db_sockets.c 42 KB

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  1. /* -*- mode:c; c-file-style:"k&r"; c-basic-offset: 4; tab-width:4; indent-tabs-mode:nil; mode:auto-fill; fill-column:78; -*- */
  2. /* vim: set ts=4 sw=4 et tw=78 fo=cqt wm=0: */
  3. /* Copyright (C) 2014 Stony Brook University
  4. This file is part of Graphene Library OS.
  5. Graphene Library OS is free software: you can redistribute it and/or
  6. modify it under the terms of the GNU Lesser General Public License
  7. as published by the Free Software Foundation, either version 3 of the
  8. License, or (at your option) any later version.
  9. Graphene Library OS is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12. GNU Lesser General Public License for more details.
  13. You should have received a copy of the GNU Lesser General Public License
  14. along with this program. If not, see <http://www.gnu.org/licenses/>. */
  15. /*
  16. * db_socket.c
  17. *
  18. * This file contains operands for streams with URIs that start with
  19. * "tcp:", "tcp.srv:", "udp:", "udp.srv:".
  20. */
  21. #include "pal_defs.h"
  22. #include "pal_freebsd_defs.h"
  23. #include "pal.h"
  24. #include "pal_internal.h"
  25. #include "pal_freebsd.h"
  26. #include "pal_debug.h"
  27. #include "pal_security.h"
  28. #include "pal_error.h"
  29. #include "api.h"
  30. #include <sys/types.h>
  31. #include <poll.h>
  32. typedef __kernel_pid_t pid_t;
  33. #include <fcntl.h>
  34. #include <sys/socket.h>
  35. #include <netinet/in.h>
  36. #include <arpa/inet.h>
  37. #include <netinet/tcp.h>
  38. #include <errno.h>
  39. #include <sys/filio.h>
  40. /* 96 bytes is the minimal size of buffer to store a IPv4/IPv6
  41. address */
  42. #define PAL_SOCKADDR_SIZE 96
  43. typedef uint16_t __be16;
  44. #define SOL_TCP 6
  45. #define TCP_CORK TCP_NOPUSH
  46. static inline int addr_size (struct sockaddr * addr)
  47. {
  48. switch (addr->sa_family) {
  49. case AF_INET:
  50. return sizeof(struct sockaddr_in);
  51. case AF_INET6:
  52. return sizeof(struct sockaddr_in6);
  53. default:
  54. return 0;
  55. }
  56. }
  57. /* parsing the string of uri, and fill in the socket address structure.
  58. the latest pointer of uri, length of socket address are returned. */
  59. static int inet_parse_uri (char ** uri, struct sockaddr * addr, int * addrlen)
  60. {
  61. char * tmp = *uri, * end;
  62. char * addr_str = NULL, * port_str;
  63. int af;
  64. void * addr_buf;
  65. int addr_len;
  66. __be16 * port_buf;
  67. int slen;
  68. if (tmp[0] == '[') {
  69. /* for IPv6, the address will be in the form of
  70. "[xx:xx:xx:xx:xx:xx:xx:xx]:port". */
  71. struct sockaddr_in6 * addr_in6 = (struct sockaddr_in6 *) addr;
  72. slen = sizeof(struct sockaddr_in6);
  73. memset(addr, 0, slen);
  74. end = strchr(tmp + 1, ']');
  75. if (!end || *(end + 1) != ':')
  76. goto inval;
  77. addr_str = tmp + 1;
  78. addr_len = end - tmp + 1;
  79. port_str = end + 2;
  80. for (end = port_str ; *end >= '0' && *end <= '9' ; end++);
  81. addr_in6->sin6_family = af = AF_INET6;
  82. addr_buf = &addr_in6->sin6_addr.s6_addr;
  83. port_buf = &addr_in6->sin6_port;
  84. } else {
  85. /* for IP, the address will be in the form of "x.x.x.x:port". */
  86. struct sockaddr_in * addr_in = (struct sockaddr_in *) addr;
  87. slen = sizeof(struct sockaddr_in);
  88. memset(addr, 0, slen);
  89. end = strchr(tmp, ':');
  90. if (!end)
  91. goto inval;
  92. addr_str = tmp;
  93. addr_len = end - tmp;
  94. port_str = end + 1;
  95. for (end = port_str ; *end >= '0' && *end <= '9' ; end++);
  96. addr_in->sin_family = af = AF_INET;
  97. addr_buf = &addr_in->sin_addr.s_addr;
  98. port_buf = &addr_in->sin_port;
  99. }
  100. if (af == AF_INET) {
  101. if (inet_pton4(addr_str, addr_len, addr_buf) < 0)
  102. goto inval;
  103. } else {
  104. if (inet_pton6(addr_str, addr_len, addr_buf) < 0)
  105. goto inval;
  106. }
  107. *port_buf = __htons(atoi(port_str));
  108. *uri = *end ? end + 1 : NULL;
  109. if (addrlen)
  110. *addrlen = slen;
  111. return 0;
  112. inval:
  113. return -PAL_ERROR_INVAL;
  114. }
  115. /* create the string of uri from the given socket address */
  116. static int inet_create_uri (char * uri, int count, struct sockaddr * addr,
  117. int addrlen)
  118. {
  119. int len = 0;
  120. if (addr->sa_family == AF_INET) {
  121. if (addrlen != sizeof(struct sockaddr_in))
  122. return PAL_ERROR_INVAL;
  123. struct sockaddr_in * addr_in = (struct sockaddr_in *) addr;
  124. char * addr = (char *) &addr_in->sin_addr.s_addr;
  125. /* for IP, the address will be in the form of "x.x.x.x:port". */
  126. len = snprintf(uri, count, "%u.%u.%u.%u:%u",
  127. (unsigned char) addr[0],
  128. (unsigned char) addr[1],
  129. (unsigned char) addr[2],
  130. (unsigned char) addr[3],
  131. __ntohs(addr_in->sin_port));
  132. } else if (addr->sa_family == AF_INET6) {
  133. if (addrlen != sizeof(struct sockaddr_in6))
  134. return PAL_ERROR_INVAL;
  135. struct sockaddr_in6 * addr_in6 = (struct sockaddr_in6 *) addr;
  136. short * addr = (short *) &addr_in6->sin6_addr.s6_addr;
  137. /* for IPv6, the address will be in the form of
  138. "[xx:xx:xx:xx:xx:xx:xx:xx]:port". */
