Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 1 | #include "cache.h" |
| 2 | #include "pkt-line.h" |
Jeff King | fd89433 | 2015-09-01 16:24:13 -0400 | [diff] [blame] | 3 | #include "run-command.h" |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 4 | |
Jeff King | 74543a0 | 2013-02-20 15:02:57 -0500 | [diff] [blame] | 5 | char packet_buffer[LARGE_PACKET_MAX]; |
Stephen Boyd | 1e4cd68 | 2011-04-03 00:06:54 -0700 | [diff] [blame] | 6 | static const char *packet_trace_prefix = "git"; |
Karsten Blees | 6aa3085 | 2014-07-12 02:00:06 +0200 | [diff] [blame] | 7 | static struct trace_key trace_packet = TRACE_KEY_INIT(PACKET); |
Jeff King | 3235983 | 2015-06-16 13:23:20 -0400 | [diff] [blame] | 8 | static struct trace_key trace_pack = TRACE_KEY_INIT(PACKFILE); |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 9 | |
| 10 | void packet_trace_identity(const char *prog) |
| 11 | { |
| 12 | packet_trace_prefix = xstrdup(prog); |
| 13 | } |
| 14 | |
Jeff King | fd89433 | 2015-09-01 16:24:13 -0400 | [diff] [blame] | 15 | static const char *get_trace_prefix(void) |
| 16 | { |
| 17 | return in_async() ? "sideband" : packet_trace_prefix; |
| 18 | } |
| 19 | |
Jeff King | 3235983 | 2015-06-16 13:23:20 -0400 | [diff] [blame] | 20 | static int packet_trace_pack(const char *buf, unsigned int len, int sideband) |
| 21 | { |
| 22 | if (!sideband) { |
| 23 | trace_verbatim(&trace_pack, buf, len); |
| 24 | return 1; |
| 25 | } else if (len && *buf == '\1') { |
| 26 | trace_verbatim(&trace_pack, buf + 1, len - 1); |
| 27 | return 1; |
| 28 | } else { |
| 29 | /* it's another non-pack sideband */ |
| 30 | return 0; |
| 31 | } |
| 32 | } |
| 33 | |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 34 | static void packet_trace(const char *buf, unsigned int len, int write) |
| 35 | { |
| 36 | int i; |
| 37 | struct strbuf out; |
Jeff King | 3235983 | 2015-06-16 13:23:20 -0400 | [diff] [blame] | 38 | static int in_pack, sideband; |
| 39 | |
| 40 | if (!trace_want(&trace_packet) && !trace_want(&trace_pack)) |
| 41 | return; |
| 42 | |
| 43 | if (in_pack) { |
| 44 | if (packet_trace_pack(buf, len, sideband)) |
| 45 | return; |
| 46 | } else if (starts_with(buf, "PACK") || starts_with(buf, "\1PACK")) { |
| 47 | in_pack = 1; |
| 48 | sideband = *buf == '\1'; |
| 49 | packet_trace_pack(buf, len, sideband); |
| 50 | |
| 51 | /* |
| 52 | * Make a note in the human-readable trace that the pack data |
| 53 | * started. |
| 54 | */ |
| 55 | buf = "PACK ..."; |
| 56 | len = strlen(buf); |
| 57 | } |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 58 | |
Karsten Blees | 6aa3085 | 2014-07-12 02:00:06 +0200 | [diff] [blame] | 59 | if (!trace_want(&trace_packet)) |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 60 | return; |
| 61 | |
| 62 | /* +32 is just a guess for header + quoting */ |
| 63 | strbuf_init(&out, len+32); |
| 64 | |
| 65 | strbuf_addf(&out, "packet: %12s%c ", |
Jeff King | fd89433 | 2015-09-01 16:24:13 -0400 | [diff] [blame] | 66 | get_trace_prefix(), write ? '>' : '<'); |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 67 | |
Jeff King | 3235983 | 2015-06-16 13:23:20 -0400 | [diff] [blame] | 68 | /* XXX we should really handle printable utf8 */ |
| 69 | for (i = 0; i < len; i++) { |
| 70 | /* suppress newlines */ |
| 71 | if (buf[i] == '\n') |
| 72 | continue; |
| 73 | if (buf[i] >= 0x20 && buf[i] <= 0x7e) |
| 74 | strbuf_addch(&out, buf[i]); |
| 75 | else |
| 76 | strbuf_addf(&out, "\\%o", buf[i]); |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | strbuf_addch(&out, '\n'); |
