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srs/trunk/src/protocol/srs_protocol_utility.cpp
Winlin 3e8cb3f9d5
AI: Replace SrsSharedPtrMessage with SrsMediaPacket for unified media packet handling. v7.0.74 (#4465) 
This PR introduces a major refactoring to replace `SrsSharedPtrMessage`
with `SrsMediaPacket` throughout the SRS codebase, providing a more
unified and cleaner approach to media packet handling.

---------

Co-authored-by: OSSRS-AI <winlinam@gmail.com>
2025-09-01 18:06:24 -04:00

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//
// Copyright (c) 2013-2025 The SRS Authors
//
// SPDX-License-Identifier: MIT
//
#include <srs_protocol_utility.hpp>
#include <unistd.h>
#include <arpa/inet.h>
#include <sstream>
#include <stdlib.h>
using namespace std;
#include <srs_kernel_buffer.hpp>
#include <srs_kernel_codec.hpp>
#include <srs_kernel_consts.hpp>
#include <srs_kernel_log.hpp>
#include <srs_kernel_utility.hpp>
#include <srs_protocol_io.hpp>
#include <srs_protocol_rtmp_stack.hpp>
#include <arpa/inet.h>
#include <ifaddrs.h>
#include <limits.h>
#include <map>
#include <math.h>
#include <net/if.h>
#include <netdb.h>
#include <sstream>
#include <stdlib.h>
#include <unistd.h>
using namespace std;
#include <srs_core_autofree.hpp>
#include <srs_kernel_consts.hpp>
#include <srs_kernel_error.hpp>
#include <srs_kernel_log.hpp>
#include <srs_kernel_utility.hpp>
#include <srs_protocol_http_stack.hpp>
#include <srs_protocol_st.hpp>
void srs_net_url_parse_tcurl(string tcUrl, string &schema, string &host, string &vhost, string &app, string &stream, int &port, string &param)
{
// Build the full URL with stream and param if provided
string fullUrl = tcUrl;
fullUrl += stream.empty() ? "/" : (stream.at(0) == '/' ? stream : "/" + stream);
fullUrl += param.empty() ? "" : (param.at(0) == '?' ? param : "?" + param);
// For compatibility, transform legacy ...vhost... format
// rtmp://ip/app...vhost...VHOST/stream
// to query parameter format:
// rtmp://ip/app?vhost=VHOST/stream
fullUrl = srs_strings_replace(fullUrl, "...vhost...", "?vhost=");
// Convert legacy RTMP URL format to standard format
// Legacy: rtmp://ip/app/app2?vhost=xxx/stream
// Standard: rtmp://ip/app/app2/stream?vhost=xxx
fullUrl = srs_net_url_convert_legacy_rtmp_url(fullUrl);
// Remove the _definst_ of FMLE URL.
if (fullUrl.find("/_definst_") != string::npos) {
fullUrl = srs_strings_replace(fullUrl, "/_definst_", "");
}
// Parse the standard URL using SrsHttpUri.
SrsHttpUri uri;
srs_error_t err = srs_success;
if ((err = uri.initialize(fullUrl)) != srs_success) {
srs_warn("Ignore parse url=%s err %s", fullUrl.c_str(), srs_error_desc(err).c_str());
srs_freep(err);
return;
}
// Extract basic URL components
schema = uri.get_schema();
host = uri.get_host();
port = uri.get_port();
stream = srs_path_filepath_base(uri.get_path());
param = uri.get_query().empty() ? "" : "?" + uri.get_query();
param += uri.get_fragment().empty() ? "" : "#" + uri.get_fragment();
// Parse app without the prefix slash.
app = srs_path_filepath_dir(uri.get_path());
if (!app.empty() && app.at(0) == '/')
app = app.substr(1);
if (app.empty())
app = SRS_CONSTS_RTMP_DEFAULT_APP;
// Discover vhost from query parameters, or use host if not specified.
