oweals/odhcp6c.git
8 years agoMerge pull request #42 from bwhacks/logic-fixes
Steven Barth [Thu, 28 Jan 2016 19:06:46 +0000 (20:06 +0100)]
Merge pull request #42 from bwhacks/logic-fixes

Logic fixes

8 years agoMerge pull request #41 from bwhacks/security-fixes
Steven Barth [Thu, 28 Jan 2016 15:59:12 +0000 (16:59 +0100)]
Merge pull request #41 from bwhacks/security-fixes

Security fixes

8 years agoFix iteration after expiring a list entry
Ben Hutchings [Fri, 22 Jan 2016 19:34:41 +0000 (19:34 +0000)]
Fix iteration after expiring a list entry

After removing an entry, the next entry will be at the same offset as
the entry we just removed.  Also the total length will have changed.

Update the length when we remove an entry, and advance the offset only
when we don't.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoFix script environment variable setting for empty lists
Ben Hutchings [Fri, 22 Jan 2016 20:13:35 +0000 (20:13 +0000)]
Fix script environment variable setting for empty lists

When setting an environment variable as a space-separated list, and
the list is empty, we must not delete the '=' before the value.

In practice putenv() is likely to discard the invalid string, leaving
the variable unset, but this is not guaranteed.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoAdd missing option length checks in dhcpv6_handle_advert
Ben Hutchings [Thu, 28 Jan 2016 02:09:47 +0000 (02:09 +0000)]
Add missing option length checks in dhcpv6_handle_advert

These might be redundant with checks elsewhere but it's better to be
safe.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoFix potential log forgery via status string
Ben Hutchings [Thu, 28 Jan 2016 01:44:10 +0000 (01:44 +0000)]
Fix potential log forgery via status string

We should not include any control characters from the server status
message when logging it; in particular if we include '\n' this could
result in additional arbitrary log lines.  In dhcpv6_log_status_code,
replace all control characters with '?'.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoCheck for unsupported PD exclusion configuration in dhcpv6_parse_ia
Ben Hutchings [Thu, 28 Jan 2016 01:28:32 +0000 (01:28 +0000)]
Check for unsupported PD exclusion configuration in dhcpv6_parse_ia

We currently only support PD exclusions that only affect bits 64-95 of
the address, so we require:

    32 <= PD prefix length < exclusion prefix length <= 64

The first inequality was not validated, and this could result in a
buffer overflow when generating the next request message.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoFix memory leak in dhcpv6_add_server_cand in case odhcp6c_insert_state fails
Ben Hutchings [Thu, 28 Jan 2016 01:16:31 +0000 (01:16 +0000)]
Fix memory leak in dhcpv6_add_server_cand in case odhcp6c_insert_state fails

If we fail to store information from the new server, the associated
NA and PD options will never be freed.  An attacker could use this
for denial-of-service.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoChange odhcp6c_insert_state to return a success/failure indicator
Ben Hutchings [Thu, 28 Jan 2016 01:14:04 +0000 (01:14 +0000)]
Change odhcp6c_insert_state to return a success/failure indicator

Some callers will need to free resources on failure.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoFix possible stack buffer overflow in s46_to_env when copying IPv6 prefixes
Ben Hutchings [Thu, 28 Jan 2016 00:49:22 +0000 (00:49 +0000)]
Fix possible stack buffer overflow in s46_to_env when copying IPv6 prefixes

An 8-bit prefix-length field can be as large as 255, but values larger
than 128 will result in a buffer overflow when copying to in6.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoFix off-by-one in buffer length in int_to_env
Ben Hutchings [Fri, 22 Jan 2016 19:07:52 +0000 (19:07 +0000)]
Fix off-by-one in buffer length in int_to_env

We need to allow for '=', negative sign, 10 digits and the null
terminator, adding up to 13 bytes not 12.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoFix potential buffer overflow in entry_to_env
Ben Hutchings [Fri, 22 Jan 2016 18:02:04 +0000 (18:02 +0000)]
Fix potential buffer overflow in entry_to_env

It appears that an entry of type ENTRY_PREFIX with iaid != 1 and an
exclusion can expand to a string of length up to 154 bytes, whereas we
allocate only 144 bytes per entry.

