[u/mdw/putty] / mac / otnet.c

/*
 * Macintosh OpenTransport networking abstraction
 */

#include <OpenTransport.h>
#include <OpenTptInternet.h>

#include <string.h>

#define DEFINE_PLUG_METHOD_MACROS
#include "putty.h"
#include "network.h"
#include "mac.h"

struct Socket_tag {
    struct socket_function_table *fn;
    /* other stuff... */
    OSStatus error;
    EndpointRef ep;
    Plug plug;
    void *private_ptr;
    bufchain output_data;
    int connected;
    int writable;
    int frozen; /* this causes readability notifications to be ignored */
    int frozen_readable; /* this means we missed at least one readability
                          * notification while we were frozen */
    int localhost_only;                /* for listening sockets */
    char oobdata[1];
    int sending_oob;
    int oobpending;        /* is there OOB data available to read?*/
    int oobinline;
    int pending_error;                 /* in case send() returns error */
    int listener;
    struct Socket_tag *next;
    struct Socket_tag **prev;
};

typedef struct Socket_tag *Actual_Socket;

struct SockAddr_tag {
    int resolved;
    OSStatus error;
    InetHostInfo hostinfo;
    char hostname[512];
};

/* Globals */

static struct {
    Actual_Socket socklist;
    InetSvcRef inetsvc;
} ot;

OSErr ot_init(void)
{
    OSStatus err;

    err = InitOpenTransport();
    if (err != kOTNoError) return err;
    ot.inetsvc = OTOpenInternetServices(kDefaultInternetServicesPath, 0, &err);
    return err;
}

void ot_cleanup(void)
{
    Actual_Socket s;

    for (s = ot.socklist; s !=NULL; s = s->next) {
	OTUnbind(s->ep);
	OTCloseProvider(s->ep);
    }

    CloseOpenTransport();
}

SockAddr ot_namelookup(char *host, char **canonicalname)
{
    SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
    char *realhost;
    
    ret->error = OTInetStringToAddress(ot.inetsvc, host, &ret->hostinfo);
    ret->resolved = TRUE;

    if (ret->error == kOTNoError)
	realhost = ret->hostinfo.name;
    else
	realhost = "";
    *canonicalname = smalloc(1+strlen(realhost));
    strcpy(*canonicalname, realhost);
    return ret;
}

SockAddr ot_nonamelookup(char *host)
{
    SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
    
    ret->resolved = FALSE;
    ret->error = kOTNoError;
    ret->hostname[0] = '\0';
    strncat(ret->hostname, host, lenof(ret->hostname) - 1);
    return ret;
}

void ot_getaddr(SockAddr addr, char *buf, int buflen)
{
    char mybuf[16];

    buf[0] = '\0';
    if (addr->resolved) {
	/* XXX only return first address */
	OTInetHostToString(addr->hostinfo.addrs[0], mybuf);
	strncat(buf, mybuf, buflen - 1);
    } else
	strncat(buf, addr->hostname, buflen - 1);
}

/* I think "local" here really means "loopback" */

int ot_hostname_is_local(char *name)
{

    return !strcmp(name, "localhost");
}

int ot_address_is_local(SockAddr addr)
{
    int i;

    if (addr->resolved)
	for (i = 0; i < kMaxHostAddrs; i++)
	    if (addr->hostinfo.addrs[i] & 0xff000000 == 0x7f000000)
		return TRUE;
    return FALSE;
}

int ot_addrtype(SockAddr addr)
{

    if (addr->resolved)
	return ADDRTYPE_IPV4;
    return ADDRTYPE_NAME;
}

void ot_addrcopy(SockAddr addr, char *buf)
{

    /* XXX only return first address */
    memcpy(buf, &addr->hostinfo.addrs[0], 4);
}

void ot_addr_free(SockAddr addr)
{
    sfree(addr);
}


static Plug ot_tcp_plug(Socket sock, Plug p)
{
    Actual_Socket s = (Actual_Socket) sock;
    Plug ret = s->plug;
    if (p)
	s->plug = p;
    return ret;
}

static void ot_tcp_flush(Socket s)
{
    /*
     * We send data to the socket as soon as we can anyway,
     * so we don't need to do anything here.  :-)
     */
}

static void ot_tcp_close(Socket s);
static int ot_tcp_write(Socket s, char const *data, int len);
static int ot_tcp_write_oob(Socket s, char const *data, int len);
static void ot_tcp_set_private_ptr(Socket s, void *ptr);
static void *ot_tcp_get_private_ptr(Socket s);
static void ot_tcp_set_frozen(Socket s, int is_frozen);
static char *ot_tcp_socket_error(Socket s);
static void ot_recv(Actual_Socket s);
void ot_poll(void);