string vhost_in_query = uri.get_query_by_key("vhost");
if (vhost_in_query.empty())
vhost_in_query = uri.get_query_by_key("domain");
if (!vhost_in_query.empty() && vhost_in_query != SRS_CONSTS_RTMP_DEFAULT_VHOST)
vhost = vhost_in_query;
if (vhost.empty())
vhost = host;
// Only one param, the default vhost, clear it.
if (param.find("&") == string::npos && vhost_in_query == SRS_CONSTS_RTMP_DEFAULT_VHOST) {
param = "";
}
}
string srs_net_url_convert_legacy_rtmp_url(const string &url)
{
// Check if this is a legacy RTMP URL format: rtmp://ip/app/app2?vhost=xxx/stream
// We need to convert it to standard format: rtmp://ip/app/app2/stream?vhost=xxx
// Find the query part starting with ?
size_t query_pos = url.find('?');
// Find the last slash in the URL
size_t last_slash_pos = url.rfind('/');
if (last_slash_pos == string::npos) {
// No slash in URL, return as is
return url;
}
// Check for normal legacy case: query exists and slash is after query
if (query_pos != string::npos && last_slash_pos > query_pos) {
// Normal legacy case: rtmp://ip/app/app2?vhost=xxx/stream
string base_url = url.substr(0, query_pos); // rtmp://ip/app/app2
string query_part = url.substr(query_pos, last_slash_pos - query_pos); // ?vhost=xxx
string stream_part = url.substr(last_slash_pos); // /stream
// Reconstruct as standard format: base_url + stream_part + query_part
return base_url + stream_part + query_part;
}
// No conversion needed, return as is
return url;
}
void srs_net_url_guess_stream(string &app, string &param, string &stream)
{
size_t pos = std::string::npos;
// Extract stream from app, if contains slash.
if ((pos = app.find("/")) != std::string::npos) {
stream = app.substr(pos + 1);
app = app.substr(0, pos);
if ((pos = stream.find("?")) != std::string::npos) {
param = stream.substr(pos);
stream = stream.substr(0, pos);
}
return;
}
// Extract stream from param, if contains slash.
if ((pos = param.find("/")) != std::string::npos) {
stream = param.substr(pos + 1);
param = param.substr(0, pos);
}
}
void srs_net_url_parse_query(string q, map<string, string> &query)
{
// query string flags.
static vector<string> flags;
if (flags.empty()) {
flags.push_back("=");
flags.push_back(",");
flags.push_back("&&");
flags.push_back("&");
flags.push_back(";");
}
vector<string> kvs = srs_strings_split(q, flags);
for (int i = 0; i < (int)kvs.size(); i += 2) {
string k = kvs.at(i);
string v = (i < (int)kvs.size() - 1) ? kvs.at(i + 1) : "";
query[k] = v;
}
}
string srs_net_url_encode_tcurl(string schema, string host, string vhost, string app, int port)
{
string tcUrl = schema + "://";
if (vhost == SRS_CONSTS_RTMP_DEFAULT_VHOST) {
tcUrl += host.empty() ? SRS_CONSTS_RTMP_DEFAULT_VHOST : host;
} else {
tcUrl += vhost;
}
if (port && port != SRS_CONSTS_RTMP_DEFAULT_PORT) {
tcUrl += ":" + srs_strconv_format_int(port);
}
tcUrl += "/" + app;
return tcUrl;
}
string srs_net_url_encode_stream(string host, string vhost, string stream, string param, bool with_vhost)
{
string url = stream;
string query = param;
// If no vhost in param, try to append one.
string guessVhost;
if (query.find("vhost=") == string::npos) {
if (vhost != SRS_CONSTS_RTMP_DEFAULT_VHOST) {
guessVhost = vhost;
} else if (!srs_net_is_ipv4(host)) {
guessVhost = host;
}
}
// Well, if vhost exists, always append in query string.
if (!guessVhost.empty() && query.find("vhost=") == string::npos) {
query += "&vhost=" + guessVhost;
}
// If not pass in query, remove it.
