From e589002ddb488beaa4c6ee83403b028fd01e9bf5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Luis=20Mill=C3=A1n?= <jmillan@aliax.net>
Date: Mon, 28 Jan 2013 17:31:06 +0100
Subject: [PATCH] Fix. Allow case-insentivity in SIP grammar, when corresponds

Make header values, parameter names and parameter values case-insensitive
---
 src/grammar/dist/grammar.js   | 300 +++++++++++++++++-----------------
 src/grammar/src/grammar.pegjs |  94 +++++------
 2 files changed, 197 insertions(+), 197 deletions(-)

diff --git a/src/grammar/dist/grammar.js b/src/grammar/dist/grammar.js
index a896d2071..46bcac4d9 100644
--- a/src/grammar/dist/grammar.js
+++ b/src/grammar/dist/grammar.js
@@ -2972,8 +2972,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 3) === "sip") {
-          result0 = "sip";
+        if (input.substr(pos, 3).toLowerCase() === "sip") {
+          result0 = input.substr(pos, 3);
           pos += 3;
         } else {
           result0 = null;
@@ -5629,8 +5629,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 10) === "transport=") {
-          result0 = "transport=";
+        if (input.substr(pos, 10).toLowerCase() === "transport=") {
+          result0 = input.substr(pos, 10);
           pos += 10;
         } else {
           result0 = null;
@@ -5639,8 +5639,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 !== null) {
-          if (input.substr(pos, 3) === "udp") {
-            result1 = "udp";
+          if (input.substr(pos, 3).toLowerCase() === "udp") {
+            result1 = input.substr(pos, 3);
             pos += 3;
           } else {
             result1 = null;
@@ -5649,8 +5649,8 @@ JsSIP.grammar = (function(){
             }
           }
           if (result1 === null) {
-            if (input.substr(pos, 3) === "tcp") {
-              result1 = "tcp";
+            if (input.substr(pos, 3).toLowerCase() === "tcp") {
+              result1 = input.substr(pos, 3);
               pos += 3;
             } else {
               result1 = null;
@@ -5659,8 +5659,8 @@ JsSIP.grammar = (function(){
               }
             }
             if (result1 === null) {
-              if (input.substr(pos, 4) === "sctp") {
-                result1 = "sctp";
+              if (input.substr(pos, 4).toLowerCase() === "sctp") {
+                result1 = input.substr(pos, 4);
                 pos += 4;
               } else {
                 result1 = null;
@@ -5669,8 +5669,8 @@ JsSIP.grammar = (function(){
                 }
               }
               if (result1 === null) {
-                if (input.substr(pos, 3) === "tls") {
-                  result1 = "tls";
+                if (input.substr(pos, 3).toLowerCase() === "tls") {
+                  result1 = input.substr(pos, 3);
                   pos += 3;
                 } else {
                   result1 = null;
@@ -5711,8 +5711,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 5) === "user=") {
-          result0 = "user=";
+        if (input.substr(pos, 5).toLowerCase() === "user=") {
+          result0 = input.substr(pos, 5);
           pos += 5;
         } else {
           result0 = null;
@@ -5721,8 +5721,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 !== null) {
-          if (input.substr(pos, 5) === "phone") {
-            result1 = "phone";
+          if (input.substr(pos, 5).toLowerCase() === "phone") {
+            result1 = input.substr(pos, 5);
             pos += 5;
           } else {
             result1 = null;
@@ -5731,8 +5731,8 @@ JsSIP.grammar = (function(){
             }
           }
           if (result1 === null) {
-            if (input.substr(pos, 2) === "ip") {
-              result1 = "ip";
+            if (input.substr(pos, 2).toLowerCase() === "ip") {
+              result1 = input.substr(pos, 2);
               pos += 2;
             } else {
               result1 = null;
@@ -5771,8 +5771,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 7) === "method=") {
-          result0 = "method=";
+        if (input.substr(pos, 7).toLowerCase() === "method=") {
+          result0 = input.substr(pos, 7);
           pos += 7;
         } else {
           result0 = null;
@@ -5809,8 +5809,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 4) === "ttl=") {
-          result0 = "ttl=";
+        if (input.substr(pos, 4).toLowerCase() === "ttl=") {
+          result0 = input.substr(pos, 4);
           pos += 4;
         } else {
           result0 = null;
@@ -5847,8 +5847,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 6) === "maddr=") {
-          result0 = "maddr=";
+        if (input.substr(pos, 6).toLowerCase() === "maddr=") {
+          result0 = input.substr(pos, 6);
           pos += 6;
         } else {
           result0 = null;
@@ -5884,8 +5884,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 2) === "lr") {
-          result0 = "lr";
+        if (input.substr(pos, 2).toLowerCase() === "lr") {
+          result0 = input.substr(pos, 2);
           pos += 2;
         } else {
           result0 = null;
@@ -7325,8 +7325,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 3) === "SIP") {
-          result0 = "SIP";
+        if (input.substr(pos, 3).toLowerCase() === "sip") {
+          result0 = input.substr(pos, 3);
           pos += 3;
         } else {
           result0 = null;
@@ -8056,8 +8056,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.charCodeAt(pos) === 113) {
-          result0 = "q";
+        if (input.substr(pos, 1).toLowerCase() === "q") {
+          result0 = input.substr(pos, 1);
           pos++;
         } else {
           result0 = null;
@@ -8100,8 +8100,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 7) === "expires") {
-          result0 = "expires";
+        if (input.substr(pos, 7).toLowerCase() === "expires") {
+          result0 = input.substr(pos, 7);
           pos += 7;
         } else {
           result0 = null;
@@ -8374,8 +8374,8 @@ JsSIP.grammar = (function(){
       function parse_disp_type() {
         var result0;
         
