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nginx-mod-rtmp
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nginx-mod-rtmp/ngx_rtmp_control_module.c

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/*
* Copyright (C) Roman Arutyunyan
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include "ngx_rtmp.h"
#include "ngx_rtmp_live_module.h"
#include "ngx_rtmp_record_module.h"
static char *ngx_rtmp_control(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static void * ngx_rtmp_control_create_loc_conf(ngx_conf_t *cf);
static char * ngx_rtmp_control_merge_loc_conf(ngx_conf_t *cf,
void *parent, void *child);
typedef const char * (*ngx_rtmp_control_handler_t)(ngx_http_request_t *r,
ngx_rtmp_session_t *);
#define NGX_RTMP_CONTROL_ALL 0xff
#define NGX_RTMP_CONTROL_RECORD 0x01
#define NGX_RTMP_CONTROL_DROP 0x02
#define NGX_RTMP_CONTROL_REDIRECT 0x04
enum {
NGX_RTMP_CONTROL_FILTER_CLIENT = 0,
NGX_RTMP_CONTROL_FILTER_PUBLISHER,
NGX_RTMP_CONTROL_FILTER_SUBSCRIBER
};
typedef struct {
ngx_uint_t count;
ngx_str_t path;
ngx_uint_t filter;
ngx_str_t method;
ngx_array_t sessions; /* ngx_rtmp_session_t * */
} ngx_rtmp_control_ctx_t;
typedef struct {
ngx_uint_t control;
} ngx_rtmp_control_loc_conf_t;
static ngx_conf_bitmask_t ngx_rtmp_control_masks[] = {
{ ngx_string("all"), NGX_RTMP_CONTROL_ALL },
{ ngx_string("record"), NGX_RTMP_CONTROL_RECORD },
{ ngx_string("drop"), NGX_RTMP_CONTROL_DROP },
{ ngx_string("redirect"), NGX_RTMP_CONTROL_REDIRECT },
{ ngx_null_string, 0 }
};
static ngx_command_t ngx_rtmp_control_commands[] = {
{ ngx_string("rtmp_control"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
ngx_rtmp_control,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_rtmp_control_loc_conf_t, control),
ngx_rtmp_control_masks },
ngx_null_command
};
static ngx_http_module_t ngx_rtmp_control_module_ctx = {
NULL, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_rtmp_control_create_loc_conf, /* create location configuration */
ngx_rtmp_control_merge_loc_conf, /* merge location configuration */
};
ngx_module_t ngx_rtmp_control_module = {
NGX_MODULE_V1,
&ngx_rtmp_control_module_ctx, /* module context */
ngx_rtmp_control_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static const char *
ngx_rtmp_control_record_handler(ngx_http_request_t *r, ngx_rtmp_session_t *s)
{
ngx_int_t rc;
ngx_str_t rec;
ngx_uint_t rn;
ngx_rtmp_control_ctx_t *ctx;
ngx_rtmp_core_app_conf_t *cacf;
ngx_rtmp_record_app_conf_t *racf;
cacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_core_module);
racf = cacf->app_conf[ngx_rtmp_record_module.ctx_index];
if (ngx_http_arg(r, (u_char *) "rec", sizeof("rec") - 1, &rec) != NGX_OK) {
rec.len = 0;
}
rn = ngx_rtmp_record_find(racf, &rec);
if (rn == NGX_CONF_UNSET_UINT) {
return "Recorder not found";
}
ctx = ngx_http_get_module_ctx(r, ngx_rtmp_control_module);
if (ctx->method.len == sizeof("start") - 1 &&
ngx_strncmp(ctx->method.data, "start", ctx->method.len) == 0)
{
rc = ngx_rtmp_record_open(s, rn, &ctx->path);
} else if (ctx->method.len == sizeof("stop") - 1 &&
ngx_strncmp(ctx->method.data, "stop", ctx->method.len) == 0)
{
rc = ngx_rtmp_record_close(s, rn, &ctx->path);
} else {
return "Undefined method";
}
if (rc == NGX_ERROR) {
return "Recorder error";
}
return NGX_CONF_OK;
}
static const char *
ngx_rtmp_control_drop_handler(ngx_http_request_t *r, ngx_rtmp_session_t *s)
{
ngx_rtmp_control_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_rtmp_control_module);
ngx_rtmp_finalize_session(s);
++ctx->count;
return NGX_CONF_OK;
}
static const char *
ngx_rtmp_control_redirect_handler(ngx_http_request_t *r, ngx_rtmp_session_t *s)
{
