1 files changed, 52 insertions, 62 deletions

diff --git a/net/ieee802154/6lowpan_iphc.c b/net/ieee802154/6lowpan_iphc.c
index 211b5686d71..a1b7117a960 100644
--- a/net/ieee802154/6lowpan_iphc.c
+++ b/net/ieee802154/6lowpan_iphc.c
@@ -3,8 +3,7 @@
  * written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
  */
 
-/*
- * Based on patches from Jon Smirl <jonsmirl@gmail.com>
+/* Based on patches from Jon Smirl <jonsmirl@gmail.com>
  * Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -58,16 +57,15 @@
 #include <net/ipv6.h>
 #include <net/af_ieee802154.h>
 
-/*
- * Uncompress address function for source and
+/* Uncompress address function for source and
  * destination address(non-multicast).
  *
  * address_mode is sam value or dam value.
  */
 static int uncompress_addr(struct sk_buff *skb,
-				struct in6_addr *ipaddr, const u8 address_mode,
-				const u8 *lladdr, const u8 addr_type,
-				const u8 addr_len)
+			   struct in6_addr *ipaddr, const u8 address_mode,
+			   const u8 *lladdr, const u8 addr_type,
+			   const u8 addr_len)
 {
 	bool fail;
 
@@ -140,13 +138,12 @@ static int uncompress_addr(struct sk_buff *skb,
 	return 0;
 }
 
-/*
- * Uncompress address function for source context
+/* Uncompress address function for source context
  * based address(non-multicast).
  */
 static int uncompress_context_based_src_addr(struct sk_buff *skb,
-						struct in6_addr *ipaddr,
-						const u8 sam)
+					     struct in6_addr *ipaddr,
+					     const u8 sam)
 {
 	switch (sam) {
 	case LOWPAN_IPHC_ADDR_00:
@@ -175,13 +172,13 @@ static int uncompress_context_based_src_addr(struct sk_buff *skb,
 }
 
 static int skb_deliver(struct sk_buff *skb, struct ipv6hdr *hdr,
-		struct net_device *dev, skb_delivery_cb deliver_skb)
+		       struct net_device *dev, skb_delivery_cb deliver_skb)
 {
 	struct sk_buff *new;
 	int stat;
 
-	new = skb_copy_expand(skb, sizeof(struct ipv6hdr), skb_tailroom(skb),
-								GFP_ATOMIC);
+	new = skb_copy_expand(skb, sizeof(struct ipv6hdr),
+			      skb_tailroom(skb), GFP_ATOMIC);
 	kfree_skb(skb);
 
 	if (!new)
@@ -196,7 +193,7 @@ static int skb_deliver(struct sk_buff *skb, struct ipv6hdr *hdr,
 	new->dev = dev;
 
 	raw_dump_table(__func__, "raw skb data dump before receiving",
-			new->data, new->len);
+		       new->data, new->len);
 
 	stat = deliver_skb(new, dev);
 
@@ -210,8 +207,8 @@ static int skb_deliver(struct sk_buff *skb, struct ipv6hdr *hdr,
  */
 static int
 lowpan_uncompress_multicast_daddr(struct sk_buff *skb,
-		struct in6_addr *ipaddr,
-		const u8 dam)
+				  struct in6_addr *ipaddr,
+				  const u8 dam)
 {
 	bool fail;
 
@@ -300,7 +297,6 @@ uncompress_udp_header(struct sk_buff *skb, struct udphdr *uh)
 		default:
 			pr_debug("ERROR: unknown UDP format\n");
 			goto err;
-			break;
 		}
 
 		pr_debug("uncompressed UDP ports: src = %d, dst = %d\n",
@@ -314,8 +310,7 @@ uncompress_udp_header(struct sk_buff *skb, struct udphdr *uh)
 			fail |= lowpan_fetch_skb(skb, &uh->check, 2);
 		}
 
-		/*
-		 * UDP lenght needs to be infered from the lower layers
+		/* UDP lenght needs to be infered from the lower layers
 		 * here, we obtain the hint from the remaining size of the
 		 * frame
 		 */
@@ -338,16 +333,17 @@ err:
 static const u8 lowpan_ttl_values[] = { 0, 1, 64, 255 };
 
 int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
-		const u8 *saddr, const u8 saddr_type, const u8 saddr_len,
-		const u8 *daddr, const u8 daddr_type, const u8 daddr_len,
-		u8 iphc0, u8 iphc1, skb_delivery_cb deliver_skb)
+			const u8 *saddr, const u8 saddr_type,
+			const u8 saddr_len, const u8 *daddr,
+			const u8 daddr_type, const u8 daddr_len,
+			u8 iphc0, u8 iphc1, skb_delivery_cb deliver_skb)
 {
 	struct ipv6hdr hdr = {};
 	u8 tmp, num_context = 0;
 	int err;
 
 	raw_dump_table(__func__, "raw skb data dump uncompressed",
-				skb->data, skb->len);
+		       skb->data, skb->len);
 
