mistral.c

   1 #ifdef HAVE_CONFIG_H
   2 #include "config.h"
   3 #endif
   4
   5 #include "php.h"
   6 #include "ext/standard/info.h"
   7
   8 #include <sys/types.h>
   9 #include <sys/socket.h>
  10 #include <netinet/in.h>
  11 #include <arpa/inet.h>
  12 #include <netdb.h>
  13 #include <sys/time.h>
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16 #include <unistd.h>
  17 #include <string.h>
  18 #include <fcntl.h>
  19 #include <errno.h>
  20 #include <err.h>
  21 #include <stddef.h>
  22
  23 #include <ev.h>
  24
  25 #include "parser.h"
  26 #include "mistral.h"
  27
  28 /*
  29  * We did use some ideas from:
  30  *      https://sie.isc.org/svn/nmsg-httpk/trunk/nmsg-httpk.c
  31  *      http://github.com/ry/libebb/blob/master/ebb.c
  32  */
  33
  34 struct client {
  35         int fd;
  36
  37         ev_io ev_read;
  38         ev_io ev_write;
  39         ev_timer ev_timeout;
  40         ev_timer ev_goodbye;
  41
  42         struct ev_loop *loop;
  43         char *rbuff;
  44         int rlen;
  45
  46         int close;
  47 };
  48
  49 ev_io ev_accept;
  50 double timeout = 300;
  51
  52 typedef struct _php_event_callback_t { /* {{{ */
  53         zval *func;
  54         zval *arg;
  55 } php_event_callback_t;
  56 /* }}} */
  57
  58 php_event_callback_t *callback = NULL;
  59
  60 http_parser parser;
  61
  62 void http_field_cb(void *data, const char *field, size_t flen, const char *value, size_t vlen) {
  63         zval *server_vars = (zval *)data;
  64         char *fld = malloc(5 + flen + 1);
  65         char *val = strndup(value, vlen);
  66         size_t i;
  67
  68         strncpy(fld, "HTTP_", 5);
  69         for (i = 0; i < flen; i++) {
  70                 if (field[i] == '-')
  71                         fld[5+i] = '_';
  72                 else
  73                         fld[5+i] = toupper(field[i]);
  74         }
  75         fld[5+flen] = '\0';
  76
  77         add_assoc_string(server_vars, (char *)fld, (char *)val, 1);
  78         free(fld);
  79         free(val);
  80 }
  81
  82 void http_on_element(void *data, int type, const char *at, size_t length) {
  83         char *line, *val;
  84         zval *server_vars = (zval *)data;
  85
  86         switch( type ) {
  87                 case MONGREL_CONTENT_LENGTH:
  88                         line = "CONTENT_LENGTH";
  89                         break;
  90
  91                 case MONGREL_CONTENT_TYPE:
  92                         line = "CONTENT_TYPE";
  93                         break;
  94
  95                 case MONGREL_FRAGMENT:
  96                         line = "FRAGMENT";
  97                         break;
  98
  99                 case MONGREL_HTTP_VERSION:
 100                         line = "HTTP_VERSION";
 101                         break;
 102
 103                 case MONGREL_QUERY_STRING:
 104                         line = "QUERY_STRING";
 105                         break;
 106
 107                 case MONGREL_REQUEST_PATH:
 108                         line = "REQUEST_PATH";
 109                         break;
 110
 111                 case MONGREL_REQUEST_METHOD:
 112                         line = "REQUEST_METHOD";
 113                         break;
 114
 115                 case MONGREL_REQUEST_URI:
 116                         line = "REQUEST_URI";
 117                         break;
 118
 119                 default:
 120                         line = "UNKNOWN";
 121         }
 122
 123         val = strndup(at, length);
 124         add_assoc_string(server_vars, (char *) line, (char *) val, 1);
 125         free(val);
 126 }
 127
 128 static int setnonblock(int fd)
 129 {
 130         int flags;
 131
 132         flags = fcntl(fd, F_GETFL);
 133         if (flags < 0)
 134                 return flags;
 135         flags |= O_NONBLOCK;
 136         if (fcntl(fd, F_SETFL, flags) < 0)
 137                 return -1;
 138
 139         return 0;
 140 }
 141
 142 static inline void _php_event_callback_free(php_event_callback_t *this_callback) /* {{{ */
 143 {
 144         if (!this_callback)
 145                 return;
 146
 147         zval_ptr_dtor(&this_callback->func);
 148         if (this_callback->arg)
 149                 zval_ptr_dtor(&this_callback->arg);
 150
 151         efree(this_callback);
 152 }
 153
 154 static void timeout_cb(struct ev_loop *loop, struct ev_timer *w, int revents) {
 155         struct client *cli = (struct client *) w->data;
 156         assert(w == &cli->ev_timeout);
 157