-        if (input.substr(pos, 6) === "render") {
-          result0 = "render";
+        if (input.substr(pos, 6).toLowerCase() === "render") {
+          result0 = input.substr(pos, 6);
           pos += 6;
         } else {
           result0 = null;
@@ -8384,8 +8384,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 === null) {
-          if (input.substr(pos, 7) === "session") {
-            result0 = "session";
+          if (input.substr(pos, 7).toLowerCase() === "session") {
+            result0 = input.substr(pos, 7);
             pos += 7;
           } else {
             result0 = null;
@@ -8394,8 +8394,8 @@ JsSIP.grammar = (function(){
             }
           }
           if (result0 === null) {
-            if (input.substr(pos, 4) === "icon") {
-              result0 = "icon";
+            if (input.substr(pos, 4).toLowerCase() === "icon") {
+              result0 = input.substr(pos, 4);
               pos += 4;
             } else {
               result0 = null;
@@ -8404,8 +8404,8 @@ JsSIP.grammar = (function(){
               }
             }
             if (result0 === null) {
-              if (input.substr(pos, 5) === "alert") {
-                result0 = "alert";
+              if (input.substr(pos, 5).toLowerCase() === "alert") {
+                result0 = input.substr(pos, 5);
                 pos += 5;
               } else {
                 result0 = null;
@@ -8437,8 +8437,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 8) === "handling") {
-          result0 = "handling";
+        if (input.substr(pos, 8).toLowerCase() === "handling") {
+          result0 = input.substr(pos, 8);
           pos += 8;
         } else {
           result0 = null;
@@ -8449,8 +8449,8 @@ JsSIP.grammar = (function(){
         if (result0 !== null) {
           result1 = parse_EQUAL();
           if (result1 !== null) {
-            if (input.substr(pos, 8) === "optional") {
-              result2 = "optional";
+            if (input.substr(pos, 8).toLowerCase() === "optional") {
+              result2 = input.substr(pos, 8);
               pos += 8;
             } else {
               result2 = null;
@@ -8459,8 +8459,8 @@ JsSIP.grammar = (function(){
               }
             }
             if (result2 === null) {
-              if (input.substr(pos, 8) === "required") {
-                result2 = "required";
+              if (input.substr(pos, 8).toLowerCase() === "required") {
+                result2 = input.substr(pos, 8);
                 pos += 8;
               } else {
                 result2 = null;
@@ -8659,8 +8659,8 @@ JsSIP.grammar = (function(){
       function parse_discrete_type() {
         var result0;
         
-        if (input.substr(pos, 4) === "text") {
-          result0 = "text";
+        if (input.substr(pos, 4).toLowerCase() === "text") {
+          result0 = input.substr(pos, 4);
           pos += 4;
         } else {
           result0 = null;
@@ -8669,8 +8669,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 === null) {
-          if (input.substr(pos, 5) === "image") {
-            result0 = "image";
+          if (input.substr(pos, 5).toLowerCase() === "image") {
+            result0 = input.substr(pos, 5);
             pos += 5;
           } else {
             result0 = null;
@@ -8679,8 +8679,8 @@ JsSIP.grammar = (function(){
             }
           }
           if (result0 === null) {
-            if (input.substr(pos, 5) === "audio") {
-              result0 = "audio";
+            if (input.substr(pos, 5).toLowerCase() === "audio") {
+              result0 = input.substr(pos, 5);
               pos += 5;
             } else {
               result0 = null;
@@ -8689,8 +8689,8 @@ JsSIP.grammar = (function(){
               }
             }
             if (result0 === null) {
-              if (input.substr(pos, 5) === "video") {
-                result0 = "video";
+              if (input.substr(pos, 5).toLowerCase() === "video") {
+                result0 = input.substr(pos, 5);
                 pos += 5;
               } else {
                 result0 = null;
@@ -8699,8 +8699,8 @@ JsSIP.grammar = (function(){
                 }
               }
               if (result0 === null) {
-                if (input.substr(pos, 11) === "application") {
-                  result0 = "application";
+                if (input.substr(pos, 11).toLowerCase() === "application") {
+                  result0 = input.substr(pos, 11);
                   pos += 11;
                 } else {
                   result0 = null;
@@ -8721,8 +8721,8 @@ JsSIP.grammar = (function(){
       function parse_composite_type() {
         var result0;
         