ngx_str_t name;
ngx_rtmp_play_t vplay;
ngx_rtmp_publish_t vpublish;
ngx_rtmp_live_ctx_t *lctx;
ngx_rtmp_control_ctx_t *ctx;
ngx_rtmp_close_stream_t vc;
if (ngx_http_arg(r, (u_char *) "newname", sizeof("newname") - 1, &name)
!= NGX_OK)
{
return "newname not specified";
}
if (name.len >= NGX_RTMP_MAX_NAME) {
name.len = NGX_RTMP_MAX_NAME - 1;
}
ctx = ngx_http_get_module_ctx(r, ngx_rtmp_control_module);
ctx->count++;
ngx_memzero(&vc, sizeof(ngx_rtmp_close_stream_t));
/* close_stream should be synchronous */
ngx_rtmp_close_stream(s, &vc);
lctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (lctx && lctx->publishing) {
/* publish */
ngx_memzero(&vpublish, sizeof(ngx_rtmp_publish_t));
ngx_memcpy(vpublish.name, name.data, name.len);
ngx_rtmp_cmd_fill_args(vpublish.name, vpublish.args);
if (ngx_rtmp_publish(s, &vpublish) != NGX_OK) {
return "publish failed";
}
} else {
/* play */
ngx_memzero(&vplay, sizeof(ngx_rtmp_play_t));
ngx_memcpy(vplay.name, name.data, name.len);
ngx_rtmp_cmd_fill_args(vplay.name, vplay.args);
if (ngx_rtmp_play(s, &vplay) != NGX_OK) {
return "play failed";
}
}
return NGX_CONF_OK;
}
static const char *
ngx_rtmp_control_walk_session(ngx_http_request_t *r,
ngx_rtmp_live_ctx_t *lctx)
{
ngx_str_t addr, *paddr, clientid;
ngx_rtmp_session_t *s, **ss;
ngx_rtmp_control_ctx_t *ctx;
s = lctx->session;
if (s == NULL || s->connection == NULL) {
return NGX_CONF_OK;
}
if (ngx_http_arg(r, (u_char *) "addr", sizeof("addr") - 1, &addr)
== NGX_OK)
{
paddr = &s->connection->addr_text;
if (paddr->len != addr.len ||
ngx_strncmp(paddr->data, addr.data, addr.len))
{
return NGX_CONF_OK;
}
}
if (ngx_http_arg(r, (u_char *) "clientid", sizeof("clientid") - 1,
&clientid)
== NGX_OK)
{
if (s->connection->number !=
(ngx_uint_t) ngx_atoi(clientid.data, clientid.len))
{
return NGX_CONF_OK;
}
}
ctx = ngx_http_get_module_ctx(r, ngx_rtmp_control_module);
switch (ctx->filter) {
case NGX_RTMP_CONTROL_FILTER_PUBLISHER:
if (!lctx->publishing) {
return NGX_CONF_OK;
}
break;
case NGX_RTMP_CONTROL_FILTER_SUBSCRIBER:
if (lctx->publishing) {
return NGX_CONF_OK;
}
break;
case NGX_RTMP_CONTROL_FILTER_CLIENT:
break;
}
ss = ngx_array_push(&ctx->sessions);
if (ss == NULL) {
return "allocation error";
}
*ss = s;
return NGX_CONF_OK;
}
static const char *
ngx_rtmp_control_walk_stream(ngx_http_request_t *r,
ngx_rtmp_live_stream_t *ls)
{
const char *s;
ngx_rtmp_live_ctx_t *lctx;
for (lctx = ls->ctx; lctx; lctx = lctx->next) {
s = ngx_rtmp_control_walk_session(r, lctx);
if (s != NGX_CONF_OK) {
return s;
}
}
return NGX_CONF_OK;
}
static const char *
ngx_rtmp_control_walk_app(ngx_http_request_t *r,
ngx_rtmp_core_app_conf_t *cacf)
{
size_t len;
ngx_str_t name;
const char *s;
ngx_uint_t n;
ngx_rtmp_live_stream_t *ls;
ngx_rtmp_live_app_conf_t *lacf;
lacf = cacf->app_conf[ngx_rtmp_live_module.ctx_index];
if (ngx_http_arg(r, (u_char *) "name", sizeof("name") - 1, &name) != NGX_OK)
{
for (n = 0; n < (ngx_uint_t) lacf->nbuckets; ++n) {
for (ls = lacf->streams[n]; ls; ls = ls->next) {
s = ngx_rtmp_control_walk_stream(r, ls);
if (s != NGX_CONF_OK) {
return s;
}
}
}
return NGX_CONF_OK;
}
for (ls = lacf->streams[ngx_hash_key(name.data, name.len) % lacf->nbuckets];
ls; ls = ls->next)
{
len = ngx_strlen(ls->name);
if (name.len != len || ngx_strncmp(name.data, ls->name, name.len)) {
continue;
}
s = ngx_rtmp_control_walk_stream(r, ls);
if (s != NGX_CONF_OK) {
return s;
}
}
return NGX_CONF_OK;
}
static const char *
ngx_rtmp_control_walk_server(ngx_http_request_t *r,
ngx_rtmp_core_srv_conf_t *cscf)
{
ngx_str_t app;
ngx_uint_t n;
const char *s;
ngx_rtmp_core_app_conf_t **pcacf;
if (ngx_http_arg(r, (u_char *) "app", sizeof("app") - 1, &app) != NGX_OK) {
