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net/slirp: Use newer slirp_*_hostxfwd API

Browse source 
libslirp provides a newer slirp_*_hostxfwd API meant for
address-agnostic forwarding instead of the is_udp parameter which is
limited to just TCP/UDP.

This paves the way for IPv6 and Unix socket support.

Signed-off-by: Nicholas Ngai <nicholas@ngai.me>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Tested-by: Breno Leitao <leitao@debian.org>
Message-Id: <20210925214820.18078-1-nicholas@ngai.me>
This commit is contained in:
Nicholas Ngai 2021-09-25 14:48:20 -07:00 committed by Samuel Thibault
parent fd87be1dad
commit 03555199b6
1 changed files with 48 additions and 14 deletions
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62
net/slirp.c
View file

@ -718,7 +718,12 @@ static SlirpState *slirp_lookup(Monitor *mon, const char *id)
void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict)
{
struct in_addr host_addr = { .s_addr = INADDR_ANY };
struct sockaddr_in host_addr = {
.sin_family = AF_INET,
.sin_addr = {
.s_addr = INADDR_ANY,
},
};
int host_port;
char buf[256];
const char *src_str, *p;
@ -755,15 +760,21 @@ void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict)
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
goto fail_syntax;
}
if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
if (buf[0] != '\0' && !inet_aton(buf, &host_addr.sin_addr)) {
goto fail_syntax;
}
if (qemu_strtoi(p, NULL, 10, &host_port)) {
goto fail_syntax;
}
host_addr.sin_port = htons(host_port);
err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port);
#if SLIRP_CHECK_VERSION(4, 5, 0)
err = slirp_remove_hostxfwd(s->slirp, (struct sockaddr *) &host_addr,
sizeof(host_addr), is_udp ? SLIRP_HOSTFWD_UDP : 0);
#else
err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr.sin_addr, host_port);
#endif
monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
err ? "not found" : "removed");
@ -775,13 +786,24 @@ void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict)
static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp)
{
struct in_addr host_addr = { .s_addr = INADDR_ANY };
struct in_addr guest_addr = { .s_addr = 0 };
struct sockaddr_in host_addr = {
.sin_family = AF_INET,
.sin_addr = {
.s_addr = INADDR_ANY,
},
};
struct sockaddr_in guest_addr = {
.sin_family = AF_INET,
.sin_addr = {
.s_addr = 0,
},
};
int err;
int host_port, guest_port;
const char *p;
char buf[256];
int is_udp;
char *end;
const char *end;
const char *fail_reason = "Unknown reason";
p = redir_str;
@ -802,7 +824,7 @@ static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp)
fail_reason = "Missing : separator";
goto fail_syntax;
}
if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
if (buf[0] != '\0' && !inet_aton(buf, &host_addr.sin_addr)) {
fail_reason = "Bad host address";
goto fail_syntax;
}
@ -811,29 +833,41 @@ static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp)
fail_reason = "Bad host port separator";
goto fail_syntax;
}
host_port = strtol(buf, &end, 0);
if (*end != '\0' || host_port < 0 || host_port > 65535) {
err = qemu_strtoi(buf, &end, 0, &host_port);
if (err || host_port < 0 || host_port > 65535) {
fail_reason = "Bad host port";
goto fail_syntax;
}
host_addr.sin_port = htons(host_port);
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
fail_reason = "Missing guest address";
goto fail_syntax;
}
if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
if (buf[0] != '\0' && !inet_aton(buf, &guest_addr.sin_addr)) {
fail_reason = "Bad guest address";
goto fail_syntax;
}
guest_port = strtol(p, &end, 0);
if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
err = qemu_strtoi(p, &end, 0, &guest_port);
if (err || guest_port < 1 || guest_port > 65535) {
fail_reason = "Bad guest port";
goto fail_syntax;
}
guest_addr.sin_port = htons(guest_port);
if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
guest_port) < 0) {
#if SLIRP_CHECK_VERSION(4, 5, 0)
err = slirp_add_hostxfwd(s->slirp,
(struct sockaddr *) &host_addr, sizeof(host_addr),
(struct sockaddr *) &guest_addr, sizeof(guest_addr),
is_udp ? SLIRP_HOSTFWD_UDP : 0);
#else
err = slirp_add_hostfwd(s->slirp, is_udp,
host_addr.sin_addr, host_port,
guest_addr.sin_addr, guest_port);
#endif
if (err < 0) {
error_setg(errp, "Could not set up host forwarding rule '%s'",
redir_str);
return -1;