-        if (input.substr(pos, 7) === "message") {
-          result0 = "message";
+        if (input.substr(pos, 7).toLowerCase() === "message") {
+          result0 = input.substr(pos, 7);
           pos += 7;
         } else {
           result0 = null;
@@ -8731,8 +8731,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 === null) {
-          if (input.substr(pos, 9) === "multipart") {
-            result0 = "multipart";
+          if (input.substr(pos, 9).toLowerCase() === "multipart") {
+            result0 = input.substr(pos, 9);
             pos += 9;
           } else {
             result0 = null;
@@ -8762,8 +8762,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 2) === "x-") {
-          result0 = "x-";
+        if (input.substr(pos, 2).toLowerCase() === "x-") {
+          result0 = input.substr(pos, 2);
           pos += 2;
         } else {
           result0 = null;
@@ -9121,8 +9121,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 3) === "tag") {
-          result0 = "tag";
+        if (input.substr(pos, 3).toLowerCase() === "tag") {
+          result0 = input.substr(pos, 3);
           pos += 3;
         } else {
           result0 = null;
@@ -9209,8 +9209,8 @@ JsSIP.grammar = (function(){
         var pos0, pos1;
         
         pos0 = pos;
-        if (input.substr(pos, 6) === "Digest") {
-          result0 = "Digest";
+        if (input.substr(pos, 6).toLowerCase() === "digest") {
+          result0 = input.substr(pos, 6);
           pos += 6;
         } else {
           result0 = null;
@@ -9406,8 +9406,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 5) === "realm") {
-          result0 = "realm";
+        if (input.substr(pos, 5).toLowerCase() === "realm") {
+          result0 = input.substr(pos, 5);
           pos += 5;
         } else {
           result0 = null;
@@ -9456,8 +9456,8 @@ JsSIP.grammar = (function(){
         var pos0, pos1;
         
         pos0 = pos;
-        if (input.substr(pos, 6) === "domain") {
-          result0 = "domain";
+        if (input.substr(pos, 6).toLowerCase() === "domain") {
+          result0 = input.substr(pos, 6);
           pos += 6;
         } else {
           result0 = null;
@@ -9568,8 +9568,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 5) === "nonce") {
-          result0 = "nonce";
+        if (input.substr(pos, 5).toLowerCase() === "nonce") {
+          result0 = input.substr(pos, 5);
           pos += 5;
         } else {
           result0 = null;
@@ -9619,8 +9619,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 6) === "opaque") {
-          result0 = "opaque";
+        if (input.substr(pos, 6).toLowerCase() === "opaque") {
+          result0 = input.substr(pos, 6);
           pos += 6;
         } else {
           result0 = null;
@@ -9662,8 +9662,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 5) === "stale") {
-          result0 = "stale";
+        if (input.substr(pos, 5).toLowerCase() === "stale") {
+          result0 = input.substr(pos, 5);
           pos += 5;
         } else {
           result0 = null;
@@ -9674,8 +9674,8 @@ JsSIP.grammar = (function(){
         if (result0 !== null) {
           result1 = parse_EQUAL();
           if (result1 !== null) {
-            if (input.substr(pos, 4) === "true") {
-              result2 = "true";
+            if (input.substr(pos, 4).toLowerCase() === "true") {
+              result2 = input.substr(pos, 4);
               pos += 4;
             } else {
               result2 = null;
@@ -9684,8 +9684,8 @@ JsSIP.grammar = (function(){
               }
             }
             if (result2 === null) {
-              if (input.substr(pos, 5) === "false") {
-                result2 = "false";
+              if (input.substr(pos, 5).toLowerCase() === "false") {
+                result2 = input.substr(pos, 5);
                 pos += 5;
               } else {
                 result2 = null;
@@ -9724,8 +9724,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 9) === "algorithm") {
-          result0 = "algorithm";
+        if (input.substr(pos, 9).toLowerCase() === "algorithm") {
+          result0 = input.substr(pos, 9);
           pos += 9;
         } else {
           result0 = null;
@@ -9736,8 +9736,8 @@ JsSIP.grammar = (function(){
         if (result0 !== null) {
           result1 = parse_EQUAL();
           if (result1 !== null) {
-            if (input.substr(pos, 3) === "MD5") {
-              result2 = "MD5";
+            if (input.substr(pos, 3).toLowerCase() === "md5") {
+              result2 = input.substr(pos, 3);
               pos += 3;
             } else {
               result2 = null;
@@ -9746,8 +9746,8 @@ JsSIP.grammar = (function(){
               }
             }
             if (result2 === null) {
-              if (input.substr(pos, 8) === "MD5-sess") {
-                result2 = "MD5-sess";
+              if (input.substr(pos, 8).toLowerCase() === "md5-sess") {
+                result2 = input.substr(pos, 8);
                 pos += 8;
               } else {
                 result2 = null;
@@ -9789,8 +9789,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 3) === "qop") {
-          result0 = "qop";
+        if (input.substr(pos, 3).toLowerCase() === "qop") {
+          result0 = input.substr(pos, 3);
           pos += 3;
         } else {
           result0 = null;
@@ -9901,8 +9901,8 @@ JsSIP.grammar = (function(){
       function parse_qop_value() {
         var result0;
         
