network status

2 files changed, 105 insertions, 0 deletions

diff --git a/src/utils.c b/src/utils.c
new file mode 100644
index 0000000..b7e421d
--- /dev/null
+++ b/src/utils.c
@@ -0,0 +1,90 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+
+#include "config.h"
+
+#ifdef HAVE_RESOLVE
+#include <resolv.h>
+#endif
+
+
+int
+utGetDefaultGwInfo(char **szDevPtr, char **szIpPtr)
+{
+  FILE *f;
+  char line[100];
+  char *p, *c, *g;
+  char *saveptr;
+  int ret = 1;
+
+  f = fopen("/proc/net/route" , "r");
+  while (fgets(line , 100 , f)) {
+    p = strtok_r(line , " \t", &saveptr);
+    c = strtok_r(NULL , " \t", &saveptr);
+    g = strtok_r(NULL , " \t", &saveptr);
+
+    if (p && c) {
+      if (strcmp(c , "00000000") == 0) {
+        *szDevPtr = calloc(IFNAMSIZ, sizeof(char));
+        memcpy(*szDevPtr, p, IFNAMSIZ-1);
+        *szIpPtr = NULL;
+        if (g) {
+          char *pEnd;
+          int ng = strtol(g,&pEnd,16);
+          struct in_addr addr;
+          addr.s_addr = ng;
+          *szIpPtr = calloc(IFNAMSIZ, sizeof(char));
+          memcpy(*szIpPtr, inet_ntoa(addr), IFNAMSIZ-1);
+          ret = 0;
+        }
+        break;
+      }
+    }
+  }
+  fclose(f);
+  return ret;
+}
+
+int
+utGetIpFromNetDev(char *netdev, char **szIpPtr)
+{
+  int fd;
+  struct ifreq ifr;
+  int ret = 1;
+
+  memset(&ifr, '\0', sizeof(struct ifreq));
+  fd = socket(AF_INET, SOCK_DGRAM, 0);
+  ifr.ifr_addr.sa_family = AF_INET;
+  strncpy(ifr.ifr_name, netdev, IFNAMSIZ-1);
+  if (ioctl(fd, SIOCGIFADDR, &ifr) != -1) {
+    *szIpPtr = calloc(IFNAMSIZ, sizeof(char));
+    memcpy(*szIpPtr, inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr), IFNAMSIZ-1);
+    ret = 0;
+  }
+  close(fd);
+  return ret;
+}
+
+#ifdef HAVE_RESOLVE
+int
+utGetDomainInfo(char **szDefDomain, char **szDefServer)
+{
+  if (res_init() != 0)
+    return 1;
+  *szDefDomain = calloc(257, sizeof(char));
+  memcpy(*szDefDomain, _res.defdname, 256);
+  *szDefServer = calloc(IFNAMSIZ, sizeof(char));
+  memcpy(*szDefServer, inet_ntoa(_res.nsaddr_list[0].sin_addr), IFNAMSIZ-1);
+  res_close();
+  return 0;
+}
+#endif
diff --git a/src/utils.h b/src/utils.h
new file mode 100644
index 0000000..ffde45d
--- /dev/null
+++ b/src/utils.h
@@ -0,0 +1,15 @@
+#ifndef UTILS_H
+#define UTILS_H 1
+
+int
+utGetDefaultGwInfo(char **szDevPtr, char **szIpPtr);
+
+int
+utGetIpFromNetDev(char *netdev, char **szIpPtr);
+
+#ifdef HAVE_RESOLVE
+int
+utGetDomainInfo(char **szDefDomain, char **szDefServer);
+#endif
+
+#endif