 158         ev_timer_start(loop, &cli->ev_goodbye);
 159 }
 160
 161 static void goodbye_cb(struct ev_loop *loop, struct ev_timer *w, int revents) {
 162         struct client *cli = (struct client *) w->data;
 163         assert(w == &cli->ev_goodbye);
 164
 165         ev_io_stop(loop, &cli->ev_read);
 166         ev_io_stop(loop, &cli->ev_write);
 167         ev_timer_stop(loop, &cli->ev_timeout);
 168
 169         close(cli->fd);
 170         free(cli);
 171 }
 172
 173 static void write_cb(struct ev_loop *loop, struct ev_io *w, int revents)
 174 {
 175         struct client *cli = (struct client *) w->data;
 176
 177         if (EV_ERROR & revents) {
 178                 ev_timer_start(loop, &cli->ev_goodbye);
 179                 return;
 180         }
 181
 182         if (revents & EV_WRITE) {
 183                 if (cli->rbuff) {
 184                         write(cli->fd, cli->rbuff, cli->rlen);
 185                         free(cli->rbuff);
 186                 }
 187                 ev_io_stop(EV_A_ w);
 188         }
 189
 190         if (cli->close == 1 || timeout == 0.0) {
 191                 ev_timer_start(loop, &cli->ev_goodbye);
 192         } else {
 193                 ev_timer_again(loop, &cli->ev_timeout);
 194                 ev_io_start(loop, &cli->ev_read);
 195         }
 196 }
 197
 198 static inline void* execute_php(void *_cli) {
 199         int result;
 200         struct client *cli = (struct client *) _cli;
 201         zval retval;
 202         zval *headers[1];
 203         MAKE_STD_ZVAL(headers[0]);
 204         array_init(headers[0]);
 205
 206         cli->rbuff[cli->rlen] = '\0';
 207
 208         http_parser_init(&parser);
 209         parser.http_field = &http_field_cb;
 210         parser.on_element = &http_on_element;
 211         parser.data       = headers[0];
 212         http_parser_execute(&parser, cli->rbuff, cli->rlen, 0);
 213
 214         result = call_user_function(EG(function_table), NULL, callback->func, &retval, 1, headers TSRMLS_CC);
 215         free(cli->rbuff);
 216         cli->rbuff = NULL;
 217         cli->rlen  = 0;
 218
 219         zval_dtor(headers[0]); /* Free's the object contents */
 220         FREE_ZVAL(headers[0]); /* Free's the object itself */
 221
 222         if (result == SUCCESS) {
 223                 if (Z_TYPE_P(&retval) == IS_STRING) {
 224                         cli->rlen  = 256 + Z_STRLEN_P(&retval);
 225                         cli->rbuff = (char *) malloc(cli->rlen * sizeof(char));
 226                         cli->rlen  = snprintf(cli->rbuff, (cli->rlen - 1), "HTTP/1.1 200 OK\r\nConnection: %s\r\nContent-Type: text/plain\r\nServer: mistral/0.1\r\nContent-Length: %u\r\n\r\n%s",
 227                                         (timeout == 0.0 ? "close" : "keep-alive"), Z_STRLEN_P(&retval), Z_STRVAL_P(&retval));
 228
 229                 } else if (Z_TYPE_P(&retval) == IS_ARRAY) {
 230                         HashTable *arr_hash = Z_ARRVAL_P(&retval);
 231                         HashPosition pointer;
 232                         zval **data;
 233                         int header_len = 11; /* HTTP/1.1 \r\n */
 234                         int body_len = 0;
 235                         int status_len = 0;
 236                         char *status_code = NULL;
 237                         char *body = NULL;
 238                         char *test;
 239
 240                         for (zend_hash_internal_pointer_reset_ex(arr_hash, &pointer);
 241                                         zend_hash_get_current_data_ex(arr_hash, (void**) &data, &pointer) == SUCCESS;
 242                                         zend_hash_move_forward_ex(arr_hash, &pointer)) {
 243                                 char *key;
 244                                 int key_len;
 245                                 long index;
 246
 247                                 if (zend_hash_get_current_key_ex(arr_hash, &key, &key_len, &index, 0, &pointer) == HASH_KEY_IS_STRING) {
 248                                         zval temp = **data;
 249                                         zval_copy_ctor(&temp);
 250                                         convert_to_string(&temp);
 251
 252                                         if (Z_STRLEN(temp) > 0) {
 253                                                 if (php_strcmp("status_code", key, key_len - 1)) {
 254                                                         status_code = strdup(Z_STRVAL(temp));
 255                                                         status_len += Z_STRLEN(temp);