Karsten Blees | 6aa3085 | 2014-07-12 02:00:06 +0200 | [diff] [blame] | 80 | trace_strbuf(&trace_packet, &out); |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 81 | strbuf_release(&out); |
| 82 | } |
| 83 | |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 84 | /* |
| 85 | * If we buffered things up above (we don't, but we should), |
| 86 | * we'd flush it here |
| 87 | */ |
| 88 | void packet_flush(int fd) |
| 89 | { |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 90 | packet_trace("0000", 4, 1); |
Jeff King | 37c8001 | 2019-03-04 23:11:39 -0500 | [diff] [blame] | 91 | if (write_in_full(fd, "0000", 4) < 0) |
| 92 | die_errno(_("unable to write flush packet")); |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 93 | } |
| 94 | |
Brandon Williams | a4cfd41 | 2018-03-14 11:31:40 -0700 | [diff] [blame] | 95 | void packet_delim(int fd) |
| 96 | { |
| 97 | packet_trace("0001", 4, 1); |
Jeff King | 37c8001 | 2019-03-04 23:11:39 -0500 | [diff] [blame] | 98 | if (write_in_full(fd, "0001", 4) < 0) |
| 99 | die_errno(_("unable to write delim packet")); |
Brandon Williams | a4cfd41 | 2018-03-14 11:31:40 -0700 | [diff] [blame] | 100 | } |
| 101 | |
Lars Schneider | 038ce90 | 2016-10-16 16:20:32 -0700 | [diff] [blame] | 102 | int packet_flush_gently(int fd) |
| 103 | { |
| 104 | packet_trace("0000", 4, 1); |
Jeff King | 4c95e3d | 2017-09-13 13:17:30 -0400 | [diff] [blame] | 105 | if (write_in_full(fd, "0000", 4) < 0) |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 106 | return error(_("flush packet write failed")); |
Jeff King | 4c95e3d | 2017-09-13 13:17:30 -0400 | [diff] [blame] | 107 | return 0; |
Lars Schneider | 038ce90 | 2016-10-16 16:20:32 -0700 | [diff] [blame] | 108 | } |
| 109 | |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 110 | void packet_buf_flush(struct strbuf *buf) |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 111 | { |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 112 | packet_trace("0000", 4, 1); |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 113 | strbuf_add(buf, "0000", 4); |
| 114 | } |
| 115 | |
Brandon Williams | a4cfd41 | 2018-03-14 11:31:40 -0700 | [diff] [blame] | 116 | void packet_buf_delim(struct strbuf *buf) |
| 117 | { |
| 118 | packet_trace("0001", 4, 1); |
| 119 | strbuf_add(buf, "0001", 4); |
| 120 | } |
| 121 | |
Junio C Hamano | 56bea28 | 2019-05-15 10:42:35 +0900 | [diff] [blame] | 122 | void set_packet_header(char *buf, int size) |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 123 | { |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 124 | static char hexchar[] = "0123456789abcdef"; |
Lars Schneider | 2f60bdd | 2016-10-16 16:20:30 -0700 | [diff] [blame] | 125 | |
| 126 | #define hex(a) (hexchar[(a) & 15]) |
| 127 | buf[0] = hex(size >> 12); |
| 128 | buf[1] = hex(size >> 8); |
| 129 | buf[2] = hex(size >> 4); |
| 130 | buf[3] = hex(size); |
| 131 | #undef hex |
| 132 | } |
| 133 | |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 134 | static void format_packet(struct strbuf *out, const char *prefix, |
| 135 | const char *fmt, va_list args) |
Lars Schneider | 2f60bdd | 2016-10-16 16:20:30 -0700 | [diff] [blame] | 136 | { |
Jeff King | 8e9faf2 | 2014-12-10 04:47:02 -0500 | [diff] [blame] | 137 | size_t orig_len, n; |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 138 | |
Jeff King | 8e9faf2 | 2014-12-10 04:47:02 -0500 | [diff] [blame] | 139 | orig_len = out->len; |
| 140 | strbuf_addstr(out, "0000"); |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 141 | strbuf_addstr(out, prefix); |
