Support multiple ice connections

src/common/common.h

@@ -0,0 +1,33 @@
+#ifndef _COMMON_H_
+#define _COMMON_H_
+
+#include <iostream>
+
+constexpr size_t HASH_STRING_PIECE(const char *string_piece) {
+  std::size_t result = 0;
+  while (*string_piece) {
+    result = (result * 131) + *string_piece++;
+  }
+  return result;
+}
+
+constexpr size_t operator"" _H(const char *string_piece, size_t) {
+  return HASH_STRING_PIECE(string_piece);
+}
+
+inline const std::string GetIceUsername(const std::string &sdp) {
+  std::string result = "";
+
+  std::string start = "ice-ufrag:";
+  std::string end = "\r\n";
+  size_t startPos = sdp.find(start);
+  size_t endPos = sdp.find(end);
+
+  if (startPos != std::string::npos && endPos != std::string::npos) {
+    result = sdp.substr(startPos + start.length(),
+                        endPos - startPos - start.length());
+  }
+  return result;
+}
+
+#endif