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ngx_rtmp_sharedobject_module.c
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#include "ngx_rtmp_sharedobject_module.h"
#include "ngx_rtmp_cmd_module.h"
#include "ngx_rtmp_streams.h"
static ngx_int_t ngx_rtmp_sharedobject_postconfiguration(ngx_conf_t *cf);
static void * ngx_rtmp_sharedobject_create_app_conf(ngx_conf_t *cf);
static char * ngx_rtmp_sharedobject_merge_app_conf(ngx_conf_t *cf,
void *parent, void *child);
static ngx_rtmp_module_t ngx_rtmp_sharedobject_module_ctx = {
NULL, /* preconfiguration */
ngx_rtmp_sharedobject_postconfiguration, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_rtmp_sharedobject_create_app_conf, /* create app configuration */
ngx_rtmp_sharedobject_merge_app_conf /* merge app configuration */
};
ngx_module_t ngx_rtmp_sharedobject_module = {
NGX_MODULE_V1,
&ngx_rtmp_sharedobject_module_ctx, /* module context */
NULL, /* module directives */
NGX_RTMP_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
};
// FIXME: use free_sharedobject like free_streams in live_module
static void *
ngx_rtmp_sharedobject_create_app_conf(ngx_conf_t *cf)
{
ngx_rtmp_sharedobject_app_conf_t *soacf;
soacf = ngx_pcalloc(cf->pool, sizeof(ngx_rtmp_sharedobject_app_conf_t));
if (soacf == NULL) {
return NULL;
}
soacf->nbuckets = NGX_CONF_UNSET;
return soacf;
}
static char *
ngx_rtmp_sharedobject_merge_app_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_rtmp_sharedobject_app_conf_t *prev = parent;
ngx_rtmp_sharedobject_app_conf_t *conf = child;
ngx_conf_merge_value(conf->nbuckets, prev->nbuckets, 1024);
conf->pool = ngx_create_pool(4096, &cf->cycle->new_log);
if (conf->pool == NULL) {
return NGX_CONF_ERROR;
}
conf->shared_objects =
ngx_pcalloc(cf->pool, sizeof(ngx_rtmp_sharedobject_t *) * conf->nbuckets);
return NGX_CONF_OK;
}
/*************************************************************************/
static ngx_rtmp_sharedobject_t **
ngx_rtmp_sharedobject_search(ngx_rtmp_session_t *s, u_char *name,
uint32_t flags, int create)
{
ngx_rtmp_sharedobject_app_conf_t *soacf;
ngx_rtmp_sharedobject_t **so;
size_t len;
soacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_sharedobject_module);
if (soacf == NULL) {
return NULL;
}
len = ngx_strlen(name);
so = &(soacf->shared_objects[ngx_hash_key(name, len) % soacf->nbuckets]);
for (; *so; so = &(*so)->next) {
if (ngx_strcmp(name, (*so)->name) == 0) {
return so;
}
}
if (!create) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: '%s' not found", name);
return NULL;
}
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: create '%s'", name);
if (soacf->free_shared_objects) {
*so = soacf->free_shared_objects;
soacf->free_shared_objects = soacf->free_shared_objects->next;
}
else {
*so = ngx_palloc(soacf->pool, sizeof(ngx_rtmp_sharedobject_t));
}
ngx_memzero(*so, sizeof(ngx_rtmp_sharedobject_t));
ngx_memcpy((*so)->name, name, ngx_min(sizeof((*so)->name) - 1, len));
(*so)->version = 0;
(*so)->persistent = (flags != 0);
return so;
}
static ngx_rtmp_sharedobject_t **
ngx_rtmp_sharedobject_get(ngx_rtmp_session_t *s, u_char *name)
{
ngx_rtmp_sharedobject_ctx_t *ctx;
ngx_rtmp_sharedobject_list_t *solist;
ngx_rtmp_sharedobject_t **so;
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_sharedobject_module);
if (ctx == NULL) {
return NULL;
}