  139. len = snprintf(uri, count, "[%x:%x:%x:%x:%x:%x:%x:%x]:%u",
  140. addr[0], addr[1], addr[2], addr[3],
  141. addr[4], addr[5], addr[6], addr[7],
  142. __ntohs(addr_in6->sin6_port));
  143. } else {
  144. return -PAL_ERROR_INVAL;
  145. }
  146. return len;
  147. }
  148. /* parse the uri for a socket stream. The uri might have both binding
  149. address and connecting address, or connecting address only. The form
  150. of uri will be either "bind-addr:bind-port:connect-addr:connect-port"
  151. or "addr:port". */
  152. static int socket_parse_uri (char * uri,
  153. struct sockaddr ** bind_addr, int * bind_addrlen,
  154. struct sockaddr ** dest_addr, int * dest_addrlen)
  155. {
  156. int ret;
  157. if (!bind_addr && !dest_addr)
  158. return 0;
  159. if (!uri || !(*uri)) {
  160. if (bind_addr)
  161. *bind_addr = NULL;
  162. if (dest_addr)
  163. *dest_addr = NULL;
  164. return 0;
  165. }
  166. /* at least parse uri once */
  167. if ((ret = inet_parse_uri(&uri, bind_addr ? *bind_addr : *dest_addr,
  168. bind_addr ? bind_addrlen : dest_addrlen)) < 0)
  169. return ret;
  170. if (!(bind_addr && dest_addr))
  171. return 0;
  172. /* if you reach here, it can only be connection address */
  173. if (!uri || (ret = inet_parse_uri(&uri, *dest_addr, dest_addrlen)) < 0) {
  174. *dest_addr = *bind_addr;
  175. *dest_addrlen = *bind_addrlen;
  176. *bind_addr = NULL;
  177. *bind_addrlen = 0;
  178. }
  179. return 0;
  180. }
  181. /* fill in the PAL handle based on the file descriptors and address given. */
  182. static inline
  183. PAL_HANDLE socket_create_handle (int type, int fd, int options,
  184. struct sockaddr * bind_addr, int bind_addrlen,
  185. struct sockaddr * dest_addr, int dest_addrlen)
  186. {
  187. PAL_HANDLE hdl = malloc(HANDLE_SIZE(sock) + (bind_addr ? bind_addrlen : 0) +
  188. (dest_addr ? dest_addrlen : 0));
  189. if (!hdl)
  190. return NULL;
  191. options = HOST_SOCKET_OPTIONS(options);
  192. memset(hdl, 0, sizeof(union pal_handle));
  193. PAL_GET_TYPE(hdl) = type;
  194. hdl->__in.flags |= RFD(0)|(type != pal_type_tcpsrv ? WFD(0) : 0);
  195. hdl->sock.fd = fd;
  196. void * addr = (void *) hdl + HANDLE_SIZE(sock);
  197. if (bind_addr) {
  198. hdl->sock.bind = addr;
  199. memcpy(addr, bind_addr, bind_addrlen);
  200. addr += bind_addrlen;
  201. } else {
  202. hdl->sock.bind = NULL;
  203. }
  204. if (dest_addr) {
  205. hdl->sock.conn = addr;
  206. memcpy(addr, dest_addr, dest_addrlen);
  207. addr += dest_addrlen;
  208. } else {
  209. hdl->sock.conn = NULL;
  210. }
  211. hdl->sock.nonblocking = (options & SOCK_NONBLOCK) ?
  212. PAL_TRUE : PAL_FALSE;
  213. hdl->sock.linger = 0;
  214. if (type == pal_type_tcpsrv) {
  215. hdl->sock.receivebuf = 0;
  216. hdl->sock.sendbuf = 0;
  217. } else {
  218. int ret, val, len = sizeof(int);
  219. ret = INLINE_SYSCALL(getsockopt, 5, fd, SOL_SOCKET, SO_RCVBUF,
  220. &val, &len);
  221. hdl->sock.receivebuf = IS_ERR(ret) ? 0 : val;
  222. ret = INLINE_SYSCALL(getsockopt, 5, fd, SOL_SOCKET, SO_SNDBUF,
  223. &val, &len);
  224. hdl->sock.sendbuf = IS_ERR(ret) ? 0 : val;
  225. }
  226. hdl->sock.receivetimeout = 0;
  227. hdl->sock.sendtimeout = 0;
  228. hdl->sock.tcp_cork = PAL_FALSE;
  229. hdl->sock.tcp_keepalive = PAL_FALSE;
  230. hdl->sock.tcp_nodelay = PAL_FALSE;
  231. return hdl;
  232. }
  233. #if ALLOW_BIND_ANY == 0
  234. static bool check_zero (void * mem, size_t size)
  235. {
  236. void * p = mem, * q = mem + size;
  237. while (p < q) {
  238. if (p <= q - sizeof(long)) {
  239. if (*(long *) p)
  240. return false;
  241. p += sizeof(long);
  242. } else if (p <= q - sizeof(int)) {
  243. if (*(int *) p)
  244. return false;
  245. p += sizeof(int);
  246. } else if (p <= q - sizeof(short)) {
  247. if (*(short *) p)
  248. return false;
  249. p += sizeof(short);
  250. } else {
  251. if (*(char *) p)
  252. return false;
  253. p++;
  254. }
  255. }
  256. return true;
  257. }
  258. /* check if an address is "Any" */
  259. static bool check_any_addr (struct sockaddr * addr)
  260. {
  261. if (addr->sa_family == AF_INET) {
  262. struct sockaddr_in * addr_in =
  263. (struct sockaddr_in *) addr;
  264. return addr_in->sin_port == 0 &&
  265. check_zero(&addr_in->sin_addr,
  266. sizeof(addr_in->sin_addr));
  267. } else if (addr->sa_family == AF_INET6) {
  268. struct sockaddr_in6 * addr_in6 =
  269. (struct sockaddr_in6 *) addr;
  270. return addr_in6->sin6_port == 0 &&
  271. check_zero(&addr_in6->sin6_addr,
  272. sizeof(addr_in6->sin6_addr));
  273. }
  274. return false;
  275. }
  276. #endif
  277. /* listen on a tcp socket */
  278. static int tcp_listen (PAL_HANDLE * handle, char * uri, int options)
  279. {
  280. struct sockaddr buffer, * bind_addr = &buffer;
  281. int bind_addrlen;
  282. int ret, fd = -1;
  283. if ((ret = socket_parse_uri(uri, &bind_addr, &bind_addrlen,
  284. NULL, NULL)) < 0)
  285. return ret;
  286. #if ALLOW_BIND_ANY == 0
  287. /* the socket need to have a binding address, a null address or an
  288. any address is not allowed */
  289. if (addr_check_any(bind_addr))
  290. return -PAL_ERROR_INVAL;
  291. #endif
  292. options = HOST_SOCKET_OPTIONS(options);
