| xf.li | bfc6e71 | 2025-02-07 01:54:34 -0800 | [diff] [blame^] | 1 | /* Copyright (C) 1994-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library 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 GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <errno.h> |
| 19 | #include <string.h> |
| 20 | #include <sys/socket.h> |
| 21 | #include <hurd.h> |
| 22 | #include <hurd/fd.h> |
| 23 | #include <hurd/socket.h> |
| 24 | |
| 25 | /* Read N bytes into BUF through socket FD. |
| 26 | If ADDR is not NULL, fill in *ADDR_LEN bytes of it with tha address of |
| 27 | the sender, and store the actual size of the address in *ADDR_LEN. |
| 28 | Returns the number of bytes read or -1 for errors. */ |
| 29 | ssize_t |
| 30 | __recvfrom (int fd, void *buf, size_t n, int flags, __SOCKADDR_ARG addrarg, |
| 31 | socklen_t *addr_len) |
| 32 | { |
| 33 | error_t err; |
| 34 | mach_port_t addrport; |
| 35 | char *bufp = buf; |
| 36 | mach_msg_type_number_t nread = n; |
| 37 | mach_port_t *ports; |
| 38 | mach_msg_type_number_t nports = 0; |
| 39 | char *cdata = NULL; |
| 40 | mach_msg_type_number_t clen = 0; |
| 41 | struct sockaddr *addr = addrarg.__sockaddr__; |
| 42 | |
| 43 | if (err = HURD_DPORT_USE (fd, __socket_recv (port, &addrport, |
| 44 | flags, &bufp, &nread, |
| 45 | &ports, &nports, |
| 46 | &cdata, &clen, |
| 47 | &flags, |
| 48 | n))) |
| 49 | return __hurd_sockfail (fd, flags, err); |
| 50 | |
| 51 | /* Get address data for the returned address port if requested. */ |
| 52 | if (addr != NULL && addrport != MACH_PORT_NULL) |
| 53 | { |
| 54 | char *buf = (char *) addr; |
| 55 | mach_msg_type_number_t buflen = *addr_len; |
| 56 | int type; |
| 57 | |
| 58 | err = __socket_whatis_address (addrport, &type, &buf, &buflen); |
| 59 | if (err == EOPNOTSUPP) |
| 60 | /* If the protocol server can't tell us the address, just return a |
| 61 | zero-length one. */ |
| 62 | { |
| 63 | buf = (char *)addr; |
| 64 | buflen = 0; |
| 65 | err = 0; |
| 66 | } |
| 67 | |
| 68 | if (err) |
| 69 | { |
| 70 | __mach_port_deallocate (__mach_task_self (), addrport); |
| 71 | return __hurd_sockfail (fd, flags, err); |
| 72 | } |
| 73 | |
| 74 | if (*addr_len > buflen) |
| 75 | *addr_len = buflen; |
| 76 | |
| 77 | if (buf != (char *) addr) |
| 78 | { |
| 79 | memcpy (addr, buf, *addr_len); |
| 80 | __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen); |
| 81 | } |
| 82 | |
| 83 | if (buflen > 0) |
| 84 | addr->sa_family = type; |
| 85 | } |
| 86 | else if (addr_len != NULL) |
| 87 | *addr_len = 0; |
| 88 | |
| 89 | __mach_port_deallocate (__mach_task_self (), addrport); |
| 90 | |
| 91 | /* Toss control data; we don't care. */ |
| 92 | __vm_deallocate (__mach_task_self (), (vm_address_t) cdata, clen); |
| 93 | |
| 94 | if (bufp != buf) |
| 95 | { |
| 96 | memcpy (buf, bufp, nread); |
| 97 | __vm_deallocate (__mach_task_self (), (vm_address_t) bufp, nread); |
| 98 | } |
| 99 | |
| 100 | return nread; |
| 101 | } |
| 102 | |
| 103 | weak_alias (__recvfrom, recvfrom) |