Allow random IP number allocation to peer.

Validate the peers suggested IP by attempting to make a routing table
entry.
Give up IPCP negotiation if the peer NAKs us with an unusable IP.
Always SIOCDIFADDR then SIOCAIFADDR when configuring the tun device.
Using SIOCSIFDSTADDR allows duplicate dst addresses (which we don't
want)!!!
Allow up to 200 interface names (was 50) (now that ppp can play server
properly).
Up the version number (1.5 -> 1.6).

Cosmetic:
  Log unexpected CCP packets in the CCP log rather than the ERROR log.
  Log unexpected Config Reqs in the appropriate LCP/IPCP/CCP log rather
  than the ERROR log.
  Log failed route additions and deletions with WARN, not TCPIP.
  Log the option id and length for unrecognised IPCP options.
  Change some .Sq to .Ar in the man page.

1 files changed, 24 insertions, 0 deletions

diff --git a/usr.sbin/ppp/iplist.h b/usr.sbin/ppp/iplist.h
new file mode 100644
index 0000000..cee4deb
--- /dev/null
+++ b/usr.sbin/ppp/iplist.h
@@ -0,0 +1,24 @@
+/*
+ * $Id:$
+ */
+
+struct iplist {
+  struct iplist_cur {
+    struct in_addr ip;
+    int pos;
+    char *srcptr;
+    int srcitem;
+    u_long lstart, nItems;
+  } cur;
+  int nItems;
+  char src[LINE_LEN];
+};
+
+extern int iplist_setsrc(struct iplist *, const char *);
+extern void iplist_reset(struct iplist *);
+extern struct in_addr iplist_setcurpos(struct iplist *, int);
+extern struct in_addr iplist_setrandpos(struct iplist *);
+extern int iplist_ip2pos(struct iplist *, struct in_addr);
+extern struct in_addr iplist_next(struct iplist *);
+
+#define iplist_isvalid(x) ((x)->src[0] != '\0')