diff --git a/src/detection/dns/dns_linux.c b/src/detection/dns/dns_linux.c index ea4da8c61..51c2fd643 100644 --- a/src/detection/dns/dns_linux.c +++ b/src/detection/dns/dns_linux.c @@ -3,6 +3,7 @@ #include "common/io/io.h" #include "util/mallocHelper.h" #include "util/stringUtils.h" +#include "util/debug.h" #ifdef __HAIKU__ #define RESOLV_CONF "/system/settings/network/resolv.conf" @@ -10,11 +11,24 @@ #define RESOLV_CONF "/etc/resolv.conf" #endif -const char* ffDetectDNS(FFDNSOptions* options, FFlist* results) +static const char* detectDnsFromConf(const char* path, FFDNSOptions* options, FFlist* results) { - FF_AUTO_CLOSE_FILE FILE* file = fopen(FASTFETCH_TARGET_DIR_ROOT RESOLV_CONF, "r"); + FF_DEBUG("Attempting to read DNS config from %s", path); + + FF_AUTO_CLOSE_FILE FILE* file = fopen(path, "r"); if (!file) - return "fopen (" FASTFETCH_TARGET_DIR_ROOT RESOLV_CONF ") failed"; + { + FF_DEBUG("Failed to open %s: %m", path); + return "fopen(path, r) failed"; + } + + if (results->length > 0) + { + FF_DEBUG("Clearing existing DNS entries (%u entries)", results->length); + FF_LIST_FOR_EACH(FFstrbuf, item, *results) + ffStrbufDestroy(item); + ffListClear(results); + } FF_AUTO_FREE char* line = NULL; size_t len = 0; @@ -38,7 +52,90 @@ const char* ffDetectDNS(FFDNSOptions* options, FFlist* results) FFstrbuf* item = (FFstrbuf*) ffListAdd(results); ffStrbufInitS(item, nameserver); ffStrbufTrimRightSpace(item); + FF_DEBUG("Found DNS server: %s", item->chars); } } + + FF_DEBUG("Found %u DNS servers in %s", results->length, path); + return NULL; +} + +const char* ffDetectDNS(FFDNSOptions* options, FFlist* results) +{ + FF_DEBUG("Starting DNS detection"); + + const char* error = detectDnsFromConf(FASTFETCH_TARGET_DIR_ROOT RESOLV_CONF, options, results); + if (error != NULL) + { + FF_DEBUG("Error detecting DNS: %s", error); + return error; + } + + #if __linux__ && !__ANDROID__ + // Handle different DNS management services + if (results->length == 1) + { + const FFstrbuf* firstEntry = FF_LIST_GET(FFstrbuf, *results, 0); + + if (ffStrbufEqualS(firstEntry, "127.0.0.53")) + { + FF_DEBUG("Detected systemd-resolved (127.0.0.53), checking actual DNS servers"); + // Managed by systemd-resolved + if (detectDnsFromConf("/run/systemd/resolve/resolv.conf", options, results) == NULL) + return NULL; + } + else if (ffStrbufEqualS(firstEntry, "127.0.0.1")) + { + FF_DEBUG("Detected possible NetworkManager (127.0.0.1), checking actual DNS servers"); + // Managed by NetworkManager + if (detectDnsFromConf("/var/run/NetworkManager/resolv.conf", options, results) == NULL) + return NULL; + } + } + + // Check other possible DNS configuration files + if (results->length == 0) + { + FF_DEBUG("No DNS servers found, trying alternative config files"); + + // Try resolvconf + FF_DEBUG("Trying resolvconf configuration"); + if (detectDnsFromConf(FASTFETCH_TARGET_DIR_ROOT "/run/resolvconf/resolv.conf", options, results) == NULL && results->length > 0) + return NULL; + + // Try dnsmasq + FF_DEBUG("Trying dnsmasq configuration"); + if (detectDnsFromConf(FASTFETCH_TARGET_DIR_ROOT "/var/run/dnsmasq/resolv.conf", options, results) == NULL && results->length > 0) + return NULL; + + // Try openresolv + FF_DEBUG("Trying openresolv configuration"); + if (detectDnsFromConf(FASTFETCH_TARGET_DIR_ROOT "/etc/resolv.conf.openresolv", options, results) == NULL && results->length > 0) + return NULL; + } + #elif defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__OpenBSD__) + // Handle BSD-specific DNS configurations + if (results->length == 0) + { + FF_DEBUG("No DNS servers found, trying BSD-specific config files"); + + // FreeBSD and other BSDs may use resolvconf service + FF_DEBUG("Trying BSD resolvconf configuration"); + if (detectDnsFromConf(FASTFETCH_TARGET_DIR_ROOT "/var/run/resolvconf/resolv.conf", options, results) == NULL && results->length > 0) + return NULL; + + // Some BSDs store DNS configuration here + FF_DEBUG("Trying BSD nameserver configuration"); + if (detectDnsFromConf(FASTFETCH_TARGET_DIR_ROOT "/var/run/nameserver", options, results) == NULL && results->length > 0) + return NULL; + + // Try common BSD paths + FF_DEBUG("Trying BSD common paths"); + if (detectDnsFromConf(FASTFETCH_TARGET_DIR_ROOT "/etc/nameserver", options, results) == NULL && results->length > 0) + return NULL; + } + #endif + + FF_DEBUG("DNS detection completed with %u servers found", results->length); return NULL; }