diff --git a/fusl/src/network/accept.c b/fusl/src/network/accept.c
new file mode 100644
index 0000000..521e9ef
--- /dev/null
+++ b/fusl/src/network/accept.c
@@ -0,0 +1,8 @@
+#include <sys/socket.h>
+#include "syscall.h"
+#include "libc.h"
+
+int accept(int fd, struct sockaddr *restrict addr, socklen_t *restrict len)
+{
+	return socketcall_cp(accept, fd, addr, len, 0, 0, 0);
+}
diff --git a/fusl/src/network/accept4.c b/fusl/src/network/accept4.c
new file mode 100644
index 0000000..285d858
--- /dev/null
+++ b/fusl/src/network/accept4.c
@@ -0,0 +1,20 @@
+#define _GNU_SOURCE
+#include <sys/socket.h>
+#include <errno.h>
+#include <fcntl.h>
+#include "syscall.h"
+#include "libc.h"
+
+int accept4(int fd, struct sockaddr *restrict addr, socklen_t *restrict len, int flg)
+{
+	if (!flg) return accept(fd, addr, len);
+	int ret = socketcall_cp(accept4, fd, addr, len, flg, 0, 0);
+	if (ret>=0 || (errno != ENOSYS && errno != EINVAL)) return ret;
+	ret = accept(fd, addr, len);
+	if (ret<0) return ret;
+	if (flg & SOCK_CLOEXEC)
+		__syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
+	if (flg & SOCK_NONBLOCK)
+		__syscall(SYS_fcntl, ret, F_SETFL, O_NONBLOCK);
+	return ret;
+}
diff --git a/fusl/src/network/bind.c b/fusl/src/network/bind.c
new file mode 100644
index 0000000..07bb669a
--- /dev/null
+++ b/fusl/src/network/bind.c
@@ -0,0 +1,7 @@
+#include <sys/socket.h>
+#include "syscall.h"
+
+int bind(int fd, const struct sockaddr *addr, socklen_t len)
+{
+	return socketcall(bind, fd, addr, len, 0, 0, 0);
+}
diff --git a/fusl/src/network/connect.c b/fusl/src/network/connect.c
new file mode 100644
index 0000000..57f01a1
--- /dev/null
+++ b/fusl/src/network/connect.c
@@ -0,0 +1,8 @@
+#include <sys/socket.h>
+#include "syscall.h"
+#include "libc.h"
+
+int connect(int fd, const struct sockaddr *addr, socklen_t len)
+{
+	return socketcall_cp(connect, fd, addr, len, 0, 0, 0);
+}
diff --git a/fusl/src/network/dn_comp.c b/fusl/src/network/dn_comp.c
new file mode 100644
index 0000000..a17d434
--- /dev/null
+++ b/fusl/src/network/dn_comp.c
@@ -0,0 +1,110 @@
+#include <string.h>
+#include <resolv.h>
+#include "libc.h"
+
+/* RFC 1035 message compression */
+
+/* label start offsets of a compressed domain name s */
+static int getoffs(short *offs, const unsigned char *base, const unsigned char *s)
+{
+	int i=0;
+	for (;;) {
+		while (*s & 0xc0) {
+			if ((*s & 0xc0) != 0xc0) return 0;
+			s = base + ((s[0]&0x3f)<<8 | s[1]);
+		}
+		if (!*s) return i;
+		if (s-base >= 0x4000) return 0;
+		offs[i++] = s-base;
+		s += *s + 1;
+	}
+}
+
+/* label lengths of an ascii domain name s */
+static int getlens(unsigned char *lens, const char *s, int l)
+{
+	int i=0,j=0,k=0;
+	for (;;) {
+		for (; j<l && s[j]!='.'; j++);
+		if (j-k-1u > 62) return 0;
+		lens[i++] = j-k;
+		if (j==l) return i;
+		k = ++j;
+	}
+}
+
+/* longest suffix match of an ascii domain with a compressed domain name dn */
+static int match(int *offset, const unsigned char *base, const unsigned char *dn,
+	const char *end, const unsigned char *lens, int nlen)
+{
+	int l, o, m=0;
+	short offs[128];
+	int noff = getoffs(offs, base, dn);
+	if (!noff) return 0;
+	for (;;) {
+		l = lens[--nlen];
+		o = offs[--noff];
+		end -= l;
+		if (l != base[o] || memcmp(base+o+1, end, l))
+			return m;
+		*offset = o;
+		m += l;
+		if (nlen) m++;
+		if (!nlen || !noff) return m;
+		end--;
+	}
+}
+
+int __dn_comp(const char *src, unsigned char *dst, int space, unsigned char **dnptrs, unsigned char **lastdnptr)
+{
+	int i, j, n, m=0, offset, bestlen=0, bestoff;
+	unsigned char lens[127];
+	unsigned char **p;
+	const char *end;
+	size_t l = strnlen(src, 255);
+	if (l && src[l-1] == '.') l--;
+	if (l>253 || space<=0) return -1;
+	if (!l) {
+		*dst = 0;
+		return 1;
+	}
+	end = src+l;
+	n = getlens(lens, src, l);
+	if (!n) return -1;
+
+	p = dnptrs;
+	if (p && *p) for (p++; *p; p++) {
+		m = match(&offset, *dnptrs, *p, end, lens, n);
+		if (m > bestlen) {
+			bestlen = m;
+			bestoff = offset;
+			if (m == l)
+				break;
+		}
+	}
+
+	/* encode unmatched part */
+	if (space < l-bestlen+2+(bestlen-1 < l-1)) return -1;
+	memcpy(dst+1, src, l-bestlen);
+	for (i=j=0; i<l-bestlen; i+=lens[j++]+1)
+		dst[i] = lens[j];
+
+	/* add tail */
+	if (bestlen) {
+		dst[i++] = 0xc0 | bestoff>>8;
+		dst[i++] = bestoff;
+	} else
+		dst[i++] = 0;
+
+	/* save dst pointer */
+	if (i>2 && lastdnptr && dnptrs && *dnptrs) {
+		while (*p) p++;
+		if (p+1 < lastdnptr) {
+			*p++ = dst;
+			*p=0;
+		}
+	}
+	return i;
+}
+
+weak_alias(__dn_comp, dn_comp);
diff --git a/fusl/src/network/dn_expand.c b/fusl/src/network/dn_expand.c
new file mode 100644
index 0000000..d9b3393
--- /dev/null
+++ b/fusl/src/network/dn_expand.c
@@ -0,0 +1,34 @@
+#include <resolv.h>
+#include "libc.h"
+
+int __dn_expand(const unsigned char *base, const unsigned char *end, const unsigned char *src, char *dest, int space)
+{
+	const unsigned char *p = src;
+	char *dend, *dbegin = dest;
+	int len = -1, i, j;
+	if (p==end || space <= 0) return -1;
+	dend = dest + (space > 254 ? 254 : space);
+	/* detect reference loop using an iteration counter */
+	for (i=0; i < end-base; i+=2) {
+		/* loop invariants: p<end, dest<dend */
+		if (*p & 0xc0) {
+			if (p+1==end) return -1;
+			j = ((p[0] & 0x3f) << 8) | p[1];
+			if (len < 0) len = p+2-src;
+			if (j >= end-base) return -1;
+			p = base+j;
+		} else if (*p) {
+			if (dest != dbegin) *dest++ = '.';
+			j = *p++;
+			if (j >= end-p || j >= dend-dest) return -1;
+			while (j--) *dest++ = *p++;
+		} else {
+			*dest = 0;
+			if (len < 0) len = p+1-src;
+			return len;
+		}
+	}
+	return -1;
+}
+
+weak_alias(__dn_expand, dn_expand);
diff --git a/fusl/src/network/dn_skipname.c b/fusl/src/network/dn_skipname.c
new file mode 100644
index 0000000..d54c2e5
--- /dev/null
+++ b/fusl/src/network/dn_skipname.c
@@ -0,0 +1,12 @@
+#include <resolv.h>
+
+int dn_skipname(const unsigned char *s, const unsigned char *end)
+{
+	const unsigned char *p;
+	for (p=s; p<end; p++)
+		if (!*p) return p-s+1;
+		else if (*p>=192)
+			if (p+1<end) return p-s+2;
+			else break;
+	return -1;
+}
diff --git a/fusl/src/network/dns_parse.c b/fusl/src/network/dns_parse.c
new file mode 100644
index 0000000..0c7a601
--- /dev/null
+++ b/fusl/src/network/dns_parse.c
@@ -0,0 +1,32 @@
+#include <string.h>
+
+int __dns_parse(const unsigned char *r, int rlen, int (*callback)(void *, int, const void *, int, const void *), void *ctx)
+{
+	int qdcount, ancount;
+	const unsigned char *p;
+	int len;
+
+	if (rlen<12) return -1;
+	if ((r[3]&15)) return 0;
+	p = r+12;
+	qdcount = r[4]*256 + r[5];
+	ancount = r[6]*256 + r[7];
+	if (qdcount+ancount > 64) return -1;
+	while (qdcount--) {
+		while (p-r < rlen && *p-1U < 127) p++;
+		if (*p>193 || (*p==193 && p[1]>254) || p>r+rlen-6)
+			return -1;
+		p += 5 + !!*p;
+	}
+	while (ancount--) {
+		while (p-r < rlen && *p-1U < 127) p++;
+		if (*p>193 || (*p==193 && p[1]>254) || p>r+rlen-6)
+			return -1;
+		p += 1 + !!*p;
+		len = p[8]*256 + p[9];
+		if (p+len > r+rlen) return -1;
+		if (callback(ctx, p[1], p+10, len, r) < 0) return -1;
+		p += 10 + len;
+	}
+	return 0;
+}
diff --git a/fusl/src/network/ent.c b/fusl/src/network/ent.c
new file mode 100644
index 0000000..ececdc4
--- /dev/null
+++ b/fusl/src/network/ent.c
@@ -0,0 +1,18 @@
+#include "libc.h"
+
+void sethostent(int x)
+{
+}
+
+void *gethostent()
+{
+	return 0;
+}
+
+void endhostent(void)
+{
+}
+
+weak_alias(sethostent, setnetent);
+weak_alias(gethostent, getnetent);
+weak_alias(endhostent, endnetent);
diff --git a/fusl/src/network/ether.c b/fusl/src/network/ether.c
new file mode 100644
index 0000000..4304a97
--- /dev/null
+++ b/fusl/src/network/ether.c
@@ -0,0 +1,58 @@
+#include <stdlib.h>
+#include <netinet/ether.h>
+#include <stdio.h>
+
+struct ether_addr *ether_aton_r (const char *x, struct ether_addr *p_a)
+{
+	struct ether_addr a;
+	char *y;
+	for (int ii = 0; ii < 6; ii++) {
+		unsigned long int n;
+		if (ii != 0) {
+			if (x[0] != ':') return 0; /* bad format */
+			else x++;
+		}
+		n = strtoul (x, &y, 16);
+		x = y;
+		if (n > 0xFF) return 0; /* bad byte */
+		a.ether_addr_octet[ii] = n;
+	}
+	if (x[0] != 0) return 0; /* bad format */
+	*p_a = a;
+	return p_a;
+}
+
+struct ether_addr *ether_aton (const char *x)
+{
+	static struct ether_addr a;
+	return ether_aton_r (x, &a);
+}
+
+char *ether_ntoa_r (const struct ether_addr *p_a, char *x) {
+	char *y;
+	y = x;
+	for (int ii = 0; ii < 6; ii++) {
+		x += sprintf (x, ii == 0 ? "%.2X" : ":%.2X", p_a->ether_addr_octet[ii]);
+	}
+	return y;
+}
+
+char *ether_ntoa (const struct ether_addr *p_a) {
+	static char x[18];
+	return ether_ntoa_r (p_a, x);
+}
+
+int ether_line(const char *l, struct ether_addr *e, char *hostname)
+{
+	return -1;
+}
+
+int ether_ntohost(char *hostname, const struct ether_addr *e)
+{
+	return -1;
+}
+
+int ether_hostton(const char *hostname, struct ether_addr *e)
+{
+	return -1;
+}
diff --git a/fusl/src/network/freeaddrinfo.c b/fusl/src/network/freeaddrinfo.c
new file mode 100644
index 0000000..df3798a
--- /dev/null
+++ b/fusl/src/network/freeaddrinfo.c
@@ -0,0 +1,7 @@
+#include <stdlib.h>
+#include <netdb.h>
+
+void freeaddrinfo(struct addrinfo *p)
+{
+	free(p);
+}
diff --git a/fusl/src/network/gai_strerror.c b/fusl/src/network/gai_strerror.c
new file mode 100644
index 0000000..9596580
--- /dev/null
+++ b/fusl/src/network/gai_strerror.c
@@ -0,0 +1,25 @@
+#include <netdb.h>
+#include "locale_impl.h"
+
+static const char msgs[] =
+	"Invalid flags\0"
+	"Name does not resolve\0"
+	"Try again\0"
+	"Non-recoverable error\0"
+	"Unknown error\0"
+	"Unrecognized address family or invalid length\0"
+	"Unrecognized socket type\0"
+	"Unrecognized service\0"
+	"Unknown error\0"
+	"Out of memory\0"
+	"System error\0"
+	"Overflow\0"
+	"\0Unknown error";
+
+const char *gai_strerror(int ecode)
+{
+	const char *s;
+	for (s=msgs, ecode++; ecode && *s; ecode++, s++) for (; *s; s++);
+	if (!*s) s++;
+	return LCTRANS_CUR(s);
+}
diff --git a/fusl/src/network/getaddrinfo.c b/fusl/src/network/getaddrinfo.c
new file mode 100644
index 0000000..b9439f7
--- /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;
+}
diff --git a/fusl/src/network/gethostbyaddr.c b/fusl/src/network/gethostbyaddr.c
new file mode 100644
index 0000000..598e224
--- /dev/null
+++ b/fusl/src/network/gethostbyaddr.c
@@ -0,0 +1,24 @@
+#define _GNU_SOURCE
+
+#include <netdb.h>
+#include <errno.h>
+#include <stdlib.h>
+
+struct hostent *gethostbyaddr(const void *a, socklen_t l, int af)
+{
+	static struct hostent *h;
+	size_t size = 63;
+	struct hostent *res;
+	int err;
+	do {
+		free(h);
+		h = malloc(size+=size+1);
+		if (!h) {
+			h_errno = NO_RECOVERY;
+			return 0;
+		}
+		err = gethostbyaddr_r(a, l, af, h,
+			(void *)(h+1), size-sizeof *h, &res, &h_errno);
+	} while (err == ERANGE);
+	return err ? 0 : h;
+}
diff --git a/fusl/src/network/gethostbyaddr_r.c b/fusl/src/network/gethostbyaddr_r.c
new file mode 100644
index 0000000..66e0330
--- /dev/null
+++ b/fusl/src/network/gethostbyaddr_r.c
@@ -0,0 +1,70 @@
+#define _GNU_SOURCE
+
+#include <sys/socket.h>
+#include <netdb.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <errno.h>
+#include <inttypes.h>
+
+int gethostbyaddr_r(const void *a, socklen_t l, int af,
+	struct hostent *h, char *buf, size_t buflen,
+	struct hostent **res, int *err)
+{
+	union {
+		struct sockaddr_in sin;
+		struct sockaddr_in6 sin6;
+	} sa = { .sin.sin_family = af };
+	socklen_t sl = af==AF_INET6 ? sizeof sa.sin6 : sizeof sa.sin;
+	int i;
+
+	*res = 0;
+
+	/* Load address argument into sockaddr structure */
+	if (af==AF_INET6 && l==16) memcpy(&sa.sin6.sin6_addr, a, 16);
+	else if (af==AF_INET && l==4) memcpy(&sa.sin.sin_addr, a, 4);
+	else {
