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94648d00 KS |
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 | ||
30 | #ifndef lint | |
31 | static char *rcsid = "$Header: clnp_timer.c,v 4.2 88/06/29 14:59:05 hagens Exp $"; | |
32 | #endif lint | |
33 | ||
34 | #ifdef ISO | |
35 | ||
36 | #include "../h/types.h" | |
37 | #include "../h/param.h" | |
38 | #include "../h/mbuf.h" | |
39 | #include "../h/domain.h" | |
40 | #include "../h/protosw.h" | |
41 | #include "../h/socket.h" | |
42 | #include "../h/socketvar.h" | |
43 | #include "../h/errno.h" | |
44 | ||
45 | #include "../net/if.h" | |
46 | #include "../net/route.h" | |
47 | ||
48 | #include "../netiso/iso.h" | |
49 | #include "../netiso/clnp.h" | |
50 | #include "../netiso/clnp_stat.h" | |
51 | #include "../netiso/argo_debug.h" | |
52 | ||
53 | extern struct clnp_fragl *clnp_frags; | |
54 | ||
55 | /* | |
56 | * FUNCTION: clnp_freefrags | |
57 | * | |
58 | * PURPOSE: Free the resources associated with a fragment | |
59 | * | |
60 | * RETURNS: pointer to next fragment in list of fragments | |
61 | * | |
62 | * SIDE EFFECTS: | |
63 | * | |
64 | * NOTES: | |
65 | * TODO: send ER back to source | |
66 | */ | |
67 | struct clnp_fragl * | |
68 | clnp_freefrags(cfh) | |
69 | register struct clnp_fragl *cfh; /* fragment header to delete */ | |
70 | { | |
71 | struct clnp_fragl *next = cfh->cfl_next; | |
72 | struct clnp_frag *cf; | |
73 | ||
74 | /* free any frags hanging around */ | |
75 | cf = cfh->cfl_frags; | |
76 | while (cf != NULL) { | |
77 | struct clnp_frag *cf_next = cf->cfr_next; | |
78 | m_freem(cf->cfr_data); | |
79 | cf = cf_next; | |
80 | } | |
81 | ||
82 | /* free the copy of the header */ | |
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 | } else { | |
125 | cfh = cfh->cfl_next; | |
126 | } | |
127 | } | |
128 | splx(s); | |
129 | } | |
130 | ||
131 | /* | |
132 | * FUNCTION: clnp_drain | |
133 | * | |
134 | * PURPOSE: drain off all datagram fragments | |
135 | * | |
136 | * RETURNS: none | |
137 | * | |
138 | * SIDE EFFECTS: | |
139 | * | |
140 | * NOTES: | |
141 | * TODO: should send back ER | |
142 | */ | |
143 | clnp_drain() | |
144 | { | |
145 | register struct clnp_fragl *cfh = clnp_frags; | |
146 | ||
147 | while (cfh != NULL) | |
148 | cfh = clnp_freefrags(cfh); | |
149 | } | |
150 | ||
151 | #endif ISO |