  293. /* the socket need to have a binding address, a null address or an
  294. any address is not allowed */
  295. if (!bind_addr || addr_check_any(bind_addr) == 0)
  296. return -PAL_ERROR_INVAL;
  297. fd = INLINE_SYSCALL(socket, 3, bind_addr->sa_family,
  298. SOCK_STREAM|SOCK_CLOEXEC|options, 0);
  299. if (IS_ERR(fd))
  300. return -PAL_ERROR_DENIED;
  301. /* must set the socket to be reuseable */
  302. int reuseaddr = 1;
  303. INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
  304. sizeof(int)); // maybe SO_REUSEPORT
  305. ret = INLINE_SYSCALL(bind, 3, fd, bind_addr, bind_addrlen);
  306. if (IS_ERR(ret)) {
  307. switch(ERRNO(ret)) {
  308. case EINVAL:
  309. ret = -PAL_ERROR_INVAL;
  310. goto failed;
  311. case EADDRINUSE:
  312. ret = -PAL_ERROR_STREAMEXIST;
  313. goto failed;
  314. default:
  315. ret = -PAL_ERROR_DENIED;
  316. goto failed;
  317. }
  318. }
  319. ret = INLINE_SYSCALL(listen, 2, fd, DEFAULT_BACKLOG);
  320. if (IS_ERR(ret))
  321. return -PAL_ERROR_DENIED;
  322. *handle = socket_create_handle(pal_type_tcpsrv, fd, options,
  323. bind_addr, bind_addrlen, NULL, 0);
  324. if (!(*handle)) {
  325. ret = -PAL_ERROR_NOMEM;
  326. goto failed;
  327. }
  328. return 0;
  329. failed:
  330. INLINE_SYSCALL(close, 1, fd);
  331. return ret;
  332. }
  333. /* accept a tcp connection */
  334. static int tcp_accept (PAL_HANDLE handle, PAL_HANDLE * client)
  335. {
  336. if (!IS_HANDLE_TYPE(handle, tcpsrv) ||
  337. !handle->sock.bind || handle->sock.conn)
  338. return -PAL_ERROR_NOTSERVER;
  339. if (handle->sock.fd == PAL_IDX_POISON)
  340. return -PAL_ERROR_BADHANDLE;
  341. struct sockaddr * bind_addr = (struct sockaddr *) handle->sock.bind;
  342. int bind_addrlen = addr_size(bind_addr);
  343. struct sockaddr buffer;
  344. socklen_t addrlen = sizeof(struct sockaddr);
  345. int ret = 0;
  346. int newfd = INLINE_SYSCALL(accept4, 4, handle->sock.fd, &buffer,
  347. &addrlen, SOCK_CLOEXEC);
  348. if (IS_ERR(newfd))
  349. switch(ERRNO(newfd)) {
  350. case EWOULDBLOCK:
  351. return -PAL_ERROR_TRYAGAIN;
  352. case ECONNABORTED:
  353. return -PAL_ERROR_STREAMNOTEXIST;
  354. default:
  355. return unix_to_pal_error(ERRNO(newfd));
  356. }
  357. struct sockaddr * dest_addr = &buffer;
  358. int dest_addrlen = addrlen;
  359. *client = socket_create_handle(pal_type_tcp, newfd, 0,
  360. bind_addr, bind_addrlen,
  361. dest_addr, dest_addrlen);
  362. if (!(*client)) {
  363. ret = -PAL_ERROR_NOMEM;
  364. goto failed;
  365. }
  366. return 0;
  367. failed:
  368. INLINE_SYSCALL(close, 1, newfd);
  369. return ret;
  370. }
  371. /* connect on a tcp socket */
  372. static int tcp_connect (PAL_HANDLE * handle, char * uri, int options)
  373. {
  374. struct sockaddr buffer[3];
  375. struct sockaddr * bind_addr = buffer, * dest_addr = buffer + 1;
  376. int bind_addrlen, dest_addrlen;
  377. int ret, fd = -1;
  378. options = HOST_SOCKET_OPTIONS(options);
  379. /* accepting two kind of different uri:
  380. dest-ip:dest-port or bind-ip:bind-port:dest-ip:dest-port */
  381. if ((ret = socket_parse_uri(uri, &bind_addr, &bind_addrlen,
  382. &dest_addr, &dest_addrlen)) < 0)
  383. return ret;
  384. if (!dest_addr)
  385. return -PAL_ERROR_INVAL;
  386. if (bind_addr && bind_addr->sa_family != dest_addr->sa_family)
  387. return -PAL_ERROR_INVAL;
  388. #if ALLOW_BIND_ANY == 0
  389. /* the socket need to have a binding address, a null address or an
  390. any address is not allowed */
  391. if (bind_addr && addr_check_any(bind_addr))
  392. return -PAL_ERROR_INVAL;
  393. #endif
  394. fd = INLINE_SYSCALL(socket, 3, dest_addr->sa_family,
  395. SOCK_STREAM|SOCK_CLOEXEC|options, 0);
  396. if (IS_ERR(fd))
  397. return -PAL_ERROR_DENIED;
  398. if (bind_addr) {
  399. if (IS_ERR(ret)) {
  400. INLINE_SYSCALL(close, 1, fd);
  401. switch (ERRNO(ret)) {
  402. case EADDRINUSE:
  403. ret = -PAL_ERROR_STREAMEXIST;
  404. goto failed;
  405. case EADDRNOTAVAIL:
  406. ret = -PAL_ERROR_ADDRNOTEXIST;
  407. goto failed;
  408. default:
  409. ret = unix_to_pal_error(ERRNO(ret));
  410. goto failed;
  411. }
  412. }
  413. }
  414. ret = INLINE_SYSCALL(connect, 3, fd, dest_addr, dest_addrlen);
  415. if (IS_ERR(ret)) {
  416. ret = unix_to_pal_error(ERRNO(ret));
  417. goto failed;
  418. }
  419. if (!bind_addr) {
  420. /* save some space to get socket address */
  421. bind_addr = buffer + 2;
  422. bind_addrlen = sizeof(struct sockaddr);
  423. /* call getsockname to get socket address */
  424. if ((ret = INLINE_SYSCALL(getsockname, 3, fd,
  425. bind_addr, &bind_addrlen)) < 0)
  426. bind_addr = NULL;
  427. }
  428. *handle = socket_create_handle(pal_type_tcp, fd, options,
  429. bind_addr, bind_addrlen,
  430. dest_addr, dest_addrlen);
  431. if (!(*handle)) {
  432. ret = -PAL_ERROR_NOMEM;
  433. goto failed;
  434. }
  435. return 0;
  436. failed:
  437. INLINE_SYSCALL(close, 1, fd);
  438. return ret;
  439. }
  440. /* 'open' operation of tcp stream */
  441. static int tcp_open (PAL_HANDLE *handle, const char * type, const char * uri,
  442. int access, int share, int create, int options)
  443. {
  444. int uri_len = strlen(uri) + 1;
  445. if (uri_len > PAL_SOCKADDR_SIZE)
  446. return -PAL_ERROR_TOOLONG;