+		*err = NO_RECOVERY;
+		return EINVAL;
+	}
+
+	/* Align buffer and check for space for pointers and ip address */
+	i = (uintptr_t)buf & sizeof(char *)-1;
+	if (!i) i = sizeof(char *);
+	if (buflen <= 5*sizeof(char *)-i + l) return ERANGE;
+	buf += sizeof(char *)-i;
+	buflen -= 5*sizeof(char *)-i + l;
+
+	h->h_addr_list = (void *)buf;
+	buf += 2*sizeof(char *);
+	h->h_aliases = (void *)buf;
+	buf += 2*sizeof(char *);
+
+	h->h_addr_list[0] = buf;
+	memcpy(h->h_addr_list[0], a, l);
+	buf += l;
+	h->h_addr_list[1] = 0;
+	h->h_aliases[0] = buf;
+	h->h_aliases[1] = 0;
+
+	switch (getnameinfo((void *)&sa, sl, buf, buflen, 0, 0, 0)) {
+	case EAI_AGAIN:
+		*err = TRY_AGAIN;
+		return EAGAIN;
+	case EAI_OVERFLOW:
+		return ERANGE;
+	default:
+	case EAI_MEMORY:
+	case EAI_SYSTEM:
+	case EAI_FAIL:
+		*err = NO_RECOVERY;
+		return errno;
+	case 0:
+		break;
+	}
+
+	h->h_addrtype = af;
+	h->h_name = h->h_aliases[0];
+	*res = h;
+	return 0;
+}
diff --git a/fusl/src/network/gethostbyname.c b/fusl/src/network/gethostbyname.c
new file mode 100644
index 0000000..5088a51
--- /dev/null
+++ b/fusl/src/network/gethostbyname.c
@@ -0,0 +1,63 @@
+#define _GNU_SOURCE
+
+#include <sys/socket.h>
+#include <netdb.h>
+#include <string.h>
+#include <netinet/in.h>
+
+struct hostent *gethostbyname(const char *name)
+{
+	return gethostbyname2(name, AF_INET);
+}
+
+#if 0
+struct hostent *gethostbyname(const char *name)
+{
+	static struct hostent h;
+	static char *h_aliases[3];
+	static char h_canon[256];
+	static char *h_addr_list[10];
+	static char h_addr_data[10][4];
+	static const struct addrinfo hint = {
+		.ai_family = AF_INET, .ai_flags = AI_CANONNAME
+	};
+	struct addrinfo *ai, *p;
+	int i;
+
+	switch (getaddrinfo(name, 0, &hint, &ai)) {
+	case EAI_NONAME:
+		h_errno = HOST_NOT_FOUND;
+		break;
+	case EAI_AGAIN:
+		h_errno = TRY_AGAIN;
+		break;
+	case EAI_FAIL:
+		h_errno = NO_RECOVERY;
+		break;
+	default:
+	case EAI_MEMORY:
+	case EAI_SYSTEM:
+		h_errno = NO_DATA;
+		break;
+	case 0:
+		break;
+	}
+
+	strcpy(h_canon, ai->ai_canonname);
+	h.h_name = h_canon;
+	h.h_aliases = h_aliases;
+	h.h_aliases[0] = h_canon;
+	h.h_aliases[1] = strcmp(h_canon, name) ? (char *)name : 0;
+	h.h_length = 4;
+	h.h_addr_list = h_addr_list;
+	for (i=0, p=ai; i<sizeof h_addr_data/4 && p; i++, p=p->ai_next) {
+		h.h_addr_list[i] = h_addr_data[i];
+		memcpy(h.h_addr_list[i],
+			&((struct sockaddr_in *)p->ai_addr)->sin_addr, 4);
+	}
+	h.h_addr_list[i] = 0;
+	h.h_addrtype = AF_INET;
+	freeaddrinfo(ai);
+	return &h;
+}
+#endif
diff --git a/fusl/src/network/gethostbyname2.c b/fusl/src/network/gethostbyname2.c
new file mode 100644
index 0000000..dc9d662
--- /dev/null
+++ b/fusl/src/network/gethostbyname2.c
@@ -0,0 +1,25 @@
+#define _GNU_SOURCE
+
+#include <sys/socket.h>
+#include <netdb.h>
+#include <errno.h>
+#include <stdlib.h>
+
+struct hostent *gethostbyname2(const char *name, int af)
+{
+	static struct hostent *h;
+	size_t size = 63;
+	struct hostent *res;
+	int err;
+	do {
+		free(h);
+		h = malloc(size+=size+1);
+		if (!h) {
+			h_errno = NO_RECOVERY;
+			return 0;
+		}
+		err = gethostbyname2_r(name, af, h,
+			(void *)(h+1), size-sizeof *h, &res, &h_errno);
+	} while (err == ERANGE);
+	return err ? 0 : h;
+}
diff --git a/fusl/src/network/gethostbyname2_r.c b/fusl/src/network/gethostbyname2_r.c
new file mode 100644
index 0000000..81f71d2
--- /dev/null
+++ b/fusl/src/network/gethostbyname2_r.c
@@ -0,0 +1,82 @@
+#define _GNU_SOURCE
+
+#include <sys/socket.h>
+#include <netdb.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <errno.h>
+#include <stdint.h>
+#include "lookup.h"
+
+int gethostbyname2_r(const char *name, int af,
+	struct hostent *h, char *buf, size_t buflen,
+	struct hostent **res, int *err)
+{
+	struct address addrs[MAXADDRS];
+	char canon[256];
+	int i, cnt;
+	size_t align, need;
+
+	*res = 0;
+	cnt = __lookup_name(addrs, canon, name, af, AI_CANONNAME);
+	if (cnt<0) switch (cnt) {
+	case EAI_NONAME:
+		*err = HOST_NOT_FOUND;
+		return ENOENT;
+	case EAI_AGAIN:
+		*err = TRY_AGAIN;
+		return EAGAIN;
+	default:
+	case EAI_FAIL:
+		*err = NO_RECOVERY;
+		return EBADMSG;
+	case EAI_MEMORY:
+	case EAI_SYSTEM:
+		*err = NO_RECOVERY;
+		return errno;
+	case 0:
+		break;
+	}
+
+	h->h_addrtype = af;
+	h->h_length = af==AF_INET6 ? 16 : 4;
+
+	/* Align buffer */
+	align = -(uintptr_t)buf & sizeof(char *)-1;
+
+	need = 4*sizeof(char *);
+	need += (cnt + 1) * (sizeof(char *) + h->h_length);
+	need += strlen(name)+1;
+	need += strlen(canon)+1;
+	need += align;
+
+	if (need > buflen) return ERANGE;
+
+	buf += align;
+	h->h_aliases = (void *)buf;
+	buf += 3*sizeof(char *);
+	h->h_addr_list = (void *)buf;
+	buf += (cnt+1)*sizeof(char *);
+
+	h->h_name = h->h_aliases[0] = buf;
+	strcpy(h->h_name, canon);
+	buf += strlen(h->h_name)+1;
+
+	if (strcmp(h->h_name, name)) {
+		h->h_aliases[1] = buf;
+		strcpy(h->h_aliases[1], name);
+		buf += strlen(h->h_aliases[1])+1;
+	} else h->h_aliases[1] = 0;
+
+	h->h_aliases[2] = 0;
+
+	for (i=0; i<cnt; i++) {
+		h->h_addr_list[i] = (void *)buf;
+		buf += h->h_length;
+		memcpy(h->h_addr_list[i], addrs[i].addr, h->h_length);
+	}
+	h->h_addr_list[i] = 0;
+
+	*res = h;
+	return 0;
+}
diff --git a/fusl/src/network/gethostbyname_r.c b/fusl/src/network/gethostbyname_r.c
new file mode 100644
index 0000000..cd87254
--- /dev/null
+++ b/fusl/src/network/gethostbyname_r.c
@@ -0,0 +1,11 @@
+#define _GNU_SOURCE
+
+#include <sys/socket.h>
+#include <netdb.h>
+
+int gethostbyname_r(const char *name,
+	struct hostent *h, char *buf, size_t buflen,
+	struct hostent **res, int *err)
+{
+	return gethostbyname2_r(name, AF_INET, h, buf, buflen, res, err);
+}
diff --git a/fusl/src/network/getifaddrs.c b/fusl/src/network/getifaddrs.c
new file mode 100644
index 0000000..fed75bd
--- /dev/null
+++ b/fusl/src/network/getifaddrs.c
@@ -0,0 +1,216 @@
+#define _GNU_SOURCE
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <ifaddrs.h>
+#include <syscall.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include "netlink.h"
+
+#define IFADDRS_HASH_SIZE 64
+
+/* getifaddrs() reports hardware addresses with PF_PACKET that implies
+ * struct sockaddr_ll.  But e.g. Infiniband socket address length is
+ * longer than sockaddr_ll.ssl_addr[8] can hold. Use this hack struct
+ * to extend ssl_addr - callers should be able to still use it. */
+struct sockaddr_ll_hack {
+	unsigned short sll_family, sll_protocol;
+	int sll_ifindex;
+	unsigned short sll_hatype;
+	unsigned char sll_pkttype, sll_halen;
+	unsigned char sll_addr[24];
+};
+
+union sockany {
+	struct sockaddr sa;
+	struct sockaddr_ll_hack ll;
+	struct sockaddr_in v4;
+	struct sockaddr_in6 v6;
+};
+
+struct ifaddrs_storage {
+	struct ifaddrs ifa;
+	struct ifaddrs_storage *hash_next;
+	union sockany addr, netmask, ifu;
+	unsigned int index;
+	char name[IFNAMSIZ+1];
+};
+
+struct ifaddrs_ctx {
+	struct ifaddrs_storage *first;
+	struct ifaddrs_storage *last;
+	struct ifaddrs_storage *hash[IFADDRS_HASH_SIZE];
+};
+
+void freeifaddrs(struct ifaddrs *ifp)
+{
+	struct ifaddrs *n;
+	while (ifp) {
+		n = ifp->ifa_next;
+		free(ifp);
+		ifp = n;
+	}
+}
+
+static void copy_addr(struct sockaddr **r, int af, union sockany *sa, void *addr, size_t addrlen, int ifindex)
+{
+	uint8_t *dst;
+	int len;
+
+	switch (af) {
+	case AF_INET:
+		dst = (uint8_t*) &sa->v4.sin_addr;
+		len = 4;
+		break;
+	case AF_INET6:
+		dst = (uint8_t*) &sa->v6.sin6_addr;
+		len = 16;
+		if (IN6_IS_ADDR_LINKLOCAL(addr) || IN6_IS_ADDR_MC_LINKLOCAL(addr))
+			sa->v6.sin6_scope_id = ifindex;
+		break;
+	default:
+		return;
+	}
+	if (addrlen < len) return;
+	sa->sa.sa_family = af;
+	memcpy(dst, addr, len);
+	*r = &sa->sa;
+}
+
+static void gen_netmask(struct sockaddr **r, int af, union sockany *sa, int prefixlen)
+{
+	uint8_t addr[16] = {0};
+	int i;
+
+	if (prefixlen > 8*sizeof(addr)) prefixlen = 8*sizeof(addr);
+	i = prefixlen / 8;
+	memset(addr, 0xff, i);
+	if (i < sizeof(addr)) addr[i++] = 0xff << (8 - (prefixlen % 8));
+	copy_addr(r, af, sa, addr, sizeof(addr), 0);
+}
+
+static void copy_lladdr(struct sockaddr **r, union sockany *sa, void *addr, size_t addrlen, int ifindex, unsigned short hatype)
+{
+	if (addrlen > sizeof(sa->ll.sll_addr)) return;
+	sa->ll.sll_family = AF_PACKET;
+	sa->ll.sll_ifindex = ifindex;
+	sa->ll.sll_hatype = hatype;
+	sa->ll.sll_halen = addrlen;
+	memcpy(sa->ll.sll_addr, addr, addrlen);
+	*r = &sa->sa;
+}
+
+static int netlink_msg_to_ifaddr(void *pctx, struct nlmsghdr *h)
+{
+	struct ifaddrs_ctx *ctx = pctx;
+	struct ifaddrs_storage *ifs, *ifs0;
+	struct ifinfomsg *ifi = NLMSG_DATA(h);
+	struct ifaddrmsg *ifa = NLMSG_DATA(h);
+	struct rtattr *rta;
+	int stats_len = 0;
+
+	if (h->nlmsg_type == RTM_NEWLINK) {
+		for (rta = NLMSG_RTA(h, sizeof(*ifi)); NLMSG_RTAOK(rta, h); rta = RTA_NEXT(rta)) {
+			if (rta->rta_type != IFLA_STATS) continue;
+			stats_len = RTA_DATALEN(rta);
+			break;
+		}
+	} else {
+		for (ifs0 = ctx->hash[ifa->ifa_index % IFADDRS_HASH_SIZE]; ifs0; ifs0 = ifs0->hash_next)
+			if (ifs0->index == ifa->ifa_index)
+				break;
+		if (!ifs0) return 0;
+	}
+
+	ifs = calloc(1, sizeof(struct ifaddrs_storage) + stats_len);
+	if (ifs == 0) return -1;
+
+	if (h->nlmsg_type == RTM_NEWLINK) {
+		ifs->index = ifi->ifi_index;
+		ifs->ifa.ifa_flags = ifi->ifi_flags;
+
+		for (rta = NLMSG_RTA(h, sizeof(*ifi)); NLMSG_RTAOK(rta, h); rta = RTA_NEXT(rta)) {
+			switch (rta->rta_type) {
+			case IFLA_IFNAME:
+				if (RTA_DATALEN(rta) < sizeof(ifs->name)) {
+					memcpy(ifs->name, RTA_DATA(rta), RTA_DATALEN(rta));
+					ifs->ifa.ifa_name = ifs->name;
+				}
+				break;
+			case IFLA_ADDRESS:
+				copy_lladdr(&ifs->ifa.ifa_addr, &ifs->addr, RTA_DATA(rta), RTA_DATALEN(rta), ifi->ifi_index, ifi->ifi_type);
+				break;
+			case IFLA_BROADCAST:
+				copy_lladdr(&ifs->ifa.ifa_broadaddr, &ifs->ifu, RTA_DATA(rta), RTA_DATALEN(rta), ifi->ifi_index, ifi->ifi_type);
+				break;
+			case IFLA_STATS:
+				ifs->ifa.ifa_data = (void*)(ifs+1);
+				memcpy(ifs->ifa.ifa_data, RTA_DATA(rta), RTA_DATALEN(rta));
+				break;
+			}
+		}
+		if (ifs->ifa.ifa_name) {
+			unsigned int bucket = ifs->index % IFADDRS_HASH_SIZE;
+			ifs->hash_next = ctx->hash[bucket];
+			ctx->hash[bucket] = ifs;
+		}
+	} else {
+		ifs->ifa.ifa_name = ifs0->ifa.ifa_name;
+		ifs->ifa.ifa_flags = ifs0->ifa.ifa_flags;
+		for (rta = NLMSG_RTA(h, sizeof(*ifa)); NLMSG_RTAOK(rta, h); rta = RTA_NEXT(rta)) {
+			switch (rta->rta_type) {
+			case IFA_ADDRESS:
+				/* If ifa_addr is already set we, received an IFA_LOCAL before
+				 * so treat this as destination address */
+				if (ifs->ifa.ifa_addr)
+					copy_addr(&ifs->ifa.ifa_dstaddr, ifa->ifa_family, &ifs->ifu, RTA_DATA(rta), RTA_DATALEN(rta), ifa->ifa_index);
+				else
+					copy_addr(&ifs->ifa.ifa_addr, ifa->ifa_family, &ifs->addr, RTA_DATA(rta), RTA_DATALEN(rta), ifa->ifa_index);
+				break;
+			case IFA_BROADCAST:
+				copy_addr(&ifs->ifa.ifa_broadaddr, ifa->ifa_family, &ifs->ifu, RTA_DATA(rta), RTA_DATALEN(rta), ifa->ifa_index);
+				break;
+			case IFA_LOCAL:
+				/* If ifa_addr is set and we get IFA_LOCAL, assume we have
+				 * a point-to-point network. Move address to correct field. */
+				if (ifs->ifa.ifa_addr) {
+					ifs->ifu = ifs->addr;
+					ifs->ifa.ifa_dstaddr = &ifs->ifu.sa;
+					memset(&ifs->addr, 0, sizeof(ifs->addr));
+				}
+				copy_addr(&ifs->ifa.ifa_addr, ifa->ifa_family, &ifs->addr, RTA_DATA(rta), RTA_DATALEN(rta), ifa->ifa_index);
+				break;
+			case IFA_LABEL:
+				if (RTA_DATALEN(rta) < sizeof(ifs->name)) {
+					memcpy(ifs->name, RTA_DATA(rta), RTA_DATALEN(rta));
+					ifs->ifa.ifa_name = ifs->name;
+				}
+				break;
+			}
+		}
+		if (ifs->ifa.ifa_addr)
+			gen_netmask(&ifs->ifa.ifa_netmask, ifa->ifa_family, &ifs->netmask, ifa->ifa_prefixlen);
