release/src/router/httpd/log.c

   1 /*
   2
   3         Tomato Firmware
   4         Copyright (C) 2006-2009 Jonathan Zarate
   5
   6 */
   7
   8 #include "tomato.h"
   9
  10 #include <ctype.h>
  11 #include <netinet/in.h>
  12 #include <arpa/inet.h>
  13 #include <netdb.h>
  14
  15 /* Max number of log lines for GUI to display */
  16 #define MAX_LOG_LINES   2000
  17
  18 static int logok(void)
  19 {
  20         if (nvram_match("log_file", "1")) return 1;
  21         resmsg_set("Internal logging disabled");
  22         redirect("error.asp");
  23         return 0;
  24 }
  25
  26 /* Figure out & return the logfile name. */
  27 void get_logfilename(char *lfn)
  28 {
  29         char *p;
  30         char cfg[256];
  31         char *nv;
  32
  33         nv = "/var/log/messages";
  34         if (f_read_string("/etc/syslogd.cfg", cfg, sizeof(cfg)) > 0) {
  35                 if ((p = strchr(cfg, '\n')))
  36                         *p = 0;
  37                 strtok(cfg, " \t");     // skip rotsize
  38                 strtok(NULL, " \t");    // Skip backup cnt
  39                 if ((p = strtok(NULL, " \t")) && (*p == '/')) {
  40                         // check if we can write to the file
  41                         if (f_write(p, cfg, 0, FW_APPEND, 0) >= 0) {
  42                                 nv = p; // nv is the configured log filename
  43                         }
  44                 }
  45         }
  46         if (lfn)
  47                 strcpy(lfn, nv);
  48 }
  49
  50 void wo_viewlog(char *url)
  51 {
  52         char *p;
  53         char *c;
  54         char s[128];
  55         char t[128];
  56         int n;
  57         char lfn[256];
  58
  59         if (!logok()) return;
  60
  61         get_logfilename(lfn);
  62         if ((p = webcgi_get("find")) != NULL) {
  63                 send_header(200, NULL, mime_plain, 0);
  64                 if (strlen(p) > 64) return;
  65                 c = t;
  66                 while (*p) {
  67                         switch (*p) {
  68                         case '<':
  69                         case '>':
  70                         case '|':
  71                         case '"':
  72                         case '\\':
  73                                 *c++ = '\\';
  74                                 *c++ = *p;
  75                                 break;
  76                         default:
  77                                 if (isprint(*p)) *c++ = *p;
  78                                 break;
  79                         }
  80                         ++p;
  81                 }
  82                 *c = 0;
  83                 sprintf(s, "grep -ih \"%s\" $(ls -1rv %s %s.*)", t, lfn, lfn);
  84                 web_pipecmd(s, WOF_NONE);
  85                 return;
  86         }
  87
  88         if ((p = webcgi_get("which")) == NULL) return;
  89
  90         if (strcmp(p, "all") == 0)
  91                 n = MAX_LOG_LINES;
  92         else if ((n = atoi(p)) <= 0)
  93                 return;
  94
  95         send_header(200, NULL, mime_plain, 0);
  96         sprintf(s, "cat $(ls -1rv %s %s.*) | tail -n %d", lfn, lfn, n);
  97         web_pipecmd(s, WOF_NONE);
  98 }
  99
 100 static void webmon_list(char *name, int webmon, int resolve, unsigned int maxcount)
 101 {
 102         FILE *f;
 103         char s[512], ip[64], val[256];
 104         char *js, *jh;
 105         char comma;
 106         unsigned long time;
 107         unsigned int i;
 108         char host[NI_MAXHOST];
 109
 110         web_printf("\nwm_%s = [", name);
 111
 112         if (webmon) {
 113                 sprintf(s, "/proc/webmon_recent_%s", name);
 114                 if ((f = fopen(s, "r")) != NULL) {
 115                         comma = ' ';
 116                         i = 0;
 117                         while ((!maxcount || i++ < maxcount) && fgets(s, sizeof(s), f)) {
 118                                 if (sscanf(s, "%lu\t%s\t%s", &time, ip, val) != 3) continue;
 119                                 jh = NULL;
 120                                 if (resolve) {
 121                                         if (resolve_addr(ip, host) == 0)
 122                                                 jh = js_string(host);
 123                                 }
 124                                 js = utf8_to_js_string(val);
 125                                 web_printf("%c['%lu','%s','%s', '%s']", comma,
 126                                         time, ip, js ? : "", jh ? : "");
 127                                 free(js);
 128                                 free(jh);
 129                                 comma = ',';
 130                         }
 131                         fclose(f);
 132                 }
 133         }
 134
 135         web_puts("];\n");
 136 }
 137
 138 void asp_webmon(int argc, char **argv)
 139 {
 140         int webmon = nvram_get_int("log_wm");
 141         int maxcount = (argc > 0) ? atoi(argv[0]) : 0;
 142         int resolve = (argc > 1) ? atoi(argv[1]) : 0;
 143
 144         webmon_list("domains", webmon, resolve, maxcount);
 145         webmon_list("searches", webmon, resolve, maxcount);
 146 }
 147
 148 void wo_webmon(char *url)
 149 {
 150         nvram_set("log_wmclear", webcgi_get("clear"));
 151         exec_service("firewall-restart");
 152         nvram_unset("log_wmclear");
 153 }
 154
 155 static int webmon_ok(int searches)
 156 {
 157         if (nvram_get_int("log_wm") && nvram_get_int(searches ? "log_wmsmax" : "log_wmdmax") > 0) return 1;
 158         resmsg_set("Web Monitoring disabled");
 159         redirect("error.asp");
 160         return 0;
 161 }
 162
 163 void wo_syslog(char *url)
 164 {
 165         char lfn[256];
 166         char s[128];
 167
 168         get_logfilename(lfn);
 169         if (strncmp(url, "webmon_", 7) == 0) {
 170                 // web monitor
 171                 char file[64];
 172                 snprintf(file, sizeof(file), "/proc/%s", url);
 173                 if (!webmon_ok(strstr(url, "searches") != NULL)) return;
 174                 send_header(200, NULL, mime_binary, 0);
 175                 do_file(file);
 176         }
 177         else {
 178                 // syslog
 179                 if (!logok()) return;
 180                 send_header(200, NULL, mime_binary, 0);
 181                 sprintf(s, "cat $(ls -1rv %s %s.*)", lfn, lfn);
 182                 web_pipecmd(s, WOF_NONE);
 183         }
 184 }