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Whitespace fixes

tags/v0.9.3
Michael Brown vor 18 Jahren
Ursprung
Commit
e04ea505c9
1 geänderte Dateien mit 125 neuen und 125 gelöschten Zeilen
  1. 125
    125
      src/net/ipv4.c

+ 125
- 125
src/net/ipv4.c Datei anzeigen

@@ -104,22 +104,22 @@ void del_ipv4_address ( struct net_device *netdev ) {
104 104
  */
105 105
 void ipv4_tx_csum ( struct pk_buff *pkb, uint8_t trans_proto ) {
106 106
 
107
-        struct iphdr *iphdr = pkb->data;
108
-        void *pshdr = malloc ( IP_PSHLEN );
109
-        void *csum_offset = iphdr + IP_HLEN + ( trans_proto == IP_UDP ? 6 : 16 );
110
-        int offset = 0;
111
-
112
-        /* Calculate pseudo header */
113
-        memcpy ( pshdr, &iphdr->src, sizeof ( in_addr ) );
114
-        offset += sizeof ( in_addr );
115
-        memcpy ( pshdr + offset, &iphdr->dest, sizeof ( in_addr ) );
116
-        offset += sizeof ( in_addr );
117
-        *( ( uint8_t* ) ( pshdr + offset++ ) ) = 0x00;
118
-        *( ( uint8_t* ) ( pshdr + offset++ ) ) = iphdr->protocol;
119
-        *( ( uint16_t* ) ( pshdr + offset ) ) = pkb_len ( pkb ) - IP_HLEN;
107
+	struct iphdr *iphdr = pkb->data;
108
+	void *pshdr = malloc ( IP_PSHLEN );
109
+	void *csum_offset = iphdr + IP_HLEN + ( trans_proto == IP_UDP ? 6 : 16 );
110
+	int offset = 0;
111
+
112
+	/* Calculate pseudo header */
113
+	memcpy ( pshdr, &iphdr->src, sizeof ( in_addr ) );
114
+	offset += sizeof ( in_addr );
115
+	memcpy ( pshdr + offset, &iphdr->dest, sizeof ( in_addr ) );
116
+	offset += sizeof ( in_addr );
117
+	*( ( uint8_t* ) ( pshdr + offset++ ) ) = 0x00;
118
+	*( ( uint8_t* ) ( pshdr + offset++ ) ) = iphdr->protocol;
119
+	*( ( uint16_t* ) ( pshdr + offset ) ) = pkb_len ( pkb ) - IP_HLEN;
120 120
 
121 121
 	/* Update the checksum value */
122
-        *( ( uint16_t* ) csum_offset ) = *( ( uint16_t* ) csum_offset ) + calc_chksum ( pshdr, IP_PSHLEN );
122
+	*( ( uint16_t* ) csum_offset ) = *( ( uint16_t* ) csum_offset ) + calc_chksum ( pshdr, IP_PSHLEN );
123 123
 }
124 124
 
