| 1 | /* |
| 2 | * Macintosh OpenTransport networking abstraction |
| 3 | */ |
| 4 | |
| 5 | #include <OpenTransport.h> |
| 6 | #include <OpenTptInternet.h> |
| 7 | |
| 8 | #include <string.h> |
| 9 | |
| 10 | #define DEFINE_PLUG_METHOD_MACROS |
| 11 | #include "putty.h" |
| 12 | #include "network.h" |
| 13 | #include "mac.h" |
| 14 | |
| 15 | struct Socket_tag { |
| 16 | struct socket_function_table *fn; |
| 17 | /* other stuff... */ |
| 18 | OSStatus error; |
| 19 | EndpointRef ep; |
| 20 | Plug plug; |
| 21 | void *private_ptr; |
| 22 | bufchain output_data; |
| 23 | int connected; |
| 24 | int writable; |
| 25 | int frozen; /* this causes readability notifications to be ignored */ |
| 26 | int frozen_readable; /* this means we missed at least one readability |
| 27 | * notification while we were frozen */ |
| 28 | int localhost_only; /* for listening sockets */ |
| 29 | char oobdata[1]; |
| 30 | int sending_oob; |
| 31 | int oobpending; /* is there OOB data available to read?*/ |
| 32 | int oobinline; |
| 33 | int pending_error; /* in case send() returns error */ |
| 34 | int listener; |
| 35 | struct Socket_tag *next; |
| 36 | struct Socket_tag **prev; |
| 37 | }; |
| 38 | |
| 39 | typedef struct Socket_tag *Actual_Socket; |
| 40 | |
| 41 | struct SockAddr_tag { |
| 42 | int resolved; |
| 43 | OSStatus error; |
| 44 | InetHostInfo hostinfo; |
| 45 | char hostname[512]; |
| 46 | }; |
| 47 | |
| 48 | /* Globals */ |
| 49 | |
| 50 | static struct { |
| 51 | Actual_Socket socklist; |
| 52 | InetSvcRef inetsvc; |
| 53 | } ot; |
| 54 | |
| 55 | OSErr ot_init(void) |
| 56 | { |
| 57 | OSStatus err; |
| 58 | |
| 59 | err = InitOpenTransport(); |
| 60 | if (err != kOTNoError) return err; |
| 61 | ot.inetsvc = OTOpenInternetServices(kDefaultInternetServicesPath, 0, &err); |
| 62 | return err; |
| 63 | } |
| 64 | |
| 65 | void ot_cleanup(void) |
| 66 | { |
| 67 | Actual_Socket s; |
| 68 | |
| 69 | for (s = ot.socklist; s !=NULL; s = s->next) { |
| 70 | OTUnbind(s->ep); |
| 71 | OTCloseProvider(s->ep); |
| 72 | } |
| 73 | |
| 74 | CloseOpenTransport(); |
| 75 | } |
| 76 | |
| 77 | SockAddr ot_namelookup(char const *host, char **canonicalname) |
| 78 | { |
| 79 | SockAddr ret = smalloc(sizeof(struct SockAddr_tag)); |
| 80 | char *realhost; |
| 81 | |
| 82 | /* Casting away const -- hope OTInetStringToAddress is sensible */ |
| 83 | ret->error = OTInetStringToAddress(ot.inetsvc, (char *)host, |
| 84 | &ret->hostinfo); |
| 85 | ret->resolved = TRUE; |
| 86 | |
| 87 | if (ret->error == kOTNoError) |
| 88 | realhost = ret->hostinfo.name; |
| 89 | else |
| 90 | realhost = ""; |
| 91 | *canonicalname = smalloc(1+strlen(realhost)); |
| 92 | strcpy(*canonicalname, realhost); |
| 93 | return ret; |
| 94 | } |
| 95 | |
| 96 | SockAddr ot_nonamelookup(char const *host) |
| 97 | { |
| 98 | SockAddr ret = smalloc(sizeof(struct SockAddr_tag)); |
| 99 | |
| 100 | ret->resolved = FALSE; |
| 101 | ret->error = kOTNoError; |
| 102 | ret->hostname[0] = '\0'; |
| 103 | strncat(ret->hostname, host, lenof(ret->hostname) - 1); |
| 104 | return ret; |
| 105 | } |
| 106 | |
| 107 | void ot_getaddr(SockAddr addr, char *buf, int buflen) |
| 108 | { |
| 109 | char mybuf[16]; |
| 110 | |
| 111 | buf[0] = '\0'; |
| 112 | if (addr->resolved) { |
| 113 | /* XXX only return first address */ |
| 114 | OTInetHostToString(addr->hostinfo.addrs[0], mybuf); |
| 115 | strncat(buf, mybuf, buflen - 1); |
| 116 | } else |
| 117 | strncat(buf, addr->hostname, buflen - 1); |
