Fix bug for subject

lib/rex/proto/mms/client.rb

@@ -60,7 +60,8 @@ module Rex
                   content_type: ctype,
                   attachment_path: attachment_path,
                   from: from,
-                  to: r
+                  to: r,
+                  subject: subject
                 )
                 smtp.send_message(mms_message.to_s, from, r)
               end

lib/rex/proto/mms/model/message.rb

@@ -49,6 +49,7 @@ module Rex
             self.from = opts[:from]
             self.to = opts[:to]
             self.message = opts[:message]
+            self.subject = opts[:subject]
             self.content_type = opts[:content_type]
             if opts[:attachment_path]
               self.attachment = load_file_to_base64(opts[:attachment_path])

spec/lib/rex/proto/mms/client_spec.rb

@@ -12,6 +12,8 @@ RSpec.describe Rex::Proto::Mms::Client do
 
   let(:file_content) { 'content' }
 
+  let(:subject) { 'subject' }
+
   let(:ctype) { 'ctype' }
 
   let(:carrier) { :verizon }
@@ -52,7 +54,7 @@ RSpec.describe Rex::Proto::Mms::Client do
     end
 
     it 'sends an mms message' do
-      subject.send_mms_to_phones(phone_numbers, message, attachment, ctype)
+      subject.send_mms_to_phones(phone_numbers, subject, message, attachment, ctype)
       expect(@sent_message).to include('MIME-Version: 1.0')
     end
   end