+	}
+
+	if (ifs->ifa.ifa_name) {
+		if (!ctx->first) ctx->first = ifs;
+		if (ctx->last) ctx->last->ifa.ifa_next = &ifs->ifa;
+		ctx->last = ifs;
+	} else {
+		free(ifs);
+	}
+	return 0;
+}
+
+int getifaddrs(struct ifaddrs **ifap)
+{
+	struct ifaddrs_ctx _ctx, *ctx = &_ctx;
+	int r;
+	memset(ctx, 0, sizeof *ctx);
+	r = __rtnetlink_enumerate(AF_UNSPEC, AF_UNSPEC, netlink_msg_to_ifaddr, ctx);
+	if (r == 0) *ifap = &ctx->first->ifa;
+	else freeifaddrs(&ctx->first->ifa);
+	return r;
+}
diff --git a/fusl/src/network/getnameinfo.c b/fusl/src/network/getnameinfo.c
new file mode 100644
index 0000000..5e6fae3
--- /dev/null
+++ b/fusl/src/network/getnameinfo.c
@@ -0,0 +1,202 @@
+#include <netdb.h>
+#include <limits.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <ctype.h>
+#include "lookup.h"
+#include "stdio_impl.h"
+
+int __dns_parse(const unsigned char *, int, int (*)(void *, int, const void *, int, const void *), void *);
+int __dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int);
+int __res_mkquery(int, const char *, int, int, const unsigned char *, int, const unsigned char*, unsigned char *, int);
+int __res_send(const unsigned char *, int, unsigned char *, int);
+
+#define PTR_MAX (64 + sizeof ".in-addr.arpa")
+#define RR_PTR 12
+
+static char *itoa(char *p, unsigned x) {
+	p += 3*sizeof(int);
+	*--p = 0;
+	do {
+		*--p = '0' + x % 10;
+		x /= 10;
+	} while (x);
+	return p;
+}
+
+static void mkptr4(char *s, const unsigned char *ip)
+{
+	sprintf(s, "%d.%d.%d.%d.in-addr.arpa",
+		ip[3], ip[2], ip[1], ip[0]);
+}
+
+static void mkptr6(char *s, const unsigned char *ip)
+{
+	static const char xdigits[] = "0123456789abcdef";
+	int i;
+	for (i=15; i>=0; i--) {
+		*s++ = xdigits[ip[i]&15]; *s++ = '.';
+		*s++ = xdigits[ip[i]>>4]; *s++ = '.';
+	}
+	strcpy(s, "ip6.arpa");
+}
+
+static void reverse_hosts(char *buf, const unsigned char *a, unsigned scopeid, int family)
+{
+	char line[512], *p, *z;
+	unsigned char _buf[1032], atmp[16];
+	struct address iplit;
+	FILE _f, *f = __fopen_rb_ca("/etc/hosts", &_f, _buf, sizeof _buf);
+	if (!f) return;
+	if (family == AF_INET) {
+		memcpy(atmp+12, a, 4);
+		memcpy(atmp, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
+		a = atmp;
+	}
+	while (fgets(line, sizeof line, f)) {
+		if ((p=strchr(line, '#'))) *p++='\n', *p=0;
+
+		for (p=line; *p && !isspace(*p); p++);
+		*p++ = 0;
+		if (__lookup_ipliteral(&iplit, line, AF_UNSPEC)<=0)
+			continue;
+
+		if (iplit.family == AF_INET) {
+			memcpy(iplit.addr+12, iplit.addr, 4);
+			memcpy(iplit.addr, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
+			iplit.scopeid = 0;
+		}
+
+		if (memcmp(a, iplit.addr, 16) || iplit.scopeid != scopeid)
+			continue;
+			
+		for (; *p && isspace(*p); p++);
+		for (z=p; *z && !isspace(*z); z++);
+		*z = 0;
+		if (z-p < 256) {
+			memcpy(buf, p, z-p+1);
+			break;
+		}
+	}
+	__fclose_ca(f);
+}
+
+static void reverse_services(char *buf, int port, int dgram)
+{
+	unsigned long svport;
+	char line[128], *p, *z;
+	unsigned char _buf[1032];
+	FILE _f, *f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf);
+	if (!f) return;
+	while (fgets(line, sizeof line, f)) {
+		if ((p=strchr(line, '#'))) *p++='\n', *p=0;
+
+		for (p=line; *p && !isspace(*p); p++);
+		if (!*p) continue;
+		*p++ = 0;
+		svport = strtoul(p, &z, 10);
+
+		if (svport != port || z==p) continue;
+		if (dgram && strncmp(z, "/udp", 4)) continue;
+		if (!dgram && strncmp(z, "/tcp", 4)) continue;
+		if (p-line > 32) continue;
+
+		memcpy(buf, line, p-line);
+		break;
+	}
+	__fclose_ca(f);
+}
+
+static int dns_parse_callback(void *c, int rr, const void *data, int len, const void *packet)
+{
+	if (rr != RR_PTR) return 0;
+	if (__dn_expand(packet, (const unsigned char *)packet + 512,
+	    data, c, 256) <= 0)
+		*(char *)c = 0;
+	return 0;
+	
+}
+
+int getnameinfo(const struct sockaddr *restrict sa, socklen_t sl,
+	char *restrict node, socklen_t nodelen,
+	char *restrict serv, socklen_t servlen,
+	int flags)
+{
+	char ptr[PTR_MAX];
+	char buf[256], num[3*sizeof(int)+1];
+	int af = sa->sa_family;
+	unsigned char *a;
+	unsigned scopeid;
+
+	switch (af) {
+	case AF_INET:
+		a = (void *)&((struct sockaddr_in *)sa)->sin_addr;
+		if (sl < sizeof(struct sockaddr_in)) return EAI_FAMILY;
+		mkptr4(ptr, a);
+		scopeid = 0;
+		break;
+	case AF_INET6:
+		a = (void *)&((struct sockaddr_in6 *)sa)->sin6_addr;
+		if (sl < sizeof(struct sockaddr_in6)) return EAI_FAMILY;
+		if (memcmp(a, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12))
+			mkptr6(ptr, a);
+		else
+			mkptr4(ptr, a+12);
+		scopeid = ((struct sockaddr_in6 *)sa)->sin6_scope_id;
+		break;
+	default:
+		return EAI_FAMILY;
+	}
+
+	if (node && nodelen) {
+		buf[0] = 0;
+		if (!(flags & NI_NUMERICHOST)) {
+			reverse_hosts(buf, a, scopeid, af);
+		}
+		if (!*buf && !(flags & NI_NUMERICHOST)) {
+			unsigned char query[18+PTR_MAX], reply[512];
+			int qlen = __res_mkquery(0, ptr, 1, RR_PTR,
+				0, 0, 0, query, sizeof query);
+			int rlen = __res_send(query, qlen, reply, sizeof reply);
+			buf[0] = 0;
+			if (rlen > 0)
+				__dns_parse(reply, rlen, dns_parse_callback, buf);
+		}
+		if (!*buf) {
+			if (flags & NI_NAMEREQD) return EAI_NONAME;
+			inet_ntop(af, a, buf, sizeof buf);
+			if (scopeid) {
+				char *p = 0, tmp[IF_NAMESIZE+1];
+				if (!(flags & NI_NUMERICSCOPE) &&
+				    (IN6_IS_ADDR_LINKLOCAL(a) ||
+				     IN6_IS_ADDR_MC_LINKLOCAL(a)))
+					p = if_indextoname(scopeid, tmp+1);
+				if (!p)
+					p = itoa(num, scopeid);
+				*--p = '%';
+				strcat(buf, p);
+			}
+		}
+		if (strlen(buf) >= nodelen) return EAI_OVERFLOW;
+		strcpy(node, buf);
+	}
+
+	if (serv && servlen) {
+		char *p = buf;
+		int port = ntohs(((struct sockaddr_in *)sa)->sin_port);
+		buf[0] = 0;
+		if (!(flags & NI_NUMERICSERV))
+			reverse_services(buf, port, flags & NI_DGRAM);
+		if (!*p)
+			p = itoa(num, port);
+		if (strlen(p) >= servlen)
+			return EAI_OVERFLOW;
+		strcpy(serv, p);
+	}
+
+	return 0;
+}
diff --git a/fusl/src/network/getpeername.c b/fusl/src/network/getpeername.c
new file mode 100644
index 0000000..6567b45
--- /dev/null
+++ b/fusl/src/network/getpeername.c
@@ -0,0 +1,7 @@
+#include <sys/socket.h>
+#include "syscall.h"
+
+int getpeername(int fd, struct sockaddr *restrict addr, socklen_t *restrict len)
+{
+	return socketcall(getpeername, fd, addr, len, 0, 0, 0);
+}
diff --git a/fusl/src/network/getservbyname.c b/fusl/src/network/getservbyname.c
new file mode 100644
index 0000000..dd30376
--- /dev/null
+++ b/fusl/src/network/getservbyname.c
@@ -0,0 +1,12 @@
+#define _GNU_SOURCE
+#include <netdb.h>
+
+struct servent *getservbyname(const char *name, const char *prots)
+{
+	static struct servent se;
+	static char *buf[2];
+	struct servent *res;
+	if (getservbyname_r(name, prots, &se, (void *)buf, sizeof buf, &res))
+		return 0;
+	return &se;
+}
diff --git a/fusl/src/network/getservbyname_r.c b/fusl/src/network/getservbyname_r.c
new file mode 100644
index 0000000..056c2f3
--- /dev/null
+++ b/fusl/src/network/getservbyname_r.c
@@ -0,0 +1,47 @@
+#define _GNU_SOURCE
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <string.h>
+#include "lookup.h"
+
+#define ALIGN (sizeof(struct { char a; char *b; }) - sizeof(char *))
+
+int getservbyname_r(const char *name, const char *prots,
+	struct servent *se, char *buf, size_t buflen, struct servent **res)
+{
+	struct service servs[MAXSERVS];
+	int cnt, proto, align;
+
+	/* Align buffer */
+	align = -(uintptr_t)buf & ALIGN-1;
+	if (buflen < 2*sizeof(char *)+align)
+		return ERANGE;
+	buf += align;
+
+	if (!prots) proto = 0;
+	else if (!strcmp(prots, "tcp")) proto = IPPROTO_TCP;
+	else if (!strcmp(prots, "udp")) proto = IPPROTO_UDP;
+	else return EINVAL;
+
+	cnt = __lookup_serv(servs, name, proto, 0, 0);
+	if (cnt<0) switch (cnt) {
+	case EAI_MEMORY:
+	case EAI_SYSTEM:
+		return ENOMEM;
+	default:
+		return ENOENT;
+	}
+
+	se->s_name = (char *)name;
+	se->s_aliases = (void *)buf;
+	se->s_aliases[0] = se->s_name;
+	se->s_aliases[1] = 0;
+	se->s_port = htons(servs[0].port);
+	se->s_proto = servs[0].proto == IPPROTO_TCP ? "tcp" : "udp";
+
+	*res = se;
+	return 0;
+}
diff --git a/fusl/src/network/getservbyport.c b/fusl/src/network/getservbyport.c
new file mode 100644
index 0000000..c9ecbb1
--- /dev/null
+++ b/fusl/src/network/getservbyport.c
@@ -0,0 +1,12 @@
+#define _GNU_SOURCE
+#include <netdb.h>
+
+struct servent *getservbyport(int port, const char *prots)
+{
+	static struct servent se;
+	static long buf[32/sizeof(long)];
+	struct servent *res;
+	if (getservbyport_r(port, prots, &se, (void *)buf, sizeof buf, &res))
+		return 0;
+	return &se;
+}
diff --git a/fusl/src/network/getservbyport_r.c b/fusl/src/network/getservbyport_r.c
new file mode 100644
index 0000000..a0a7cae
--- /dev/null
+++ b/fusl/src/network/getservbyport_r.c
@@ -0,0 +1,55 @@
+#define _GNU_SOURCE
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <string.h>
+
+int getservbyport_r(int port, const char *prots,
+	struct servent *se, char *buf, size_t buflen, struct servent **res)
+{
+	int i;
+	struct sockaddr_in sin = {
+		.sin_family = AF_INET,
+		.sin_port = port,
+	};
+
+	if (!prots) {
+		int r = getservbyport_r(port, "tcp", se, buf, buflen, res);
+		if (r) r = getservbyport_r(port, "udp", se, buf, buflen, res);
+		return r;
+	}
+
+	/* Align buffer */
+	i = (uintptr_t)buf & sizeof(char *)-1;
+	if (!i) i = sizeof(char *);
+	if (buflen < 3*sizeof(char *)-i)
+		return ERANGE;
+	buf += sizeof(char *)-i;
+	buflen -= sizeof(char *)-i;
+
+	if (strcmp(prots, "tcp") && strcmp(prots, "udp")) return EINVAL;
+
+	se->s_port = port;
+	se->s_proto = (char *)prots;
+	se->s_aliases = (void *)buf;
+	buf += 2*sizeof(char *);
+	buflen -= 2*sizeof(char *);
+	se->s_aliases[1] = 0;
+	se->s_aliases[0] = se->s_name = buf;
+
+	switch (getnameinfo((void *)&sin, sizeof sin, 0, 0, buf, buflen,
+		strcmp(prots, "udp") ? 0 : NI_DGRAM)) {
+	case EAI_MEMORY:
+	case EAI_SYSTEM:
+		return ENOMEM;
+	default:
+		return ENOENT;
+	case 0:
+		break;
+	}
+
+	*res = se;
+	return 0;
+}
diff --git a/fusl/src/network/getsockname.c b/fusl/src/network/getsockname.c
new file mode 100644
index 0000000..7885fc1
--- /dev/null
+++ b/fusl/src/network/getsockname.c
@@ -0,0 +1,7 @@
+#include <sys/socket.h>
+#include "syscall.h"
+
+int getsockname(int fd, struct sockaddr *restrict addr, socklen_t *restrict len)
+{
+	return socketcall(getsockname, fd, addr, len, 0, 0, 0);
+}
diff --git a/fusl/src/network/getsockopt.c b/fusl/src/network/getsockopt.c
new file mode 100644
index 0000000..28079d8
--- /dev/null
+++ b/fusl/src/network/getsockopt.c
@@ -0,0 +1,7 @@
+#include <sys/socket.h>
+#include "syscall.h"
+
+int getsockopt(int fd, int level, int optname, void *restrict optval, socklen_t *restrict optlen)
+{
+	return socketcall(getsockopt, fd, level, optname, optval, optlen, 0);
+}
diff --git a/fusl/src/network/h_errno.c b/fusl/src/network/h_errno.c
new file mode 100644
index 0000000..4f700ce
--- /dev/null
+++ b/fusl/src/network/h_errno.c
@@ -0,0 +1,9 @@
+#include <netdb.h>
+
+#undef h_errno
+int h_errno;
+
+int *__h_errno_location(void)
+{
+	return &h_errno;
+}
diff --git a/fusl/src/network/herror.c b/fusl/src/network/herror.c
new file mode 100644
index 0000000..65f25ff
--- /dev/null
+++ b/fusl/src/network/herror.c
@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <netdb.h>
+
+void herror(const char *msg)
+{
+	fprintf(stderr, "%s%s%s", msg?msg:"", msg?": ":"", hstrerror(h_errno));
+}
diff --git a/fusl/src/network/hstrerror.c b/fusl/src/network/hstrerror.c
new file mode 100644
index 0000000..a4d001c
--- /dev/null
+++ b/fusl/src/network/hstrerror.c
@@ -0,0 +1,18 @@
+#define _GNU_SOURCE
+#include <netdb.h>
+#include "locale_impl.h"
+
+static const char msgs[] =
