ttestlookup.c - plan9port - [fork] Plan 9 from user space | |
git clone git://src.adamsgaard.dk/plan9port | |
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ttestlookup.c (3195B) | |
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1 #include <u.h> | |
2 #include <libc.h> | |
3 #include <ip.h> | |
4 #include <bio.h> | |
5 #include <ndb.h> | |
6 | |
7 static uchar noether[6]; | |
8 Ndb *db; | |
9 | |
10 static void | |
11 recursesubnet(Ndb *db, uchar *addr, uchar *mask, char *attr, char *name,… | |
12 { | |
13 Ndbs s; | |
14 Ndbtuple *t, *nt; | |
15 uchar submask[IPaddrlen], net[IPaddrlen]; | |
16 char ip[Ndbvlen]; | |
17 int found; | |
18 | |
19 maskip(addr, mask, net); | |
20 sprint(ip, "%I", net); | |
21 t = ndbsearch(db, &s, "ip", ip); | |
22 if(t == 0) | |
23 return; | |
24 | |
25 for(nt = t; nt; nt = nt->entry){ | |
26 if(strcmp(nt->attr, "ipmask") == 0){ | |
27 parseip(submask, nt->val); | |
28 if(memcmp(submask, mask, IPaddrlen) != 0) | |
29 recursesubnet(db, addr, submask, attr, n… | |
30 break; | |
31 } | |
32 } | |
33 | |
34 if(name[0] == 0){ | |
35 found = 0; | |
36 for(nt = t; nt; nt = nt->entry){ | |
37 if(strcmp(nt->attr, attr) == 0){ | |
38 if(found){ | |
39 strcpy(name, nt->val); | |
40 name1[0] = 0; | |
41 found = 1; | |
42 } else { | |
43 strcpy(name1, nt->val); | |
44 break; | |
45 } | |
46 } | |
47 } | |
48 } | |
49 | |
50 ndbfree(t); | |
51 } | |
52 | |
53 /* | |
54 * lookup an ip address | |
55 */ | |
56 static int | |
57 getipaddr(Ndb *db, char *name, uchar *to, Ipinfo *iip) | |
58 { | |
59 Ndbtuple *t, *nt; | |
60 char buf[Ndbvlen]; | |
61 uchar subnet[IPaddrlen]; | |
62 Ndbs s; | |
63 char *attr; | |
64 | |
65 attr = ipattr(name); | |
66 if(strcmp(attr, "ip") == 0){ | |
67 parseip(to, name); | |
68 return 1; | |
69 } | |
70 | |
71 t = ndbgetval(db, &s, attr, name, "ip", buf); | |
72 if(t){ | |
73 /* first look for match on same subnet */ | |
74 for(nt = t; nt; nt = nt->entry){ | |
75 if(strcmp(nt->attr, "ip") != 0) | |
76 continue; | |
77 parseip(to, nt->val); | |
78 maskip(to, iip->ipmask, subnet); | |
79 if(memcmp(subnet, iip->ipnet, sizeof(subnet)) ==… | |
80 return 1; | |
81 } | |
82 | |
83 /* otherwise, just take what we have */ | |
84 ndbfree(t); | |
85 parseip(to, buf); | |
86 return 1; | |
87 } | |
88 return 0; | |
89 } | |
90 | |
91 /* | |
92 * return the ip addresses for a type of server for system ip | |
93 */ | |
94 int | |
95 lookupserver(char *attr, uchar ipaddrs[2][IPaddrlen], Ipinfo *iip) | |
96 { | |
97 Ndbtuple *t, *nt; | |
98 Ndbs s; | |
99 char ip[32]; | |
100 char name[Ndbvlen]; | |
101 char name1[Ndbvlen]; | |
102 int i; | |
103 | |
104 name[0] = name1[0] = 0; | |
105 | |
106 snprint(ip, sizeof(ip), "%I", iip->ipaddr); | |
107 t = ndbsearch(db, &s, "ip", ip); | |
108 while(t){ | |
109 for(nt = t; nt; nt = nt->entry){ | |
110 if(strcmp(attr, nt->attr) == 0){ | |
111 if(*name == 0) | |
112 strcpy(name, nt->val); | |
113 else { | |
114 strcpy(name1, nt->val); | |
115 break; | |
116 } | |
117 } | |
118 } | |
119 if(name[0]) | |
120 break; | |
121 t = ndbsnext(&s, "ip", ip); | |
122 } | |
123 | |
124 if(name[0] == 0) | |
125 recursesubnet(db, iip->ipaddr, classmask[CLASS(iip->ipad… | |
126 | |
127 i = 0; | |
128 if(name[0] && getipaddr(db, name, *ipaddrs, iip) == 1){ | |
129 ipaddrs++; | |
130 i++; | |
131 } | |
132 if(name1[0] && getipaddr(db, name1, *ipaddrs, iip) == 1) | |
133 i++; | |
134 return i; | |
135 } | |
136 | |
137 void | |
138 main(int argc, char **argv) | |
139 { | |
140 Ipinfo ii; | |
141 uchar addrs[2][IPaddrlen]; | |
142 int i, j; | |
143 | |
144 db = ndbopen(0); | |
145 | |
146 fmtinstall('E', eipconv); | |
147 fmtinstall('I', eipconv); | |
148 if(argc < 2) | |
149 exits(0); | |
150 if(strchr(argv[1], '.')){ | |
151 if(ipinfo(db, 0, argv[1], 0, &ii) < 0) | |
152 exits(0); | |
153 } else { | |
154 if(ipinfo(db, argv[1], 0, 0, &ii) < 0) | |
155 exits(0); | |
156 } | |
157 print("a %I m %I n %I f %s e %E a %I\n", ii.ipaddr, | |
158 ii.ipmask, ii.ipnet, ii.bootf, ii.etheraddr, ii.auip); | |
159 | |
160 i = lookupserver("auth", addrs, &ii); | |
161 print("lookupserver returns %d\n", i); | |
162 for(j = 0; j < i; j++) | |
163 print("%I\n", addrs[j]); | |
164 i = lookupserver("dns", addrs, &ii); | |
165 print("lookupserver returns %d\n", i); | |
166 for(j = 0; j < i; j++) | |
167 print("%I\n", addrs[j]); | |
168 } |