 256                                                 } else if (php_strcmp("body", key, key_len - 1)) {
 257                                                         body_len += Z_STRLEN(temp);
 258                                                 } else { /* So it is a header */
 259                                                         header_len += key_len - 1;
 260                                                         header_len += 4; /* : \r\n */
 261                                                         header_len += Z_STRLEN(temp);
 262
 263                                                         if (php_strcasecmp("Connection", key, key_len - 1) && php_strcasecmp("close", Z_STRVAL(temp), Z_STRLEN(temp))) {
 264                                                                 cli->close = 1;
 265                                                         }
 266                                                 }
 267                                         }
 268                                         zval_dtor(&temp);
 269                                 }
 270                         }
 271
 272                         cli->rlen  = (header_len + (status_len == 0 ? 8 : status_len + 2) + body_len);
 273                         cli->rbuff = (char *) malloc(cli->rlen * sizeof(char));
 274                         test = cli->rbuff;
 275
 276                         if (status_len == 0) {
 277                                 strncpy(test, "HTTP/1.1 200 OK\r\n", 17);
 278                                 test += 17;
 279                         } else {
 280                                 strncpy(test, "HTTP/1.1 ", 9);
 281                                 test += 9;
 282                                 strncpy(test, status_code, status_len);
 283                                 test += status_len;
 284                                 strncpy(test, "\r\n", 2);
 285                                 test += 2;
 286                                 free(status_code);
 287                         }
 288
 289                         for (zend_hash_internal_pointer_reset_ex(arr_hash, &pointer);
 290                                         zend_hash_get_current_data_ex(arr_hash, (void**) &data, &pointer) == SUCCESS;
 291                                         zend_hash_move_forward_ex(arr_hash, &pointer)) {
 292                                 char *key;
 293                                 int key_len;
 294                                 long index;
 295
 296                                 if (zend_hash_get_current_key_ex(arr_hash, &key, &key_len, &index, 0, &pointer) == HASH_KEY_IS_STRING) {
 297                                         zval temp = **data;
 298                                         zval_copy_ctor(&temp);
 299                                         convert_to_string(&temp);
 300
 301                                         if (Z_STRLEN(temp) > 0) {
 302                                                 if (status_len > 0 && php_strcmp("status_code", key, key_len - 1)) {
 303                                                         /* do nothing */
 304                                                 } else if (body_len > 0 && php_strcmp("body", key, key_len - 1)) {
 305                                                         body = strdup(Z_STRVAL(temp));
 306                                                 } else { /* So it is a header */
 307                                                         strncpy(test, key, key_len - 1);
 308                                                         test += key_len - 1;
 309                                                         strncpy(test, ": ", 2);
 310                                                         test += 2;
 311                                                         strncpy(test, Z_STRVAL(temp), Z_STRLEN(temp));
 312                                                         test += Z_STRLEN(temp);
 313                                                         strncpy(test, "\r\n", 2);
 314                                                         test += 2;
 315                                                 }
 316                                         }
 317                                         zval_dtor(&temp);
 318                                 }
 319                         }
 320
 321                         strncpy(test, "\r\n", 2);
 322                         test += 2;
 323
 324                         if (body) {
 325                                 strncpy(test, body, body_len);
