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         int done;
  46
  47         int close;
  48 };
  49
  50 ev_io ev_accept;
  51 double timeout = 300;
  52
  53 typedef struct _php_event_callback_t { /* {{{ */
  54         zval *func;
  55         zval *arg;
  56 } php_event_callback_t;
  57 /* }}} */
  58
  59 php_event_callback_t *callback = NULL;
  60
  61 http_parser parser;
  62
  63 void http_field_cb(void *data, const char *field, size_t flen, const char *value, size_t vlen) {
  64         zval *server_vars = (zval *)data;
  65         char *fld = malloc(5 + flen + 1);
  66         char *val = strndup(value, vlen);
  67         size_t i;
  68
  69         memcpy(fld, "HTTP_", 5);
  70         for (i = 0; i < flen; i++) {
  71                 if (field[i] == '-')
  72                         fld[5+i] = '_';
  73                 else
  74                         fld[5+i] = toupper(field[i]);
  75         }
  76         fld[5+flen] = '\0';
  77
  78         add_assoc_string(server_vars, (char *)fld, (char *)val, 1);
  79         free(fld);
  80         free(val);
  81 }
  82
  83 void http_on_element(void *data, int type, const char *at, size_t length) {
  84         char *line, *val;
  85         zval *server_vars = (zval *)data;
  86
  87         switch( type ) {
  88                 case MONGREL_CONTENT_LENGTH:
  89                         line = "CONTENT_LENGTH";
  90                         break;
  91
  92                 case MONGREL_CONTENT_TYPE:
  93                         line = "CONTENT_TYPE";
  94                         break;
  95
  96                 case MONGREL_FRAGMENT:
  97                         line = "FRAGMENT";
  98                         break;
  99
 100                 case MONGREL_HTTP_VERSION:
 101                         line = "HTTP_VERSION";
 102                         break;
 103
 104                 case MONGREL_QUERY_STRING:
 105                         line = "QUERY_STRING";
 106                         break;
 107
 108                 case MONGREL_REQUEST_PATH:
 109                         line = "REQUEST_PATH";
 110                         break;
 111
 112                 case MONGREL_REQUEST_METHOD:
 113                         line = "REQUEST_METHOD";
 114                         break;
 115
 116                 case MONGREL_REQUEST_URI:
 117                         line = "REQUEST_URI";
 118                         break;
 119
 120                 default:
 121                         line = "UNKNOWN";
 122         }
 123
 124         val = strndup(at, length);
 125         add_assoc_string(server_vars, (char *) line, (char *) val, 1);
 126         free(val);
 127 }
 128
 129 static int setnonblock(int fd)
 130 {
 131         int flags;
 132
 133         flags = fcntl(fd, F_GETFL);
 134         if (flags < 0)
 135                 return flags;
 136         flags |= O_NONBLOCK;
 137         if (fcntl(fd, F_SETFL, flags) < 0)
 138                 return -1;
 139
 140         return 0;
 141 }
 142
 143 static inline void _php_event_callback_free(php_event_callback_t *this_callback) /* {{{ */
 144 {
 145         if (!this_callback)
 146                 return;
 147
 148         zval_ptr_dtor(&this_callback->func);
 149         if (this_callback->arg)
 150                 zval_ptr_dtor(&this_callback->arg);
 151
 152         efree(this_callback);
 153 }
 154
 155 static void timeout_cb(struct ev_loop *loop, struct ev_timer *w, int revents) {
 156         struct client *cli = (struct client *) w->data;
 157         assert(w == &cli->ev_timeout);
 158
 159         ev_timer_start(loop, &cli->ev_goodbye);
 160 }
 161
 162 static void goodbye_cb(struct ev_loop *loop, struct ev_timer *w, int revents) {
 163         struct client *cli = (struct client *) w->data;
 164         assert(w == &cli->ev_goodbye);
 165
 166         ev_io_stop(loop, &cli->ev_read);
 167         ev_io_stop(loop, &cli->ev_write);
 168         ev_timer_stop(loop, &cli->ev_timeout);
 169
 170         shutdown(cli->fd, SHUT_WR);
 171
 172         close(cli->fd);
 173         free(cli);
 174 }
 175
 176 static void write_cb(struct ev_loop *loop, struct ev_io *w, int revents)
 177 {
 178         struct client *cli = (struct client *) w->data;
 179
 180         if (EV_ERROR & revents) {
 181                 ev_timer_start(loop, &cli->ev_goodbye);
 182                 return;
 183         }
 184
 185         if (revents & EV_WRITE) {
 186                 if (cli->rbuff) {