Jeff King | 8e9faf2 | 2014-12-10 04:47:02 -0500 | [diff] [blame] | 142 | strbuf_vaddf(out, fmt, args); |
| 143 | n = out->len - orig_len; |
| 144 | |
| 145 | if (n > LARGE_PACKET_MAX) |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 146 | die(_("protocol error: impossibly long line")); |
Jeff King | 8e9faf2 | 2014-12-10 04:47:02 -0500 | [diff] [blame] | 147 | |
Lars Schneider | 2f60bdd | 2016-10-16 16:20:30 -0700 | [diff] [blame] | 148 | set_packet_header(&out->buf[orig_len], n); |
Jeff King | 8e9faf2 | 2014-12-10 04:47:02 -0500 | [diff] [blame] | 149 | packet_trace(out->buf + orig_len + 4, n - 4, 1); |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 150 | } |
| 151 | |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 152 | static int packet_write_fmt_1(int fd, int gently, const char *prefix, |
Lars Schneider | 70428d1 | 2016-10-16 16:20:31 -0700 | [diff] [blame] | 153 | const char *fmt, va_list args) |
| 154 | { |
Martin Ågren | 150efef | 2017-08-27 09:37:32 +0200 | [diff] [blame] | 155 | static struct strbuf buf = STRBUF_INIT; |
Lars Schneider | 70428d1 | 2016-10-16 16:20:31 -0700 | [diff] [blame] | 156 | |
Martin Ågren | 150efef | 2017-08-27 09:37:32 +0200 | [diff] [blame] | 157 | strbuf_reset(&buf); |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 158 | format_packet(&buf, prefix, fmt, args); |
Jeff King | 4c95e3d | 2017-09-13 13:17:30 -0400 | [diff] [blame] | 159 | if (write_in_full(fd, buf.buf, buf.len) < 0) { |
| 160 | if (!gently) { |
| 161 | check_pipe(errno); |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 162 | die_errno(_("packet write with format failed")); |
Jeff King | 4c95e3d | 2017-09-13 13:17:30 -0400 | [diff] [blame] | 163 | } |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 164 | return error(_("packet write with format failed")); |
Lars Schneider | 70428d1 | 2016-10-16 16:20:31 -0700 | [diff] [blame] | 165 | } |
Jeff King | 4c95e3d | 2017-09-13 13:17:30 -0400 | [diff] [blame] | 166 | |
| 167 | return 0; |
Lars Schneider | 70428d1 | 2016-10-16 16:20:31 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Lars Schneider | 81c634e | 2016-10-16 16:20:29 -0700 | [diff] [blame] | 170 | void packet_write_fmt(int fd, const char *fmt, ...) |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 171 | { |
| 172 | va_list args; |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 173 | |
| 174 | va_start(args, fmt); |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 175 | packet_write_fmt_1(fd, 0, "", fmt, args); |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 176 | va_end(args); |
Lars Schneider | 70428d1 | 2016-10-16 16:20:31 -0700 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | int packet_write_fmt_gently(int fd, const char *fmt, ...) |
| 180 | { |
| 181 | int status; |
| 182 | va_list args; |
| 183 | |
| 184 | va_start(args, fmt); |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 185 | status = packet_write_fmt_1(fd, 1, "", fmt, args); |
Lars Schneider | 70428d1 | 2016-10-16 16:20:31 -0700 | [diff] [blame] | 186 | va_end(args); |
| 187 | return status; |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 188 | } |
| 189 | |
Lars Schneider | edfb780 | 2016-10-16 16:20:33 -0700 | [diff] [blame] | 190 | static int packet_write_gently(const int fd_out, const char *buf, size_t size) |
| 191 | { |
| 192 | static char packet_write_buffer[LARGE_PACKET_MAX]; |
| 193 | size_t packet_size; |
| 194 | |
| 195 | if (size > sizeof(packet_write_buffer) - 4) |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 196 | return error(_("packet write failed - data exceeds max packet size")); |
