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Add context pointer and source address to the UDP tunnel callback

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These are needed for the forthcoming vxlan implementation. The context
pointer means we do not have to use a spare pointer field in the inpcb,
and the source address is required to populate vxlan's forwarding table.

While I highly doubt there is an out of tree consumer of the UDP
tunneling callback, this change may be a difficult to eventually MFC.

Phabricator:	https://reviews.freebsd.org/D383
Reviewed by:	gnn
This commit is contained in:
Bryan Venteicher 2014-10-10 06:08:59 +00:00
parent 1482f98247
commit 81d3ec1763
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=272886
4 changed files with 15 additions and 8 deletions
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7
sys/netinet/sctputil.c
View File

@ -6832,7 +6832,8 @@ sctp_log_trace(uint32_t subsys, const char *str SCTP_UNUSED, uint32_t a, uint32_
#endif
static void
sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *ignored)
sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *ignored,
const struct sockaddr *sa SCTP_UNUSED, void *ctx SCTP_UNUSED)
{
struct ip *iph;
@ -6968,7 +6969,7 @@ sctp_over_udp_start(void)
}
/* Call the special UDP hook. */
if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp4_tun_socket),
sctp_recv_udp_tunneled_packet))) {
sctp_recv_udp_tunneled_packet, NULL))) {
sctp_over_udp_stop();
return (ret);
}
@ -6992,7 +6993,7 @@ sctp_over_udp_start(void)
}
/* Call the special UDP hook. */
if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp6_tun_socket),
sctp_recv_udp_tunneled_packet))) {
sctp_recv_udp_tunneled_packet, NULL))) {
sctp_over_udp_stop();
return (ret);
}

6
sys/netinet/udp_usrreq.c
View File

@ -312,7 +312,8 @@ udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
*/
up = intoudpcb(inp);
if (up->u_tun_func != NULL) {
(*up->u_tun_func)(n, off, inp);
(*up->u_tun_func)(n, off, inp, (struct sockaddr *)udp_in,
up->u_tun_ctx);
return;
}
@ -1717,7 +1718,7 @@ udp_attach(struct socket *so, int proto, struct thread *td)
#endif /* INET */
int
udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f)
udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, void *ctx)
{
struct inpcb *inp;
struct udpcb *up;
@ -1733,6 +1734,7 @@ udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f)
return (EBUSY);
}
up->u_tun_func = f;
up->u_tun_ctx = ctx;
INP_WUNLOCK(inp);
return (0);
}

7
sys/netinet/udp_var.h
View File

@ -55,7 +55,8 @@ struct udpiphdr {
struct inpcb;
struct mbuf;
typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *);
typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *,
const struct sockaddr *, void *);
/*
* UDP control block; one per udp.
@ -65,6 +66,7 @@ struct udpcb {
u_int u_flags; /* Generic UDP flags. */
uint16_t u_rxcslen; /* Coverage for incoming datagrams. */
uint16_t u_txcslen; /* Coverage for outgoing datagrams. */
void *u_tun_ctx; /* Tunneling callback context. */
};
#define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
@ -176,7 +178,8 @@ void udplite_input(struct mbuf *, int);
struct inpcb *udp_notify(struct inpcb *inp, int errno);
int udp_shutdown(struct socket *so);
int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f);
int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f,
void *ctx);
#endif /* _KERNEL */

3
sys/netinet6/udp6_usrreq.c
View File

@ -150,7 +150,8 @@ udp6_append(struct inpcb *inp, struct mbuf *n, int off,
*/
up = intoudpcb(inp);
if (up->u_tun_func != NULL) {
(*up->u_tun_func)(n, off, inp);
(*up->u_tun_func)(n, off, inp, (struct sockaddr *)fromsa,
up->u_tun_ctx);
return;
}
#ifdef IPSEC