Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 1 | /* |
| 2 | * QEMU System Emulator |
| 3 | * |
| 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
Markus Armbruster | 922a01a | 2018-02-01 12:18:46 +0100 | [diff] [blame] | 24 | |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 25 | #include "qemu/osdep.h" |
Marc-André Lureau | 8228e35 | 2017-01-26 17:19:46 +0400 | [diff] [blame] | 26 | #include "chardev/char.h" |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 27 | #include "io/channel-socket.h" |
| 28 | #include "qapi/error.h" |
Markus Armbruster | 922a01a | 2018-02-01 12:18:46 +0100 | [diff] [blame] | 29 | #include "qemu/option.h" |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 30 | |
Marc-André Lureau | 8228e35 | 2017-01-26 17:19:46 +0400 | [diff] [blame] | 31 | #include "chardev/char-io.h" |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 32 | |
| 33 | /***********************************************************/ |
| 34 | /* UDP Net console */ |
| 35 | |
| 36 | typedef struct { |
| 37 | Chardev parent; |
| 38 | QIOChannel *ioc; |
| 39 | uint8_t buf[CHR_READ_BUF_LEN]; |
| 40 | int bufcnt; |
| 41 | int bufptr; |
| 42 | int max_size; |
| 43 | } UdpChardev; |
| 44 | |
| 45 | #define UDP_CHARDEV(obj) OBJECT_CHECK(UdpChardev, (obj), TYPE_CHARDEV_UDP) |
| 46 | |
| 47 | /* Called with chr_write_lock held. */ |
| 48 | static int udp_chr_write(Chardev *chr, const uint8_t *buf, int len) |
| 49 | { |
| 50 | UdpChardev *s = UDP_CHARDEV(chr); |
| 51 | |
| 52 | return qio_channel_write( |
| 53 | s->ioc, (const char *)buf, len, NULL); |
| 54 | } |
| 55 | |
Marc-André Lureau | e0b6767 | 2016-12-23 14:55:54 +0100 | [diff] [blame] | 56 | static void udp_chr_flush_buffer(UdpChardev *s) |
| 57 | { |
| 58 | Chardev *chr = CHARDEV(s); |
| 59 | |
| 60 | while (s->max_size > 0 && s->bufptr < s->bufcnt) { |
| 61 | int n = MIN(s->max_size, s->bufcnt - s->bufptr); |
| 62 | qemu_chr_be_write(chr, &s->buf[s->bufptr], n); |
| 63 | s->bufptr += n; |
| 64 | s->max_size = qemu_chr_be_can_write(chr); |
| 65 | } |
| 66 | } |
| 67 | |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 68 | static int udp_chr_read_poll(void *opaque) |
| 69 | { |
| 70 | Chardev *chr = CHARDEV(opaque); |
| 71 | UdpChardev *s = UDP_CHARDEV(opaque); |
| 72 | |
| 73 | s->max_size = qemu_chr_be_can_write(chr); |
| 74 | |
| 75 | /* If there were any stray characters in the queue process them |
| 76 | * first |
| 77 | */ |
Marc-André Lureau | e0b6767 | 2016-12-23 14:55:54 +0100 | [diff] [blame] | 78 | udp_chr_flush_buffer(s); |
| 79 | |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 80 | return s->max_size; |
| 81 | } |
| 82 | |
| 83 | static gboolean udp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque) |
| 84 | { |
| 85 | Chardev *chr = CHARDEV(opaque); |
| 86 | UdpChardev *s = UDP_CHARDEV(opaque); |
| 87 | ssize_t ret; |
| 88 | |
| 89 | if (s->max_size == 0) { |
| 90 | return TRUE; |
| 91 | } |
| 92 | ret = qio_channel_read( |
| 93 | s->ioc, (char *)s->buf, sizeof(s->buf), NULL); |
| 94 | if (ret <= 0) { |
zhanghailiang | b19456d | 2017-04-19 09:15:32 +0800 | [diff] [blame] | 95 | remove_fd_in_watch(chr); |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 96 | return FALSE; |
| 97 | } |
