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patch: add dtls_set_mtu()

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This commit is contained in:
Alfred E. Heggestad 2016-02-15 15:21:22 +00:00
parent 71f79e7198
commit 88aa3a0097
2 changed files with 34 additions and 2 deletions
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1
include/re_tls.h
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@ -63,6 +63,7 @@ int dtls_listen(struct dtls_sock **sockp, const struct sa *laddr,
struct udp_sock *us, uint32_t htsize, int layer,
dtls_conn_h *connh, void *arg);
struct udp_sock *dtls_udp_sock(struct dtls_sock *sock);
void dtls_set_mtu(struct dtls_sock *sock, size_t mtu);
int dtls_connect(struct tls_conn **ptc, struct tls *tls,
struct dtls_sock *sock, const struct sa *peer,
dtls_estab_h *estabh, dtls_recv_h *recvh,

35
src/tls/openssl/tls_udp.c
View file

@ -25,6 +25,12 @@
#include <re_dbg.h>
enum {
MTU_DEFAULT = 1400,
MTU_FALLBACK = 548,
};
struct dtls_sock {
struct sa peer;
struct udp_helper *uh;
@ -33,6 +39,7 @@ struct dtls_sock {
struct mbuf *mb;
dtls_conn_h *connh;
void *arg;
size_t mtu;
};
@ -103,13 +110,21 @@ static int bio_write(BIO *b, const char *buf, int len)
static long bio_ctrl(BIO *b, int cmd, long num, void *ptr)
{
(void)b;
struct tls_conn *tc = b->ptr;
(void)num;
(void)ptr;
if (cmd == BIO_CTRL_FLUSH) {
switch (cmd) {
case BIO_CTRL_FLUSH:
/* The OpenSSL library needs this */
return 1;
case BIO_CTRL_DGRAM_QUERY_MTU:
return tc ? tc->sock->mtu : MTU_DEFAULT;
case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
return MTU_FALLBACK;
}
return 0;
@ -706,6 +721,7 @@ int dtls_listen(struct dtls_sock **sockp, const struct sa *laddr,
if (err)
goto out;
sock->mtu = MTU_DEFAULT;
sock->connh = connh;
sock->arg = arg;
@ -730,3 +746,18 @@ struct udp_sock *dtls_udp_sock(struct dtls_sock *sock)
{
return sock ? sock->us : NULL;
}
/**
* Set MTU on a DTLS Socket
*
* @param sock DTLS Socket
* @param mtu MTU value
*/
void dtls_set_mtu(struct dtls_sock *sock, size_t mtu)
{
if (!sock)
return;
sock->mtu = mtu;
}