From 695843c79edcbda68b05cc67efb4f38f967d09b4 Mon Sep 17 00:00:00 2001
From: leitner <leitner>
Date: Thu, 23 Apr 2015 15:15:08 +0000
Subject: [PATCH] small buffer optimization fix botched noipv6 case in
 buffer_tcp6

---
 Makefile                          | 31 +++++++++++++++++--------------
 array/iarray_allocate.c           |  5 ++++-
 buffer.h                          |  6 ++++--
 buffer/buffer_put.c               | 17 ++++++++++++++---
 socket/socket_fastopen.c          |  2 ++
 socket/socket_fastopen_connect4.c |  4 ++++
 socket/socket_fastopen_connect6.c |  6 +++++-
 socket/socket_quickack.c          |  2 ++
 socket/socket_tcp6.c              | 13 ++++++++++++-
 9 files changed, 64 insertions(+), 22 deletions(-)

diff --git a/Makefile b/Makefile
index 2143ce0..a445edc 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ MAN3DIR=${prefix}/man/man3
 
 LIBS=byte.a fmt.a scan.a str.a uint.a open.a stralloc.a unix.a socket.a \
 buffer.a mmap.a taia.a tai.a dns.a case.a mult.a array.a io.a \
-textcode.a cdb.a
+textcode.a cdb.a critbit.a
 
