From 0fd559ce7967073270dc74b6f35f12e30b6c9057 Mon Sep 17 00:00:00 2001
From: Rolf Ahrenberg <Rolf.Ahrenberg@sci.fi>
Date: Mon, 5 Jan 2015 20:24:45 +0200
Subject: [PATCH] Added a fallback for older glibc libraries.

---
 HISTORY  |  1 +
 socket.c | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/HISTORY b/HISTORY
index 560c950..0e130e4 100644
--- a/HISTORY
+++ b/HISTORY
@@ -94,3 +94,4 @@ VDR Plugin 'satip' Revision History
 - Updated the command-line help and README.
 - Fixed the server teardown.
 - Removed the unnecessary config directory definition.
+- Added a fallback for older glibc libraries.
diff --git a/socket.c b/socket.c
index d6a9e50..358d506 100644
--- a/socket.c
+++ b/socket.c
@@ -136,6 +136,7 @@ int cSatipSocket::Read(unsigned char *bufferAddrP, unsigned int bufferLenP)
 int cSatipSocket::ReadMulti(unsigned char *bufferAddrP, unsigned int *elementRecvSizeP, unsigned int elementCountP, unsigned int elementBufferSizeP)
 {
   debug16("%s (, , %d, %d)", __PRETTY_FUNCTION__, elementCountP, elementBufferSizeP);
+#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2,12)
   // Error out if socket not initialized
   if (socketDescM <= 0) {
      error("%s Invalid socket", __PRETTY_FUNCTION__);
@@ -159,6 +160,17 @@ int cSatipSocket::ReadMulti(unsigned char *bufferAddrP, unsigned int *elementRec
   ERROR_IF_RET(count < 0 && errno != EAGAIN && errno != EWOULDBLOCK, "recvmmsg()", return -1);
   for (int i = 0; i < count; ++i)
       elementRecvSizeP[i] = mmsgh[i].msg_len;
+#else
+  int count = 0;
+  while (count < (int)elementCountP) {
+        int len = Read(bufferAddrP + count * elementBufferSizeP, elementBufferSizeP);
+        if (len < 0)
+           return -1;
+        else if (len == 0)
+           break;
+        elementRecvSizeP[count++] = len;
+        }
+#endif
   debug16("%s Received %d packets size[0]=%d", __PRETTY_FUNCTION__, count, elementRecvSizeP[0]);
 
   return count;