Also, in case of truncation, snprintf() returns the length of the
un-truncated output so we must not use this to increment buf_len.

Finally some of the lengths given to snprintf() are unnecessarily
generous.  Reduce them so we don't have to increase the allocated
length per entry further.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoAvoid copying buffer after dn_expand() fails
Ben Hutchings [Fri, 22 Jan 2016 20:15:31 +0000 (20:15 +0000)]
Avoid copying buffer after dn_expand() fails

If dn_expand() returns an error we could copy from an uninitialised
output buffer or append the previous domain name again.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
8 years agoMerge pull request #40 from dedeckeh/bugfixes
Steven Barth [Tue, 26 Jan 2016 19:29:01 +0000 (20:29 +0100)]
Merge pull request #40 from dedeckeh/bugfixes

script: Launch script with correct action if last script call is terminated

8 years agoscript: Launch script with correct action if last script call is terminated
Hans Dedecker [Tue, 26 Jan 2016 08:20:33 +0000 (09:20 +0100)]
script: Launch script with correct action if last script call is terminated

Actions launched as resume will be used in a next script_call
if the new action is not marked as resume even when the previous
script run was already terminated.
This behavior is particular visible when a RA is received as
the script will run with action bound and not ra-updated
resulting into a wan6 interface down/up transition

9 years agoodhcp6c: sync and accumulate RA & DHCPv6 events correctly
Steven Barth [Mon, 27 Jul 2015 13:39:11 +0000 (15:39 +0200)]
odhcp6c: sync and accumulate RA & DHCPv6 events correctly

9 years agoMerge pull request #37 from themiron/master
Steven Barth [Mon, 13 Jul 2015 14:15:52 +0000 (16:15 +0200)]
Merge pull request #37 from themiron/master

Avoid solicit for zero-length prefix

9 years agoMerge branch 'upstream'
Vladislav Grishenko [Mon, 13 Jul 2015 13:12:41 +0000 (18:12 +0500)]
Merge branch 'upstream'

9 years agodhcpv6: remove dead code
Steven Barth [Mon, 13 Jul 2015 10:38:42 +0000 (12:38 +0200)]
dhcpv6: remove dead code

9 years agoAvoid solicit for zero-length prefix
Vladislav Grishenko [Sun, 12 Jul 2015 12:02:30 +0000 (17:02 +0500)]
Avoid solicit for zero-length prefix

9 years agodhcpv6: clear CUSTOM_OPTS in a more sane manner
Steven Barth [Tue, 9 Jun 2015 12:04:59 +0000 (14:04 +0200)]
dhcpv6: clear CUSTOM_OPTS in a more sane manner

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoFix LW4over6 parameter handling
Steven Barth [Sat, 16 May 2015 07:28:01 +0000 (09:28 +0200)]
Fix LW4over6 parameter handling

9 years agoMerge pull request #33 from themiron/master
Steven Barth [Sat, 25 Apr 2015 16:49:59 +0000 (18:49 +0200)]
Merge pull request #33 from themiron/master

Avoid of waiting for Advertise in stateless-only mode

9 years agoAvoid of waiting for Advertise in stateless-only mode
Vladislav Grishenko [Sat, 25 Apr 2015 15:52:57 +0000 (20:52 +0500)]
Avoid of waiting for Advertise in stateless-only mode

Start with Information-request when configured not to ask
IA_NA/IA_PD. It allows to complete the exchange using only
two messages, instead of four, and fixes infinite Advertise
waiting loop with servers that just ignore Solicit messages.