 all: ent $(LIBS) libowfat.a libsocket t
 
@@ -136,7 +136,7 @@ cdb.o: cdb/cdb.c byte.h cdb.h uint32.h uint64.h
 cdb_hash.o: cdb/cdb_hash.c cdb.h uint32.h uint64.h
 cdb_make.o: cdb/cdb_make.c cdb.h uint32.h uint64.h cdb_make.h buffer.h
 cdb_traverse.o: cdb/cdb_traverse.c cdb.h uint32.h uint64.h
-critbit.o: critbit/critbit.c
+critbit.o: critbit/critbit.c critbit.h
 dns_dfd.o: dns/dns_dfd.c byte.h dns.h stralloc.h iopause.h taia.h tai.h \
  uint64.h uint32.h
 dns_domain.o: dns/dns_domain.c case.h byte.h dns.h stralloc.h iopause.h \
@@ -609,8 +609,8 @@ fmt_yenc.o: textcode/fmt_yenc.c fmt.h byte.h textcode.h
 scan_base64.o: textcode/scan_base64.c textcode.h haveinline.h
 scan_cescape.o: textcode/scan_cescape.c fmt.h byte.h textcode.h scan.h
 scan_hexdump.o: textcode/scan_hexdump.c fmt.h byte.h textcode.h scan.h
-scan_html.o: textcode/scan_html.c fmt.h byte.h textcode.h haveinline.h \
- scan.h case.h str.h
+scan_html.o: textcode/scan_html.c entities.h fmt.h byte.h textcode.h \
+ haveinline.h scan.h case.h str.h
 scan_jsonescape.o: textcode/scan_jsonescape.c fmt.h byte.h textcode.h \
  scan.h
 scan_ldapescape.o: textcode/scan_ldapescape.c fmt.h byte.h textcode.h \
@@ -652,7 +652,8 @@ winsock2errno.o: unix/winsock2errno.c
 t.o: t.c fmt.h byte.h scan.h str.h uint16.h uint32.h stralloc.h socket.h \
  buffer.h ip4.h ip6.h mmap.h open.h textcode.h dns.h iopause.h taia.h \
  tai.h uint64.h case.h errmsg.h iob.h io.h array.h safemult.h iarray.h \
- CAS.h io_internal.h haveepoll.h havekqueue.h havedevpoll.h havesigio.h
+ critbit.h CAS.h io_internal.h haveepoll.h havekqueue.h havedevpoll.h \
+ havesigio.h
 BYTE_OBJS=byte_chr.o byte_copy.o byte_copyr.o byte_diff.o byte_equal_notimingattack.o byte_rchr.o byte_zero.o 
 FMT_OBJS=fmt_8long.o fmt_8longlong.o fmt_asn1derlength.o fmt_asn1dertag.o fmt_double.o fmt_escapecharc.o fmt_escapecharhtml.o fmt_escapecharjson.o fmt_escapecharquotedprintable.o fmt_escapecharquotedprintableutf8.o fmt_escapecharxml.o fmt_fill.o fmt_httpdate.o fmt_human.o fmt_humank.o fmt_long.o fmt_longlong.o fmt_minus.o fmt_pad.o fmt_plusminus.o fmt_str.o fmt_strm_internal.o fmt_strn.o fmt_tohex.o fmt_ulong.o fmt_ulong0.o fmt_ulonglong.o fmt_utf8.o fmt_xlong.o fmt_xlonglong.o fmt_xmlescape.o 
 SCAN_OBJS=scan_8int.o scan_8long.o scan_8longlong.o scan_8longn.o scan_8short.o scan_asn1derlength.o scan_asn1dertag.o scan_charsetnskip.o scan_double.o scan_fromhex.o scan_httpdate.o scan_int.o scan_long.o scan_longlong.o scan_longn.o scan_netstring.o scan_noncharsetnskip.o scan_nonwhitenskip.o scan_plusminus.o scan_short.o scan_uint.o scan_ulong.o scan_ulonglong.o scan_ulongn.o scan_ushort.o scan_utf8.o scan_whitenskip.o scan_xint.o scan_xlong.o scan_xlonglong.o scan_xlongn.o scan_xshort.o 
@@ -661,7 +662,7 @@ UINT_OBJS=uint16_pack.o uint16_pack_big.o uint16_read.o uint16_read_big.o uint16
 OPEN_OBJS=open_append.o open_excl.o open_read.o open_rw.o open_trunc.o open_write.o openreadclose.o readclose.o 
 STRALLOC_OBJS=stralloc_append.o stralloc_cat.o stralloc_catb.o stralloc_catlong0.o stralloc_catm_internal.o stralloc_cats.o stralloc_catulong0.o stralloc_chomp.o stralloc_chop.o stralloc_copy.o stralloc_copyb.o stralloc_copys.o stralloc_diff.o stralloc_diffs.o stralloc_free.o stralloc_init.o stralloc_ready.o stralloc_readyplus.o stralloc_starts.o stralloc_zero.o 
 UNIX_OBJS=iopause.o ndelay_off.o ndelay_on.o winsock2errno.o 