  447. char uri_buf[PAL_SOCKADDR_SIZE];
  448. memcpy(uri_buf, uri, uri_len);
  449. if (strpartcmp_static(type, "tcp.srv:"))
  450. return tcp_listen(handle, uri_buf, options);
  451. if (strpartcmp_static(type, "tcp:"))
  452. return tcp_connect(handle, uri_buf, options);
  453. return -PAL_ERROR_NOTSUPPORT;
  454. }
  455. /* 'read' operation of tcp stream */
  456. static int tcp_read (PAL_HANDLE handle, int offset, int len, void * buf)
  457. {
  458. if (!IS_HANDLE_TYPE(handle, tcp) || !handle->sock.conn)
  459. return -PAL_ERROR_NOTCONNECTION;
  460. if (handle->sock.fd == PAL_IDX_POISON)
  461. return -PAL_ERROR_ENDOFSTREAM;
  462. struct msghdr hdr;
  463. struct iovec iov;
  464. iov.iov_base = buf;
  465. iov.iov_len = len;
  466. hdr.msg_name = NULL;
  467. hdr.msg_namelen = 0;
  468. hdr.msg_iov = &iov;
  469. hdr.msg_iovlen = 1;
  470. hdr.msg_control = NULL;
  471. hdr.msg_controllen = 0;
  472. hdr.msg_flags = 0;
  473. int bytes = INLINE_SYSCALL(recvmsg, 3, handle->sock.fd, &hdr, 0);
  474. if (IS_ERR(bytes))
  475. switch (ERRNO(bytes)) {
  476. case EWOULDBLOCK:
  477. return -PAL_ERROR_TRYAGAIN;
  478. default:
  479. return unix_to_pal_error(ERRNO(bytes));
  480. }
  481. if (!bytes)
  482. return -PAL_ERROR_ENDOFSTREAM;
  483. return bytes;
  484. }
  485. /* write' operation of tcp stream */
  486. static int tcp_write (PAL_HANDLE handle, int offset, int len, const void * buf)
  487. {
  488. if (!IS_HANDLE_TYPE(handle, tcp) || !handle->sock.conn)
  489. return -PAL_ERROR_NOTCONNECTION;
  490. if (handle->sock.fd == PAL_IDX_POISON)
  491. return -PAL_ERROR_CONNFAILED;
  492. struct msghdr hdr;
  493. struct iovec iov;
  494. iov.iov_base = (void *) buf;
  495. iov.iov_len = len;
  496. hdr.msg_name = NULL;
  497. hdr.msg_namelen = 0;
  498. hdr.msg_iov = &iov;
  499. hdr.msg_iovlen = 1;
  500. hdr.msg_control = NULL;
  501. hdr.msg_controllen = 0;
  502. hdr.msg_flags = 0;
  503. int bytes = INLINE_SYSCALL(sendmsg, 3, handle->sock.fd, &hdr, MSG_NOSIGNAL);
  504. if (IS_ERR(bytes))
  505. switch(ERRNO(bytes)) {
  506. case ECONNRESET:
  507. case EPIPE:
  508. return -PAL_ERROR_CONNFAILED;
  509. case EWOULDBLOCK:
  510. handle->__in.flags &= ~WRITEABLE(0);
  511. return -PAL_ERROR_TRYAGAIN;
  512. default:
  513. return unix_to_pal_error(ERRNO(bytes));
  514. }
  515. if (bytes == len)
  516. handle->__in.flags |= WRITEABLE(0);
  517. else
  518. handle->__in.flags &= ~WRITEABLE(0);
  519. return bytes;
  520. }
  521. /* used by 'open' operation of tcp stream for bound socket */
  522. static int udp_bind (PAL_HANDLE * handle, char * uri, int options)
  523. {
  524. struct sockaddr buffer, * bind_addr = &buffer;
  525. int bind_addrlen;
  526. int ret = 0, fd = -1;
  527. if ((ret = socket_parse_uri(uri, &bind_addr, &bind_addrlen,
  528. NULL, NULL)) < 0)
  529. return ret;
  530. assert(bind_addr);
  531. assert(bind_addrlen == addr_size(bind_addr));
  532. #if ALLOW_BIND_ANY == 0
  533. /* the socket need to have a binding address, a null address or an
  534. any address is not allowed */
  535. if (addr_check_any(bind_addr))
  536. return -PAL_ERROR_INVAL;
  537. #endif
  538. options = HOST_SOCKET_OPTIONS(options);
  539. fd = INLINE_SYSCALL(socket, 3, bind_addr->sa_family,
  540. SOCK_DGRAM|SOCK_CLOEXEC|options, 0);
  541. if (IS_ERR(fd))
  542. return -PAL_ERROR_DENIED;
  543. ret = INLINE_SYSCALL(bind, 3, fd, bind_addr, bind_addrlen);
  544. if (IS_ERR(ret)) {
  545. switch (ERRNO(ret)) {
  546. case EADDRINUSE:
  547. ret = -PAL_ERROR_STREAMEXIST;
  548. goto failed;
  549. case EADDRNOTAVAIL:
  550. ret = -PAL_ERROR_ADDRNOTEXIST;
  551. goto failed;
  552. default:
  553. ret = unix_to_pal_error(ERRNO(ret));
  554. goto failed;
  555. }
  556. }
  557. *handle = socket_create_handle(pal_type_udpsrv, fd, options,
  558. bind_addr, bind_addrlen, NULL, 0);
  559. if (!(*handle)) {
  560. ret = -ENOMEM;
  561. goto failed;
  562. }
  563. return 0;
  564. failed:
  565. INLINE_SYSCALL(close, 1, fd);
  566. return ret;
  567. }
  568. /* used by 'open' operation of tcp stream for connected socket */
  569. static int udp_connect (PAL_HANDLE * handle, char * uri, int options)
  570. {
  571. struct sockaddr buffer[2];
  572. struct sockaddr * bind_addr = buffer, * dest_addr = buffer + 1;
  573. int bind_addrlen, dest_addrlen;
  574. int ret, fd = -1;
  575. if ((ret = socket_parse_uri(uri, &bind_addr, &bind_addrlen,
  576. &dest_addr, &dest_addrlen)) < 0)
  577. return ret;
  578. #if ALLOW_BIND_ANY == 0
  579. /* the socket need to have a binding address, a null address or an
  580. any address is not allowed */
  581. if (bind_addr && addr_check_any(bind_addr))
  582. return -PAL_ERROR_INVAL;
  583. #endif
  584. options = HOST_SOCKET_OPTIONS(options);
  585. fd = INLINE_SYSCALL(socket, 3, dest_addr ? dest_addr->sa_family : AF_INET,
  586. SOCK_DGRAM|SOCK_CLOEXEC|options, 0);
  587. if (IS_ERR(fd))
  588. return -PAL_ERROR_DENIED;
  589. if (bind_addr) {
  590. ret = INLINE_SYSCALL(bind, 3, fd, bind_addr, bind_addrlen);
  591. if (IS_ERR(ret)) {
  592. switch (ERRNO(ret)) {
  593. case EADDRINUSE:
  594. ret = -PAL_ERROR_STREAMEXIST;
  595. goto failed;
  596. case EADDRNOTAVAIL:
  597. ret = -PAL_ERROR_ADDRNOTEXIST;
  598. goto failed;