9 years agoFixup INF_MAX_RT for RFC 3315 as well
Steven Barth [Mon, 20 Apr 2015 09:59:56 +0000 (11:59 +0200)]
Fixup INF_MAX_RT for RFC 3315 as well

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoFix SOL_MAX_RT default value to match RFC 3315
Steven Barth [Mon, 20 Apr 2015 09:16:21 +0000 (11:16 +0200)]
Fix SOL_MAX_RT default value to match RFC 3315

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoexample: actually chmod new resolv.conf after overwriting
Steven Barth [Wed, 15 Apr 2015 13:02:55 +0000 (15:02 +0200)]
example: actually chmod new resolv.conf after overwriting

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agora: avoid saving an empty search domain entry
Steven Barth [Wed, 15 Apr 2015 12:55:57 +0000 (14:55 +0200)]
ra: avoid saving an empty search domain entry

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoscan-code fixes
Steven Barth [Tue, 14 Apr 2015 06:24:44 +0000 (08:24 +0200)]
scan-code fixes

9 years agoImprove handling of DNS search domains
Steven Barth [Mon, 13 Apr 2015 12:48:52 +0000 (14:48 +0200)]
Improve handling of DNS search domains

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoFix odhcp6c_find_entry
Steven Barth [Sun, 12 Apr 2015 12:02:59 +0000 (14:02 +0200)]
Fix odhcp6c_find_entry

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoRemove obsolete prefix class support
Steven Barth [Sun, 12 Apr 2015 07:15:22 +0000 (09:15 +0200)]
Remove obsolete prefix class support

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoSanitize RA values less
Steven Barth [Fri, 10 Apr 2015 11:31:56 +0000 (13:31 +0200)]
Sanitize RA values less

9 years agoPass ICMP configuration to user-space instead of directly applying it
Steven Barth [Fri, 10 Apr 2015 11:19:44 +0000 (13:19 +0200)]
Pass ICMP configuration to user-space instead of directly applying it

9 years agoUpdate README
Steven Barth [Thu, 9 Apr 2015 08:16:02 +0000 (10:16 +0200)]
Update README

9 years agoscript: don't resolve AFTR since DNS won't be applied yet anyway
Steven Barth [Thu, 9 Apr 2015 07:51:39 +0000 (09:51 +0200)]
script: don't resolve AFTR since DNS won't be applied yet anyway

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoproperly handle return codes
John Crispin [Sat, 28 Mar 2015 16:58:44 +0000 (17:58 +0100)]
properly handle return codes

Signed-off-by: John Crispin <blogic@openwrt.org>
9 years agora: use proper struct msghdr initializer to fix build error on musl
Felix Fietkau [Sun, 29 Mar 2015 02:35:17 +0000 (04:35 +0200)]
ra: use proper struct msghdr initializer to fix build error on musl

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
9 years agomake route metric more compatible with linux defaults
Steven Barth [Wed, 25 Mar 2015 18:23:59 +0000 (19:23 +0100)]
make route metric more compatible with linux defaults

9 years agoGet rid of getifaddrs for interface ID detection
Steven Barth [Wed, 11 Mar 2015 09:06:54 +0000 (10:06 +0100)]
Get rid of getifaddrs for interface ID detection

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoMerge pull request #30 from themiron/master
Steven Barth [Tue, 17 Feb 2015 17:43:35 +0000 (18:43 +0100)]
Merge pull request #30 from themiron/master

Fix handling of DHCPv6 replies containing unrequested IA_NA/IA_PD options

9 years agoFix handling of DHCPv6 replies containing unrequested IA_NA/IA_PD options
Vladislav Grishenko [Tue, 17 Feb 2015 17:28:45 +0000 (22:28 +0500)]
Fix handling of DHCPv6 replies containing unrequested IA_NA/IA_PD options

9 years agoexample: prevent script from running in parallel to avoid races
Steven Barth [Tue, 17 Feb 2015 13:41:04 +0000 (14:41 +0100)]
example: prevent script from running in parallel to avoid races

9 years agoset default information refresh time to 86400 as per RFC 4242
Steven Barth [Tue, 13 Jan 2015 08:36:42 +0000 (09:36 +0100)]
set default information refresh time to 86400 as per RFC 4242

9 years agoREADME: adjust for a bit of feature creep
Steven Barth [Tue, 6 Jan 2015 13:29:47 +0000 (14:29 +0100)]
README: adjust for a bit of feature creep

