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Merge pull request #7314 from kuldeepkash/multicast-sm-topo1
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1 /*
2 * Copyright (c) 2017-20 David Lamparter, for NetDEF, Inc.
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #ifdef HAVE_CONFIG_H
18 #include "config.h"
19 #endif
20
21 #include <stdlib.h>
22 #include <stdarg.h>
23 #include <string.h>
24 #include <pthread.h>
25 #include <signal.h>
26 #include <inttypes.h>
27
28 #include "xref.h"
29 #include "vty.h"
30 #include "jhash.h"
31 #include "sha256.h"
32 #include "memory.h"
33 #include "hash.h"
34
35 struct xref_block *xref_blocks;
36 static struct xref_block **xref_block_last = &xref_blocks;
37
38 static void base32(uint8_t **inpos, int *bitpos,
39 char *out, size_t n_chars)
40 {
41 static const char base32ch[] = "0123456789ABCDEFGHJKMNPQRSTVWXYZ";
42
43 char *opos = out;
44 uint8_t *in = *inpos;
45 int bp = *bitpos;
46
47 while (opos < out + n_chars) {
48 uint32_t bits = in[0] | (in[1] << 8);
49
50 if (bp == -1)
51 bits |= 0x10;
52 else
53 bits >>= bp;
54
55 *opos++ = base32ch[bits & 0x1f];
56
57 bp += 5;
58 if (bp >= 8)
59 in++, bp -= 8;
60 }
61 *opos = '\0';
62 *inpos = in;
63 *bitpos = bp;
64 }
65
66 void xref_block_add(struct xref_block *block)
67 {
68 const struct xref * const *xrefp;
69 SHA256_CTX sha;
70
71 *xref_block_last = block;
72 xref_block_last = &block->next;
73
74 for (xrefp = block->start; xrefp < block->stop; xrefp++) {
75 const struct xref *xref = *xrefp;
76 struct xrefdata *xrefdata;
77
78 const char *filename, *p, *q;
79 uint8_t hash[32], *h = hash;
80 uint32_t be_val;
81 int bitpos;
82
83 if (!xref || !xref->xrefdata)
84 continue;
85
86 xrefdata = xref->xrefdata;
87 xrefdata->xref = xref;
88
89 if (!xrefdata->hashstr)
90 continue;
91
92 /* as far as the unique ID is concerned, only use the last
93 * directory name + filename, e.g. "bgpd/bgp_route.c". This
94 * gives a little leeway in moving things and avoids IDs being
95 * screwed up by out of tree builds or absolute pathnames.
96 */
97 filename = xref->file;
98 p = strrchr(filename, '/');
99 if (p) {
100 q = memrchr(filename, '/', p - filename);
101 if (q)
102 filename = q + 1;
103 else
104 filename = p + 1;
105 }
106
107 SHA256_Init(&sha);
108 SHA256_Update(&sha, filename, strlen(filename));
109 SHA256_Update(&sha, xrefdata->hashstr,
110 strlen(xrefdata->hashstr));
111 be_val = htonl(xrefdata->hashu32[0]);
112 SHA256_Update(&sha, &be_val, sizeof(be_val));
113 be_val = htonl(xrefdata->hashu32[1]);
114 SHA256_Update(&sha, &be_val, sizeof(be_val));
115 SHA256_Final(hash, &sha);
116
117 bitpos = -1;
118 base32(&h, &bitpos, &xrefdata->uid[0], 5);
119 xrefdata->uid[5] = '-';
120 base32(&h, &bitpos, &xrefdata->uid[6], 5);
121 }
122 }