 187                         cli->done += write(cli->fd, cli->rbuff + cli->done, cli->rlen - cli->done);
 188                         if (cli->done == cli->rlen) {
 189                                 free(cli->rbuff);
 190                                 cli->rbuff = NULL;
 191                                 cli->rlen = 0;
 192                         }
 193                 }
 194                 ev_io_stop(EV_A_ w);
 195         }
 196
 197         if ((cli->rlen == 0 && cli->close == 1) || timeout == 0.0) {
 198                 ev_timer_start(loop, &cli->ev_goodbye);
 199         } else {
 200                 ev_timer_again(loop, &cli->ev_timeout);
 201                 ev_io_start(loop, &cli->ev_read);
 202                 if (cli->done < cli->rlen)
 203                         ev_io_start(loop, &cli->ev_write);
 204         }
 205 }
 206
 207 static inline void* execute_php(void *_cli) {
 208         int result;
 209         struct client *cli = (struct client *) _cli;
 210         zval retval;
 211         zval *headers[1];
 212         MAKE_STD_ZVAL(headers[0]);
 213         array_init(headers[0]);
 214
 215                 cli->done = 0;
 216         cli->rbuff[cli->rlen] = '\0';
 217
 218         http_parser_init(&parser);
 219         parser.http_field = &http_field_cb;
 220         parser.on_element = &http_on_element;
 221         parser.data       = headers[0];
 222         http_parser_execute(&parser, cli->rbuff, cli->rlen, 0);
 223
 224         result = call_user_function(EG(function_table), NULL, callback->func, &retval, 1, headers TSRMLS_CC);
 225         free(cli->rbuff);
 226         cli->rbuff = NULL;
 227         cli->rlen  = 0;
 228
 229         zval_dtor(headers[0]); /* Free's the object contents */
 230         FREE_ZVAL(headers[0]); /* Free's the object itself */
 231
 232         if (result == SUCCESS) {
 233                 if (Z_TYPE_P(&retval) == IS_STRING) {
 234                         cli->rlen  = 256 + Z_STRLEN_P(&retval);
 235                         cli->rbuff = (char *) malloc(cli->rlen * sizeof(char));
 236                         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",
 237                                         (timeout == 0.0 ? "close" : "keep-alive"), Z_STRLEN_P(&retval), Z_STRVAL_P(&retval));
 238
 239                 } else if (Z_TYPE_P(&retval) == IS_ARRAY) {
 240                         HashTable *arr_hash = Z_ARRVAL_P(&retval);
 241                         HashPosition pointer;
 242                         zval **data;
 243                         int header_len = 11; /* HTTP/1.1 \r\n */
 244                         int body_len = 0;
 245                         int status_len = 0;
 246                         char *status_code = NULL;
 247                         char *body = NULL;
 248                         char *test;
 249
 250                         for (zend_hash_internal_pointer_reset_ex(arr_hash, &pointer);
 251                                         zend_hash_get_current_data_ex(arr_hash, (void**) &data, &pointer) == SUCCESS;
 252                                         zend_hash_move_forward_ex(arr_hash, &pointer)) {
 253                                 char *key;
 254                                 int key_len;
 255                                 long index;
 256
 257                                 if (zend_hash_get_current_key_ex(arr_hash, &key, &key_len, &index, 0, &pointer) == HASH_KEY_IS_STRING) {
 258                                         zval temp = **data;
 259                                         zval_copy_ctor(&temp);
 260                                         convert_to_string(&temp);
 261
 262                                         if (Z_STRLEN(temp) > 0) {
 263                                                 if (php_strcmp("status_code", key, key_len - 1)) {
 264                                                         status_code = strndup(Z_STRVAL(temp), Z_STRLEN(temp));
 265                                                         status_len += Z_STRLEN(temp);
 266                                                 } else if (php_strcmp("body", key, key_len - 1)) {
 267                                                         body_len += Z_STRLEN(temp);
 268                                                 } else { /* So it is a header */
 269                                                         header_len += key_len - 1;
 270                                                         header_len += 4; /* : \r\n */
