that _should_ be just enough to implement TUN on Solaris 2.x

sadly this is ineligble for upstream because we don't bother
to use TAP in the slightest

include/tuntap.h

@@ -147,6 +147,10 @@ extern "C"
     char if_name[IF_NAMESIZE];
 #if defined(FreeBSD)
     int mode;
+#endif
+#if defined(__sun)
+    int ip_fd;
+    char internal_name[IF_NAMESIZE];
 #endif
   };
 

vendor/libtuntap-master/tuntap-unix-bsd.c

@@ -47,5 +47,4 @@ tuntap_sys_set_ifname(struct device *dev, const char *ifname, size_t len)
    */
   return -1;
 }
-
 #endif

vendor/libtuntap-master/tuntap-unix-sunos.c

@@ -20,6 +20,7 @@
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
+#include <sys/sockio.h>
 
 #include <arpa/inet.h>
 #include <net/if.h>
@@ -27,13 +28,22 @@
 #include <net/if_types.h>
 #include <netinet/if_ether.h>
 #include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
 
 #include <fcntl.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
+#include <stropts.h>
 #include <unistd.h>
+#include <ctype.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <alloca.h>
 
 #include "tuntap.h"
 
@@ -42,50 +52,270 @@
 static int
 tuntap_sys_create_dev(struct device *dev, int tun)
 {
-  return -1;
+	int if_fd, ip_muxid, ppa = -1;
+	struct lifreq lifr;
+	struct ifreq ifr;
+	const char *ptr = NULL;
+	struct strioctl strioc_ppa;
+
+	/* improved generic TUN/TAP driver from
+	 * http://www.whiteboard.ne.jp/~admin2/tuntap/
+	 * has IPv6 support. Most open-source variants of
+	 * Solaris already have this driver in their package
+	 * repos, Oracle Solaris users need to compile/load
+	 * manually.
+	 */
+
+	explicit_bzero(&lifr, sizeof lifr);
+
+	if ((dev->ip_fd = open("/dev/udp", O_RDWR, 0)) < 0)
+	{
+		tuntap_log(TUNTAP_LOG_ERR, "Can't open /dev/udp");
+		return -1;
+	}
+
+	if ((dev->tun_fd = open("/dev/tun", O_RDWR, 0)) < 0)
+	{
+		tuntap_log(TUNTAP_LOG_ERR, "Can't open /dev/tun");
+		return -1;
+	}
+
+	/* get unit number */
+	if (*dev->if_name)
+	{
+		ptr = dev->if_name;
+		while (*ptr && !isdigit((int) *ptr))
+		{
+			ptr++;
+		}
+		ppa = atoi(ptr);
+	}
+
+	/* Assign a new PPA and get its unit number. */
+	strioc_ppa.ic_cmd = TUNNEWPPA;
+	strioc_ppa.ic_timout = 0;
+	strioc_ppa.ic_len = sizeof(ppa);
+	strioc_ppa.ic_dp = (char *)&ppa;
+
+	if (*ptr == '\0')           /* no number given, try dynamic */
+	{
+		bool found_one = false;
+		while (!found_one && ppa < 64)
+		{
+			int new_ppa = ioctl(dev->tun_fd, I_STR, &strioc_ppa);
+			if (new_ppa >= 0)
