From 92b6026fa55eb1a6d76dfa549e173fc7b863dda5 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Mon, 17 Jul 2017 05:23:45 -0500
Subject: Split out xgetaddrinfo() from xconnect()

---
 lib/lib.h               |  5 +++--
 lib/net.c               | 28 ++++++++++++++++++----------
 toys/net/ftpget.c       |  3 ++-
 toys/other/nbd_client.c |  2 +-
 toys/pending/telnet.c   |  3 ++-
 5 files changed, 26 insertions(+), 15 deletions(-)

diff --git a/lib/lib.h b/lib/lib.h
index 0b93bde9..bb8dfd7f 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -284,8 +284,9 @@ void tty_sigreset(int i);
 // net.c
 int xsocket(int domain, int type, int protocol);
 void xsetsockopt(int fd, int level, int opt, void *val, socklen_t len);
-int xconnect(char *host, char *port, int family, int socktype, int protocol,
-  int flags);
+struct addrinfo *xgetaddrinfo(char *host, char *port, int family, int socktype,
+  int protocol, int flags);
+int xconnect(struct addrinfo *ai_arg);
 int xpoll(struct pollfd *fds, int nfds, int timeout);
 int pollinate(int in1, int in2, int out1, int out2, int timeout, int shutdown_timeout);
 
diff --git a/lib/net.c b/lib/net.c
index df2551f7..5c6d4f7c 100644
--- a/lib/net.c
+++ b/lib/net.c
@@ -15,11 +15,11 @@ void xsetsockopt(int fd, int level, int opt, void *val, socklen_t len)
   if (-1 == setsockopt(fd, level, opt, val, len)) perror_exit("setsockopt");
 }
 
-int xconnect(char *host, char *port, int family, int socktype, int protocol,
-             int flags)
+struct addrinfo *xgetaddrinfo(char *host, char *port, int family, int socktype,
+  int protocol, int flags)
 {
-  struct addrinfo info, *ai, *ai2;
-  int fd;
+  struct addrinfo info, *ai;
+  int rc;
 
   memset(&info, 0, sizeof(struct addrinfo));
   info.ai_family = family;
@@ -27,20 +27,28 @@ int xconnect(char *host, char *port, int family, int socktype, int protocol,
   info.ai_protocol = protocol;
   info.ai_flags = flags;
 
-  fd = getaddrinfo(host, port, &info, &ai);
-  if (fd || !ai)
-    error_exit("Connect '%s%s%s': %s", host, port ? ":" : "", port ? port : "",
-      fd ? gai_strerror(fd) : "not found");
+  rc = getaddrinfo(host, port, &info, &ai);
+  if (rc || !ai)
+    error_exit("%s%s%s: %s", host, port ? ":" : "", port ? port : "",
+      rc ? gai_strerror(rc) : "not found");
+
+  return ai;
+}
+
+int xconnect(struct addrinfo *ai_arg)
+{
+  struct addrinfo *ai;
+  int fd = -1;
 
   // Try all the returned addresses. Report errors if last entry can't connect.
-  for (ai2 = ai; ai; ai = ai->ai_next) {
+  for (ai = ai_arg; ai; ai = ai->ai_next) {
     fd = (ai->ai_next ? socket : xsocket)(ai->ai_family, ai->ai_socktype,
       ai->ai_protocol);
     if (!connect(fd, ai->ai_addr, ai->ai_addrlen)) break;
     else if (!ai->ai_next) perror_exit("connect");
     close(fd);
   }
-  freeaddrinfo(ai2);
+  freeaddrinfo(ai_arg);
 
   return fd;
 }
diff --git a/toys/net/ftpget.c b/toys/net/ftpget.c
index 94e5caed..3c63905e 100644
--- a/toys/net/ftpget.c
+++ b/toys/net/ftpget.c
@@ -107,7 +107,8 @@ void ftpget_main(void)
   if (!remote) remote = toys.optargs[1];
 
   // connect
-  TT.fd = xconnect(*toys.optargs, TT.port, 0, SOCK_STREAM, 0, AI_ADDRCONFIG);
+  TT.fd = xconnect(xgetaddrifo(*toys.optargs, TT.port, 0, SOCK_STREAM, 0,
+    AI_ADDRCONFIG));
   if (getpeername(TT.fd, (void *)&si6, &sl)) perror_exit("getpeername");
 
   // Login
diff --git a/toys/other/nbd_client.c b/toys/other/nbd_client.c
index 3ad366f3..fcd0fca8 100644
--- a/toys/other/nbd_client.c
+++ b/toys/other/nbd_client.c
@@ -52,7 +52,7 @@ void nbd_client_main(void)
 
     // Find and connect to server
 
-    sock = xconnect(host, port, AF_UNSPEC, SOCK_STREAM, 0, 0);
+    sock = xconnect(xgetaddrinfo(host, port, AF_UNSPEC, SOCK_STREAM, 0, 0));
     temp = 1;
     setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &temp, sizeof(int));
 
diff --git a/toys/pending/telnet.c b/toys/pending/telnet.c
index dc3487a5..e37b982c 100644
--- a/toys/pending/telnet.c
+++ b/toys/pending/telnet.c
@@ -306,7 +306,8 @@ void telnet_main(void)
   }
   terminal_size(&TT.win_width, &TT.win_height);
 
-  TT.sfd = xconnect(*toys.optargs, port, 0, SOCK_STREAM, IPPROTO_TCP, 0);
+  TT.sfd = xconnect(xgetaddrinfo(*toys.optargs, port, 0, SOCK_STREAM,
+    IPPROTO_TCP, 0));
   setsockopt(TT.sfd, SOL_SOCKET, SO_REUSEADDR, &set, sizeof(set));
   setsockopt(TT.sfd, SOL_SOCKET, SO_KEEPALIVE, &set, sizeof(set));
 
-- 
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