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
|
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
|
-
-
+
+
-
-
+
+
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
|
off_t length; /*** Range length ***/
} range;
} headers;
};
/* Global variables */
/** Open File cache **/
struct filed_fileinfo *filed_fileinfo_fdcache;
unsigned int filed_fileinfo_fdcache_size = CACHE_SIZE;
struct filed_fileinfo *filed_fileinfo_fdcache = NULL;
unsigned int filed_fileinfo_fdcache_size = 0;
/* Initialize process */
static int filed_init(void) {
/* Initialize cache */
static int filed_init_cache(unsigned int cache_size) {
unsigned int idx;
int mutex_init_ret;
mlockall(MCL_CURRENT | MCL_FUTURE);
/* Cache may not be re-initialized */
if (filed_fileinfo_fdcache_size != 0 || filed_fileinfo_fdcache != NULL) {
return(1);
}
/* Allocate cache */
filed_fileinfo_fdcache_size = cache_size;
filed_fileinfo_fdcache = malloc(sizeof(*filed_fileinfo_fdcache) * filed_fileinfo_fdcache_size);
if (filed_fileinfo_fdcache == NULL) {
return(1);
}
/* Initialize cache entries */
for (idx = 0; idx < filed_fileinfo_fdcache_size; idx++) {
mutex_init_ret = pthread_mutex_init(&filed_fileinfo_fdcache[idx].mutex, NULL);
if (mutex_init_ret != 0) {
return(1);
}
filed_fileinfo_fdcache[idx].path = strdup("");
filed_fileinfo_fdcache[idx].fd = -1;
filed_fileinfo_fdcache[idx].lastmod = "";
filed_fileinfo_fdcache[idx].type = "";
}
return(0);
}
/* Initialize process */
static int filed_init(unsigned int cache_size) {
static int called = 0;
int cache_ret;
if (called) {
return(0);
}
called = 1;
mlockall(MCL_CURRENT | MCL_FUTURE);
signal(SIGPIPE, SIG_IGN);
cache_ret = filed_init_cache(cache_size);
if (cache_ret != 0) {
return(cache_ret);
}
return(0);
}
/* Listen on a particular address/port */
static int filed_listen(const char *address, unsigned int port) {
struct sockaddr_in6 addr;
|
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
|
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
-
+
+
-
+
+
+
+
+
+
+
+
+
-
-
+
+
|
static void filed_log_msg(const char *buffer) {
/* XXX:TODO: Unimplemented */
fprintf(stderr, "%s\n", buffer);
return;
}
unsigned char curr;
unsigned char curr, prev;
int diff;
unsigned int retval;
retval = modulus - 1;
prev = modulus % 255;
while ((curr = *value)) {
if (curr < 32) {
curr = 255 - curr;
} else {
curr -= 32;
}
if (prev < curr) {
diff = curr - prev;
} else {
diff = prev - curr;
}
retval <<= 5;
retval += curr;
retval <<= 3;
retval ^= diff;
value++;
}
retval = retval % modulus;
return(retval);
|
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
|
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
|
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
+
+
+
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
|
if (pthread_ret != 0) {
return(-1);
}
}
return(0);
}
/* Display help */
static void filed_print_help(FILE *output, const char *extra) {
if (extra) {
fprintf(output, "%s\n", extra);
}
fprintf(output, "Usage: filed [<options>]\n");
return;
}
/* Add a getopt option */
static void filed_getopt_long_setopt(struct option *opt, const char *name, int has_arg, int val) {
opt->name = name;
opt->has_arg = has_arg;
opt->flag = NULL;
opt->val = val;
return;
}
/* Resolve a username to a UID */
static int filed_user_lookup(const char *user, uid_t *user_id) {
struct passwd *ent;
ent = getpwnam(user);
if (ent == NULL) {
return(1);
}
*user_id = ent->pw_uid;
return(0);
}
/* Run process */
int main(int argc, char **argv) {
struct option options[8];
const char *bind_addr = BIND_ADDR, *newroot = NULL;
uid_t user = 0;
int port = PORT, thread_count = THREAD_COUNT;
const char *bind_addr = BIND_ADDR;
int init_ret;
int cache_size = CACHE_SIZE;
int init_ret, chroot_ret, setuid_ret, lookup_ret, chdir_ret;
int setuid_enabled = 0;
int ch;
int fd;
/* XXX: TODO: Process arguments */
argc = argc;
argv = argv;
/* Process arguments */
filed_getopt_long_setopt(&options[0], "port", required_argument, 'p');
filed_getopt_long_setopt(&options[1], "threads", required_argument, 't');
filed_getopt_long_setopt(&options[2], "cache", required_argument, 'c');
filed_getopt_long_setopt(&options[3], "bind", required_argument, 'b');
filed_getopt_long_setopt(&options[4], "user", required_argument, 'u');
filed_getopt_long_setopt(&options[5], "root", required_argument, 'r');
filed_getopt_long_setopt(&options[6], "help", no_argument, 'h');
filed_getopt_long_setopt(&options[7], NULL, 0, 0);
while ((ch = getopt_long(argc, argv, "p:t:c:b:u:r:h", options, NULL)) != -1) {
switch(ch) {
case 'p':
port = atoi(optarg);
break;
case 't':
thread_count = atoi(optarg);
break;
case 'c':
cache_size = atoi(optarg);
break;
case 'b':
bind_addr = strdup(optarg);
break;
case 'u':
setuid_enabled = 1;
lookup_ret = filed_user_lookup(optarg, &user);
if (lookup_ret != 0) {
filed_print_help(stderr, "Invalid username specified");
return(1);
}
break;
case 'r':
newroot = strdup(optarg);
break;
case '?':
case ':':
filed_print_help(stderr, NULL);
return(1);
case 'h':
filed_print_help(stdout, NULL);
return(0);
}
}
/* Create listening socket */
fd = filed_listen(bind_addr, port);
if (fd < 0) {
perror("filed_listen");
return(1);
}
/* Chroot, if appropriate */
if (newroot) {
chdir_ret = chdir(newroot);
if (chdir_ret != 0) {
perror("chdir");
return(1);
}
chroot_ret = chroot(".");
if (chroot_ret != 0) {
perror("chroot");
return(1);
}
}
/* Drop privileges, if appropriate */
if (setuid_enabled) {
setuid_ret = setuid(user);
if (setuid_ret != 0) {
perror("setuid");
return(1);
}
}
/* Become a daemon */
/* XXX:TODO: Become a daemon */
/* Initialize */
init_ret = filed_init();
init_ret = filed_init(cache_size);
if (init_ret != 0) {
perror("filed_init");
return(3);
}
/* Create logging thread */
|