| 118 | } |
| 119 | |
| 120 | /* I think "local" here really means "loopback" */ |
| 121 | |
| 122 | int ot_hostname_is_local(char *name) |
| 123 | { |
| 124 | |
| 125 | return !strcmp(name, "localhost"); |
| 126 | } |
| 127 | |
| 128 | int ot_address_is_local(SockAddr addr) |
| 129 | { |
| 130 | int i; |
| 131 | |
| 132 | if (addr->resolved) |
| 133 | for (i = 0; i < kMaxHostAddrs; i++) |
| 134 | if (addr->hostinfo.addrs[i] & 0xff000000 == 0x7f000000) |
| 135 | return TRUE; |
| 136 | return FALSE; |
| 137 | } |
| 138 | |
| 139 | int ot_addrtype(SockAddr addr) |
| 140 | { |
| 141 | |
| 142 | if (addr->resolved) |
| 143 | return ADDRTYPE_IPV4; |
| 144 | return ADDRTYPE_NAME; |
| 145 | } |
| 146 | |
| 147 | void ot_addrcopy(SockAddr addr, char *buf) |
| 148 | { |
| 149 | |
| 150 | /* XXX only return first address */ |
| 151 | memcpy(buf, &addr->hostinfo.addrs[0], 4); |
| 152 | } |
| 153 | |
| 154 | void ot_addr_free(SockAddr addr) |
| 155 | { |
| 156 | sfree(addr); |
| 157 | } |
| 158 | |
| 159 | |
| 160 | static Plug ot_tcp_plug(Socket sock, Plug p) |
| 161 | { |
| 162 | Actual_Socket s = (Actual_Socket) sock; |
| 163 | Plug ret = s->plug; |
| 164 | if (p) |
| 165 | s->plug = p; |
| 166 | return ret; |
| 167 | } |
| 168 | |
| 169 | static void ot_tcp_flush(Socket s) |
| 170 | { |
| 171 | /* |
| 172 | * We send data to the socket as soon as we can anyway, |
| 173 | * so we don't need to do anything here. :-) |
| 174 | */ |
| 175 | } |
| 176 | |
| 177 | static void ot_tcp_close(Socket s); |
| 178 | static int ot_tcp_write(Socket s, char const *data, int len); |
| 179 | static int ot_tcp_write_oob(Socket s, char const *data, int len); |
| 180 | static void ot_tcp_set_private_ptr(Socket s, void *ptr); |
| 181 | static void *ot_tcp_get_private_ptr(Socket s); |
| 182 | static void ot_tcp_set_frozen(Socket s, int is_frozen); |
| 183 | static char *ot_tcp_socket_error(Socket s); |
| 184 | static void ot_recv(Actual_Socket s); |
| 185 | void ot_poll(void); |
| 186 | |
| 187 | Socket ot_register(void *sock, Plug plug) |
| 188 | { |
| 189 | static struct socket_function_table fn_table = { |
| 190 | ot_tcp_plug, |
| 191 | ot_tcp_close, |
| 192 | ot_tcp_write, |
| 193 | ot_tcp_write_oob, |
| 194 | ot_tcp_flush, |
| 195 | ot_tcp_set_private_ptr, |
| 196 | ot_tcp_get_private_ptr, |
| 197 | ot_tcp_set_frozen, |
| 198 | ot_tcp_socket_error |
| 199 | }; |
| 200 | |
| 201 | Actual_Socket ret; |
| 202 | |
| 203 | ret = smalloc(sizeof(struct Socket_tag)); |
| 204 | ret->fn = &fn_table; |
| 205 | ret->error = kOTNoError; |
| 206 | ret->plug = plug; |
| 207 | bufchain_init(&ret->output_data); |
| 208 | ret->writable = 1; /* to start with */ |
| 209 | ret->sending_oob = 0; |
| 210 | ret->frozen = 1; |
| 211 | ret->frozen_readable = 0; |
| 212 | ret->localhost_only = 0; /* unused, but best init anyway */ |
| 213 | ret->pending_error = 0; |
| 214 | ret->oobpending = FALSE; |
| 215 | ret->listener = 0; |
| 216 | |
| 217 | ret->ep = (EndpointRef)sock; |
| 218 | |
| 219 | /* some sort of error checking */ |
| 220 | |
| 221 | ret->oobinline = 0; |
| 222 | |
| 223 | /* Add this to the list of all sockets */ |
| 224 | ret->next = ot.socklist; |
| 225 | ret->prev = &ot.socklist; |
| 226 | ot.socklist = ret; |
| 227 | |
| 228 | return (Socket) ret; |
| 229 | } |
| 230 | |
| 231 | Socket ot_new(SockAddr addr, int port, int privport, int oobinline, |
| 232 | int nodelay, Plug plug) |
| 233 | { |
| 234 | static struct socket_function_table fn_table = { |