for (solist = ctx->shared_objects; solist; solist = solist->next) {
so = &(solist->shared_object);
if (ngx_strcmp(name, (*so)->name) == 0) {
return so;
}
}
return NULL;
}
static ngx_rtmp_sharedobject_t **
ngx_rtmp_sharedobject_use(ngx_rtmp_session_t *s, u_char *name,
uint32_t flags)
{
ngx_rtmp_sharedobject_ctx_t *ctx;
ngx_rtmp_sharedobject_list_t *solist;
ngx_rtmp_sharedobject_t **so;
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_sharedobject_module);
if (ctx == NULL) {
ctx = ngx_pcalloc(s->connection->pool,
sizeof(ngx_rtmp_sharedobject_ctx_t));
ctx->session = s;
ngx_rtmp_set_ctx(s, ctx, ngx_rtmp_sharedobject_module);
}
so = ngx_rtmp_sharedobject_get(s, name);
if (so != NULL) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: '%s' already in use", name);
return so;
}
so = ngx_rtmp_sharedobject_search(s, name, flags, 1);
if (so == NULL) {
return NULL;
}
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: use '%s'", name);
ctx->next = (*so)->ctx;
(*so)->ctx = ctx;
solist = ngx_pcalloc(s->connection->pool,
sizeof(ngx_rtmp_sharedobject_list_t));
solist->shared_object = *so;
solist->next = ctx->shared_objects;
ctx->shared_objects = solist;
return so;
}
static ngx_int_t
ngx_rtmp_sharedobject_use_success(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so)
{
ngx_rtmp_sharedobject_prop_t *prop;
ngx_rtmp_header_t h;
static uint32_t zero = 0;
static uint32_t success = NGX_RTMP_SHARED_USE_SUCCESS;
static ngx_rtmp_amf_elt_t out_elts[] = {
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&zero, 0 },
{ NGX_RTMP_AMF_INT8 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&success, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&zero, 0 },
};
out_elts[0].data = so->name;
out_elts[1].data = &(so->version);
out_elts[2].data = (uint32_t[]){(so->persistent) ? 34 : 0};
ngx_memzero(&h, sizeof(h));
h.type = NGX_RTMP_MSG_AMF_SHARED;
h.csid = NGX_RTMP_CSID_SHARED;
h.msid = 0;
return (ngx_rtmp_send_amf(s, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0])) != NGX_OK)
? NGX_ERROR
: NGX_OK;
}
/*************************************************************************/
static ngx_int_t
ngx_rtmp_sharedobject_release(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so)
{
ngx_rtmp_sharedobject_ctx_t *ctx, **cctx;
ngx_rtmp_sharedobject_app_conf_t *soacf;
ngx_rtmp_sharedobject_list_t *solist, *prev;
ngx_rtmp_sharedobject_prop_t *prop;
ngx_rtmp_sharedobject_t **freeso;
soacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_sharedobject_module);
if (soacf == NULL) {
return NGX_ERROR;
}
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_sharedobject_module);
if (ctx == NULL) {
return NGX_ERROR;
}
for (prev=NULL, solist = ctx->shared_objects;
solist;
prev = solist, solist = solist->next) {
if (so == solist->shared_object) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: release '%s'", so->name);
if (prev == NULL) {
ctx->shared_objects = solist->next;
}
else {
prev->next = solist->next;
}
ngx_pfree(s->connection->pool, solist);
for (cctx = &(so->ctx); *cctx; cctx = &((*cctx)->next)) {
if (*cctx == ctx) {
*cctx = ctx->next;
break;
}
}
if (so->ctx) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: do not remove '%s' (still in use)",
so->name);
}
else if (so->persistent) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: do not remove '%s' (persistent)",