+	"Host not found\0"
+	"Try again\0"
+	"Non-recoverable error\0"
+	"Address not available\0"
+	"\0Unknown error";
+
+const char *hstrerror(int ecode)
+{
+	const char *s;
+	for (s=msgs, ecode--; ecode && *s; ecode--, s++) for (; *s; s++);
+	if (!*s) s++;
+	return LCTRANS_CUR(s);
+}
diff --git a/fusl/src/network/htonl.c b/fusl/src/network/htonl.c
new file mode 100644
index 0000000..6622d16
--- /dev/null
+++ b/fusl/src/network/htonl.c
@@ -0,0 +1,8 @@
+#include <netinet/in.h>
+#include <byteswap.h>
+
+uint32_t htonl(uint32_t n)
+{
+	union { int i; char c; } u = { 1 };
+	return u.c ? bswap_32(n) : n;
+}
diff --git a/fusl/src/network/htons.c b/fusl/src/network/htons.c
new file mode 100644
index 0000000..03a3a1d
--- /dev/null
+++ b/fusl/src/network/htons.c
@@ -0,0 +1,8 @@
+#include <netinet/in.h>
+#include <byteswap.h>
+
+uint16_t htons(uint16_t n)
+{
+	union { int i; char c; } u = { 1 };
+	return u.c ? bswap_16(n) : n;
+}
diff --git a/fusl/src/network/if_freenameindex.c b/fusl/src/network/if_freenameindex.c
new file mode 100644
index 0000000..89bafcc
--- /dev/null
+++ b/fusl/src/network/if_freenameindex.c
@@ -0,0 +1,7 @@
+#include <net/if.h>
+#include <stdlib.h>
+
+void if_freenameindex(struct if_nameindex *idx)
+{
+	free(idx);
+}
diff --git a/fusl/src/network/if_indextoname.c b/fusl/src/network/if_indextoname.c
new file mode 100644
index 0000000..6ee7f13
--- /dev/null
+++ b/fusl/src/network/if_indextoname.c
@@ -0,0 +1,18 @@
+#define _GNU_SOURCE
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <string.h>
+#include "syscall.h"
+
+char *if_indextoname(unsigned index, char *name)
+{
+	struct ifreq ifr;
+	int fd, r;
+
+	if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) return 0;
+	ifr.ifr_ifindex = index;
+	r = ioctl(fd, SIOCGIFNAME, &ifr);
+	__syscall(SYS_close, fd);
+	return r < 0 ? 0 : strncpy(name, ifr.ifr_name, IF_NAMESIZE);
+}
diff --git a/fusl/src/network/if_nameindex.c b/fusl/src/network/if_nameindex.c
new file mode 100644
index 0000000..2deaef7
--- /dev/null
+++ b/fusl/src/network/if_nameindex.c
@@ -0,0 +1,114 @@
+#define _GNU_SOURCE
+#include <net/if.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include "netlink.h"
+
+#define IFADDRS_HASH_SIZE 64
+
+struct ifnamemap {
+	unsigned int hash_next;
+	unsigned int index;
+	unsigned char namelen;
+	char name[IFNAMSIZ];
+};
+
+struct ifnameindexctx {
+	unsigned int num, allocated, str_bytes;
+	struct ifnamemap *list;
+	unsigned int hash[IFADDRS_HASH_SIZE];
+};
+
+static int netlink_msg_to_nameindex(void *pctx, struct nlmsghdr *h)
+{
+	struct ifnameindexctx *ctx = pctx;
+	struct ifnamemap *map;
+	struct rtattr *rta;
+	unsigned int i;
+	int index, type, namelen, bucket;
+
+	if (h->nlmsg_type == RTM_NEWLINK) {
+		struct ifinfomsg *ifi = NLMSG_DATA(h);
+		index = ifi->ifi_index;
+		type = IFLA_IFNAME;
+		rta = NLMSG_RTA(h, sizeof(*ifi));
+	} else {
+		struct ifaddrmsg *ifa = NLMSG_DATA(h);
+		index = ifa->ifa_index;
+		type = IFA_LABEL;
+		rta = NLMSG_RTA(h, sizeof(*ifa));
+	}
+	for (; NLMSG_RTAOK(rta, h); rta = RTA_NEXT(rta)) {
+		if (rta->rta_type != type) continue;
+
+		namelen = RTA_DATALEN(rta) - 1;
+		if (namelen > IFNAMSIZ) return 0;
+
+		/* suppress duplicates */
+		bucket = index % IFADDRS_HASH_SIZE;
+		i = ctx->hash[bucket];
+		while (i) {
+			map = &ctx->list[i-1];
+			if (map->index == index &&
+			    map->namelen == namelen &&
+			    memcmp(map->name, RTA_DATA(rta), namelen) == 0)
+				return 0;
+			i = map->hash_next;
+		}
+
+		if (ctx->num >= ctx->allocated) {
+			size_t a = ctx->allocated ? ctx->allocated * 2 + 1 : 8;
+			if (a > SIZE_MAX/sizeof *map) return -1;
+			map = realloc(ctx->list, a * sizeof *map);
+			if (!map) return -1;
+			ctx->list = map;
+			ctx->allocated = a;
+		}
+		map = &ctx->list[ctx->num];
+		map->index = index;
+		map->namelen = namelen;
+		memcpy(map->name, RTA_DATA(rta), namelen);
+		ctx->str_bytes += namelen + 1;
+		ctx->num++;
+		map->hash_next = ctx->hash[bucket];
+		ctx->hash[bucket] = ctx->num;
+		return 0;
+	}
+	return 0;
+}
+
+struct if_nameindex *if_nameindex()
+{
+	struct ifnameindexctx _ctx, *ctx = &_ctx;
+	struct if_nameindex *ifs = 0, *d;
+	struct ifnamemap *s;
+	char *p;
+	int i;
+	int cs;
+
+	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
+	memset(ctx, 0, sizeof(*ctx));
+	if (__rtnetlink_enumerate(AF_UNSPEC, AF_INET, netlink_msg_to_nameindex, ctx) < 0) goto err;
+
+	ifs = malloc(sizeof(struct if_nameindex[ctx->num+1]) + ctx->str_bytes);
+	if (!ifs) goto err;
+
+	p = (char*)(ifs + ctx->num + 1);
+	for (i = ctx->num, d = ifs, s = ctx->list; i; i--, s++, d++) {
+		d->if_index = s->index;
+		d->if_name = p;
+		memcpy(p, s->name, s->namelen);
+		p += s->namelen;
+		*p++ = 0;
+	}
+	d->if_index = 0;
+	d->if_name = 0;
+err:
+	pthread_setcancelstate(cs, 0);
+	free(ctx->list);
+	errno = ENOBUFS;
+	return ifs;
+}
diff --git a/fusl/src/network/if_nametoindex.c b/fusl/src/network/if_nametoindex.c
new file mode 100644
index 0000000..cb6ec05
--- /dev/null
+++ b/fusl/src/network/if_nametoindex.c
@@ -0,0 +1,18 @@
+#define _GNU_SOURCE
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <string.h>
+#include "syscall.h"
+
+unsigned if_nametoindex(const char *name)
+{
+	struct ifreq ifr;
+	int fd, r;
+
+	if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) return -1;
+	strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
+	r = ioctl(fd, SIOCGIFINDEX, &ifr);
+	__syscall(SYS_close, fd);
+	return r < 0 ? 0 : ifr.ifr_ifindex;
+}
diff --git a/fusl/src/network/in6addr_any.c b/fusl/src/network/in6addr_any.c
new file mode 100644
index 0000000..995387f
--- /dev/null
+++ b/fusl/src/network/in6addr_any.c
@@ -0,0 +1,3 @@
+#include <netinet/in.h>
+
+const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
diff --git a/fusl/src/network/in6addr_loopback.c b/fusl/src/network/in6addr_loopback.c
new file mode 100644
index 0000000..b96005b
--- /dev/null
+++ b/fusl/src/network/in6addr_loopback.c
@@ -0,0 +1,3 @@
+#include <netinet/in.h>
+
+const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
diff --git a/fusl/src/network/inet_addr.c b/fusl/src/network/inet_addr.c
new file mode 100644
index 0000000..10b21f2
--- /dev/null
+++ b/fusl/src/network/inet_addr.c
@@ -0,0 +1,12 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+int __inet_aton(const char *, struct in_addr *);
+
+in_addr_t inet_addr(const char *p)
+{
+	struct in_addr a;
+	if (!__inet_aton(p, &a)) return -1;
+	return a.s_addr;
+}
diff --git a/fusl/src/network/inet_aton.c b/fusl/src/network/inet_aton.c
new file mode 100644
index 0000000..0f9a45f
--- /dev/null
+++ b/fusl/src/network/inet_aton.c
@@ -0,0 +1,41 @@
+#include <ctype.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include "libc.h"
+
+int __inet_aton(const char *s0, struct in_addr *dest)
+{
+	const char *s = s0;
+	unsigned char *d = (void *)dest;
+	unsigned long a[4] = { 0 };
+	char *z;
+	int i;
+
+	for (i=0; i<4; i++) {
+		a[i] = strtoul(s, &z, 0);
+		if (z==s || (*z && *z != '.') || !isdigit(*s))
+			return 0;
+		if (!*z) break;
+		s=z+1;
+	}
+	if (i==4) return 0;
+	switch (i) {
+	case 0:
+		a[1] = a[0] & 0xffffff;
+		a[0] >>= 24;
+	case 1:
+		a[2] = a[1] & 0xffff;
+		a[1] >>= 16;
+	case 2:
+		a[3] = a[2] & 0xff;
+		a[2] >>= 8;
+	}
+	for (i=0; i<4; i++) {
+		if (a[i] > 255) return 0;
+		d[i] = a[i];
+	}
+	return 1;
+}
+
+weak_alias(__inet_aton, inet_aton);
diff --git a/fusl/src/network/inet_legacy.c b/fusl/src/network/inet_legacy.c
new file mode 100644
index 0000000..621b47b
--- /dev/null
+++ b/fusl/src/network/inet_legacy.c
@@ -0,0 +1,32 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+in_addr_t inet_network(const char *p)
+{
+	return ntohl(inet_addr(p));
+}
+
+struct in_addr inet_makeaddr(in_addr_t n, in_addr_t h)
+{
+	if (n < 256) h |= n<<24;
+	else if (n < 65536) h |= n<<16;
+	else h |= n<<8;
+	return (struct in_addr){ h };
+}
+
+in_addr_t inet_lnaof(struct in_addr in)
+{
+	uint32_t h = in.s_addr;
+	if (h>>24 < 128) return h & 0xffffff;
+	if (h>>24 < 192) return h & 0xffff;
+	return h & 0xff;
+}
+
+in_addr_t inet_netof(struct in_addr in)
+{
+	uint32_t h = in.s_addr;
+	if (h>>24 < 128) return h >> 24;
+	if (h>>24 < 192) return h >> 16;
+	return h >> 8;
+}
diff --git a/fusl/src/network/inet_ntoa.c b/fusl/src/network/inet_ntoa.c
new file mode 100644
index 0000000..71411e0
--- /dev/null
+++ b/fusl/src/network/inet_ntoa.c
@@ -0,0 +1,10 @@
+#include <arpa/inet.h>
+#include <stdio.h>
+
+char *inet_ntoa(struct in_addr in)
+{
+	static char buf[16];
+	unsigned char *a = (void *)&in;
+	snprintf(buf, sizeof buf, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]);
+	return buf;
+}
diff --git a/fusl/src/network/inet_ntop.c b/fusl/src/network/inet_ntop.c
new file mode 100644
index 0000000..14f9f4c
--- /dev/null
+++ b/fusl/src/network/inet_ntop.c
@@ -0,0 +1,54 @@
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+const char *inet_ntop(int af, const void *restrict a0, char *restrict s, socklen_t l)
+{
+	const unsigned char *a = a0;
+	int i, j, max, best;
+	char buf[100];
+
+	switch (af) {
+	case AF_INET:
+		if (snprintf(s, l, "%d.%d.%d.%d", a[0],a[1],a[2],a[3]) < l)
+			return s;
+		break;
+	case AF_INET6:
+		if (memcmp(a, "\0\0\0\0\0\0\0\0\0\0\377\377", 12))
+			snprintf(buf, sizeof buf,
+				"%x:%x:%x:%x:%x:%x:%x:%x",
+				256*a[0]+a[1],256*a[2]+a[3],
+				256*a[4]+a[5],256*a[6]+a[7],
+				256*a[8]+a[9],256*a[10]+a[11],
+				256*a[12]+a[13],256*a[14]+a[15]);
+		else
+			snprintf(buf, sizeof buf,
+				"%x:%x:%x:%x:%x:%x:%d.%d.%d.%d",
+				256*a[0]+a[1],256*a[2]+a[3],
+				256*a[4]+a[5],256*a[6]+a[7],
+				256*a[8]+a[9],256*a[10]+a[11],
+				a[12],a[13],a[14],a[15]);
+		/* Replace longest /(^0|:)[:0]{2,}/ with "::" */
+		for (i=best=0, max=2; buf[i]; i++) {
+			if (i && buf[i] != ':') continue;
+			j = strspn(buf+i, ":0");
+			if (j>max) best=i, max=j;
+		}
+		if (max>2) {
+			buf[best] = buf[best+1] = ':';
+			memmove(buf+best+2, buf+best+max, i-best-max+1);
+		}
+		if (strlen(buf) < l) {
+			strcpy(s, buf);
+			return s;
+		}
+		break;
+	default:
+		errno = EAFNOSUPPORT;
+		return 0;
+	}
+	errno = ENOSPC;
+	return 0;
+}
diff --git a/fusl/src/network/inet_pton.c b/fusl/src/network/inet_pton.c
new file mode 100644
index 0000000..d36c368
--- /dev/null
+++ b/fusl/src/network/inet_pton.c
@@ -0,0 +1,71 @@
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+
+static int hexval(unsigned c)
+{
+	if (c-'0'<10) return c-'0';
+	c |= 32;
+	if (c-'a'<6) return c-'a'+10;
+	return -1;
+}
+
+int inet_pton(int af, const char *restrict s, void *restrict a0)
+{
+	uint16_t ip[8];
+	unsigned char *a = a0;
+	int i, j, v, d, brk=-1, need_v4=0;
+
+	if (af==AF_INET) {
+		for (i=0; i<4; i++) {
+			for (v=j=0; j<3 && isdigit(s[j]); j++)
+				v = 10*v + s[j]-'0';
+			if (j==0 || (j>1 && s[0]=='0') || v>255) return 0;
+			a[i] = v;
+			if (s[j]==0 && i==3) return 1;
+			if (s[j]!='.') return 0;
+			s += j+1;
+		}
+		return 0;
+	} else if (af!=AF_INET6) {
+		errno = EAFNOSUPPORT;
+		return -1;
+	}
+
+	if (*s==':' && *++s!=':') return 0;
+
+	for (i=0; ; i++) {
+		if (s[0]==':' && brk<0) {
+			brk=i;
+			ip[i&7]=0;
+			if (!*++s) break;
+			if (i==7) return 0;
+			continue;
+		}
+		for (v=j=0; j<4 && (d=hexval(s[j]))>=0; j++)
+			v=16*v+d;
+		if (j==0) return 0;
+		ip[i&7] = v;
+		if (!s[j] && (brk>=0 || i==7)) break;
+		if (i==7) return 0;
+		if (s[j]!=':') {
+			if (s[j]!='.' || (i<6 && brk<0)) return 0;
+			need_v4=1;
+			i++;
+			break;
+		}
+		s += j+1;
+	}
+	if (brk>=0) {
+		memmove(ip+brk+7-i, ip+brk, 2*(i+1-brk));
+		for (j=0; j<7-i; j++) ip[brk+j] = 0;
+	}
+	for (j=0; j<8; j++) {
+		*a++ = ip[j]>>8;
+		*a++ = ip[j];
+	}
+	if (need_v4 && inet_pton(AF_INET, (void *)s, a-4) <= 0) return 0;
+	return 1;
+}
diff --git a/fusl/src/network/listen.c b/fusl/src/network/listen.c
