+#include <arpa/inet.h>
+#include <assert.h>
+#include <ctype.h>
+#include <stdint.h>
#include <stdio.h>
-#include <string.h>
#include <stdlib.h>
-#include <ctype.h>
-#include <assert.h>
-#include <vector>
+#include <string.h>
+#include <sys/socket.h>
+#include <map>
#include <string>
+#include <utility>
+#include <vector>
+#include "acceptor.h"
#include "config.h"
+#include "log.h"
#include "parse.h"
using namespace std;
-vector<ConfigLine> parse_config(const string &filename)
+#define DEFAULT_BACKLOG_SIZE 1048576
+
+struct ConfigLine {
+ string keyword;
+ vector<string> arguments;
+ map<string, string> parameters;
+};
+
+namespace {
+
+bool parse_hostport(const string &hostport, sockaddr_in6 *addr)
{
- vector<ConfigLine> ret;
+ memset(addr, 0, sizeof(*addr));
+ addr->sin6_family = AF_INET6;
+
+ string port_string;
+
+ // See if the argument if on the type [ipv6addr]:port.
+ if (!hostport.empty() && hostport[0] == '[') {
+ size_t split = hostport.find("]:");
+ if (split == string::npos) {
+ log(ERROR, "address '%s' is malformed; must be either [ipv6addr]:port or ipv4addr:port");
+ return false;
+ }
+
+ string host(hostport.begin() + 1, hostport.begin() + split);
+ port_string = hostport.substr(split + 2);
+
+ if (inet_pton(AF_INET6, host.c_str(), &addr->sin6_addr) != 1) {
+ log(ERROR, "'%s' is not a valid IPv6 address");
+ return false;
+ }
+ } else {
+ // OK, then it must be ipv4addr:port.
+ size_t split = hostport.find(":");
+ if (split == string::npos) {
+ log(ERROR, "address '%s' is malformed; must be either [ipv6addr]:port or ipv4addr:port");
+ return false;
+ }
+
+ string host(hostport.begin(), hostport.begin() + split);
+ port_string = hostport.substr(split + 1);
+
+ // Parse to an IPv4 address, then construct a mapped-v4 address from that.
+ in_addr addr4;
+
+ if (inet_pton(AF_INET, host.c_str(), &addr4) != 1) {
+ log(ERROR, "'%s' is not a valid IPv4 address");
+ return false;
+ }
+
+ addr->sin6_addr.s6_addr32[2] = htonl(0xffff);
+ addr->sin6_addr.s6_addr32[3] = addr4.s_addr;
+ }
+
+ int port = atoi(port_string.c_str());
+ if (port < 1 || port >= 65536) {
+ log(ERROR, "port %d is out of range (must be [1,65536>).", port);
+ return false;
+ }
+ addr->sin6_port = ntohs(port);
+
+ return true;
+}
+bool read_config(const string &filename, vector<ConfigLine> *lines)
+{
FILE *fp = fopen(filename.c_str(), "r");
if (fp == NULL) {
- perror(filename.c_str());
- exit(1);
+ log_perror(filename.c_str());
+ return false;
}
char buf[4096];
}
}
- ret.push_back(line);
+ lines->push_back(line);
}
- fclose(fp);
- return ret;
+ if (fclose(fp) == EOF) {
+ log_perror(filename.c_str());
+ return false;
+ }
+ return true;
}
-string fetch_config_string(const vector<ConfigLine> &config, const string &keyword,
- ParameterType parameter_type, const string &default_value)
+bool fetch_config_string(const vector<ConfigLine> &config, const string &keyword, string *value)
{
- assert(parameter_type == PARAMATER_MANDATORY || parameter_type == PARAMETER_OPTIONAL);
for (unsigned i = 0; i < config.size(); ++i) {
if (config[i].keyword != keyword) {
continue;
}
if (config[i].parameters.size() > 0 ||
config[i].arguments.size() != 1) {
- fprintf(stderr, "ERROR: '%s' takes one argument and no parameters\n", keyword.c_str());
- exit(1);
+ log(ERROR, "'%s' takes one argument and no parameters", keyword.c_str());
+ return false;
}
- return config[i].arguments[0];
- }
- if (parameter_type == PARAMATER_MANDATORY) {
- fprintf(stderr, "ERROR: Missing '%s' statement in config file.\n",
- keyword.c_str());
- exit(1);
- } else {
- return default_value;
+ *value = config[i].arguments[0];
+ return true;
}
+ return false;
}
-int fetch_config_int(const std::vector<ConfigLine> &config, const std::string &keyword,
- int min_limit, int max_limit,
- ParameterType parameter_type, int default_value)
+bool fetch_config_int(const vector<ConfigLine> &config, const string &keyword, int *value)
{
- assert(parameter_type == PARAMATER_MANDATORY || parameter_type == PARAMETER_OPTIONAL);
- bool value_found = false;
- int value = -1;
for (unsigned i = 0; i < config.size(); ++i) {
if (config[i].keyword != keyword) {
continue;
}
if (config[i].parameters.size() > 0 ||
config[i].arguments.size() != 1) {
- fprintf(stderr, "ERROR: '%s' takes one argument and no parameters\n", keyword.c_str());
- exit(1);
+ log(ERROR, "'%s' takes one argument and no parameters", keyword.c_str());
+ return false;
}
- value_found = true;
- value = atoi(config[i].arguments[0].c_str()); // TODO: verify int validity.
