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ip_dummynet.c (46385) ip_dummynet.c (46420)
1/*
2 * Copyright (c) 1998 Luigi Rizzo
3 *
4 * Redistribution and use in source forms, with and without modification,
5 * are permitted provided that this entire comment appears intact.
6 *
7 * Redistribution in binary form may occur without any restrictions.
8 * Obviously, it would be nice if you gave credit where credit is due
9 * but requiring it would be too onerous.
10 *
11 * This software is provided ``AS IS'' without any warranties of any kind.
12 *
1/*
2 * Copyright (c) 1998 Luigi Rizzo
3 *
4 * Redistribution and use in source forms, with and without modification,
5 * are permitted provided that this entire comment appears intact.
6 *
7 * Redistribution in binary form may occur without any restrictions.
8 * Obviously, it would be nice if you gave credit where credit is due
9 * but requiring it would be too onerous.
10 *
11 * This software is provided ``AS IS'' without any warranties of any kind.
12 *
13 * $Id: ip_dummynet.c,v 1.12 1999/04/20 13:32:04 peter Exp $
13 * $Id: ip_dummynet.c,v 1.13 1999/05/04 07:30:07 luigi Exp $
14 */
15
16/*
17 * This module implements IP dummynet, a bandwidth limiter/delay emulator
18 * used in conjunction with the ipfw package.
19 *
20 * Changes:
21 *

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206
207 /*
208 * the trick to avoid flow-id settings here is to prepend a
209 * vestigial mbuf to the packet, with the following values:
210 * m_type = MT_DUMMYNET
211 * m_next = the actual mbuf to be processed by ip_input/output
212 * m_data = the matching rule
213 * The vestigial element is the same memory area used by
14 */
15
16/*
17 * This module implements IP dummynet, a bandwidth limiter/delay emulator
18 * used in conjunction with the ipfw package.
19 *
20 * Changes:
21 *

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206
207 /*
208 * the trick to avoid flow-id settings here is to prepend a
209 * vestigial mbuf to the packet, with the following values:
210 * m_type = MT_DUMMYNET
211 * m_next = the actual mbuf to be processed by ip_input/output
212 * m_data = the matching rule
213 * The vestigial element is the same memory area used by
214 * the dn_pkt, and IS FREED IN ip_input/ip_output. IT IS
215 * NOT A REAL MBUF, just a block of memory acquired with malloc().
214 * the dn_pkt, and IS FREED HERE because it can contain
215 * parameters passed to the called routine. The buffer IS NOT
216 * A REAL MBUF, just a block of memory acquired with malloc().
216 */
217 switch (pkt->dn_dir) {
218 case DN_TO_IP_OUT: {
219 struct rtentry *tmp_rt = pkt->ro.ro_rt ;
220
221 (void)ip_output((struct mbuf *)pkt, (struct mbuf *)pkt->ifp,
222 &(pkt->ro), pkt->dn_dst, NULL);
223 rt_unref (tmp_rt) ;

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234 if (m)
235 m_freem(m);
236 }
237 break ;
238#endif
239 default:
240 printf("dummynet: bad switch %d!\n", pkt->dn_dir);
241 m_freem(pkt->dn_m);
217 */
218 switch (pkt->dn_dir) {
219 case DN_TO_IP_OUT: {
220 struct rtentry *tmp_rt = pkt->ro.ro_rt ;
221
222 (void)ip_output((struct mbuf *)pkt, (struct mbuf *)pkt->ifp,
223 &(pkt->ro), pkt->dn_dst, NULL);
224 rt_unref (tmp_rt) ;

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235 if (m)
236 m_freem(m);
237 }
238 break ;
239#endif
240 default:
241 printf("dummynet: bad switch %d!\n", pkt->dn_dir);
242 m_freem(pkt->dn_m);
242 FREE(pkt, M_IPFW);
243 break ;
244 }
243 break ;
244 }
245 FREE(pkt, M_IPFW);
245 }
246}
247/*
248 * this is the periodic task that moves packets between the R-
249 * and the P- queue
250 */
251/*ARGSUSED*/
252void

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247}
248/*
249 * this is the periodic task that moves packets between the R-
250 * and the P- queue
251 */
252/*ARGSUSED*/
253void

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