File: [local] / src / usr.sbin / lpd / io.c (download)
Revision 1.1, Fri Apr 27 16:14:36 2018 UTC (6 years, 1 month ago) by eric
Branch point for: MAIN
Initial revision
|
/* $OpenBSD: io.c,v 1.1 2018/04/27 16:14:36 eric Exp $ */
/*
* Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "io.h"
#include "iobuf.h"
#include "log.h"
#ifdef IO_SSL
#include <openssl/err.h>
#include <openssl/ssl.h>
#endif
enum {
IO_STATE_DOWN,
IO_STATE_UP,
IO_STATE_CONNECT,
IO_STATE_CONNECT_TLS,
IO_STATE_ACCEPT_TLS
};
#define IO_PAUSE_IN IO_IN
#define IO_PAUSE_OUT IO_OUT
#define IO_READ 0x0100
#define IO_WRITE 0x0200
#define IO_RW (IO_READ | IO_WRITE)
#define IO_RESET 0x1000
#define IO_HELD 0x2000
struct io {
int sock;
void *arg;
void (*cb)(struct io*, int, void *);
struct iobuf iobuf;
size_t lowat;
int timeout;
int flags;
int state;
struct event ev;
void *tls;
const char *error; /* only valid immediately on callback */
struct sockaddr *bind;
struct addrinfo *ai; /* for connecting */
};
static const char* io_strflags(int);
static const char* io_strevents(short);
static void io_reload(struct io *);
static void io_reset(struct io *, short, void (*)(int, short, void*));
static void io_frame_enter(const char *, struct io *, int);
static void io_frame_leave(struct io *);
static void io_hold(struct io *);
static void io_release(struct io *);
static void io_callback(struct io*, int);
static void io_dispatch(int, short, void *);
static void io_dispatch_connect(int, short, void *);
static int io_connect_next(struct io *);
#ifdef IO_SSL
void ssl_error(const char *); /* XXX external */
static const char* io_ssl_error(void);
static void io_dispatch_accept_tls(int, short, void *);
static void io_dispatch_connect_tls(int, short, void *);
static void io_dispatch_read_tls(int, short, void *);
static void io_dispatch_write_tls(int, short, void *);
static void io_reload_tls(struct io *io);
#endif
static struct io *current = NULL;
static long long unsigned frame = 0;
static int _io_trace = 0;
static const char *states[] = {
"DOWN",
"UP",
"CONNECT",
"CONNECT_TLS",
"ACCEPT_TLS"
};
#define io_debug(args...) do { if (_io_trace) log_debug(args); } while(0)
#define IO_READING(io) (((io)->flags & IO_RW) != IO_WRITE)
#define IO_WRITING(io) (((io)->flags & IO_RW) != IO_READ)
void
io_trace(int on)
{
_io_trace = on;
}
const char*
io_strio(struct io *io)
{
static char buf[128];
char ssl[128];
ssl[0] = '\0';
#ifdef IO_SSL
if (io->tls) {
(void)snprintf(ssl, sizeof ssl, " ssl=%s:%s:%d",
SSL_get_version(io->tls),
SSL_get_cipher_name(io->tls),
SSL_get_cipher_bits(io->tls, NULL));
}
#endif
(void)snprintf(buf, sizeof buf,
"<io:%p st=%s, fd=%d to=%d fl=%s%s ib=%zu ob=%zu>",
io, states[io->state], io->sock, io->timeout,
io_strflags(io->flags), ssl, io_datalen(io), io_queued(io));
return buf;
}
const char*
io_strevent(int evt)
{
static char buf[32];
switch (evt) {
case IO_CONNECTED:
return "IO_CONNECTED";
case IO_TLSREADY:
return "IO_TLSREADY";
case IO_DATAIN:
return "IO_DATAIN";
case IO_LOWAT:
return "IO_LOWAT";
case IO_CLOSED:
return "IO_CLOSED";
case IO_DISCONNECTED:
return "IO_DISCONNECTED";
case IO_TIMEOUT:
return "IO_TIMEOUT";
case IO_ERROR:
return "IO_ERROR";
case IO_TLSERROR:
return "IO_TLSERROR";
default:
(void)snprintf(buf, sizeof(buf), "IO_? %d", evt);
return buf;
}
}
struct io *
io_new(void)
{
struct io *io;
io = calloc(1, sizeof(*io));
if (io == NULL)
return NULL;
iobuf_init(&io->iobuf, 0, 0);
io->sock = -1;
io->timeout = -1;
return io;
}
void
io_free(struct io *io)
{
io_debug("%s(%p)", __func__, io);
/* the current io is virtually dead */
if (io == current)
current = NULL;
#ifdef IO_SSL