app.len = 0;
}
pcacf = cscf->applications.elts;
for (n = 0; n < cscf->applications.nelts; ++n, ++pcacf) {
if (app.len && ((*pcacf)->name.len != app.len ||
ngx_strncmp((*pcacf)->name.data, app.data, app.len)))
{
continue;
}
s = ngx_rtmp_control_walk_app(r, *pcacf);
if (s != NGX_CONF_OK) {
return s;
}
}
return NGX_CONF_OK;
}
static const char *
ngx_rtmp_control_walk(ngx_http_request_t *r, ngx_rtmp_control_handler_t h)
{
ngx_rtmp_core_main_conf_t *cmcf = ngx_rtmp_core_main_conf;
ngx_str_t srv;
ngx_uint_t sn, n;
const char *msg;
ngx_rtmp_session_t **s;
ngx_rtmp_control_ctx_t *ctx;
ngx_rtmp_core_srv_conf_t **pcscf;
sn = 0;
if (ngx_http_arg(r, (u_char *) "srv", sizeof("srv") - 1, &srv) == NGX_OK) {
sn = ngx_atoi(srv.data, srv.len);
}
if (sn >= cmcf->servers.nelts) {
return "Server index out of range";
}
pcscf = cmcf->servers.elts;
pcscf += sn;
msg = ngx_rtmp_control_walk_server(r, *pcscf);
if (msg != NGX_CONF_OK) {
return msg;
}
ctx = ngx_http_get_module_ctx(r, ngx_rtmp_control_module);
s = ctx->sessions.elts;
for (n = 0; n < ctx->sessions.nelts; n++) {
msg = h(r, s[n]);
if (msg != NGX_CONF_OK) {
return msg;
}
}
return NGX_CONF_OK;
}
static ngx_int_t
ngx_rtmp_control_record(ngx_http_request_t *r, ngx_str_t *method)
{
ngx_buf_t *b;
const char *msg;
ngx_chain_t cl;
ngx_rtmp_control_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_rtmp_control_module);
ctx->filter = NGX_RTMP_CONTROL_FILTER_PUBLISHER;
msg = ngx_rtmp_control_walk(r, ngx_rtmp_control_record_handler);
if (msg != NGX_CONF_OK) {
goto error;
}
if (ctx->path.len == 0) {
return NGX_HTTP_NO_CONTENT;
}
/* output record path */
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = ctx->path.len;
b = ngx_create_temp_buf(r->pool, ctx->path.len);
if (b == NULL) {
goto error;
}
ngx_memzero(&cl, sizeof(cl));
cl.buf = b;
b->last = ngx_cpymem(b->pos, ctx->path.data, ctx->path.len);
b->last_buf = 1;
ngx_http_send_header(r);
return ngx_http_output_filter(r, &cl);
error:
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
static ngx_int_t
ngx_rtmp_control_drop(ngx_http_request_t *r, ngx_str_t *method)
{
size_t len;
u_char *p;
ngx_buf_t *b;
ngx_chain_t cl;
const char *msg;
ngx_rtmp_control_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_rtmp_control_module);
if (ctx->method.len == sizeof("publisher") - 1 &&
ngx_memcmp(ctx->method.data, "publisher", ctx->method.len) == 0)
{
ctx->filter = NGX_RTMP_CONTROL_FILTER_PUBLISHER;
} else if (ctx->method.len == sizeof("subscriber") - 1 &&
ngx_memcmp(ctx->method.data, "subscriber", ctx->method.len)
== 0)
{
ctx->filter = NGX_RTMP_CONTROL_FILTER_SUBSCRIBER;
} else if (method->len == sizeof("client") - 1 &&
ngx_memcmp(ctx->method.data, "client", ctx->method.len) == 0)
{
ctx->filter = NGX_RTMP_CONTROL_FILTER_CLIENT;
} else {
msg = "Undefined filter";
goto error;
}
msg = ngx_rtmp_control_walk(r, ngx_rtmp_control_drop_handler);
if (msg != NGX_CONF_OK) {
goto error;
}
/* output count */
len = NGX_INT_T_LEN;
p = ngx_palloc(r->connection->pool, len);
if (p == NULL) {
return NGX_ERROR;
}
len = (size_t) (ngx_snprintf(p, len, "%ui", ctx->count) - p);
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = len;
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
goto error;
}
b->start = b->pos = p;
b->end = b->last = p + len;
b->temporary = 1;
b->last_buf = 1;
ngx_memzero(&cl, sizeof(cl));
cl.buf = b;
ngx_http_send_header(r);
return ngx_http_output_filter(r, &cl);
error:
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
static ngx_int_t
ngx_rtmp_control_redirect(ngx_http_request_t *r, ngx_str_t *method)
{
size_t len;
u_char *p;
ngx_buf_t *b;