+			{
+				char* msg = alloca(512);
+				sprintf(msg, "got dynamic interface tun%i", new_ppa);
+				tuntap_log( TUNTAP_LOG_INFO, msg );
+				ppa = new_ppa;
+				found_one = true;
+				break;
+			}
+			if (errno != EEXIST)
+			{
+				tuntap_log(TUNTAP_LOG_ERR, "unexpected error trying to find free tun interface");
+				return -1;
+			}
+			ppa++;
+		}
+		if (!found_one)
+		{
+			tuntap_log(TUNTAP_LOG_ERR, "could not find free tun interface, give up.");
+			return -1;
+		}
+	}
+	else                        /* try this particular one */
+	{
+		if ((ppa = ioctl(dev->tun_fd, I_STR, &strioc_ppa)) < 0)
+		{
+			char *msg = alloca(512);
+			sprintf(msg, "Can't assign PPA for new interface (tun%i)", ppa);
+			tuntap_log(TUNTAP_LOG_ERR, msg);
+			return -1;
+		}
+	}
+
+	if ((if_fd = open("/dev/tun", O_RDWR, 0)) < 0)
+	{
+		tuntap_log(TUNTAP_LOG_ERR, "Can't open /dev/tun (2)");
+		return -1;
+	}
+
+	if (ioctl(if_fd, I_PUSH, "ip") < 0)
+	{
+		tuntap_log(TUNTAP_LOG_ERR, "Can't push IP module");
+		return -1;
+	}
+
+	/* Assign ppa according to the unit number returned by tun device */
+	if (ioctl(if_fd, IF_UNITSEL, (char *) &ppa) < 0)
+	{
+		char *msg = alloca(512);
+		sprintf(msg, "Can't set PPA %i", ppa);
+		tuntap_log(TUNTAP_LOG_ERR, msg);
+		return -1;
+	}
+
+	snprintf(dev->internal_name, IF_NAMESIZE, "%s%d", "tun", ppa);
+
+	if ((ip_muxid = ioctl(dev->ip_fd, I_PLINK, if_fd)) < 0)
+	{
+		tuntap_log(TUNTAP_LOG_ERR, "Can't link tun device to IP");
+		return -1;
+	}
+
+	explicit_bzero(&lifr, sizeof lifr);
+	explicit_bzero(&ifr, sizeof ifr);
+	memcpy(lifr.lifr_name, dev->internal_name, sizeof(lifr.lifr_name));
+	lifr.lifr_ip_muxid  = ip_muxid;
+
+	if (ioctl(dev->ip_fd, SIOCSLIFMUXID, &lifr) < 0)
+	{
+		ioctl(dev->ip_fd, I_PUNLINK, ip_muxid);
+		tuntap_log(TUNTAP_LOG_ERR, "Can't set multiplexor id");
+		return -1;
+	}
+
+	fcntl(dev->tun_fd, F_SETFL, O_NONBLOCK);
+	fcntl(dev->tun_fd, F_SETFD, FD_CLOEXEC);
+	fcntl(dev->ip_fd, F_SETFD, FD_CLOEXEC);
+	char *msg = alloca(512);
+	sprintf(msg, "TUN device %s opened as %s", dev->if_name, dev->internal_name);
+	tuntap_log(TUNTAP_LOG_INFO, msg);
+
+	(void)memcpy(ifr.ifr_name, dev->internal_name, sizeof dev->internal_name);
+
+	/* Get the interface default values */
+	if(ioctl(dev->ctrl_sock, SIOCGIFFLAGS, &ifr) == -1)
+	{
+		tuntap_log(TUNTAP_LOG_ERR, "Can't get interface values");
+		return -1;
+	}
+	/* Save flags for tuntap_{up, down} */
+	dev->flags = ifr.ifr_flags;
+	return 0;
 }
 
