From 12def527cd08192fd957768ca9c42765bdd3413b Mon Sep 17 00:00:00 2001
From: correabuscar <correabuscar+githubcommits@gmail.com>
Date: Sun, 6 Nov 2022 11:36:22 +0100
Subject: [PATCH] FreeBSD: replace getnameinfo with inet_ntop

also make IPv6 work.
---
 src/freebsd/btop_collect.cpp | 33 +++++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

diff --git a/src/freebsd/btop_collect.cpp b/src/freebsd/btop_collect.cpp
index f6d51b2..34d04bf 100644
--- a/src/freebsd/btop_collect.cpp
+++ b/src/freebsd/btop_collect.cpp
@@ -27,6 +27,7 @@ tab-size = 4
 #include <net/route.h>
 #include <netdb.h>
 #include <netinet/tcp_fsm.h>
+#include <netinet/in.h> // for inet_ntop stuff
 #include <pwd.h>
 #include <sys/_timeval.h>
 #include <sys/endian.h>
@@ -821,7 +822,9 @@ namespace Net {
 				return empty_net;
 			}
 			int family = 0;
-			char ip[NI_MAXHOST];
+			static_assert(INET6_ADDRSTRLEN >= INET_ADDRSTRLEN); // 46 >= 16, compile-time assurance.
+			enum { IPBUFFER_MAXSIZE = INET6_ADDRSTRLEN }; // manually using the known biggest value, guarded by the above static_assert
+			char ip[IPBUFFER_MAXSIZE];
 			interfaces.clear();
 			string ipv4, ipv6;
 
@@ -843,17 +846,27 @@ namespace Net {
 				}
 				//? Get IPv4 address
 				if (family == AF_INET) {
-					if (net[iface].ipv4.empty() and
-						getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr), ip, NI_MAXHOST, NULL, 0, NI_NUMERICHOST) == 0)
-						net[iface].ipv4 = ip;
+					if (net[iface].ipv4.empty()) {
+						if (NULL != inet_ntop(family, &(reinterpret_cast<struct sockaddr_in*>(ifa->ifa_addr)->sin_addr), ip, IPBUFFER_MAXSIZE)) {
+
+							net[iface].ipv4 = ip;
+						} else {
+							int errsv = errno;
+							Logger::error("Net::collect() -> Failed to convert IPv4 to string for iface " + string(iface) + ", errno: " + strerror(errsv));
+						}
+					}
 				}
 				//? Get IPv6 address
-				// else if (family == AF_INET6) {
-				// 	if (net[iface].ipv6.empty() and
-				// 		getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6), ip, NI_MAXHOST, NULL, 0, NI_NUMERICHOST) == 0)
-				// 		net[iface].ipv6 = ip;
-				// }
-
+				else if (family == AF_INET6) {
+					if (net[iface].ipv6.empty()) {
+						if (NULL != inet_ntop(family, &(reinterpret_cast<struct sockaddr_in6*>(ifa->ifa_addr)->sin6_addr), ip, IPBUFFER_MAXSIZE)) {
+							net[iface].ipv6 = ip;
+						} else {
+							int errsv = errno;
+							Logger::error("Net::collect() -> Failed to convert IPv6 to string for iface " + string(iface) + ", errno: " + strerror(errsv));
+						}
+					}
+				}
 			}
 
 			unordered_flat_map<string, std::tuple<uint64_t, uint64_t>> ifstats;