if (!with_vhost) {
size_t pos = query.find("&vhost=");
if (pos == string::npos) {
pos = query.find("vhost=");
}
size_t end = query.find("&", pos + 1);
if (end == string::npos) {
end = query.length();
}
if (pos != string::npos && end != string::npos && end > pos) {
query = query.substr(0, pos) + query.substr(end);
}
}
// Remove the start & and ? when param is empty.
query = srs_strings_trim_start(query, "&?");
// Prefix query with ?.
if (!query.empty() && !srs_strings_starts_with(query, "?")) {
url += "?";
}
// Append query to url.
if (!query.empty()) {
url += query;
}
return url;
}
string srs_net_url_encode_sid(string vhost, string app, string stream)
{
std::string url = "";
if (SRS_CONSTS_RTMP_DEFAULT_VHOST != vhost) {
url += vhost;
}
url += "/" + app;
// Note that we ignore any extension.
url += "/" + srs_path_filepath_filename(stream);
return url;
}
void srs_net_url_parse_rtmp_url(string url, string &tcUrl, string &stream)
{
size_t pos;
if ((pos = url.rfind("/")) != string::npos) {
stream = url.substr(pos + 1);
tcUrl = url.substr(0, pos);
} else {
tcUrl = url;
}
}
string srs_net_url_encode_rtmp_url(string server, int port, string host, string vhost, string app, string stream, string param)
{
string tcUrl = "rtmp://" + server + ":" + srs_strconv_format_int(port) + "/" + app;
string streamWithQuery = srs_net_url_encode_stream(host, vhost, stream, param);
string url = tcUrl + "/" + streamWithQuery;
return url;
}
srs_error_t srs_do_rtmp_create_msg(char type, uint32_t timestamp, char *data, int size, int stream_id, SrsCommonMessage **ppmsg)
{
srs_error_t err = srs_success;
*ppmsg = NULL;
SrsCommonMessage *msg = NULL;
if (type == SrsFrameTypeAudio) {
SrsMessageHeader header;
header.initialize_audio(size, timestamp, stream_id);
msg = new SrsCommonMessage();
if ((err = msg->create(&header, data, size)) != srs_success) {
srs_freep(msg);
return srs_error_wrap(err, "create message");
}
} else if (type == SrsFrameTypeVideo) {
SrsMessageHeader header;
header.initialize_video(size, timestamp, stream_id);
msg = new SrsCommonMessage();
if ((err = msg->create(&header, data, size)) != srs_success) {
srs_freep(msg);
return srs_error_wrap(err, "create message");
}
} else if (type == SrsFrameTypeScript) {
SrsMessageHeader header;
header.initialize_amf0_script(size, stream_id);
msg = new SrsCommonMessage();
if ((err = msg->create(&header, data, size)) != srs_success) {
srs_freep(msg);
return srs_error_wrap(err, "create message");
}
} else {
return srs_error_new(ERROR_STREAM_CASTER_FLV_TAG, "unknown tag=%#x", (uint8_t)type);
}
*ppmsg = msg;
return err;
}
srs_error_t srs_rtmp_create_msg(char type, uint32_t timestamp, char *data, int size, int stream_id, SrsCommonMessage **ppmsg)
{
srs_error_t err = srs_success;
// only when failed, we must free the data.
if ((err = srs_do_rtmp_create_msg(type, timestamp, data, size, stream_id, ppmsg)) != srs_success) {
srs_freepa(data);
return srs_error_wrap(err, "create message");
}
return err;
}
srs_error_t srs_write_large_iovs(ISrsProtocolReadWriter *skt, iovec *iovs, int size, ssize_t *pnwrite)
{
srs_error_t err = srs_success;
// the limits of writev iovs.
