netdata/src/web_server.c at master · imcom/netdata · GitHub

History

270 lines (218 loc) · 6.37 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <unistd.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <errno.h>

#include <pthread.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <netinet/tcp.h>

#include <malloc.h>

#include "common.h"

#include "log.h"

#include "appconfig.h"

#include "url.h"

#include "web_buffer.h"

#include "web_client.h"

#include "web_server.h"

#include "global_statistics.h"

#include "rrd.h"

#include "rrd2json.h"

#include "../config.h"

int listen_backlog = LISTEN_BACKLOG;

int listen_fd = -1;

int listen_port = LISTEN_PORT;

#ifdef NETDATA_INTERNAL_CHECKS

static void log_allocations(void)

{

static int mem = 0;

struct mallinfo mi;

mi = mallinfo();

if(mi.uordblks > mem) {

int clients = 0;

struct web_client *w;

for(w = web_clients; w ; w = w->next) clients++;

info("Allocated memory increased from %d to %d (increased by %d bytes). There are %d web clients connected.", mem, mi.uordblks, mi.uordblks - mem, clients);

mem = mi.uordblks;

}

#endif

static int is_ip_anything(const char *ip)

{

if(!ip || !*ip

|| !strcmp(ip, "any")

|| !strcmp(ip, "all")

|| !strcmp(ip, "*")

|| !strcmp(ip, "::")

|| !strcmp(ip, "0.0.0.0")

) return 1;

return 0;

}

int create_listen_socket4(const char *ip, int port, int listen_backlog)

{

int sock;

int sockopt = 1;

struct sockaddr_in name;

debug(D_LISTENER, "IPv4 creating new listening socket on port %d", port);

sock = socket(AF_INET, SOCK_STREAM, 0);

if(sock < 0) {

error("IPv4 socket() failed.");

return -1;

}

/* avoid "address already in use" */

setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt));

memset(&name, 0, sizeof(struct sockaddr_in));

name.sin_family = AF_INET;

name.sin_port = htons (port);

if(is_ip_anything(ip)) {

name.sin_addr.s_addr = htonl(INADDR_ANY);

info("Listening on any IPs (IPv4).");

}

else {

int ret = inet_pton(AF_INET, ip, (void *)&name.sin_addr.s_addr);

if(ret != 1) {

error("Failed to convert IP '%s' to a valid IPv4 address.", ip);

close(sock);

return -1;

}

info("Listening on IP '%s' (IPv4).", ip);

}

if(bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) {

close(sock);

error("IPv4 bind() failed.");

return -1;

}

if(listen(sock, listen_backlog) < 0) {

close(sock);

fatal("IPv4 listen() failed.");

return -1;

}

debug(D_LISTENER, "IPv4 listening port %d created", port);

return sock;

}

int create_listen_socket6(const char *ip, int port, int listen_backlog)

{

int sock = -1;

int sockopt = 1;

struct sockaddr_in6 name;

debug(D_LISTENER, "IPv6 creating new listening socket on port %d", port);

sock = socket(AF_INET6, SOCK_STREAM, 0);

if (sock < 0) {

error("IPv6 socket() failed. Disabling IPv6.");

return -1;

}

/* avoid "address already in use" */

setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt));

memset(&name, 0, sizeof(struct sockaddr_in6));

name.sin6_family = AF_INET6;

name.sin6_port = htons ((uint16_t) port);

if(is_ip_anything(ip)) {

name.sin6_addr = in6addr_any;

info("Listening on all IPs (IPv6 and IPv4)");

}

else {

int ret = inet_pton(AF_INET6, ip, (void *)&name.sin6_addr.s6_addr);

if(ret != 1) {

error("Failed to convert IP '%s' to a valid IPv6 address. Disabling IPv6.", ip);

close(sock);

return -1;

}

info("Listening on IP '%s' (IPv6)", ip);

}

name.sin6_scope_id = 0;

if (bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) {

close(sock);

error("IPv6 bind() failed. Disabling IPv6.");

return -1;

}

if (listen(sock, listen_backlog) < 0) {

close(sock);

error("IPv6 listen() failed. Disabling IPv6.");

return -1;

}

debug(D_LISTENER, "IPv6 listening port %d created", port);

return sock;

}

// --------------------------------------------------------------------------------------

// the main socket listener

// 1. it accepts new incoming requests on our port

// 2. creates a new web_client for each connection received

// 3. spawns a new pthread to serve the client (this is optimal for keep-alive clients)

// 4. cleans up old web_clients that their pthreads have been exited

void *socket_listen_main(void *ptr)

{

if(ptr) { ; }

info("WEB SERVER thread created with task id %d", gettid());

struct web_client *w;

struct timeval tv;

int retval;

if(ptr) { ; }

if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)

error("Cannot set pthread cancel type to DEFERRED.");

if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)

error("Cannot set pthread cancel state to ENABLE.");

web_client_timeout = (int) config_get_number("global", "disconnect idle web clients after seconds", DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS);

web_enable_gzip = config_get_boolean("global", "enable web responses gzip compression", web_enable_gzip);

if(listen_fd < 0) fatal("LISTENER: Listen socket is not ready.");

fd_set ifds, ofds, efds;

int fdmax = listen_fd;

FD_ZERO (&ifds);

FD_ZERO (&ofds);

FD_ZERO (&efds);

for(;;) {

tv.tv_sec = 0;

tv.tv_usec = 200000;

if(listen_fd >= 0) {

FD_SET(listen_fd, &ifds);

FD_SET(listen_fd, &efds);

}

// debug(D_WEB_CLIENT, "LISTENER: Waiting...");

retval = select(fdmax+1, &ifds, &ofds, &efds, &tv);

if(retval == -1) {

error("LISTENER: select() failed.");

continue;

}

else if(retval) {

// check for new incoming connections

if(FD_ISSET(listen_fd, &ifds)) {

w = web_client_create(listen_fd);

if(unlikely(!w)) {

// no need for error log - web_client_create already logged the error

continue;

}

if(pthread_create(&w->thread, NULL, web_client_main, w) != 0) {

error("%llu: failed to create new thread for web client.");

w->obsolete = 1;

}

else if(pthread_detach(w->thread) != 0) {

error("%llu: Cannot request detach of newly created web client thread.", w->id);

w->obsolete = 1;

}

else debug(D_WEB_CLIENT, "LISTENER: select() didn't do anything.");

}

//else {

// debug(D_WEB_CLIENT, "LISTENER: select() timeout.");

//}

// cleanup unused clients

for(w = web_clients; w ; w = w?w->next:NULL) {

if(w->obsolete) {

debug(D_WEB_CLIENT, "%llu: Removing client.", w->id);

// pthread_join(w->thread, NULL);

w = web_client_free(w);

#ifdef NETDATA_INTERNAL_CHECKS

log_allocations();

#endif

}

error("LISTENER: exit!");

if(listen_fd >= 0) close(listen_fd);

exit(2);

return NULL;

}

netdata/src/web_server.c at master · imcom/netdata · GitHub

Expand file tree

Breadcrumbs

web_server.c

Latest commit

History

Breadcrumbs

web_server.c

File metadata and controls