+ *value = atoi(config[i].arguments[0].c_str()); // TODO: verify int validity.
+ return true;
+ }
+ return false;
+}
+
+bool parse_port(const ConfigLine &line, Config *config)
+{
+ if (line.arguments.size() != 1) {
+ log(ERROR, "'port' takes exactly one argument");
+ return false;
+ }
+
+ int port = atoi(line.arguments[0].c_str());
+ if (port < 1 || port >= 65536) {
+ log(ERROR, "port %d is out of range (must be [1,65536>).", port);
+ return false;
+ }
+
+ AcceptorConfig acceptor;
+ acceptor.addr = CreateAnyAddress(port);
+
+ config->acceptors.push_back(acceptor);
+ return true;
+}
+
+bool parse_listen(const ConfigLine &line, Config *config)
+{
+ if (line.arguments.size() != 1) {
+ log(ERROR, "'listen' takes exactly one argument");
+ return false;
+ }
+
+ AcceptorConfig acceptor;
+ if (!parse_hostport(line.arguments[0], &acceptor.addr)) {
+ return false;
+ }
+ config->acceptors.push_back(acceptor);
+ return true;
+}
+
+bool parse_stream(const ConfigLine &line, Config *config)
+{
+ if (line.arguments.size() != 1) {
+ log(ERROR, "'stream' takes exactly one argument");
+ return false;
+ }
+
+ StreamConfig stream;
+ stream.url = line.arguments[0];
+
+ map<string, string>::const_iterator src_it = line.parameters.find("src");
+ if (src_it == line.parameters.end()) {
+ log(WARNING, "stream '%s' has no src= attribute, clients will not get any data.",
+ stream.url.c_str());
+ } else {
+ stream.src = src_it->second;
+ // TODO: Verify that the URL is parseable?
+ }
+
+ map<string, string>::const_iterator backlog_it = line.parameters.find("backlog_size");
+ if (backlog_it == line.parameters.end()) {
+ stream.backlog_size = DEFAULT_BACKLOG_SIZE;
+ } else {
+ stream.backlog_size = atoi(backlog_it->second.c_str());
+ }
+
+ // Parse encoding.
+ map<string, string>::const_iterator encoding_parm_it = line.parameters.find("encoding");
+ if (encoding_parm_it == line.parameters.end() ||
+ encoding_parm_it->second == "raw") {
+ stream.encoding = StreamConfig::STREAM_ENCODING_RAW;
+ } else if (encoding_parm_it->second == "metacube") {
+ stream.encoding = StreamConfig::STREAM_ENCODING_METACUBE;
+ } else {
+ log(ERROR, "Parameter 'encoding' must be either 'raw' (default) or 'metacube'");
+ return false;
+ }
+
+ // Parse the pacing rate, converting from kilobits to bytes as needed.
+ map<string, string>::const_iterator pacing_rate_it = line.parameters.find("pacing_rate_kbit");
+ if (pacing_rate_it == line.parameters.end()) {
+ stream.pacing_rate = ~0U;
+ } else {
+ stream.pacing_rate = atoi(pacing_rate_it->second.c_str()) * 1024 / 8;
+ }
+
+ config->streams.push_back(stream);
+ return true;
+}
+
+bool parse_udpstream(const ConfigLine &line, Config *config)
+{
+ if (line.arguments.size() != 1) {
+ log(ERROR, "'udpstream' takes exactly one argument");
+ return false;
+ }
+
+ UDPStreamConfig udpstream;
+
+ string hostport = line.arguments[0];
+ if (!parse_hostport(hostport, &udpstream.dst)) {
+ return false;
+ }
+
+ map<string, string>::const_iterator src_it = line.parameters.find("src");
+ if (src_it == line.parameters.end()) {
+ // This is pretty meaningless, but OK, consistency is good.
+ log(WARNING, "udpstream to %s has no src= attribute, clients will not get any data.",
+ hostport.c_str());
+ } else {
+ udpstream.src = src_it->second;
+ // TODO: Verify that the URL is parseable?
+ }
+
+ // Parse the pacing rate, converting from kilobits to bytes as needed.
+ map<string, string>::const_iterator pacing_rate_it = line.parameters.find("pacing_rate_kbit");
+ if (pacing_rate_it == line.parameters.end()) {
+ udpstream.pacing_rate = ~0U;
+ } else {
+ udpstream.pacing_rate = atoi(pacing_rate_it->second.c_str()) * 1024 / 8;
+ }
+
+ // Parse the TTL. The same value is used for unicast and multicast.
