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-rw-r--r--src/network/core/address.cpp12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/network/core/address.cpp b/src/network/core/address.cpp
index 1aaa0b5fb..2e00b5b19 100644
--- a/src/network/core/address.cpp
+++ b/src/network/core/address.cpp
@@ -267,6 +267,18 @@ SOCKET NetworkAddress::Resolve(int family, int socktype, int flags, SocketList *
this->address_length = (int)runp->ai_addrlen;
assert(sizeof(this->address) >= runp->ai_addrlen);
memcpy(&this->address, runp->ai_addr, runp->ai_addrlen);
+#ifdef __EMSCRIPTEN__
+ /* Emscripten doesn't zero sin_zero, but as we compare addresses
+ * to see if they are the same address, we need them to be zero'd.
+ * Emscripten is, as far as we know, the only OS not doing this.
+ *
+ * https://github.com/emscripten-core/emscripten/issues/12998
+ */
+ if (this->address.ss_family == AF_INET) {
+ sockaddr_in *address_ipv4 = (sockaddr_in *)&this->address;
+ memset(address_ipv4->sin_zero, 0, sizeof(address_ipv4->sin_zero));
+ }
+#endif
break;
}