9 years agoMerge pull request #28 from janakj/master
Steven Barth [Wed, 31 Dec 2014 14:49:47 +0000 (15:49 +0100)]
Merge pull request #28 from janakj/master

Minor help string clarification for client-ID

9 years agoMinor help string clarification for client-ID
Jan Janak [Wed, 31 Dec 2014 14:22:35 +0000 (15:22 +0100)]
Minor help string clarification for client-ID

Document that the value of -c must be a 16-bit type (network byte order) followed by a client-ID value.
For example, to use a UUID based client-ID (type 4, RFC 6355) one could use the following cmdline option:
  -c0004<128_bit_uuid_in_hex>

9 years agoAvoid sending empty DHCPv6 release messages
Steven Barth [Wed, 10 Dec 2014 10:40:40 +0000 (11:40 +0100)]
Avoid sending empty DHCPv6 release messages

9 years agoDon't apply excess filter to DHCPv6 and unify odhcp6c_update_entry
Steven Barth [Wed, 10 Dec 2014 10:38:20 +0000 (11:38 +0100)]
Don't apply excess filter to DHCPv6 and unify odhcp6c_update_entry

9 years agoMore compatibility with non RFC-compliant servers
Steven Barth [Sun, 30 Nov 2014 19:25:45 +0000 (20:25 +0100)]
More compatibility with non RFC-compliant servers

Signed-off-by: Steven Barth <steven@midlink.org>
9 years agoCleanup pidfile-gerneration
Steven Barth [Fri, 28 Nov 2014 09:20:35 +0000 (10:20 +0100)]
Cleanup pidfile-gerneration

9 years agoBe less picky when erroring out due to strange IA status-codes
Steven Barth [Fri, 28 Nov 2014 00:36:44 +0000 (01:36 +0100)]
Be less picky when erroring out due to strange IA status-codes

9 years agoFix initial delay of SOLICIT message
Steven Barth [Fri, 28 Nov 2014 00:29:59 +0000 (01:29 +0100)]
Fix initial delay of SOLICIT message

Signed-off-by: Steven Barth <steven@midlink.org>
10 years agoFix msghdr initialization on musl
Steven Barth [Tue, 18 Nov 2014 09:36:06 +0000 (10:36 +0100)]
Fix msghdr initialization on musl

10 years agoBe less verbose by default and add -v flag
Steven Barth [Tue, 18 Nov 2014 09:25:22 +0000 (10:25 +0100)]
Be less verbose by default and add -v flag

10 years agoupdate cer-id definition
Steven Barth [Thu, 13 Nov 2014 11:54:54 +0000 (12:54 +0100)]
update cer-id definition

10 years agosoftwires: avoid unnecessary allocations
Steven Barth [Sat, 25 Oct 2014 10:37:01 +0000 (12:37 +0200)]
softwires: avoid unnecessary allocations

10 years agoMerge pull request #24 from themiron/master
sbyx [Fri, 10 Oct 2014 14:25:10 +0000 (16:25 +0200)]
Merge pull request #24 from themiron/master

Fix parsing empty IA_NA, IA_PD and invalid IA_ADDR options

10 years agoFix parsing empty IA_NA, IA_PD and invalid IA_ADDR options
Vladislav Grishenko [Fri, 10 Oct 2014 12:18:42 +0000 (18:18 +0600)]
Fix parsing empty IA_NA, IA_PD and invalid IA_ADDR options

10 years agoMerge pull request #23 from dedeckeh/bugfixes
sbyx [Wed, 8 Oct 2014 13:59:44 +0000 (15:59 +0200)]
Merge pull request #23 from dedeckeh/bugfixes

odhcp6c: Set bound state true before script_call in statefull mode

10 years agoodhcp6c: Set bound state true before script_call in statefull mode
Hans Dedecker [Wed, 8 Oct 2014 13:43:21 +0000 (15:43 +0200)]
odhcp6c: Set bound state true before script_call in statefull mode