ngx_chain_t cl;
const char *msg;
ngx_rtmp_control_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_rtmp_control_module);
if (ctx->method.len == sizeof("publisher") - 1 &&
ngx_memcmp(ctx->method.data, "publisher", ctx->method.len) == 0)
{
ctx->filter = NGX_RTMP_CONTROL_FILTER_PUBLISHER;
} else if (ctx->method.len == sizeof("subscriber") - 1 &&
ngx_memcmp(ctx->method.data, "subscriber", ctx->method.len)
== 0)
{
ctx->filter = NGX_RTMP_CONTROL_FILTER_SUBSCRIBER;
} else if (ctx->method.len == sizeof("client") - 1 &&
ngx_memcmp(ctx->method.data, "client", ctx->method.len) == 0)
{
ctx->filter = NGX_RTMP_CONTROL_FILTER_CLIENT;
} else {
msg = "Undefined filter";
goto error;
}
msg = ngx_rtmp_control_walk(r, ngx_rtmp_control_redirect_handler);
if (msg != NGX_CONF_OK) {
goto error;
}
/* output count */
len = NGX_INT_T_LEN;
p = ngx_palloc(r->connection->pool, len);
if (p == NULL) {
goto error;
}
len = (size_t) (ngx_snprintf(p, len, "%ui", ctx->count) - p);
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = len;
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
goto error;
}
b->start = b->pos = p;
b->end = b->last = p + len;
b->temporary = 1;
b->last_buf = 1;
ngx_memzero(&cl, sizeof(cl));
cl.buf = b;
ngx_http_send_header(r);
return ngx_http_output_filter(r, &cl);
error:
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
static ngx_int_t
ngx_rtmp_control_handler(ngx_http_request_t *r)
{
u_char *p;
ngx_str_t section, method;
ngx_uint_t n;
ngx_rtmp_control_ctx_t *ctx;
ngx_rtmp_control_loc_conf_t *llcf;
llcf = ngx_http_get_module_loc_conf(r, ngx_rtmp_control_module);
if (llcf->control == 0) {
return NGX_DECLINED;
}
/* uri format: .../section/method?args */
ngx_str_null(&section);
ngx_str_null(&method);
for (n = r->uri.len; n; --n) {
p = &r->uri.data[n - 1];
if (*p != '/') {
continue;
}
if (method.data) {
section.data = p + 1;
section.len = method.data - section.data - 1;
break;
}
method.data = p + 1;
method.len = r->uri.data + r->uri.len - method.data;
}
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, r->connection->log, 0,
"rtmp_control: section='%V' method='%V'",
&section, &method);
ctx = ngx_pcalloc(r->pool, sizeof(ngx_rtmp_control_ctx_t));
if (ctx == NULL) {
return NGX_ERROR;
}
ngx_http_set_ctx(r, ctx, ngx_rtmp_control_module);
if (ngx_array_init(&ctx->sessions, r->pool, 1, sizeof(void *)) != NGX_OK) {
return NGX_ERROR;
}
ctx->method = method;
#define NGX_RTMP_CONTROL_SECTION(flag, secname) \
if (llcf->control & NGX_RTMP_CONTROL_##flag && \
section.len == sizeof(#secname) - 1 && \
ngx_strncmp(section.data, #secname, sizeof(#secname) - 1) == 0) \
{ \
return ngx_rtmp_control_##secname(r, &method); \
}
NGX_RTMP_CONTROL_SECTION(RECORD, record);
NGX_RTMP_CONTROL_SECTION(DROP, drop);
NGX_RTMP_CONTROL_SECTION(REDIRECT, redirect);
#undef NGX_RTMP_CONTROL_SECTION
return NGX_DECLINED;
}
static void *
ngx_rtmp_control_create_loc_conf(ngx_conf_t *cf)
{
ngx_rtmp_control_loc_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_rtmp_control_loc_conf_t));
if (conf == NULL) {
return NULL;
}
conf->control = 0;
return conf;
}
static char *
ngx_rtmp_control_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_rtmp_control_loc_conf_t *prev = parent;
ngx_rtmp_control_loc_conf_t *conf = child;
ngx_conf_merge_bitmask_value(conf->control, prev->control, 0);
return NGX_CONF_OK;
}
static char *
ngx_rtmp_control(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_core_loc_conf_t *clcf;
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
clcf->handler = ngx_rtmp_control_handler;
return ngx_conf_set_bitmask_slot(cf, cmd, conf);
}
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