6lowpan: iphc: cleanup use of lowpan_push_hc_data

This patch uses the lowpan_push_hc_data functions in several places
where we can use it. The lowpan_push_hc_data was introduced in some
previous patches.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c
index 0376684f28d00cd255b697dceeccc906062cd51d..636edd0f3724331766fc4149b775967907f595f1 100644 (file)
--- a/net/6lowpan/iphc.c
+++ b/net/6lowpan/iphc.c
@@ -532,15 +532,13 @@ static u8 lowpan_compress_addr_64(u8 **hc_ptr, u8 shift,
                pr_debug("address compression 0 bits\n");
        } else if (lowpan_is_iid_16_bit_compressable(ipaddr)) {
                /* compress IID to 16 bits xxxx::XXXX */
-               memcpy(*hc_ptr, &ipaddr->s6_addr16[7], 2);
-               *hc_ptr += 2;
+               lowpan_push_hc_data(hc_ptr, &ipaddr->s6_addr16[7], 2);
                val = 2; /* 16-bits */
                raw_dump_inline(NULL, "Compressed ipv6 addr is (16 bits)",
                                *hc_ptr - 2, 2);
        } else {
                /* do not compress IID => xxxx::IID */
-               memcpy(*hc_ptr, &ipaddr->s6_addr16[4], 8);
-               *hc_ptr += 8;
+               lowpan_push_hc_data(hc_ptr, &ipaddr->s6_addr16[4], 8);
                val = 1; /* 64-bits */
                raw_dump_inline(NULL, "Compressed ipv6 addr is (64 bits)",
                                *hc_ptr - 8, 8);
@@ -696,10 +694,9 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
        if (hdr->nexthdr == UIP_PROTO_UDP)
                iphc0 |= LOWPAN_IPHC_NH_C;
 
-       if ((iphc0 & LOWPAN_IPHC_NH_C) == 0) {
-               *hc_ptr = hdr->nexthdr;
-               hc_ptr += 1;
-       }
+       if ((iphc0 & LOWPAN_IPHC_NH_C) == 0)
+               lowpan_push_hc_data(&hc_ptr, &hdr->nexthdr,
+                                   sizeof(hdr->nexthdr));
 
        /*
         * Hop limit
@@ -719,9 +716,8 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
                iphc0 |= LOWPAN_IPHC_TTL_255;
                break;
        default:
-               *hc_ptr = hdr->hop_limit;
-               hc_ptr += 1;
-               break;
+               lowpan_push_hc_data(&hc_ptr, &hdr->hop_limit,
+                                   sizeof(hdr->hop_limit));
        }
 
        /* source address compression */
@@ -736,8 +732,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
                        "iphc1 0x%02x\n", &hdr->saddr, iphc1);
        } else {
                pr_debug("send the full source address\n");
-               memcpy(hc_ptr, &hdr->saddr.s6_addr16[0], 16);
-               hc_ptr += 16;
+               lowpan_push_hc_data(&hc_ptr, &hdr->saddr.s6_addr[0], 16);
        }
 
        /* destination address compression */
@@ -748,27 +743,28 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
                        pr_debug("compressed to 1 octet\n");
                        iphc1 |= LOWPAN_IPHC_DAM_11;
                        /* use last byte */
-                       *hc_ptr = hdr->daddr.s6_addr[15];
-                       hc_ptr += 1;
+                       lowpan_push_hc_data(&hc_ptr,
+                                           &hdr->daddr.s6_addr[15], 1);
                } else if (lowpan_is_mcast_addr_compressable32(&hdr->daddr)) {
                        pr_debug("compressed to 4 octets\n");
                        iphc1 |= LOWPAN_IPHC_DAM_10;
                        /* second byte + the last three */
-                       *hc_ptr = hdr->daddr.s6_addr[1];
-                       memcpy(hc_ptr + 1, &hdr->daddr.s6_addr[13], 3);
-                       hc_ptr += 4;
+                       lowpan_push_hc_data(&hc_ptr,
+                                           &hdr->daddr.s6_addr[1], 1);
+                       lowpan_push_hc_data(&hc_ptr,
+                                           &hdr->daddr.s6_addr[13], 3);
                } else if (lowpan_is_mcast_addr_compressable48(&hdr->daddr)) {
                        pr_debug("compressed to 6 octets\n");
                        iphc1 |= LOWPAN_IPHC_DAM_01;
                        /* second byte + the last five */
-                       *hc_ptr = hdr->daddr.s6_addr[1];
-                       memcpy(hc_ptr + 1, &hdr->daddr.s6_addr[11], 5);
-                       hc_ptr += 6;
+                       lowpan_push_hc_data(&hc_ptr,
+                                           &hdr->daddr.s6_addr[1], 1);
+                       lowpan_push_hc_data(&hc_ptr,
+                                           &hdr->daddr.s6_addr[11], 5);
                } else {
                        pr_debug("using full address\n");
                        iphc1 |= LOWPAN_IPHC_DAM_00;
-                       memcpy(hc_ptr, &hdr->daddr.s6_addr[0], 16);
-                       hc_ptr += 16;
+                       lowpan_push_hc_data(&hc_ptr, hdr->daddr.s6_addr, 16);
                }
        } else {
                /* TODO: context lookup */
@@ -779,8 +775,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
                                "iphc1 0x%02x\n", &hdr->daddr, iphc1);
                } else {
                        pr_debug("dest address unicast %pI6c\n", &hdr->daddr);
-                       memcpy(hc_ptr, &hdr->daddr.s6_addr16[0], 16);
-                       hc_ptr += 16;
+                       lowpan_push_hc_data(&hc_ptr, hdr->daddr.s6_addr, 16);
                }
        }