// for linux, generally it's 1024.
static int limits = (int)sysconf(_SC_IOV_MAX);
// send in a time.
if (size <= limits) {
if ((err = skt->writev(iovs, size, pnwrite)) != srs_success) {
return srs_error_wrap(err, "writev");
}
return err;
}
// send in multiple times.
int cur_iov = 0;
ssize_t nwrite = 0;
while (cur_iov < size) {
int cur_count = srs_min(limits, size - cur_iov);
if ((err = skt->writev(iovs + cur_iov, cur_count, &nwrite)) != srs_success) {
return srs_error_wrap(err, "writev");
}
cur_iov += cur_count;
if (pnwrite) {
*pnwrite += nwrite;
}
}
return err;
}
// we detect all network device as internet or intranet device, by its ip address.
// key is device name, for instance, eth0
// value is whether internet, for instance, true.
static std::map<std::string, bool> _srs_device_ifs;
bool srs_net_device_is_internet(string ifname)
{
srs_info("check ifname=%s", ifname.c_str());
if (_srs_device_ifs.find(ifname) == _srs_device_ifs.end()) {
return false;
}
return _srs_device_ifs[ifname];
}
bool srs_net_device_is_internet(const sockaddr *addr)
{
if (addr->sa_family == AF_INET) {
const in_addr inaddr = ((sockaddr_in *)addr)->sin_addr;
const uint32_t addr_h = ntohl(inaddr.s_addr);
// lo, 127.0.0.0-127.0.0.1
if (addr_h >= 0x7f000000 && addr_h <= 0x7f000001) {
return false;
}
// Class A 10.0.0.0-10.255.255.255
if (addr_h >= 0x0a000000 && addr_h <= 0x0affffff) {
return false;
}
// Class B 172.16.0.0-172.31.255.255
if (addr_h >= 0xac100000 && addr_h <= 0xac1fffff) {
return false;
}
// Class C 192.168.0.0-192.168.255.255
if (addr_h >= 0xc0a80000 && addr_h <= 0xc0a8ffff) {
return false;
}
} else if (addr->sa_family == AF_INET6) {
const sockaddr_in6 *a6 = (const sockaddr_in6 *)addr;
// IPv6 loopback is ::1
if (IN6_IS_ADDR_LOOPBACK(&a6->sin6_addr)) {
return false;
}
// IPv6 unspecified is ::
if (IN6_IS_ADDR_UNSPECIFIED(&a6->sin6_addr)) {
return false;
}
// From IPv4, you might know APIPA (Automatic Private IP Addressing) or AutoNet.
// Whenever automatic IP configuration through DHCP fails.
// The prefix of a site-local address is FE80::/10.
if (IN6_IS_ADDR_LINKLOCAL(&a6->sin6_addr)) {
return false;
}
// Site-local addresses are equivalent to private IP addresses in IPv4.
// The prefix of a site-local address is FEC0::/10.
// https://4sysops.com/archives/ipv6-tutorial-part-6-site-local-addresses-and-link-local-addresses/
if (IN6_IS_ADDR_SITELOCAL(&a6->sin6_addr)) {
return false;
}
// Others.
if (IN6_IS_ADDR_MULTICAST(&a6->sin6_addr)) {
return false;
}
if (IN6_IS_ADDR_MC_NODELOCAL(&a6->sin6_addr)) {
return false;
}
if (IN6_IS_ADDR_MC_LINKLOCAL(&a6->sin6_addr)) {
return false;
}
if (IN6_IS_ADDR_MC_SITELOCAL(&a6->sin6_addr)) {
return false;
}
if (IN6_IS_ADDR_MC_ORGLOCAL(&a6->sin6_addr)) {
return false;
}
if (IN6_IS_ADDR_MC_GLOBAL(&a6->sin6_addr)) {
return false;
}
}
return true;
}
vector<SrsIPAddress *> _srs_system_ips;
void discover_network_iface(ifaddrs *cur, vector<SrsIPAddress *> &ips, stringstream &ss0, stringstream &ss1, bool ipv6, bool loopback)
{
char saddr[64];
char *h = (char *)saddr;
socklen_t nbh = (socklen_t)sizeof(saddr);
const int r0 = getnameinfo(cur->ifa_addr, sizeof(sockaddr_storage), h, nbh, NULL, 0, NI_NUMERICHOST);
if (r0) {
srs_warn("convert local ip failed: %s", gai_strerror(r0));
return;
}
std::string ip(saddr, strlen(saddr));
ss0 << ", iface[" << (int)ips.size() << "] " << cur->ifa_name << " " << (ipv6 ? "ipv6" : "ipv4")
<< " 0x" << std::hex << cur->ifa_flags << std::dec << " " << ip;
SrsIPAddress *ip_address = new SrsIPAddress();
ip_address->ip = ip;
ip_address->is_ipv4 = !ipv6;
ip_address->is_loopback = loopback;
ip_address->ifname = cur->ifa_name;
ip_address->is_internet = srs_net_device_is_internet(cur->ifa_addr);
ips.push_back(ip_address);
// set the device internet status.