125 125
 /**
@@ -173,7 +173,7 @@ int ipv4_uip_tx ( struct pk_buff *pkb ) {
173 173
 		/* Broadcast address */
174 174
 		ll_dest = netdev->ll_protocol->ll_broadcast;
175 175
 	} else if ( IN_MULTICAST ( next_hop.s_addr ) ) {
176
-		/* Special case: IPv4 multicast over Ethernet.  This
176
+		/* Special case: IPv4 multicast over Ethernet.	This
177 177
 		 * code may need to be generalised once we find out
178 178
 		 * what happens for other link layers.
179 179
 		 */
@@ -214,28 +214,28 @@ int ipv4_uip_tx ( struct pk_buff *pkb ) {
214 214
  */
215 215
 int ipv4_tx ( struct pk_buff *pkb, uint16_t trans_proto, struct in_addr *dest ) {
216 216
 	struct iphdr *iphdr = pkb_push ( pkb, IP_HLEN );
217
-        struct ipv4_miniroute *miniroute;
218
-        struct net_device *netdev = NULL;
219
-        struct in_addr next_hop;
220
-        struct in_addr source;
221
-        uint8_t ll_dest_buf[MAX_LL_ADDR_LEN];
222
-        const uint8_t *ll_dest = ll_dest_buf;
223
-        int rc;
224
-
225
-        /* Fill up the IP header, except source address */
226
-        iphdr->verhdrlen = ( IP_VER << 4 ) | ( IP_HLEN / 4 );	/* Version = 4, Header length = 5 */
227
-        iphdr->service = IP_TOS;                               	/* Service = 0, is not implemented */
228
-        iphdr->len = htons ( pkb_len ( pkb ) );                 /* Total packet length, in network byte order */
229
-        iphdr->ident = next_ident++;				/* Identification number */
230
-        iphdr->frags = 0;                                       /* Fragmentation is not implemented at the host */
231
-        iphdr->ttl = IP_TTL;                                    /* Time to live */
232
-        iphdr->protocol = trans_proto;                          /* Transport-layer protocol - IP_XXX */
217
+	struct ipv4_miniroute *miniroute;
218
+	struct net_device *netdev = NULL;
219
+	struct in_addr next_hop;
220
+	struct in_addr source;
221
+	uint8_t ll_dest_buf[MAX_LL_ADDR_LEN];
222
+	const uint8_t *ll_dest = ll_dest_buf;
223
+	int rc;
224
+
225
+	/* Fill up the IP header, except source address */
226
+	iphdr->verhdrlen = ( IP_VER << 4 ) | ( IP_HLEN / 4 );	/* Version = 4, Header length = 5 */
227
+	iphdr->service = IP_TOS;				/* Service = 0, is not implemented */
228
+	iphdr->len = htons ( pkb_len ( pkb ) );			/* Total packet length, in network byte order */
229
+	iphdr->ident = next_ident++;				/* Identification number */
230
+	iphdr->frags = 0;					/* Fragmentation is not implemented at the host */
231
+	iphdr->ttl = IP_TTL;					/* Time to live */
232
+	iphdr->protocol = trans_proto;				/* Transport-layer protocol - IP_XXX */
233 233
 
234 234
 	/* Calculate header checksum, in network byte order */
235
-        iphdr->chksum = 0;
236
-        iphdr->chksum = htons ( calc_chksum ( iphdr, IP_HLEN ) );
235
+	iphdr->chksum = 0;
236
+	iphdr->chksum = htons ( calc_chksum ( iphdr, IP_HLEN ) );
237 237
 	/* Copy destination address */
238
-        memcpy ( &iphdr->dest, dest, sizeof ( struct in_addr ) );
238
+	memcpy ( &iphdr->dest, dest, sizeof ( struct in_addr ) );
239 239
 
240 240
 	/**
241 241
 	 * All fields in the IP header filled in except the source network address (which requires routing). As
@@ -245,77 +245,77 @@ int ipv4_tx ( struct pk_buff *pkb, uint16_t trans_proto, struct in_addr *dest )
245 245
 	 * Continue processing as in ipv4_uip_tx()
246 246
 	 */
247 247
 