  599. default:
  600. ret = unix_to_pal_error(ERRNO(ret));
  601. goto failed;
  602. }
  603. }
  604. }
  605. *handle = socket_create_handle(dest_addr ? pal_type_udp : pal_type_udpsrv,
  606. fd, options,
  607. bind_addr, bind_addrlen,
  608. dest_addr, dest_addrlen);
  609. if (!(*handle)) {
  610. ret = -ENOMEM;
  611. goto failed;
  612. }
  613. return 0;
  614. failed:
  615. INLINE_SYSCALL(close, 1, fd);
  616. return ret;
  617. }
  618. static int udp_open (PAL_HANDLE *hdl, const char * type, const char * uri,
  619. int access, int share, int create, int options)
  620. {
  621. char buf[PAL_SOCKADDR_SIZE];
  622. int len = strlen(uri);
  623. if (len >= PAL_SOCKADDR_SIZE)
  624. return -PAL_ERROR_TOOLONG;
  625. memcpy(buf, uri, len + 1);
  626. options &= PAL_OPTION_MASK;
  627. if (!strpartcmp_static(type, "udp.srv:"))
  628. return udp_bind(hdl, buf, options);
  629. if (!strpartcmp_static(type, "udp:"))
  630. return udp_connect(hdl, buf, options);
  631. return -PAL_ERROR_NOTSUPPORT;
  632. }
  633. static int udp_receive (PAL_HANDLE handle, int offset, int len, void * buf)
  634. {
  635. if (!IS_HANDLE_TYPE(handle, udp))
  636. return -PAL_ERROR_NOTCONNECTION;
  637. if (handle->sock.fd == PAL_IDX_POISON)
  638. return -PAL_ERROR_BADHANDLE;
  639. struct msghdr hdr;
  640. struct iovec iov;
  641. iov.iov_base = buf;
  642. iov.iov_len = len;
  643. hdr.msg_name = NULL;
  644. hdr.msg_namelen = 0;
  645. hdr.msg_iov = &iov;
  646. hdr.msg_iovlen = 1;
  647. hdr.msg_control = NULL;
  648. hdr.msg_controllen = 0;
  649. hdr.msg_flags = 0;
  650. int bytes = INLINE_SYSCALL(recvmsg, 3, handle->sock.fd, &hdr, 0);
  651. if (IS_ERR(bytes))
  652. switch(ERRNO(bytes)) {
  653. case EWOULDBLOCK:
  654. return -PAL_ERROR_TRYAGAIN;
  655. case EINTR:
  656. return -PAL_ERROR_INTERRUPTED;
  657. default:
  658. return unix_to_pal_error(ERRNO(bytes));
  659. }
  660. return bytes;
  661. }
  662. static int udp_receivebyaddr (PAL_HANDLE handle, int offset, int len,
  663. void * buf, char * addr, int addrlen)
  664. {
  665. if (!IS_HANDLE_TYPE(handle, udpsrv))
  666. return -PAL_ERROR_NOTCONNECTION;
  667. if (handle->sock.fd == PAL_IDX_POISON)
  668. return -PAL_ERROR_BADHANDLE;
  669. struct sockaddr conn_addr;
  670. socklen_t conn_addrlen = sizeof(struct sockaddr);
  671. struct msghdr hdr;
  672. struct iovec iov;
  673. iov.iov_base = buf;
  674. iov.iov_len = len;
  675. hdr.msg_name = &conn_addr;
  676. hdr.msg_namelen = conn_addrlen;
  677. hdr.msg_iov = &iov;
  678. hdr.msg_iovlen = 1;
  679. hdr.msg_control = NULL;
  680. hdr.msg_controllen = 0;
  681. hdr.msg_flags = 0;
  682. int bytes = INLINE_SYSCALL(recvmsg, 3, handle->sock.fd, &hdr, 0);
  683. if (IS_ERR(bytes))
  684. switch(ERRNO(bytes)) {
  685. case EWOULDBLOCK:
  686. return -PAL_ERROR_TRYAGAIN;
  687. case EINTR:
  688. return -PAL_ERROR_INTERRUPTED;
  689. case ECONNREFUSED:
  690. return -PAL_ERROR_STREAMNOTEXIST;
  691. default:
  692. return unix_to_pal_error(ERRNO(bytes));
  693. }
  694. char * tmp = strcpy_static(addr, "udp:", addrlen);
  695. if (!tmp)
  696. return -PAL_ERROR_OVERFLOW;
  697. inet_create_uri(tmp, addr + addrlen - tmp, &conn_addr, hdr.msg_namelen);
  698. return bytes;
  699. }
  700. static int udp_send (PAL_HANDLE handle, int offset, int len, const void * buf)
  701. {
  702. if (!IS_HANDLE_TYPE(handle, udp))
  703. return -PAL_ERROR_NOTCONNECTION;
  704. if (handle->sock.fd == PAL_IDX_POISON)
  705. return -PAL_ERROR_BADHANDLE;
  706. struct msghdr hdr;
  707. struct iovec iov;
  708. iov.iov_base = (void *) buf;
  709. iov.iov_len = len;
  710. hdr.msg_name = handle->sock.conn;
  711. hdr.msg_namelen = addr_size(handle->sock.conn);
  712. hdr.msg_iov = &iov;
  713. hdr.msg_iovlen = 1;
  714. hdr.msg_control = NULL;
  715. hdr.msg_controllen = 0;
  716. hdr.msg_flags = 0;
  717. int bytes = INLINE_SYSCALL(sendmsg, 3, handle->sock.fd, &hdr, MSG_NOSIGNAL);
  718. if (IS_ERR(bytes))
  719. switch(ERRNO(bytes)) {
  720. case EAGAIN:
  721. handle->__in.flags &= ~WRITEABLE(0);
  722. return -PAL_ERROR_TRYAGAIN;
  723. case ECONNRESET:
  724. case EPIPE:
  725. return -PAL_ERROR_CONNFAILED;
  726. default:
  727. return unix_to_pal_error(ERRNO(bytes));
  728. }
  729. if (bytes == len)
  730. handle->__in.flags |= WRITEABLE(0);
  731. else
  732. handle->__in.flags &= ~WRITEABLE(0);
  733. return bytes;
  734. }
  735. static int udp_sendbyaddr (PAL_HANDLE handle, int offset, int len,
  736. const void * buf, const char * addr, int addrlen)
  737. {
  738. if (!IS_HANDLE_TYPE(handle, udpsrv))
  739. return -PAL_ERROR_NOTCONNECTION;
  740. if (handle->sock.fd == PAL_IDX_POISON)
  741. return -PAL_ERROR_BADHANDLE;
  742. if (strpartcmp_static(addr, "udp:"))
  743. return -PAL_ERROR_INVAL;
  744. addr += static_strlen("udp:");
  745. addrlen -= static_strlen("udp:");
  746. char * addrbuf = __alloca(addrlen + 1);
  747. memcpy(addrbuf, addr, addrlen + 1);
  748. struct sockaddr conn_addr;
  749. int conn_addrlen;
  750. int ret = inet_parse_uri(&addrbuf, &conn_addr, &conn_addrlen);
  751. if (ret < 0)
  752. return ret;
  753. struct msghdr hdr;
  754. struct iovec iov;
  755. iov.iov_base = (void *) buf;
  756. iov.iov_len = len;