+ map<string, string>::const_iterator ttl_it = line.parameters.find("ttl");
+ if (ttl_it == line.parameters.end()) {
+ udpstream.ttl = -1;
+ } else {
+ udpstream.ttl = atoi(ttl_it->second.c_str());
+ }
+
+ config->udpstreams.push_back(udpstream);
+ return true;
+}
+
+bool parse_error_log(const ConfigLine &line, Config *config)
+{
+ if (line.arguments.size() != 0) {
+ log(ERROR, "'error_log' takes no arguments (only parameters type= and filename=)");
+ return false;
}
- if (!value_found) {
- if (parameter_type == PARAMETER_OPTIONAL) {
- return default_value;
+
+ LogConfig log_config;
+ map<string, string>::const_iterator type_it = line.parameters.find("type");
+ if (type_it == line.parameters.end()) {
+ log(ERROR, "'error_log' has no type= parameter");
+ return false;
+ }
+
+ string type = type_it->second;
+ if (type == "file") {
+ log_config.type = LogConfig::LOG_TYPE_FILE;
+ } else if (type == "syslog") {
+ log_config.type = LogConfig::LOG_TYPE_SYSLOG;
+ } else if (type == "console") {
+ log_config.type = LogConfig::LOG_TYPE_CONSOLE;
+ } else {
+ log(ERROR, "Unknown log type '%s'", type.c_str());
+ return false;
+ }
+
+ if (log_config.type == LogConfig::LOG_TYPE_FILE) {
+ map<string, string>::const_iterator filename_it = line.parameters.find("filename");
+ if (filename_it == line.parameters.end()) {
+ log(ERROR, "error_log type 'file' with no filename= parameter");
+ return false;
}
- fprintf(stderr, "ERROR: Missing '%s' statement in config file.\n",
- keyword.c_str());
- exit(1);
+ log_config.filename = filename_it->second;
+ }
+
+ config->log_destinations.push_back(log_config);
+ return true;
+}
+
+} // namespace
+
+bool parse_config(const string &filename, Config *config)
+{
+ vector<ConfigLine> lines;
+ if (!read_config(filename, &lines)) {
+ return false;
+ }
+
+ config->daemonize = false;
+
+ if (!fetch_config_int(lines, "num_servers", &config->num_servers)) {
+ log(ERROR, "Missing 'num_servers' statement in config file.");
+ return false;
+ }
+ if (config->num_servers < 1 || config->num_servers >= 20000) { // Insanely high max limit.
+ log(ERROR, "'num_servers' is %d, needs to be in [1, 20000>.", config->num_servers);
+ return false;
+ }
+
+ // See if the user wants stats.
+ config->stats_interval = 60;
+ bool has_stats_file = fetch_config_string(lines, "stats_file", &config->stats_file);
+ bool has_stats_interval = fetch_config_int(lines, "stats_interval", &config->stats_interval);
+ if (has_stats_interval && !has_stats_file) {
+ log(WARNING, "'stats_interval' given, but no 'stats_file'. No client statistics will be written.");
}
- if (value < min_limit || value > max_limit) {
- fprintf(stderr, "ERROR: '%s' is set to %d, must be in [%d,%d]\n",
- keyword.c_str(), value, min_limit, max_limit);
- exit(1);
+
+ config->input_stats_interval = 60;
+ bool has_input_stats_file = fetch_config_string(lines, "input_stats_file", &config->input_stats_file);
+ bool has_input_stats_interval = fetch_config_int(lines, "input_stats_interval", &config->input_stats_interval);
+ if (has_input_stats_interval && !has_input_stats_file) {
+ log(WARNING, "'input_stats_interval' given, but no 'input_stats_file'. No input statistics will be written.");
+ }
+
+ fetch_config_string(lines, "access_log", &config->access_log_file);
+
+ for (size_t i = 0; i < lines.size(); ++i) {
+ const ConfigLine &line = lines[i];
+ if (line.keyword == "num_servers" ||
+ line.keyword == "stats_file" ||
+ line.keyword == "stats_interval" ||
+ line.keyword == "input_stats_file" ||
+ line.keyword == "input_stats_interval" ||
+ line.keyword == "access_log") {
+ // Already taken care of, above.
+ } else if (line.keyword == "port") {
+ if (!parse_port(line, config)) {
+ return false;
+ }
+ } else if (line.keyword == "listen") {
+ if (!parse_listen(line, config)) {
+ return false;
+ }
+ } else if (line.keyword == "stream") {
+ if (!parse_stream(line, config)) {
+ return false;
+ }
+ } else if (line.keyword == "udpstream") {
+ if (!parse_udpstream(line, config)) {
+ return false;
+ }
+ } else if (line.keyword == "error_log") {
+ if (!parse_error_log(line, config)) {
+ return false;
+ }
+ } else if (line.keyword == "daemonize") {
+ config->daemonize = true;
+ } else {
+ log(ERROR, "Unknown configuration keyword '%s'.",
+ line.keyword.c_str());
+ return false;
+ }
}
- return value;
+
+ return true;
}
projects / cubemap / blobdiff