 int
-tuntap_sys_start(struct device *dev, int mode, int tun)
+tuntap_sys_start(struct device *dev, int mode, int tun) 
 {
-  return -1;
+	/* Forces automatic selection of device instance
+	 * in tuntap_sys_create_dev().
+	 * This also clears the specified interface name.
+	 */
+	if (tun == TUNTAP_ID_ANY)
+		memset(&dev->if_name, '\0', sizeof dev->if_name);
+
+	if (mode == TUNTAP_MODE_TUNNEL)
+	{
+		return tuntap_sys_create_dev(dev, tun);
+	}
+	else
+		return -1;
+	/* NOTREACHED */
 }
 
+
 void
 tuntap_sys_destroy(struct device *dev)
 {
-  return /*-1*/;
-}
+	struct lifreq ifr;
 
-int
-tuntap_sys_set_hwaddr(struct device *dev, struct ether_addr *eth_addr)
-{
-  return -1;
+	explicit_bzero(&ifr, sizeof ifr);
+	strncpy(ifr.lifr_name, dev->internal_name, sizeof(ifr.lifr_name));
+
+	if (ioctl(dev->ip_fd, SIOCGLIFFLAGS, &ifr) < 0)
+	{
+		tuntap_log(TUNTAP_LOG_WARN, "Can't get iface flags");
+	}
+
+	if (ioctl(dev->ip_fd, SIOCGLIFMUXID, &ifr) < 0)
+	{
+		tuntap_log(TUNTAP_LOG_WARN, "Can't get multiplexor id");
+	}
+
+	/* we don't support TAP, and i think jaff stripped out TAP code a while 
+	 * back...
+	 */
+
+	if (ioctl(dev->ip_fd, I_PUNLINK, ifr.lifr_ip_muxid) < 0)
+	{
+		tuntap_log(TUNTAP_LOG_WARN, "Can't unlink interface(ip)");
+	}
+
+	close(dev->ip_fd);
+	dev->ip_fd = -1;
 }
 
+
 int
-tuntap_sys_set_ipv4(struct device *dev, t_tun_in_addr *s4, uint32_t imask)
+tuntap_sys_set_ipv4(struct device *dev, t_tun_in_addr *s4, uint32_t bits) 
 {
-  return -1;
+	struct lifreq ifr;
+	struct sockaddr_in mask;
+
+	(void)memset(&ifr, '\0', sizeof ifr);
+	(void)memcpy(ifr.lifr_name, dev->internal_name, sizeof dev->internal_name);
+
+	/* Set the IP address first */
+	(void)memcpy(&(((struct sockaddr_in *)&ifr.lifr_addr)->sin_addr), s4,
+		sizeof(struct in_addr));
+	ifr.lifr_addr.ss_family = AF_INET;
+	if(ioctl(dev->ctrl_sock, SIOCSLIFADDR, &ifr) == -1)
+	{
+		tuntap_log(TUNTAP_LOG_ERR, "Can't set IP address");
+		return -1;
+	}
+
+	/* Reinit the struct ifr */
+	(void)memset(&ifr.lifr_addr, '\0', sizeof ifr.lifr_addr);
+
+	/* Then set the netmask */
+	(void)memset(&mask, '\0', sizeof mask);
+	mask.sin_family      = AF_INET;
+	mask.sin_addr.s_addr = bits;
+	(void)memcpy(&ifr.lifr_addr, &mask, sizeof mask);
+	if(ioctl(dev->ctrl_sock, SIOCSLIFNETMASK, &ifr) == -1)
+	{
+		tuntap_log(TUNTAP_LOG_ERR, "Can't set netmask");
+		return -1;
+	}
+
+	return 0;
 }
 
 int
 tuntap_sys_set_ipv6(struct device *dev, t_tun_in6_addr *s6, uint32_t imask)
 {
-  return -1;
+	(void)dev;
+	(void)s6;
+	(void)imask;
+	tuntap_log(TUNTAP_LOG_NOTICE, "IPv6 is configured manually, this is currently unsupported");
+	return -1;
 }
 
 int
-tuntap_sys_set_ifname(struct device *dev, const char *ifname, size_t len) 
+tuntap_sys_set_ifname(struct device *dev, const char *ifname, size_t len)
 {
-  return -1;
+	/* Not quite sure if solaris SIOCSLIFNAME work the same way as on Linux,
+	 * given the correct parameters.
+	 */
+	(void)dev;
+	(void)ifname;
+	(void)len;
+	tuntap_log(TUNTAP_LOG_NOTICE,
+		"Your system does not support tuntap_set_ifname()");
+	return -1;
 }
 
 int
 tuntap_sys_set_descr(struct device *dev, const char *descr, size_t len)
 {
-  (void)dev;
-  (void)descr;
-  (void)len;
-  return -1;
-}
+	(void)dev;
+	(void)descr;
+	(void)len;
+	tuntap_log(TUNTAP_LOG_NOTICE,
+		"Your system does not support tuntap_set_descr()");
+	return -1;
+}

vendor/libtuntap-master/tuntap-unix.c

@@ -173,6 +173,10 @@ tuntap_set_ifname(struct device *dev, const char *ifname)
 int
 tuntap_up(struct device *dev)
 {
+  /* On Solaris, the interface automatically comes up when an IP
+   * address is first assigned.
+   */
+#ifndef __sun
   struct ifreq ifr;
 
   (void)memset(&ifr, '\0', sizeof ifr);
@@ -186,6 +190,7 @@ tuntap_up(struct device *dev)
   }
 
   dev->flags = ifr.ifr_flags;
+#endif
   return 0;
 }