diff options
| -rw-r--r-- | include/net/6lowpan.h | 8 | ||||
| -rw-r--r-- | net/6lowpan/iphc.c | 2 |
2 files changed, 9 insertions, 1 deletions
diff --git a/include/net/6lowpan.h b/include/net/6lowpan.h index 07db532..aa5a823 100644 --- a/include/net/6lowpan.h +++ b/include/net/6lowpan.h @@ -64,12 +64,20 @@ #define EUI64_ADDR_LEN 8 #define LOWPAN_NHC_MAX_ID_LEN 1 +/* Maximum next header compression length which we currently support inclusive + * possible inline data. + */ +#define LOWPAN_NHC_MAX_HDR_LEN (sizeof(struct udphdr)) /* Max IPHC Header len without IPv6 hdr specific inline data. * Useful for getting the "extra" bytes we need at worst case compression. * * LOWPAN_IPHC + CID + LOWPAN_NHC_MAX_ID_LEN */ #define LOWPAN_IPHC_MAX_HEADER_LEN (2 + 1 + LOWPAN_NHC_MAX_ID_LEN) +/* Maximum worst case IPHC header buffer size */ +#define LOWPAN_IPHC_MAX_HC_BUF_LEN (sizeof(struct ipv6hdr) + \ + LOWPAN_IPHC_MAX_HEADER_LEN + \ + LOWPAN_NHC_MAX_HDR_LEN) /* * ipv6 address based on mac diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c index 78c8a49..dd5f27d 100644 --- a/net/6lowpan/iphc.c +++ b/net/6lowpan/iphc.c @@ -429,7 +429,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev, { u8 tmp, iphc0, iphc1, *hc_ptr; struct ipv6hdr *hdr; - u8 head[100] = {}; + u8 head[LOWPAN_IPHC_MAX_HC_BUF_LEN] = {}; int ret, addr_type; if (type != ETH_P_IPV6) |
