Get ignored interfaces from environment
Add several functions to get a comma separated string from environment,
and parse the string into a set.
Tested: Verify the unit tests passes.
Signed-off-by: Lei YU <yulei.sh@bytedance.com>
Change-Id: I0dd7270d9882cf6fa3ce73d8eac516ae42c61fc0
diff --git a/util.cpp b/util.cpp
index 67a9345..ee76cc3 100644
--- a/util.cpp
+++ b/util.cpp
@@ -9,6 +9,7 @@
#include <sys/wait.h>
#include <algorithm>
+#include <cctype>
#include <cstdlib>
#include <cstring>
#include <filesystem>
@@ -17,6 +18,7 @@
#include <nlohmann/json.hpp>
#include <phosphor-logging/elog-errors.hpp>
#include <phosphor-logging/log.hpp>
+#include <sstream>
#include <stdexcept>
#include <stdplus/raw.hpp>
#include <string>
@@ -91,6 +93,49 @@
}
}
+/** @brief Get ignored interfaces from environment */
+std::string getIgnoredInterfacesEnv()
+{
+ auto r = std::getenv("IGNORED_INTERFACES");
+ if (r == nullptr)
+ {
+ return {};
+ }
+ return r;
+}
+
+/** @brief Parse the comma separated interface names */
+std::set<std::string> parseInterfaces(const std::string& interfaces)
+{
+ std::set<std::string> result;
+ std::stringstream ss(interfaces);
+ while (ss.good())
+ {
+ std::string str;
+ std::getline(ss, str, ',');
+ // Trim str
+ if (!str.empty())
+ {
+ str.erase(
+ std::remove_if(str.begin(), str.end(),
+ [](unsigned char c) { return std::isspace(c); }),
+ str.end());
+ }
+ if (!str.empty())
+ {
+ result.insert(str);
+ }
+ }
+ return result;
+}
+
+/** @brief Get the ignored interfaces */
+const std::set<std::string>& getIgnoredInterfaces()
+{
+ static auto ignoredInterfaces = parseInterfaces(getIgnoredInterfacesEnv());
+ return ignoredInterfaces;
+}
+
} // namespace internal
uint8_t toCidr(int addressFamily, const std::string& subnetMask)