-        if (input.substr(pos, 8) === "auth-int") {
-          result0 = "auth-int";
+        if (input.substr(pos, 8).toLowerCase() === "auth-int") {
+          result0 = input.substr(pos, 8);
           pos += 8;
         } else {
           result0 = null;
@@ -9911,8 +9911,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 === null) {
-          if (input.substr(pos, 4) === "auth") {
-            result0 = "auth";
+          if (input.substr(pos, 4).toLowerCase() === "auth") {
+            result0 = input.substr(pos, 4);
             pos += 4;
           } else {
             result0 = null;
@@ -10296,8 +10296,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 6) === "active") {
-          result0 = "active";
+        if (input.substr(pos, 6).toLowerCase() === "active") {
+          result0 = input.substr(pos, 6);
           pos += 6;
         } else {
           result0 = null;
@@ -10306,8 +10306,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 === null) {
-          if (input.substr(pos, 7) === "pending") {
-            result0 = "pending";
+          if (input.substr(pos, 7).toLowerCase() === "pending") {
+            result0 = input.substr(pos, 7);
             pos += 7;
           } else {
             result0 = null;
@@ -10316,8 +10316,8 @@ JsSIP.grammar = (function(){
             }
           }
           if (result0 === null) {
-            if (input.substr(pos, 10) === "terminated") {
-              result0 = "terminated";
+            if (input.substr(pos, 10).toLowerCase() === "terminated") {
+              result0 = input.substr(pos, 10);
               pos += 10;
             } else {
               result0 = null;
@@ -10346,8 +10346,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 6) === "reason") {
-          result0 = "reason";
+        if (input.substr(pos, 6).toLowerCase() === "reason") {
+          result0 = input.substr(pos, 6);
           pos += 6;
         } else {
           result0 = null;
@@ -10383,8 +10383,8 @@ JsSIP.grammar = (function(){
         if (result0 === null) {
           pos0 = pos;
           pos1 = pos;
-          if (input.substr(pos, 7) === "expires") {
-            result0 = "expires";
+          if (input.substr(pos, 7).toLowerCase() === "expires") {
+            result0 = input.substr(pos, 7);
             pos += 7;
           } else {
             result0 = null;
@@ -10420,8 +10420,8 @@ JsSIP.grammar = (function(){
           if (result0 === null) {
             pos0 = pos;
             pos1 = pos;
-            if (input.substr(pos, 11) === "retry_after") {
-              result0 = "retry_after";
+            if (input.substr(pos, 11).toLowerCase() === "retry_after") {
+              result0 = input.substr(pos, 11);
               pos += 11;
             } else {
               result0 = null;
@@ -10477,8 +10477,8 @@ JsSIP.grammar = (function(){
       function parse_event_reason_value() {
         var result0;
         