 	/* another if the CID flag is set */
 	if (iphc1 & LOWPAN_IPHC_CID) {
@@ -360,8 +356,7 @@ int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
 
 	/* Traffic Class and Flow Label */
 	switch ((iphc0 & LOWPAN_IPHC_TF) >> 3) {
-	/*
-	 * Traffic Class and FLow Label carried in-line
+	/* Traffic Class and FLow Label carried in-line
 	 * ECN + DSCP + 4-bit Pad + Flow Label (4 bytes)
 	 */
 	case 0: /* 00b */
@@ -374,8 +369,7 @@ int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
 		hdr.flow_lbl[0] = ((tmp >> 2) & 0x30) | (tmp << 6) |
 					(hdr.flow_lbl[0] & 0x0f);
 		break;
-	/*
-	 * Traffic class carried in-line
+	/* Traffic class carried in-line
 	 * ECN + DSCP (1 byte), Flow Label is elided
 	 */
 	case 2: /* 10b */
@@ -385,8 +379,7 @@ int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
 		hdr.priority = ((tmp >> 2) & 0x0f);
 		hdr.flow_lbl[0] = ((tmp << 6) & 0xC0) | ((tmp >> 2) & 0x30);
 		break;
-	/*
-	 * Flow Label carried in-line
+	/* Flow Label carried in-line
 	 * ECN + 2-bit Pad + Flow Label (3 bytes), DSCP is elided
 	 */
 	case 1: /* 01b */
@@ -415,9 +408,9 @@ int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
 	}
 
 	/* Hop Limit */
-	if ((iphc0 & 0x03) != LOWPAN_IPHC_TTL_I)
+	if ((iphc0 & 0x03) != LOWPAN_IPHC_TTL_I) {
 		hdr.hop_limit = lowpan_ttl_values[iphc0 & 0x03];
-	else {
+	} else {
 		if (lowpan_fetch_skb_u8(skb, &(hdr.hop_limit)))
 			goto drop;
 	}
@@ -429,12 +422,12 @@ int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
 		/* Source address context based uncompression */
 		pr_debug("SAC bit is set. Handle context based source address.\n");
 		err = uncompress_context_based_src_addr(
-				skb, &hdr.saddr, tmp);
+						skb, &hdr.saddr, tmp);
 	} else {
 		/* Source address uncompression */
 		pr_debug("source address stateless compression\n");
 		err = uncompress_addr(skb, &hdr.saddr, tmp, saddr,
-					saddr_type, saddr_len);
+				      saddr_type, saddr_len);
 	}
 
 	/* Check on error of previous branch */
@@ -457,9 +450,9 @@ int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
 		}
 	} else {
 		err = uncompress_addr(skb, &hdr.daddr, tmp, daddr,
-					daddr_type, daddr_len);
+				      daddr_type, daddr_len);
 		pr_debug("dest: stateless compression mode %d dest %pI6c\n",
-			tmp, &hdr.daddr);
+			 tmp, &hdr.daddr);
 		if (err)
 			goto drop;
 	}
@@ -468,11 +461,11 @@ int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
 	if (iphc0 & LOWPAN_IPHC_NH_C) {
 		struct udphdr uh;
 		struct sk_buff *new;
+
 		if (uncompress_udp_header(skb, &uh))
 			goto drop;
 
-		/*
-		 * replace the compressed UDP head by the uncompressed UDP
+		/* replace the compressed UDP head by the uncompressed UDP
 		 * header
 		 */
 		new = skb_copy_expand(skb, sizeof(struct udphdr),
@@ -489,7 +482,7 @@ int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
 		skb_copy_to_linear_data(skb, &uh, sizeof(struct udphdr));
 
 		raw_dump_table(__func__, "raw UDP header dump",
-				      (u8 *)&uh, sizeof(uh));
+			       (u8 *)&uh, sizeof(uh));
 
 		hdr.nexthdr = UIP_PROTO_UDP;
 	}
@@ -504,8 +497,8 @@ int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
 		hdr.version, ntohs(hdr.payload_len), hdr.nexthdr,
 		hdr.hop_limit, &hdr.daddr);
 
-	raw_dump_table(__func__, "raw header dump", (u8 *)&hdr,
-							sizeof(hdr));
+	raw_dump_table(__func__, "raw header dump",
+		       (u8 *)&hdr, sizeof(hdr));
 
 	return skb_deliver(skb, &hdr, dev, deliver_skb);
 
@@ -516,8 +509,8 @@ drop:
 EXPORT_SYMBOL_GPL(lowpan_process_data);
 
 static u8 lowpan_compress_addr_64(u8 **hc06_ptr, u8 shift,
-				const struct in6_addr *ipaddr,
-				const unsigned char *lladdr)
+				  const struct in6_addr *ipaddr,
+				  const unsigned char *lladdr)
 {
 	u8 val = 0;
 