248
-        /* Use routing table to identify next hop and transmitting netdev */
249
-        next_hop = iphdr->dest;
250
-        list_for_each_entry ( miniroute, &miniroutes, list ) {
251
-                if ( ( ( ( iphdr->dest.s_addr ^ miniroute->address.s_addr ) &
252
-                         miniroute->netmask.s_addr ) == 0 ) ||
253
-                     ( miniroute->gateway.s_addr != INADDR_NONE ) ) {
254
-                        netdev = miniroute->netdev;
255
-                        source = miniroute->address;
256
-                        if ( miniroute->gateway.s_addr != INADDR_NONE )
257
-                                next_hop = miniroute->gateway;
258
-                        break;
259
-                }
248
+	/* Use routing table to identify next hop and transmitting netdev */
249
+	next_hop = iphdr->dest;
250
+	list_for_each_entry ( miniroute, &miniroutes, list ) {
251
+		if ( ( ( ( iphdr->dest.s_addr ^ miniroute->address.s_addr ) &
252
+			 miniroute->netmask.s_addr ) == 0 ) ||
253
+		     ( miniroute->gateway.s_addr != INADDR_NONE ) ) {
254
+			netdev = miniroute->netdev;
255
+			source = miniroute->address;
256
+			if ( miniroute->gateway.s_addr != INADDR_NONE )
257
+				next_hop = miniroute->gateway;
258
+			break;
259
+		}
260
+	}
261
+	/* Abort if no network device identified */
262
+	if ( ! netdev ) {
263
+		DBG ( "No route to %s\n", inet_ntoa ( iphdr->dest ) );
264
+		rc = -EHOSTUNREACH;
265
+		goto err;
266
+	}
267
+
268
+	/* Copy the source address, after this the IP header is complete */
269
+	memcpy ( &iphdr->src, &source, sizeof ( struct in_addr ) );
270
+	/* Calculate the transport layer checksum */
271
+	ipv4_tx_csum ( pkb, trans_proto );
272
+
273
+	/* Print IP4 header for debugging */
274
+	DBG ( "IP4 header at %#x + %d\n", iphdr, IP_HLEN  );
275
+	DBG ( "\tVersion = %d\n", ( iphdr->verhdrlen & IP_MASK_VER ) / 16 );
276
+	DBG ( "\tHeader length = %d\n", iphdr->verhdrlen & IP_MASK_HLEN );
277
+	DBG ( "\tService = %d\n", iphdr->service );
278
+	DBG ( "\tTotal length = %d\n", iphdr->len );
279
+	DBG ( "\tIdent = %d\n", iphdr->ident );
280
+	DBG ( "\tFrags/Offset = %d\n", iphdr->frags );
281
+	DBG ( "\tIP TTL = %d\n", iphdr->ttl );
282
+	DBG ( "\tProtocol = %d\n", iphdr->protocol );
283
+	DBG ( "\tHeader Checksum (at %#x) = %x\n", &iphdr->chksum, iphdr->chksum );
284
+	DBG ( "\tSource = %s\n", inet_ntoa ( iphdr->src) );
285
+	DBG ( "\tDestination = %s\n", inet_ntoa ( iphdr->dest ) );
286
+
287
+
288
+	/* Determine link-layer destination address */
289
+	if ( next_hop.s_addr == INADDR_BROADCAST ) {
290
+		/* Broadcast address */
291
+		ll_dest = netdev->ll_protocol->ll_broadcast;
292
+	} else if ( IN_MULTICAST ( next_hop.s_addr ) ) {
293
+		/* Special case: IPv4 multicast over Ethernet.	This
294
+		 * code may need to be generalised once we find out
295
+		 * what happens for other link layers.
296
+		 */
297
+		uint8_t *next_hop_bytes = ( uint8_t * ) &next_hop;
298
+		ll_dest_buf[0] = 0x01;
299
+		ll_dest_buf[0] = 0x00;
300
+		ll_dest_buf[0] = 0x5e;
301
+		ll_dest_buf[3] = next_hop_bytes[1] & 0x7f;
302
+		ll_dest_buf[4] = next_hop_bytes[2];
303
+		ll_dest_buf[5] = next_hop_bytes[3];
