diff options
Diffstat (limited to 'net/ieee802154')
| -rw-r--r-- | net/ieee802154/6lowpan_iphc.c | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/net/ieee802154/6lowpan_iphc.c b/net/ieee802154/6lowpan_iphc.c index 88e7da599558..77c0366a3b47 100644 --- a/net/ieee802154/6lowpan_iphc.c +++ b/net/ieee802154/6lowpan_iphc.c @@ -541,42 +541,45 @@ static u8 lowpan_compress_addr_64(u8 **hc06_ptr, u8 shift, static void compress_udp_header(u8 **hc06_ptr, struct sk_buff *skb) { struct udphdr *uh = udp_hdr(skb); + u8 tmp; if (((uh->source & LOWPAN_NHC_UDP_4BIT_MASK) == LOWPAN_NHC_UDP_4BIT_PORT) && ((uh->dest & LOWPAN_NHC_UDP_4BIT_MASK) == LOWPAN_NHC_UDP_4BIT_PORT)) { pr_debug("UDP header: both ports compression to 4 bits\n"); - **hc06_ptr = LOWPAN_NHC_UDP_CS_P_11; - **(hc06_ptr + 1) = /* subtraction is faster */ + tmp = LOWPAN_NHC_UDP_CS_P_11; + lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp)); + tmp = /* subtraction is faster */ (u8)((uh->dest - LOWPAN_NHC_UDP_4BIT_PORT) + ((uh->source & LOWPAN_NHC_UDP_4BIT_PORT) << 4)); - *hc06_ptr += 2; + lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp)); } else if ((uh->dest & LOWPAN_NHC_UDP_8BIT_MASK) == LOWPAN_NHC_UDP_8BIT_PORT) { pr_debug("UDP header: remove 8 bits of dest\n"); - **hc06_ptr = LOWPAN_NHC_UDP_CS_P_01; - memcpy(*hc06_ptr + 1, &uh->source, 2); - **(hc06_ptr + 3) = (u8)(uh->dest - LOWPAN_NHC_UDP_8BIT_PORT); - *hc06_ptr += 4; + tmp = LOWPAN_NHC_UDP_CS_P_01; + lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp)); + lowpan_push_hc_data(hc06_ptr, &uh->source, sizeof(uh->source)); + tmp = (u8)(uh->dest - LOWPAN_NHC_UDP_8BIT_PORT); + lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp)); } else if ((uh->source & LOWPAN_NHC_UDP_8BIT_MASK) == LOWPAN_NHC_UDP_8BIT_PORT) { pr_debug("UDP header: remove 8 bits of source\n"); - **hc06_ptr = LOWPAN_NHC_UDP_CS_P_10; - memcpy(*hc06_ptr + 1, &uh->dest, 2); - **(hc06_ptr + 3) = (u8)(uh->source - LOWPAN_NHC_UDP_8BIT_PORT); - *hc06_ptr += 4; + tmp = LOWPAN_NHC_UDP_CS_P_10; + lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp)); + lowpan_push_hc_data(hc06_ptr, &uh->dest, sizeof(uh->dest)); + tmp = (u8)(uh->source - LOWPAN_NHC_UDP_8BIT_PORT); + lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp)); } else { pr_debug("UDP header: can't compress\n"); - **hc06_ptr = LOWPAN_NHC_UDP_CS_P_00; - memcpy(*hc06_ptr + 1, &uh->source, 2); - memcpy(*hc06_ptr + 3, &uh->dest, 2); - *hc06_ptr += 5; + tmp = LOWPAN_NHC_UDP_CS_P_00; + lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp)); + lowpan_push_hc_data(hc06_ptr, &uh->source, sizeof(uh->source)); + lowpan_push_hc_data(hc06_ptr, &uh->dest, sizeof(uh->dest)); } /* checksum is always inline */ - memcpy(*hc06_ptr, &uh->check, 2); - *hc06_ptr += 2; + lowpan_push_hc_data(hc06_ptr, &uh->check, sizeof(uh->check)); /* skip the UDP header */ skb_pull(skb, sizeof(struct udphdr)); |