Socket ot_register(void *sock, Plug plug)
{
    static struct socket_function_table fn_table = {
	ot_tcp_plug,
	ot_tcp_close,
	ot_tcp_write,
	ot_tcp_write_oob,
	ot_tcp_flush,
	ot_tcp_set_private_ptr,
	ot_tcp_get_private_ptr,
	ot_tcp_set_frozen,
	ot_tcp_socket_error
    };
    
    Actual_Socket ret;

    ret = smalloc(sizeof(struct Socket_tag));
    ret->fn = &fn_table;
    ret->error = kOTNoError;
    ret->plug = plug;
    bufchain_init(&ret->output_data);
    ret->writable = 1;                 /* to start with */
    ret->sending_oob = 0;
    ret->frozen = 1;
    ret->frozen_readable = 0;
    ret->localhost_only = 0;           /* unused, but best init anyway */
    ret->pending_error = 0;
    ret->oobpending = FALSE;
    ret->listener = 0;

    ret->ep = (EndpointRef)sock;
  
    /* some sort of error checking */

    ret->oobinline = 0;
  
    /* Add this to the list of all sockets */
    ret->next = ot.socklist;
    ret->prev = &ot.socklist;
    ot.socklist = ret;

    return (Socket) ret;
}

Socket ot_new(SockAddr addr, int port, int privport, int oobinline,
	      int nodelay, Plug plug)
{
    static struct socket_function_table fn_table = {
	ot_tcp_plug,
	ot_tcp_close,
	ot_tcp_write,
	ot_tcp_write_oob,
	ot_tcp_flush,
	ot_tcp_set_private_ptr,
	ot_tcp_get_private_ptr,
	ot_tcp_set_frozen,
	ot_tcp_socket_error
    };

    Actual_Socket ret;
    EndpointRef ep;
    OSStatus err;
    InetAddress dest;
    TCall connectCall;

    ret = smalloc(sizeof(struct Socket_tag));
    ret->fn = &fn_table;
    ret->error = kOTNoError;
    ret->plug = plug;
    bufchain_init(&ret->output_data);
    ret->connected = 0;                /* to start with */
    ret->writable = 0;                 /* to start with */
    ret->sending_oob = 0;
    ret->frozen = 0;
    ret->frozen_readable = 0;
    ret->localhost_only = 0;           /* unused, but best init anyway */
    ret->pending_error = 0;
    ret->oobinline = oobinline;
    ret->oobpending = FALSE;
    ret->listener = 0;

    /* Open Endpoint, configure it for TCP over anything */

    ep = OTOpenEndpoint(OTCreateConfiguration("tcp"), 0, NULL, &err);

    ret->ep = ep;

    if (err) {
	ret->error = err;
	return (Socket) ret;
    }

    /* TODO: oobinline, nodelay */

    /*
     * Bind to local address.
     */
  
    /* FIXME: pay attention to privport */

    err = OTBind(ep, NULL, NULL); /* OpenTransport always picks our address */

    if (err) {
	ret->error = err;
	return (Socket) ret;
    }

    /*
     * Connect to remote address.
     */

    /* XXX Try non-primary addresses */
    OTInitInetAddress(&dest, port, addr->hostinfo.addrs[0]);

    memset(&connectCall, 0, sizeof(TCall));
    connectCall.addr.buf = (UInt8 *) &dest;
    connectCall.addr.len = sizeof(dest);

    err = OTConnect(ep, &connectCall, nil);
  
    if (err) {
	ret->error = err;
	return (Socket) ret;
    } else {
	ret->connected = 1;
	ret->writable = 1;
    }

    /* Add this to the list of all sockets */
    ret->next = ot.socklist;
    ret->prev = &ot.socklist;
    if (ret->next != NULL)
	ret->next->prev = &ret->next;
    ot.socklist = ret;

    return (Socket) ret;
}
    
Socket ot_newlistener(char *foobar, int port, Plug plug, int local_host_only)
{
    Actual_Socket s;

    return (Socket) s;
}

static void ot_tcp_close(Socket sock)
{
    Actual_Socket s = (Actual_Socket) sock;
    
