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| author | Steven Barth <steven@midlink.org> | 2014-02-05 16:41:51 +0100 |
|---|---|---|
| committer | Steven Barth <steven@midlink.org> | 2014-02-05 16:41:51 +0100 |
| commit | b618ad5373ae619e3d01a49f2c672a8cc1dc59a6 (patch) | |
| tree | 9cc63aac435c10799fcde7e459fb19f33b593087 | |
| parent | eaa9fbea30a5c6de93b89b0acdb2ac856d4c9bcf (diff) | |
Fix homenet filter
| -rw-r--r-- | src/dhcpv6.c | 9 | ||||
| -rw-r--r-- | src/dhcpv6.h | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/src/dhcpv6.c b/src/dhcpv6.c index 9b802c4..bf48d78 100644 --- a/src/dhcpv6.c +++ b/src/dhcpv6.c @@ -22,6 +22,8 @@ #include "odhcpd.h" #include "dhcpv6.h" +static const char *excluded_class = "HOMENET"; + static void relay_client_request(struct sockaddr_in6 *source, const void *data, size_t len, struct interface *iface); @@ -275,6 +277,13 @@ static void handle_client_request(void *addr, void *data, size_t len, if (olen != ntohs(dest.serverid_length) || memcmp(odata, &dest.duid_type, olen)) return; // Not for us + } else if (otype == DHCPV6_OPT_USER_CLASS) { + uint8_t *c = odata, *cend = &odata[olen]; + for (; &c[2] <= cend && &c[2 + (c[0] << 8) + c[1]] <= cend; c = &c[2 + (c[0] << 8) + c[1]]) { + size_t elen = strlen(excluded_class); + if (((((size_t)c[0]) << 8) | c[1]) == elen && !memcmp(&c[2], excluded_class, elen)) + return; // Ignore from homenet + } } } diff --git a/src/dhcpv6.h b/src/dhcpv6.h index 7b3b484..9b38283 100644 --- a/src/dhcpv6.h +++ b/src/dhcpv6.h @@ -44,6 +44,7 @@ #define DHCPV6_OPT_STATUS 13 #define DHCPV6_OPT_RELAY_MSG 9 #define DHCPV6_OPT_AUTH 11 +#define DHCPV6_OPT_USER_CLASS 15 #define DHCPV6_OPT_INTERFACE_ID 18 #define DHCPV6_OPT_RECONF_MSG 19 #define DHCPV6_OPT_RECONF_ACCEPT 20 |