diff options
| -rw-r--r-- | ip.h | 25 | ||||
| -rw-r--r-- | tap.c | 4 | ||||
| -rw-r--r-- | tcp.c | 4 |
3 files changed, 27 insertions, 6 deletions
@@ -91,6 +91,31 @@ 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) + */ +/* cppcheck-suppress unusedFunction */ +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); @@ -241,9 +241,7 @@ static void *tap_push_ip6h(struct ipv6hdr *ip6h, ip6h->hop_limit = 255; ip6h->saddr = *src; ip6h->daddr = *dst; - ip6h->flow_lbl[0] = (flow >> 16) & 0xf; - ip6h->flow_lbl[1] = (flow >> 8) & 0xff; - ip6h->flow_lbl[2] = (flow >> 0) & 0xff; + ip6_set_flow_lbl(ip6h, flow); return ip6h + 1; } @@ -963,9 +963,7 @@ void tcp_fill_headers(const struct tcp_tap_conn *conn, ip6h->version = 6; ip6h->nexthdr = IPPROTO_TCP; - ip6h->flow_lbl[0] = (conn->sock >> 16) & 0xf; - ip6h->flow_lbl[1] = (conn->sock >> 8) & 0xff; - ip6h->flow_lbl[2] = (conn->sock >> 0) & 0xff; + ip6_set_flow_lbl(ip6h, conn->sock); if (!no_tcp_csum) { psum = proto_ipv6_header_psum(l4len, IPPROTO_TCP, |