-        if (input.substr(pos, 11) === "deactivated") {
-          result0 = "deactivated";
+        if (input.substr(pos, 11).toLowerCase() === "deactivated") {
+          result0 = input.substr(pos, 11);
           pos += 11;
         } else {
           result0 = null;
@@ -10487,8 +10487,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 === null) {
-          if (input.substr(pos, 9) === "probation") {
-            result0 = "probation";
+          if (input.substr(pos, 9).toLowerCase() === "probation") {
+            result0 = input.substr(pos, 9);
             pos += 9;
           } else {
             result0 = null;
@@ -10497,8 +10497,8 @@ JsSIP.grammar = (function(){
             }
           }
           if (result0 === null) {
-            if (input.substr(pos, 8) === "rejected") {
-              result0 = "rejected";
+            if (input.substr(pos, 8).toLowerCase() === "rejected") {
+              result0 = input.substr(pos, 8);
               pos += 8;
             } else {
               result0 = null;
@@ -10507,8 +10507,8 @@ JsSIP.grammar = (function(){
               }
             }
             if (result0 === null) {
-              if (input.substr(pos, 7) === "timeout") {
-                result0 = "timeout";
+              if (input.substr(pos, 7).toLowerCase() === "timeout") {
+                result0 = input.substr(pos, 7);
                 pos += 7;
               } else {
                 result0 = null;
@@ -10517,8 +10517,8 @@ JsSIP.grammar = (function(){
                 }
               }
               if (result0 === null) {
-                if (input.substr(pos, 6) === "giveup") {
-                  result0 = "giveup";
+                if (input.substr(pos, 6).toLowerCase() === "giveup") {
+                  result0 = input.substr(pos, 6);
                   pos += 6;
                 } else {
                   result0 = null;
@@ -10527,8 +10527,8 @@ JsSIP.grammar = (function(){
                   }
                 }
                 if (result0 === null) {
-                  if (input.substr(pos, 10) === "noresource") {
-                    result0 = "noresource";
+                  if (input.substr(pos, 10).toLowerCase() === "noresource") {
+                    result0 = input.substr(pos, 10);
                     pos += 10;
                   } else {
                     result0 = null;
@@ -10537,8 +10537,8 @@ JsSIP.grammar = (function(){
                     }
                   }
                   if (result0 === null) {
-                    if (input.substr(pos, 9) === "invariant") {
-                      result0 = "invariant";
+                    if (input.substr(pos, 9).toLowerCase() === "invariant") {
+                      result0 = input.substr(pos, 9);
                       pos += 9;
                     } else {
                       result0 = null;
@@ -10828,8 +10828,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 3) === "ttl") {
-          result0 = "ttl";
+        if (input.substr(pos, 3).toLowerCase() === "ttl") {
+          result0 = input.substr(pos, 3);
           pos += 3;
         } else {
           result0 = null;
@@ -10871,8 +10871,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 5) === "maddr") {
-          result0 = "maddr";
+        if (input.substr(pos, 5).toLowerCase() === "maddr") {
+          result0 = input.substr(pos, 5);
           pos += 5;
         } else {
           result0 = null;
@@ -10914,8 +10914,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 8) === "received") {
-          result0 = "received";
+        if (input.substr(pos, 8).toLowerCase() === "received") {
+          result0 = input.substr(pos, 8);
           pos += 8;
         } else {
           result0 = null;
@@ -10960,8 +10960,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 6) === "branch") {
-          result0 = "branch";
+        if (input.substr(pos, 6).toLowerCase() === "branch") {
+          result0 = input.substr(pos, 6);
           pos += 6;
         } else {
           result0 = null;
@@ -11003,8 +11003,8 @@ JsSIP.grammar = (function(){
         
         pos0 = pos;
         pos1 = pos;
-        if (input.substr(pos, 5) === "rport") {
-          result0 = "rport";
+        if (input.substr(pos, 5).toLowerCase() === "rport") {
+          result0 = input.substr(pos, 5);
           pos += 5;
         } else {
           result0 = null;
@@ -11098,8 +11098,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 3) === "SIP") {
-          result0 = "SIP";
+        if (input.substr(pos, 3).toLowerCase() === "sip") {
+          result0 = input.substr(pos, 3);
           pos += 3;
         } else {
           result0 = null;
@@ -11125,8 +11125,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 3) === "UDP") {
-          result0 = "UDP";
+        if (input.substr(pos, 3).toLowerCase() === "udp") {
+          result0 = input.substr(pos, 3);
           pos += 3;
         } else {
           result0 = null;
@@ -11135,8 +11135,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 === null) {
-          if (input.substr(pos, 3) === "TCP") {
-            result0 = "TCP";
+          if (input.substr(pos, 3).toLowerCase() === "tcp") {
+            result0 = input.substr(pos, 3);
             pos += 3;
           } else {
             result0 = null;
@@ -11145,8 +11145,8 @@ JsSIP.grammar = (function(){
             }
           }
           if (result0 === null) {
-            if (input.substr(pos, 3) === "TLS") {
-              result0 = "TLS";
+            if (input.substr(pos, 3).toLowerCase() === "tls") {
+              result0 = input.substr(pos, 3);
               pos += 3;
             } else {
               result0 = null;
@@ -11155,8 +11155,8 @@ JsSIP.grammar = (function(){
               }
             }
             if (result0 === null) {
-              if (input.substr(pos, 4) === "SCTP") {
-                result0 = "SCTP";
+              if (input.substr(pos, 4).toLowerCase() === "sctp") {
+                result0 = input.substr(pos, 4);
                 pos += 4;
               } else {
                 result0 = null;
@@ -11436,8 +11436,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 5) === "stuns") {
-          result0 = "stuns";
+        if (input.substr(pos, 5).toLowerCase() === "stuns") {
+          result0 = input.substr(pos, 5);
           pos += 5;
         } else {
           result0 = null;
@@ -11446,8 +11446,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 === null) {
-          if (input.substr(pos, 4) === "stun") {
-            result0 = "stun";
+          if (input.substr(pos, 4).toLowerCase() === "stun") {
+            result0 = input.substr(pos, 4);
             pos += 4;
           } else {
             result0 = null;
@@ -11802,8 +11802,8 @@ JsSIP.grammar = (function(){
         var pos0;
         