if (io->tls) {
SSL_free(io->tls);
io->tls = NULL;
}
#endif
if (io->ai)
freeaddrinfo(io->ai);
if (event_initialized(&io->ev))
event_del(&io->ev);
if (io->sock != -1) {
(void)close(io->sock);
io->sock = -1;
}
iobuf_clear(&io->iobuf);
free(io->bind);
free(io);
}
int
io_set_callback(struct io *io, void(*cb)(struct io *, int, void *), void *arg)
{
io->cb = cb;
io->arg = arg;
return 0;
}
int
io_set_bindaddr(struct io *io, const struct sockaddr *sa)
{
struct sockaddr *t;
if (io->state != IO_STATE_DOWN) {
errno = EISCONN;
return -1;
}
t = malloc(sa->sa_len);
if (t == NULL)
return -1;
memmove(t, sa, sa->sa_len);
free(io->bind);
io->bind = t;
return 0;
}
int
io_set_bufsize(struct io *io, size_t sz)
{
errno = ENOSYS;
return -1;
}
void
io_set_timeout(struct io *io, int msec)
{
io_debug("%s(%p, %d)", __func__, io, msec);
io->timeout = msec;
}
void
io_set_lowat(struct io *io, size_t lowat)
{
io_debug("%s(%p, %zu)", __func__, io, lowat);
io->lowat = lowat;
}
const char *
io_error(struct io *io)
{
const char *e;
e = io->error;
io->error = NULL;
return e;
}
int
io_fileno(struct io *io)
{
return io->sock;
}
int
io_attach(struct io *io, int sock)
{
if (io->state != IO_STATE_DOWN) {
errno = EISCONN;
return -1;
}
io->state = IO_STATE_UP;
io->sock = sock;
io_reload(io);
return 0;
}
int
io_detach(struct io *io)
{
errno = ENOSYS;
return -1;
}
int
io_close(struct io *io)
{
errno = ENOSYS;
return -1;
}
int
io_connect(struct io *io, struct addrinfo *ai)
{
if (ai == NULL) {
errno = EINVAL;
fatal("%s", __func__);
return -1;
}
if (io->state != IO_STATE_DOWN) {
freeaddrinfo(ai);
errno = EISCONN;
fatal("%s", __func__);
return -1;
}
io->ai = ai;
return io_connect_next(io);
}
int
io_disconnect(struct io *io)
{
errno = ENOSYS;
fatal("%s", __func__);
return -1;
}
int
io_starttls(struct io *io, void *ssl)
{
#ifdef IO_SSL
int mode;
mode = io->flags & IO_RW;
if (mode == 0 || mode == IO_RW)
fatalx("%s: full-duplex or unset", __func__);
if (io->tls)
fatalx("%s: SSL already started", __func__);
io->tls = ssl;
if (SSL_set_fd(io->tls, io->sock) == 0) {
ssl_error("io_start_tls:SSL_set_fd");
return -1;
}
if (mode == IO_WRITE) {
io->state = IO_STATE_CONNECT_TLS;
SSL_set_connect_state(io->tls);
io_reset(io, EV_WRITE, io_dispatch_connect_tls);
} else {
io->state = IO_STATE_ACCEPT_TLS;
SSL_set_accept_state(io->tls);
io_reset(io, EV_READ, io_dispatch_accept_tls);
}
return 0;
#else
errno = ENOSYS;
return -1;
#endif
}
void
io_pause(struct io *io, int dir)
{
io_debug("%s(%p, %x)", __func__, io, dir);
io->flags |= dir & (IO_IN | IO_OUT);
io_reload(io);
}
void
io_resume(struct io *io, int dir)
{
io_debug("%s(%p, %x)", __func__, io, dir);
io->flags &= ~(dir & (IO_IN | IO_OUT));
io_reload(io);
}
void
io_set_read(struct io *io)
{
int mode;
io_debug("%s(%p)", __func__, io);
mode = io->flags & IO_RW;
if (!(mode == 0 || mode == IO_WRITE))
fatalx("%s: full-duplex or reading", __func__);
io->flags &= ~IO_RW;
io->flags |= IO_READ;
io_reload(io);
}
void
io_set_write(struct io *io)
{
int mode;
io_debug("%s(%p)", __func__, io);
mode = io->flags & IO_RW;
if (!(mode == 0 || mode == IO_READ))
fatalx("%s: full-duplex or writing", __func__);
io->flags &= ~IO_RW;
io->flags |= IO_WRITE;
io_reload(io);
}
int
io_write(struct io *io, const void *buf, size_t len)
{
int r;
r = iobuf_queue(&io->iobuf, buf, len);
io_reload(io);
return r;
}
int
io_writev(struct io *io, const struct iovec *iov, int iovcount)
{
int r;
r = iobuf_queuev(&io->iobuf, iov, iovcount);
io_reload(io);
return r;
}
int
io_print(struct io *io, const char *s)
{
return io_write(io, s, strlen(s));
}
int
io_printf(struct io *io, const char *fmt, ...)
