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1.1 root 1: #include <sys/types.h>
2: #include <sys/stat.h>
3: #include <sys/inet/in.h>
4: #include <stdio.h>
5: #include <ctype.h>
6: #include "config.h"
7:
8: struct namefile {
9: char *name;
10: char *data;
11: long time;
12: };
13:
14: static struct namefile files[] = {
15: { "/usr/ipc/lib/inaddr.local", 0, 0 },
16: { "/usr/ipc/lib/inaddr", 0, 0 },
17: { "/usr/inet/lib/hosts", 0, 0 },
18: { "/usr/inet/lib/networks", 0, 0 },
19: };
20: #define NFIL (sizeof(files)/sizeof(struct namefile))
21:
22: struct trbuf {
23: struct trbuf *next;
24: in_addr addr;
25: char *name;
26: };
27:
28: #define TLBSIZE 1023
29: static struct trbuf tlb[TLBSIZE];
30:
31: /* imported */
32: extern char *in_getw();
33: extern char *malloc();
34:
35: /* exported */
36: int in_host_dostat=1;
37:
38: static int
39: getfile(i)
40: int i;
41: {
42: int fd;
43: struct stat sbuf;
44: unsigned int x;
45:
46: if (in_host_dostat)
47: stat(files[i].name, &sbuf);
48: else
49: sbuf.st_mtime = files[i].time;
50: if (files[i].data == 0 || sbuf.st_mtime!=files[i].time) {
51: if (!in_host_dostat)
52: stat(files[i].name, &sbuf);
53: fd = open(files[i].name, 0);
54: if (fd<0)
55: return -1;
56: if (files[i].data!=0)
57: free(files[i].data);
58: x = sbuf.st_size;
59: files[i].data = malloc(x+2);
60: if (files[i].data==0) {
61: close(fd);
62: return -1;
63: }
64: if (read(fd, files[i].data, x)!=x){
65: close(fd);
66: return -1;
67: }
68: close(fd);
69: files[i].data[sbuf.st_size] = '\n';
70: files[i].data[sbuf.st_size+1] = 0;
71: files[i].time = sbuf.st_mtime;
72: for (i=0; i<TLBSIZE; i++)
73: tlb[i].addr = 0;
74: }
75: return 0;
76: }
77:
78: #define SKIPWHITE while(*p==' ' || *p=='\t') p++
79: #define GETBLACK xp = b;\
80: while(*p!=' ' && *p!='\t' && *p!='\n' && *p!='\0')\
81: *xp++ = *p++;\
82: *xp = '\0'
83:
84: char *
85: in_host(addr)
86: in_addr addr;
87: {
88: register char *p, *xp, *op;
89: unsigned char *yp;
90: static char b[32];
91: int f;
92: in_addr x, in_netof(), in_aton();
93:
94: if (addr==0)
95: return "*";
96: for(f=0; f<NFIL; f++){
97: if (getfile(f) < 0) {
98: continue;
99: } else if (addr == tlb[addr%TLBSIZE].addr) {
100: p = tlb[addr%TLBSIZE].name;
101: GETBLACK;
102: return(b);
103: } else for (p = files[f].data; *p; p++){
104: /* get number */
105: SKIPWHITE;
106: GETBLACK;
107: x = in_aton(b);
108: SKIPWHITE;
109: if (x != 0 && *p != '\n') {
110: /* get name */
111: op = p;
112: GETBLACK;
113:
114: /* see if this is the one */
115: if (x==addr){
116: int i;
117:
118: i = x%TLBSIZE;
119: tlb[i].addr = x;
120: tlb[i].name = op;
121: return b;
122: }
123: }
124: /* drop rest of line */
125: while(*p!='\n'&&*p!='\0') p++;
126: }
127: }
128: yp = (unsigned char *) &addr;
129: sprintf(b, "%d.%d.%d.%d", yp[3], yp[2], yp[1], yp[0]);
130: return(b);
131: }
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