  757. hdr.msg_name = &conn_addr;
  758. hdr.msg_namelen = conn_addrlen;
  759. hdr.msg_iov = &iov;
  760. hdr.msg_iovlen = 1;
  761. hdr.msg_control = NULL;
  762. hdr.msg_controllen = 0;
  763. hdr.msg_flags = 0;
  764. int bytes = INLINE_SYSCALL(sendmsg, 3, handle->sock.fd, &hdr, MSG_NOSIGNAL);
  765. if (IS_ERR(bytes))
  766. switch(ERRNO(bytes)) {
  767. case ECONNRESET:
  768. case EPIPE:
  769. return -PAL_ERROR_CONNFAILED;
  770. case EAGAIN:
  771. handle->__in.flags &= ~WRITEABLE(0);
  772. default:
  773. return unix_to_pal_error(ERRNO(bytes));
  774. }
  775. if (bytes == len)
  776. handle->__in.flags |= WRITEABLE(0);
  777. else
  778. handle->__in.flags &= ~WRITEABLE(0);
  779. return bytes;
  780. }
  781. static int socket_delete (PAL_HANDLE handle, int access)
  782. {
  783. if (handle->sock.fd == PAL_IDX_POISON)
  784. return 0;
  785. if (!IS_HANDLE_TYPE(handle, tcp) && access)
  786. return -PAL_ERROR_INVAL;
  787. if (IS_HANDLE_TYPE(handle, tcp) || IS_HANDLE_TYPE(handle, tcpsrv)) {
  788. int shutdown;
  789. switch (access) {
  790. case 0:
  791. shutdown = SHUT_RDWR;
  792. break;
  793. case PAL_DELETE_RD:
  794. shutdown = SHUT_RD;
  795. break;
  796. case PAL_DELETE_WR:
  797. shutdown = SHUT_WR;
  798. break;
  799. default:
  800. return -PAL_ERROR_INVAL;
  801. }
  802. INLINE_SYSCALL(shutdown, 2, handle->sock.fd, shutdown);
  803. }
  804. return 0;
  805. }
  806. static int socket_close (PAL_HANDLE handle)
  807. {
  808. if (handle->sock.fd != PAL_IDX_POISON) {
  809. INLINE_SYSCALL(close, 1, handle->sock.fd);
  810. handle->sock.fd = PAL_IDX_POISON;
  811. }
  812. if (handle->sock.bind)
  813. handle->sock.bind = NULL;
  814. if (handle->sock.conn)
  815. handle->sock.conn = NULL;
  816. return 0;
  817. }
  818. static int socket_attrquerybyhdl (PAL_HANDLE handle, PAL_STREAM_ATTR * attr)
  819. {
  820. if (handle->sock.fd == PAL_IDX_POISON)
  821. return -PAL_ERROR_BADHANDLE;
  822. int fd = handle->sock.fd, ret, val;
  823. if (handle->sock.conn) {
  824. /* try use ioctl FIONEAD to get the size of socket */
  825. ret = INLINE_SYSCALL(ioctl, 3, fd, FIONREAD, &val);
  826. if (IS_ERR(ret))
  827. return unix_to_pal_error(ERRNO(ret));
  828. attr->pending_size = val;
  829. attr->readable = !!attr->pending_size > 0;
  830. } else {
  831. attr->readable = !attr->disconnected;
  832. }
  833. attr->handle_type = handle->__in.type;
  834. attr->disconnected = handle->__in.flags & ERROR(0);
  835. attr->nonblocking = handle->sock.nonblocking;
  836. attr->writeable = handle->__in.flags & WRITEABLE(0);
  837. attr->socket.linger = handle->sock.linger;
  838. attr->socket.receivebuf = handle->sock.receivebuf;
  839. attr->socket.sendbuf = handle->sock.sendbuf;
  840. attr->socket.receivetimeout = handle->sock.receivetimeout;
  841. attr->socket.sendtimeout = handle->sock.sendtimeout;
  842. attr->socket.tcp_cork = handle->sock.tcp_cork;
  843. attr->socket.tcp_keepalive = handle->sock.tcp_keepalive;
  844. attr->socket.tcp_nodelay = handle->sock.tcp_nodelay;
  845. return 0;
  846. }
  847. static int socket_attrsetbyhdl (PAL_HANDLE handle, PAL_STREAM_ATTR * attr)
  848. {
  849. if (handle->sock.fd == PAL_IDX_POISON)
  850. return -PAL_ERROR_BADHANDLE;
  851. int fd = handle->sock.fd, ret, val;
  852. if (attr->nonblocking != handle->sock.nonblocking) {
  853. ret = INLINE_SYSCALL(fcntl, 3, fd, F_SETFL,
  854. attr->nonblocking ? O_NONBLOCK : 0);
  855. if (IS_ERR(ret))
  856. return unix_to_pal_error(ERRNO(ret));
  857. handle->sock.nonblocking = attr->nonblocking;
  858. }
  859. if (IS_HANDLE_TYPE(handle, tcpsrv)) {
  860. struct __kernel_linger {
  861. int l_onoff;
  862. int l_linger;
  863. };
  864. if (attr->socket.linger != handle->sock.linger) {
  865. struct __kernel_linger l;
  866. l.l_onoff = attr->socket.linger ? 1 : 0;
  867. l.l_linger = attr->socket.linger;
  868. ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_LINGER,
  869. &l, sizeof(struct __kernel_linger));
  870. if (IS_ERR(ret))
  871. return unix_to_pal_error(ERRNO(ret));
  872. handle->sock.linger = attr->socket.linger;
  873. }
  874. if (attr->socket.receivebuf != handle->sock.receivebuf) {
  875. int val = attr->socket.receivebuf;
  876. ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_RCVBUF,
  877. &val, sizeof(int));
  878. if (IS_ERR(ret))
  879. return unix_to_pal_error(ERRNO(ret));
  880. handle->sock.receivebuf = attr->socket.receivebuf;
  881. }
  882. if (attr->socket.sendbuf != handle->sock.sendbuf) {
  883. int val = attr->socket.sendbuf;
  884. ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_SNDBUF,
  885. &val, sizeof(int));
  886. if (IS_ERR(ret))
  887. return unix_to_pal_error(ERRNO(ret));
  888. handle->sock.sendbuf = attr->socket.sendbuf;
  889. }
  890. if (attr->socket.receivetimeout != handle->sock.receivetimeout) {
  891. int val = attr->socket.receivetimeout;
  892. ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_RCVTIMEO,
  893. &val, sizeof(int));
  894. if (IS_ERR(ret))
  895. return unix_to_pal_error(ERRNO(ret));
  896. handle->sock.receivetimeout = attr->socket.receivetimeout;
  897. }
  898. if (attr->socket.sendtimeout != handle->sock.sendtimeout) {
  899. int val = attr->socket.sendtimeout;