Lars Schneider | edfb780 | 2016-10-16 16:20:33 -0700 | [diff] [blame] | 197 | |
| 198 | packet_trace(buf, size, 1); |
| 199 | packet_size = size + 4; |
| 200 | set_packet_header(packet_write_buffer, packet_size); |
| 201 | memcpy(packet_write_buffer + 4, buf, size); |
Jeff King | 4c95e3d | 2017-09-13 13:17:30 -0400 | [diff] [blame] | 202 | if (write_in_full(fd_out, packet_write_buffer, packet_size) < 0) |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 203 | return error(_("packet write failed")); |
Jeff King | 4c95e3d | 2017-09-13 13:17:30 -0400 | [diff] [blame] | 204 | return 0; |
Lars Schneider | edfb780 | 2016-10-16 16:20:33 -0700 | [diff] [blame] | 205 | } |
| 206 | |
Brandon Williams | 5d2124b | 2017-10-16 10:55:23 -0700 | [diff] [blame] | 207 | void packet_write(int fd_out, const char *buf, size_t size) |
| 208 | { |
| 209 | if (packet_write_gently(fd_out, buf, size)) |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 210 | die_errno(_("packet write failed")); |
Brandon Williams | 5d2124b | 2017-10-16 10:55:23 -0700 | [diff] [blame] | 211 | } |
| 212 | |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 213 | void packet_buf_write(struct strbuf *buf, const char *fmt, ...) |
| 214 | { |
| 215 | va_list args; |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 216 | |
| 217 | va_start(args, fmt); |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 218 | format_packet(buf, "", fmt, args); |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 219 | va_end(args); |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 220 | } |
| 221 | |
Brandon Williams | f1f4d8a | 2018-03-15 10:31:35 -0700 | [diff] [blame] | 222 | void packet_buf_write_len(struct strbuf *buf, const char *data, size_t len) |
| 223 | { |
| 224 | size_t orig_len, n; |
| 225 | |
| 226 | orig_len = buf->len; |
| 227 | strbuf_addstr(buf, "0000"); |
| 228 | strbuf_add(buf, data, len); |
| 229 | n = buf->len - orig_len; |
| 230 | |
| 231 | if (n > LARGE_PACKET_MAX) |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 232 | die(_("protocol error: impossibly long line")); |
Brandon Williams | f1f4d8a | 2018-03-15 10:31:35 -0700 | [diff] [blame] | 233 | |
| 234 | set_packet_header(&buf->buf[orig_len], n); |
| 235 | packet_trace(data, len, 1); |
| 236 | } |
| 237 | |
Lars Schneider | bb643d8 | 2016-10-16 16:20:34 -0700 | [diff] [blame] | 238 | int write_packetized_from_fd(int fd_in, int fd_out) |
| 239 | { |
| 240 | static char buf[LARGE_PACKET_DATA_MAX]; |
| 241 | int err = 0; |
| 242 | ssize_t bytes_to_write; |
| 243 | |
| 244 | while (!err) { |
| 245 | bytes_to_write = xread(fd_in, buf, sizeof(buf)); |
| 246 | if (bytes_to_write < 0) |
| 247 | return COPY_READ_ERROR; |
| 248 | if (bytes_to_write == 0) |
| 249 | break; |
| 250 | err = packet_write_gently(fd_out, buf, bytes_to_write); |
| 251 | } |
| 252 | if (!err) |
| 253 | err = packet_flush_gently(fd_out); |
| 254 | return err; |
| 255 | } |
| 256 | |
| 257 | int write_packetized_from_buf(const char *src_in, size_t len, int fd_out) |
| 258 | { |
| 259 | int err = 0; |
| 260 | size_t bytes_written = 0; |
| 261 | size_t bytes_to_write; |
| 262 | |
| 263 | while (!err) { |
| 264 | if ((len - bytes_written) > LARGE_PACKET_DATA_MAX) |
| 265 | bytes_to_write = LARGE_PACKET_DATA_MAX; |
| 266 | else |
| 267 | bytes_to_write = len - bytes_written; |
| 268 | if (bytes_to_write == 0) |
| 269 | break; |
| 270 | err = packet_write_gently(fd_out, src_in + bytes_written, bytes_to_write); |