if (!ip_address->is_internet) {
ss1 << ", intranet ";
_srs_device_ifs[cur->ifa_name] = false;
} else {
ss1 << ", internet ";
_srs_device_ifs[cur->ifa_name] = true;
}
ss1 << cur->ifa_name << " " << ip;
}
void retrieve_local_ips()
{
vector<SrsIPAddress *> &ips = _srs_system_ips;
// Get the addresses.
ifaddrs *ifap;
if (getifaddrs(&ifap) == -1) {
srs_warn("retrieve local ips, getifaddrs failed.");
return;
}
stringstream ss0;
ss0 << "ips";
stringstream ss1;
ss1 << "devices";
// Discover IPv4 first.
for (ifaddrs *p = ifap; p; p = p->ifa_next) {
ifaddrs *cur = p;
// Ignore if no address for this interface.
// @see https://github.com/ossrs/srs/issues/1087#issuecomment-408847115
if (!cur->ifa_addr) {
continue;
}
// retrieve IP address, ignore the tun0 network device, whose addr is NULL.
// @see: https://github.com/ossrs/srs/issues/141
bool ipv4 = (cur->ifa_addr->sa_family == AF_INET);
bool ready = (cur->ifa_flags & IFF_UP) && (cur->ifa_flags & IFF_RUNNING);
// Ignore IFF_PROMISC(Interface is in promiscuous mode), which may be set by Wireshark.
bool ignored = (!cur->ifa_addr) || (cur->ifa_flags & IFF_LOOPBACK) || (cur->ifa_flags & IFF_POINTOPOINT);
bool loopback = (cur->ifa_flags & IFF_LOOPBACK);
if (ipv4 && ready && !ignored) {
discover_network_iface(cur, ips, ss0, ss1, false, loopback);
}
}
// Then, discover IPv6 addresses.
for (ifaddrs *p = ifap; p; p = p->ifa_next) {
ifaddrs *cur = p;
// Ignore if no address for this interface.
// @see https://github.com/ossrs/srs/issues/1087#issuecomment-408847115
if (!cur->ifa_addr) {
continue;
}
// retrieve IP address, ignore the tun0 network device, whose addr is NULL.
// @see: https://github.com/ossrs/srs/issues/141
bool ipv6 = (cur->ifa_addr->sa_family == AF_INET6);
bool ready = (cur->ifa_flags & IFF_UP) && (cur->ifa_flags & IFF_RUNNING);
bool ignored = (!cur->ifa_addr) || (cur->ifa_flags & IFF_POINTOPOINT) || (cur->ifa_flags & IFF_PROMISC) || (cur->ifa_flags & IFF_LOOPBACK);
bool loopback = (cur->ifa_flags & IFF_LOOPBACK);
if (ipv6 && ready && !ignored) {
discover_network_iface(cur, ips, ss0, ss1, true, loopback);
}
}
// If empty, disover IPv4 loopback.
if (ips.empty()) {
for (ifaddrs *p = ifap; p; p = p->ifa_next) {
ifaddrs *cur = p;
// Ignore if no address for this interface.