    OTCloseProvider(s->ep);

    /* Unhitch from list of sockets */
    *s->prev = s->next;
    if (s->next != NULL)
	s->next->prev = s->prev;

    sfree(s);
}

static void try_send(Actual_Socket s)
{
    while (bufchain_size(&s->output_data) > 0) {
	int nsent;
	void *data;
	int len;

	/* Don't care about oob right now */

	bufchain_prefix(&s->output_data, &data, &len);

	nsent = OTSnd(s->ep, data, len, 0);
	noise_ultralight(nsent);

	if (nsent <= 0) {
	    /* something bad happened, hey ho */
	} else {
	    /* still don't care about oob */
	    bufchain_consume(&s->output_data, nsent);
	}
    }
}

static int ot_tcp_write(Socket sock, char const *buf, int len)
{
    Actual_Socket s = (Actual_Socket) sock;

    bufchain_add(&s->output_data, buf, len);

    if (s->writable)
	try_send(s);
    return bufchain_size(&s->output_data);
}

static int ot_tcp_write_oob(Socket sock, char const *buf, int len)
{
    /* Don't care about oob */
    return 0;
}


/*
 * Each socket abstraction contains a `void *' private field in
 * which the client can keep state.
 */
static void ot_tcp_set_private_ptr(Socket sock, void *ptr)
{
    Actual_Socket s = (Actual_Socket) sock;
    s->private_ptr = ptr;
}

static void *ot_tcp_get_private_ptr(Socket sock)
{
    Actual_Socket s = (Actual_Socket) sock;
    return s->private_ptr;
}


/*
 * Special error values are returned from ot_namelookup and ot_new
 * if there's a problem. These functions extract an error message,
 * or return NULL if there's no problem.
 */
char *ot_addr_error(SockAddr addr)
{
    static char buf[128];

    if (addr->error == kOTNoError)
	return NULL;
    sprintf(buf, "error %d", addr->error);
    return buf;
}
static char *ot_tcp_socket_error(Socket sock)
{
    Actual_Socket s = (Actual_Socket) sock;
    static char buf[128];

    if (s->error == kOTNoError)
	return NULL;
    sprintf(buf, "error %d", s->error);
    return buf;
}

static void ot_tcp_set_frozen(Socket sock, int is_frozen)
{
    Actual_Socket s = (Actual_Socket) sock;

    if (s->frozen == is_frozen)
	return;
    s->frozen = is_frozen;
}

/*
 * Poll all our sockets from an event loop
 */

void ot_poll(void)
{
    Actual_Socket s;
    OTResult o;

    for (s = ot.socklist; s != NULL; s = s->next) {
	o = OTLook(s->ep);

	switch(o) {
	  case T_DATA: /* Normal Data */
	    ot_recv(s);
	    break;
	  case T_EXDATA: /* Expedited Data (urgent?) */
	    ot_recv(s);
	    break;
	}
    }
}

void ot_recv(Actual_Socket s)
{
    OTResult o;
    char buf[20480];
    OTFlags flags;

    if (s->frozen) return;

    do {
	o = OTRcv(s->ep, buf, sizeof(buf), &flags);
	if (o > 0)
	    plug_receive(s->plug, 0, buf, sizeof(buf));
	if (o < 0 && o != kOTNoDataErr)
	    plug_closing(s->plug, NULL, 0, 0); /* XXX Error msg */
    } while (o > 0);
}


