3 #include "run-command.h"
5 char packet_buffer
[LARGE_PACKET_MAX
];
6 static const char *packet_trace_prefix
= "git";
7 static struct trace_key trace_packet
= TRACE_KEY_INIT(PACKET
);
8 static struct trace_key trace_pack
= TRACE_KEY_INIT(PACKFILE
);
10 void packet_trace_identity(const char *prog
)
12 packet_trace_prefix
= xstrdup(prog
);
15 static const char *get_trace_prefix(void)
17 return in_async() ? "sideband" : packet_trace_prefix
;
20 static int packet_trace_pack(const char *buf
, unsigned int len
, int sideband
)
23 trace_verbatim(&trace_pack
, buf
, len
);
25 } else if (len
&& *buf
== '\1') {
26 trace_verbatim(&trace_pack
, buf
+ 1, len
- 1);
29 /* it's another non-pack sideband */
34 static void packet_trace(const char *buf
, unsigned int len
, int write
)
38 static int in_pack
, sideband
;
40 if (!trace_want(&trace_packet
) && !trace_want(&trace_pack
))
44 if (packet_trace_pack(buf
, len
, sideband
))
46 } else if (starts_with(buf
, "PACK") || starts_with(buf
, "\1PACK")) {
48 sideband
= *buf
== '\1';
49 packet_trace_pack(buf
, len
, sideband
);
52 * Make a note in the human-readable trace that the pack data
59 if (!trace_want(&trace_packet
))
62 /* +32 is just a guess for header + quoting */
63 strbuf_init(&out
, len
+32);
65 strbuf_addf(&out
, "packet: %12s%c ",
66 get_trace_prefix(), write
? '>' : '<');
68 /* XXX we should really handle printable utf8 */
69 for (i
= 0; i
< len
; i
++) {
70 /* suppress newlines */
73 if (buf
[i
] >= 0x20 && buf
[i
] <= 0x7e)
74 strbuf_addch(&out
, buf
[i
]);
76 strbuf_addf(&out
, "\\%o", buf
[i
]);
79 strbuf_addch(&out
, '\n');
80 trace_strbuf(&trace_packet
, &out
);
85 * If we buffered things up above (we don't, but we should),
88 void packet_flush(int fd
)
90 packet_trace("0000", 4, 1);
91 write_or_die(fd
, "0000", 4);
94 int packet_flush_gently(int fd
)
96 packet_trace("0000", 4, 1);
97 if (write_in_full(fd
, "0000", 4) == 4)
99 return error("flush packet write failed");
102 void packet_buf_flush(struct strbuf
*buf
)
104 packet_trace("0000", 4, 1);
105 strbuf_add(buf
, "0000", 4);
108 static void set_packet_header(char *buf
, const int size
)
110 static char hexchar
[] = "0123456789abcdef";
112 #define hex(a) (hexchar[(a) & 15])
113 buf
[0] = hex(size
>> 12);
114 buf
[1] = hex(size
>> 8);
115 buf
[2] = hex(size
>> 4);
120 static void format_packet(struct strbuf
*out
, const char *fmt
, va_list args
)
125 strbuf_addstr(out
, "0000");
126 strbuf_vaddf(out
, fmt
, args
);
127 n
= out
->len
- orig_len
;
129 if (n
> LARGE_PACKET_MAX
)
130 die("protocol error: impossibly long line");
132 set_packet_header(&out
->buf
[orig_len
], n
);
133 packet_trace(out
->buf
+ orig_len
+ 4, n
- 4, 1);
136 static int packet_write_fmt_1(int fd
, int gently
,
137 const char *fmt
, va_list args
)
139 struct strbuf buf
= STRBUF_INIT
;
142 format_packet(&buf
, fmt
, args
);
143 count
= write_in_full(fd
, buf
.buf
, buf
.len
);
144 if (count
== buf
.len
)
149 die_errno("packet write with format failed");
151 return error("packet write with format failed");
154 void packet_write_fmt(int fd
, const char *fmt
, ...)
159 packet_write_fmt_1(fd
, 0, fmt
, args
);
163 int packet_write_fmt_gently(int fd
, const char *fmt
, ...)
169 status
= packet_write_fmt_1(fd
, 1, fmt
, args
);
174 static int packet_write_gently(const int fd_out
, const char *buf
, size_t size
)
176 static char packet_write_buffer
[LARGE_PACKET_MAX
];
179 if (size
> sizeof(packet_write_buffer
) - 4)
180 return error("packet write failed - data exceeds max packet size");
182 packet_trace(buf
, size
, 1);
183 packet_size
= size
+ 4;
184 set_packet_header(packet_write_buffer
, packet_size
);
185 memcpy(packet_write_buffer
+ 4, buf
, size
);
186 if (write_in_full(fd_out
, packet_write_buffer
, packet_size
) == packet_size
)
188 return error("packet write failed");
191 void packet_buf_write(struct strbuf
*buf
, const char *fmt
, ...)
196 format_packet(buf
, fmt
, args
);
200 static int get_packet_data(int fd
, char **src_buf
, size_t *src_size
,
201 void *dst
, unsigned size
, int options
)
205 if (fd
>= 0 && src_buf
&& *src_buf
)
206 die("BUG: multiple sources given to packet_read");
208 /* Read up to "size" bytes from our source, whatever it is. */
209 if (src_buf
&& *src_buf
) {
210 ret
= size
< *src_size
? size
: *src_size
;
211 memcpy(dst
, *src_buf
, ret
);
215 ret
= read_in_full(fd
, dst
, size
);
217 die_errno("read error");
220 /* And complain if we didn't get enough bytes to satisfy the read. */
222 if (options
& PACKET_READ_GENTLE_ON_EOF
)
225 die("The remote end hung up unexpectedly");
231 static int packet_length(const char *linelen
)
233 int val
= hex2chr(linelen
);
234 return (val
< 0) ? val
: (val
<< 8) | hex2chr(linelen
+ 2);
237 int packet_read(int fd
, char **src_buf
, size_t *src_len
,
238 char *buffer
, unsigned size
, int options
)
243 ret
= get_packet_data(fd
, src_buf
, src_len
, linelen
, 4, options
);
246 len
= packet_length(linelen
);
248 die("protocol error: bad line length character: %.4s", linelen
);
250 packet_trace("0000", 4, 0);
255 die("protocol error: bad line length %d", len
);
256 ret
= get_packet_data(fd
, src_buf
, src_len
, buffer
, len
, options
);
260 if ((options
& PACKET_READ_CHOMP_NEWLINE
) &&
261 len
&& buffer
[len
-1] == '\n')
265 packet_trace(buffer
, len
, 0);
269 static char *packet_read_line_generic(int fd
,
270 char **src
, size_t *src_len
,
273 int len
= packet_read(fd
, src
, src_len
,
274 packet_buffer
, sizeof(packet_buffer
),
275 PACKET_READ_CHOMP_NEWLINE
);
278 return len
? packet_buffer
: NULL
;
281 char *packet_read_line(int fd
, int *len_p
)
283 return packet_read_line_generic(fd
, NULL
, NULL
, len_p
);
286 char *packet_read_line_buf(char **src
, size_t *src_len
, int *dst_len
)
288 return packet_read_line_generic(-1, src
, src_len
, dst_len
);