10 years agoscript: don't leak IA_PD / IA_NA if not yet bound
Steven Barth [Wed, 8 Oct 2014 13:02:27 +0000 (15:02 +0200)]
script: don't leak IA_PD / IA_NA if not yet bound

10 years agoEnsure signal-safety of signal handlers
Steven Barth [Wed, 8 Oct 2014 09:57:07 +0000 (11:57 +0200)]
Ensure signal-safety of signal handlers

10 years agoExport DHCPv6 server address to env
Steven Barth [Mon, 6 Oct 2014 08:29:43 +0000 (10:29 +0200)]
Export DHCPv6 server address to env

10 years agoSend RS alternatingly with and without source MAC
Steven Barth [Sat, 27 Sep 2014 16:54:43 +0000 (18:54 +0200)]
Send RS alternatingly with and without source MAC

10 years agoEnable softwire-support by default
Steven Barth [Mon, 25 Aug 2014 06:08:56 +0000 (08:08 +0200)]
Enable softwire-support by default

10 years agoAlso test for correct IA-ID for IA_NA
Steven Barth [Fri, 22 Aug 2014 14:09:34 +0000 (16:09 +0200)]
Also test for correct IA-ID for IA_NA

10 years agoia_na: use big-endian 1 as IAID
Steven Barth [Fri, 22 Aug 2014 14:07:37 +0000 (16:07 +0200)]
ia_na: use big-endian 1 as IAID

10 years agoRemove BFD from master-branch (kept in BFD-branch)
Steven Barth [Wed, 13 Aug 2014 11:30:42 +0000 (13:30 +0200)]
Remove BFD from master-branch (kept in BFD-branch)

10 years agoSend router solicitations with source link-layer address
Steven Barth [Mon, 21 Jul 2014 10:10:38 +0000 (12:10 +0200)]
Send router solicitations with source link-layer address

10 years agoFilter FQDN as well
Steven Barth [Fri, 30 May 2014 14:51:22 +0000 (16:51 +0200)]
Filter FQDN as well

10 years agoImprove filter
Steven Barth [Fri, 30 May 2014 14:49:05 +0000 (16:49 +0200)]
Improve filter

10 years agofilter DNS-domain from passthru
Steven Barth [Fri, 23 May 2014 06:29:34 +0000 (08:29 +0200)]
filter DNS-domain from passthru

10 years agoAdd support for DHCPv6 option passthru
Steven Barth [Fri, 23 May 2014 06:15:49 +0000 (08:15 +0200)]
Add support for DHCPv6 option passthru

10 years agoAdd MAPE / MAPT / LW4O6 to Readme
Steven Barth [Thu, 8 May 2014 09:12:43 +0000 (11:12 +0200)]
Add MAPE / MAPT / LW4O6 to Readme

10 years agosoftwire: fix DMR parsing
Steven Barth [Thu, 8 May 2014 09:06:32 +0000 (11:06 +0200)]
softwire: fix DMR parsing

10 years agoFix compiler warning
Steven Barth [Wed, 30 Apr 2014 15:49:32 +0000 (17:49 +0200)]
Fix compiler warning

10 years agoMAP: export type value in rules
Steven Barth [Wed, 30 Apr 2014 15:46:02 +0000 (17:46 +0200)]
MAP: export type value in rules

10 years agoFix MAP parameter parsing
Steven Barth [Wed, 30 Apr 2014 15:39:15 +0000 (17:39 +0200)]
Fix MAP parameter parsing

10 years agoIgnore multiple MAP-E instances for now and output DMR / BR for every rule
Steven Barth [Mon, 28 Apr 2014 17:39:10 +0000 (19:39 +0200)]
Ignore multiple MAP-E instances for now and output DMR / BR for every rule

10 years agoInitial support for MAP & LW4O6 provisioning
Steven Barth [Mon, 28 Apr 2014 09:37:13 +0000 (11:37 +0200)]
Initial support for MAP & LW4O6 provisioning

10 years agoFix fallout
Steven Barth [Wed, 9 Apr 2014 06:56:01 +0000 (08:56 +0200)]
Fix fallout

10 years agoRevert "Revert to old behaviour regarding information requests"
Steven Barth [Wed, 9 Apr 2014 06:47:53 +0000 (08:47 +0200)]
Revert "Revert to old behaviour regarding information requests"

This reverts commit c98181c4a48c57e405effd1dc9046aaaee6d480f.

