LocalIP: detect MTU

fastfetch-cli · Jun 14, 2024 · 5539fec · 5539fec
1 parent cff2a18
commit 5539fec
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Showing 4 changed files with 21 additions and 1 deletion.
diff --git a/src/detection/localip/localip.h b/src/detection/localip/localip.h
@@ -8,6 +8,7 @@ typedef struct FFLocalIpResult
  FFstrbuf ipv4;
  FFstrbuf ipv6;
  FFstrbuf mac;
+ int32_t mtu;
  bool defaultRoute;
 } FFLocalIpResult;
 

diff --git a/src/detection/localip/localip_linux.c b/src/detection/localip/localip_linux.c
@@ -10,6 +10,7 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <stdio.h>
+#include <sys/ioctl.h>
 
 #if defined(__FreeBSD__) || defined(__APPLE__)
 #include <net/if_dl.h>
@@ -35,6 +36,7 @@ static void addNewIp(FFlist* list, const char* name, const char* addr, int type,
  ffStrbufInit(&ip->ipv6);
  ffStrbufInit(&ip->mac);
  ip->defaultRoute = defaultRoute;
+ ip->mtu = -1;
  }
 
  switch (type)
@@ -160,5 +162,17 @@ const char* ffDetectLocalIps(const FFLocalIpOptions* options, FFlist* results)
 
  if (ifAddrStruct) freeifaddrs(ifAddrStruct);
 
+ FF_AUTO_CLOSE_FD int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (sockfd > 0)
+ {
+ FF_LIST_FOR_EACH(FFLocalIpResult, iface, *results)
+ {
+ struct ifreq ifr = {};
+ strncpy(ifr.ifr_name, iface->name.chars, IFNAMSIZ - 1);
+ if (ioctl(sockfd, SIOCGIFMTU, &ifr) == 0)
+ iface->mtu = ifr.ifr_mtu;
+ }
+ }
+
  return NULL;
 }
diff --git a/src/detection/localip/localip_windows.c b/src/detection/localip/localip_windows.c
@@ -18,10 +18,11 @@ static void addNewIp(FFlist* list, const char* name, const char* addr, int type,
  ffStrbufInit(&ip->ipv6);
  ffStrbufInit(&ip->mac);
  ip->defaultRoute = defaultRoute;
+ ip->mtu = -1;
  }
  else
  {
- ip = ffListGet(list, list->length - 1);
+ ip = FF_LIST_GET(FFLocalIpResult, *list, list->length - 1);
  }
 
  switch (type)
@@ -147,6 +148,9 @@ const char* ffDetectLocalIps(const FFLocalIpOptions* options, FFlist* results)
  if (typesToAdd == 0) break;
  }
  }
+
+ if (!newIp)
+ FF_LIST_GET(FFLocalIpResult, *results, results->length - 1)->mtu = (int32_t) adapter->Mtu;
  }
 
  return NULL;

diff --git a/src/modules/localip/localip.c b/src/modules/localip/localip.c
@@ -373,6 +373,7 @@ void ffGenerateLocalIpJsonResult(FF_MAYBE_UNUSED FFLocalIpOptions* options, yyjs
  yyjson_mut_obj_add_strbuf(doc, obj, "ipv6", &ip->ipv6);
  yyjson_mut_obj_add_strbuf(doc, obj, "mac", &ip->mac);
  yyjson_mut_obj_add_strbuf(doc, obj, "name", &ip->name);
+ yyjson_mut_obj_add_int(doc, obj, "mtu", ip->mtu);
  }
 
  FF_LIST_FOR_EACH(FFLocalIpResult, ip, results)