-SOCKET_OBJS=fmt_ip4.o fmt_ip6.o fmt_ip6_flat.o fmt_ip6c.o fmt_ip6if.o fmt_ip6ifc.o init.o scan_ip4.o scan_ip6.o scan_ip6_flat.o scan_ip6if.o socket_accept4.o socket_accept6.o socket_bind4.o socket_bind4_reuse.o socket_bind6.o socket_bind6_reuse.o socket_broadcast.o socket_connect4.o socket_connect6.o socket_connected.o socket_deferaccept.o socket_getifidx.o socket_getifname.o socket_ip4loopback.o socket_listen.o socket_local4.o socket_local6.o socket_mchopcount6.o socket_mcjoin4.o socket_mcjoin6.o socket_mcleave4.o socket_mcleave6.o socket_mcloop4.o socket_mcloop6.o socket_mcttl4.o socket_noipv6.o socket_recv4.o socket_recv6.o socket_remote4.o socket_remote6.o socket_sctp4.o socket_sctp4b.o socket_sctp6.o socket_sctp6b.o socket_send4.o socket_send6.o socket_tcp4.o socket_tcp4b.o socket_tcp6.o socket_tcp6b.o socket_tryreservein.o socket_udp4.o socket_udp6.o socket_v4mappedprefix.o socket_v6any.o socket_v6loopback.o 
+SOCKET_OBJS=fmt_ip4.o fmt_ip6.o fmt_ip6_flat.o fmt_ip6c.o fmt_ip6if.o fmt_ip6ifc.o init.o scan_ip4.o scan_ip6.o scan_ip6_flat.o scan_ip6if.o socket_accept4.o socket_accept6.o socket_bind4.o socket_bind4_reuse.o socket_bind6.o socket_bind6_reuse.o socket_broadcast.o socket_connect4.o socket_connect6.o socket_connected.o socket_deferaccept.o socket_fastopen.o socket_fastopen_connect4.o socket_fastopen_connect6.o socket_getifidx.o socket_getifname.o socket_ip4loopback.o socket_listen.o socket_local4.o socket_local6.o socket_mchopcount6.o socket_mcjoin4.o socket_mcjoin6.o socket_mcleave4.o socket_mcleave6.o socket_mcloop4.o socket_mcloop6.o socket_mcttl4.o socket_noipv6.o socket_quickack.o socket_recv4.o socket_recv6.o socket_remote4.o socket_remote6.o socket_sctp4.o socket_sctp4b.o socket_sctp6.o socket_sctp6b.o socket_send4.o socket_send6.o socket_tcp4.o socket_tcp4b.o socket_tcp6.o socket_tcp6b.o socket_tryreservein.o socket_udp4.o socket_udp6.o socket_v4mappedprefix.o socket_v6any.o socket_v6loopback.o 
 BUFFER_OBJS=buffer_0.o buffer_0small.o buffer_1.o buffer_1small.o buffer_2.o buffer_close.o buffer_feed.o buffer_flush.o buffer_free.o buffer_fromarray.o buffer_frombuf.o buffer_fromsa.o buffer_get.o buffer_get_new_token_sa.o buffer_get_new_token_sa_pred.o buffer_get_token.o buffer_get_token_pred.o buffer_get_token_sa.o buffer_get_token_sa_pred.o buffer_getc.o buffer_getline.o buffer_getline_sa.o buffer_getn.o buffer_getnewline_sa.o buffer_init.o buffer_init_free.o buffer_mmapread.o buffer_munmap.o buffer_peek.o buffer_put.o buffer_put8long.o buffer_putalign.o buffer_puterror.o buffer_puterror2.o buffer_putflush.o buffer_putlong.o buffer_putlonglong.o buffer_putm_internal.o buffer_putm_internal_flush.o buffer_putnlflush.o buffer_puts.o buffer_putsa.o buffer_putsaflush.o buffer_putsalign.o buffer_putsflush.o buffer_putspace.o buffer_putulong.o buffer_putulonglong.o buffer_putxlong.o buffer_seek.o buffer_stubborn.o buffer_stubborn2.o buffer_tosa.o errmsg_iam.o errmsg_info.o errmsg_infosys.o errmsg_puts.o errmsg_warn.o errmsg_warnsys.o errmsg_write.o 
 MMAP_OBJS=mmap_private.o mmap_read.o mmap_shared.o mmap_unmap.o 
 TAIA_OBJS=taia_add.o taia_addsec.o taia_approx.o taia_frac.o taia_half.o taia_less.o taia_now.o taia_pack.o taia_sub.o taia_tai.o taia_uint.o taia_unpack.o 
@@ -669,10 +670,11 @@ TAI_OBJS=tai_add.o tai_now.o tai_pack.o tai_sub.o tai_uint.o tai_unpack.o
 DNS_OBJS=dns_dfd.o dns_domain.o dns_dtda.o dns_ip.o dns_ip6.o dns_ipq.o dns_ipq6.o dns_mx.o dns_name.o dns_nd.o dns_nd6.o dns_packet.o dns_random.o dns_rcip.o dns_rcrw.o dns_resolve.o dns_sortip.o dns_sortip6.o dns_transmit.o dns_txt.o 
