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Extensive changes that _should_ fix the socket buffering problems,

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by ceasing to listen on input channels if the corresponding output
channel isn't accepting data. Has had basic check-I-didn't-actually-
break-anything-too-badly testing, but hasn't been genuinely tested
in stress conditions (because concocting stress conditions is non-
trivial).

[originally from svn r1198]
This commit is contained in:
Simon Tatham
2001-08-25 17:09:23 +00:00
parent 7ff3999e49
commit c87fa98d09
17 changed files with 929 additions and 259 deletions
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27
raw.c
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@ -11,13 +11,17 @@
#define TRUE 1
#endif
#define RAW_MAX_BACKLOG 4096
static Socket s = NULL;
static int raw_bufsize;
static void raw_size(void);
static void c_write(char *buf, int len)
{
from_backend(0, buf, len);
int backlog = from_backend(0, buf, len);
sk_set_frozen(s, backlog > RAW_MAX_BACKLOG);
}
static int raw_closing(Plug plug, char *error_msg, int error_code,
@ -83,13 +87,23 @@ static char *raw_init(char *host, int port, char **realhost)
/*
* Called to send data down the raw connection.
*/
static void raw_send(char *buf, int len)
static int raw_send(char *buf, int len)
{
if (s == NULL)
return;
sk_write(s, buf, len);
raw_bufsize = sk_write(s, buf, len);
return raw_bufsize;
}
/*
* Called to query the current socket sendability status.
*/
static int raw_sendbuffer(void)
{
return raw_bufsize;
}
/*
@ -120,6 +134,11 @@ static int raw_sendok(void)
return 1;
}
static void raw_unthrottle(int backlog)
{
sk_set_frozen(s, backlog > RAW_MAX_BACKLOG);
}
static int raw_ldisc(int option)
{
if (option == LD_EDIT || option == LD_ECHO)
@ -130,10 +149,12 @@ static int raw_ldisc(int option)
Backend raw_backend = {
raw_init,
raw_send,
raw_sendbuffer,
raw_size,
raw_special,
raw_socket,
raw_sendok,
raw_ldisc,
raw_unthrottle,
1
};