 271                                                         header_len += Z_STRLEN(temp);
 272
 273                                                         if (php_strcasecmp("Connection", key, key_len - 1) && php_strcasecmp("close", Z_STRVAL(temp), Z_STRLEN(temp))) {
 274                                                                 cli->close = 1;
 275                                                         }
 276                                                 }
 277                                         }
 278                                         zval_dtor(&temp);
 279                                 }
 280                         }
 281
 282                         cli->rlen  = (header_len + (status_len == 0 ? 8 : status_len + 2) + body_len);
 283                         cli->rbuff = (char *) malloc(cli->rlen * sizeof(char));
 284                         test = cli->rbuff;
 285
 286                         if (status_len == 0) {
 287                                 memcpy(test, "HTTP/1.1 200 OK\r\n", 17);
 288                                 test += 17;
 289                         } else {
 290                                 memcpy(test, "HTTP/1.1 ", 9);
 291                                 test += 9;
 292
 293                                 memcpy(test, status_code, status_len);
 294                                 test += status_len;
 295
 296                                 memcpy(test, "\r\n", 2);
 297                                 test += 2;
 298                                 free(status_code);
 299                         }
 300
 301                         for (zend_hash_internal_pointer_reset_ex(arr_hash, &pointer);
 302                                         zend_hash_get_current_data_ex(arr_hash, (void**) &data, &pointer) == SUCCESS;
 303                                         zend_hash_move_forward_ex(arr_hash, &pointer)) {
 304                                 char *key;
 305                                 int key_len;
 306                                 long index;
 307
 308                                 if (zend_hash_get_current_key_ex(arr_hash, &key, &key_len, &index, 0, &pointer) == HASH_KEY_IS_STRING) {
 309                                         zval temp = **data;
 310                                         zval_copy_ctor(&temp);
 311                                         convert_to_string(&temp);
 312
 313                                         if (Z_STRLEN(temp) > 0) {
 314                                                 if (status_len > 0 && php_strcmp("status_code", key, key_len - 1)) {
 315                                                         /* do nothing */
 316                                                 } else if (body_len > 0 && php_strcmp("body", key, key_len - 1)) {
 317                                                         body = malloc(Z_STRLEN(temp) * sizeof(char));
 318                                                         memcpy(body, Z_STRVAL(temp), Z_STRLEN(temp));
 319                                                 } else { /* So it is a header */
 320                                                         memcpy(test, key, key_len - 1);
 321                                                         test += (key_len - 1);
 322
 323                                                         memcpy(test, ": ", 2);
 324                                                         test += 2;
 325
 326                                                         memcpy(test, Z_STRVAL(temp), Z_STRLEN(temp));
 327                                                         test += Z_STRLEN(temp);
 328
 329                                                         memcpy(test, "\r\n", 2);
 330                                                         test += 2;
 331                                                 }
 332                                         }
 333                                         zval_dtor(&temp);
 334                                 }
 335                         }
 336
 337                         memcpy(test, "\r\n", 2);
 338                         test += 2;
 339
 340                         if (body) {
 341                                 memcpy(test, body, body_len);
 342                                 free(body);
 343                                 test += body_len;
 344                         }
 345                 }
 346
 347                 ev_io_start(cli->loop,&cli->ev_write);