| 271 | bytes_written += bytes_to_write; |
| 272 | } |
| 273 | if (!err) |
| 274 | err = packet_flush_gently(fd_out); |
| 275 | return err; |
| 276 | } |
| 277 | |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 278 | static int get_packet_data(int fd, char **src_buf, size_t *src_size, |
| 279 | void *dst, unsigned size, int options) |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 280 | { |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 281 | ssize_t ret; |
| 282 | |
| 283 | if (fd >= 0 && src_buf && *src_buf) |
Johannes Schindelin | 033abf9 | 2018-05-02 11:38:39 +0200 | [diff] [blame] | 284 | BUG("multiple sources given to packet_read"); |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 285 | |
| 286 | /* Read up to "size" bytes from our source, whatever it is. */ |
| 287 | if (src_buf && *src_buf) { |
| 288 | ret = size < *src_size ? size : *src_size; |
| 289 | memcpy(dst, *src_buf, ret); |
| 290 | *src_buf += ret; |
| 291 | *src_size -= ret; |
| 292 | } else { |
| 293 | ret = read_in_full(fd, dst, size); |
| 294 | if (ret < 0) |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 295 | die_errno(_("read error")); |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | /* And complain if we didn't get enough bytes to satisfy the read. */ |
Jeff King | 61d3633 | 2017-09-27 02:00:28 -0400 | [diff] [blame] | 299 | if (ret != size) { |
Jeff King | 0380942 | 2013-02-20 15:02:10 -0500 | [diff] [blame] | 300 | if (options & PACKET_READ_GENTLE_ON_EOF) |
Heiko Voigt | 46284dd | 2012-06-19 20:24:50 +0200 | [diff] [blame] | 301 | return -1; |
| 302 | |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 303 | die(_("the remote end hung up unexpectedly")); |
Heiko Voigt | 46284dd | 2012-06-19 20:24:50 +0200 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | return ret; |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 307 | } |
| 308 | |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 309 | static int packet_length(const char *linelen) |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 310 | { |
René Scharfe | d233097 | 2016-09-03 17:59:20 +0200 | [diff] [blame] | 311 | int val = hex2chr(linelen); |
| 312 | return (val < 0) ? val : (val << 8) | hex2chr(linelen + 2); |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 313 | } |
| 314 | |
Brandon Williams | 2153d47 | 2018-03-14 11:31:38 -0700 | [diff] [blame] | 315 | enum packet_read_status packet_read_with_status(int fd, char **src_buffer, |
| 316 | size_t *src_len, char *buffer, |
| 317 | unsigned size, int *pktlen, |
| 318 | int options) |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 319 | { |
Brandon Williams | 2153d47 | 2018-03-14 11:31:38 -0700 | [diff] [blame] | 320 | int len; |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 321 | char linelen[4]; |
| 322 | |
Brandon Williams | 2153d47 | 2018-03-14 11:31:38 -0700 | [diff] [blame] | 323 | if (get_packet_data(fd, src_buffer, src_len, linelen, 4, options) < 0) { |
| 324 | *pktlen = -1; |
| 325 | return PACKET_READ_EOF; |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 326 | } |
Brandon Williams | 2153d47 | 2018-03-14 11:31:38 -0700 | [diff] [blame] | 327 | |
| 328 | len = packet_length(linelen); |
| 329 | |
| 330 | if (len < 0) { |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 331 | die(_("protocol error: bad line length character: %.4s"), linelen); |
Brandon Williams | 2153d47 | 2018-03-14 11:31:38 -0700 | [diff] [blame] | 332 | } else if (!len) { |
| 333 | packet_trace("0000", 4, 0); |
| 334 | *pktlen = 0; |
| 335 | return PACKET_READ_FLUSH; |