so->name);
}
else {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: remove '%s'", so->name);
while (so->prop) {
prop = so->prop;
so->prop = prop->next;
ngx_pfree(soacf->pool, prop->name);
ngx_pfree(soacf->pool, prop->value);
ngx_pfree(soacf->pool, prop);
}
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: free '%s'", so->name);
freeso = ngx_rtmp_sharedobject_search(s, so->name, 0, 0);
if (freeso != NULL) {
*freeso = (*freeso)->next;
}
so->next = soacf->free_shared_objects;
soacf->free_shared_objects = so;
}
break;
}
}
return NGX_OK;
}
/*************************************************************************/
static ngx_int_t
ngx_rtmp_sharedobject_sendmsg(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so,
u_char *data, uint32_t len)
{
ngx_rtmp_sharedobject_ctx_t *ctx;
ngx_rtmp_header_t h;
static uint32_t zero = 0;
static uint32_t send = NGX_RTMP_SHARED_SEND_MESSAGE;
static ngx_rtmp_amf_elt_t out_elts[] = {
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&zero, 0 },
{ NGX_RTMP_AMF_INT8 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&send, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0},
{ NGX_RTMP_AMF_RAWDATA | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0},
};
out_elts[0].data = so->name;
out_elts[1].data = &(so->version);
out_elts[2].data = (uint32_t[]){(so->persistent) ? 34 : 0};
out_elts[5].data = &len;
out_elts[6].data = data;
out_elts[6].len = len;
ngx_memzero(&h, sizeof(h));
h.type = NGX_RTMP_MSG_AMF_SHARED;
h.csid = NGX_RTMP_CSID_SHARED;
for (ctx = so->ctx; ctx; ctx = ctx->next) {
if (ctx->session != s) {
ngx_rtmp_send_amf(ctx->session, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0]));
}
}
return (ngx_rtmp_send_amf(s, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0])) != NGX_OK)
? NGX_ERROR
: NGX_OK;
}
static ngx_int_t
ngx_rtmp_sharedobject_status(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so,
u_char *code, u_char *level)
{
ngx_rtmp_header_t h;
static uint32_t zero = 0;
static uint32_t status = NGX_RTMP_SHARED_STATUS;
static ngx_rtmp_amf_elt_t out_elts[] = {
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&zero, 0 },
{ NGX_RTMP_AMF_INT8 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&status, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
};
out_elts[0].data = so->name;
out_elts[1].data = &(so->version);
out_elts[2].data = (uint32_t[]){(so->persistent) ? 34 : 0};
out_elts[5].data = (uint32_t[]){4 + ngx_strlen(code) + ngx_strlen(level)};
out_elts[6].data = code;
out_elts[7].data = level;
ngx_memzero(&h, sizeof(h));
h.type = NGX_RTMP_MSG_AMF_SHARED;
h.csid = NGX_RTMP_CSID_SHARED;
h.msid = 0;
return (ngx_rtmp_send_amf(s, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0])) != NGX_OK)
? NGX_ERROR
: NGX_OK;
}
/*************************************************************************/
static ngx_rtmp_sharedobject_prop_t *
ngx_rtmp_sharedobject_search_prop(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so,
u_char *name)
{
ngx_rtmp_sharedobject_prop_t *prop;
for (prop = so->prop; prop; prop = prop->next) {
if (ngx_strcmp(name, prop->name) == 0) {
return prop;
}
}
return NULL;
}
static ngx_rtmp_sharedobject_prop_t *
ngx_rtmp_sharedobject_request_change(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so,
u_char *data, uint32_t len)
{
