Commit | Line | Data |
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8dea8d37 SE |
1 | * Planned for the future |
2 | ||
469fd1d9 | 3 | Netlink device that implements an Ethernet bridge. |
8dea8d37 | 4 | |
469fd1d9 SE |
5 | Modular transform code: choice of block ciphers, modes, sequence |
6 | numbers / timestamps, etc. similar to IWJ's udptunnel | |
8dea8d37 | 7 | |
d3fe100d SE |
8 | Path-MTU discovery for each tunnel, and fragmentation/DF support in |
9 | netlink code. | |
10 | ||
11 | * New in version 0.1.12 | |
12 | ||
13 | IMPORTANT: fix calculation of 'now' in secnet.c; necessary for correct | |
14 | operation. | |
15 | ||
16 | (Only interesting for people building and modifying secnet by hand: | |
17 | the Makefile now works out most dependencies automatically.) | |
18 | ||
19 | The netlink code no longer produces an internal routing table sorted | |
20 | by netmask length. Instead, netlink instances have a 'priority'; the | |
21 | table of routes is sorted by priority. Devices like laptops that have | |
22 | tunnels that must sometimes 'mask' parts of other tunnels should be | |
23 | given higher priorities. If a priority is not specified it is assumed | |
24 | to be zero. | |
25 | ||
26 | Example usage: | |
27 | site laptop { ... | |
28 | link netlink { | |
29 | route "192.168.73.74/31"; | |
30 | priority 10; | |
31 | }; | |
32 | }; | |
33 | ||
794f2398 SE |
34 | * New in version 0.1.11 |
35 | ||
36 | Lists of IP addresses in the configuration file can now include | |
37 | exclusions as well as inclusions. For example, you can specify all | |
38 | the hosts on a subnet except one as follows: | |
39 | ||
40 | networks "192.168.73.0/24","!192.168.73.70"; | |
41 | ||
42 | (If you were only allowed inclusions, you'd have to specify that like | |
43 | this: | |
44 | networks "192.168.73.71/32","192.168.73.68/31","192.168.73.64/30", | |
45 | "192.168.73.72/29","192.168.73.80/28","192.168.73.96/27", | |
46 | "192.168.73.0/26","192.168.73.128/25"; | |
47 | ) | |
48 | ||
49 | secnet now ensures that it invokes userv-ipif with a non-overlapping | |
50 | list of subnets. | |
51 | ||
52 | There is a new command-line option, --sites-key or -s, that enables | |
53 | the configuration file key that's checked to determine the list of | |
54 | active sites (default "sites") to be changed. This enables a single | |
55 | configuration file to contain multiple cofigurations conveniently. | |
56 | ||
57 | NAKs are now sent when packets arrive that are not understood. The | |
58 | tunnel code initiates a key setup if it sees a NAK. Future | |
59 | developments should include configuration options that control this. | |
60 | ||
61 | The tunnel code notifies its peer when secnet is terminating, so the | |
62 | peer can close the session. | |
63 | ||
64 | The netlink "exclude-remote-networks" option has now been replaced by | |
65 | a "remote-networks" option; instead of specifying networks that no | |
66 | site may access, you specify the set of networks that remote sites are | |
67 | allowed to access. A sensible example: "192.168.0.0/16", | |
68 | "172.16.0.0/12", "10.0.0.0/8", "!your-local-network" | |
469fd1d9 SE |
69 | |
70 | * New in version 0.1.10 | |
71 | ||
72 | WARNING: THIS VERSION MAKES A CHANGE TO THE CONFIGURATION FILE FORMAT | |
73 | THAT IS NOT BACKWARD COMPATIBLE. However, in most configurations the | |
74 | change only affects the sites.conf file, which is generated by the | |
75 | make-secnet-sites script; after you regenerate your sites.conf using | |
76 | version 0.1.10, everything should continue to work. | |
77 | ||
78 | Netlink devices now interact slightly differently with the 'site' | |
79 | code. When you invoke a netlink closure like 'tun' or 'userv-ipif', | |
80 | you get another closure back. You then invoke this closure (usually | |
81 | in the site definitions) to specify things like routes and options. | |
82 | The result of this invocation should be used as the 'link' option in | |
83 | site configurations. | |
84 | ||
85 | All this really means is that instead of site configurations looking | |
86 | like this: | |
87 | ||
88 | foo { | |
89 | name "foo"; | |
90 | networks "a", "b", "c"; | |
91 | etc. | |
92 | }; | |
93 | ||
94 | ...they look like this: | |
95 | ||
96 | foo { | |
