Commit 447e1319 authored by Andy Polyakov's avatar Andy Polyakov
Browse files

bss_dgram.c: add BIO_CTRL_DGRAM_SET_DONT_FRAG. 

PR: 2830
Submitted by: Robin Seggelmann
parent e77ec2ba

crypto/bio/bio.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */

crypto/bio/bss_dgram.c

+45 −1
Original line number Diff line number Diff line
@@ -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;