Add a "fork" of musl as //fusl.

fusl/src/network/getaddrinfo.c

Index: fusl/src/network/getaddrinfo.c
diff --git a/fusl/src/network/getaddrinfo.c b/fusl/src/network/getaddrinfo.c
new file mode 100644
index 0000000000000000000000000000000000000000..b9439f776fcebf41e00ed1e6fff674b7a42ea1be
--- /dev/null
+++ b/fusl/src/network/getaddrinfo.c
@@ -0,0 +1,92 @@
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <string.h>
+#include "lookup.h"
+
+int getaddrinfo(const char *restrict host, const char *restrict serv, const struct addrinfo *restrict hint, struct addrinfo **restrict res)
+{
+	struct service ports[MAXSERVS];
+	struct address addrs[MAXADDRS];
+	char canon[256], *outcanon;
+	int nservs, naddrs, nais, canon_len, i, j, k;
+	int family = AF_UNSPEC, flags = 0, proto = 0, socktype = 0;
+	struct aibuf {
+		struct addrinfo ai;
+		union sa {
+			struct sockaddr_in sin;
+			struct sockaddr_in6 sin6;
+		} sa;
+	} *out;
+
+	if (!host && !serv) return EAI_NONAME;
+
+	if (hint) {
+		family = hint->ai_family;
+		flags = hint->ai_flags;
+		proto = hint->ai_protocol;
+		socktype = hint->ai_socktype;
+
+		const int mask = AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST |
+			AI_V4MAPPED | AI_ALL | AI_ADDRCONFIG | AI_NUMERICSERV;
+		if ((flags & mask) != flags)
+			return EAI_BADFLAGS;
+
+		switch (family) {
+		case AF_INET:
+		case AF_INET6:
+		case AF_UNSPEC:
+			break;
+		default:
+			return EAI_FAMILY;
+		}
+	}
+
+	nservs = __lookup_serv(ports, serv, proto, socktype, flags);
+	if (nservs < 0) return nservs;
+
+	naddrs = __lookup_name(addrs, canon, host, family, flags);
+	if (naddrs < 0) return naddrs;
+
+	nais = nservs * naddrs;
+	canon_len = strlen(canon);
+	out = calloc(1, nais * sizeof(*out) + canon_len + 1);
+	if (!out) return EAI_MEMORY;
+
+	if (canon_len) {
+		outcanon = (void *)&out[nais];
+		memcpy(outcanon, canon, canon_len+1);
+	} else {
+		outcanon = 0;
+	}
+
+	for (k=i=0; i<naddrs; i++) for (j=0; j<nservs; j++, k++) {
+		out[k].ai = (struct addrinfo){
+			.ai_family = addrs[i].family,
+			.ai_socktype = ports[j].socktype,
+			.ai_protocol = ports[j].proto,
+			.ai_addrlen = addrs[i].family == AF_INET
+				? sizeof(struct sockaddr_in)
+				: sizeof(struct sockaddr_in6),
+			.ai_addr = (void *)&out[k].sa,
+			.ai_canonname = outcanon,
+			.ai_next = &out[k+1].ai };
+		switch (addrs[i].family) {
+		case AF_INET:
+			out[k].sa.sin.sin_family = AF_INET;
+			out[k].sa.sin.sin_port = htons(ports[j].port);
+			memcpy(&out[k].sa.sin.sin_addr, &addrs[i].addr, 4);
+			break;
+		case AF_INET6:
+			out[k].sa.sin6.sin6_family = AF_INET6;
+			out[k].sa.sin6.sin6_port = htons(ports[j].port);
+			out[k].sa.sin6.sin6_scope_id = addrs[i].scopeid;
+			memcpy(&out[k].sa.sin6.sin6_addr, &addrs[i].addr, 16);
+			break;			
+		}
+	}
+	out[nais-1].ai.ai_next = 0;
+	*res = &out->ai;
+	return 0;
+}