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path: root/tcp.c
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Diffstat (limited to 'tcp.c')
-rw-r--r--tcp.c132
1 files changed, 88 insertions, 44 deletions
diff --git a/tcp.c b/tcp.c
index 35fca31..306f928 100644
--- a/tcp.c
+++ b/tcp.c
@@ -2987,15 +2987,15 @@ void tcp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
/**
* tcp_sock_init4() - Initialise listening sockets for a given IPv4 port
* @c: Execution context
- * @ns: In pasta mode, if set, bind with loopback address in namespace
* @addr: Pointer to address for binding, NULL if not configured
* @ifname: Name of interface to bind to, NULL if not configured
* @port: Port, host order
*/
-static void tcp_sock_init4(const struct ctx *c, int ns, const struct in_addr *addr,
+static void tcp_sock_init4(const struct ctx *c, const struct in_addr *addr,
const char *ifname, in_port_t port)
{
- union tcp_epoll_ref tref = { .tcp.listen = 1, .tcp.outbound = ns };
+ in_port_t idx = port + c->tcp.fwd_in.delta[port];
+ union tcp_epoll_ref tref = { .tcp.listen = 1, .tcp.index = idx };
bool spliced = false, tap = true;
int s;
@@ -3006,14 +3006,9 @@ static void tcp_sock_init4(const struct ctx *c, int ns, const struct in_addr *ad
if (!addr)
addr = &c->ip4.addr;
- tap = !ns && !IN4_IS_ADDR_LOOPBACK(addr);
+ tap = !IN4_IS_ADDR_LOOPBACK(addr);
}
- if (ns)
- tref.tcp.index = (in_port_t)(port + c->tcp.fwd_out.delta[port]);
- else
- tref.tcp.index = (in_port_t)(port + c->tcp.fwd_in.delta[port]);
-
if (tap) {
s = sock_l4(c, AF_INET, IPPROTO_TCP, addr, ifname, port,
tref.u32);
@@ -3039,29 +3034,25 @@ static void tcp_sock_init4(const struct ctx *c, int ns, const struct in_addr *ad
else
s = -1;
- if (c->tcp.fwd_out.mode == FWD_AUTO) {
- if (ns)
- tcp_sock_ns[port][V4] = s;
- else
- tcp_sock_init_lo[port][V4] = s;
- }
+ if (c->tcp.fwd_out.mode == FWD_AUTO)
+ tcp_sock_init_lo[port][V4] = s;
}
}
/**
* tcp_sock_init6() - Initialise listening sockets for a given IPv6 port
* @c: Execution context
- * @ns: In pasta mode, if set, bind with loopback address in namespace
* @addr: Pointer to address for binding, NULL if not configured
* @ifname: Name of interface to bind to, NULL if not configured
* @port: Port, host order
*/
-static void tcp_sock_init6(const struct ctx *c, int ns,
+static void tcp_sock_init6(const struct ctx *c,
const struct in6_addr *addr, const char *ifname,
in_port_t port)
{
- union tcp_epoll_ref tref = { .tcp.listen = 1, .tcp.outbound = ns,
- .tcp.v6 = 1 };
+ in_port_t idx = port + c->tcp.fwd_in.delta[port];
+ union tcp_epoll_ref tref = { .tcp.listen = 1, .tcp.v6 = 1,
+ .tcp.index = idx };
bool spliced = false, tap = true;
int s;
@@ -3073,14 +3064,9 @@ static void tcp_sock_init6(const struct ctx *c, int ns,
if (!addr)
addr = &c->ip6.addr;
- tap = !ns && !IN6_IS_ADDR_LOOPBACK(addr);
+ tap = !IN6_IS_ADDR_LOOPBACK(addr);
}
- if (ns)
- tref.tcp.index = (in_port_t)(port + c->tcp.fwd_out.delta[port]);
- else
- tref.tcp.index = (in_port_t)(port + c->tcp.fwd_in.delta[port]);
-
if (tap) {
s = sock_l4(c, AF_INET6, IPPROTO_TCP, addr, ifname, port,
tref.u32);
@@ -3105,40 +3091,99 @@ static void tcp_sock_init6(const struct ctx *c, int ns,
else
s = -1;
- if (c->tcp.fwd_out.mode == FWD_AUTO) {
- if (ns)
- tcp_sock_ns[port][V6] = s;
- else
- tcp_sock_init_lo[port][V6] = s;
- }
+ if (c->tcp.fwd_out.mode == FWD_AUTO)
+ tcp_sock_init_lo[port][V6] = s;
}
}
/**
- * tcp_sock_init() - Initialise listening sockets for a given port
+ * tcp_sock_init() - Create listening sockets for a given host ("inbound") port
* @c: Execution context
- * @ns: In pasta mode, if set, bind with loopback address in namespace
* @af: Address family to select a specific IP version, or AF_UNSPEC
