1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* auditd.c
*
* TOMOYO Linux's utilities.
*
* Copyright (C) 2005-2010 NTT DATA CORPORATION
*
* Version: 1.7.2 2010/04/01
*
*/
#include "ccstools.h"
int open_stream(const char *filename)
{
const int fd = socket(AF_INET, SOCK_STREAM, 0);
struct sockaddr_in addr;
char c;
int len = strlen(filename) + 1;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = network_ip;
addr.sin_port = network_port;
if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) ||
write(fd, filename, len) != len || read(fd, &c, 1) != 1 || c) {
close(fd);
return EOF;
}
return fd;
}
int auditd_main(int argc, char *argv[])
{
const char *procfile_path[CCS_AUDITD_MAX_FILES] = {
proc_policy_grant_log,
proc_policy_reject_log
};
int i;
int fd_in[CCS_AUDITD_MAX_FILES];
FILE *fp_out[CCS_AUDITD_MAX_FILES];
const char *logfile_path[2] = { NULL, NULL };
for (i = 1; i < argc; i++) {
char *ptr = argv[i];
char *cp = strchr(ptr, ':');
if (*ptr == '/') {
if (!logfile_path[0])
logfile_path[0] = ptr;
else if (!logfile_path[1])
logfile_path[1] = ptr;
else
goto usage;
} else if (cp) {
*cp++ = '\0';
if (network_mode)
goto usage;
network_ip = inet_addr(ptr);
network_port = htons(atoi(cp));
network_mode = true;
if (!check_remote_host())
return 1;
procfile_path[0] = "proc:grant_log";
procfile_path[1] = "proc:reject_log";
} else
goto usage;
}
if (!logfile_path[1])
goto usage;
if (network_mode)
goto start;
if (access(procfile_path[0], R_OK) || access(procfile_path[1], R_OK)) {
fprintf(stderr, "You can't run this daemon for this kernel.\n");
return 0;
}
{ /* Get exclusive lock. */
int fd = open("/proc/self/exe", O_RDONLY);
if (flock(fd, LOCK_EX | LOCK_NB) == EOF)
return 0;
}
start:
umask(077);
for (i = 0; i < CCS_AUDITD_MAX_FILES; i++) {
fp_out[i] = fopen(logfile_path[i], "a");
if (!fp_out[i]) {
fprintf(stderr, "Can't open %s for writing.\n",
logfile_path[i]);
return 1;
}
}
switch (fork()) {
case 0:
break;
case -1:
fprintf(stderr, "Can't fork()\n");
return 1;
default:
return 0;
}
if (setsid() == EOF) {
fprintf(stderr, "Can't setsid()\n");
return 1;
}
switch (fork()) {
case 0:
break;
case -1:
fprintf(stderr, "Can't fork()\n");
return 1;
default:
return 0;
}
if (chdir("/")) {
fprintf(stderr, "Can't chdir()\n");
return 1;
}
close(0);
close(1);
close(2);
openlog("ccs-auditd", 0, LOG_USER);
for (i = 0; i < CCS_AUDITD_MAX_FILES; i++) {
if (network_mode)
fd_in[i] = open_stream(procfile_path[i]);
else
fd_in[i] = open(procfile_path[i], O_RDONLY);
if (fd_in[i] == EOF) {
syslog(LOG_WARNING, "Can't open %s for reading.\n",
procfile_path[i]);
return 1;
}
}
syslog(LOG_WARNING, "Started.\n");
while (true) {
char buffer[32768];
fd_set rfds;
FD_ZERO(&rfds);
for (i = 0; i < CCS_AUDITD_MAX_FILES; i++)
FD_SET(fd_in[i], &rfds);
/* Wait for data. */
if (select(FD_SETSIZE, &rfds, NULL, NULL, NULL) == EOF)
break;
for (i = 0; i < CCS_AUDITD_MAX_FILES; i++) {
time_t stamp;
char *cp;
if (!FD_ISSET(fd_in[i], &rfds))
continue;
memset(buffer, 0, sizeof(buffer));
if (network_mode) {
int j;
for (j = 0; j < sizeof(buffer) - 1; j++) {
if (read(fd_in[i], buffer + j, 1) != 1)
goto out;
if (!buffer[j])
break;
}
if (j == sizeof(buffer) - 1)
goto out;
} else
if (read(fd_in[i], buffer, sizeof(buffer) - 1)
< 0)
continue;
/* Open destination file. */
if (access(logfile_path[i], F_OK)) {
fclose(fp_out[i]);
fp_out[i] = fopen(logfile_path[i], "a");
if (!fp_out[i]) {
syslog(LOG_WARNING,
"Can't open %s for writing.\n",
logfile_path[i]);
goto out;
}
}
cp = strchr(buffer, ' ');
if (sscanf(buffer, "#timestamp=%lu", &stamp) == 1
&& cp) {
struct tm *tm = localtime(&stamp);
fprintf(fp_out[i],
"#%04d-%02d-%02d %02d:%02d:%02d#%s\n",
tm->tm_year + 1900, tm->tm_mon + 1,
tm->tm_mday, tm->tm_hour, tm->tm_min,
tm->tm_sec, cp);
} else
fprintf(fp_out[i], "%s\n", buffer);
fflush(fp_out[i]);
}
}
out:
syslog(LOG_WARNING, "Terminated.\n");
closelog();
return 0;
usage:
fprintf(stderr, "%s grant_log_file reject_log_file "
"[remote_ip:remote_port]\n"
" These files may /dev/null, if needn't to be saved."
"\n", argv[0]);
return 0;
}
|
