diff options
Diffstat (limited to 'ip.h')
| -rw-r--r-- | ip.h | 34 |
1 files changed, 33 insertions, 1 deletions
@@ -36,13 +36,14 @@ .tos = 0, \ .tot_len = 0, \ .id = 0, \ - .frag_off = 0, \ + .frag_off = htons(IP_DF), \ .ttl = 0xff, \ .protocol = (proto), \ .saddr = 0, \ .daddr = 0, \ } #define L2_BUF_IP4_PSUM(proto) ((uint32_t)htons_constant(0x4500) + \ + (uint32_t)htons_constant(IP_DF) + \ (uint32_t)htons(0xff00 | (proto))) @@ -90,6 +91,30 @@ struct ipv6_opt_hdr { */ } __attribute__((packed)); /* required for some archs */ +/** + * ip6_set_flow_lbl() - Set flow label in an IPv6 header + * @ip6h: Pointer to IPv6 header, updated + * @flow: Set @ip6h flow label to the low 20 bits of this integer + */ +static inline void ip6_set_flow_lbl(struct ipv6hdr *ip6h, uint32_t flow) +{ + ip6h->flow_lbl[0] = (flow >> 16) & 0xf; + ip6h->flow_lbl[1] = (flow >> 8) & 0xff; + ip6h->flow_lbl[2] = (flow >> 0) & 0xff; +} + +/** ip6_get_flow_lbl() - Get flow label from an IPv6 header + * @ip6h: Pointer to IPv6 header + * + * Return: flow label from @ip6h as an integer (<= 20 bits) + */ +static inline uint32_t ip6_get_flow_lbl(const struct ipv6hdr *ip6h) +{ + return (ip6h->flow_lbl[0] & 0xf) << 16 | + ip6h->flow_lbl[1] << 8 | + ip6h->flow_lbl[2]; +} + char *ipv6_l4hdr(const struct pool *p, int idx, size_t offset, uint8_t *proto, size_t *dlen); @@ -104,4 +129,11 @@ static const struct in6_addr in6addr_ll_all_nodes = { /* IPv4 Limited Broadcast (RFC 919, Section 7), 255.255.255.255 */ static const struct in_addr in4addr_broadcast = { 0xffffffff }; +#ifndef IPV4_MIN_MTU +#define IPV4_MIN_MTU 68 +#endif +#ifndef IPV6_MIN_MTU +#define IPV6_MIN_MTU 1280 +#endif + #endif /* IP_H */ |