| 98 | s->bufcnt = ret; |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 99 | s->bufptr = 0; |
Marc-André Lureau | e0b6767 | 2016-12-23 14:55:54 +0100 | [diff] [blame] | 100 | udp_chr_flush_buffer(s); |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 101 | |
| 102 | return TRUE; |
| 103 | } |
| 104 | |
Peter Xu | bb86d05 | 2017-09-21 14:35:54 +0800 | [diff] [blame] | 105 | static void udp_chr_update_read_handler(Chardev *chr) |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 106 | { |
| 107 | UdpChardev *s = UDP_CHARDEV(chr); |
| 108 | |
zhanghailiang | b19456d | 2017-04-19 09:15:32 +0800 | [diff] [blame] | 109 | remove_fd_in_watch(chr); |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 110 | if (s->ioc) { |
zhanghailiang | b19456d | 2017-04-19 09:15:32 +0800 | [diff] [blame] | 111 | chr->gsource = io_add_watch_poll(chr, s->ioc, |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 112 | udp_chr_read_poll, |
| 113 | udp_chr_read, chr, |
Peter Xu | 6bbb6c0 | 2017-09-21 14:35:53 +0800 | [diff] [blame] | 114 | chr->gcontext); |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 115 | } |
| 116 | } |
| 117 | |
| 118 | static void char_udp_finalize(Object *obj) |
| 119 | { |
| 120 | Chardev *chr = CHARDEV(obj); |
| 121 | UdpChardev *s = UDP_CHARDEV(obj); |
| 122 | |
zhanghailiang | b19456d | 2017-04-19 09:15:32 +0800 | [diff] [blame] | 123 | remove_fd_in_watch(chr); |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 124 | if (s->ioc) { |
| 125 | object_unref(OBJECT(s->ioc)); |
| 126 | } |
| 127 | qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| 128 | } |
| 129 | |
| 130 | static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend, |
| 131 | Error **errp) |
| 132 | { |
| 133 | const char *host = qemu_opt_get(opts, "host"); |
| 134 | const char *port = qemu_opt_get(opts, "port"); |
| 135 | const char *localaddr = qemu_opt_get(opts, "localaddr"); |
| 136 | const char *localport = qemu_opt_get(opts, "localport"); |
| 137 | bool has_local = false; |
Markus Armbruster | dfd100f | 2017-04-26 09:36:39 +0200 | [diff] [blame] | 138 | SocketAddressLegacy *addr; |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 139 | ChardevUdp *udp; |
| 140 | |
| 141 | backend->type = CHARDEV_BACKEND_KIND_UDP; |
| 142 | if (host == NULL || strlen(host) == 0) { |
| 143 | host = "localhost"; |
| 144 | } |
| 145 | if (port == NULL || strlen(port) == 0) { |
| 146 | error_setg(errp, "chardev: udp: remote port not specified"); |
| 147 | return; |
| 148 | } |
| 149 | if (localport == NULL || strlen(localport) == 0) { |
| 150 | localport = "0"; |
| 151 | } else { |
| 152 | has_local = true; |
| 153 | } |
| 154 | if (localaddr == NULL || strlen(localaddr) == 0) { |
| 155 | localaddr = ""; |
| 156 | } else { |
| 157 | has_local = true; |
| 158 | } |
| 159 | |
| 160 | udp = backend->u.udp.data = g_new0(ChardevUdp, 1); |
| 161 | qemu_chr_parse_common(opts, qapi_ChardevUdp_base(udp)); |
| 162 | |
Markus Armbruster | dfd100f | 2017-04-26 09:36:39 +0200 | [diff] [blame] | 163 | addr = g_new0(SocketAddressLegacy, 1); |
| 164 | addr->type = SOCKET_ADDRESS_LEGACY_KIND_INET; |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 165 | addr->u.inet.data = g_new(InetSocketAddress, 1); |
