bss_dgram.c: make getsockopt work in cases when optlen is 64-bit value.

[openssl.git] / crypto / bio / bss_dgram.c

diff --git a/crypto/bio/bss_dgram.c b/crypto/bio/bss_dgram.c
index 4d1a64ea358e3869c938f05d9a468180408c73b2..a5a5cc125598af55d5e82640bb982a630e6de2e6 100644 (file)
--- a/crypto/bio/bss_dgram.c
+++ b/crypto/bio/bss_dgram.c
@@ -77,10 +77,20 @@
 #define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
 #endif
 
-#ifdef OPENSSL_SYS_LINUX
+#if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
 #define IP_MTU      14 /* linux is lame */
 #endif
 
+#if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
+/* Standard definition causes type-punning problems. */
+#undef IN6_IS_ADDR_V4MAPPED
+#define s6_addr32 __u6_addr.__u6_addr32
+#define IN6_IS_ADDR_V4MAPPED(a)               \
+        (((a)->s6_addr32[0] == 0) &&          \
+         ((a)->s6_addr32[1] == 0) &&          \
+         ((a)->s6_addr32[2] == htonl(0x0000ffff)))
+#endif
+
 #ifdef WATT32
 #define sock_write SockWrite  /* Watt-32 uses same names */
 #define sock_read  SockRead
@@ -255,7 +265,7 @@ static void dgram_adjust_rcv_timeout(BIO *b)
        {
 #if defined(SO_RCVTIMEO)
        bio_dgram_data *data = (bio_dgram_data *)b->ptr;
-       int sz = sizeof(int);
+       union { size_t s; int i; } sz = {0};
 
        /* Is a timer active? */
        if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
@@ -265,6 +275,8 @@ static void dgram_adjust_rcv_timeout(BIO *b)
                /* Read current socket timeout */
 #ifdef OPENSSL_SYS_WINDOWS
                int timeout;
+
+               sz.i = sizeof(timeout);
                if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
                                           (void*)&timeout, &sz) < 0)
                        { perror("getsockopt"); }
@@ -274,9 +286,12 @@ static void dgram_adjust_rcv_timeout(BIO *b)
                        data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
                        }
 #else
+               sz.i = sizeof(data->socket_timeout);
                if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 
                                                &(data->socket_timeout), (void *)&sz) < 0)
                        { perror("getsockopt"); }
+               else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
+                       OPENSSL_assert(sz.s<=sizeof(data->socket_timeout));
 #endif
 
