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Re: [Qemu-devel] [PATCH v2] slirp: Handle whole 127.0.0.0/8 network as l
From: |
Blue Swirl |
Subject: |
Re: [Qemu-devel] [PATCH v2] slirp: Handle whole 127.0.0.0/8 network as local addresses. |
Date: |
Fri, 13 Jul 2012 15:01:14 +0000 |
On Fri, Jul 13, 2012 at 10:37 AM, Anders Waldenborg <address@hidden> wrote:
> Changes so translation of remote address to the host's ip address in
> the virtual network happens for all addresses in the 127.0.0.0/8
> network, not just 127.0.0.1.
>
> This fixes so that hostfwd bound to addresses such as 127.0.0.2 works.
>
> Signed-off-by: Anders Waldenborg <address@hidden>
> ---
>
> Thanks for the review!
>
> Patch updated according to comments.
>
> Notice that the surrounding code in tcp_subr.c uses tabs for
> indentation. Should I still use space as the coding style mandates
> (and which makes checkpatch happy)?
Yes, the goal is to get rid of tabs.
>
> slirp/main.h | 1 +
> slirp/slirp.c | 3 +++
> slirp/tcp_subr.c | 6 ++++--
> 3 files changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/slirp/main.h b/slirp/main.h
> index 028df4b..bf601e2 100644
> --- a/slirp/main.h
> +++ b/slirp/main.h
> @@ -31,6 +31,7 @@ extern char *exec_shell;
> extern u_int curtime;
> extern fd_set *global_readfds, *global_writefds, *global_xfds;
> extern struct in_addr loopback_addr;
> +extern in_addr_t loopback_mask;
> extern char *username;
> extern char *socket_path;
> extern int towrite_max;
> diff --git a/slirp/slirp.c b/slirp/slirp.c
> index 90473eb..9787104 100644
> --- a/slirp/slirp.c
> +++ b/slirp/slirp.c
> @@ -29,6 +29,8 @@
>
> /* host loopback address */
> struct in_addr loopback_addr;
> +/* host loopback network mask */
> +in_addr_t loopback_mask;
>
> /* emulated hosts use the MAC addr 52:55:IP:IP:IP:IP */
> static const uint8_t special_ethaddr[ETH_ALEN] = {
> @@ -191,6 +193,7 @@ static void slirp_init_once(void)
> #endif
>
> loopback_addr.s_addr = htonl(INADDR_LOOPBACK);
> + loopback_mask = htonl(IN_CLASSA_NET);
> }
>
> static void slirp_state_save(QEMUFile *f, void *opaque);
> diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c
> index 0a545c4..064b5e8 100644
> --- a/slirp/tcp_subr.c
> +++ b/slirp/tcp_subr.c
> @@ -435,8 +435,10 @@ tcp_connect(struct socket *inso)
> so->so_fport = addr.sin_port;
> so->so_faddr = addr.sin_addr;
> /* Translate connections from localhost to the real hostname */
> - if (so->so_faddr.s_addr == 0 || so->so_faddr.s_addr ==
> loopback_addr.s_addr)
> - so->so_faddr = slirp->vhost_addr;
> + if (so->so_faddr.s_addr == 0 ||
> + (so->so_faddr.s_addr & loopback_mask) ==
> + (loopback_addr.s_addr & loopback_mask))
Please add braces.
> + so->so_faddr = slirp->vhost_addr;
>
> /* Close the accept() socket, set right state */
> if (inso->so_state & SS_FACCEPTONCE) {
> --
> 1.7.2.5
>
>