{
va_list ap;
int r;
va_start(ap, fmt);
r = io_vprintf(io, fmt, ap);
va_end(ap);
return r;
}
int
io_vprintf(struct io *io, const char *fmt, va_list ap)
{
char *buf;
int len;
len = vasprintf(&buf, fmt, ap);
if (len == -1)
return -1;
len = io_write(io, buf, len);
free(buf);
return len;
}
size_t
io_queued(struct io *io)
{
return iobuf_queued(&io->iobuf);
}
void *
io_data(struct io *io)
{
return iobuf_data(&io->iobuf);
}
size_t
io_datalen(struct io *io)
{
return iobuf_len(&io->iobuf);
}
char *
io_getline(struct io *io, size_t *sz)
{
return iobuf_getline(&io->iobuf, sz);
}
void
io_drop(struct io *io, size_t sz)
{
return iobuf_drop(&io->iobuf, sz);
}
const char*
io_strflags(int flags)
{
static char buf[64];
buf[0] = '\0';
switch (flags & IO_RW) {
case 0:
(void)strlcat(buf, "rw", sizeof buf);
break;
case IO_READ:
(void)strlcat(buf, "R", sizeof buf);
break;
case IO_WRITE:
(void)strlcat(buf, "W", sizeof buf);
break;
case IO_RW:
(void)strlcat(buf, "RW", sizeof buf);
break;
}
if (flags & IO_PAUSE_IN)
(void)strlcat(buf, ",F_PI", sizeof buf);
if (flags & IO_PAUSE_OUT)
(void)strlcat(buf, ",F_PO", sizeof buf);
return buf;
}
const char*
io_strevents(short ev)
{
static char buf[64];
char buf2[16];
int n;
n = 0;
buf[0] = '\0';
if (ev == 0) {
(void)strlcat(buf, "<NONE>", sizeof(buf));
return buf;
}
if (ev & EV_TIMEOUT) {
(void)strlcat(buf, "EV_TIMEOUT", sizeof(buf));
ev &= ~EV_TIMEOUT;
n++;
}
if (ev & EV_READ) {
if (n)
(void)strlcat(buf, "|", sizeof(buf));
(void)strlcat(buf, "EV_READ", sizeof(buf));
ev &= ~EV_READ;
n++;
}
if (ev & EV_WRITE) {
if (n)
(void)strlcat(buf, "|", sizeof(buf));
(void)strlcat(buf, "EV_WRITE", sizeof(buf));
ev &= ~EV_WRITE;
n++;
}
if (ev & EV_SIGNAL) {
if (n)
(void)strlcat(buf, "|", sizeof(buf));
(void)strlcat(buf, "EV_SIGNAL", sizeof(buf));
ev &= ~EV_SIGNAL;
n++;
}
if (ev) {
if (n)
(void)strlcat(buf, "|", sizeof(buf));
(void)strlcat(buf, "EV_?=0x", sizeof(buf));
(void)snprintf(buf2, sizeof(buf2), "%hx", ev);
(void)strlcat(buf, buf2, sizeof(buf));
}
return buf;
}
/*
* Setup the necessary events as required by the current io state,
* honouring duplex mode and i/o pause.