         pos0 = pos;
-        if (input.substr(pos, 5) === "turns") {
-          result0 = "turns";
+        if (input.substr(pos, 5).toLowerCase() === "turns") {
+          result0 = input.substr(pos, 5);
           pos += 5;
         } else {
           result0 = null;
@@ -11812,8 +11812,8 @@ JsSIP.grammar = (function(){
           }
         }
         if (result0 === null) {
-          if (input.substr(pos, 4) === "turn") {
-            result0 = "turn";
+          if (input.substr(pos, 4).toLowerCase() === "turn") {
+            result0 = input.substr(pos, 4);
             pos += 4;
           } else {
             result0 = null;
@@ -11840,8 +11840,8 @@ JsSIP.grammar = (function(){
         pos1 = pos;
         result0 = parse_transport();
         if (result0 !== null) {
-          if (input.substr(pos, 3) === "udp") {
-            result1 = "udp";
+          if (input.substr(pos, 3).toLowerCase() === "udp") {
+            result1 = input.substr(pos, 3);
             pos += 3;
           } else {
             result1 = null;
@@ -11850,8 +11850,8 @@ JsSIP.grammar = (function(){
             }
           }
           if (result1 === null) {
-            if (input.substr(pos, 3) === "tcp") {
-              result1 = "tcp";
+            if (input.substr(pos, 3).toLowerCase() === "tcp") {
+              result1 = input.substr(pos, 3);
               pos += 3;
             } else {
               result1 = null;
diff --git a/src/grammar/src/grammar.pegjs b/src/grammar/src/grammar.pegjs
index c93e1580b..d330daa62 100644
--- a/src/grammar/src/grammar.pegjs
+++ b/src/grammar/src/grammar.pegjs
@@ -96,7 +96,7 @@ SIP_URI_simple  = uri_scheme ":" userinfo ? hostport {
 SIP_URI         = uri_scheme ":"  userinfo ? hostport uri_parameters headers ? {
                     data.uri = input.substring(pos, offset); }
 
-uri_scheme      = uri_scheme:  "sip" {
+uri_scheme      = uri_scheme:  "sip"i {
                     data.scheme = uri_scheme; }
 
 userinfo        = user (":" password)? "@" {
@@ -174,32 +174,32 @@ uri_parameters    = ( ";" uri_parameter)*
 uri_parameter     = transport_param / user_param / method_param
                     / ttl_param / maddr_param / lr_param / other_param
 
-transport_param   = "transport=" transport: ( "udp" / "tcp" / "sctp"
-                    / "tls" / other_transport) {
+transport_param   = "transport="i transport: ( "udp"i / "tcp"i / "sctp"i
+                    / "tls"i / other_transport) {
                       if(!data.params) data.params={};
                       data.params['transport'] = transport; }
 
 other_transport   = token
 
-user_param        = "user=" user:( "phone" / "ip" / other_user) {
+user_param        = "user="i user:( "phone"i / "ip"i / other_user) {
                       if(!data.params) data.params={};
                       data.params['user'] = user; }
 
 other_user        = token
 
-method_param      = "method=" method: Method {
+method_param      = "method="i method: Method {
                       if(!data.params) data.params={};
                       data.params['method'] = method; }
 
-ttl_param         = "ttl=" ttl: ttl {
+ttl_param         = "ttl="i ttl: ttl {
                       if(!data.params) data.params={};
                       data.params['ttl'] = ttl; }
 
-maddr_param       = "maddr=" maddr: host {
+maddr_param       = "maddr="i maddr: host {
                       if(!data.params) data.params={};
                       data.params['maddr'] = maddr; }
 
-lr_param          = lr: "lr" {
+lr_param          = lr: "lr"i {
                       if(!data.params) data.params={};
                       data.params['lr'] = true; }
 
@@ -281,7 +281,7 @@ reg_name          = ( unreserved / escaped / "$" / ","
 
 query             = uric *
 
-SIP_Version       = "SIP" "/" DIGIT + "." DIGIT + {
+SIP_Version       = "SIP"i "/" DIGIT + "." DIGIT + {
                     data.sip_version = input.substring(pos, offset); }
 
