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/*
* uhttpd - Tiny single-threaded httpd
*
* Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
*
* Permission to use, copy, modify, and/or 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 <signal.h>
#include "uhttpd.h"
void uh_relay_free(struct relay *r)
{
if (!r->cl)
return;
if (r->proc.pending)
kill(r->proc.pid, SIGKILL);
uloop_timeout_cancel(&r->timeout);
uloop_process_delete(&r->proc);
ustream_free(&r->sfd.stream);
close(r->sfd.fd.fd);
r->cl = NULL;
}
void uh_relay_close(struct relay *r, int ret)
{
struct ustream *us = &r->sfd.stream;
if (!us->notify_read)
return;
us->notify_read = NULL;
us->notify_write = NULL;
us->notify_state = NULL;
if (r->close)
r->close(r, ret);
}
static void relay_error(struct relay *r)
{
struct ustream *s = &r->sfd.stream;
int len;
r->error = true;
s->eof = true;
ustream_get_read_buf(s, &len);
if (len)
ustream_consume(s, len);
ustream_state_change(s);
}
static void relay_process_headers(struct relay *r)
{
struct ustream *s = &r->sfd.stream;
char *buf, *newline;
int len;
if (!r->header_cb)
return;
while (r->header_cb) {
int line_len;
char *val;
buf = ustream_get_read_buf(s, &len);
if (!buf || !len)
break;
newline = strchr(buf, '\n');
if (!newline)
break;
line_len = newline + 1 - buf;
if (newline > buf && newline[-1] == '\r')
newline--;
*newline = 0;
if (newline == buf) {
r->header_cb = NULL;
if (r->header_end)
r->header_end(r);
ustream_consume(s, line_len);
break;
}
val = uh_split_header(buf);
if (!val) {
relay_error(r);
return;
}
r->header_cb(r, buf, val);
ustream_consume(s, line_len);
}
}
static void relay_read_cb(struct ustream *s, int bytes)
{
struct relay *r = container_of(s, struct relay, sfd.stream);
struct client *cl = r->cl;
struct ustream *us = cl->us;
char *buf;
int len;
if (r->process_done)
uloop_timeout_set(&r->timeout, 1);
if (!r->error)
relay_process_headers(r);
if (r->header_cb) {
/*
* if eof, ensure that remaining data is discarded, so the
* state change cb will tear down the stream
*/
if (s->eof)
relay_error(r);
return;
}
if (!s->eof && ustream_pending_data(us, true)) {
ustream_set_read_blocked(s, true);
return;
}
buf = ustream_get_read_buf(s, &len);
if (!buf || !len)
return;
if (!r->skip_data)
uh_chunk_write(cl, buf, len);
ustream_consume(s, len);
}
static void relay_close_if_done(struct uloop_timeout *timeout)
{
struct relay *r = container_of(timeout, struct relay, timeout);
struct ustream *s = &r->sfd.stream;
while (ustream_poll(&r->sfd.stream));
if (!(r->process_done || s->eof) || (ustream_pending_data(s, false) && !r->header_cb))
return;
uh_relay_close(r, r->ret);
}
static void relay_state_cb(struct ustream *s)
{
struct relay *r = container_of(s, struct relay, sfd.stream);
if (r->process_done)
uloop_timeout_set(&r->timeout, 1);
}
static void relay_proc_cb(struct uloop_process *proc, int ret)
{
struct relay *r = container_of(proc, struct relay, proc);
r->process_done = true;
r->ret = ret;
uloop_timeout_set(&r->timeout, 1);
}
void uh_relay_kill(struct client *cl, struct relay *r)
{
struct ustream *us = &r->sfd.stream;
kill(r->proc.pid, SIGKILL);
us->eof = true;
ustream_state_change(us);
}
void uh_relay_open(struct client *cl, struct relay *r, int fd, int pid)
{
struct ustream *us = &r->sfd.stream;
r->cl = cl;
us->notify_read = relay_read_cb;
us->notify_state = relay_state_cb;
us->string_data = true;
ustream_fd_init(&r->sfd, fd);
r->proc.pid = pid;
r->proc.cb = relay_proc_cb;
uloop_process_add(&r->proc);
r->timeout.cb = relay_close_if_done;
}
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