*/
static void
io_reload(struct io *io)
{
short events;
/* The io will be reloaded at release time. */
if (io->flags & IO_HELD)
return;
/* Do nothing if no socket. */
if (io->sock == -1)
return;
#ifdef IO_SSL
if (io->tls) {
io_reload_tls(io);
return;
}
#endif
io_debug("%s(%p)", __func__, io);
events = 0;
if (IO_READING(io) && !(io->flags & IO_PAUSE_IN))
events = EV_READ;
if (IO_WRITING(io) && !(io->flags & IO_PAUSE_OUT) && io_queued(io))
events |= EV_WRITE;
io_reset(io, events, io_dispatch);
}
static void
io_reset(struct io *io, short events, void (*dispatch)(int, short, void*))
{
struct timeval tv, *ptv;
io_debug("%s(%p, %s, %p) -> %s", __func__, io,
io_strevents(events), dispatch, io_strio(io));
/*
* Indicate that the event has already been reset so that reload
* is not called on frame_leave.
*/
io->flags |= IO_RESET;
if (event_initialized(&io->ev))
event_del(&io->ev);
/*
* The io is paused by the user, so we don't want the timeout to be
* effective.
*/
if (events == 0)
return;
event_set(&io->ev, io->sock, events, dispatch, io);
if (io->timeout >= 0) {
tv.tv_sec = io->timeout / 1000;
tv.tv_usec = (io->timeout % 1000) * 1000;
ptv = &tv;
} else
ptv = NULL;
event_add(&io->ev, ptv);
}
static void
io_frame_enter(const char *where, struct io *io, int ev)
{
io_debug("io: BEGIN %llu", frame);
io_debug("%s(%s, %s, %s)", __func__, where, io_strevents(ev),
io_strio(io));
if (current)
fatalx("%s: interleaved frames", __func__);
current = io;
io_hold(io);
}
static void
io_frame_leave(struct io *io)
{
io_debug("%s(%llu)", __func__, frame);
if (current && current != io)
fatalx("%s: io mismatch", __func__);
/* The io has been cleared. */
if (current == NULL)
goto done;
/*
* TODO: There is a possible optimization there:
* In a typical half-duplex request/response scenario,
* the io is waiting to read a request, and when done, it queues
* the response in the output buffer and goes to write mode.
* There, the write event is set and will be triggered in the next
* event frame. In most case, the write call could be done
* immediately as part of the last read frame, thus avoiding to go
* through the event loop machinery. So, as an optimisation, we
* could detect that case here and force an event dispatching.
*/
/* Reload the io if it has not been reset already. */
io_release(io);
current = NULL;
done:
io_debug("io: END %llu", frame);
frame += 1;
}
static void
io_hold(struct io *io)
{
io_debug("%s(%p)", __func__, io);
if (io->flags & IO_HELD)
fatalx("%s: already held", __func__);
io->flags &= ~IO_RESET;
io->flags |= IO_HELD;
}
static void
io_release(struct io *io)
{
io_debug("%s(%p)", __func__, io);
if (!(io->flags & IO_HELD))
fatalx("%s: not held", __func__);
io->flags &= ~IO_HELD;
if (!(io->flags & IO_RESET))
io_reload(io);
}
static void
io_callback(struct io *io, int evt)
{
io_debug("%s(%s, %s)", __func__, io_strio(io), io_strevent(evt));
io->cb(io, evt, io->arg);
}
static void
io_dispatch(int fd, short ev, void *arg)
{
struct io *io = arg;
size_t w;
ssize_t n;
int saved_errno;
io_frame_enter(__func__, io, ev);
if (ev == EV_TIMEOUT) {
io_callback(io, IO_TIMEOUT);
goto leave;
}
if (ev & EV_WRITE && (w = io_queued(io))) {
if ((n = iobuf_write(&io->iobuf, io->sock)) < 0) {
if (n == IOBUF_WANT_WRITE) /* kqueue bug? */
goto read;
if (n == IOBUF_CLOSED)
io_callback(io, IO_DISCONNECTED);
else {
log_warn("%s: iobuf_write", __func__);