* @addr: Pointer to address for binding, NULL if not configured
* @ifname: Name of interface to bind to, NULL if not configured
* @port: Port, host order
*/
-void tcp_sock_init(const struct ctx *c, int ns, sa_family_t af,
- const void *addr, const char *ifname, in_port_t port)
+void tcp_sock_init(const struct ctx *c, sa_family_t af, const void *addr,
+ const char *ifname, in_port_t port)
{
if ((af == AF_INET || af == AF_UNSPEC) && c->ifi4)
- tcp_sock_init4(c, ns, addr, ifname, port);
+ tcp_sock_init4(c, addr, ifname, port);
if ((af == AF_INET6 || af == AF_UNSPEC) && c->ifi6)
- tcp_sock_init6(c, ns, addr, ifname, port);
+ tcp_sock_init6(c, addr, ifname, port);
+}
+
+/**
+ * tcp_ns_sock_init4() - Init socket to listen for outbound IPv4 connections
+ * @c: Execution context
+ * @port: Port, host order
+ */
+static void tcp_ns_sock_init4(const struct ctx *c, in_port_t port)
+{
+ in_port_t idx = port + c->tcp.fwd_out.delta[port];
+ union tcp_epoll_ref tref = { .tcp.listen = 1, .tcp.outbound = 1,
+ .tcp.splice = 1, .tcp.index = idx };
+ struct in_addr loopback = { htonl(INADDR_LOOPBACK) };
+ int s;
+
+ assert(c->mode == MODE_PASTA);
+
+ s = sock_l4(c, AF_INET, IPPROTO_TCP, &loopback, NULL, port, tref.u32);
+ if (s >= 0)
+ tcp_sock_set_bufsize(c, s);
+ else
+ s = -1;
+
+ if (c->tcp.fwd_out.mode == FWD_AUTO)
+ tcp_sock_ns[port][V4] = s;
}
/**
- * tcp_sock_init_ns() - Bind sockets in namespace for outbound connections
+ * tcp_ns_sock_init6() - Init socket to listen for outbound IPv6 connections
+ * @c: Execution context
+ * @port: Port, host order
+ */
+static void tcp_ns_sock_init6(const struct ctx *c, in_port_t port)
+{
+ in_port_t idx = port + c->tcp.fwd_out.delta[port];
+ union tcp_epoll_ref tref = { .tcp.listen = 1, .tcp.outbound = 1,
+ .tcp.splice = 1, .tcp.v6 = 1,
+ .tcp.index = idx };
+ int s;
+
+ assert(c->mode == MODE_PASTA);
+
+ s = sock_l4(c, AF_INET6, IPPROTO_TCP, &in6addr_loopback, NULL, port,
+ tref.u32);
+ if (s >= 0)
+ tcp_sock_set_bufsize(c, s);
+ else
+ s = -1;
+
+ if (c->tcp.fwd_out.mode == FWD_AUTO)
+ tcp_sock_ns[port][V6] = s;
+}
+
+/**
+ * tcp_ns_sock_init() - Init socket to listen for spliced outbound connections
+ * @c: Execution context
+ * @port: Port, host order
+ */
+void tcp_ns_sock_init(const struct ctx *c, in_port_t port)
+{
+ if (c->ifi4)
+ tcp_ns_sock_init4(c, port);
+ if (c->ifi6)
+ tcp_ns_sock_init6(c, port);
+}
+
+/**
+ * tcp_ns_socks_init() - Bind sockets in namespace for outbound connections
* @arg: Execution context
*
* Return: 0
*/
-static int tcp_sock_init_ns(void *arg)
+static int tcp_ns_socks_init(void *arg)
{
struct ctx *c = (struct ctx *)arg;
unsigned port;
@@ -3149,7 +3194,7 @@ static int tcp_sock_init_ns(void *arg)
if (!bitmap_isset(c->tcp.fwd_out.map, port))
continue;
- tcp_sock_init(c, 1, AF_UNSPEC, NULL, NULL, port);
+ tcp_ns_sock_init(c, port);
}
return 0;
@@ -3279,7 +3324,7 @@ int tcp_init(struct ctx *c)
if (c->mode == MODE_PASTA) {
tcp_splice_init(c);
- NS_CALL(tcp_sock_init_ns, c);
+ NS_CALL(tcp_ns_socks_init, c);
refill_arg.ns = 1;
NS_CALL(tcp_sock_refill, &refill_arg);
@@ -3364,8 +3409,7 @@ static int tcp_port_rebind(void *arg)
if ((a->c->ifi4 && tcp_sock_ns[port][V4] == -1) ||
(a->c->ifi6 && tcp_sock_ns[port][V6] == -1))
- tcp_sock_init(a->c, 1, AF_UNSPEC, NULL, NULL,
- port);
+ tcp_ns_sock_init(a->c, port);
}
} else {
for (port = 0; port < NUM_PORTS; port++) {
@@ -3398,7 +3442,7 @@ static int tcp_port_rebind(void *arg)
if ((a->c->ifi4 && tcp_sock_init_ext[port][V4] == -1) ||
(a->c->ifi6 && tcp_sock_init_ext[port][V6] == -1))
- tcp_sock_init(a->c, 0, AF_UNSPEC, NULL, NULL,
+ tcp_sock_init(a->c, AF_UNSPEC, NULL, NULL,
port);
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 23:20:39 +0000