Commit | Line | Data |
---|---|---|
f8beb284 MW |
1 | /*$Id: checktag.c,v 1.3 1999/12/23 02:40:57 lindberg Exp $*/ |
2 | /*$Name: ezmlm-idx-040 $*/ | |
3 | #include "stralloc.h" | |
4 | #include "scan.h" | |
5 | #include "fmt.h" | |
6 | #include "cookie.h" | |
7 | #include "makehash.h" | |
8 | #include "strerr.h" | |
9 | #include "errtxt.h" | |
10 | #include "subscribe.h" | |
11 | #include <unistd.h> | |
12 | #include <libpq-fe.h> | |
13 | ||
14 | static stralloc key = {0}; | |
15 | static stralloc line = {0}; | |
16 | static strnum[FMT_ULONG]; | |
17 | static newcookie[COOKIE]; | |
18 | ||
19 | char *checktag (dir,num,listno,action,seed,hash) | |
20 | /* reads dir/sql. If not present, returns success (NULL). If dir/sql is */ | |
21 | /* present, checks hash against the cookie table. If match, returns success*/ | |
22 | /* (NULL), else returns "". If error, returns error string. */ | |
23 | ||
24 | ||
25 | char *dir; /* the db base dir */ | |
26 | unsigned long num; /* message number */ | |
27 | unsigned long listno; /* bottom of range => slave */ | |
28 | char *action; | |
29 | char *seed; /* cookie base */ | |
30 | char *hash; /* cookie */ | |
31 | { | |
32 | PGresult *result; | |
33 | /* int row; */ | |
34 | char *table = (char *) 0; | |
35 | char *r; | |
36 | ||
37 | if ((r = opensql(dir,&table))) { | |
38 | if (*r) return r; | |
39 | if (!seed) return (char *) 0; /* no data - accept */ | |
40 | ||
41 | strnum[fmt_ulong(strnum,num)] = '\0'; /* message nr ->string*/ | |
42 | ||
43 | switch(slurp("key",&key,32)) { | |
44 | case -1: | |
45 | return ERR_READ_KEY; | |
46 | case 0: | |
47 | return ERR_NOEXIST_KEY; | |
48 | } | |
49 | ||
50 | cookie(newcookie,key.s,key.len,strnum,seed,action); | |
51 | if (byte_diff(hash,COOKIE,newcookie)) return ""; | |
52 | else return (char *) 0; | |
53 | ||
54 | } else { | |
55 | ||
56 | /* SELECT msgnum FROM table_cookie WHERE msgnum=num and cookie='hash' */ | |
57 | /* succeeds only is everything correct. 'hash' is quoted since it is */ | |
58 | /* potentially hostile. */ | |
59 | if (listno) { /* only for slaves */ | |
60 | if (!stralloc_copys(&line,"SELECT listno FROM ")) return ERR_NOMEM; | |
61 | if (!stralloc_cats(&line,table)) return ERR_NOMEM; | |
62 | if (!stralloc_cats(&line,"_mlog WHERE listno=")) return ERR_NOMEM; | |
63 | if (!stralloc_catb(&line,strnum,fmt_ulong(strnum,listno))) | |
64 | return ERR_NOMEM; | |
65 | if (!stralloc_cats(&line," AND msgnum=")) return ERR_NOMEM; | |
66 | if (!stralloc_catb(&line,strnum,fmt_ulong(strnum,num))) return ERR_NOMEM; | |
67 | if (!stralloc_cats(&line," AND done > 3")) return ERR_NOMEM; | |
68 | ||
69 | if (!stralloc_0(&line)) return ERR_NOMEM; | |
70 | result = PQexec( psql, line.s ); | |
71 | if(result == NULL) | |
72 | return (PQerrorMessage(psql)); | |
73 | if( PQresultStatus(result) != PGRES_TUPLES_OK) | |
74 | return (char *) (PQresultErrorMessage(result)); | |
75 | if( PQntuples(result) > 0 ) { | |
76 | PQclear(result); | |
77 | return(""); | |
78 | } else | |
79 | PQclear(result); | |
80 | } | |
81 | ||
82 | if (!stralloc_copys(&line,"SELECT msgnum FROM ")) return ERR_NOMEM; | |
83 | if (!stralloc_cats(&line,table)) return ERR_NOMEM; | |
84 | if (!stralloc_cats(&line,"_cookie WHERE msgnum=")) return ERR_NOMEM; | |
85 | if (!stralloc_catb(&line,strnum,fmt_ulong(strnum,num))) return ERR_NOMEM; | |
86 | if (!stralloc_cats(&line," and cookie='")) return ERR_NOMEM; | |
87 | if (!stralloc_catb(&line,strnum,fmt_ulong(strnum,hash))) return ERR_NOMEM; | |
88 | if (!stralloc_cats(&line,"'")) return ERR_NOMEM; | |
89 | ||
90 | if (!stralloc_0(&line)) return ERR_NOMEM; | |
91 | result = PQexec(psql,line.s); | |
92 | if (result == NULL) | |
93 | return (PQerrorMessage(psql)); | |
94 | if (PQresultStatus(result) != PGRES_TUPLES_OK) | |
95 | return (char *) (PQresultErrorMessage(result)); | |
96 | if(PQntuples(result) < 0) { | |
97 | PQclear( result ); | |
98 | return(""); | |
99 | } | |
100 | ||
101 | PQclear(result); | |
102 | if (listno) | |
103 | (void) logmsg(dir,num,listno,0L,3); /* non-ess mysql logging */ | |
104 | return (char *)0; | |
105 | } | |
106 | } |