saved_errno = errno;
io->error = strerror(errno);
errno = saved_errno;
io_callback(io, IO_ERROR);
}
goto leave;
}
if (w > io->lowat && w - n <= io->lowat)
io_callback(io, IO_LOWAT);
}
read:
if (ev & EV_READ) {
iobuf_normalize(&io->iobuf);
if ((n = iobuf_read(&io->iobuf, io->sock)) < 0) {
if (n == IOBUF_CLOSED)
io_callback(io, IO_DISCONNECTED);
else {
log_warn("%s: iobuf_read", __func__);
saved_errno = errno;
io->error = strerror(errno);
errno = saved_errno;
io_callback(io, IO_ERROR);
}
goto leave;
}
if (n)
io_callback(io, IO_DATAIN);
}
leave:
io_frame_leave(io);
}
static void
io_dispatch_connect(int fd, short ev, void *arg)
{
struct io *io = arg;
socklen_t sl;
int r, e;
io_frame_enter(__func__, io, ev);
if (ev == EV_TIMEOUT)
e = ETIMEDOUT;
else {
sl = sizeof(e);
r = getsockopt(fd, SOL_SOCKET, SO_ERROR, &e, &sl);
if (r == -1) {
log_warn("%s: getsockopt", __func__);
e = errno;
}
else if (e) {
errno = e;
log_warn("%s: (connect)", __func__);
}
}
if (e == 0) {
io->state = IO_STATE_UP;
io_callback(io, IO_CONNECTED);
goto done;
}
while (io->ai) {
r = io_connect_next(io);
if (r == 0)
goto done;
e = errno;
}
(void)close(fd);
io->sock = -1;
io->error = strerror(e);
io->state = IO_STATE_DOWN;
io_callback(io, e == ETIMEDOUT ? IO_TIMEOUT : IO_ERROR);
done:
io_frame_leave(io);
}
static int
io_connect_next(struct io *io)
{
struct addrinfo *ai;
struct linger l;
int saved_errno;
while ((ai = io->ai)) {
io->ai = ai->ai_next;
ai->ai_next = NULL;
if (ai->ai_socktype == SOCK_STREAM)
break;
freeaddrinfo(ai);
}
if (ai == NULL) {
errno = ESOCKTNOSUPPORT;
log_warn("%s", __func__);
return -1;
}
if ((io->sock = socket(ai->ai_family, ai->ai_socktype | SOCK_NONBLOCK,
0)) == -1) {
log_warn("%s: socket", __func__);
goto fail;
}
memset(&l, 0, sizeof(l));
if (setsockopt(io->sock, SOL_SOCKET, SO_LINGER, &l, sizeof(l)) == -1) {
log_warn("%s: setsockopt", __func__);
goto fail;
}
if (io->bind && bind(io->sock, io->bind, io->bind->sa_len) == -1) {
log_warn("%s: bind", __func__);
goto fail;
}
if (connect(io->sock, ai->ai_addr, ai->ai_addr->sa_len) == -1)
if (errno != EINPROGRESS) {
log_warn("%s: connect", __func__);
goto fail;
}
freeaddrinfo(ai);
io->state = IO_STATE_CONNECT;
io_reset(io, EV_WRITE, io_dispatch_connect);
return 0;
fail:
if (io->sock != -1) {
saved_errno = errno;
close(io->sock);
errno = saved_errno;
io->error = strerror(errno);
io->sock = -1;
}
freeaddrinfo(ai);
if (io->ai) {
freeaddrinfo(io->ai);
io->ai = NULL;
}
return -1;
}
#ifdef IO_SSL
static const char*
io_ssl_error(void)
{
static char buf[128];
unsigned long e;
e = ERR_peek_last_error();
if (e) {
ERR_error_string(e, buf);
return buf;
}
return "No SSL error";
}
static void
io_dispatch_accept_tls(int fd, short event, void *arg)
{
struct io *io = arg;
int e, ret;
io_frame_enter(__func__, io, event);
if (event == EV_TIMEOUT) {
io_callback(io, IO_TIMEOUT);
goto leave;
}
if ((ret = SSL_accept(io->tls)) > 0) {
io->state = IO_STATE_UP;
io_callback(io, IO_TLSREADY);
goto leave;
}
switch ((e = SSL_get_error(io->tls, ret))) {
case SSL_ERROR_WANT_READ:
io_reset(io, EV_READ, io_dispatch_accept_tls);
break;
case SSL_ERROR_WANT_WRITE:
io_reset(io, EV_WRITE, io_dispatch_accept_tls);
break;
default:
io->error = io_ssl_error();
ssl_error("io_dispatch_accept_tls:SSL_accept");
io_callback(io, IO_TLSERROR);
break;
}
leave:
io_frame_leave(io);
}
static void