 348         }
 349
 350         zval_dtor(&retval);
 351
 352         if (result != SUCCESS) {
 353                 ev_timer_start(cli->loop, &cli->ev_goodbye);
 354         }
 355 }
 356
 357 static void read_cb(struct ev_loop *loop, struct ev_io *w, int revents)
 358 {
 359         if ((revents & EV_READ) && callback) {
 360                 struct client *cli = (struct client *) w->data;
 361                 cli->rbuff = malloc(1024);
 362                 if (cli->rbuff) {
 363                         cli->rlen = read(cli->fd,cli->rbuff,1023);
 364                         if (cli->rlen > 0) {
 365                                 ev_io_stop(EV_A_ w);
 366                                 cli->loop = loop;
 367                                 execute_php(cli);
 368                                 return;
 369                         } else {
 370                                 free(cli->rbuff);
 371                                 cli->rbuff = NULL;
 372                                 cli->rlen  = 0;
 373                         }
 374                 }
 375         }
 376
 377         struct client *cli = (struct client *) w->data;
 378         ev_io_stop(EV_A_ w);
 379         ev_timer_start(loop, &cli->ev_goodbye);
 380 }
 381
 382 static void accept_cb(struct ev_loop *loop, struct ev_io *w, int revents)
 383 {
 384         int client_fd;
 385         struct client *cli;
 386         struct sockaddr_in client_addr;
 387         socklen_t client_len = sizeof(client_addr);
 388         client_fd = accept(w->fd, (struct sockaddr *)&client_addr, &client_len);
 389         if (client_fd == -1)
 390                 return;
 391
 392         cli = calloc(1,sizeof(struct client));
 393         cli->rbuff = NULL;
 394         cli->rlen  = 0;
 395         cli->fd = client_fd;
 396         if (setnonblock(cli->fd) < 0)
 397                 err(1, "failed to set client socket to non-blocking");
 398
 399         ev_io_init(&cli->ev_read, read_cb, cli->fd, EV_READ);
 400         cli->ev_read.data    = cli;
 401
 402         ev_io_init(&cli->ev_write, write_cb, cli->fd, EV_WRITE);
 403         cli->ev_write.data   = cli;
 404
 405         ev_timer_init(&cli->ev_goodbye, goodbye_cb, 0., 0.);
 406         cli->ev_goodbye.data = cli;
 407
 408         ev_timer_init(&cli->ev_timeout, timeout_cb, 0., (timeout == 0.0 ? 30.0 : timeout));
 409         cli->ev_timeout.data = cli;
 410
 411         ev_io_start(loop,&cli->ev_read);
 412 }
 413
 414 /* {{{ mistral_functions[] */
 415 zend_function_entry mistral_functions[] = {
 416         PHP_FE(mistral_init, NULL)
 417                 PHP_FE(mistral_register_callback, NULL)
 418                 PHP_FE(mistral_start, NULL)
 419                 { NULL, NULL, NULL }
 420 };
 421 /* }}} */
 422
 423 /* {{{ mistral_module_entry
 424  * */
 425 zend_module_entry mistral_module_entry = {
 426         STANDARD_MODULE_HEADER,
 427         "mistral",
 428         mistral_functions,
 429         NULL,                 /* Replace with NULL if there is nothing to do at php startup   */
 430         PHP_MSHUTDOWN(mistral),
 431         NULL,                 /* Replace with NULL if there is nothing to do at request start */
 432         NULL,                 /* Replace with NULL if there is nothing to do at request end   */
 433         PHP_MINFO(mistral),
 434         PHP_MISTRAL_VERSION,
 435         STANDARD_MODULE_PROPERTIES
 436 };
 437 /* }}} */
 438
 439 #ifdef COMPILE_DL_MISTRAL
 440 ZEND_GET_MODULE(mistral)
 441 #endif
 442
 443 /* {{{ PHP_MINFO_FUNCTION */
 444 PHP_MINFO_FUNCTION(mistral)
 445 {
 446         php_info_print_table_start();
 447         php_info_print_table_header(2, "Mistral support", "enabled");
 448         php_info_print_table_row(2, "Version",  PHP_MISTRAL_VERSION);
 449         php_info_print_table_end();
 450 }
 451 /* }}} */
 452
 453 /* {{{ PHP_MSHUTDOWN_FUNCTION */
 454 PHP_MSHUTDOWN_FUNCTION (mistral)
 455 {
 456         _php_event_callback_free(callback);
 457 }
 458 /* }}} */
 459
 460 PHP_FUNCTION(mistral_init)
 461 {
 462         struct addrinfo *ai = NULL;
 463         struct addrinfo hints;
 464         struct addrinfo *runp;
 465         int listen_sock = -1;
 466
 467         char *listen_addr;
 468         int   listen_addr_len;
 469         long  listen_port;
 470
 471         struct sockaddr_storage sin;
 472         struct sockaddr_in * sa4 = (struct sockaddr_in *) &sin;
 473         struct sockaddr_in6 * sa6 = (struct sockaddr_in6 *) &sin;