304
+	} else {
305
+		/* Unicast address: resolve via ARP */
306
+		if ( ( rc = arp_resolve ( netdev, &ipv4_protocol, &next_hop, &source, ll_dest_buf ) ) != 0 ) {
307
+			DBG ( "No ARP entry for %s\n", inet_ntoa ( iphdr->dest ) );
308
+			goto err;
309
+		}
260 310
 	}
261
-        /* Abort if no network device identified */
262
-        if ( ! netdev ) {
263
-                DBG ( "No route to %s\n", inet_ntoa ( iphdr->dest ) );
264
-                rc = -EHOSTUNREACH;
265
-                goto err;
266
-        }
267
-
268
-        /* Copy the source address, after this the IP header is complete */
269
-        memcpy ( &iphdr->src, &source, sizeof ( struct in_addr ) );
270
-        /* Calculate the transport layer checksum */
271
-        ipv4_tx_csum ( pkb, trans_proto );
272
-
273
-        /* Print IP4 header for debugging */
274
-        DBG ( "IP4 header at %#x + %d\n", iphdr, IP_HLEN  );
275
-        DBG ( "\tVersion = %d\n", ( iphdr->verhdrlen & IP_MASK_VER ) / 16 );
276
-        DBG ( "\tHeader length = %d\n", iphdr->verhdrlen & IP_MASK_HLEN );
277
-        DBG ( "\tService = %d\n", iphdr->service );
278
-        DBG ( "\tTotal length = %d\n", iphdr->len );
279
-        DBG ( "\tIdent = %d\n", iphdr->ident );
280
-        DBG ( "\tFrags/Offset = %d\n", iphdr->frags );
281
-        DBG ( "\tIP TTL = %d\n", iphdr->ttl );
282
-        DBG ( "\tProtocol = %d\n", iphdr->protocol );
283
-        DBG ( "\tHeader Checksum (at %#x) = %x\n", &iphdr->chksum, iphdr->chksum );
284
-        DBG ( "\tSource = %s\n", inet_ntoa ( iphdr->src) );
285
-        DBG ( "\tDestination = %s\n", inet_ntoa ( iphdr->dest ) );
286
-
287
-
288
-        /* Determine link-layer destination address */
289
-        if ( next_hop.s_addr == INADDR_BROADCAST ) {
290
-                /* Broadcast address */
291
-                ll_dest = netdev->ll_protocol->ll_broadcast;
292
-        } else if ( IN_MULTICAST ( next_hop.s_addr ) ) {
293
-                /* Special case: IPv4 multicast over Ethernet.  This
294
-                 * code may need to be generalised once we find out
295
-                 * what happens for other link layers.
296
-                 */
297
-                uint8_t *next_hop_bytes = ( uint8_t * ) &next_hop;
298
-                ll_dest_buf[0] = 0x01;
299
-                ll_dest_buf[0] = 0x00;
300
-                ll_dest_buf[0] = 0x5e;
301
-                ll_dest_buf[3] = next_hop_bytes[1] & 0x7f;
302
-                ll_dest_buf[4] = next_hop_bytes[2];
303
-                ll_dest_buf[5] = next_hop_bytes[3];
304
-        } else {
305
-                /* Unicast address: resolve via ARP */
306
-                if ( ( rc = arp_resolve ( netdev, &ipv4_protocol, &next_hop, &source, ll_dest_buf ) ) != 0 ) {
307
-                        DBG ( "No ARP entry for %s\n", inet_ntoa ( iphdr->dest ) );
308
-                        goto err;
309
-                }
310
-        }
311
-
312
-        /* Hand off to link layer */
313
-        return net_tx ( pkb, netdev, &ipv4_protocol, ll_dest );
311
+
312
+	/* Hand off to link layer */
313
+	return net_tx ( pkb, netdev, &ipv4_protocol, ll_dest );
314 314
 
