Update lwIP to forked and patched version supporting 6PLANE addressing

ext/lwip-contrib.patch

@@ -1,32 +0,0 @@
-diff --git a/ports/unix/port/include/arch/cc.h b/ports/unix/port/include/arch/cc.h
-index 80b37d8..ed219f3 100644
---- a/ports/unix/port/include/arch/cc.h
-+++ b/ports/unix/port/include/arch/cc.h
-@@ -32,6 +32,8 @@
- #ifndef LWIP_ARCH_CC_H
- #define LWIP_ARCH_CC_H
- 
-+#include "Debug.hpp" // libzt
-+
- /* see https://sourceforge.net/p/predef/wiki/OperatingSystems/ */
- #if defined __ANDROID__
- #define LWIP_UNIX_ANDROID
-@@ -65,7 +67,7 @@
- #endif
- 
- #if defined(LWIP_UNIX_ANDROID) && defined(FD_SET)
--typedef __kernel_fd_set fd_set;
-+//typedef __kernel_fd_set fd_set;
- #endif
- 
- #if defined(LWIP_UNIX_MACH)
-@@ -76,6 +78,9 @@ typedef __kernel_fd_set fd_set;
- #define LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS
- #endif
- 
-+// Comment out the following line to use lwIP's default diagnostic printing routine
-+#define LWIP_PLATFORM_DIAG(x)    do {DEBUG_INFO x;} while(0)
-+
- struct sio_status_s;
- typedef struct sio_status_s sio_status_t;
- #define sio_fd_t sio_status_t*

ext/lwip.patch

@@ -1,87 +0,0 @@
-diff --git a/src/api/sockets.c b/src/api/sockets.c
-index 2d231739..a0c24829 100644
---- a/src/api/sockets.c
-+++ b/src/api/sockets.c
-@@ -38,6 +38,7 @@
-  */
- 
- #include "lwip/opt.h"
-+#include "ZeroTierConstants.h"
- 
- #if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
- 
-@@ -281,6 +282,7 @@ static struct lwip_select_cb *select_cb_list;
- #define sock_set_errno(sk, e) do { \
-   const int sockerr = (e); \
-   set_errno(sockerr); \
-+  zts_errno = sockerr; \
- } while (0)
- 
- /* Forward declaration of some functions */
-diff --git a/src/core/ipv6/nd6.c b/src/core/ipv6/nd6.c
-index 039b7963..6647c90c 100644
---- a/src/core/ipv6/nd6.c
-+++ b/src/core/ipv6/nd6.c
-@@ -1644,9 +1644,27 @@ nd6_is_prefix_in_netif(const ip6_addr_t *ip6addr, struct netif *netif)
-    * addresses (from autoconfiguration) have no implied subnet assignment, and
-    * are thus effectively /128 assignments. See RFC 5942 for more on this. */
-   for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
--    if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) &&
-+    /*if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) &&
-         netif_ip6_addr_isstatic(netif, i) &&
--        ip6_addr_netcmp(ip6addr, netif_ip6_addr(netif, i))) {
-+        ip6_addr_netcmp(ip6addr, netif_ip6_addr(netif, i))) {*/
-+      int prefix_match = 0;
-+    if (ip6_addr_is_zt_6plane(ip6addr)) {
-+      prefix_match = ip6_addr_6plane_cmp(ip6addr, netif_ip6_addr(netif, i));
-+      DEBUG_INFO("6plane, prefix_match=%d", prefix_match);
-+    }
-+    if (ip6_addr_is_zt_adhoc(ip6addr)) {
-+      prefix_match = ip6_addr_adhoc_cmp(ip6addr, netif_ip6_addr(netif, i));
-+      DEBUG_INFO("adhoc, prefix_match=%d", prefix_match);
-+    }
-+    if (ip6_addr_is_zt_rfc4193(ip6addr)) {
-+      prefix_match = ip6_addr_rfc4193_cmp(ip6addr, netif_ip6_addr(netif, i));
-+      DEBUG_INFO("rfc4193, prefix_match=%d", prefix_match);
-+    }
-+    if (!prefix_match) {
-+      prefix_match = ip6_addr_netcmp(ip6addr, netif_ip6_addr(netif, i));
-+      DEBUG_INFO("traditional match, prefix_match=%d", prefix_match);
-+    }
-+    if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) && prefix_match) {
-       return 1;
-     }
-   }
-diff --git a/src/include/lwip/ip6_addr.h b/src/include/lwip/ip6_addr.h
-index 29c2a34d..205b0e1f 100644
---- a/src/include/lwip/ip6_addr.h
-+++ b/src/include/lwip/ip6_addr.h
-@@ -160,6 +160,28 @@ typedef struct ip6_addr ip6_addr_t;
- #define ip6_addr_netcmp(addr1, addr2) (ip6_addr_netcmp_zoneless((addr1), (addr2)) && \
-                                        ip6_addr_cmp_zone((addr1), (addr2)))
- 
-+/* Determine if an address *could* be a ZeroTier 6PLANE address */
-+#define ip6_addr_is_zt_6plane(addr1) (((addr1)->addr[0] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xfc000000UL))
-+
-+/* Compare first 40 bits of address (ff + first 32 bits of nwid XOR'd with second 32 bits of nwid) */
-+#define ip6_addr_6plane_cmp(addr1, addr2) (((addr1)->addr[0] == (addr2)->addr[0]) && \
-+                                    ((addr1)->addr[1] & PP_HTONL(0xff000000UL)) == ((addr2)->addr[1] & PP_HTONL(0xff000000UL)))
-+
-+/* Determine if an address *could* be a ZeroTier Ad-hoc address */
-+#define ip6_addr_is_zt_adhoc(addr1) (((addr1)->addr[0] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xff000000UL))
-+
-+/* Compare first 40 bits of address (ff + first 32 bits of nwid XOR'd with second 32 bits of nwid) */
-+#define ip6_addr_adhoc_cmp(addr1, addr2) (((addr1)->addr[0] == (addr2)->addr[0]) && \
-+                                    ((addr1)->addr[1] & PP_HTONL(0xff000000UL)) == ((addr2)->addr[1] & PP_HTONL(0xff000000UL)))
-+
-+/* Determine if an address *could* be an RFC4193 address */
-+#define ip6_addr_is_zt_rfc4193(addr1) (((addr1)->addr[0] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xfd000000UL))
-+
-+/* Compare first 72 bits of address (fd + 64 bits of nwid) */
-+#define ip6_addr_rfc4193_cmp(addr1, addr2) (((addr1)->addr[0] == (addr2)->addr[0]) && \
-+                                    ((addr1)->addr[1] == (addr2)->addr[1]) && \
-+                                    ((addr1)->addr[2] & PP_HTONL(0xff000000UL)) == ((addr2)->addr[2] & PP_HTONL(0xff000000UL)))
-+
- /* Exact-host comparison *after* ip6_addr_netcmp() succeeded, for efficiency. */
- #define ip6_addr_nethostcmp(addr1, addr2) (((addr1)->addr[2] == (addr2)->addr[2]) && \
-                                            ((addr1)->addr[3] == (addr2)->addr[3]))