From 1b098239eb59917add4aa53e902172813f7de5c4 Mon Sep 17 00:00:00 2001
From: Omar Polo <op@omarpolo.com>
Date: Sat, 3 Aug 2024 14:02:00 +0000
Subject: gg: support IPv6 addresses in -P

---
 gg.1 |  1 +
 gg.c | 23 ++++++++++++++---------
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/gg.1 b/gg.1
index 0483a06..19eaa18 100644
--- a/gg.1
+++ b/gg.1
@@ -82,6 +82,7 @@ and
 to do the request instead of the ones extracted by the IRI.
 .Ar port
 is by default 1965.
+IPv6 addresses have to be wrapped in braces, for e.g. [::1].
 .It Fl q
 Don't print server error messages to standard error.
 .It Fl T Ar seconds
diff --git a/gg.c b/gg.c
index 5ca3fc7..5b14e9f 100644
--- a/gg.c
+++ b/gg.c
@@ -362,22 +362,27 @@ parse_debug(const char *arg)
 }
 
 static void
-parse_proxy(const char *arg)
+parse_proxy(char *arg)
 {
 	char *at;
 
-	if ((proxy_host = strdup(arg)) == NULL)
-		err(1, "strdup");
-
+	proxy_host = arg;
 	proxy_port = "1965";
 
-	if ((at = strchr(proxy_host, ':')) == NULL)
+	if (*proxy_host == '[') {
+		if ((at = strchr(proxy_host, ']')) == NULL)
+			errx(1, "invalid host: %s", proxy_host);
+		proxy_host++;
+		*at++ = '\0';
+		if (*at == '\0')
+			return;
+		if (*at != ':')
+			errx(1, "invalid port specification: %s", at);
+	} else if ((at = strchr(proxy_host, ':')) == NULL)
 		return;
-	*at = '\0';
-	proxy_port = ++at;
 
-	if (strchr(proxy_port, ':') != NULL)
-		errx(1, "invalid port %s", proxy_port);
+	*at++ = '\0';
+	proxy_port = at;
 }
 
 int
-- 
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