  900. ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_SNDTIMEO,
  901. &val, sizeof(int));
  902. if (IS_ERR(ret))
  903. return unix_to_pal_error(ERRNO(ret));
  904. handle->sock.sendtimeout = attr->socket.sendtimeout;
  905. }
  906. }
  907. if (IS_HANDLE_TYPE(handle, tcp) || IS_HANDLE_TYPE(handle, tcpsrv)) {
  908. if (attr->socket.tcp_cork != handle->sock.tcp_cork) {
  909. val = attr->socket.tcp_cork ? 1 : 0;
  910. ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_TCP, TCP_CORK,
  911. &val, sizeof(int));
  912. if (IS_ERR(ret))
  913. return unix_to_pal_error(ERRNO(ret));
  914. handle->sock.tcp_cork = attr->socket.tcp_cork;
  915. }
  916. if (attr->socket.tcp_keepalive != handle->sock.tcp_keepalive) {
  917. val = attr->socket.tcp_keepalive ? 1 : 0;
  918. ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_KEEPALIVE,
  919. &val, sizeof(int));
  920. if (IS_ERR(ret))
  921. return unix_to_pal_error(ERRNO(ret));
  922. handle->sock.tcp_keepalive = attr->socket.tcp_keepalive;
  923. }
  924. if (attr->socket.tcp_nodelay != handle->sock.tcp_nodelay) {
  925. val = attr->socket.tcp_nodelay ? 1 : 0;
  926. ret = INLINE_SYSCALL(setsockopt, 5, fd, SOL_TCP, TCP_NODELAY,
  927. &val, sizeof(int));
  928. if (IS_ERR(ret))
  929. return unix_to_pal_error(ERRNO(ret));
  930. handle->sock.tcp_nodelay = attr->socket.tcp_nodelay;
  931. }
  932. }
  933. return 0;
  934. }
  935. static int socket_getname (PAL_HANDLE handle, char * buffer, int count)
  936. {
  937. int old_count = count;
  938. int ret;
  939. const char * prefix = NULL;
  940. int prefix_len = 0;
  941. struct sockaddr * bind_addr = NULL, * dest_addr = NULL;
  942. switch (PAL_GET_TYPE(handle)) {
  943. case pal_type_tcpsrv:
  944. prefix_len = 7;
  945. prefix = "tcp.srv";
  946. bind_addr = handle->sock.bind;
  947. break;
  948. case pal_type_tcp:
  949. prefix_len = 3;
  950. prefix = "tcp";
  951. bind_addr = handle->sock.bind;
  952. dest_addr = handle->sock.conn;
  953. break;
  954. case pal_type_udpsrv:
  955. prefix_len = 7;
  956. prefix = "udp.srv";
  957. bind_addr = handle->sock.bind;
  958. break;
  959. case pal_type_udp:
  960. prefix_len = 3;
  961. prefix = "udp";
  962. bind_addr = handle->sock.bind;
  963. dest_addr = handle->sock.conn;
  964. break;
  965. default:
  966. return -PAL_ERROR_INVAL;
  967. }
  968. if (prefix_len >= count)
  969. return -PAL_ERROR_OVERFLOW;
  970. memcpy(buffer, prefix, prefix_len + 1);
  971. buffer += prefix_len;
  972. count -= prefix_len;
  973. for (int i = 0 ; i < 2 ; i++) {
  974. struct sockaddr * addr = i ? dest_addr : bind_addr;
  975. if (addr) {
  976. if (count <= 1)
  977. return -PAL_ERROR_OVERFLOW;
  978. buffer[0] = ':';
  979. buffer[1] = 0;
  980. buffer++;
  981. count--;
  982. if ((ret = inet_create_uri(buffer, count, addr,
  983. addr_size(addr))) < 0)
  984. return ret;
  985. buffer += ret;
  986. count -= ret;
  987. }
  988. }
  989. return old_count - count;
  990. }
  991. struct handle_ops tcp_ops = {
  992. .getname = &socket_getname,
  993. .open = &tcp_open,
  994. .waitforclient = &tcp_accept,
  995. .read = &tcp_read,
  996. .write = &tcp_write,
  997. .delete = &socket_delete,
  998. .close = &socket_close,
  999. .attrquerybyhdl = &socket_attrquerybyhdl,
  1000. .attrsetbyhdl = &socket_attrsetbyhdl,
  1001. };
  1002. struct handle_ops udp_ops = {
  1003. .getname = &socket_getname,
  1004. .open = &udp_open,
  1005. .read = &udp_receive,
  1006. .write = &udp_send,
  1007. .delete = &socket_delete,
  1008. .close = &socket_close,
  1009. .attrquerybyhdl = &socket_attrquerybyhdl,
  1010. .attrsetbyhdl = &socket_attrsetbyhdl,
  1011. };
  1012. struct handle_ops udpsrv_ops = {
  1013. .getname = &socket_getname,
  1014. .open = &udp_open,
  1015. .readbyaddr = &udp_receivebyaddr,
  1016. .writebyaddr = &udp_sendbyaddr,
  1017. .delete = &socket_delete,
  1018. .close = &socket_close,
  1019. .attrquerybyhdl = &socket_attrquerybyhdl,
  1020. .attrsetbyhdl = &socket_attrsetbyhdl,
  1021. };
  1022. static int mcast_s (PAL_HANDLE handle, int port)
  1023. {
  1024. handle->mcast.srv = PAL_IDX_POISON;
  1025. int ret = 0;
  1026. int fd = INLINE_SYSCALL(socket, 3, AF_INET, SOCK_DGRAM, 0);
  1027. if (IS_ERR(fd))
  1028. return -PAL_ERROR_DENIED;
  1029. struct in_addr local;
  1030. local.s_addr = INADDR_ANY;
  1031. ret = INLINE_SYSCALL(setsockopt, 5, fd, IPPROTO_IP, IP_MULTICAST_IF,
  1032. &local, sizeof(local));
  1033. if (IS_ERR(ret))
  1034. return -PAL_ERROR_DENIED;
  1035. handle->__in.flags |= WFD(1)|WRITEABLE(1);
  1036. handle->mcast.srv = fd;
  1037. return 0;
  1038. }
  1039. static int mcast_c (PAL_HANDLE handle, int port)
  1040. {
  1041. handle->mcast.cli = PAL_IDX_POISON;
  1042. int ret = 0;
  1043. int fd = INLINE_SYSCALL(socket, 3, AF_INET, SOCK_DGRAM, 0);
  1044. if (IS_ERR(fd))
  1045. return -PAL_ERROR_DENIED;
  1046. int reuse = 1;
  1047. INLINE_SYSCALL(setsockopt, 5, fd, SOL_SOCKET, SO_REUSEPORT,
  1048. &reuse, sizeof(reuse));
  1049. struct sockaddr_in addr;
  1050. addr.sin_family = AF_INET;
  1051. addr.sin_addr.s_addr = htonl(INADDR_ANY);
  1052. addr.sin_port = htons(port);
  1053. ret = INLINE_SYSCALL(bind, 3, fd, &addr, sizeof(addr));