@@ -530,14 +523,14 @@ static u8 lowpan_compress_addr_64(u8 **hc06_ptr, u8 shift,
 		*hc06_ptr += 2;
 		val = 2; /* 16-bits */
 		raw_dump_inline(NULL, "Compressed ipv6 addr is (16 bits)",
-			*hc06_ptr - 2, 2);
+				*hc06_ptr - 2, 2);
 	} else {
 		/* do not compress IID => xxxx::IID */
 		memcpy(*hc06_ptr, &ipaddr->s6_addr16[4], 8);
 		*hc06_ptr += 8;
 		val = 1; /* 64-bits */
 		raw_dump_inline(NULL, "Compressed ipv6 addr is (64 bits)",
-			*hc06_ptr - 8, 8);
+				*hc06_ptr - 8, 8);
 	}
 
 	return rol8(val, shift);
@@ -601,8 +594,8 @@ static void compress_udp_header(u8 **hc06_ptr, struct sk_buff *skb)
 }
 
 int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
-			unsigned short type, const void *_daddr,
-			const void *_saddr, unsigned int len)
+			   unsigned short type, const void *_daddr,
+			   const void *_saddr, unsigned int len)
 {
 	u8 tmp, iphc0, iphc1, *hc06_ptr;
 	struct ipv6hdr *hdr;
@@ -616,14 +609,13 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
 
 	pr_debug("IPv6 header dump:\n\tversion = %d\n\tlength  = %d\n"
 		 "\tnexthdr = 0x%02x\n\thop_lim = %d\n\tdest    = %pI6c\n",
-		hdr->version, ntohs(hdr->payload_len), hdr->nexthdr,
-		hdr->hop_limit, &hdr->daddr);
+		 hdr->version, ntohs(hdr->payload_len), hdr->nexthdr,
+		 hdr->hop_limit, &hdr->daddr);
 
 	raw_dump_table(__func__, "raw skb network header dump",
-		skb_network_header(skb), sizeof(struct ipv6hdr));
+		       skb_network_header(skb), sizeof(struct ipv6hdr));
 
-	/*
-	 * As we copy some bit-length fields, in the IPHC encoding bytes,
+	/* As we copy some bit-length fields, in the IPHC encoding bytes,
 	 * we sometimes use |=
 	 * If the field is 0, and the current bit value in memory is 1,
 	 * this does not work. We therefore reset the IPHC encoding here
@@ -639,11 +631,10 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
 			(unsigned char *)_daddr, IEEE802154_ADDR_LEN);
 
 	raw_dump_table(__func__,
-			"sending raw skb network uncompressed packet",
-			skb->data, skb->len);
+		       "sending raw skb network uncompressed packet",
+		       skb->data, skb->len);
 
-	/*
-	 * Traffic class, flow label
+	/* Traffic class, flow label
 	 * If flow label is 0, compress it. If traffic class is 0, compress it
 	 * We have to process both in the same time as the offset of traffic
 	 * class depends on the presence of version and flow label
@@ -654,11 +645,11 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
 	tmp = ((tmp & 0x03) << 6) | (tmp >> 2);
 
 	if (((hdr->flow_lbl[0] & 0x0F) == 0) &&
-	     (hdr->flow_lbl[1] == 0) && (hdr->flow_lbl[2] == 0)) {
+	    (hdr->flow_lbl[1] == 0) && (hdr->flow_lbl[2] == 0)) {
 		/* flow label can be compressed */
 		iphc0 |= LOWPAN_IPHC_FL_C;
 		if ((hdr->priority == 0) &&
-		   ((hdr->flow_lbl[0] & 0xF0) == 0)) {
+		    ((hdr->flow_lbl[0] & 0xF0) == 0)) {
 			/* compress (elide) all */
 			iphc0 |= LOWPAN_IPHC_TC_C;
 		} else {
@@ -669,7 +660,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
 	} else {
 		/* Flow label cannot be compressed */
 		if ((hdr->priority == 0) &&
-		   ((hdr->flow_lbl[0] & 0xF0) == 0)) {
+		    ((hdr->flow_lbl[0] & 0xF0) == 0)) {
 			/* compress only traffic class */
 			iphc0 |= LOWPAN_IPHC_TC_C;
 			*hc06_ptr = (tmp & 0xc0) | (hdr->flow_lbl[0] & 0x0F);
@@ -695,8 +686,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
 		hc06_ptr += 1;
 	}
 
-	/*
-	 * Hop limit
+	/* Hop limit
 	 * if 1:   compress, encoding is 01
 	 * if 64:  compress, encoding is 10
 	 * if 255: compress, encoding is 11
@@ -793,7 +783,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
 	pr_debug("header len %d skb %u\n", (int)(hc06_ptr - head), skb->len);
 
 	raw_dump_table(__func__, "raw skb data dump compressed",
-				skb->data, skb->len);
+		       skb->data, skb->len);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(lowpan_header_compress);