315 315
  err:
316
-        /* Warning: Allowing this function to execute causes bochs to go into an infinite loop */
317
-        free_pkb ( pkb );
318
-        return rc;
316
+	/* Warning: Allowing this function to execute causes bochs to go into an infinite loop */
317
+	free_pkb ( pkb );
318
+	return rc;
319 319
 }
320 320
 
321 321
 /**
@@ -381,27 +381,27 @@ void ipv6_rx ( struct pk_buff *pkb __unused, struct net_device *netdev __unused,
381 381
  * This function expects an IP4 network datagram. It will process the headers and send it to the transport layer
382 382
  */
383 383
 void ipv4_rx ( struct pk_buff *pkb, struct net_device *netdev __unused,
384
-                        const void *ll_source __unused ) {
385
-        struct iphdr *iphdr = pkb->data;
386
-        struct in_addr *src = &iphdr->src;
387
-        struct in_addr *dest = &iphdr->dest;
384
+			const void *ll_source __unused ) {
385
+	struct iphdr *iphdr = pkb->data;
386
+	struct in_addr *src = &iphdr->src;
387
+	struct in_addr *dest = &iphdr->dest;
388 388
 	uint16_t chksum;
389 389
 
390
-        /* Print IP4 header for debugging */
391
-        DBG ( "IP4 header at %#x + %d\n", iphdr, IP_HLEN  );
392
-        DBG ( "\tVersion = %d\n", ( iphdr->verhdrlen & IP_MASK_VER ) / 16 );
393
-        DBG ( "\tHeader length = %d\n", iphdr->verhdrlen & IP_MASK_HLEN );
394
-        DBG ( "\tService = %d\n", iphdr->service );
395
-        DBG ( "\tTotal length = %d\n", iphdr->len );
396
-        DBG ( "\tIdent = %d\n", iphdr->ident );
397
-        DBG ( "\tFrags/Offset = %d\n", iphdr->frags );
398
-        DBG ( "\tIP TTL = %d\n", iphdr->ttl );
399
-        DBG ( "\tProtocol = %d\n", iphdr->protocol );
400
-        DBG ( "\tHeader Checksum (at %#x) = %x\n", &iphdr->chksum, iphdr->chksum );
401
-        DBG ( "\tSource = %s\n", inet_ntoa ( iphdr->src) );
402
-        DBG ( "\tDestination = %s\n", inet_ntoa ( iphdr->dest ) );
403
-
404
-        /* Process headers */
390
+	/* Print IP4 header for debugging */
391
+	DBG ( "IP4 header at %#x + %d\n", iphdr, IP_HLEN  );
392
+	DBG ( "\tVersion = %d\n", ( iphdr->verhdrlen & IP_MASK_VER ) / 16 );
393
+	DBG ( "\tHeader length = %d\n", iphdr->verhdrlen & IP_MASK_HLEN );
394
+	DBG ( "\tService = %d\n", iphdr->service );
395
+	DBG ( "\tTotal length = %d\n", iphdr->len );
396
+	DBG ( "\tIdent = %d\n", iphdr->ident );
397
+	DBG ( "\tFrags/Offset = %d\n", iphdr->frags );
398
+	DBG ( "\tIP TTL = %d\n", iphdr->ttl );
399
+	DBG ( "\tProtocol = %d\n", iphdr->protocol );
400
+	DBG ( "\tHeader Checksum (at %#x) = %x\n", &iphdr->chksum, iphdr->chksum );
401
+	DBG ( "\tSource = %s\n", inet_ntoa ( iphdr->src) );
402
+	DBG ( "\tDestination = %s\n", inet_ntoa ( iphdr->dest ) );
403
+
404
+	/* Process headers */
405 405
 	if ( iphdr->verhdrlen != 0x45 ) {
406 406
 		DBG ( "Bad version and header length %x\n", iphdr->verhdrlen );
407 407
 		return;
@@ -424,11 +424,11 @@ void ipv4_rx ( struct pk_buff *pkb, struct net_device *netdev __unused,
424 424
 	 * 3. Check the service field
425 425
 	 */
426 426
 
427
-        /* Strip header */
428
-        pkb_pull ( pkb, IP_HLEN );
427
+	/* Strip header */
428
+	pkb_pull ( pkb, IP_HLEN );
429 429
 
430
-        /* Send it to the transport layer */
431
-        trans_rx ( pkb, iphdr->protocol, src, dest );
430
+	/* Send it to the transport layer */
431
+	trans_rx ( pkb, iphdr->protocol, src, dest );
432 432
 }
433 433
 
434 434
 /** 

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