Portability: POSIXize some of inet's error codes

include/errno.h

@@ -79,12 +79,12 @@ extern int errno;		  /* place where the error numbers go */
 
 /* The following errors relate to networking. */
 #define EPACKSIZE     (_SIGN 50)  /* invalid packet size for some protocol */
-#define EOUTOFBUFS    (_SIGN 51)  /* not enough buffers left */
+#define ENOBUFS       (_SIGN 51)  /* not enough buffers left */
 #define EBADIOCTL     (_SIGN 52)  /* illegal ioctl for device */
 #define EBADMODE      (_SIGN 53)  /* badmode in ioctl */
 #define EWOULDBLOCK   (_SIGN 54)  /* call would block on nonblocking socket */
-#define EBADDEST      (_SIGN 55)  /* not a valid destination address */
+#define ENETUNREACH   (_SIGN 55)  /* network unreachable */
-#define EDSTNOTRCH    (_SIGN 56)  /* destination not reachable */
+#define EHOSTUNREACH  (_SIGN 56)  /* host unreachable */
 #define EISCONN	      (_SIGN 57)  /* already connected */
 #define EADDRINUSE    (_SIGN 58)  /* address in use */
 #define ECONNREFUSED  (_SIGN 59)  /* connection refused */
@@ -105,6 +105,7 @@ extern int errno;		  /* place where the error numbers go */
 #define ENOTSOCK      (_SIGN 74)  /* Socket operation on non-socket */
 #define ENOPROTOOPT   (_SIGN 75)  /* Protocol not available */
 #define EOPNOTSUPP    (_SIGN 76)  /* Operation not supported */
+#define ENETDOWN      (_SIGN 77)  /* network is down */
 
 /* The following are not POSIX errors, but they can still happen. 
  * All of these are generated by the kernel and relate to message passing.

lib/ansi/errlist.c

@@ -52,7 +52,7 @@ const char *_sys_errlist[] = {
 	"Too many levels of symbolic links",	/* ELOOP */
 	"Driver restarted",		/* ERESTART */
 	unknown,			/* 42 */
-	unknown,			/* 43 */
+	"Identifier removed",		/* EIDRM */
 	unknown,			/* 44 */
 	unknown,			/* 45 */
 	unknown,			/* 46 */
@@ -60,12 +60,12 @@ const char *_sys_errlist[] = {
 	unknown,			/* 48 */
 	unknown,			/* 49 */
 	"Invalid packet size",		/* EPACKSIZE */
-	"Not enough buffers left",	/* EOUTOFBUFS */
+	"Not enough buffers left",	/* ENOBUFS */
 	"Illegal ioctl for device",	/* EBADIOCTL */
 	"Bad mode for ioctl",		/* EBADMODE */
 	"Would block",			/* EWOULDBLOCK */
-	"Bad destination address",	/* EBADDEST */
+	"Network unreachable",		/* ENETUNREACH */
-	"Destination not reachable",	/* EDSTNOTRCH */
+	"Host unreachable",		/* EHOSTUNREACH */
 	"Already connected",		/* EISCONN */
 	"Address in use",		/* EADDRINUSE */
 	"Connection refused",		/* ECONNREFUSED */
@@ -86,6 +86,7 @@ const char *_sys_errlist[] = {
 	"Socket operation on non-socket", /* ENOTSOCK */
 	"Protocol not available",	/* ENOPROTOOPT */
 	"Operation not supported",	/* EOPNOTSUPP */
+	"Network is down",		/* ENETDOWN */
 };
 
 const int _sys_nerr = sizeof(_sys_errlist) / sizeof(_sys_errlist[0]);