  1054. if (IS_ERR(ret))
  1055. return -PAL_ERROR_DENIED;
  1056. struct in_addr local;
  1057. local.s_addr = INADDR_ANY;
  1058. ret = INLINE_SYSCALL(setsockopt, 5, fd, IPPROTO_IP, IP_MULTICAST_IF,
  1059. &local, sizeof(local));
  1060. if (IS_ERR(ret))
  1061. return -PAL_ERROR_DENIED;
  1062. struct ip_mreq group;
  1063. inet_pton4(GRAPHENE_MCAST_GROUP, sizeof(GRAPHENE_MCAST_GROUP) - 1,
  1064. &group.imr_multiaddr.s_addr);
  1065. group.imr_interface.s_addr = htonl(INADDR_ANY);
  1066. ret = INLINE_SYSCALL(setsockopt, 5, fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
  1067. &group, sizeof(group));
  1068. if (IS_ERR(ret))
  1069. return -PAL_ERROR_DENIED;
  1070. handle->mcast.cli = fd;
  1071. handle->mcast.nonblocking = PAL_FALSE;
  1072. return 0;
  1073. }
  1074. PAL_HANDLE _DkBroadcastStreamOpen (void)
  1075. {
  1076. if (!pal_sec.mcast_port) {
  1077. unsigned short mcast_port;
  1078. _DkFastRandomBitsRead(&mcast_port, sizeof(unsigned short));
  1079. if (mcast_port < 1024)
  1080. mcast_port += 1024;
  1081. pal_sec.mcast_port = mcast_port > 1024 ? mcast_port : mcast_port + 1204;
  1082. }
  1083. PAL_HANDLE hdl = malloc(HANDLE_SIZE(mcast));
  1084. SET_HANDLE_TYPE(hdl, mcast);
  1085. mcast_s(hdl, pal_sec.mcast_port);
  1086. mcast_c(hdl, pal_sec.mcast_port);
  1087. hdl->mcast.port = pal_sec.mcast_port;
  1088. return hdl;
  1089. }
  1090. static int mcast_send (PAL_HANDLE handle, int offset, int size,
  1091. const void * buf)
  1092. {
  1093. if (handle->mcast.srv == PAL_IDX_POISON)
  1094. return -PAL_ERROR_BADHANDLE;
  1095. struct sockaddr_in addr;
  1096. addr.sin_family = AF_INET;
  1097. inet_pton4(GRAPHENE_MCAST_GROUP, sizeof(GRAPHENE_MCAST_GROUP) - 1,
  1098. &addr.sin_addr.s_addr);
  1099. addr.sin_port = htons(handle->mcast.port);
  1100. struct msghdr hdr;
  1101. struct iovec iov;
  1102. iov.iov_base = (void *) buf;
  1103. iov.iov_len = size;
  1104. hdr.msg_name = &addr;
  1105. hdr.msg_namelen = sizeof(addr);
  1106. hdr.msg_iov = &iov;
  1107. hdr.msg_iovlen = 1;
  1108. hdr.msg_control = NULL;
  1109. hdr.msg_controllen = 0;
  1110. hdr.msg_flags = 0;
  1111. int bytes = INLINE_SYSCALL(sendmsg, 3, handle->mcast.srv, &hdr,
  1112. MSG_NOSIGNAL);
  1113. if (IS_ERR(bytes))
  1114. switch(ERRNO(bytes)) {
  1115. case ECONNRESET:
  1116. case EPIPE:
  1117. return -PAL_ERROR_CONNFAILED;
  1118. case EAGAIN:
  1119. handle->__in.flags &= ~WRITEABLE(1);
  1120. default:
  1121. return unix_to_pal_error(ERRNO(bytes));
  1122. }
  1123. if (bytes == size)
  1124. handle->__in.flags |= WRITEABLE(1);
  1125. else
  1126. handle->__in.flags &= ~WRITEABLE(1);
  1127. return bytes;
  1128. }
  1129. static int mcast_receive (PAL_HANDLE handle, int offset, int size, void * buf)
  1130. {
  1131. if (handle->mcast.cli == PAL_IDX_POISON)
  1132. return -PAL_ERROR_BADHANDLE;
  1133. struct msghdr hdr;
  1134. struct iovec iov;
  1135. iov.iov_base = buf;
  1136. iov.iov_len = size;
  1137. hdr.msg_name = NULL;
  1138. hdr.msg_namelen = 0;
  1139. hdr.msg_iov = &iov;
  1140. hdr.msg_iovlen = 1;
  1141. hdr.msg_control = NULL;
  1142. hdr.msg_controllen = 0;
  1143. hdr.msg_flags = 0;
  1144. int bytes = INLINE_SYSCALL(recvmsg, 3, handle->mcast.cli, &hdr, 0);
  1145. if (IS_ERR(bytes))
  1146. return -PAL_ERROR_DENIED;
  1147. return bytes;
  1148. }
  1149. static int mcast_close (PAL_HANDLE handle)
  1150. {
  1151. if (handle->mcast.srv != PAL_IDX_POISON) {
  1152. INLINE_SYSCALL(close, 1, handle->mcast.srv);
  1153. handle->mcast.srv = PAL_IDX_POISON;
  1154. }
  1155. if (handle->mcast.cli != PAL_IDX_POISON) {
  1156. INLINE_SYSCALL(close, 1, handle->mcast.cli);
  1157. handle->mcast.cli = PAL_IDX_POISON;
  1158. }
  1159. return 0;
  1160. }
  1161. static int mcast_attrquerybyhdl (PAL_HANDLE handle, PAL_STREAM_ATTR * attr)
  1162. {
  1163. int ret, val;
  1164. if (handle->mcast.cli == PAL_IDX_POISON)
  1165. return -PAL_ERROR_BADHANDLE;
  1166. ret = INLINE_SYSCALL(ioctl, 3, handle->mcast.cli, FIONREAD, &val);
  1167. if (IS_ERR(ret))
  1168. return unix_to_pal_error(ERRNO(ret));
  1169. attr->handle_type = pal_type_mcast;
  1170. attr->disconnected = handle->__in.flags & (ERROR(0)|ERROR(1));
  1171. attr->nonblocking = handle->mcast.nonblocking;
  1172. attr->readable = !!val;
  1173. attr->writeable = handle->__in.flags & WRITEABLE(1);
  1174. attr->runnable = PAL_FALSE;
  1175. attr->pending_size = val;
  1176. return 0;
  1177. }
  1178. static int mcast_attrsetbyhdl (PAL_HANDLE handle, PAL_STREAM_ATTR * attr)
  1179. {
  1180. if (handle->mcast.cli == PAL_IDX_POISON)
  1181. return -PAL_ERROR_BADHANDLE;
  1182. int ret;
  1183. PAL_BOL * nonblocking = &handle->mcast.nonblocking;
  1184. if (attr->nonblocking != *nonblocking) {
  1185. ret = INLINE_SYSCALL(fcntl, 3, handle->mcast.cli, F_SETFL,
  1186. *nonblocking ? O_NONBLOCK : 0);
  1187. if (IS_ERR(ret))
  1188. return unix_to_pal_error(ERRNO(ret));
  1189. *nonblocking = attr->nonblocking;
  1190. }
  1191. return 0;
  1192. }
  1193. struct handle_ops mcast_ops = {
  1194. .write = &mcast_send,
  1195. .read = &mcast_receive,
  1196. .close = &mcast_close,
  1197. .attrquerybyhdl = &mcast_attrquerybyhdl,
  1198. .attrsetbyhdl = &mcast_attrsetbyhdl,
  1199. };