 474
 475         int reuseaddr_on = 1;
 476         int keepalive_on = 1;
 477
 478         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sld", &listen_addr, &listen_addr_len, &listen_port, &timeout) == FAILURE) {
 479                 RETURN_NULL();
 480         }
 481
 482         if (listen_port < 1 || listen_port > 65535) {
 483                 RETURN_NULL();
 484         }
 485
 486         bzero(&hints, sizeof (hints));
 487         hints.ai_flags = AI_ADDRCONFIG || AI_NUMERICSERV;
 488         hints.ai_socktype = SOCK_STREAM;
 489
 490         if (getaddrinfo(listen_addr, "", &hints, &ai) != 0) {
 491                 RETURN_NULL();
 492         }
 493
 494         runp = ai;
 495
 496         while (runp != NULL && listen_sock < 0) {
 497                 listen_sock = socket(runp->ai_family, SOCK_STREAM, 0);
 498                 if (listen_sock < 0)
 499                         runp = runp->ai_next;
 500         }
 501
 502         if (listen_sock < 0) {
 503                 err(1, "listen failed");
 504         }
 505
 506         if (timeout <= 0.0) {
 507                 timeout = 0.0;
 508         } else {
 509                 if (setsockopt(listen_sock, SOL_SOCKET, SO_KEEPALIVE, &keepalive_on, sizeof(keepalive_on)) == -1)
 510                         err(1, "setsockopt failed");
 511         }
 512
 513         if (setsockopt(listen_sock, SOL_SOCKET, SO_REUSEADDR, &reuseaddr_on, sizeof(reuseaddr_on)) == -1)
 514                 err(1, "setsockopt failed");
 515
 516         if (runp->ai_family == AF_INET6) {
 517                 int null = 0;
 518                 setsockopt(listen_sock, IPPROTO_IPV6, IPV6_V6ONLY, &null, sizeof(null));
 519         }
 520
 521         memset(&sin, 0, sizeof(sin));
 522
 523         sin.ss_family = runp->ai_family;
 524         switch (sin.ss_family) {
 525                 case AF_INET6:
 526                         inet_pton(sin.ss_family, listen_addr, &(sa6->sin6_addr));
 527                         sa6->sin6_port = htons(listen_port);
 528                         break;
 529                 case AF_INET:
 530                         if ( strchr(listen_addr, ':') )
 531                                 /* Invalid IPv4-string. Use the wildcard address. */
 532                                 listen_addr = strndup("0.0.0.0", 7);
 533
 534                         inet_pton(sin.ss_family, listen_addr, &(sa4->sin_addr));
 535                         sa4->sin_port = htons(listen_port);
 536         }
 537
 538         if (ai)
 539                 freeaddrinfo(ai);
 540
 541         if (bind(listen_sock, (struct sockaddr *) &sin, sizeof(sin)) < 0)
 542                 err(1, "bind failed");
 543
 544         if (listen(listen_sock, 5) < 0)
 545                 err(1, "listen failed");
 546
 547         if (setnonblock(listen_sock) < 0)
 548                 err(1, "failed to set server socket to non-blocking");
 549
 550         ev_io_init(&ev_accept, accept_cb, listen_sock, EV_READ);
 551 }
 552
 553 /* {{{ proto bool event_set(resource event, resource fd, int events, mixed callback[, mixed arg])
 554  * Taken from pecl::libevent event_set
 555  */
 556 PHP_FUNCTION(mistral_register_callback)
 557 {
 558         zval *zcallback, *zarg = NULL;
 559         php_event_callback_t *new_callback, *old_callback;
 560         char *func_name;
 561
 562         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zcallback) != SUCCESS) {
 563                 return;
 564         }
 565
 566         if (!zend_is_callable(zcallback, 0, &func_name TSRMLS_CC)) {
 567                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "'%s' is not a valid callback", func_name);
 568                 efree(func_name);
 569                 RETURN_FALSE;
 570         }
 571         efree(func_name);
 572
 573         zval_add_ref(&zcallback);
 574
 575         new_callback = emalloc(sizeof(php_event_callback_t));
 576         new_callback->func = zcallback;
 577         new_callback->arg = zarg;
 578
 579         old_callback = callback;
 580         callback = new_callback;
 581
 582         if (old_callback) {
 583                 _php_event_callback_free(old_callback);
 584         }
 585
 586         RETURN_TRUE;
 587 }
 588 /* }}} */
 589
 590 PHP_FUNCTION(mistral_start)
 591 {
 592         struct ev_loop *loop = ev_default_loop(0);
 593
 594         ev_io_start(loop, &ev_accept);
 595         ev_loop(loop, 0);
 596 }