new file mode 100644
index 0000000..f84ad03
--- /dev/null
+++ b/fusl/src/network/listen.c
@@ -0,0 +1,7 @@
+#include <sys/socket.h>
+#include "syscall.h"
+
+int listen(int fd, int backlog)
+{
+	return socketcall(listen, fd, backlog, 0, 0, 0, 0);
+}
diff --git a/fusl/src/network/lookup.h b/fusl/src/network/lookup.h
new file mode 100644
index 0000000..6941911
--- /dev/null
+++ b/fusl/src/network/lookup.h
@@ -0,0 +1,28 @@
+#ifndef LOOKUP_H
+#define LOOKUP_H
+
+#include <stdint.h>
+
+struct address {
+	int family;
+	unsigned scopeid;
+	uint8_t addr[16];
+	int sortkey;
+};
+
+struct service {
+	uint16_t port;
+	unsigned char proto, socktype;
+};
+
+/* The limit of 48 results is a non-sharp bound on the number of addresses
+ * that can fit in one 512-byte DNS packet full of v4 results and a second
+ * packet full of v6 results. Due to headers, the actual limit is lower. */
+#define MAXADDRS 48
+#define MAXSERVS 2
+
+int __lookup_serv(struct service buf[static MAXSERVS], const char *name, int proto, int socktype, int flags);
+int __lookup_name(struct address buf[static MAXADDRS], char canon[static 256], const char *name, int family, int flags);
+int __lookup_ipliteral(struct address buf[static 1], const char *name, int family);
+
+#endif
diff --git a/fusl/src/network/lookup_ipliteral.c b/fusl/src/network/lookup_ipliteral.c
new file mode 100644
index 0000000..8ed1460
--- /dev/null
+++ b/fusl/src/network/lookup_ipliteral.c
@@ -0,0 +1,57 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include "lookup.h"
+
+int __inet_aton(const char *, struct in_addr *);
+
+int __lookup_ipliteral(struct address buf[static 1], const char *name, int family)
+{
+	struct in_addr a4;
+	struct in6_addr a6;
+	if (__inet_aton(name, &a4) > 0) {
+		if (family == AF_INET6) /* wrong family */
+			return EAI_NONAME;
+		memcpy(&buf[0].addr, &a4, sizeof a4);
+		buf[0].family = AF_INET;
+		buf[0].scopeid = 0;
+		return 1;
+	}
+
+	char tmp[64];
+	char *p = strchr(name, '%'), *z;
+	unsigned long long scopeid = 0;
+	if (p && p-name < 64) {
+		memcpy(tmp, name, p-name);
+		tmp[p-name] = 0;
+		name = tmp;
+	}
+
+	if (inet_pton(AF_INET6, name, &a6) <= 0)
+		return 0;
+	if (family == AF_INET) /* wrong family */
+		return EAI_NONAME;
+
+	memcpy(&buf[0].addr, &a6, sizeof a6);
+	buf[0].family = AF_INET6;
+	if (p) {
+		if (isdigit(*++p)) scopeid = strtoull(p, &z, 10);
+		else z = p-1;
+		if (*z) {
+			if (!IN6_IS_ADDR_LINKLOCAL(&a6) &&
+			    !IN6_IS_ADDR_MC_LINKLOCAL(&a6))
+				return EAI_NONAME;
+			scopeid = if_nametoindex(p);
+			if (!scopeid) return EAI_NONAME;
+		}
+		if (scopeid > UINT_MAX) return EAI_NONAME;
+	}
+	buf[0].scopeid = scopeid;
+	return 1;
+}
diff --git a/fusl/src/network/lookup_name.c b/fusl/src/network/lookup_name.c
new file mode 100644
index 0000000..df9e623
--- /dev/null
+++ b/fusl/src/network/lookup_name.c
@@ -0,0 +1,345 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <errno.h>
+#include "lookup.h"
+#include "stdio_impl.h"
+#include "syscall.h"
+
+static int is_valid_hostname(const char *host)
+{
+	const unsigned char *s;
+	if (strnlen(host, 255)-1 >= 254 || mbstowcs(0, host, 0) == -1) return 0;
+	for (s=(void *)host; *s>=0x80 || *s=='.' || *s=='-' || isalnum(*s); s++);
+	return !*s;
+}
+
+static int name_from_null(struct address buf[static 2], const char *name, int family, int flags)
+{
+	int cnt = 0;
+	if (name) return 0;
+	if (flags & AI_PASSIVE) {
+		if (family != AF_INET6)
+			buf[cnt++] = (struct address){ .family = AF_INET };
+		if (family != AF_INET)
+			buf[cnt++] = (struct address){ .family = AF_INET6 };
+	} else {
+		if (family != AF_INET6)
+			buf[cnt++] = (struct address){ .family = AF_INET, .addr = { 127,0,0,1 } };
+		if (family != AF_INET)
+			buf[cnt++] = (struct address){ .family = AF_INET6, .addr = { [15] = 1 } };
+	}
+	return cnt;
+}
+
+static int name_from_numeric(struct address buf[static 1], const char *name, int family)
+{
+	return __lookup_ipliteral(buf, name, family);
+}
+
+static int name_from_hosts(struct address buf[static MAXADDRS], char canon[static 256], const char *name, int family)
+{
+	char line[512];
+	size_t l = strlen(name);
+	int cnt = 0;
+	unsigned char _buf[1032];
+	FILE _f, *f = __fopen_rb_ca("/etc/hosts", &_f, _buf, sizeof _buf);
+	if (!f) switch (errno) {
+	case ENOENT:
+	case ENOTDIR:
+	case EACCES:
+		return 0;
+	default:
+		return EAI_SYSTEM;
+	}
+	while (fgets(line, sizeof line, f) && cnt < MAXADDRS) {
+		char *p, *z;
+
+		if ((p=strchr(line, '#'))) *p++='\n', *p=0;
+		for(p=line+1; (p=strstr(p, name)) &&
+			(!isspace(p[-1]) || !isspace(p[l])); p++);
+		if (!p) continue;
+
+		/* Isolate IP address to parse */
+		for (p=line; *p && !isspace(*p); p++);
+		*p++ = 0;
+		if (name_from_numeric(buf+cnt, line, family))
+			cnt++;
+
+		/* Extract first name as canonical name */
+		for (; *p && isspace(*p); p++);
+		for (z=p; *z && !isspace(*z); z++);
+		*z = 0;
+		if (is_valid_hostname(p)) memcpy(canon, p, z-p+1);
+	}
+	__fclose_ca(f);
+	return cnt;
+}
+
+struct dpc_ctx {
+	struct address *addrs;
+	char *canon;
+	int cnt;
+};
+
+int __dns_parse(const unsigned char *, int, int (*)(void *, int, const void *, int, const void *), void *);
+int __dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int);
+int __res_mkquery(int, const char *, int, int, const unsigned char *, int, const unsigned char*, unsigned char *, int);
+int __res_msend(int, const unsigned char *const *, const int *, unsigned char *const *, int *, int);
+
+#define RR_A 1
+#define RR_CNAME 5
+#define RR_AAAA 28
+
+static int dns_parse_callback(void *c, int rr, const void *data, int len, const void *packet)
+{
+	char tmp[256];
+	struct dpc_ctx *ctx = c;
+	switch (rr) {
+	case RR_A:
+		if (len != 4) return -1;
+		ctx->addrs[ctx->cnt].family = AF_INET;
+		ctx->addrs[ctx->cnt].scopeid = 0;
+		memcpy(ctx->addrs[ctx->cnt++].addr, data, 4);
+		break;
+	case RR_AAAA:
+		if (len != 16) return -1;
+		ctx->addrs[ctx->cnt].family = AF_INET6;
+		ctx->addrs[ctx->cnt].scopeid = 0;
+		memcpy(ctx->addrs[ctx->cnt++].addr, data, 16);
+		break;
+	case RR_CNAME:
+		if (__dn_expand(packet, (const unsigned char *)packet + 512,
+		    data, tmp, sizeof tmp) > 0 && is_valid_hostname(tmp))
+			strcpy(ctx->canon, tmp);
+		break;
+	}
+	return 0;
+}
+
+static int name_from_dns(struct address buf[static MAXADDRS], char canon[static 256], const char *name, int family)
+{
+	unsigned char qbuf[2][280], abuf[2][512];
+	const unsigned char *qp[2] = { qbuf[0], qbuf[1] };
+	unsigned char *ap[2] = { abuf[0], abuf[1] };
+	int qlens[2], alens[2];
+	int i, nq = 0;
+	struct dpc_ctx ctx = { .addrs = buf, .canon = canon };
+
+	if (family != AF_INET6) {
+		qlens[nq] = __res_mkquery(0, name, 1, RR_A, 0, 0, 0,
+			qbuf[nq], sizeof *qbuf);
+		nq++;
+	}
+	if (family != AF_INET) {
+		qlens[nq] = __res_mkquery(0, name, 1, RR_AAAA, 0, 0, 0,
+			qbuf[nq], sizeof *qbuf);
+		nq++;
+	}
+
+	if (__res_msend(nq, qp, qlens, ap, alens, sizeof *abuf) < 0) return EAI_SYSTEM;
+
+	for (i=0; i<nq; i++)
+		__dns_parse(abuf[i], alens[i], dns_parse_callback, &ctx);
+
+	if (ctx.cnt) return ctx.cnt;
+	if (alens[0] < 4 || (abuf[0][3] & 15) == 2) return EAI_AGAIN;
+	if ((abuf[0][3] & 15) == 3) return EAI_NONAME;
+	return EAI_FAIL;
+}
+
+static const struct policy {
+	unsigned char addr[16];
+	unsigned char len, mask;
+	unsigned char prec, label;
+} defpolicy[] = {
+	{ "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1", 15, 0xff, 50, 0 },
+	{ "\0\0\0\0\0\0\0\0\0\0\xff\xff", 11, 0xff, 35, 4 },
+	{ "\x20\2", 1, 0xff, 30, 2 },
+	{ "\x20\1", 3, 0xff, 5, 5 },
+	{ "\xfc", 0, 0xfe, 3, 13 },
+#if 0
+	/* These are deprecated and/or returned to the address
+	 * pool, so despite the RFC, treating them as special
+	 * is probably wrong. */
+	{ "", 11, 0xff, 1, 3 },
+	{ "\xfe\xc0", 1, 0xc0, 1, 11 },
+	{ "\x3f\xfe", 1, 0xff, 1, 12 },
+#endif
+	/* Last rule must match all addresses to stop loop. */
+	{ "", 0, 0, 40, 1 },
+};
+
+static const struct policy *policyof(const struct in6_addr *a)
+{
+	int i;
+	for (i=0; ; i++) {
+		if (memcmp(a->s6_addr, defpolicy[i].addr, defpolicy[i].len))
+			continue;
+		if ((a->s6_addr[defpolicy[i].len] & defpolicy[i].mask)
+		    != defpolicy[i].addr[defpolicy[i].len])
+			continue;
+		return defpolicy+i;
+	}
+}
+
+static int labelof(const struct in6_addr *a)
+{
+	return policyof(a)->label;
+}
+
+static int scopeof(const struct in6_addr *a)
+{
+	if (IN6_IS_ADDR_MULTICAST(a)) return a->s6_addr[1] & 15;
+	if (IN6_IS_ADDR_LINKLOCAL(a)) return 2;
+	if (IN6_IS_ADDR_LOOPBACK(a)) return 2;
+	if (IN6_IS_ADDR_SITELOCAL(a)) return 5;
+	return 14;
+}
+
+static int prefixmatch(const struct in6_addr *s, const struct in6_addr *d)
+{
+	/* FIXME: The common prefix length should be limited to no greater
+	 * than the nominal length of the prefix portion of the source
+	 * address. However the definition of the source prefix length is
+	 * not clear and thus this limiting is not yet implemented. */
+	unsigned i;
+	for (i=0; i<128 && !((s->s6_addr[i/8]^d->s6_addr[i/8])&(128>>(i%8))); i++);
+	return i;
+}
+
+#define DAS_USABLE              0x40000000
+#define DAS_MATCHINGSCOPE       0x20000000
+#define DAS_MATCHINGLABEL       0x10000000
+#define DAS_PREC_SHIFT          20
+#define DAS_SCOPE_SHIFT         16
+#define DAS_PREFIX_SHIFT        8
+#define DAS_ORDER_SHIFT         0
+
+static int addrcmp(const void *_a, const void *_b)
+{
+	const struct address *a = _a, *b = _b;
+	return b->sortkey - a->sortkey;
+}
+
+int __lookup_name(struct address buf[static MAXADDRS], char canon[static 256], const char *name, int family, int flags)
+{
+	int cnt = 0, i, j;
+
+	*canon = 0;
+	if (name) {
+		/* reject empty name and check len so it fits into temp bufs */
+		size_t l = strnlen(name, 255);
+		if (l-1 >= 254)
+			return EAI_NONAME;
+		memcpy(canon, name, l+1);
+	}
+
+	/* Procedurally, a request for v6 addresses with the v4-mapped
+	 * flag set is like a request for unspecified family, followed
+	 * by filtering of the results. */
+	if (flags & AI_V4MAPPED) {
+		if (family == AF_INET6) family = AF_UNSPEC;
+		else flags -= AI_V4MAPPED;
+	}
+
+	/* Try each backend until there's at least one result. */
+	cnt = name_from_null(buf, name, family, flags);
+	if (!cnt) cnt = name_from_numeric(buf, name, family);
+	if (!cnt && !(flags & AI_NUMERICHOST)) {
+		cnt = name_from_hosts(buf, canon, name, family);
+		if (!cnt) cnt = name_from_dns(buf, canon, name, family);
+	}
+	if (cnt<=0) return cnt ? cnt : EAI_NONAME;
+
+	/* Filter/transform results for v4-mapped lookup, if requested. */
+	if (flags & AI_V4MAPPED) {
+		if (!(flags & AI_ALL)) {
+			/* If any v6 results exist, remove v4 results. */
+			for (i=0; i<cnt && buf[i].family != AF_INET6; i++);
+			if (i<cnt) {
+				for (j=0; i<cnt; i++) {
+					if (buf[i].family == AF_INET6)
+						buf[j++] = buf[i];
+				}
+				cnt = i = j;
+			}
+		}
+		/* Translate any remaining v4 results to v6 */
+		for (i=0; i<cnt; i++) {
+			if (buf[i].family != AF_INET) continue;
+			memcpy(buf[i].addr+12, buf[i].addr, 4);
+			memcpy(buf[i].addr, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
+			buf[i].family = AF_INET6;
+		}
+	}
+
+	/* No further processing is needed if there are fewer than 2
+	 * results or if there are only IPv4 results. */
+	if (cnt<2 || family==AF_INET) return cnt;
+	for (i=0; buf[i].family == AF_INET; i++)
+		if (i==cnt) return cnt;
+
+	int cs;
+	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
+
+	/* The following implements a subset of RFC 3484/6724 destination
+	 * address selection by generating a single 31-bit sort key for
+	 * each address. Rules 3, 4, and 7 are omitted for having
+	 * excessive runtime and code size cost and dubious benefit.
