net,pkt: add chunked support

As we don't know the length of the message we want to send to the
other end, we send a chunk size before each message. In later
versions, sending the wants might benefit from batching the lines
together.

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/netops.c b/src/netops.c
index 7d8a7b28c..da242795b 100644
--- a/src/netops.c
+++ b/src/netops.c
@@ -23,6 +23,7 @@
 
 #include "common.h"
 #include "netops.h"
+#include "posix.h"
 
 void gitno_buffer_setup(gitno_buffer *buf, char *data, unsigned int len, int fd)
 {
@@ -138,6 +139,7 @@ int gitno_send(GIT_SOCKET s, const char *msg, size_t len, int flags)
 	return off;
 }
 
+
 #ifdef GIT_WIN32
 int gitno_close(GIT_SOCKET s)
 {
@@ -150,6 +152,20 @@ int gitno_close(GIT_SOCKET s)
 }
 #endif
 
+int gitno_send_chunk_size(int s, size_t len)
+{
+	char str[8] = {0};
+	int ret;
+
+	ret = p_snprintf(str, sizeof(str), "%zx", len);
+	if (ret >= (int) sizeof(str)) {
+		return git__throw(GIT_ESHORTBUFFER, "Your number is too fucking big");
+	}
+
+	return gitno_send(s, str, ret, 0 /* TODO: MSG_MORE */);
+}
+
+
 int gitno_select_in(gitno_buffer *buf, long int sec, long int usec)
 {
 	fd_set fds;