 326                                 free(body);
 327                                 test += body_len;
 328                         }
 329                 }
 330
 331                 ev_io_start(cli->loop,&cli->ev_write);
 332         }
 333
 334         zval_dtor(&retval);
 335
 336         if (result != SUCCESS) {
 337                 ev_timer_start(cli->loop, &cli->ev_goodbye);
 338         }
 339 }
 340
 341 static void read_cb(struct ev_loop *loop, struct ev_io *w, int revents)
 342 {
 343         if ((revents & EV_READ) && callback) {
 344                 struct client *cli = (struct client *) w->data;
 345                 cli->rbuff = malloc(1024);
 346                 if (cli->rbuff) {
 347                         cli->rlen = read(cli->fd,cli->rbuff,1023);
 348                         if (cli->rlen > 0) {
 349                                 ev_io_stop(EV_A_ w);
 350                                 cli->loop = loop;
 351                                 execute_php(cli);
 352                                 return;
 353                         } else {
 354                                 free(cli->rbuff);
 355                                 cli->rbuff = NULL;
 356                                 cli->rlen  = 0;
 357                         }
 358                 }
 359         }
 360
 361         struct client *cli = (struct client *) w->data;
 362         ev_io_stop(EV_A_ w);
 363         ev_timer_start(loop, &cli->ev_goodbye);
 364 }
 365
 366 static void accept_cb(struct ev_loop *loop, struct ev_io *w, int revents)
 367 {
 368         int client_fd;
 369         struct client *cli;
 370         struct sockaddr_in client_addr;
 371         socklen_t client_len = sizeof(client_addr);
 372         client_fd = accept(w->fd, (struct sockaddr *)&client_addr, &client_len);
 373         if (client_fd == -1)
 374                 return;
 375
 376         cli = calloc(1,sizeof(struct client));
 377         cli->rbuff = NULL;
 378         cli->rlen  = 0;
 379         cli->fd = client_fd;
 380         if (setnonblock(cli->fd) < 0)
 381                 err(1, "failed to set client socket to non-blocking");
 382
 383         ev_io_init(&cli->ev_read, read_cb, cli->fd, EV_READ);
 384         cli->ev_read.data    = cli;
 385
 386         ev_io_init(&cli->ev_write, write_cb, cli->fd, EV_WRITE);
 387         cli->ev_write.data   = cli;
 388
 389         ev_timer_init(&cli->ev_goodbye, goodbye_cb, 0., 0.);
 390         cli->ev_goodbye.data = cli;
 391
 392         ev_timer_init(&cli->ev_timeout, timeout_cb, 0., (timeout == 0.0 ? 30.0 : timeout));
 393         cli->ev_timeout.data = cli;
 394
 395         ev_io_start(loop,&cli->ev_read);
 396 }
 397
 398 /* {{{ mistral_functions[] */
 399 zend_function_entry mistral_functions[] = {
 400         PHP_FE(mistral_init, NULL)
 401                 PHP_FE(mistral_register_callback, NULL)
 402                 PHP_FE(mistral_start, NULL)
 403                 { NULL, NULL, NULL }
 404 };
 405 /* }}} */
 406
 407 /* {{{ mistral_module_entry
 408  * */
 409 zend_module_entry mistral_module_entry = {
 410         STANDARD_MODULE_HEADER,
 411         "mistral",
 412         mistral_functions,
 413         NULL,                 /* Replace with NULL if there is nothing to do at php startup   */
 414         PHP_MSHUTDOWN(mistral),
 415         NULL,                 /* Replace with NULL if there is nothing to do at request start */
 416         NULL,                 /* Replace with NULL if there is nothing to do at request end   */
 417         PHP_MINFO(mistral),
 418         PHP_MISTRAL_VERSION,
 419         STANDARD_MODULE_PROPERTIES
 420 };
 421 /* }}} */
 422
 423 #ifdef COMPILE_DL_MISTRAL
 424 ZEND_GET_MODULE(mistral)
 425 #endif
 426
 427 /* {{{ PHP_MINFO_FUNCTION */
 428 PHP_MINFO_FUNCTION(mistral)
 429 {
 430         php_info_print_table_start();
 431         php_info_print_table_header(2, "Mistral support", "enabled");
 432         php_info_print_table_row(2, "Version",  PHP_MISTRAL_VERSION);
 433         php_info_print_table_end();
 434 }
 435 /* }}} */
 436
 437 /* {{{ PHP_MSHUTDOWN_FUNCTION */
 438 PHP_MSHUTDOWN_FUNCTION (mistral)
 439 {
 440         _php_event_callback_free(callback);
 441 }
 442 /* }}} */
 443
 444 PHP_FUNCTION(mistral_init)
 445 {
 446         struct addrinfo *ai = NULL;
 447         struct addrinfo hints;
 448         struct addrinfo *runp;
 449         int listen_sock = -1;
 450
 451         char *listen_addr;
 452         int   listen_addr_len;
 453         long  listen_port;
 454
 455         struct sockaddr_storage sin;