man/man2/intro.2

@@ -32,7 +32,7 @@ variable \fBerrno\fP, which is not cleared
 on successful calls.
 Thus \fBerrno\fP should be tested only after an error has occurred.
 .PP
-The following is a complete list of the errors and their
+The following is a list of the errors and their
 names as given in
 .RI < sys/errno.h >:
 .en 0 OK "Error 0
@@ -228,16 +228,16 @@ system.
 A directory with entries other than \*(lq.\*(rq and \*(lq..\*(rq
 was supplied to a remove directory or rename call.
 .en 40 ELOOP "Too many symbolic links"
-A path name lookup involved more than SYMLOOP symbolic links.  SYMLOOP
+A path name lookup involved too many symbolic links.
-equals 8 as distributed.
+.en 41 ERESTART "Device driver restarted
-(Minix-vmd)
+.en 43 EIDRM "Identifier removed
 .en 50 EPACKSIZE "Invalid packet size
-.en 51 EOUTOFBUFS "Not enough buffers left
+.en 51 ENOBUFS "Not enough buffers left
 .en 52 EBADIOCTL "Illegal ioctl for device
 .en 53 EBADMODE "Bad mode in ioctl
 .en 54 EWOULDBLOCK "Would block
-.en 55 EBADDEST "Bad destination address
+.en 55 ENETUNREACH "Network unreachable
-.en 56 EDSTNOTRCH "Destination not reachable
+.en 56 EHOSTUNREACH "Host unreachable
 .en 57 EISCONN "Already connected
 .en 58 EADDRINUSE "Address in use
 .en 59 ECONNREFUSED "Connection refused
@@ -248,8 +248,17 @@ equals 8 as distributed.
 .en 64 ENOTCONN "No connection
 .en 65 ESHUTDOWN "Already shutdown
 .en 66 ENOCONN "No such connection
-.en 67 EINPROGRESS "Operation now in progress
+.en 67 EAFNOSUPPORT "Address family not supported
-.en 68 EALREADY "Operation already in progress
+.en 68 EPROTONOSUPPORT "Protocol not supported by AF
+.en 69 EPROTOTYPE "Protocol wrong type for socket
+.en 70 EINPROGRESS "Operation now in progress
+.en 71 EADDRNOTAVAIL "Can't assign requested address
+.en 72 EALREADY "Operation already in progress
+.en 73 EMSGSIZE "Message too long
+.en 74 ENOTSOCK "Socket operation on non-socket
+.en 75 ENOPROTOOPT "Protocol not available
+.en 76 EOPNOTSUPP "Operation not supported
+.en 77 ENETDOWN "Network is down
 .ig
 .en XXX EDQUOT "Disc quota exceeded"
 A 

man/man4/ip.4

@@ -1414,11 +1414,11 @@ variable if the
 .BR write ,
 or
 .B ioctl
-call returns -1.  The TCP/IP error codes defined in <errno.h> are:
+call returns -1.  The TCP/IP error codes defined in <errno.h> are, among others:
 .IP EPACKSIZE 5c
 This indicates an attempt to read or write with a buffer that is too
 large or too small.
-.IP EOUTOFBUFS
+.IP ENOBUFS
 The TCP/IP server has insufficient memory to execute the request.
 .IP EBADIOCTL
 This indicates an attempt to execute a command the particular server
@@ -1429,10 +1429,10 @@ on an ETH channel.
 .IP EBADMODE
 The request is refused because the channel is not fully configured, in the
 wrong state or the parameters are invalid.
-.IP EBADDEST
+.IP ENETUNREACH
-This indicates an illegal destination address for a packet.
+The destination network is not reachable.
-.IP EDSTNORCH
+.IP EHOSTUNREACH
-The destination is not reachable.
+The destination host is not reachable.
 .IP EISCONN
 The channel is already connected so a second request is refused.
 .IP EADDRINUSE

servers/inet/generic/arp.c

@@ -920,7 +920,7 @@ ether_addr_t *ethaddr;
 			return NW_OK;
 		}
 		if (ce->ac_state == ACS_UNREACHABLE)
-			return EDSTNOTRCH;
+			return EHOSTUNREACH;
 		assert(ce->ac_state == ACS_INCOMPLETE);
 
 		return NW_SUSPEND;

