1 /* Shared library add-on to iptables to add OWNER matching support. */
10 #include <ip6tables.h>
11 #include <linux/netfilter_ipv6/ip6t_owner.h>
13 /* Function which prints out usage message. */
17 #ifdef IP6T_OWNER_COMM
19 "OWNER match v%s options:\n"
20 "[!] --uid-owner userid Match local uid\n"
21 "[!] --gid-owner groupid Match local gid\n"
22 "[!] --pid-owner processid Match local pid\n"
23 "[!] --sid-owner sessionid Match local sid\n"
24 "[!] --cmd-owner name Match local command name\n"
29 "OWNER match v%s options:\n"
30 "[!] --uid-owner userid Match local uid\n"
31 "[!] --gid-owner groupid Match local gid\n"
32 "[!] --pid-owner processid Match local pid\n"
33 "[!] --sid-owner sessionid Match local sid\n"
36 #endif /* IP6T_OWNER_COMM */
39 static struct option opts[] = {
40 { "uid-owner", 1, 0, '1' },
41 { "gid-owner", 1, 0, '2' },
42 { "pid-owner", 1, 0, '3' },
43 { "sid-owner", 1, 0, '4' },
44 #ifdef IP6T_OWNER_COMM
45 { "cmd-owner", 1, 0, '5' },
50 /* Function which parses command options; returns true if it
53 parse(int c, char **argv, int invert, unsigned int *flags,
54 const struct ip6t_entry *entry,
55 unsigned int *nfcache,
56 struct ip6t_entry_match **match)
58 struct ip6t_owner_info *ownerinfo = (struct ip6t_owner_info *)(*match)->data;
65 check_inverse(optarg, &invert, &optind, 0);
67 if ((pwd = getpwnam(optarg)))
68 ownerinfo->uid = pwd->pw_uid;
70 ownerinfo->uid = strtoul(optarg, &end, 0);
71 if (*end != '\0' || end == optarg)
72 exit_error(PARAMETER_PROBLEM, "Bad OWNER UID value `%s'", optarg);
75 ownerinfo->invert |= IP6T_OWNER_UID;
76 ownerinfo->match |= IP6T_OWNER_UID;
81 check_inverse(optarg, &invert, &optind, 0);
82 if ((grp = getgrnam(optarg)))
83 ownerinfo->gid = grp->gr_gid;
85 ownerinfo->gid = strtoul(optarg, &end, 0);
86 if (*end != '\0' || end == optarg)
87 exit_error(PARAMETER_PROBLEM, "Bad OWNER GID value `%s'", optarg);
90 ownerinfo->invert |= IP6T_OWNER_GID;
91 ownerinfo->match |= IP6T_OWNER_GID;
96 check_inverse(optarg, &invert, &optind, 0);
97 ownerinfo->pid = strtoul(optarg, &end, 0);
98 if (*end != '\0' || end == optarg)
99 exit_error(PARAMETER_PROBLEM, "Bad OWNER PID value `%s'", optarg);
101 ownerinfo->invert |= IP6T_OWNER_PID;
102 ownerinfo->match |= IP6T_OWNER_PID;
107 check_inverse(optarg, &invert, &optind, 0);
108 ownerinfo->sid = strtoul(optarg, &end, 0);
109 if (*end != '\0' || end == optarg)
110 exit_error(PARAMETER_PROBLEM, "Bad OWNER SID value `%s'", optarg);
112 ownerinfo->invert |= IP6T_OWNER_SID;
113 ownerinfo->match |= IP6T_OWNER_SID;
117 #ifdef IP6T_OWNER_COMM
119 check_inverse(optarg, &invert, &optind, 0);
120 if(strlen(optarg) > sizeof(ownerinfo->comm))
121 exit_error(PARAMETER_PROBLEM, "OWNER CMD `%s' too long, max %d characters", optarg, sizeof(ownerinfo->comm));
123 strncpy(ownerinfo->comm, optarg, sizeof(ownerinfo->comm));
124 ownerinfo->comm[sizeof(ownerinfo->comm)-1] = '\0';
127 ownerinfo->invert |= IP6T_OWNER_COMM;
128 ownerinfo->match |= IP6T_OWNER_COMM;
140 print_item(struct ip6t_owner_info *info, u_int8_t flag, int numeric, char *label)
142 if(info->match & flag) {
144 if (info->invert & flag)
149 switch(info->match & flag) {
152 struct passwd *pwd = getpwuid(info->uid);
154 if(pwd && pwd->pw_name) {
155 printf("%s ", pwd->pw_name);
160 printf("%u ", info->uid);
164 struct group *grp = getgrgid(info->gid);
166 if(grp && grp->gr_name) {
167 printf("%s ", grp->gr_name);
172 printf("%u ", info->gid);
175 printf("%u ", info->pid);
178 printf("%u ", info->sid);
180 #ifdef IP6T_OWNER_COMM
181 case IP6T_OWNER_COMM:
182 printf("%.*s ", (int)sizeof(info->comm), info->comm);
191 /* Final check; must have specified --own. */
193 final_check(unsigned int flags)
196 exit_error(PARAMETER_PROBLEM,
197 "OWNER match: You must specify one or more options");
200 /* Prints out the matchinfo. */
202 print(const struct ip6t_ip6 *ip,
203 const struct ip6t_entry_match *match,
206 struct ip6t_owner_info *info = (struct ip6t_owner_info *)match->data;
208 print_item(info, IP6T_OWNER_UID, numeric, "OWNER UID match ");
209 print_item(info, IP6T_OWNER_GID, numeric, "OWNER GID match ");
210 print_item(info, IP6T_OWNER_PID, numeric, "OWNER PID match ");
211 print_item(info, IP6T_OWNER_SID, numeric, "OWNER SID match ");
212 #ifdef IP6T_OWNER_COMM
213 print_item(info, IP6T_OWNER_COMM, numeric, "OWNER CMD match ");
217 /* Saves the union ip6t_matchinfo in parsable form to stdout. */
219 save(const struct ip6t_ip6 *ip, const struct ip6t_entry_match *match)
221 struct ip6t_owner_info *info = (struct ip6t_owner_info *)match->data;
223 print_item(info, IP6T_OWNER_UID, 0, "--uid-owner ");
224 print_item(info, IP6T_OWNER_GID, 0, "--gid-owner ");
225 print_item(info, IP6T_OWNER_PID, 0, "--pid-owner ");
226 print_item(info, IP6T_OWNER_SID, 0, "--sid-owner ");
227 #ifdef IP6T_OWNER_COMM
228 print_item(info, IP6T_OWNER_COMM, 0, "--cmd-owner ");
232 static struct ip6tables_match owner = {
234 .version = IPTABLES_VERSION,
235 .size = IP6T_ALIGN(sizeof(struct ip6t_owner_info)),
236 .userspacesize = IP6T_ALIGN(sizeof(struct ip6t_owner_info)),
239 .final_check = &final_check,
247 register_match6(&owner);