+	 * So far the label/precedence table cannot be customized. */
+	for (i=0; i<cnt; i++) {
+		int key = 0;
+		struct sockaddr_in6 sa, da = {
+			.sin6_family = AF_INET6,
+			.sin6_scope_id = buf[i].scopeid,
+			.sin6_port = 65535
+		};
+		if (buf[i].family == AF_INET6) {
+			memcpy(da.sin6_addr.s6_addr, buf[i].addr, 16);
+		} else {
+			memcpy(da.sin6_addr.s6_addr,
+				"\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
+			memcpy(da.sin6_addr.s6_addr+12, buf[i].addr, 4);
+		}
+		const struct policy *dpolicy = policyof(&da.sin6_addr);
+		int dscope = scopeof(&da.sin6_addr);
+		int dlabel = dpolicy->label;
+		int dprec = dpolicy->prec;
+		int prefixlen = 0;
+		int fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC, IPPROTO_UDP);
+		if (fd >= 0) {
+			if (!connect(fd, (void *)&da, sizeof da)) {
+				key |= DAS_USABLE;
+				if (!getsockname(fd, (void *)&sa,
+				    &(socklen_t){sizeof sa})) {
+					if (dscope == scopeof(&sa.sin6_addr))
+						key |= DAS_MATCHINGSCOPE;
+					if (dlabel == labelof(&sa.sin6_addr))
+						key |= DAS_MATCHINGLABEL;
+					prefixlen = prefixmatch(&sa.sin6_addr,
+						&da.sin6_addr);
+				}
+			}
+			close(fd);
+		}
+		key |= dprec << DAS_PREC_SHIFT;
+		key |= (15-dscope) << DAS_SCOPE_SHIFT;
+		key |= prefixlen << DAS_PREFIX_SHIFT;
+		key |= (MAXADDRS-i) << DAS_ORDER_SHIFT;
+		buf[i].sortkey = key;
+	}
+	qsort(buf, cnt, sizeof *buf, addrcmp);
+
+	pthread_setcancelstate(cs, 0);
+
+	return cnt;
+}
diff --git a/fusl/src/network/lookup_serv.c b/fusl/src/network/lookup_serv.c
new file mode 100644
index 0000000..66ebaea
--- /dev/null
+++ b/fusl/src/network/lookup_serv.c
@@ -0,0 +1,113 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "lookup.h"
+#include "stdio_impl.h"
+
+int __lookup_serv(struct service buf[static MAXSERVS], const char *name, int proto, int socktype, int flags)
+{
+	char line[128];
+	int cnt = 0;
+	char *p, *z = "";
+	unsigned long port = 0;
+
+	switch (socktype) {
+	case SOCK_STREAM:
+		switch (proto) {
+		case 0:
+			proto = IPPROTO_TCP;
+		case IPPROTO_TCP:
+			break;
+		default:
+			return EAI_SERVICE;
+		}
+		break;
+	case SOCK_DGRAM:
+		switch (proto) {
+		case 0:
+			proto = IPPROTO_UDP;
+		case IPPROTO_UDP:
+			break;
+		default:
+			return EAI_SERVICE;
+		}
+	case 0:
+		break;
+	default:
+		if (name) return EAI_SERVICE;
+		buf[0].port = 0;
+		buf[0].proto = proto;
+		buf[0].socktype = socktype;
+		return 1;
+	}
+
+	if (name) {
+		if (!*name) return EAI_SERVICE;
+		port = strtoul(name, &z, 10);
+	}
+	if (!*z) {
+		if (port > 65535) return EAI_SERVICE;
+		if (proto != IPPROTO_UDP) {
+			buf[cnt].port = port;
+			buf[cnt].socktype = SOCK_STREAM;
+			buf[cnt++].proto = IPPROTO_TCP;
+		}
+		if (proto != IPPROTO_TCP) {
+			buf[cnt].port = port;
+			buf[cnt].socktype = SOCK_DGRAM;
+			buf[cnt++].proto = IPPROTO_UDP;
+		}
+		return cnt;
+	}
+
+	if (flags & AI_NUMERICSERV) return EAI_SERVICE;
+
+	size_t l = strlen(name);
+
+	unsigned char _buf[1032];
+	FILE _f, *f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf);
+	if (!f) switch (errno) {
+	case ENOENT:
+	case ENOTDIR:
+	case EACCES:
+		return EAI_SERVICE;
+	default:
+		return EAI_SYSTEM;
+	}
+
+	while (fgets(line, sizeof line, f) && cnt < MAXSERVS) {
+		if ((p=strchr(line, '#'))) *p++='\n', *p=0;
+
+		/* Find service name */
+		for(p=line; (p=strstr(p, name)); p++) {
+			if (p>line && !isspace(p[-1])) continue;
+			if (p[l] && !isspace(p[l])) continue;
+			break;
+		}
+		if (!p) continue;
+
+		/* Skip past canonical name at beginning of line */
+		for (p=line; *p && !isspace(*p); p++);
+
+		port = strtoul(p, &z, 10);
+		if (port > 65535 || z==p) continue;
+		if (!strncmp(z, "/udp", 4)) {
+			if (proto == IPPROTO_TCP) continue;
+			buf[cnt].port = port;
+			buf[cnt].socktype = SOCK_DGRAM;
+			buf[cnt++].proto = IPPROTO_UDP;
+		}
+		if (!strncmp(z, "/tcp", 4)) {
+			if (proto == IPPROTO_UDP) continue;
+			buf[cnt].port = port;
+			buf[cnt].socktype = SOCK_STREAM;
+			buf[cnt++].proto = IPPROTO_TCP;
+		}
+	}
+	__fclose_ca(f);
+	return cnt > 0 ? cnt : EAI_SERVICE;
+}
diff --git a/fusl/src/network/netlink.c b/fusl/src/network/netlink.c
new file mode 100644
index 0000000..94dba7f
--- /dev/null
+++ b/fusl/src/network/netlink.c
@@ -0,0 +1,52 @@
+#include <errno.h>
+#include <string.h>
+#include <syscall.h>
+#include <sys/socket.h>
+#include "netlink.h"
+
+static int __netlink_enumerate(int fd, unsigned int seq, int type, int af,
+	int (*cb)(void *ctx, struct nlmsghdr *h), void *ctx)
+{
+	struct nlmsghdr *h;
+	union {
+		uint8_t buf[8192];
+		struct {
+			struct nlmsghdr nlh;
+			struct rtgenmsg g;
+		} req;
+		struct nlmsghdr reply;
+	} u;
+	int r, ret;
+
+	memset(&u.req, 0, sizeof(u.req));
+	u.req.nlh.nlmsg_len = sizeof(u.req);
+	u.req.nlh.nlmsg_type = type;
+	u.req.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST;
+	u.req.nlh.nlmsg_seq = seq;
+	u.req.g.rtgen_family = af;
+	r = send(fd, &u.req, sizeof(u.req), 0);
+	if (r < 0) return r;
+
+	while (1) {
+		r = recv(fd, u.buf, sizeof(u.buf), MSG_DONTWAIT);
+		if (r <= 0) return -1;
+		for (h = &u.reply; NLMSG_OK(h, (void*)&u.buf[r]); h = NLMSG_NEXT(h)) {
+			if (h->nlmsg_type == NLMSG_DONE) return 0;
+			if (h->nlmsg_type == NLMSG_ERROR) return -1;
+			ret = cb(ctx, h);
+			if (ret) return ret;
+		}
+	}
+}
+
+int __rtnetlink_enumerate(int link_af, int addr_af, int (*cb)(void *ctx, struct nlmsghdr *h), void *ctx)
+{
+	int fd, r;
+
+	fd = socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE);
+	if (fd < 0) return -1;
+	r = __netlink_enumerate(fd, 1, RTM_GETLINK, link_af, cb, ctx);
+	if (!r) r = __netlink_enumerate(fd, 2, RTM_GETADDR, addr_af, cb, ctx);
+	__syscall(SYS_close,fd);
+	return r;
+}
diff --git a/fusl/src/network/netlink.h b/fusl/src/network/netlink.h
new file mode 100644
index 0000000..20700ac
--- /dev/null
+++ b/fusl/src/network/netlink.h
@@ -0,0 +1,94 @@
+#include <stdint.h>
+
+/* linux/netlink.h */
+
+#define NETLINK_ROUTE 0
+
+struct nlmsghdr {
+	uint32_t	nlmsg_len;
+	uint16_t	nlmsg_type;
+	uint16_t	nlmsg_flags;
+	uint32_t	nlmsg_seq;
+	uint32_t	nlmsg_pid;
+};
+
+#define NLM_F_REQUEST	1
+#define NLM_F_MULTI	2
+#define NLM_F_ACK	4
+
+#define NLM_F_ROOT	0x100
+#define NLM_F_MATCH	0x200
+#define NLM_F_ATOMIC	0x400
+#define NLM_F_DUMP	(NLM_F_ROOT|NLM_F_MATCH)
+
+#define NLMSG_NOOP	0x1
+#define NLMSG_ERROR	0x2
+#define NLMSG_DONE	0x3
+#define NLMSG_OVERRUN	0x4
+
+/* linux/rtnetlink.h */
+
+#define RTM_NEWLINK	16
+#define RTM_GETLINK	18
+#define RTM_NEWADDR	20
+#define RTM_GETADDR	22
+
+struct rtattr {
+	unsigned short	rta_len;
+	unsigned short	rta_type;
+};
+
+struct rtgenmsg {
+	unsigned char	rtgen_family;
+};
+
+struct ifinfomsg {
+	unsigned char	ifi_family;
+	unsigned char	__ifi_pad;
+	unsigned short	ifi_type;
+	int		ifi_index;
+	unsigned	ifi_flags;
+	unsigned	ifi_change;
+};
+
+/* linux/if_link.h */
+
+#define IFLA_ADDRESS	1
+#define IFLA_BROADCAST	2
+#define IFLA_IFNAME	3
+#define IFLA_STATS	7
+
+/* linux/if_addr.h */
+
+struct ifaddrmsg {
+	uint8_t		ifa_family;
+	uint8_t		ifa_prefixlen;
+	uint8_t		ifa_flags;
+	uint8_t		ifa_scope;
+	uint32_t	ifa_index;
+};
+
+#define IFA_ADDRESS	1
+#define IFA_LOCAL	2
+#define IFA_LABEL	3
+#define IFA_BROADCAST	4
+
+/* musl */
+
+#define NETLINK_ALIGN(len)	(((len)+3) & ~3)
+#define NLMSG_DATA(nlh)		((void*)((char*)(nlh)+sizeof(struct nlmsghdr)))
+#define NLMSG_DATALEN(nlh)	((nlh)->nlmsg_len-sizeof(struct nlmsghdr))
+#define NLMSG_DATAEND(nlh)	((char*)(nlh)+(nlh)->nlmsg_len)
+#define NLMSG_NEXT(nlh)		(struct nlmsghdr*)((char*)(nlh)+NETLINK_ALIGN((nlh)->nlmsg_len))
+#define NLMSG_OK(nlh,end)	((char*)(end)-(char*)(nlh) >= sizeof(struct nlmsghdr))
+
+#define RTA_DATA(rta)		((void*)((char*)(rta)+sizeof(struct rtattr)))
+#define RTA_DATALEN(rta)	((rta)->rta_len-sizeof(struct rtattr))
+#define RTA_DATAEND(rta)	((char*)(rta)+(rta)->rta_len)
+#define RTA_NEXT(rta)		(struct rtattr*)((char*)(rta)+NETLINK_ALIGN((rta)->rta_len))
+#define RTA_OK(nlh,end)		((char*)(end)-(char*)(rta) >= sizeof(struct rtattr))
+
+#define NLMSG_RTA(nlh,len)	((void*)((char*)(nlh)+sizeof(struct nlmsghdr)+NETLINK_ALIGN(len)))
+#define NLMSG_RTAOK(rta,nlh)	RTA_OK(rta,NLMSG_DATAEND(nlh))
+
+int __rtnetlink_enumerate(int link_af, int addr_af, int (*cb)(void *ctx, struct nlmsghdr *h), void *ctx);
diff --git a/fusl/src/network/netname.c b/fusl/src/network/netname.c
new file mode 100644
index 0000000..ba6e665
--- /dev/null
+++ b/fusl/src/network/netname.c
@@ -0,0 +1,12 @@
+#include <netdb.h>
+
+struct netent *getnetbyaddr(uint32_t net, int type)
+{
+	return 0;
+}
+
+struct netent *getnetbyname(const char *name)
+{
+	return 0;
+}
+
diff --git a/fusl/src/network/ns_parse.c b/fusl/src/network/ns_parse.c
new file mode 100644
index 0000000..d01da47
--- /dev/null
+++ b/fusl/src/network/ns_parse.c
@@ -0,0 +1,171 @@
+#define _BSD_SOURCE
+#include <errno.h>
+#include <stddef.h>
+#include <resolv.h>
+#include <arpa/nameser.h>
+
+const struct _ns_flagdata _ns_flagdata[16] = {
+	{ 0x8000, 15 },
+	{ 0x7800, 11 },
+	{ 0x0400, 10 },
+	{ 0x0200, 9 },
+	{ 0x0100, 8 },
+	{ 0x0080, 7 },
+	{ 0x0040, 6 },
+	{ 0x0020, 5 },
+	{ 0x0010, 4 },
+	{ 0x000f, 0 },
+	{ 0x0000, 0 },
+	{ 0x0000, 0 },
+	{ 0x0000, 0 },
+	{ 0x0000, 0 },
+	{ 0x0000, 0 },
+	{ 0x0000, 0 },
+};
+
+unsigned ns_get16(const unsigned char *cp)
+{
+	return cp[0]<<8 | cp[1];
+}
+
+unsigned long ns_get32(const unsigned char *cp)
+{
+	return (unsigned)cp[0]<<24 | cp[1]<<16 | cp[2]<<8 | cp[3];
+}
+
+void ns_put16(unsigned s, unsigned char *cp)
+{
+	*cp++ = s>>8;
+	*cp++ = s;
+}
+
+void ns_put32(unsigned long l, unsigned char *cp)
+{
+	*cp++ = l>>24;
+	*cp++ = l>>16;
+	*cp++ = l>>8;
+	*cp++ = l;
+}
+
+int ns_initparse(const unsigned char *msg, int msglen, ns_msg *handle)
+{
+	int i, r;
+
+	handle->_msg = msg;
+	handle->_eom = msg + msglen;
+	if (msglen < (2 + ns_s_max) * NS_INT16SZ) goto bad;
+	NS_GET16(handle->_id, msg);
+	NS_GET16(handle->_flags, msg);
+	for (i = 0; i < ns_s_max; i++) NS_GET16(handle->_counts[i], msg);
+	for (i = 0; i < ns_s_max; i++) {
+		if (handle->_counts[i]) {
+			handle->_sections[i] = msg;
+			r = ns_skiprr(msg, handle->_eom, i, handle->_counts[i]);
+			if (r < 0) return -1;
+			msg += r;
+		} else {
+			handle->_sections[i] = NULL;
+		}
+	}
+	if (msg != handle->_eom) goto bad;
+	handle->_sect = ns_s_max;
+	handle->_rrnum = -1;
+	handle->_msg_ptr = NULL;
+	return 0;
+bad:
+	errno = EMSGSIZE;
+	return -1;
+}
+
+int ns_skiprr(const unsigned char *ptr, const unsigned char *eom, ns_sect section, int count)
+{
+	const unsigned char *p = ptr;
+	int r;
+
+	while (count--) {
+		r = dn_skipname(p, eom);
+		if (r < 0) goto bad;
+		if (r + 2 * NS_INT16SZ > eom - p) goto bad;
+		p += r + 2 * NS_INT16SZ;
+		if (section != ns_s_qd) {
+			if (NS_INT32SZ + NS_INT16SZ > eom - p) goto bad;
+			p += NS_INT32SZ;
+			NS_GET16(r, p);
+			if (r > eom - p) goto bad;
+			p += r;
+		}
+	}
+	return p - ptr;
+bad:
+	errno = EMSGSIZE;
+	return -1;
+}
+
+int ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr)
+{
+	int r;
+