io_dispatch_connect_tls(int fd, short event, void *arg)
{
struct io *io = arg;
int e, ret;
io_frame_enter(__func__, io, event);
if (event == EV_TIMEOUT) {
io_callback(io, IO_TIMEOUT);
goto leave;
}
if ((ret = SSL_connect(io->tls)) > 0) {
io->state = IO_STATE_UP;
io_callback(io, IO_TLSREADY);
goto leave;
}
switch ((e = SSL_get_error(io->tls, ret))) {
case SSL_ERROR_WANT_READ:
io_reset(io, EV_READ, io_dispatch_connect_tls);
break;
case SSL_ERROR_WANT_WRITE:
io_reset(io, EV_WRITE, io_dispatch_connect_tls);
break;
default:
io->error = io_ssl_error();
ssl_error("io_dispatch_connect_tls:SSL_connect");
io_callback(io, IO_TLSERROR);
break;
}
leave:
io_frame_leave(io);
}
static void
io_dispatch_read_tls(int fd, short event, void *arg)
{
struct io *io = arg;
int n, saved_errno;
io_frame_enter(__func__, io, event);
if (event == EV_TIMEOUT) {
io_callback(io, IO_TIMEOUT);
goto leave;
}
again:
iobuf_normalize(&io->iobuf);
switch ((n = iobuf_read_ssl(&io->iobuf, (SSL*)io->tls))) {
case IOBUF_WANT_READ:
io_reset(io, EV_READ, io_dispatch_read_tls);
break;
case IOBUF_WANT_WRITE:
io_reset(io, EV_WRITE, io_dispatch_read_tls);
break;
case IOBUF_CLOSED:
io_callback(io, IO_DISCONNECTED);
break;
case IOBUF_ERROR:
saved_errno = errno;
io->error = strerror(errno);
errno = saved_errno;
log_warn("%s: iobuf_read_ssl", __func__);
io_callback(io, IO_ERROR);
break;
case IOBUF_SSLERROR:
io->error = io_ssl_error();
ssl_error("io_dispatch_read_tls:SSL_read");
io_callback(io, IO_TLSERROR);
break;
default:
io_debug("%s(...) -> r=%d", __func__, n);
io_callback(io, IO_DATAIN);
if (current == io && IO_READING(io) && SSL_pending(io->tls))
goto again;
}
leave:
io_frame_leave(io);
}
static void
io_dispatch_write_tls(int fd, short event, void *arg)
{
struct io *io = arg;
size_t w2, w;
int n, saved_errno;
io_frame_enter(__func__, io, event);
if (event == EV_TIMEOUT) {
io_callback(io, IO_TIMEOUT);
goto leave;
}
w = io_queued(io);
switch ((n = iobuf_write_ssl(&io->iobuf, (SSL*)io->tls))) {
case IOBUF_WANT_READ:
io_reset(io, EV_READ, io_dispatch_write_tls);
break;
case IOBUF_WANT_WRITE:
io_reset(io, EV_WRITE, io_dispatch_write_tls);
break;
case IOBUF_CLOSED:
io_callback(io, IO_DISCONNECTED);
break;
case IOBUF_ERROR:
saved_errno = errno;
io->error = strerror(errno);
errno = saved_errno;
log_warn("%s: iobuf_write_ssl", __func__);
io_callback(io, IO_ERROR);
break;
case IOBUF_SSLERROR:
io->error = io_ssl_error();
ssl_error("io_dispatch_write_tls:SSL_write");
io_callback(io, IO_TLSERROR);
break;
default:
io_debug("%s(...) -> w=%d", __func__, n);
w2 = io_queued(io);
if (w > io->lowat && w2 <= io->lowat)
io_callback(io, IO_LOWAT);
break;
}
leave:
io_frame_leave(io);
}
static void
io_reload_tls(struct io *io)
{
short ev = 0;
void (*dispatch)(int, short, void*) = NULL;
switch (io->state) {
case IO_STATE_CONNECT_TLS:
ev = EV_WRITE;
dispatch = io_dispatch_connect_tls;
break;
case IO_STATE_ACCEPT_TLS:
ev = EV_READ;
dispatch = io_dispatch_accept_tls;
break;
case IO_STATE_UP:
ev = 0;
if (IO_READING(io) && !(io->flags & IO_PAUSE_IN)) {
ev = EV_READ;
dispatch = io_dispatch_read_tls;
}
else if (IO_WRITING(io) && !(io->flags & IO_PAUSE_OUT) &&
io_queued(io)) {
ev = EV_WRITE;
dispatch = io_dispatch_write_tls;
}
if (!ev)
return; /* paused */
break;
default:
fatalx("%s: unexpected state %d", __func__, io->state);
}
io_reset(io, ev, dispatch);
}
#endif /* IO_SSL */