servers/inet/generic/ip_eth.c

@@ -346,10 +346,10 @@ int type;
 			ip_port->ip_dl.dl_eth.de_arp_tail= eth_pack;
 			return NW_OK;
 		}
-		if (r == EDSTNOTRCH)
+		if (r == EHOSTUNREACH)
 		{
 			bf_afree(eth_pack);
-			return EDSTNOTRCH;
+			return r;
 		}
 		assert(r == NW_OK);
 	}
@@ -599,7 +599,7 @@ ether_addr_t *eth_addr;
 		/* Dequeue the packet */
 		ip_port->ip_dl.dl_eth.de_arp_head= eth_pack->acc_ext_link;
 
-		if (r == EDSTNOTRCH)
+		if (r == EHOSTUNREACH)
 		{
 			bf_afree(eth_pack);
 			continue;

servers/inet/generic/ip_ioctl.c

@@ -299,7 +299,7 @@ ioreq_t req;
 		{
 			/* Interface is down, no changes allowed */
 			return (*ip_fd->if_put_userdata)(ip_fd->if_srfd,
-				EINVAL, NULL, TRUE);
+				ENETDOWN, NULL, TRUE);
 		}
 
 		data= bf_packIffLess (data, sizeof(nwio_route_t) );
@@ -375,7 +375,7 @@ ioreq_t req;
 		{
 			/* Interface is down, no changes allowed */
 			return (*ip_fd->if_put_userdata)(ip_fd->if_srfd,
-				EINVAL, NULL, TRUE);
+				ENETDOWN, NULL, TRUE);
 		}
 
 		data= bf_packIffLess (data, sizeof(nwio_route_t) );

servers/inet/generic/ip_read.c

@@ -822,7 +822,7 @@ ev_arg_t ev_arg;
 				r= next_port->ip_dev_send(next_port,
 					iroute->irt_gateway,
 					pack, IP_LT_NORMAL);
-				if (r == EDSTNOTRCH)
+				if (r == EHOSTUNREACH)
 				{
 					printf("ip[%d]: gw ",
 						ip_port-ip_port_table);
@@ -894,7 +894,7 @@ ev_arg_t ev_arg;
 			/* Just send the packet to it's destination */
 			pack->acc_linkC++; /* Extra ref for ICMP */
 			r= next_port->ip_dev_send(next_port, dest, pack, type);
-			if (r == EDSTNOTRCH)
+			if (r == EHOSTUNREACH)
 			{
 				DBLOCK(1, printf("ip[%d]: next hop ",
 					ip_port-ip_port_table);

servers/inet/generic/ip_write.c

@@ -78,11 +78,9 @@ size_t data_len;
 
 	if (!(ip_fd->if_port->ip_flags & IPF_IPADDRSET))
 	{
-		/* Interface is down. What kind of error do we want? For
+		/* Interface is down. */
-		 * the moment, we return OK.
-		 */
 		bf_afree(data);
-		return NW_OK;
+		return ENETDOWN;
 	}
 
 	data_len= bf_bufsize(data);
@@ -198,17 +196,17 @@ size_t data_len;
 	else if ((hostrep_dst & 0xe0000000l) == 0xe0000000l)
 		;	/* OK, Multicast */
 	else if ((hostrep_dst & 0xf0000000l) == 0xf0000000l)
-		r= EBADDEST;	/* Bad class */
+		r= EAFNOSUPPORT;	/* Bad class */
 	else if ((dstaddr ^ my_ipaddr) & netmask)
 		;	/* OK, remote destination */
 	else if (!(dstaddr & ~netmask) &&
 		(ip_port->ip_flags & IPF_SUBNET_BCAST))
 	{
-		r= EBADDEST;	/* Zero host part */
+		r= EAFNOSUPPORT;	/* Zero host part */
 	}
 	if (r<0)
 	{
-		DIFBLOCK(1, r == EBADDEST,
+		DIFBLOCK(1, r == EAFNOSUPPORT,
 			printf("bad destination: ");
 			writeIpAddr(ip_hdr->ih_dst);
 			printf("\n"));