 CASE_OBJS=case_diffb.o case_diffs.o case_lowerb.o case_lowers.o case_starts.o 
 MULT_OBJS=imult16.o imult32.o imult64.o range_arrayinbuf.o range_str2inbuf.o range_str4inbuf.o range_strinbuf.o umult16.o umult32.o umult64.o 
-ARRAY_OBJS=array_allocate.o array_bytes.o array_cat.o array_cat0.o array_catb.o array_cate.o array_cats.o array_cats0.o array_equal.o array_fail.o array_get.o array_length.o array_reset.o array_start.o array_trunc.o array_truncate.o iarray_allocate.o iarray_free.o iarray_get.o iarray_init.o 
-IO_OBJS=io_appendfile.o io_block.o io_canread.o io_canwrite.o io_check.o io_close.o io_closeonexec.o io_createfile.o io_dontwantread.o io_dontwantwrite.o io_eagain.o io_fd.o io_finishandshutdown.o io_getcookie.o io_mmapwritefile.o io_nonblock.o io_passfd.o io_pipe.o io_readfile.o io_readwritefile.o io_receivefd.o io_sendfile.o io_setcookie.o io_sigpipe.o io_socketpair.o io_timeout.o io_timeouted.o io_tryread.o io_tryreadtimeout.o io_trywrite.o io_trywritetimeout.o io_wait.o io_waitread.o io_waituntil.o io_waituntil2.o io_waitwrite.o io_wantread.o io_wantwrite.o iob_addbuf.o iob_addbuf_free.o iob_addbuf_internal.o iob_addbuf_munmap.o iob_addfile.o iob_addfile_close.o iob_adds.o iob_adds_free.o iob_bytesleft.o iob_free.o iob_new.o iob_prefetch.o iob_reset.o iob_send.o iob_write.o 
-TEXTCODE_OBJS=base64.o fmt_base64.o fmt_cescape.o fmt_foldwhitespace.o fmt_hexdump.o fmt_html.o fmt_jsonescape.o fmt_ldapescape.o fmt_ldapescape2.o fmt_quotedprintable.o fmt_to_array.o fmt_to_sa.o fmt_tofrom_array.o fmt_urlencoded.o fmt_uuencoded.o fmt_yenc.o scan_base64.o scan_cescape.o scan_hexdump.o scan_html.o scan_jsonescape.o scan_ldapescape.o scan_quotedprintable.o scan_to_array.o scan_to_sa.o scan_tofrom_array.o scan_urlencoded.o scan_uuencoded.o scan_yenc.o 
+ARRAY_OBJS=array_allocate.o array_bytes.o array_cat.o array_cat0.o array_catb.o array_cate.o array_cats.o array_cats0.o array_equal.o array_fail.o array_get.o array_length.o array_reset.o array_start.o array_trunc.o array_truncate.o iarray_allocate.o iarray_free.o iarray_get.o iarray_init.o iarray_length.o 
+IO_OBJS=io_appendfile.o io_block.o io_canread.o io_canwrite.o io_check.o io_close.o io_closeonexec.o io_createfile.o io_debugstring.o io_dontwantread.o io_dontwantwrite.o io_eagain.o io_eagain_read.o io_eagain_write.o io_fd.o io_finishandshutdown.o io_getcookie.o io_mmapwritefile.o io_nonblock.o io_passfd.o io_pipe.o io_readfile.o io_readwritefile.o io_receivefd.o io_sendfile.o io_setcookie.o io_sigpipe.o io_socketpair.o io_timedout.o io_timeout.o io_timeouted.o io_tryread.o io_tryreadtimeout.o io_trywrite.o io_trywritetimeout.o io_wait.o io_waitread.o io_waituntil.o io_waituntil2.o io_waitwrite.o io_wantread.o io_wantwrite.o iob_addbuf.o iob_addbuf_free.o iob_addbuf_internal.o iob_addbuf_munmap.o iob_addfile.o iob_addfile_close.o iob_adds.o iob_adds_free.o iob_bytesleft.o iob_free.o iob_new.o iob_prefetch.o iob_reset.o iob_send.o iob_write.o 
+TEXTCODE_OBJS=base64.o fmt_base64.o fmt_cescape.o fmt_foldwhitespace.o fmt_hexdump.o fmt_html.o fmt_html_tagarg.o fmt_jsonescape.o fmt_ldapescape.o fmt_ldapescape2.o fmt_quotedprintable.o fmt_to_array.o fmt_to_sa.o fmt_tofrom_array.o fmt_urlencoded.o fmt_uuencoded.o fmt_xml.o fmt_yenc.o scan_base64.o scan_cescape.o scan_hexdump.o scan_html.o scan_jsonescape.o scan_ldapescape.o scan_quotedprintable.o scan_to_array.o scan_to_sa.o scan_tofrom_array.o scan_urlencoded.o scan_uuencoded.o scan_yenc.o 
 CDB_OBJS=cdb.o cdb_hash.o cdb_make.o cdb_traverse.o 
+CRITBIT_OBJS=critbit.o 
 
