git.distorted.org.uk Git - u/mdw/putty/blob - mac/otnet.c

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