| 235 | ot_tcp_plug, |
| 236 | ot_tcp_close, |
| 237 | ot_tcp_write, |
| 238 | ot_tcp_write_oob, |
| 239 | ot_tcp_flush, |
| 240 | ot_tcp_set_private_ptr, |
| 241 | ot_tcp_get_private_ptr, |
| 242 | ot_tcp_set_frozen, |
| 243 | ot_tcp_socket_error |
| 244 | }; |
| 245 | |
| 246 | Actual_Socket ret; |
| 247 | EndpointRef ep; |
| 248 | OSStatus err; |
| 249 | InetAddress dest; |
| 250 | TCall connectCall; |
| 251 | |
| 252 | ret = smalloc(sizeof(struct Socket_tag)); |
| 253 | ret->fn = &fn_table; |
| 254 | ret->error = kOTNoError; |
| 255 | ret->plug = plug; |
| 256 | bufchain_init(&ret->output_data); |
| 257 | ret->connected = 0; /* to start with */ |
| 258 | ret->writable = 0; /* to start with */ |
| 259 | ret->sending_oob = 0; |
| 260 | ret->frozen = 0; |
| 261 | ret->frozen_readable = 0; |
| 262 | ret->localhost_only = 0; /* unused, but best init anyway */ |
| 263 | ret->pending_error = 0; |
| 264 | ret->oobinline = oobinline; |
| 265 | ret->oobpending = FALSE; |
| 266 | ret->listener = 0; |
| 267 | |
| 268 | /* Open Endpoint, configure it for TCP over anything */ |
| 269 | |
| 270 | ep = OTOpenEndpoint(OTCreateConfiguration("tcp"), 0, NULL, &err); |
| 271 | |
| 272 | ret->ep = ep; |
| 273 | |
| 274 | if (err) { |
| 275 | ret->error = err; |
| 276 | return (Socket) ret; |
| 277 | } |
| 278 | |
| 279 | /* TODO: oobinline, nodelay */ |
| 280 | |
| 281 | /* |
| 282 | * Bind to local address. |
| 283 | */ |
| 284 | |
| 285 | /* FIXME: pay attention to privport */ |
| 286 | |
| 287 | err = OTBind(ep, NULL, NULL); /* OpenTransport always picks our address */ |
| 288 | |
| 289 | if (err) { |
| 290 | ret->error = err; |
| 291 | return (Socket) ret; |
| 292 | } |
| 293 | |
| 294 | /* |
| 295 | * Connect to remote address. |
| 296 | */ |
| 297 | |
| 298 | /* XXX Try non-primary addresses */ |
| 299 | OTInitInetAddress(&dest, port, addr->hostinfo.addrs[0]); |
| 300 | |
| 301 | memset(&connectCall, 0, sizeof(TCall)); |
| 302 | connectCall.addr.buf = (UInt8 *) &dest; |
| 303 | connectCall.addr.len = sizeof(dest); |
| 304 | |
| 305 | err = OTConnect(ep, &connectCall, nil); |
| 306 | |
| 307 | if (err) { |
| 308 | ret->error = err; |
| 309 | return (Socket) ret; |
| 310 | } else { |
| 311 | ret->connected = 1; |
| 312 | ret->writable = 1; |
| 313 | } |
| 314 | |
| 315 | /* Add this to the list of all sockets */ |
| 316 | ret->next = ot.socklist; |
| 317 | ret->prev = &ot.socklist; |
| 318 | if (ret->next != NULL) |
| 319 | ret->next->prev = &ret->next; |
| 320 | ot.socklist = ret; |
| 321 | |
| 322 | return (Socket) ret; |
| 323 | } |
| 324 | |
| 325 | Socket ot_newlistener(char *foobar, int port, Plug plug, int local_host_only) |
| 326 | { |
| 327 | Actual_Socket s; |
| 328 | |
| 329 | return (Socket) s; |
| 330 | } |
| 331 | |
| 332 | static void ot_tcp_close(Socket sock) |
| 333 | { |
| 334 | Actual_Socket s = (Actual_Socket) sock; |
| 335 | |
| 336 | OTCloseProvider(s->ep); |
| 337 | |
| 338 | /* Unhitch from list of sockets */ |
| 339 | *s->prev = s->next; |
| 340 | if (s->next != NULL) |
| 341 | s->next->prev = s->prev; |
| 342 | |
| 343 | sfree(s); |
| 344 | } |
| 345 | |
| 346 | static void try_send(Actual_Socket s) |
| 347 | { |
| 348 | while (bufchain_size(&s->output_data) > 0) { |
| 349 | int nsent; |
| 350 | void *data; |
| 351 | int len; |
| 352 | |
| 353 | /* Don't care about oob right now */ |
| 354 | |
| 355 | bufchain_prefix(&s->output_data, &data, &len); |
| 356 | |
| 357 | nsent = OTSnd(s->ep, data, len, 0); |