+	if (section < 0 || section >= ns_s_max) goto bad;
+	if (section != handle->_sect) {
+		handle->_sect = section;
+		handle->_rrnum = 0;
+		handle->_msg_ptr = handle->_sections[section];
+	}
+	if (rrnum == -1) rrnum = handle->_rrnum;
+	if (rrnum < 0 || rrnum >= handle->_counts[section]) goto bad;
+	if (rrnum < handle->_rrnum) {
+		handle->_rrnum = 0;
+		handle->_msg_ptr = handle->_sections[section];
+	}
+	if (rrnum > handle->_rrnum) {
+		r = ns_skiprr(handle->_msg_ptr, handle->_eom, section, rrnum - handle->_rrnum);
+		if (r < 0) return -1;
+		handle->_msg_ptr += r;
+		handle->_rrnum = rrnum;
+	}
+	r = ns_name_uncompress(handle->_msg, handle->_eom, handle->_msg_ptr, rr->name, NS_MAXDNAME);
+	if (r < 0) return -1;
+	handle->_msg_ptr += r;
+	if (2 * NS_INT16SZ > handle->_eom - handle->_msg_ptr) goto size;
+	NS_GET16(rr->type, handle->_msg_ptr);
+	NS_GET16(rr->rr_class, handle->_msg_ptr);
+	if (section != ns_s_qd) {
+		if (NS_INT32SZ + NS_INT16SZ > handle->_eom - handle->_msg_ptr) goto size;
+		NS_GET32(rr->ttl, handle->_msg_ptr);
+		NS_GET16(rr->rdlength, handle->_msg_ptr);
+		if (rr->rdlength > handle->_eom - handle->_msg_ptr) goto size;
+		rr->rdata = handle->_msg_ptr;
+		handle->_msg_ptr += rr->rdlength;
+	} else {
+		rr->ttl = 0;
+		rr->rdlength = 0;
+		rr->rdata = NULL;
+	}
+	handle->_rrnum++;
+	if (handle->_rrnum > handle->_counts[section]) {
+		handle->_sect = section + 1;
+		if (handle->_sect == ns_s_max) {
+			handle->_rrnum = -1;
+			handle->_msg_ptr = NULL;
+		} else {
+			handle->_rrnum = 0;
+		}
+	}
+	return 0;
+bad:
+	errno = ENODEV;
+	return -1;
+size:
+	errno = EMSGSIZE;
+	return -1;
+}
+
+int ns_name_uncompress(const unsigned char *msg, const unsigned char *eom,
+                       const unsigned char *src, char *dst, size_t dstsiz)
+{
+	int r;
+	r = dn_expand(msg, eom, src, dst, dstsiz);
+	if (r < 0) errno = EMSGSIZE;
+	return r;
+}
+
diff --git a/fusl/src/network/ntohl.c b/fusl/src/network/ntohl.c
new file mode 100644
index 0000000..d6fce45
--- /dev/null
+++ b/fusl/src/network/ntohl.c
@@ -0,0 +1,8 @@
+#include <netinet/in.h>
+#include <byteswap.h>
+
+uint32_t ntohl(uint32_t n)
+{
+	union { int i; char c; } u = { 1 };
+	return u.c ? bswap_32(n) : n;
+}
diff --git a/fusl/src/network/ntohs.c b/fusl/src/network/ntohs.c
new file mode 100644
index 0000000..745cef4
--- /dev/null
+++ b/fusl/src/network/ntohs.c
@@ -0,0 +1,8 @@
+#include <netinet/in.h>
+#include <byteswap.h>
+
+uint16_t ntohs(uint16_t n)
+{
+	union { int i; char c; } u = { 1 };
+	return u.c ? bswap_16(n) : n;
+}
diff --git a/fusl/src/network/proto.c b/fusl/src/network/proto.c
new file mode 100644
index 0000000..a42d145
--- /dev/null
+++ b/fusl/src/network/proto.c
@@ -0,0 +1,84 @@
+#include <netdb.h>
+#include <string.h>
+
+/* do we really need all these?? */
+
+static int idx;
+static const unsigned char protos[] = {
+	"\000ip\0"
+	"\001icmp\0"
+	"\002igmp\0"
+	"\003ggp\0"
+	"\004ipencap\0"
+	"\005st\0"
+	"\006tcp\0"
+	"\008egp\0"
+	"\014pup\0"
+	"\021udp\0"
+	"\024hmp\0"
+	"\026xns-idp\0"
+	"\033rdp\0"
+	"\035iso-tp4\0"
+	"\044xtp\0"
+	"\045ddp\0"
+	"\046idpr-cmtp\0"
+	"\051ipv6\0"
+	"\053ipv6-route\0"
+	"\054ipv6-frag\0"
+	"\055idrp\0"
+	"\056rsvp\0"
+	"\057gre\0"
+	"\062esp\0"
+	"\063ah\0"
+	"\071skip\0"
+	"\072ipv6-icmp\0"
+	"\073ipv6-nonxt\0"
+	"\074ipv6-opts\0"
+	"\111rspf\0"
+	"\121vmtp\0"
+	"\131ospf\0"
+	"\136ipip\0"
+	"\142encap\0"
+	"\147pim\0"
+	"\377raw"
+};
+
+void endprotoent(void)
+{
+	idx = 0;
+}
+
+void setprotoent(int stayopen)
+{
+	idx = 0;
+}
+
+struct protoent *getprotoent(void)
+{
+	static struct protoent p;
+	static const char *aliases;
+	if (idx >= sizeof protos) return NULL;
+	p.p_proto = protos[idx];
+	p.p_name = (char *)&protos[idx+1];
+	p.p_aliases = (char **)&aliases;
+	idx += strlen(p.p_name) + 2;
+	return &p;
+}
+
+struct protoent *getprotobyname(const char *name)
+{
+	struct protoent *p;
+	endprotoent();
+	do p = getprotoent();
+	while (p && strcmp(name, p->p_name));
+	return p;
+}
+
+struct protoent *getprotobynumber(int num)
+{
+	struct protoent *p;
+	endprotoent();
+	do p = getprotoent();
+	while (p && p->p_proto != num);
+	return p;
+}
diff --git a/fusl/src/network/recv.c b/fusl/src/network/recv.c
new file mode 100644
index 0000000..5970048
--- /dev/null
+++ b/fusl/src/network/recv.c
@@ -0,0 +1,6 @@
+#include <sys/socket.h>
+
+ssize_t recv(int fd, void *buf, size_t len, int flags)
+{
+	return recvfrom(fd, buf, len, flags, 0, 0);
+}
diff --git a/fusl/src/network/recvfrom.c b/fusl/src/network/recvfrom.c
new file mode 100644
index 0000000..436f344
--- /dev/null
+++ b/fusl/src/network/recvfrom.c
@@ -0,0 +1,8 @@
+#include <sys/socket.h>
+#include "syscall.h"
+#include "libc.h"
+
+ssize_t recvfrom(int fd, void *restrict buf, size_t len, int flags, struct sockaddr *restrict addr, socklen_t *restrict alen)
+{
+	return socketcall_cp(recvfrom, fd, buf, len, flags, addr, alen);
+}
diff --git a/fusl/src/network/recvmmsg.c b/fusl/src/network/recvmmsg.c
new file mode 100644
index 0000000..58b1b2f
--- /dev/null
+++ b/fusl/src/network/recvmmsg.c
@@ -0,0 +1,15 @@
+#define _GNU_SOURCE
+#include <sys/socket.h>
+#include <limits.h>
+#include "syscall.h"
+
+int recvmmsg(int fd, struct mmsghdr *msgvec, unsigned int vlen, unsigned int flags, struct timespec *timeout)
+{
+#if LONG_MAX > INT_MAX
+	struct mmsghdr *mh = msgvec;
+	unsigned int i;
+	for (i = vlen; i; i--, mh++)
+		mh->msg_hdr.__pad1 = mh->msg_hdr.__pad2 = 0;
+#endif
+	return syscall_cp(SYS_recvmmsg, fd, msgvec, vlen, flags, timeout);
+}
diff --git a/fusl/src/network/recvmsg.c b/fusl/src/network/recvmsg.c
new file mode 100644
index 0000000..4f52665
--- /dev/null
+++ b/fusl/src/network/recvmsg.c
@@ -0,0 +1,22 @@
+#include <sys/socket.h>
+#include <limits.h>
+#include "syscall.h"
+#include "libc.h"
+
+ssize_t recvmsg(int fd, struct msghdr *msg, int flags)
+{
+	ssize_t r;
+#if LONG_MAX > INT_MAX
+	struct msghdr h, *orig = msg;
+	if (msg) {
+		h = *msg;
+		h.__pad1 = h.__pad2 = 0;
+		msg = &h;
+	}
+#endif
+	r = socketcall_cp(recvmsg, fd, msg, flags, 0, 0, 0);
+#if LONG_MAX > INT_MAX
+	if (orig) *orig = h;
+#endif
+	return r;
+}
diff --git a/fusl/src/network/res_init.c b/fusl/src/network/res_init.c
new file mode 100644
index 0000000..5dba9df
--- /dev/null
+++ b/fusl/src/network/res_init.c
@@ -0,0 +1,6 @@
+#include <resolv.h>
+
+int res_init()
+{
+	return 0;
+}
diff --git a/fusl/src/network/res_mkquery.c b/fusl/src/network/res_mkquery.c
new file mode 100644
index 0000000..ec4568a
--- /dev/null
+++ b/fusl/src/network/res_mkquery.c
@@ -0,0 +1,44 @@
+#include <resolv.h>
+#include <string.h>
+#include <time.h>
+#include "libc.h"
+
+int __res_mkquery(int op, const char *dname, int class, int type,
+	const unsigned char *data, int datalen,
+	const unsigned char *newrr, unsigned char *buf, int buflen)
+{
+	int id, i, j;
+	unsigned char q[280];
+	struct timespec ts;
+	size_t l = strnlen(dname, 255);
+	int n;
+
+	if (l && dname[l-1]=='.') l--;
+	n = 17+l+!!l;
+	if (l>253 || buflen<n || op>15u || class>255u || type>255u)
+		return -1;
+
+	/* Construct query template - ID will be filled later */
+	memset(q, 0, n);
+	q[2] = op*8 + 1;
+	q[5] = 1;
+	memcpy((char *)q+13, dname, l);
+	for (i=13; q[i]; i=j+1) {
+		for (j=i; q[j] && q[j] != '.'; j++);
+		if (j-i-1u > 62u) return -1;
+		q[i-1] = j-i;
+	}
+	q[i+1] = type;
+	q[i+3] = class;
+
+	/* Make a reasonably unpredictable id */
+	clock_gettime(CLOCK_REALTIME, &ts);
+	id = ts.tv_nsec + ts.tv_nsec/65536UL & 0xffff;
+	q[0] = id/256;
+	q[1] = id;
+
+	memcpy(buf, q, n);
+	return n;
+}
+
+weak_alias(__res_mkquery, res_mkquery);
diff --git a/fusl/src/network/res_msend.c b/fusl/src/network/res_msend.c
new file mode 100644
index 0000000..d0e8e48
--- /dev/null
+++ b/fusl/src/network/res_msend.c
@@ -0,0 +1,218 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <stdint.h>
+#include <string.h>
+#include <poll.h>
+#include <time.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <errno.h>
+#include <pthread.h>
+#include "stdio_impl.h"
+#include "syscall.h"
+#include "lookup.h"
+
+static void cleanup(void *p)
+{
+	__syscall(SYS_close, (intptr_t)p);
+}
+
+static unsigned long mtime()
+{
+	struct timespec ts;
+	clock_gettime(CLOCK_REALTIME, &ts);
+	return (unsigned long)ts.tv_sec * 1000
+		+ ts.tv_nsec / 1000000;
+}
+
+int __res_msend(int nqueries, const unsigned char *const *queries,
+	const int *qlens, unsigned char *const *answers, int *alens, int asize)
+{
+	int fd;
+	FILE *f, _f;
+	unsigned char _buf[256];
+	char line[64], *s, *z;
+	int timeout = 5000, attempts = 2, retry_interval, servfail_retry;
+	union {
+		struct sockaddr_in sin;
+		struct sockaddr_in6 sin6;
+	} sa = {0}, ns[3] = {{0}};
+	socklen_t sl = sizeof sa.sin;
+	int nns = 0;
+	int family = AF_INET;
+	int rlen;
+	int next;
+	int i, j;
+	int cs;
+	struct pollfd pfd;
+	unsigned long t0, t1, t2;
+	struct address iplit;
+
+	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
+
+	/* Get nameservers from resolv.conf, fallback to localhost */
+	f = __fopen_rb_ca("/etc/resolv.conf", &_f, _buf, sizeof _buf);
+	if (!f) switch (errno) {
+	case ENOENT:
+	case ENOTDIR:
+	case EACCES:
+		goto no_resolv_conf;
+	default:
+		return -1;
+	}
+	for (nns=0; nns<3 && fgets(line, sizeof line, f); ) {
+		if (!strncmp(line, "options", 7) && isspace(line[7])) {
+			unsigned long x;
+			char *p, *z;
+			p = strstr(line, "timeout:");
+			if (p && isdigit(p[8])) {
+				p += 8;
+				x = strtoul(p, &z, 10);
+				if (z != p) timeout = x < 30 ? x*1000 : 30000;
+			}
+			p = strstr(line, "attempts:");
+			if (p && isdigit(p[9])) {
+				p += 9;
+				x = strtoul(p, &z, 10);
+				if (z != p) attempts = x < 10 ? x : 10;
+				if (!attempts) attempts = 1;
+			}
+		}
+		if (strncmp(line, "nameserver", 10) || !isspace(line[10]))
+			continue;
+		for (s=line+11; isspace(*s); s++);
+		for (z=s; *z && !isspace(*z); z++);
+		*z=0;
+
+		if (__lookup_ipliteral(&iplit, s, AF_UNSPEC)>0) {
+			if (iplit.family == AF_INET) {
+				memcpy(&ns[nns].sin.sin_addr, iplit.addr, 4);
+				ns[nns].sin.sin_port = htons(53);
+				ns[nns++].sin.sin_family = AF_INET;
+			} else {
+				sl = sizeof sa.sin6;
+				memcpy(&ns[nns].sin6.sin6_addr, iplit.addr, 16);
+				ns[nns].sin6.sin6_port = htons(53);
+				ns[nns].sin6.sin6_scope_id = iplit.scopeid;
+				ns[nns++].sin6.sin6_family = family = AF_INET6;
+			}
+		}
+	}
+	__fclose_ca(f);
+no_resolv_conf:
+	if (!nns) {
+		ns[0].sin.sin_family = AF_INET;
+		ns[0].sin.sin_port = htons(53);
+		ns[0].sin.sin_addr.s_addr = htonl(0x7f000001);
+		nns=1;
+	}
+
+	/* Get local address and open/bind a socket */
+	sa.sin.sin_family = family;
+	fd = socket(family, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+
+	/* Handle case where system lacks IPv6 support */
+	if (fd < 0 && family == AF_INET6 && errno == EAFNOSUPPORT) {
+		fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+		family = AF_INET;
+	}
+	if (fd < 0 || bind(fd, (void *)&sa, sl) < 0) return -1;
+
+	/* Past this point, there are no errors. Each individual query will
