Fix for wrong parameter size for IP_MULTICAST_TTL and IP_MULTICAST_LOOP in setsockopt()

[Jensen Lars-CLJ016]

The size of parameter setsockopt() is unsigned char for IP_MULTICAST_TTL and IP_MULTICAST_LOOP.

This is needed to work on Solaris10 but linux also accept int that is why the current version works on linux.

Patch:
--------------------------------------------------------
otp_src_R13B04/erts/emulator/drivers/common/inet_drv.c:
@@ -4542,6 +4542,7
@@ static int inet_set_opts(inet_descriptor* desc, char* ptr,
     struct ip_mreq mreq_val;
 #endif
     int ival;
+    unsigned char cval; // needed for MULTICAST_TTL and MULTICAST_LOOP
     char* arg_ptr;
     int arg_sz;
     enum PacketParseType old_htype = desc->htype; @@ -4795,6 +4796,11 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr
 #ifdef HAVE_MULTICAST_SUPPORT
 
        case UDP_OPT_MULTICAST_TTL:
+         /* The datatype is unsigned char*/
+           cval = (unsigned char) ival;
+           arg_sz = sizeof(cval);
+           arg_ptr = (char*) &cval;
+
            proto = IPPROTO_IP;
            type = IP_MULTICAST_TTL;
            DEBUGF(("inet_set_opts(%ld): s=%d, IP_MULTICAST_TTL=%d\r\n", @@ -4802,6 +4808,11 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr
            break;
 
        case UDP_OPT_MULTICAST_LOOP:
+         /* The datatype is unsigned char*/
+           cval = (unsigned char) ival;
+           arg_sz = sizeof(cval);
+           arg_ptr = (char*) &cval;
+
            proto = IPPROTO_IP;
            type = IP_MULTICAST_LOOP;
            DEBUGF(("inet_set_opts(%ld): s=%d, IP_MULTICAST_LOOP=%d\r\n",
--------------------------------------------------------

Lars S. Jensen
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