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bss_dgram.c: add BIO_CTRL_DGRAM_SET_DONT_FRAG.

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PR: 2830
Submitted by: Robin Seggelmann
This commit is contained in:
Andy Polyakov 2012-06-11 14:56:25 +00:00
parent e77ec2ba6f
commit 447e1319b1
2 changed files with 46 additions and 1 deletions
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1
crypto/bio/bio.h
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@ -174,6 +174,7 @@ extern "C" {
#define BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT 45 /* Next DTLS handshake timeout to
* adjust socket timeouts */
#define BIO_CTRL_DGRAM_SET_DONT_FRAG 48
#ifndef OPENSSL_NO_SCTP
/* SCTP stuff */

46
crypto/bio/bss_dgram.c
View File

@ -460,8 +460,8 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
int *ip;
struct sockaddr *to = NULL;
bio_dgram_data *data = NULL;
#if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
int sockopt_val = 0;
#if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
socklen_t sockopt_len; /* assume that system supporting IP_MTU is
* modern enough to define socklen_t */
socklen_t addr_len;
@ -848,6 +848,50 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
ret = 0;
break;
#endif
case BIO_CTRL_DGRAM_SET_DONT_FRAG:
sockopt_val = num ? 1 : 0;
switch (data->peer.sa.sa_family)
{
case AF_INET:
#if defined(IP_DONTFRAG)
if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
&sockopt_val, sizeof(sockopt_val))) < 0)
{ perror("setsockopt"); ret = -1; }
#elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
(ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
&sockopt_val, sizeof(sockopt_val))) < 0)
{ perror("setsockopt"); ret = -1; }
#elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
(const char *)&sockopt_val, sizeof(sockopt_val))) < 0)
{ perror("setsockopt"); ret = -1; }
#else
ret = -1;
#endif
break;
#if OPENSSL_USE_IPV6
case AF_INET6:
#if defined(IPV6_DONTFRAG)
if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
&sockopt_val, sizeof(sockopt_val))) < 0)
{ perror("setsockopt"); ret = -1; }
#elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
(ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
&sockopt_val, sizeof(sockopt_val))) < 0)
{ perror("setsockopt"); ret = -1; }
#else
ret = -1;
#endif
break;
#endif
default:
ret = -1;
break;
}
break;
default:
ret=0;
break;