ngx_rtmp_sharedobject_app_conf_t *soacf;
ngx_rtmp_sharedobject_prop_t *prop;
u_char *name, *value, *p;
uint16_t sz;
soacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_sharedobject_module);
if (soacf == NULL) {
return NULL;
}
/* read property name */
p = (u_char*)&sz;
p[0] = data[1];
p[1] = data[0];
name = ngx_pcalloc(soacf->pool, sizeof(u_char) * sz);
ngx_memcpy(name, data+2, sz);
/* read property value */
value = ngx_pcalloc(soacf->pool, sizeof(u_char) * (len-sz));
ngx_memcpy(value, data+2+sz, (len-sz));
/* Store the property */
prop = ngx_rtmp_sharedobject_search_prop(s, so, name);
if (prop == NULL) {
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: set property '%s' in '%s'",
name, so->name);
prop = ngx_pcalloc(soacf->pool, sizeof(ngx_rtmp_sharedobject_prop_t));
prop->name = name;
prop->name_len = sz;
prop->value = value;
prop->value_len = len-sz;
prop->next = so->prop;
so->prop = prop;
}
else {
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: update property '%s' in '%s'",
name, so->name);
ngx_pfree(soacf->pool, name);
ngx_pfree(soacf->pool, prop->value);
prop->value = value;
prop->value_len = len-sz;
}
return prop;
}
static ngx_int_t
ngx_rtmp_sharedobject_success(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so,
u_char *name, ngx_int_t len)
{
ngx_rtmp_header_t h;
static uint32_t zero = 0;
static uint32_t success = NGX_RTMP_SHARED_SUCCESS;
static ngx_rtmp_amf_elt_t out_elts[] = {
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&zero, 0 },
{ NGX_RTMP_AMF_INT8 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&success, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0},
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0}
};
out_elts[0].data = so->name;
out_elts[1].data = &(so->version);
out_elts[2].data = (uint32_t[]){(so->persistent) ? 34 : 0};
out_elts[5].data = (uint32_t[]){2+len};
out_elts[6].data = name;
ngx_memzero(&h, sizeof(h));
h.type = NGX_RTMP_MSG_AMF_SHARED;
h.csid = NGX_RTMP_CSID_SHARED;
return (ngx_rtmp_send_amf(s, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0])) != NGX_OK)
? NGX_ERROR
: NGX_OK;
}
static ngx_int_t
ngx_rtmp_sharedobject_change(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so,
ngx_rtmp_sharedobject_prop_t *prop)
{
ngx_rtmp_header_t h;
static uint32_t zero = 0;
static uint32_t change = NGX_RTMP_SHARED_CHANGE;
static ngx_rtmp_amf_elt_t out_elts[] = {
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&zero, 0 },
{ NGX_RTMP_AMF_INT8 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&change, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0},
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0},
{ NGX_RTMP_AMF_RAWDATA | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0},
};
out_elts[0].data = so->name;
out_elts[1].data = &(so->version);
out_elts[2].data = (uint32_t[]){(so->persistent) ? 34 : 0};
out_elts[5].data = (uint32_t[]){2+prop->name_len+prop->value_len};
out_elts[6].data = prop->name;
out_elts[6].len = prop->name_len;
out_elts[7].data = prop->value;
out_elts[7].len = prop->value_len;
ngx_memzero(&h, sizeof(h));
h.type = NGX_RTMP_MSG_AMF_SHARED;
h.csid = NGX_RTMP_CSID_SHARED;
return (ngx_rtmp_send_amf(s, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0])) != NGX_OK)
? NGX_ERROR
: NGX_OK;
}
/*************************************************************************/