10 years agoMerge pull request #19 from dedeckeh/bugfixes
sbyx [Thu, 3 Apr 2014 20:51:09 +0000 (22:51 +0200)]
Merge pull request #19 from dedeckeh/bugfixes

Add user-class option in help text and minor clean up

10 years agoAdd user-class option in help text and minor clean up
Hans Dedecker [Wed, 2 Apr 2014 20:30:48 +0000 (22:30 +0200)]
Add user-class option in help text and minor clean up

10 years agoCorrectly clear CER
Steven Barth [Tue, 1 Apr 2014 10:07:28 +0000 (12:07 +0200)]
Correctly clear CER

10 years agoDon't disable looping (meh)
Steven Barth [Tue, 1 Apr 2014 09:50:53 +0000 (11:50 +0200)]
Don't disable looping (meh)

10 years agoAdd initial support for CER-ID
Steven Barth [Sun, 30 Mar 2014 17:51:56 +0000 (19:51 +0200)]
Add initial support for CER-ID

10 years agoStop rebinding when all IAs are lost
Steven Barth [Mon, 24 Mar 2014 08:37:36 +0000 (09:37 +0100)]
Stop rebinding when all IAs are lost

10 years agoFix building with clang 3.4
Steven Barth [Tue, 18 Mar 2014 13:39:22 +0000 (14:39 +0100)]
Fix building with clang 3.4

10 years agoFix HMAC-MD5 verify in reconfigure
Steven Barth [Tue, 11 Mar 2014 08:18:32 +0000 (09:18 +0100)]
Fix HMAC-MD5 verify in reconfigure

10 years agofix integer overflow after 50 days (thx Hauke Mehrtens)
Steven Barth [Fri, 7 Mar 2014 09:33:49 +0000 (10:33 +0100)]
fix integer overflow after 50 days (thx Hauke Mehrtens)

10 years agora: don't set nd_ra_{reachable,retransmit} to 0
Steven Barth [Wed, 5 Mar 2014 08:11:24 +0000 (09:11 +0100)]
ra: don't set nd_ra_{reachable,retransmit} to 0

10 years agoSet default for min-update-interval to 30
Steven Barth [Wed, 5 Mar 2014 08:06:29 +0000 (09:06 +0100)]
Set default for min-update-interval to 30

10 years agoMerge pull request #18 from kaspar030/rebase
sbyx [Tue, 4 Mar 2014 17:21:04 +0000 (18:21 +0100)]
Merge pull request #18 from kaspar030/rebase

add option to specify minimum interval for accepting RA or DHCP updates.

10 years agoadd option to specify minimum interval for accepting RA or DHCP updates.
Kaspar Schleiser [Tue, 4 Mar 2014 15:29:02 +0000 (16:29 +0100)]
add option to specify minimum interval for accepting RA or DHCP updates.

This was fixed to 60s. Add '-m <seconds>' option to change default time.

10 years agoFix invalid use of open()
Steven Barth [Sat, 1 Mar 2014 12:31:33 +0000 (13:31 +0100)]
Fix invalid use of open()

10 years agoMake hex-string say base-16 encoded in help
Steven Barth [Wed, 19 Feb 2014 08:14:09 +0000 (09:14 +0100)]
Make hex-string say base-16 encoded in help

10 years agoReintroduce Reconfigure-Accept in Request-Message
Steven Barth [Mon, 17 Feb 2014 20:18:49 +0000 (21:18 +0100)]
Reintroduce Reconfigure-Accept in Request-Message

10 years agoMerge pull request #16 from kaspar030/use_enum_for_iov
sbyx [Wed, 12 Feb 2014 13:51:54 +0000 (14:51 +0100)]
Merge pull request #16 from kaspar030/use_enum_for_iov

use enum to specify order and indexes of iov struct in dhcp_send().