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Add nodelay option for TCP character devices. 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2362 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2007-01-28 00:10:01 +00:00
parent e5b0bc445e
commit f749998939
2 changed files with 17 additions and 3 deletions
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7
qemu-doc.texi
View File

@ -576,13 +576,14 @@ localhost 5555
@end table
@item tcp:[host]:port[,server][,nowait]
@item tcp:[host]:port[,server][,nowait][,nodelay]
The TCP Net Console has two modes of operation. It can send the serial
I/O to a location or wait for a connection from a location. By default
the TCP Net Console is sent to @var{host} at the @var{port}. If you use
the @var{server} option QEMU will wait for a client socket application
to connect to the port before continuing, unless the @code{nowait}
option was specified. If @var{host} is omitted, 0.0.0.0 is assumed. Only
option was specified. The @code{nodelay} option disables the Nagle buffering
algoritm. If @var{host} is omitted, 0.0.0.0 is assumed. Only
one TCP connection at a time is accepted. You can use @code{telnet} to
connect to the corresponding character device.
@table @code
@ -594,7 +595,7 @@ connect to the corresponding character device.
-serial tcp:192.168.0.100:4444,server,nowait
@end table
@item telnet:host:port[,server][,nowait]
@item telnet:host:port[,server][,nowait][,nodelay]
The telnet protocol is used instead of raw tcp sockets. The options
work the same as if you had specified @code{-serial tcp}. The
difference is that the port acts like a telnet server or client using

13
vl.c
View File

@ -2497,6 +2497,12 @@ static void tcp_chr_telnet_init(int fd)
send(fd, (char *)buf, 3, 0);
}
static void socket_set_nodelay(int fd)
{
int val = 1;
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
}
static void tcp_chr_accept(void *opaque)
{
CharDriverState *chr = opaque;
@ -2530,6 +2536,8 @@ static void tcp_chr_accept(void *opaque)
}
}
socket_set_nonblock(fd);
if (s->do_nodelay)
socket_set_nodelay(fd);
s->fd = fd;
qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
tcp_chr_connect(chr);
@ -2554,6 +2562,7 @@ static CharDriverState *qemu_chr_open_tcp(const char *host_str,
int fd = -1, ret, err, val;
int is_listen = 0;
int is_waitconnect = 1;
int do_nodelay = 0;
const char *ptr;
struct sockaddr_in saddr;
#ifndef _WIN32
@ -2584,6 +2593,8 @@ static CharDriverState *qemu_chr_open_tcp(const char *host_str,
is_listen = 1;
} else if (!strncmp(ptr,"nowait",6)) {
is_waitconnect = 0;
} else if (!strncmp(ptr,"nodelay",6)) {
do_nodelay = 1;
} else {
printf("Unknown option: %s\n", ptr);
goto fail;
@ -2616,6 +2627,7 @@ static CharDriverState *qemu_chr_open_tcp(const char *host_str,
s->fd = -1;
s->listen_fd = -1;
s->is_unix = is_unix;
s->do_nodelay = do_nodelay && !is_unix;
chr->opaque = s;
chr->chr_write = tcp_chr_write;
@ -2665,6 +2677,7 @@ static CharDriverState *qemu_chr_open_tcp(const char *host_str,
}
}
s->fd = fd;
socket_set_nodelay(fd);
if (s->connected)
tcp_chr_connect(chr);
else