// @see https://github.com/ossrs/srs/issues/1087#issuecomment-408847115
if (!cur->ifa_addr) {
continue;
}
// retrieve IP address, ignore the tun0 network device, whose addr is NULL.
// @see: https://github.com/ossrs/srs/issues/141
bool ipv4 = (cur->ifa_addr->sa_family == AF_INET);
bool ready = (cur->ifa_flags & IFF_UP) && (cur->ifa_flags & IFF_RUNNING);
bool ignored = (!cur->ifa_addr) || (cur->ifa_flags & IFF_POINTOPOINT) || (cur->ifa_flags & IFF_PROMISC);
bool loopback = (cur->ifa_flags & IFF_LOOPBACK);
if (ipv4 && ready && !ignored) {
discover_network_iface(cur, ips, ss0, ss1, false, loopback);
}
}
}
srs_trace("%s", ss0.str().c_str());
srs_trace("%s", ss1.str().c_str());
freeifaddrs(ifap);
}
vector<SrsIPAddress *> &srs_get_local_ips()
{
if (_srs_system_ips.empty()) {
retrieve_local_ips();
}
return _srs_system_ips;
}
std::string _public_internet_address;
string srs_get_public_internet_address(bool ipv4_only)
{
if (!_public_internet_address.empty()) {
return _public_internet_address;
}
std::vector<SrsIPAddress *> &ips = srs_get_local_ips();
// find the best match public address.
for (int i = 0; i < (int)ips.size(); i++) {
SrsIPAddress *ip = ips[i];
if (!ip->is_internet) {
continue;
}
if (ipv4_only && !ip->is_ipv4) {
continue;
}
srs_warn("use public address as ip: %s, ifname=%s", ip->ip.c_str(), ip->ifname.c_str());
_public_internet_address = ip->ip;
return ip->ip;
}
// no public address, use private address.
for (int i = 0; i < (int)ips.size(); i++) {
SrsIPAddress *ip = ips[i];
if (ip->is_loopback) {
continue;
}
if (ipv4_only && !ip->is_ipv4) {
continue;
}
srs_warn("use private address as ip: %s, ifname=%s", ip->ip.c_str(), ip->ifname.c_str());
_public_internet_address = ip->ip;
return ip->ip;
}
// Finally, use first whatever kind of address.
if (!ips.empty() && _public_internet_address.empty()) {
SrsIPAddress *ip = ips[0];
srs_warn("use first address as ip: %s, ifname=%s", ip->ip.c_str(), ip->ifname.c_str());
_public_internet_address = ip->ip;
return ip->ip;
}
return "";
}
string srs_get_original_ip(ISrsHttpMessage *r)
{
SrsHttpHeader *h = r->header();
string x_forwarded_for = h->get("X-Forwarded-For");
if (!x_forwarded_for.empty()) {
size_t pos = string::npos;
if ((pos = x_forwarded_for.find(",")) == string::npos) {
return x_forwarded_for;
}
return x_forwarded_for.substr(0, pos);
}
string x_real_ip = h->get("X-Real-IP");
if (!x_real_ip.empty()) {
size_t pos = string::npos;
if ((pos = x_real_ip.find(":")) == string::npos) {
return x_real_ip;
}
return x_real_ip.substr(0, pos);
}
return "";
}
std::string _srs_system_hostname;
string srs_get_system_hostname()
{
if (!_srs_system_hostname.empty()) {
return _srs_system_hostname;
}
char buf[256];
if (-1 == gethostname(buf, sizeof(buf))) {
srs_warn("gethostbyname fail");
return "";
}
_srs_system_hostname = std::string(buf);
return _srs_system_hostname;
}
#if defined(__linux__) || defined(SRS_OSX)
utsname *srs_get_system_uname_info()
{
static utsname *system_info = NULL;
if (system_info != NULL) {
return system_info;
}
system_info = new utsname();
memset(system_info, 0, sizeof(utsname));
if (uname(system_info) < 0) {
srs_warn("uname failed");
}
return system_info;
}
#endif
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