| 166 | *addr->u.inet.data = (InetSocketAddress) { |
| 167 | .host = g_strdup(host), |
| 168 | .port = g_strdup(port), |
| 169 | .has_ipv4 = qemu_opt_get(opts, "ipv4"), |
| 170 | .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0), |
| 171 | .has_ipv6 = qemu_opt_get(opts, "ipv6"), |
| 172 | .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0), |
| 173 | }; |
| 174 | udp->remote = addr; |
| 175 | |
| 176 | if (has_local) { |
| 177 | udp->has_local = true; |
Markus Armbruster | dfd100f | 2017-04-26 09:36:39 +0200 | [diff] [blame] | 178 | addr = g_new0(SocketAddressLegacy, 1); |
| 179 | addr->type = SOCKET_ADDRESS_LEGACY_KIND_INET; |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 180 | addr->u.inet.data = g_new(InetSocketAddress, 1); |
| 181 | *addr->u.inet.data = (InetSocketAddress) { |
| 182 | .host = g_strdup(localaddr), |
| 183 | .port = g_strdup(localport), |
| 184 | }; |
| 185 | udp->local = addr; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | static void qmp_chardev_open_udp(Chardev *chr, |
| 190 | ChardevBackend *backend, |
| 191 | bool *be_opened, |
| 192 | Error **errp) |
| 193 | { |
| 194 | ChardevUdp *udp = backend->u.udp.data; |
Markus Armbruster | bd269eb | 2017-04-26 09:36:41 +0200 | [diff] [blame] | 195 | SocketAddress *local_addr = socket_address_flatten(udp->local); |
| 196 | SocketAddress *remote_addr = socket_address_flatten(udp->remote); |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 197 | QIOChannelSocket *sioc = qio_channel_socket_new(); |
| 198 | char *name; |
| 199 | UdpChardev *s = UDP_CHARDEV(chr); |
Markus Armbruster | bd269eb | 2017-04-26 09:36:41 +0200 | [diff] [blame] | 200 | int ret; |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 201 | |
Markus Armbruster | bd269eb | 2017-04-26 09:36:41 +0200 | [diff] [blame] | 202 | ret = qio_channel_socket_dgram_sync(sioc, local_addr, remote_addr, errp); |
| 203 | qapi_free_SocketAddress(local_addr); |
| 204 | qapi_free_SocketAddress(remote_addr); |
| 205 | if (ret < 0) { |
Marc-André Lureau | 3b4482a | 2016-12-12 18:48:09 +0300 | [diff] [blame] | 206 | object_unref(OBJECT(sioc)); |
| 207 | return; |
| 208 | } |
| 209 | |
| 210 | name = g_strdup_printf("chardev-udp-%s", chr->label); |
| 211 | qio_channel_set_name(QIO_CHANNEL(sioc), name); |
| 212 | g_free(name); |
| 213 | |
| 214 | s->ioc = QIO_CHANNEL(sioc); |
| 215 | /* be isn't opened until we get a connection */ |
| 216 | *be_opened = false; |
| 217 | } |
| 218 | |
| 219 | static void char_udp_class_init(ObjectClass *oc, void *data) |
| 220 | { |
| 221 | ChardevClass *cc = CHARDEV_CLASS(oc); |
| 222 | |
| 223 | cc->parse = qemu_chr_parse_udp; |
| 224 | cc->open = qmp_chardev_open_udp; |
| 225 | cc->chr_write = udp_chr_write; |
| 226 | cc->chr_update_read_handler = udp_chr_update_read_handler; |
| 227 | } |
| 228 | |
| 229 | static const TypeInfo char_udp_type_info = { |
| 230 | .name = TYPE_CHARDEV_UDP, |
| 231 | .parent = TYPE_CHARDEV, |
| 232 | .instance_size = sizeof(UdpChardev), |
| 233 | .instance_finalize = char_udp_finalize, |
| 234 | .class_init = char_udp_class_init, |
| 235 | }; |
| 236 | |
| 237 | static void register_types(void) |
| 238 | { |
| 239 | type_register_static(&char_udp_type_info); |
| 240 | } |
| 241 | |
| 242 | type_init(register_types); |