 byte.a: $(BYTE_OBJS)
 fmt.a: $(FMT_OBJS)
@@ -694,12 +696,13 @@ array.a: $(ARRAY_OBJS)
 mult.a: $(MULT_OBJS)
 io.a: $(IO_OBJS)
 cdb.a: $(CDB_OBJS)
+critbit.a: $(CRITBIT_OBJS)
 
 ALL_OBJS=$(DNS_OBJS) $(BYTE_OBJS) $(FMT_OBJS) $(SCAN_OBJS) \
 $(STR_OBJS) $(UINT_OBJS) $(OPEN_OBJS) $(STRALLOC_OBJS) $(UNIX_OBJS) \
 $(SOCKET_OBJS) $(BUFFER_OBJS) $(MMAP_OBJS) $(TEXTCODE_OBJS) \
 $(TAIA_OBJS) $(TAI_OBJS) $(CASE_OBJS) $(ARRAY_OBJS) $(MULT_OBJS) \
-$(IO_OBJS) $(CDB_OBJS)
+$(IO_OBJS) $(CDB_OBJS) $(CRITBIT_OBJS)
 
 libowfat.a: $(ALL_OBJS)
 	$(CROSS)ar cru $@ $(ALL_OBJS)
@@ -734,7 +737,7 @@ INCLUDES=buffer.h byte.h fmt.h ip4.h ip6.h mmap.h scan.h socket.h str.h stralloc
 uint16.h uint32.h uint64.h open.h textcode.h tai.h taia.h dns.h iopause.h case.h \
 openreadclose.h readclose.h ndelay.h array.h io.h safemult.h iob.h havealloca.h \
 errmsg.h cdb.h cdb_make.h rangecheck.h iarray.h va_narg.h isset.h \
-compiletimeassert.h
+compiletimeassert.h critbit.h
 
 install-inc:
 	install -d $(INCLUDEDIR)
@@ -755,8 +758,8 @@ uninstall:
 	rm -f $(patsubst %.3,$(MAN3DIR)/%.3,$(notdir $(wildcard */*.3)))
 	rm -f $(LIBDIR)/libowfat.a
 
-VERSION=libowfat-0.30
-CURNAME=libowfat-0.30
+VERSION=libowfat-0.31
+CURNAME=libowfat-0.31
 
 tar: clean rename
 	rm -f dep libdep
@@ -859,7 +862,7 @@ libsocket: trysocket.c
 socket_accept6.o socket_bind6.o socket_connect6.o socket_local6.o \
 socket_mchopcount6.o socket_mcjoin6.o socket_mcleave6.o socket_mcloop6.o \
 socket_recv6.o socket_remote6.o socket_sctp6b.o socket_send6.o \
-socket_tcp6b.o socket_udp6.o: haveip6.h
+socket_tcp6b.o socket_tcp6.o socket_udp6.o: haveip6.h
 
 socket_accept6.o socket_connect6.o socket_local6.o socket_recv6.o \
 socket_remote6.o socket_send6.o: havescope.h
diff --git a/array/iarray_allocate.c b/array/iarray_allocate.c
index 2dd58f3..e2d85a6 100644
--- a/array/iarray_allocate.c
+++ b/array/iarray_allocate.c
@@ -1,8 +1,10 @@
 #include "likely.h"
 #include <stdlib.h>
+#ifndef __MINGW32__
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <unistd.h>
+#endif
 #include "iarray.h"
 #ifdef __dietlibc__
 #include <sys/atomic.h>
@@ -13,10 +15,11 @@
 static iarray_page* new_page(size_t pagesize) {
 #ifdef __MINGW32__
   void* x=malloc(pagesize);
+  if (x==0) return 0;
 #else
   void* x=mmap(0,pagesize,PROT_READ|PROT_WRITE,MAP_ANONYMOUS|MAP_PRIVATE,-1,0);
-#endif
   if (x==MAP_FAILED) return 0;
+#endif
   return (iarray_page*)x;
 }
 
diff --git a/buffer.h b/buffer.h
index e3dca0b..54bed5c 100644
--- a/buffer.h
+++ b/buffer.h
@@ -6,6 +6,8 @@
 #include <stddef.h>
 /* for ssize_t: */
 #include <sys/types.h>
+/* for strlen */
+#include <string.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -47,8 +49,8 @@ int buffer_putsflush(buffer* b,const char* x);
 /* as a little gcc-specific hack, if somebody calls buffer_puts with a
  * constant string, where we know its length at compile-time, call
  * buffer_put with the known length instead */
-#define buffer_puts(b,s) (__builtin_constant_p(s) ? buffer_put(b,s,sizeof(s)-1) : buffer_puts(b,s))
-#define buffer_putsflush(b,s) (__builtin_constant_p(s) ? buffer_putflush(b,s,sizeof(s)-1) : buffer_putsflush(b,s))
+#define buffer_puts(b,s) (__builtin_constant_p(s) ? buffer_put(b,s,strlen(s)) : buffer_puts(b,s))
+#define buffer_putsflush(b,s) (__builtin_constant_p(s) ? buffer_putflush(b,s,strlen(s)) : buffer_putsflush(b,s))
 #endif
 
 int buffer_putm_internal(buffer*b,...);
diff --git a/buffer/buffer_put.c b/buffer/buffer_put.c
index ec43b57..d090b88 100644
--- a/buffer/buffer_put.c
+++ b/buffer/buffer_put.c
@@ -1,17 +1,28 @@
-#include "byte.h"
+#include <string.h>
 #include "buffer.h"
+#ifdef __x86_64__
+#include <x86intrin.h>
+#endif
 
 extern int buffer_stubborn(ssize_t (*op)(),int fd,const char* buf, size_t len,void* cookie);
 