 456         struct sockaddr_in * sa4 = (struct sockaddr_in *) &sin;
 457         struct sockaddr_in6 * sa6 = (struct sockaddr_in6 *) &sin;
 458
 459         int reuseaddr_on = 1;
 460         int keepalive_on = 1;
 461
 462         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sld", &listen_addr, &listen_addr_len, &listen_port, &timeout) == FAILURE) {
 463                 RETURN_NULL();
 464         }
 465
 466         if (listen_port < 1 || listen_port > 65535) {
 467                 RETURN_NULL();
 468         }
 469
 470         bzero(&hints, sizeof (hints));
 471         hints.ai_flags = AI_ADDRCONFIG || AI_NUMERICSERV;
 472         hints.ai_socktype = SOCK_STREAM;
 473
 474         if (getaddrinfo(listen_addr, "", &hints, &ai) != 0) {
 475                 RETURN_NULL();
 476         }
 477
 478         runp = ai;
 479
 480         while (runp != NULL && listen_sock < 0) {
 481                 listen_sock = socket(runp->ai_family, SOCK_STREAM, 0);
 482                 if (listen_sock < 0)
 483                         runp = runp->ai_next;
 484         }
 485
 486         if (listen_sock < 0) {
 487                 err(1, "listen failed");
 488         }
 489
 490         if (timeout <= 0.0) {
 491                 timeout = 0.0;
 492         } else {
 493                 if (setsockopt(listen_sock, SOL_SOCKET, SO_KEEPALIVE, &keepalive_on, sizeof(keepalive_on)) == -1)
 494                         err(1, "setsockopt failed");
 495         }
 496
 497         if (setsockopt(listen_sock, SOL_SOCKET, SO_REUSEADDR, &reuseaddr_on, sizeof(reuseaddr_on)) == -1)
 498                 err(1, "setsockopt failed");
 499
 500         if (runp->ai_family == AF_INET6) {
 501                 int null = 0;
 502                 setsockopt(listen_sock, IPPROTO_IPV6, IPV6_V6ONLY, &null, sizeof(null));
 503         }
 504
 505         memset(&sin, 0, sizeof(sin));
 506
 507         sin.ss_family = runp->ai_family;
 508         switch (sin.ss_family) {
 509                 case AF_INET6:
 510                         inet_pton(sin.ss_family, listen_addr, &(sa6->sin6_addr));
 511                         sa6->sin6_port = htons(listen_port);
 512                         break;
 513                 case AF_INET:
 514                         if ( strchr(listen_addr, ':') )
 515                                 /* Invalid IPv4-string. Use the wildcard address. */
 516                                 listen_addr = strdup("0.0.0.0");
 517
 518                         inet_pton(sin.ss_family, listen_addr, &(sa4->sin_addr));
 519                         sa4->sin_port = htons(listen_port);
 520         }
 521
 522         if (ai)
 523                 freeaddrinfo(ai);
 524
 525         if (bind(listen_sock, (struct sockaddr *) &sin, sizeof(sin)) < 0)
 526                 err(1, "bind failed");
 527
 528         if (listen(listen_sock, 5) < 0)
 529                 err(1, "listen failed");
 530
 531         if (setnonblock(listen_sock) < 0)
 532                 err(1, "failed to set server socket to non-blocking");
 533
 534         ev_io_init(&ev_accept, accept_cb, listen_sock, EV_READ);
 535 }
 536
 537 /* {{{ proto bool event_set(resource event, resource fd, int events, mixed callback[, mixed arg])
 538  * Taken from pecl::libevent event_set
 539  */
 540 PHP_FUNCTION(mistral_register_callback)
 541 {
 542         zval *zcallback, *zarg = NULL;
 543         php_event_callback_t *new_callback, *old_callback;
 544         char *func_name;
 545
 546         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zcallback) != SUCCESS) {
 547                 return;
 548         }
 549
 550         if (!zend_is_callable(zcallback, 0, &func_name TSRMLS_CC)) {
 551                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "'%s' is not a valid callback", func_name);
 552                 efree(func_name);
 553                 RETURN_FALSE;
 554         }
 555         efree(func_name);
 556
 557         zval_add_ref(&zcallback);
 558
 559         new_callback = emalloc(sizeof(php_event_callback_t));
 560         new_callback->func = zcallback;
 561         new_callback->arg = zarg;
 562
 563         old_callback = callback;
 564         callback = new_callback;
 565
 566         if (old_callback) {
 567                 _php_event_callback_free(old_callback);
 568         }
 569
 570         RETURN_TRUE;
 571 }
 572 /* }}} */
 573
 574 PHP_FUNCTION(mistral_start)
 575 {
 576         struct ev_loop *loop = ev_default_loop(0);
 577
 578         ev_io_start(loop, &ev_accept);
 579         ev_loop(loop, 0);
 580 }