 // SIP METHODS
@@ -355,11 +355,11 @@ display_name        = display_name: (token ( LWS token )* / quoted_string) {
 
 contact_params      = c_p_q / c_p_expires / contact_extension
 
-c_p_q               = "q" EQUAL q: qvalue {
+c_p_q               = "q"i EQUAL q: qvalue {
                         if(!data.params) data.params = {};
                         data.params['q'] = q; }
 
-c_p_expires         = "expires" EQUAL expires: delta_seconds {
+c_p_expires         = "expires"i EQUAL expires: delta_seconds {
                         if(!data.params) data.params = {};
                         data.params['expires'] = expires; }
 
@@ -392,11 +392,11 @@ gen_value           = token / host / quoted_string
 
 Content_Disposition     = disp_type ( SEMI disp_param )*
 
-disp_type               = "render" / "session" / "icon" / "alert" / disp_extension_token
+disp_type               = "render"i / "session"i / "icon"i / "alert"i / disp_extension_token
 
 disp_param              = handling_param / generic_param
 
-handling_param          = "handling" EQUAL ( "optional" / "required" / other_handling )
+handling_param          = "handling"i EQUAL ( "optional"i / "required"i / other_handling )
 
 other_handling          = token
 
@@ -424,16 +424,16 @@ media_type          = m_type SLASH m_subtype (SEMI m_parameter)*
 
 m_type              = discrete_type / composite_type
 
-discrete_type       = "text" / "image" / "audio" / "video" / "application"
+discrete_type       = "text"i / "image"i / "audio"i / "video"i / "application"i
                     / extension_token
 
-composite_type      = "message" / "multipart" / extension_token
+composite_type      = "message"i / "multipart"i / extension_token
 
 extension_token     = ietf_token / x_token
 
 ietf_token          = token
 
-x_token             = "x-" token
+x_token             = "x-"i token
 
 m_subtype           = extension_token / iana_token
 
@@ -486,7 +486,7 @@ From        = ( addr_spec_simple / name_addr ) ( SEMI from_param )*
 
 from_param  = tag_param / generic_param
 
-tag_param   = "tag" EQUAL tag: token {data.tag = tag; }
+tag_param   = "tag"i EQUAL tag: token {data.tag = tag; }
 
 
 //MAX-FORWARDS
@@ -504,7 +504,7 @@ Min_Expires  = min_expires: delta_seconds {data = min_expires; }
 
 Proxy_Authenticate  = proxy_authenticate: challenge
 
-challenge           = ("Digest" LWS digest_cln (COMMA digest_cln)*)
+challenge           = ("Digest"i LWS digest_cln (COMMA digest_cln)*)
                       / other_challenge
 
 other_challenge     = auth_scheme LWS auth_param (COMMA auth_param)*
@@ -518,33 +518,33 @@ auth_param_name     = token
 digest_cln          = realm / domain / nonce / opaque / stale / algorithm
                       / qop_options / auth_param
 
-realm               = "realm" EQUAL realm_value
+realm               = "realm"i EQUAL realm_value
 
 realm_value         = realm: quoted_string {data.realm = realm; }
 
-domain              = "domain" EQUAL LDQUOT URI ( SP+ URI )* RDQUOT
+domain              = "domain"i EQUAL LDQUOT URI ( SP+ URI )* RDQUOT
 
 URI                 = absoluteURI / abs_path
 
-nonce               = "nonce" EQUAL nonce_value
+nonce               = "nonce"i EQUAL nonce_value
 
 nonce_value         = nonce: quoted_string {data.nonce=nonce; }
 
-opaque              = "opaque" EQUAL opaque: quoted_string {
+opaque              = "opaque"i EQUAL opaque: quoted_string {
                         data.opaque=opaque; }
 
-stale               = "stale" EQUAL stale: ( "true" / "false" ) {
+stale               = "stale"i EQUAL stale: ( "true"i / "false"i ) {
                         data.stale=stale; }
 
-algorithm           = "algorithm" EQUAL algorithm: ( "MD5" / "MD5-sess"
+algorithm           = "algorithm"i EQUAL algorithm: ( "MD5"i / "MD5-sess"i
                       / token ) {
                       data.algorithm=algorithm; }
 
-qop_options         = "qop" EQUAL LDQUOT qop: (qop_value
+qop_options         = "qop"i EQUAL LDQUOT qop: (qop_value
                       ("," qop_value)*) RDQUOT {
                       data.qop= input.substring(pos-1, offset+5); }
 
-qop_value           = "auth-int" / "auth" / token
+qop_value           = "auth-int"i / "auth"i / token
 