+#ifndef __unlikely
+#ifdef __GNUC__
+#define __unlikely(x) __builtin_expect((x),0)
+#else
+#define __unlikely(x) (x)
+#endif
+#endif
+
 int buffer_put(buffer* b,const char* buf,size_t len) {
-  if (len>b->a-b->p) {	/* doesn't fit */
+  if (__unlikely(len>b->a-b->p)) {	/* doesn't fit */
     if (buffer_flush(b)==-1) return -1;
     if (len>b->a) {
       if (buffer_stubborn(b->op,b->fd,buf,len,b)<0) return -1;
       return 0;
     }
   }
-  byte_copy(b->x+b->p, len, buf);
+  memcpy(b->x+b->p, buf, len);
   b->p+=len;
   return 0;
 }
diff --git a/socket/socket_fastopen.c b/socket/socket_fastopen.c
index 3363c2c..5c877b3 100644
--- a/socket/socket_fastopen.c
+++ b/socket/socket_fastopen.c
@@ -1,7 +1,9 @@
 #include "socket.h"
+#ifndef __MINGW32__
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/tcp.h>
+#endif
 #include <errno.h>
 
 int socket_fastopen(int s) {
diff --git a/socket/socket_fastopen_connect4.c b/socket/socket_fastopen_connect4.c
index 621f58c..188c0b3 100644
--- a/socket/socket_fastopen_connect4.c
+++ b/socket/socket_fastopen_connect4.c
@@ -1,7 +1,11 @@
 #include "socket.h"
+#ifdef __MINGW32__
+#include <windows.h>
+#else
 #include <sys/types.h>
 #include <unistd.h>
 #include <sys/socket.h>
+#endif
 #include <errno.h>
 
 ssize_t socket_fastopen_connect4(int s,const char* ip,uint16 port,const char* buf,size_t len) {
diff --git a/socket/socket_fastopen_connect6.c b/socket/socket_fastopen_connect6.c
index 32d0340..33ae21f 100644
--- a/socket/socket_fastopen_connect6.c
+++ b/socket/socket_fastopen_connect6.c
@@ -1,7 +1,11 @@
 #include "socket.h"
+#ifdef __MINGW32__
+#include <windows.h>
+#else
 #include <sys/types.h>
-#include <sys/socket.h>
 #include <unistd.h>
+#include <sys/socket.h>
+#endif
 #include <errno.h>
 
 ssize_t socket_fastopen_connect6(int s,const char* ip,uint16 port,uint32_t scope_id,const char* buf,size_t len) {
diff --git a/socket/socket_quickack.c b/socket/socket_quickack.c
index cd027f8..3dc1766 100644
--- a/socket/socket_quickack.c
+++ b/socket/socket_quickack.c
@@ -1,7 +1,9 @@
 #include "socket.h"
+#ifndef __MINGW32__
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/tcp.h>
+#endif
 #include <errno.h>
 
 int socket_quickack(int s,int value) {
diff --git a/socket/socket_tcp6.c b/socket/socket_tcp6.c
index 1e6689c..a7c1975 100644
--- a/socket/socket_tcp6.c
+++ b/socket/socket_tcp6.c
@@ -9,10 +9,21 @@
 #include "socket.h"
 #include "ndelay.h"
 
+#ifndef EAFNOSUPPORT
+#define EAFNOSUPPORT EINVAL
+#endif
+#ifndef EPFNOSUPPORT
+#define EPFNOSUPPORT EAFNOSUPPORT
+#endif
+#ifndef EPROTONOSUPPORT
+#define EPROTONOSUPPORT EAFNOSUPPORT
+#endif
+
 int socket_tcp6(void) {
   int s;
 #if defined(LIBC_HAS_IP6) && defined(SOCK_NONBLOCK)
-  if ((s=socket(noipv6?PF_INET:PF_INET6,SOCK_STREAM|SOCK_NONBLOCK,IPPROTO_TCP))>-1 || errno!=EINVAL) return s;
+  if ((s=socket(noipv6?PF_INET:PF_INET6,SOCK_STREAM|SOCK_NONBLOCK,IPPROTO_TCP))>-1 ||
+      (errno!=EINVAL && errno!=EAFNOSUPPORT && errno!=EPFNOSUPPORT && errno!=EPROTONOSUPPORT)) return s;
 #endif
   s=socket_tcp6b();
   if (s==-1) return -1;