servers/inet/generic/ipr.c

@@ -195,7 +195,7 @@ ipaddr_t *nexthop;
 
 	oroute= oroute_find_ent(port_nr, dest);
 	if (!oroute || oroute->ort_dist > ttl)
-		return EDSTNOTRCH;
+		return ENETUNREACH;
 	if (msgsize && oroute->ort_mtu && 
 		oroute->ort_mtu < msgsize)
 	{

servers/inet/generic/tcp.c

@@ -392,12 +392,14 @@ assert (count == sizeof(struct nwio_ipopt));
 			result= (int)offset;
 			if (result<0)
 			{
-				if (result == EDSTNOTRCH)
+				if (result == EHOSTUNREACH ||
+					result == ENETUNREACH ||
+					result == ENETDOWN)
 				{
 					if (tcp_port->tp_snd_head)
 					{
 						tcp_notreach(tcp_port->
-							tp_snd_head);
+							tp_snd_head, result);
 					}
 				}
 				else
@@ -2414,7 +2416,7 @@ int priority;
 			{
 				continue;
 			}
-			tcp_close_connection (tcp_conn, EOUTOFBUFS);
+			tcp_close_connection (tcp_conn, ENOBUFS);
 		}
 	}
 
@@ -2434,7 +2436,7 @@ int priority;
 			{
 				continue;
 			}
-			tcp_close_connection (tcp_conn, EOUTOFBUFS);
+			tcp_close_connection (tcp_conn, ENOBUFS);
 		}
 	}
 }
@@ -2470,8 +2472,9 @@ PRIVATE void tcp_bufcheck()
 }
 #endif
 
-PUBLIC void tcp_notreach(tcp_conn)
+PUBLIC void tcp_notreach(tcp_conn, error)
 tcp_conn_t *tcp_conn;
+int error;
 {
 	int new_ttl;
 
@@ -2479,7 +2482,7 @@ tcp_conn_t *tcp_conn;
 	if (new_ttl == IP_MAX_TTL)
 	{
 		if (tcp_conn->tc_state == TCS_SYN_SENT)
-			tcp_close_connection(tcp_conn, EDSTNOTRCH);
+			tcp_close_connection(tcp_conn, error);
 		return;
 	}
 	else if (new_ttl < TCP_DEF_TTL_NEXT)

servers/inet/generic/tcp_int.h

@@ -243,7 +243,7 @@ int tcp_su4listen ARGS(( tcp_fd_t *tcp_fd, tcp_conn_t *tcp_conn,
 void tcp_reply_ioctl ARGS(( tcp_fd_t *tcp_fd, int reply ));
 void tcp_reply_write ARGS(( tcp_fd_t *tcp_fd, size_t reply ));
 void tcp_reply_read ARGS(( tcp_fd_t *tcp_fd, size_t reply ));
-void tcp_notreach ARGS(( tcp_conn_t *tcp_conn ));
+void tcp_notreach ARGS(( tcp_conn_t *tcp_conn, int error ));
 void tcp_mtu_exceeded ARGS(( tcp_conn_t *tcp_conn ));
 void tcp_mtu_incr ARGS(( tcp_conn_t *tcp_conn ));
 

servers/inet/generic/tcp_send.c

@@ -121,12 +121,13 @@ tcp_port_t *tcp_port;
 					tcp_mtu_exceeded(tcp_conn);
 					continue;
 				}
-				if (r == EDSTNOTRCH)
+				if (r == EHOSTUNREACH || r == ENETUNREACH ||
+					r == ENETDOWN)
 				{
-					tcp_notreach(tcp_conn);
+					tcp_notreach(tcp_conn, r);
 					continue;
 				}
-				if (r == EBADDEST)
+				if (r == EAFNOSUPPORT)
 					continue;
 			}
 			assert(r == NW_OK ||