97 | name "foo"; | |
98 | link netlink { routes "a", "b", "c"; }; | |
99 | etc. | |
100 | }; | |
101 | ||
102 | This change was made to enable the 'site' code to be completely free | |
103 | of any knowledge of the contents of the packets it transmits. It | |
104 | should now be possible in the future to tunnel other protocols like | |
105 | IPv6, IPX, raw Ethernet frames, etc. without changing the 'site' code | |
106 | at all. | |
107 | ||
108 | Point-to-point netlink devices work slightly differently; when you | |
109 | apply the 'tun', 'userv-ipif', etc. closure and specify the | |
110 | ptp-address option, you must also specify the 'routes' option. The | |
111 | result of this invocation should be passed directly to the 'link' | |
112 | option of the site configuration. You can do things like this: | |
113 | ||
114 | sites site { | |
115 | name "foo"; | |
116 | link tun { | |
117 | networks "192.168.73.76/32"; | |
118 | local-address "192.168.73.76"; # IP address of interface | |
119 | ptp-address "192.168.73.75"; # IP address of other end of link | |
120 | routes "192.168.73.74/32"; | |
121 | mtu 1400; | |
122 | buffer sysbuffer(); | |
123 | }; | |
124 | etc. | |
125 | }; | |
126 | ||
127 | The route dump obtained by sending SIGUSR1 to secnet now includes | |
128 | packet counts. | |
129 | ||
130 | Point-to-point mode has now been tested. | |
131 | ||
132 | tun-old has now been tested, and the annoying 'untested' message has | |
133 | been removed. Thanks to SGT and JDA. | |
134 | ||
135 | secnet now closes its stdin, stdout and stderr just after | |
136 | backgrounding. | |
137 | ||
138 | Bugfix: specifying network "0.0.0.0/0" (or "default") now works | |
139 | correctly. | |
140 | ||
8dea8d37 SE |
141 | * New in version 0.1.9 |
142 | ||
143 | The netlink code may now generate ICMP responses to ICMP messages that | |
144 | are not errors, eg. ICMP echo-request. This makes Windows NT | |
145 | traceroute output look a little less strange. | |
146 | ||
147 | configure.in and config.h.bot now define uint32_t etc. even on systems | |
148 | without stdint.h and inttypes.h (needed for Solaris 2.5.1) | |
149 | ||
150 | GNU getopt is included for systems that lack it. | |
151 | ||
152 | We check for LOG_AUTHPRIV before trying to use it in log.c (Solaris | |
153 | 2.5.1 doesn't have it.) | |
154 | ||
155 | Portable snprintf.c from http://www.ijs.si/software/snprintf/ is | |
156 | included for systems that lack snprintf/vsnprintf. | |
157 | ||
158 | make-secnet-sites.py renamed to make-secnet-sites and now installed in | |
159 | $prefix/sbin/make-secnet-sites; ipaddr.py library installed in | |
160 | $prefix/share/secnet/ipaddr.py. make-secnet-sites searches | |
161 | /usr/local/share/secnet and /usr/share/secnet for ipaddr.py | |
162 | ||
c6f79b17 SE |
163 | * New in version 0.1.8 |
164 | ||
165 | Netlink devices now support a 'point-to-point' mode. In this mode the | |
166 | netlink device does not require an IP address; instead, the IP address | |
167 | of the other end of the tunnel is specified using the 'ptp-address' | |
168 | option. Precisely one site must be configured to use the netlink | |
8dea8d37 SE |
169 | device. (I haven't had a chance to test this because 0.1.8 turned into |
170 | a 'quick' release to enable secnet to cope with the network problems | |
171 | affecting connections going via LINX on 2001-10-16.) | |
c6f79b17 SE |
172 | |
173 | The tunnel code in site.c now initiates a key setup if the | |
174 | reverse-transform function fails (wrong key, bad MAC, too much skew, | |
175 | etc.) - this should make secnet more reliable on dodgy links, which | |
176 | are much more common than links with active attackers... (an attacker | |
177 | can now force a new key setup by replaying an old packet, but apart | |
178 | from minor denial of service on slow links or machines this won't | |
8dea8d37 | 179 | achieve them much). This should eventually be made configurable. |
c6f79b17 SE |
180 | |
181 | The sequence number skew detection code in transform.c now only | |
182 | complains about 'reverse skew' - replays of packets that are too | |
183 | old. 'Forward skew' (gaps in the sequence numbers of received packets) | |
184 | is now tolerated silently, to cope with large amounts of packet loss. |