws_callback_on_writable() on a raw file wsi as
* usual, and then write directly into the raw filefd here.
*/
break;
default:
break;
}
return 0;
}
