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Merge branch 'jk/always-allow-large-packets'

Browse source 
"git push" and "git fetch" did not communicate an overlong refname
correctly.

* jk/always-allow-large-packets:
  pkt-line: allow writing of LARGE_PACKET_MAX buffers
This commit is contained in:
Junio C Hamano 2014-12-22 12:28:02 -08:00
commit 8ada1d8e9c
2 changed files with 52 additions and 18 deletions
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37
pkt-line.c
View file

@ -64,44 +64,45 @@ void packet_buf_flush(struct strbuf *buf)
}
#define hex(a) (hexchar[(a) & 15])
static char buffer[1000];
static unsigned format_packet(const char *fmt, va_list args)
static void format_packet(struct strbuf *out, const char *fmt, va_list args)
{
static char hexchar[] = "0123456789abcdef";
unsigned n;
size_t orig_len, n;
n = vsnprintf(buffer + 4, sizeof(buffer) - 4, fmt, args);
if (n >= sizeof(buffer)-4)
orig_len = out->len;
strbuf_addstr(out, "0000");
strbuf_vaddf(out, fmt, args);
n = out->len - orig_len;
if (n > LARGE_PACKET_MAX)
die("protocol error: impossibly long line");
n += 4;
buffer[0] = hex(n >> 12);
buffer[1] = hex(n >> 8);
buffer[2] = hex(n >> 4);
buffer[3] = hex(n);
packet_trace(buffer+4, n-4, 1);
return n;
out->buf[orig_len + 0] = hex(n >> 12);
out->buf[orig_len + 1] = hex(n >> 8);
out->buf[orig_len + 2] = hex(n >> 4);
out->buf[orig_len + 3] = hex(n);
packet_trace(out->buf + orig_len + 4, n - 4, 1);
}
void packet_write(int fd, const char *fmt, ...)
{
static struct strbuf buf = STRBUF_INIT;
va_list args;
unsigned n;
strbuf_reset(&buf);
va_start(args, fmt);
n = format_packet(fmt, args);
format_packet(&buf, fmt, args);
va_end(args);
write_or_die(fd, buffer, n);
write_or_die(fd, buf.buf, buf.len);
}
void packet_buf_write(struct strbuf *buf, const char *fmt, ...)
{
va_list args;
unsigned n;
va_start(args, fmt);
n = format_packet(fmt, args);
format_packet(buf, fmt, args);
va_end(args);
strbuf_add(buf, buffer, n);
}
static int get_packet_data(int fd, char **src_buf, size_t *src_size,

33
t/t5527-fetch-odd-refs.sh
View file

@ -26,4 +26,37 @@ test_expect_success 'suffix ref is ignored during fetch' '
test_cmp expect actual
'
test_expect_success 'try to create repo with absurdly long refname' '
ref240=$_z40/$_z40/$_z40/$_z40/$_z40/$_z40 &&
ref1440=$ref240/$ref240/$ref240/$ref240/$ref240/$ref240 &&
git init long &&
(
cd long &&
test_commit long &&
test_commit master
) &&
if git -C long update-ref refs/heads/$ref1440 long; then
test_set_prereq LONG_REF
else
echo >&2 "long refs not supported"
fi
'
test_expect_success LONG_REF 'fetch handles extremely long refname' '
git fetch long refs/heads/*:refs/remotes/long/* &&
cat >expect <<-\EOF &&
long
master
EOF
git for-each-ref --format="%(subject)" refs/remotes/long >actual &&
test_cmp expect actual
'
test_expect_success LONG_REF 'push handles extremely long refname' '
git push long :refs/heads/$ref1440 &&
git -C long for-each-ref --format="%(subject)" refs/heads >actual &&
echo master >expect &&
test_cmp expect actual
'
test_done