Brandon Williams | a4cfd41 | 2018-03-14 11:31:40 -0700 | [diff] [blame] | 336 | } else if (len == 1) { |
| 337 | packet_trace("0001", 4, 0); |
| 338 | *pktlen = 0; |
| 339 | return PACKET_READ_DELIM; |
Brandon Williams | 2153d47 | 2018-03-14 11:31:38 -0700 | [diff] [blame] | 340 | } else if (len < 4) { |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 341 | die(_("protocol error: bad line length %d"), len); |
Brandon Williams | 2153d47 | 2018-03-14 11:31:38 -0700 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | len -= 4; |
| 345 | if ((unsigned)len >= size) |
Nguyễn Thái Ngọc Duy | c60d769 | 2018-07-21 09:49:34 +0200 | [diff] [blame] | 346 | die(_("protocol error: bad line length %d"), len); |
Brandon Williams | 2153d47 | 2018-03-14 11:31:38 -0700 | [diff] [blame] | 347 | |
| 348 | if (get_packet_data(fd, src_buffer, src_len, buffer, len, options) < 0) { |
| 349 | *pktlen = -1; |
| 350 | return PACKET_READ_EOF; |
| 351 | } |
Jeff King | 819b929 | 2013-02-20 15:02:28 -0500 | [diff] [blame] | 352 | |
| 353 | if ((options & PACKET_READ_CHOMP_NEWLINE) && |
| 354 | len && buffer[len-1] == '\n') |
| 355 | len--; |
| 356 | |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 357 | buffer[len] = 0; |
Jeff King | bbc30f9 | 2011-02-24 09:30:19 -0500 | [diff] [blame] | 358 | packet_trace(buffer, len, 0); |
Jeff King | 533ddba | 2019-04-13 01:54:02 -0400 | [diff] [blame] | 359 | |
| 360 | if ((options & PACKET_READ_DIE_ON_ERR_PACKET) && |
| 361 | starts_with(buffer, "ERR ")) |
| 362 | die(_("remote error: %s"), buffer + 4); |
| 363 | |
Brandon Williams | 2153d47 | 2018-03-14 11:31:38 -0700 | [diff] [blame] | 364 | *pktlen = len; |
| 365 | return PACKET_READ_NORMAL; |
| 366 | } |
| 367 | |
| 368 | int packet_read(int fd, char **src_buffer, size_t *src_len, |
| 369 | char *buffer, unsigned size, int options) |
| 370 | { |
| 371 | int pktlen = -1; |
| 372 | |
| 373 | packet_read_with_status(fd, src_buffer, src_len, buffer, size, |
| 374 | &pktlen, options); |
| 375 | |
| 376 | return pktlen; |
Linus Torvalds | f3a3214 | 2005-06-29 20:50:15 -0700 | [diff] [blame] | 377 | } |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 378 | |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 379 | static char *packet_read_line_generic(int fd, |
| 380 | char **src, size_t *src_len, |
| 381 | int *dst_len) |
Heiko Voigt | 46284dd | 2012-06-19 20:24:50 +0200 | [diff] [blame] | 382 | { |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 383 | int len = packet_read(fd, src, src_len, |
| 384 | packet_buffer, sizeof(packet_buffer), |
Jeff King | 74543a0 | 2013-02-20 15:02:57 -0500 | [diff] [blame] | 385 | PACKET_READ_CHOMP_NEWLINE); |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 386 | if (dst_len) |
| 387 | *dst_len = len; |
Ben Peart | 974b50c | 2017-05-05 11:27:54 -0400 | [diff] [blame] | 388 | return (len > 0) ? packet_buffer : NULL; |
Heiko Voigt | 46284dd | 2012-06-19 20:24:50 +0200 | [diff] [blame] | 389 | } |
| 390 | |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 391 | char *packet_read_line(int fd, int *len_p) |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 392 | { |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 393 | return packet_read_line_generic(fd, NULL, NULL, len_p); |
| 394 | } |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 395 | |
Ben Peart | 825b922 | 2017-05-05 11:27:55 -0400 | [diff] [blame] | 396 | int packet_read_line_gently(int fd, int *dst_len, char **dst_line) |
| 397 | { |
| 398 | int len = packet_read(fd, NULL, NULL, |
