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c60d02ed GB |
1 | #include <stdio.h> |
2 | #include <string.h> | |
3 | #include <assert.h> | |
4 | #include "../lib/irc_string.h" | |
5 | #include "../lib/version.h" | |
6 | #include "../core/schedule.h" | |
7 | #include "../irc/irc.h" | |
8 | #include "../trusts/trusts.h" | |
9 | #include "../control/control.h" | |
10 | #include "glines.h" | |
11 | ||
923bc30c GB |
12 | /** Find canonical user and host for a string. |
13 | * If \a userhost starts with '$', assign \a userhost to *user_p and NULL to *host_p. | |
14 | * Otherwise, if \a userhost contains '@', assign the earlier part of it to *user_p and the rest to *host_p. | |
15 | * Otherwise, assign \a def_user to *user_p and \a userhost to *host_p. | |
16 | * | |
17 | * @param[in] userhost Input string from user. | |
18 | * @param[out] nick_p Gets pointer to nick part of hostmask. | |
19 | * @param[out] user_p Gets pointer to user (or channel/realname) part of hostmask. | |
20 | * @param[out] host_p Gets point to host part of hostmask (may be assigned NULL). | |
21 | * @param[in] def_user Default value for user part. | |
22 | */ | |
23 | static void | |
24 | canon_userhost(char *userhost, char **nick_p, char **user_p, char **host_p, char *def_user) { | |
25 | char *tmp, *s; | |
26 | ||
27 | if (*userhost == '$') { | |
28 | *user_p = userhost; | |
29 | *host_p = NULL; | |
30 | *nick_p = NULL; | |
31 | return; | |
32 | } | |
33 | ||
34 | if ((tmp = strchr(userhost, '!'))) { | |
35 | *nick_p = userhost; | |
36 | *(tmp++) = '\0'; | |
37 | } else { | |
38 | *nick_p = def_user; | |
39 | tmp = userhost; | |
40 | } | |
41 | ||
42 | if (!(s = strchr(tmp, '@'))) { | |
43 | *user_p = def_user; | |
44 | *host_p = tmp; | |
45 | } else { | |
46 | *user_p = tmp; | |
47 | *(s++) = '\0'; | |
48 | *host_p = s; | |
49 | } | |
50 | } | |
51 | ||
c60d02ed GB |
52 | gline *makegline(const char *mask) { |
53 | /* populate gl-> user,host,node,nick and set appropriate flags */ | |
54 | gline *gl; | |
923bc30c GB |
55 | char dupmask[512]; |
56 | char *nick, *user, *host; | |
27a53417 GB |
57 | const char *pos; |
58 | int count; | |
c60d02ed | 59 | |
923bc30c | 60 | /* Make sure there are no spaces in the mask */ |
c60d02ed GB |
61 | if (strchr(mask, ' ') != NULL) |
62 | return NULL; | |
63 | ||
a24820ff GB |
64 | /* Make sure it's not too long */ |
65 | if (strlen(mask) > NICKLEN + USERLEN + HOSTLEN + 2) | |
66 | return NULL; | |
67 | ||
c60d02ed GB |
68 | gl = newgline(); |
69 | ||
70 | if (!gl) { | |
71 | Error("gline", ERR_ERROR, "Failed to allocate new gline"); | |
72 | return NULL; | |
73 | } | |
923bc30c | 74 | |
a86fc0c4 | 75 | if (mask[0] == '#' || mask[0] == '&') { |
c60d02ed GB |
76 | gl->flags |= GLINE_BADCHAN; |
77 | gl->user = getsstring(mask, CHANNELLEN); | |
78 | return gl; | |
79 | } | |
80 | ||
a86fc0c4 | 81 | if (mask[0] == '$') { |
c60d02ed GB |
82 | if (mask[1] != 'R') { |
83 | freegline(gl); | |
84 | return NULL; | |
85 | } | |
86 | ||
87 | gl->flags |= GLINE_REALNAME; | |
88 | gl->user = getsstring(mask + 2, REALLEN); | |
89 | return gl; | |
90 | } | |
91 | ||
923bc30c GB |
92 | strncpy(dupmask, mask, sizeof(dupmask)); |
93 | canon_userhost(dupmask, &nick, &user, &host, "*"); | |
c60d02ed | 94 | |
923bc30c | 95 | if (ipmask_parse(host, &gl->ip, &gl->bits)) |
c60d02ed GB |
96 | gl->flags |= GLINE_IPMASK; |
97 | else | |
98 | gl->flags |= GLINE_HOSTMASK; | |
99 | ||
923bc30c GB |
100 | /* Don't allow invalid IPv6 bans as those might match * on snircd 1.3.4 */ |
101 | count = 0; | |
27a53417 | 102 | |
923bc30c GB |
103 | for (pos = host; *pos; pos++) |
104 | if (*pos == ':') | |
105 | count++; | |
27a53417 | 106 | |
923bc30c GB |
107 | if (count >= 8) { |
108 | controlwall(NO_OPER, NL_GLINES, "Warning: Parsed invalid IPv6 G-Line: %s", mask); | |
109 | freegline(gl); | |
110 | return NULL; | |
27a53417 GB |
111 | } |
112 | ||
923bc30c GB |
113 | if (strcmp(nick, "*") != 0) |
114 | gl->nick = getsstring(nick, 512); | |
c60d02ed | 115 | |
923bc30c GB |
116 | if (strcmp(user, "*") != 0) |
117 | gl->user = getsstring(user, 512); | |
c60d02ed | 118 | |
923bc30c GB |
119 | if (strcmp(host, "*") != 0) |
120 | gl->host = getsstring(host, 512); | |
c60d02ed GB |
121 | |
122 | return gl; | |
123 | } | |
124 | ||
125 | char *glinetostring(gline *gl) { | |
126 | static char mask[512]; /* check */ | |
127 | ||
128 | if (gl->flags & GLINE_REALNAME) { | |
129 | if (gl->user) | |
130 | snprintf(mask, sizeof(mask), "$R%s", gl->user->content); | |
131 | else | |
132 | strncpy(mask, "$R*", sizeof(mask)); | |
133 | ||
134 | return mask; | |
135 | } | |
136 | ||
137 | if (gl->flags & GLINE_BADCHAN) { | |
138 | assert(gl->user); | |
139 | ||
140 | strncpy(mask, gl->user->content, sizeof(mask)); | |
141 | return mask; | |
142 | } | |
143 | ||
144 | snprintf(mask, sizeof(mask), "%s!%s@%s", | |
145 | gl->nick ? gl->nick->content : "*", | |
146 | gl->user ? gl->user->content : "*", | |
147 | gl->host ? gl->host->content : "*"); | |
148 | ||
149 | return mask; | |
150 | } | |
151 |