 
 // PROXY-REQUIRE
@@ -579,17 +579,17 @@ route_param  = name_addr ( SEMI rr_param )*
 
 Subscription_State   = substate_value ( SEMI subexp_params )*
 
-substate_value       = ( "active" / "pending" / "terminated"
+substate_value       = ( "active"i / "pending"i / "terminated"i
                        / extension_substate ) {
                         data.state = input.substring(pos, offset); }
 
 extension_substate   = token
 
-subexp_params        = ("reason" EQUAL reason: event_reason_value) {
+subexp_params        = ("reason"i EQUAL reason: event_reason_value) {
                         if (typeof reason !== 'undefined') data.reason = reason; }
-                       / ("expires" EQUAL expires: delta_seconds) {
+                       / ("expires"i EQUAL expires: delta_seconds) {
                         if (typeof expires !== 'undefined') data.expires = expires; }
-                       / ("retry_after" EQUAL retry_after: delta_seconds) {
+                       / ("retry_after"i EQUAL retry_after: delta_seconds) {
                         if (typeof retry_after !== 'undefined') data.retry_after = retry_after; }
                        / g_p: generic_param {
                         if (typeof g_p !== 'undefined') {
@@ -598,13 +598,13 @@ subexp_params        = ("reason" EQUAL reason: event_reason_value) {
                           else data.params[g_p[0]] = true;
                        }; }
 
-event_reason_value   = "deactivated"
-                       / "probation"
-                       / "rejected"
-                       / "timeout"
-                       / "giveup"
-                       / "noresource"
-                       / "invariant"
+event_reason_value   = "deactivated"i
+                       / "probation"i
+                       / "rejected"i
+                       / "timeout"i
+                       / "giveup"i
+                       / "noresource"i
+                       / "invariant"i
                        / event_reason_extension
 
 event_reason_extension = token
@@ -635,19 +635,19 @@ via_parm          = sent_protocol LWS sent_by ( SEMI via_params )*
 
 via_params        = via_ttl / via_maddr / via_received / via_branch / response_port / via_extension
 
-via_ttl           = "ttl" EQUAL via_ttl_value: ttl {
+via_ttl           = "ttl"i EQUAL via_ttl_value: ttl {
                       data.ttl = via_ttl_value; }
 
-via_maddr         = "maddr" EQUAL via_maddr: host {
+via_maddr         = "maddr"i EQUAL via_maddr: host {
                       data.maddr = via_maddr; }
 
-via_received      = "received" EQUAL via_received: (IPv4address / IPv6address) {
+via_received      = "received"i EQUAL via_received: (IPv4address / IPv6address) {
                       data.received = via_received; }
 
-via_branch        = "branch" EQUAL via_branch: token {
+via_branch        = "branch"i EQUAL via_branch: token {
                       data.branch = via_branch; }
 
-response_port     = "rport" (EQUAL response_port: (DIGIT*) )? {
+response_port     = "rport"i (EQUAL response_port: (DIGIT*) )? {
                       if(typeof response_port !== 'undefined')
                         data.rport = response_port.join(""); }
 
@@ -655,12 +655,12 @@ via_extension     = generic_param
 
 sent_protocol     = protocol_name SLASH protocol_version SLASH transport
 
-protocol_name     = via_protocol: ( "SIP" / token ) {
+protocol_name     = via_protocol: ( "SIP"i / token ) {
                       data.protocol = via_protocol; }
 
 protocol_version  = token
 
-transport         = via_transport: ("UDP" / "TCP" / "TLS" / "SCTP" / other_transport) {
+transport         = via_transport: ("UDP"i / "TCP"i / "TLS"i / "SCTP"i / other_transport) {
                       data.transport = via_transport; }
 
 sent_by           = via_host ( COLON via_port )?
@@ -695,7 +695,7 @@ message_body      = OCTET*
 
 stun_URI          = stun_scheme ":" stun_host_port
 
-stun_scheme       = scheme: ("stuns" / "stun") {
+stun_scheme       = scheme: ("stuns"i / "stun"i) {
                       data.scheme = scheme; }
 
 stun_host_port    = stun_host ( ":" port )?
@@ -714,10 +714,10 @@ sub_delims        = "!" / "$" / "&" / "'" / "(" / ")" / "*" / "+" / "," / ";" /
 
 turn_URI          = turn_scheme ":" stun_host_port ( "?transport=" transport )?
 
-turn_scheme       = scheme: ("turns" / "turn") {
+turn_scheme       = scheme: ("turns"i / "turn"i) {
                       data.scheme = scheme; }
 
-turn_transport    = transport ("udp" / "tcp" / unreserved*) {
+turn_transport    = transport ("udp"i / "tcp"i / unreserved*) {
                       data.transport = transport; }