| 399 | packet_buffer, sizeof(packet_buffer), |
| 400 | PACKET_READ_CHOMP_NEWLINE|PACKET_READ_GENTLE_ON_EOF); |
| 401 | if (dst_len) |
| 402 | *dst_len = len; |
| 403 | if (dst_line) |
| 404 | *dst_line = (len > 0) ? packet_buffer : NULL; |
| 405 | return len; |
| 406 | } |
| 407 | |
Jeff King | 4981fe7 | 2013-02-23 17:31:34 -0500 | [diff] [blame] | 408 | char *packet_read_line_buf(char **src, size_t *src_len, int *dst_len) |
| 409 | { |
| 410 | return packet_read_line_generic(-1, src, src_len, dst_len); |
Shawn O. Pearce | f5615d2 | 2009-10-30 17:47:21 -0700 | [diff] [blame] | 411 | } |
Lars Schneider | bb643d8 | 2016-10-16 16:20:34 -0700 | [diff] [blame] | 412 | |
| 413 | ssize_t read_packetized_to_strbuf(int fd_in, struct strbuf *sb_out) |
| 414 | { |
| 415 | int packet_len; |
| 416 | |
| 417 | size_t orig_len = sb_out->len; |
| 418 | size_t orig_alloc = sb_out->alloc; |
| 419 | |
| 420 | for (;;) { |
| 421 | strbuf_grow(sb_out, LARGE_PACKET_DATA_MAX); |
| 422 | packet_len = packet_read(fd_in, NULL, NULL, |
| 423 | /* strbuf_grow() above always allocates one extra byte to |
| 424 | * store a '\0' at the end of the string. packet_read() |
| 425 | * writes a '\0' extra byte at the end, too. Let it know |
| 426 | * that there is already room for the extra byte. |
| 427 | */ |
| 428 | sb_out->buf + sb_out->len, LARGE_PACKET_DATA_MAX+1, |
| 429 | PACKET_READ_GENTLE_ON_EOF); |
| 430 | if (packet_len <= 0) |
| 431 | break; |
| 432 | sb_out->len += packet_len; |
| 433 | } |
| 434 | |
| 435 | if (packet_len < 0) { |
| 436 | if (orig_alloc == 0) |
| 437 | strbuf_release(sb_out); |
| 438 | else |
| 439 | strbuf_setlen(sb_out, orig_len); |
| 440 | return packet_len; |
| 441 | } |
| 442 | return sb_out->len - orig_len; |
| 443 | } |
Brandon Williams | 77dabc1 | 2018-03-14 11:31:39 -0700 | [diff] [blame] | 444 | |
Jonathan Tan | fbd76cd | 2019-01-16 11:28:13 -0800 | [diff] [blame] | 445 | int recv_sideband(const char *me, int in_stream, int out) |
| 446 | { |
| 447 | char buf[LARGE_PACKET_MAX + 1]; |
| 448 | int len; |
| 449 | struct strbuf scratch = STRBUF_INIT; |
| 450 | enum sideband_type sideband_type; |
| 451 | |
| 452 | while (1) { |
| 453 | len = packet_read(in_stream, NULL, NULL, buf, LARGE_PACKET_MAX, |
| 454 | 0); |
Jonathan Tan | 0bbc0bc | 2019-01-16 11:28:14 -0800 | [diff] [blame] | 455 | if (!demultiplex_sideband(me, buf, len, 0, &scratch, |
Jonathan Tan | fbd76cd | 2019-01-16 11:28:13 -0800 | [diff] [blame] | 456 | &sideband_type)) |
| 457 | continue; |
| 458 | switch (sideband_type) { |
| 459 | case SIDEBAND_PRIMARY: |
| 460 | write_or_die(out, buf + 1, len - 1); |
| 461 | break; |
| 462 | default: /* errors: message already written */ |
| 463 | return sideband_type; |
| 464 | } |
| 465 | } |
| 466 | } |
| 467 | |
Brandon Williams | 77dabc1 | 2018-03-14 11:31:39 -0700 | [diff] [blame] | 468 | /* Packet Reader Functions */ |
| 469 | void packet_reader_init(struct packet_reader *reader, int fd, |
| 470 | char *src_buffer, size_t src_len, |
| 471 | int options) |
| 472 | { |
| 473 | memset(reader, 0, sizeof(*reader)); |
| 474 | |
| 475 | reader->fd = fd; |
| 476 | reader->src_buffer = src_buffer; |
| 477 | reader->src_len = src_len; |
| 478 | reader->buffer = packet_buffer; |
| 479 | reader->buffer_size = sizeof(packet_buffer); |
| 480 | reader->options = options; |
Jonathan Tan | 0bbc0bc | 2019-01-16 11:28:14 -0800 | [diff] [blame] | 481 | reader->me = "git"; |
Brandon Williams | 77dabc1 | 2018-03-14 11:31:39 -0700 | [diff] [blame] | 482 | } |
| 483 | |
| 484 | enum packet_read_status packet_reader_read(struct packet_reader *reader) |
