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| author | Jukka Rissanen <jukka.rissanen@linux.intel.com> | 2012-01-05 13:38:09 +0200 |
|---|---|---|
| committer | Daniel Wagner <daniel.wagner@bmw-carit.de> | 2012-01-05 13:17:26 +0100 |
| commit | 195007a210055b96f42f29348cbce02915dea242 (patch) | |
| tree | de2dc353c33f9f8999d0df16a87fe15da379ad1b /gdhcp/common.c | |
| parent | 60bc9d2cdd88171bf10a545b46f49b5e7c6415ab (diff) | |
| download | connman-195007a210055b96f42f29348cbce02915dea242.tar.gz connman-195007a210055b96f42f29348cbce02915dea242.tar.bz2 connman-195007a210055b96f42f29348cbce02915dea242.zip | |
dhcpv6: Initial stateful DHCPv6 support.
This patch contains solicitation message support.
Diffstat (limited to 'gdhcp/common.c')
| -rw-r--r-- | gdhcp/common.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gdhcp/common.c b/gdhcp/common.c index 46cf5f6d..c511e26d 100644 --- a/gdhcp/common.c +++ b/gdhcp/common.c @@ -188,6 +188,31 @@ uint8_t *dhcpv6_get_option(struct dhcpv6_packet *packet, uint16_t pkt_len, return found; } +uint8_t *dhcpv6_get_sub_option(unsigned char *option, uint16_t max_len, + uint16_t *option_code, uint16_t *option_len) +{ + int rem; + uint16_t code, len; + + rem = max_len - 2 - 2; + + if (rem <= 0) + /* Bad option */ + return NULL; + + code = option[0] << 8 | option[1]; + len = option[2] << 8 | option[3]; + + rem -= len; + if (rem < 0) + return NULL; + + *option_code = code; + *option_len = len; + + return &option[4]; +} + /* * Add an option (supplied in binary form) to the options. * Option format: [code][len][data1][data2]..[dataLEN] |