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