| 485 | { |
Jonathan Tan | 0bbc0bc | 2019-01-16 11:28:14 -0800 | [diff] [blame] | 486 | struct strbuf scratch = STRBUF_INIT; |
| 487 | |
Brandon Williams | 77dabc1 | 2018-03-14 11:31:39 -0700 | [diff] [blame] | 488 | if (reader->line_peeked) { |
| 489 | reader->line_peeked = 0; |
| 490 | return reader->status; |
| 491 | } |
| 492 | |
Jonathan Tan | 0bbc0bc | 2019-01-16 11:28:14 -0800 | [diff] [blame] | 493 | /* |
| 494 | * Consume all progress packets until a primary payload packet is |
| 495 | * received |
| 496 | */ |
| 497 | while (1) { |
| 498 | enum sideband_type sideband_type; |
| 499 | reader->status = packet_read_with_status(reader->fd, |
| 500 | &reader->src_buffer, |
| 501 | &reader->src_len, |
| 502 | reader->buffer, |
| 503 | reader->buffer_size, |
| 504 | &reader->pktlen, |
| 505 | reader->options); |
| 506 | if (!reader->use_sideband) |
| 507 | break; |
| 508 | if (demultiplex_sideband(reader->me, reader->buffer, |
| 509 | reader->pktlen, 1, &scratch, |
| 510 | &sideband_type)) |
| 511 | break; |
| 512 | } |
Brandon Williams | 77dabc1 | 2018-03-14 11:31:39 -0700 | [diff] [blame] | 513 | |
| 514 | if (reader->status == PACKET_READ_NORMAL) |
Jonathan Tan | 0bbc0bc | 2019-01-16 11:28:14 -0800 | [diff] [blame] | 515 | /* Skip the sideband designator if sideband is used */ |
| 516 | reader->line = reader->use_sideband ? |
| 517 | reader->buffer + 1 : reader->buffer; |
Brandon Williams | 77dabc1 | 2018-03-14 11:31:39 -0700 | [diff] [blame] | 518 | else |
| 519 | reader->line = NULL; |
| 520 | |
| 521 | return reader->status; |
| 522 | } |
| 523 | |
| 524 | enum packet_read_status packet_reader_peek(struct packet_reader *reader) |
| 525 | { |
| 526 | /* Only allow peeking a single line */ |
| 527 | if (reader->line_peeked) |
| 528 | return reader->status; |
| 529 | |
| 530 | /* Peek a line by reading it and setting peeked flag */ |
| 531 | packet_reader_read(reader); |
| 532 | reader->line_peeked = 1; |
| 533 | return reader->status; |
| 534 | } |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 535 | |
| 536 | void packet_writer_init(struct packet_writer *writer, int dest_fd) |
| 537 | { |
| 538 | writer->dest_fd = dest_fd; |
Jonathan Tan | 0bbc0bc | 2019-01-16 11:28:14 -0800 | [diff] [blame] | 539 | writer->use_sideband = 0; |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 540 | } |
| 541 | |
| 542 | void packet_writer_write(struct packet_writer *writer, const char *fmt, ...) |
| 543 | { |
| 544 | va_list args; |
| 545 | |
| 546 | va_start(args, fmt); |
Jonathan Tan | 0bbc0bc | 2019-01-16 11:28:14 -0800 | [diff] [blame] | 547 | packet_write_fmt_1(writer->dest_fd, 0, |
| 548 | writer->use_sideband ? "\001" : "", fmt, args); |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 549 | va_end(args); |
| 550 | } |
| 551 | |
| 552 | void packet_writer_error(struct packet_writer *writer, const char *fmt, ...) |
| 553 | { |
| 554 | va_list args; |
| 555 | |
| 556 | va_start(args, fmt); |
Jonathan Tan | 0bbc0bc | 2019-01-16 11:28:14 -0800 | [diff] [blame] | 557 | packet_write_fmt_1(writer->dest_fd, 0, |
| 558 | writer->use_sideband ? "\003" : "ERR ", fmt, args); |
Jonathan Tan | bc2e795 | 2019-01-15 11:40:27 -0800 | [diff] [blame] | 559 | va_end(args); |
| 560 | } |
| 561 | |
| 562 | void packet_writer_delim(struct packet_writer *writer) |
| 563 | { |
| 564 | packet_delim(writer->dest_fd); |
| 565 | } |
| 566 | |
| 567 | void packet_writer_flush(struct packet_writer *writer) |
| 568 | { |
| 569 | packet_flush(writer->dest_fd); |
| 570 | } |