                /* Get current time */
@@ -445,11 +460,10 @@ 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(IP_MTU_DISCOVER) || defined(IP_MTU)
-       long sockopt_val = 0;
-       unsigned int sockopt_len = 0;
-#endif
-#ifdef OPENSSL_SYS_LINUX
+#if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
+       int sockopt_val = 0;
+       socklen_t sockopt_len;  /* assume that system supporting IP_MTU is
+                                * modern enough to define socklen_t */
        socklen_t addr_len;
        union   {
                struct sockaddr sa;
@@ -531,7 +545,7 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
                break;
                /* (Linux)kernel sets DF bit on outgoing IP packets */
        case BIO_CTRL_DGRAM_MTU_DISCOVER:
-#ifdef OPENSSL_SYS_LINUX
+#if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
                addr_len = (socklen_t)sizeof(addr);
                memset((void *)&addr, 0, sizeof(addr));
                if (getsockname(b->num, &addr.sa, &addr_len) < 0)
@@ -539,7 +553,6 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
                        ret = 0;
                        break;
                        }
-               sockopt_len = sizeof(sockopt_val);
                switch (addr.sa.sa_family)
                        {
                case AF_INET:
@@ -548,7 +561,7 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
                                &sockopt_val, sizeof(sockopt_val))) < 0)
                                perror("setsockopt");
                        break;
-#if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER)
+#if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
                case AF_INET6:
                        sockopt_val = IPV6_PMTUDISC_DO;
                        if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
@@ -565,7 +578,7 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
                break;
 #endif
        case BIO_CTRL_DGRAM_QUERY_MTU:
-#ifdef OPENSSL_SYS_LINUX
+#if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
                addr_len = (socklen_t)sizeof(addr);
                memset((void *)&addr, 0, sizeof(addr));
                if (getsockname(b->num, &addr.sa, &addr_len) < 0)
@@ -616,6 +629,27 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
                ret = 0;
 #endif
                break;
+       case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
+               switch (data->peer.sa.sa_family)
+                       {
+                       case AF_INET:
+                               ret = 576 - 20 - 8;
+                               break;
+#if OPENSSL_USE_IPV6
+                       case AF_INET6:
+#ifdef IN6_IS_ADDR_V4MAPPED
+                               if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
+                                       ret = 576 - 20 - 8;
+                               else
+#endif
+                                       ret = 1280 - 40 - 8;
+                               break;
+#endif
+                       default:
+                               ret = 576 - 20 - 8;
+                               break;
+                       }
+               break;
        case BIO_CTRL_DGRAM_GET_MTU:
                return data->mtu;
                break;
@@ -706,10 +740,13 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
 #endif
                break;
        case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
-#ifdef OPENSSL_SYS_WINDOWS
                {
-               int timeout, sz = sizeof(timeout);
+               union { size_t s; int i; } sz = {0};
+#ifdef OPENSSL_SYS_WINDOWS
+               int timeout;
                struct timeval *tv = (struct timeval *)ptr;
+
+               sz.i = sizeof(timeout);
                if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
                        (void*)&timeout, &sz) < 0)
                        { perror("getsockopt"); ret = -1; }
@@ -719,12 +756,20 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
                        tv->tv_usec = (timeout % 1000) * 1000;
                        ret = sizeof(*tv);
                        }
-               }
 #else
+               sz.i = sizeof(struct timeval);
                if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 
-                       ptr, (void *)&ret) < 0)
+                       ptr, (void *)&sz) < 0)
                        { perror("getsockopt"); ret = -1; }
+               else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
+                       {
+                       OPENSSL_assert(sz.s<=sizeof(struct timeval));
+                       ret = (int)sz.s;
+                       }
+               else
+                       ret = sz.i;
 #endif
+               }
                break;
 #endif
 #if defined(SO_SNDTIMEO)
@@ -744,10 +789,13 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
 #endif
                break;
        case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
-#ifdef OPENSSL_SYS_WINDOWS
                {
-               int timeout, sz = sizeof(timeout);
+               union { size_t s; int i; } sz = {0};
+#ifdef OPENSSL_SYS_WINDOWS
+               int timeout;
                struct timeval *tv = (struct timeval *)ptr;
+
+               sz.i = sizeof(timeout);
                if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
                        (void*)&timeout, &sz) < 0)
                        { perror("getsockopt"); ret = -1; }
@@ -759,10 +807,19 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
                        }
                }
 #else
+               sz.i = sizeof(struct timeval);
                if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, 
-                       ptr, (void *)&ret) < 0)
+                       ptr, (void *)&sz) < 0)
                        { perror("getsockopt"); ret = -1; }
+               else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
+                       {
+                       OPENSSL_assert(sz.s<=sizeof(struct timeval));
+                       ret = (int)sz.s;
+                       }
+               else
+                       ret = sz.i;
 #endif
+               }
                break;
 #endif
        case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
@@ -934,7 +991,6 @@ static int dgram_sctp_free(BIO *a)
 #ifdef SCTP_AUTHENTICATION_EVENT
 void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
        {
-       unsigned int sockopt_len = 0;
        int ret;
        struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event;
 
@@ -944,9 +1000,8 @@ void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
 
                /* delete key */
                authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
-               sockopt_len = sizeof(struct sctp_authkeyid);
                ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
-                     &authkeyid, sockopt_len);
+                     &authkeyid, sizeof(struct sctp_authkeyid));
                }
        }
 #endif
@@ -1277,7 +1332,7 @@ static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
        {
        long ret=1;
        bio_dgram_sctp_data *data = NULL;
-       unsigned int sockopt_len = 0;
+       socklen_t sockopt_len = 0;
        struct sctp_authkeyid authkeyid;
        struct sctp_authkey *authkey;