![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to clnp_timer.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [CSRG BSD Unix] / 43BSDReno / sys / netiso|
Return to clnp_timer.c CVS log | Up to [CSRG BSD Unix] / 43BSDReno / sys / netiso |
1.1 root 1: /***********************************************************
2: Copyright IBM Corporation 1987
3:
4: All Rights Reserved
5:
6: Permission to use, copy, modify, and distribute this software and its
7: documentation for any purpose and without fee is hereby granted,
8: provided that the above copyright notice appear in all copies and that
9: both that copyright notice and this permission notice appear in
10: supporting documentation, and that the name of IBM not be
11: used in advertising or publicity pertaining to distribution of the
12: software without specific, written prior permission.
13:
14: IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
15: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
16: IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
17: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
18: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
19: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
20: SOFTWARE.
21:
22: ******************************************************************/
23:
24: /*
25: * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
26: */
27: /* $Header: clnp_timer.c,v 4.2 88/06/29 14:59:05 hagens Exp $ */
28: /* $Source: /usr/argo/sys/netiso/RCS/clnp_timer.c,v $ */
29: /* @(#)clnp_timer.c 7.4 (Berkeley) 9/22/89 */
30:
31: #ifndef lint
32: static char *rcsid = "$Header: clnp_timer.c,v 4.2 88/06/29 14:59:05 hagens Exp $";
33: #endif lint
34:
35: #include "param.h"
36: #include "mbuf.h"
37: #include "domain.h"
38: #include "protosw.h"
39: #include "socket.h"
40: #include "socketvar.h"
41: #include "errno.h"
42:
43: #include "../net/if.h"
44: #include "../net/route.h"
45:
46: #include "iso.h"
47: #include "clnp.h"
48: #include "clnp_stat.h"
49: #include "argo_debug.h"
50:
51: extern struct clnp_fragl *clnp_frags;
52:
53: /*
54: * FUNCTION: clnp_freefrags
55: *
56: * PURPOSE: Free the resources associated with a fragment
57: *
58: * RETURNS: pointer to next fragment in list of fragments
59: *
60: * SIDE EFFECTS:
61: *
62: * NOTES:
63: * TODO: send ER back to source
64: */
65: struct clnp_fragl *
66: clnp_freefrags(cfh)
67: register struct clnp_fragl *cfh; /* fragment header to delete */
68: {
69: struct clnp_fragl *next = cfh->cfl_next;
70: struct clnp_frag *cf;
71:
72: /* free any frags hanging around */
73: cf = cfh->cfl_frags;
74: while (cf != NULL) {
75: struct clnp_frag *cf_next = cf->cfr_next;
76: INCSTAT(cns_fragdropped);
77: m_freem(cf->cfr_data);
78: cf = cf_next;
79: }
80:
81: /* free the copy of the header */
82: INCSTAT(cns_fragdropped);
83: m_freem(cfh->cfl_orighdr);
84:
85: if (clnp_frags == cfh) {
86: clnp_frags = cfh->cfl_next;
87: } else {
88: struct clnp_fragl *scan;
89:
90: for (scan = clnp_frags; scan != NULL; scan = scan->cfl_next) {
91: if (scan->cfl_next == cfh) {
92: scan->cfl_next = cfh->cfl_next;
93: break;
94: }
95: }
96: }
97:
98: /* free the fragment header */
99: m_freem(dtom(cfh));
100:
101: return(next);
102: }
103:
104: /*
105: * FUNCTION: clnp_slowtimo
106: *
107: * PURPOSE: clnp timer processing; if the ttl expires on a
108: * packet on the reassembly queue, discard it.
109: *
110: * RETURNS: none
111: *
112: * SIDE EFFECTS:
113: *
114: * NOTES:
115: */
116: clnp_slowtimo()
117: {
118: register struct clnp_fragl *cfh = clnp_frags;
119: int s = splnet();
120:
121: while (cfh != NULL) {
122: if (--cfh->cfl_ttl == 0) {
123: cfh = clnp_freefrags(cfh);
124: INCSTAT(cns_fragtimeout);
125: } else {
126: cfh = cfh->cfl_next;
127: }
128: }
129: splx(s);
130: }
131:
132: /*
133: * FUNCTION: clnp_drain
134: *
135: * PURPOSE: drain off all datagram fragments
136: *
137: * RETURNS: none
138: *
139: * SIDE EFFECTS:
140: *
141: * NOTES:
142: * TODO: should send back ER
143: */
144: clnp_drain()
145: {
146: register struct clnp_fragl *cfh = clnp_frags;
147:
148: while (cfh != NULL)
149: cfh = clnp_freefrags(cfh);
150: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.