+	 * yield either no reply (indicated by zero length) or an answer
+	 * packet which is up to the caller to interpret. */
+
+	pthread_cleanup_push(cleanup, (void *)(intptr_t)fd);
+	pthread_setcancelstate(cs, 0);
+
+	/* Convert any IPv4 addresses in a mixed environment to v4-mapped */
+	if (family == AF_INET6) {
+		setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &(int){0}, sizeof 0);
+		for (i=0; i<nns; i++) {
+			if (ns[i].sin.sin_family != AF_INET) continue;
+			memcpy(ns[i].sin6.sin6_addr.s6_addr+12,
+				&ns[i].sin.sin_addr, 4);
+			memcpy(ns[i].sin6.sin6_addr.s6_addr,
+				"\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
+			ns[i].sin6.sin6_family = AF_INET6;
+			ns[i].sin6.sin6_flowinfo = 0;
+			ns[i].sin6.sin6_scope_id = 0;
+		}
+	}
+
+	memset(alens, 0, sizeof *alens * nqueries);
+
+	pfd.fd = fd;
+	pfd.events = POLLIN;
+	retry_interval = timeout / attempts;
+	next = 0;
+	t0 = t2 = mtime();
+	t1 = t2 - retry_interval;
+
+	for (; t2-t0 < timeout; t2=mtime()) {
+		if (t2-t1 >= retry_interval) {
+			/* Query all configured namservers in parallel */
+			for (i=0; i<nqueries; i++)
+				if (!alens[i])
+					for (j=0; j<nns; j++)
+						sendto(fd, queries[i],
+							qlens[i], MSG_NOSIGNAL,
+							(void *)&ns[j], sl);
+			t1 = t2;
+			servfail_retry = 2 * nqueries;
+		}
+
+		/* Wait for a response, or until time to retry */
+		if (poll(&pfd, 1, t1+retry_interval-t2) <= 0) continue;
+
+		while ((rlen = recvfrom(fd, answers[next], asize, 0,
+		  (void *)&sa, (socklen_t[1]){sl})) >= 0) {
+
+			/* Ignore non-identifiable packets */
+			if (rlen < 4) continue;
+
+			/* Ignore replies from addresses we didn't send to */
+			for (j=0; j<nns && memcmp(ns+j, &sa, sl); j++);
+			if (j==nns) continue;
+
+			/* Find which query this answer goes with, if any */
+			for (i=next; i<nqueries && (
+				answers[next][0] != queries[i][0] ||
+				answers[next][1] != queries[i][1] ); i++);
+			if (i==nqueries) continue;
+			if (alens[i]) continue;
+
+			/* Only accept positive or negative responses;
+			 * retry immediately on server failure, and ignore
+			 * all other codes such as refusal. */
+			switch (answers[next][3] & 15) {
+			case 0:
+			case 3:
+				break;
+			case 2:
+				if (servfail_retry && servfail_retry--)
+					sendto(fd, queries[i],
+						qlens[i], MSG_NOSIGNAL,
+						(void *)&ns[j], sl);
+			default:
+				continue;
+			}
+
+			/* Store answer in the right slot, or update next
+			 * available temp slot if it's already in place. */
+			alens[i] = rlen;
+			if (i == next)
+				for (; next<nqueries && alens[next]; next++);
+			else
+				memcpy(answers[i], answers[next], rlen);
+
+			if (next == nqueries) goto out;
+		}
+	}
+out:
+	pthread_cleanup_pop(1);
+
+	return 0;
+}
diff --git a/fusl/src/network/res_query.c b/fusl/src/network/res_query.c
new file mode 100644
index 0000000..2b4e4bb
--- /dev/null
+++ b/fusl/src/network/res_query.c
@@ -0,0 +1,17 @@
+#include <resolv.h>
+#include <netdb.h>
+#include "libc.h"
+
+int __res_mkquery(int, const char *, int, int, const unsigned char *, int, const unsigned char*, unsigned char *, int);
+int __res_send(const unsigned char *, int, unsigned char *, int);
+
+int __res_query(const char *name, int class, int type, unsigned char *dest, int len)
+{
+	unsigned char q[280];
+	int ql = __res_mkquery(0, name, class, type, 0, 0, 0, q, sizeof q);
+	if (ql < 0) return ql;
+	return __res_send(q, ql, dest, len);
+}
+
+weak_alias(__res_query, res_query);
+weak_alias(__res_query, res_search);
diff --git a/fusl/src/network/res_querydomain.c b/fusl/src/network/res_querydomain.c
new file mode 100644
index 0000000..727e6f6
--- /dev/null
+++ b/fusl/src/network/res_querydomain.c
@@ -0,0 +1,14 @@
+#include <resolv.h>
+#include <string.h>
+
+int res_querydomain(const char *name, const char *domain, int class, int type, unsigned char *dest, int len)
+{
+	char tmp[255];
+	size_t nl = strnlen(name, 255);
+	size_t dl = strnlen(domain, 255);
+	if (nl+dl+1 > 254) return -1;
+	memcpy(tmp, name, nl);
+	tmp[nl] = '.';
+	memcpy(tmp+nl+1, domain, dl+1);
+	return res_query(tmp, class, type, dest, len);
+}
diff --git a/fusl/src/network/res_send.c b/fusl/src/network/res_send.c
new file mode 100644
index 0000000..19cfe0f
--- /dev/null
+++ b/fusl/src/network/res_send.c
@@ -0,0 +1,12 @@
+#include <resolv.h>
+#include "libc.h"
+
+int __res_msend(int, const unsigned char *const *, const int *, unsigned char *const *, int *, int);
+
+int __res_send(const unsigned char *msg, int msglen, unsigned char *answer, int anslen)
+{
+	int r = __res_msend(1, &msg, &msglen, &answer, &anslen, anslen);
+	return r<0 ? r : anslen;
+}
+
+weak_alias(__res_send, res_send);
diff --git a/fusl/src/network/res_state.c b/fusl/src/network/res_state.c
new file mode 100644
index 0000000..5c42cda
--- /dev/null
+++ b/fusl/src/network/res_state.c
@@ -0,0 +1,9 @@
+#include <resolv.h>
+
+/* This is completely unused, and exists purely to satisfy broken apps. */
+
+struct __res_state *__res_state()
+{
+	static struct __res_state res;
+	return &res;
+}
diff --git a/fusl/src/network/send.c b/fusl/src/network/send.c
new file mode 100644
index 0000000..9f10497
--- /dev/null
+++ b/fusl/src/network/send.c
@@ -0,0 +1,6 @@
+#include <sys/socket.h>
+
+ssize_t send(int fd, const void *buf, size_t len, int flags)
+{
+	return sendto(fd, buf, len, flags, 0, 0);
+}
diff --git a/fusl/src/network/sendmmsg.c b/fusl/src/network/sendmmsg.c
new file mode 100644
index 0000000..eeae1d0
--- /dev/null
+++ b/fusl/src/network/sendmmsg.c
@@ -0,0 +1,30 @@
+#define _GNU_SOURCE
+#include <sys/socket.h>
+#include <limits.h>
+#include <errno.h>
+#include "syscall.h"
+
+int sendmmsg(int fd, struct mmsghdr *msgvec, unsigned int vlen, unsigned int flags)
+{
+#if LONG_MAX > INT_MAX
+	/* Can't use the syscall directly because the kernel has the wrong
+	 * idea for the types of msg_iovlen, msg_controllen, and cmsg_len,
+	 * and the cmsg blocks cannot be modified in-place. */
+	int i;
+	if (vlen > IOV_MAX) vlen = IOV_MAX; /* This matches the kernel. */
+	if (!vlen) return 0;
+	for (i=0; i<vlen; i++) {
+		/* As an unfortunate inconsistency, the sendmmsg API uses
+		 * unsigned int for the resulting msg_len, despite sendmsg
+		 * returning ssize_t. However Linux limits the total bytes
+		 * sent by sendmsg to INT_MAX, so the assignment is safe. */
+		ssize_t r = sendmsg(fd, &msgvec[i].msg_hdr, flags);
+		if (r < 0) goto error;
+		msgvec[i].msg_len = r;
+	}
+error:
+	return i ? i : -1;
+#else
+	return syscall_cp(SYS_sendmmsg, fd, msgvec, vlen, flags);
+#endif
+}
diff --git a/fusl/src/network/sendmsg.c b/fusl/src/network/sendmsg.c
new file mode 100644
index 0000000..5f08000
--- /dev/null
+++ b/fusl/src/network/sendmsg.c
@@ -0,0 +1,30 @@
+#include <sys/socket.h>
+#include <limits.h>
+#include <string.h>
+#include <errno.h>
+#include "syscall.h"
+#include "libc.h"
+
+ssize_t sendmsg(int fd, const struct msghdr *msg, int flags)
+{
+#if LONG_MAX > INT_MAX
+	struct msghdr h;
+	struct cmsghdr chbuf[1024/sizeof(struct cmsghdr)+1], *c;
+	if (msg) {
+		h = *msg;
+		h.__pad1 = h.__pad2 = 0;
+		msg = &h;
+		if (h.msg_controllen) {
+			if (h.msg_controllen > 1024) {
+				errno = ENOMEM;
+				return -1;
+			}
+			memcpy(chbuf, h.msg_control, h.msg_controllen);
+			h.msg_control = chbuf;
+			for (c=CMSG_FIRSTHDR(&h); c; c=CMSG_NXTHDR(&h,c))
+				c->__pad1 = 0;
+		}
+	}
+#endif
+	return socketcall_cp(sendmsg, fd, msg, flags, 0, 0, 0);
+}
diff --git a/fusl/src/network/sendto.c b/fusl/src/network/sendto.c
new file mode 100644
index 0000000..899eecf
--- /dev/null
+++ b/fusl/src/network/sendto.c
@@ -0,0 +1,8 @@
+#include <sys/socket.h>
+#include "syscall.h"
+#include "libc.h"
+
+ssize_t sendto(int fd, const void *buf, size_t len, int flags, const struct sockaddr *addr, socklen_t alen)
+{
+	return socketcall_cp(sendto, fd, buf, len, flags, addr, alen);
+}
diff --git a/fusl/src/network/serv.c b/fusl/src/network/serv.c
new file mode 100644
index 0000000..41424e8
--- /dev/null
+++ b/fusl/src/network/serv.c
@@ -0,0 +1,14 @@
+#include <netdb.h>
+
+void endservent(void)
+{
+}
+
+void setservent(int stayopen)
+{
+}
+
+struct servent *getservent(void)
+{
+	return 0;
+}
diff --git a/fusl/src/network/setsockopt.c b/fusl/src/network/setsockopt.c
new file mode 100644
index 0000000..c960c9c
--- /dev/null
+++ b/fusl/src/network/setsockopt.c
@@ -0,0 +1,7 @@
+#include <sys/socket.h>
+#include "syscall.h"
+
+int setsockopt(int fd, int level, int optname, const void *optval, socklen_t optlen)
+{
+	return socketcall(setsockopt, fd, level, optname, optval, optlen, 0);
+}
diff --git a/fusl/src/network/shutdown.c b/fusl/src/network/shutdown.c
new file mode 100644
index 0000000..10ca21a
--- /dev/null
+++ b/fusl/src/network/shutdown.c
@@ -0,0 +1,7 @@
+#include <sys/socket.h>
+#include "syscall.h"
+
+int shutdown(int fd, int how)
+{
+	return socketcall(shutdown, fd, how, 0, 0, 0, 0);
+}
diff --git a/fusl/src/network/sockatmark.c b/fusl/src/network/sockatmark.c
new file mode 100644
index 0000000..f474551
--- /dev/null
+++ b/fusl/src/network/sockatmark.c
@@ -0,0 +1,10 @@
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+
+int sockatmark(int s)
+{
+	int ret;
+	if (ioctl(s, SIOCATMARK, &ret) < 0)
+		return -1;
+	return ret;
+}
diff --git a/fusl/src/network/socket.c b/fusl/src/network/socket.c
new file mode 100644
index 0000000..a2e92d9
--- /dev/null
+++ b/fusl/src/network/socket.c
@@ -0,0 +1,21 @@
+#include <sys/socket.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "syscall.h"
+
+int socket(int domain, int type, int protocol)
+{
+	int s = socketcall(socket, domain, type, protocol, 0, 0, 0);
+	if (s<0 && (errno==EINVAL || errno==EPROTONOSUPPORT)
+	    && (type&(SOCK_CLOEXEC|SOCK_NONBLOCK))) {
+		s = socketcall(socket, domain,
+			type & ~(SOCK_CLOEXEC|SOCK_NONBLOCK),
+			protocol, 0, 0, 0);
+		if (s < 0) return s;
+		if (type & SOCK_CLOEXEC)
+			__syscall(SYS_fcntl, s, F_SETFD, FD_CLOEXEC);
+		if (type & SOCK_NONBLOCK)
+			__syscall(SYS_fcntl, s, F_SETFL, O_NONBLOCK);
+	}
+	return s;
+}
diff --git a/fusl/src/network/socketpair.c b/fusl/src/network/socketpair.c
new file mode 100644
index 0000000..f348962
--- /dev/null
+++ b/fusl/src/network/socketpair.c
@@ -0,0 +1,25 @@
+#include <sys/socket.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "syscall.h"
+
+int socketpair(int domain, int type, int protocol, int fd[2])
+{
+	int r = socketcall(socketpair, domain, type, protocol, fd, 0, 0);
+	if (r<0 && (errno==EINVAL || errno==EPROTONOSUPPORT)
+	    && (type&(SOCK_CLOEXEC|SOCK_NONBLOCK))) {
+		r = socketcall(socketpair, domain,
+			type & ~(SOCK_CLOEXEC|SOCK_NONBLOCK),
+			protocol, fd, 0, 0);
+		if (r < 0) return r;
+		if (type & SOCK_CLOEXEC) {
+			__syscall(SYS_fcntl, fd[0], F_SETFD, FD_CLOEXEC);
+			__syscall(SYS_fcntl, fd[1], F_SETFD, FD_CLOEXEC);
+		}
+		if (type & SOCK_NONBLOCK) {
+			__syscall(SYS_fcntl, fd[0], F_SETFL, O_NONBLOCK);
+			__syscall(SYS_fcntl, fd[1], F_SETFL, O_NONBLOCK);
+		}
+	}
+	return r;
+}