| 1 | /* Serial interface for local domain connections on Un*x like systems. |
| 2 | |
| 3 | Copyright (C) 1992-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "serial.h" |
| 22 | #include "ser-base.h" |
| 23 | |
| 24 | #include <sys/socket.h> |
| 25 | #include <sys/un.h> |
| 26 | |
| 27 | #ifndef UNIX_PATH_MAX |
| 28 | #define UNIX_PATH_MAX sizeof(((struct sockaddr_un *) NULL)->sun_path) |
| 29 | #endif |
| 30 | |
| 31 | /* Open an AF_UNIX socket. */ |
| 32 | |
| 33 | static int |
| 34 | uds_open (struct serial *scb, const char *name) |
| 35 | { |
| 36 | struct sockaddr_un addr; |
| 37 | |
| 38 | if (strlen (name) > UNIX_PATH_MAX - 1) |
| 39 | { |
| 40 | warning |
| 41 | (_("The socket name is too long. It may be no longer than %s bytes."), |
| 42 | pulongest (UNIX_PATH_MAX - 1L)); |
| 43 | return -1; |
| 44 | } |
| 45 | |
| 46 | memset (&addr, 0, sizeof addr); |
| 47 | addr.sun_family = AF_UNIX; |
| 48 | strncpy (addr.sun_path, name, UNIX_PATH_MAX - 1); |
| 49 | |
| 50 | int sock = socket (AF_UNIX, SOCK_STREAM, 0); |
| 51 | |
| 52 | if (connect (sock, (struct sockaddr *) &addr, |
| 53 | sizeof (struct sockaddr_un)) < 0) |
| 54 | { |
| 55 | close (sock); |
| 56 | scb->fd = -1; |
| 57 | return -1; |
| 58 | } |
| 59 | |
| 60 | scb->fd = sock; |
| 61 | |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static void |
| 66 | uds_close (struct serial *scb) |
| 67 | { |
| 68 | if (scb->fd == -1) |
| 69 | return; |
| 70 | |
| 71 | close (scb->fd); |
| 72 | scb->fd = -1; |
| 73 | } |
| 74 | |
| 75 | static int |
| 76 | uds_read_prim (struct serial *scb, size_t count) |
| 77 | { |
| 78 | return recv (scb->fd, scb->buf, count, 0); |
| 79 | } |
| 80 | |
| 81 | static int |
| 82 | uds_write_prim (struct serial *scb, const void *buf, size_t count) |
| 83 | { |
| 84 | return send (scb->fd, buf, count, 0); |
| 85 | } |
| 86 | |
| 87 | /* The local socket ops. */ |
| 88 | |
| 89 | static const struct serial_ops uds_ops = |
| 90 | { |
| 91 | "local", |
| 92 | uds_open, |
| 93 | uds_close, |
| 94 | NULL, |
| 95 | ser_base_readchar, |
| 96 | ser_base_write, |
| 97 | ser_base_flush_output, |
| 98 | ser_base_flush_input, |
| 99 | ser_base_send_break, |
| 100 | ser_base_raw, |
| 101 | ser_base_get_tty_state, |
| 102 | ser_base_copy_tty_state, |
| 103 | ser_base_set_tty_state, |
| 104 | ser_base_print_tty_state, |
| 105 | ser_base_setbaudrate, |
| 106 | ser_base_setstopbits, |
| 107 | ser_base_setparity, |
| 108 | ser_base_drain_output, |
| 109 | ser_base_async, |
| 110 | uds_read_prim, |
| 111 | uds_write_prim |
| 112 | }; |
| 113 | |
| 114 | void |
| 115 | _initialize_ser_socket (void) |
| 116 | { |
| 117 | serial_add_interface (&uds_ops); |
| 118 | } |