static ngx_int_t
ngx_rtmp_sharedobject_request_remove(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so,
u_char *name, uint32_t len)
{
ngx_rtmp_sharedobject_app_conf_t *soacf;
ngx_rtmp_sharedobject_prop_t *prop, *prev;
u_char *p;
soacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_sharedobject_module);
if (soacf == NULL) {
return NGX_ERROR;
}
for (prev = NULL, prop = so->prop;
prop;
prev = prop, prop = prop->next) {
if (ngx_strncmp(prop->name, name, len) == 0)
break;
}
if (prop != NULL) {
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: remove property '%s' in '%s'",
prop->name, so->name);
if (prev == NULL) {
so->prop = prop->next;
}
else {
prev->next = prop->next;
}
ngx_pfree(soacf->pool, prop->name);
ngx_pfree(soacf->pool, prop->value);
ngx_pfree(soacf->pool, prop);
}
return NGX_OK;
}
static ngx_int_t
ngx_rtmp_sharedobject_remove(ngx_rtmp_session_t *s,
ngx_rtmp_sharedobject_t *so,
u_char *name, uint32_t len)
{
ngx_rtmp_header_t h;
static uint32_t zero = 0;
static uint32_t remove = NGX_RTMP_SHARED_REMOVE;
static ngx_rtmp_amf_elt_t out_elts[] = {
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&zero, 0 },
{ NGX_RTMP_AMF_INT8 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&remove, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0},
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0}
};
out_elts[0].data = so->name;
out_elts[1].data = &(so->version);
out_elts[2].data = (uint32_t[]){(so->persistent) ? 34 : 0};
out_elts[5].data = (uint32_t[]){2+len};
out_elts[6].data = name;
out_elts[6].len = len;
ngx_memzero(&h, sizeof(h));
h.type = NGX_RTMP_MSG_AMF_SHARED;
h.csid = NGX_RTMP_CSID_SHARED;
return (ngx_rtmp_send_amf(s, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0])) != NGX_OK)
? NGX_ERROR
: NGX_OK;
}
/*************************************************************************/
static ngx_int_t
ngx_rtmp_sharedobject_clear(ngx_rtmp_session_t *s, ngx_rtmp_sharedobject_t *so)
{
ngx_rtmp_sharedobject_prop_t *prop;
ngx_rtmp_header_t h;
static uint32_t zero = 0;
static uint32_t clear = NGX_RTMP_SHARED_CLEAR;
static ngx_rtmp_amf_elt_t out_elts[] = {
{ NGX_RTMP_AMF_STRING | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
NULL, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&zero, 0 },
{ NGX_RTMP_AMF_INT8 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&clear, 0 },
{ NGX_RTMP_AMF_INT32 | NGX_RTMP_AMF_TYPELESS,
ngx_null_string,
&zero, 0 },
};
out_elts[0].data = so->name;
out_elts[1].data = &(so->version);
out_elts[2].data = (uint32_t[]){(so->persistent) ? 34 : 0};
ngx_memzero(&h, sizeof(h));
h.type = NGX_RTMP_MSG_AMF_SHARED;
h.csid = NGX_RTMP_CSID_SHARED;
h.msid = 0;
return (ngx_rtmp_send_amf(s, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0])) != NGX_OK)
? NGX_ERROR
: NGX_OK;
}
/*************************************************************************/
static char *
ngx_rtmp_sharedobject_message_type(u_char evt)
{
static char* evts[] = {
"?",
"use",
"release",
"request_change",
"change",
"success",
"send_message",
"status",
"clear",
"remove",
"request_remove",
"use_success"
};
return evt < sizeof(evts) / sizeof(evts[0])
? evts[evt]
: "?";
}
static ngx_int_t
ngx_rtmp_sharedobject_event(ngx_rtmp_session_t *s, u_char *name,
uint32_t flags, ngx_chain_t *in)
{
ngx_rtmp_sharedobject_ctx_t *ctx;
ngx_rtmp_sharedobject_t **so;