| 358 | noise_ultralight(nsent); |
| 359 | |
| 360 | if (nsent <= 0) { |
| 361 | /* something bad happened, hey ho */ |
| 362 | } else { |
| 363 | /* still don't care about oob */ |
| 364 | bufchain_consume(&s->output_data, nsent); |
| 365 | } |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | static int ot_tcp_write(Socket sock, char const *buf, int len) |
| 370 | { |
| 371 | Actual_Socket s = (Actual_Socket) sock; |
| 372 | |
| 373 | bufchain_add(&s->output_data, buf, len); |
| 374 | |
| 375 | if (s->writable) |
| 376 | try_send(s); |
| 377 | return bufchain_size(&s->output_data); |
| 378 | } |
| 379 | |
| 380 | static int ot_tcp_write_oob(Socket sock, char const *buf, int len) |
| 381 | { |
| 382 | /* Don't care about oob */ |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | |
| 387 | /* |
| 388 | * Each socket abstraction contains a `void *' private field in |
| 389 | * which the client can keep state. |
| 390 | */ |
| 391 | static void ot_tcp_set_private_ptr(Socket sock, void *ptr) |
| 392 | { |
| 393 | Actual_Socket s = (Actual_Socket) sock; |
| 394 | s->private_ptr = ptr; |
| 395 | } |
| 396 | |
| 397 | static void *ot_tcp_get_private_ptr(Socket sock) |
| 398 | { |
| 399 | Actual_Socket s = (Actual_Socket) sock; |
| 400 | return s->private_ptr; |
| 401 | } |
| 402 | |
| 403 | |
| 404 | /* |
| 405 | * Special error values are returned from ot_namelookup and ot_new |
| 406 | * if there's a problem. These functions extract an error message, |
| 407 | * or return NULL if there's no problem. |
| 408 | */ |
| 409 | char *ot_addr_error(SockAddr addr) |
| 410 | { |
| 411 | static char buf[128]; |
| 412 | |
| 413 | if (addr->error == kOTNoError) |
| 414 | return NULL; |
| 415 | sprintf(buf, "error %d", addr->error); |
| 416 | return buf; |
| 417 | } |
| 418 | static char *ot_tcp_socket_error(Socket sock) |
| 419 | { |
| 420 | Actual_Socket s = (Actual_Socket) sock; |
| 421 | static char buf[128]; |
| 422 | |
| 423 | if (s->error == kOTNoError) |
| 424 | return NULL; |
| 425 | sprintf(buf, "error %d", s->error); |
| 426 | return buf; |
| 427 | } |
| 428 | |
| 429 | static void ot_tcp_set_frozen(Socket sock, int is_frozen) |
| 430 | { |
| 431 | Actual_Socket s = (Actual_Socket) sock; |
| 432 | |
| 433 | if (s->frozen == is_frozen) |
| 434 | return; |
| 435 | s->frozen = is_frozen; |
| 436 | } |
| 437 | |
| 438 | /* |
| 439 | * Poll all our sockets from an event loop |
| 440 | */ |
| 441 | |
| 442 | void ot_poll(void) |
| 443 | { |
| 444 | Actual_Socket s; |
| 445 | OTResult o; |
| 446 | |
| 447 | for (s = ot.socklist; s != NULL; s = s->next) { |
| 448 | o = OTLook(s->ep); |
| 449 | |
| 450 | switch(o) { |
| 451 | case T_DATA: /* Normal Data */ |
| 452 | ot_recv(s); |
| 453 | break; |
| 454 | case T_EXDATA: /* Expedited Data (urgent?) */ |
| 455 | ot_recv(s); |
| 456 | break; |
| 457 | } |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | void ot_recv(Actual_Socket s) |
| 462 | { |
| 463 | OTResult o; |
| 464 | char buf[20480]; |
| 465 | OTFlags flags; |
| 466 | |
| 467 | if (s->frozen) return; |
| 468 | |
| 469 | do { |
| 470 | o = OTRcv(s->ep, buf, sizeof(buf), &flags); |
| 471 | if (o > 0) |
| 472 | plug_receive(s->plug, 0, buf, o); |
| 473 | if (o < 0 && o != kOTNoDataErr) |
| 474 | plug_closing(s->plug, NULL, 0, 0); /* XXX Error msg */ |
| 475 | } while (o > 0); |
| 476 | } |
| 477 | |
| 478 | |
| 479 | /* |
| 480 | * Local Variables: |
| 481 | * c-file-style: "simon" |
| 482 | * End: |
| 483 | */ |