/*
 * Local Variables:
 * c-file-style: "simon"
 * End:
 */
Commit	Line	Data
27a3458f	1	/*
	2	* Macintosh OpenTransport networking abstraction
	3	*/
	4
	5	#include <OpenTransport.h>
	6	#include <OpenTptInternet.h>
	7
40d38714	8	#include <string.h>
40d38714	9
27a3458f	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... */
b1234a5c	18	OSStatus error;
27a3458f	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 {
6f81f628	42	int resolved;
b1234a5c	43	OSStatus error;
6f81f628	44	InetHostInfo hostinfo;
6f81f628	45	char hostname[512];
27a3458f	46	};
	47
	48	/* Globals */
	49
	50	static struct {
	51	Actual_Socket socklist;
6f81f628	52	InetSvcRef inetsvc;
27a3458f	53	} ot;
	54
	55	OSErr ot_init(void)
	56	{
6f81f628	57	OSStatus err;
	58
	59	err = InitOpenTransport();
	60	if (err != kOTNoError) return err;
	61	ot.inetsvc = OTOpenInternetServices(kDefaultInternetServicesPath, 0, &err);
	62	return err;
27a3458f	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
27a3458f	77	SockAddr ot_namelookup(char host, char *canonicalname)
	78	{
	79	SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
6f81f628	80	char *realhost;
27a3458f	81
6f81f628	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);
27a3458f	91	return ret;
	92	}
	93
	94	SockAddr ot_nonamelookup(char *host)
	95	{
	96	SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
	97
6f81f628	98	ret->resolved = FALSE;
	99	ret->error = kOTNoError;
	100	ret->hostname[0] = '\0';
	101	strncat(ret->hostname, host, lenof(ret->hostname) - 1);
27a3458f	102	return ret;
	103	}
	104
	105	void ot_getaddr(SockAddr addr, char *buf, int buflen)
	106	{
6f81f628	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);
27a3458f	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	{
6f81f628	128	int i;
27a3458f	129
6f81f628	130	if (addr->resolved)
	131	for (i = 0; i < kMaxHostAddrs; i++)
	132	if (addr->hostinfo.addrs[i] & 0xff000000 == 0x7f000000)
	133	return TRUE;
27a3458f	134	return FALSE;
	135	}
	136
	137	int ot_addrtype(SockAddr addr)
	138	{
6f81f628	139
	140	if (addr->resolved)
	141	return ADDRTYPE_IPV4;
	142	return ADDRTYPE_NAME;
27a3458f	143	}
	144
	145	void ot_addrcopy(SockAddr addr, char *buf)
	146	{
6f81f628	147
	148	/* XXX only return first address */
	149	memcpy(buf, &addr->hostinfo.addrs[0], 4);
27a3458f	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;
b1234a5c	203	ret->error = kOTNoError;
27a3458f	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;
6f81f628	247	InetAddress dest;
27a3458f	248	TCall connectCall;
	249
	250	ret = smalloc(sizeof(struct Socket_tag));
	251	ret->fn = &fn_table;
b1234a5c	252	ret->error = kOTNoError;
27a3458f	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) {
b1234a5c	273	ret->error = err;
27a3458f	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) {
b1234a5c	288	ret->error = err;
27a3458f	289	return (Socket) ret;
	290	}
	291
	292	/*
	293	* Connect to remote address.
	294	*/
	295
6f81f628	296	/* XXX Try non-primary addresses */
6f81f628	297	OTInitInetAddress(&dest, port, addr->hostinfo.addrs[0]);
27a3458f	298
40d38714	299	memset(&connectCall, 0, sizeof(TCall));
6f81f628	300	connectCall.addr.buf = (UInt8 *) &dest;
6f81f628	301	connectCall.addr.len = sizeof(dest);
27a3458f	302
	303	err = OTConnect(ep, &connectCall, nil);
	304
	305	if (err) {
b1234a5c	306	ret->error = err;
27a3458f	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;
b89053c0	316	if (ret->next != NULL)
b89053c0	317	ret->next->prev = &ret->next;
27a3458f	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	{
b1234a5c	409	static char buf[128];
	410
	411	if (addr->error == kOTNoError)
	412	return NULL;
	413	sprintf(buf, "error %d", addr->error);
	414	return buf;
27a3458f	415	}
	416	static char *ot_tcp_socket_error(Socket sock)
	417	{
	418	Actual_Socket s = (Actual_Socket) sock;
b1234a5c	419	static char buf[128];
	420
	421	if (s->error == kOTNoError)
	422	return NULL;
	423	sprintf(buf, "error %d", s->error);
	424	return buf;
27a3458f	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
b89053c0	467	do {
	468	o = OTRcv(s->ep, buf, sizeof(buf), &flags);
	469	if (o > 0)
	470	plug_receive(s->plug, 0, buf, sizeof(buf));
	471	if (o < 0 && o != kOTNoDataErr)
	472	plug_closing(s->plug, NULL, 0, 0); /* XXX Error msg */
	473	} while (o > 0);
27a3458f	474	}
	475
	476
	477	/*
	478	* Local Variables:
	479	* c-file-style: "simon"
	480	* End:
	481	*/