ngx_rtmp_sharedobject_prop_t *prop;
ngx_buf_t *b;
u_char *p;
u_char evt;
uint32_t len;
ngx_int_t rc = NGX_OK;
b = in->buf;
if (b->last - b->pos < 5) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: too small buffer for event: %d",
b->last - b->pos);
return NGX_ERROR;
}
/* read event type */
evt = b->pos[0];
/* read event data length */
p = (u_char*)&len;
p[0] = b->pos[4];
p[1] = b->pos[3];
p[2] = b->pos[2];
p[3] = b->pos[1];
ngx_log_debug3(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"shared-object: recv evt %s (%d) length=%uD",
ngx_rtmp_sharedobject_message_type(evt), (int)evt, len);
switch (evt) {
case NGX_RTMP_SHARED_USE:
/* Skip data */
b->pos += len + 5;
so = ngx_rtmp_sharedobject_use(s, name, flags);
/* Prepare the response */
if (so == NULL) {
rc = NGX_ERROR;
}
else {
rc = ngx_rtmp_sharedobject_use_success(s, *so);
if ((*so)->prop) {
for (prop = (*so)->prop; rc == NGX_OK && prop; prop = prop->next) {
rc = ngx_rtmp_sharedobject_change(s, *so, prop);
}
}
else {
rc = ngx_rtmp_sharedobject_clear(s, *so);
}
ngx_rtmp_sharedobject_status(s, *so, "SharedObject.Connect.Success",
"status");
for (ctx = (*so)->ctx; ctx; ctx = ctx->next) {
if (ctx->session != s) {
ngx_rtmp_sharedobject_status(ctx->session, *so,
"SharedObject.Peer.Connect",
"status");
}
}
}
break;
case NGX_RTMP_SHARED_RELEASE:
/* Skip event data */
b->pos += len + 5;
so = ngx_rtmp_sharedobject_get(s, name);
if (so == NULL) {
rc = NGX_ERROR;
}
else {
ngx_rtmp_sharedobject_status(s, *so, "SharedObject.Connect.Closed",
"status");
for (ctx = (*so)->ctx; ctx; ctx = ctx->next) {
if (ctx->session != s) {
ngx_rtmp_sharedobject_status(ctx->session, *so,
"SharedObject.Peer.Disconnect",
"status");
}
}
rc = ngx_rtmp_sharedobject_release(s, *so);
}
break;
case NGX_RTMP_SHARED_REQUEST_CHANGE:
{
u_char data[len];
/* Read data */
ngx_memcpy(data, b->pos + 5, len);
b->pos += len + 5;
so = ngx_rtmp_sharedobject_get(s, name);
if (so == NULL) {
rc = NGX_ERROR;
}
else {
prop = ngx_rtmp_sharedobject_request_change(s, *so, data, len);
if (prop == NULL) {
rc = NGX_ERROR;
}
else {
rc = ngx_rtmp_sharedobject_success(s, *so, prop->name,
prop->name_len);
(*so)->version += 1;
for (ctx = (*so)->ctx; rc == NGX_OK && ctx; ctx = ctx->next) {
if (ctx->session != s) {
rc = ngx_rtmp_sharedobject_change(ctx->session, *so, prop);
}
}
}
}
}
break;
case NGX_RTMP_SHARED_SEND_MESSAGE:
{
u_char data[len];
/* Read data */
ngx_memcpy(data, b->pos + 5, len);
b->pos += len + 5;
so = ngx_rtmp_sharedobject_get(s, name);
if (so != NULL) {
rc = ngx_rtmp_sharedobject_sendmsg(s, *so, data, len);
}
}
break;
case NGX_RTMP_SHARED_REQUEST_REMOVE:
{
u_char data[len];
/* Read data */
ngx_memcpy(data, b->pos + 5, len);
b->pos += len + 5;
so = ngx_rtmp_sharedobject_get(s, name);
if (so != NULL) {
rc = ngx_rtmp_sharedobject_request_remove(s, *so, data+2, len-2);
if (rc != NGX_ERROR) {
rc = ngx_rtmp_sharedobject_success(s, *so, data+2, len-2);
(*so)->version += 1;
for (ctx = (*so)->ctx; rc == NGX_OK && ctx; ctx = ctx->next) {
if (ctx->session != s) {
rc = ngx_rtmp_sharedobject_remove(ctx->session, *so,
data+2, len-2);
}
}
}
}
}
break;
default:
/* Ignore event and skip data */
b->pos += len + 5;
break;
}
return rc;
}
static ngx_int_t
ngx_rtmp_sharedobject_message_handler(ngx_rtmp_session_t *s,
ngx_rtmp_header_t *h,
ngx_chain_t *in)
{