Bug 1975576 - Allow ioctls used by WebRTC for interface info in Linux socket process sandbox. a=RyanVM DONTBUILD

Original Revision: https://phabricator.services.mozilla.com/D265735

Differential Revision: https://phabricator.services.mozilla.com/D267151

security/sandbox/linux/SandboxFilter.cpp

@@ -12,6 +12,7 @@
 #include <linux/ipc.h>
 #include <linux/net.h>
 #include <linux/sched.h>
+#include <linux/sockios.h>
 #include <string.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
@@ -22,6 +23,8 @@
 #include <sys/utsname.h>
 #include <time.h>
 #include <unistd.h>
+// This has to go after <sys/socket.h> for annoying reasons
+#include <linux/wireless.h>
 
 #include <algorithm>
 #include <utility>
@@ -2231,16 +2234,21 @@ class SocketProcessSandboxPolicy final : public SandboxPolicyCommon {
         auto shifted_type = request & kIoctlTypeMask;
 
         // Rust's stdlib seems to use FIOCLEX instead of equivalent fcntls.
-        return If(request == FIOCLEX, Allow())
+        return Switch(request)
+            .Case(FIOCLEX, Allow())
             // Rust's stdlib also uses FIONBIO instead of equivalent fcntls.
-            .ElseIf(request == FIONBIO, Allow())
+            .Case(FIONBIO, Allow())
             // This is used by PR_Available in nsSocketInputStream::Available.
-            .ElseIf(request == FIONREAD, Allow())
-            // Allow anything that isn't a tty ioctl (if level < 2)
-            .ElseIf(
-                BelowLevel(2) ? shifted_type != kTtyIoctls : BoolConst(false),
-                Allow())
-            .Else(SandboxPolicyCommon::EvaluateSyscall(sysno));
+            .Case(FIONREAD, Allow())
+            // WebRTC needs interface information (bug 1975576)
+            .Cases({SIOCGIFNAME, SIOCGIFFLAGS, SIOCETHTOOL, SIOCGIWRATE},
+                   Allow())
+            .Default(
+                // Allow anything that isn't a tty ioctl (if level < 2)
+                If(BelowLevel(2) ? shifted_type != kTtyIoctls
+                                 : BoolConst(false),
+                   Allow())
+                    .Else(SandboxPolicyCommon::EvaluateSyscall(sysno)));
       }
 
       CASES_FOR_fcntl: {