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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-03-09 13:19:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-03-09 13:20:02 +0000 |
commit | 58daab21cd043e1dc37024a7f99b396788372918 (patch) | |
tree | 96771e43bb69f7c1c2b0b4f7374cb74d7866d0cb /web/server/h2o/libh2o/deps/libyrmcds/send_text.c | |
parent | Releasing debian version 1.43.2-1. (diff) | |
download | netdata-58daab21cd043e1dc37024a7f99b396788372918.tar.xz netdata-58daab21cd043e1dc37024a7f99b396788372918.zip |
Merging upstream version 1.44.3.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'web/server/h2o/libh2o/deps/libyrmcds/send_text.c')
-rw-r--r-- | web/server/h2o/libh2o/deps/libyrmcds/send_text.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/deps/libyrmcds/send_text.c b/web/server/h2o/libh2o/deps/libyrmcds/send_text.c new file mode 100644 index 000000000..b84fdce0d --- /dev/null +++ b/web/server/h2o/libh2o/deps/libyrmcds/send_text.c @@ -0,0 +1,414 @@ +// (C) 2016 Cybozu + +#include "yrmcds_text.h" +#include "yrmcds_portability.h" + +#ifdef LIBYRMCDS_USE_LZ4 +# include "lz4/lib/lz4.h" +#endif + +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <sys/socket.h> +#include <sys/types.h> +#include <sys/uio.h> +#include <unistd.h> + +#define MAX_KEY_LENGTH 250 // from memcached spec. +#define TEXTBUF_SIZE 1000 // enough for any command & parameters. +#define EXPAND_STR(s) (s), (sizeof(s) - 1) +static const char CRLF[2] = {'\r', '\n'}; + +#ifdef LIBYRMCDS_USE_LZ4 +static inline void +hton32(uint32_t i, char* p) { + uint32_t n = htobe32(i); + memcpy(p, &n, sizeof(n)); +} +#endif + +static inline yrmcds_error +check_key(const char* key, size_t key_len) { + if( key_len > MAX_KEY_LENGTH ) + return YRMCDS_BAD_KEY; + + size_t i; + for( i = 0; i < key_len; i++ ) { + char c = key[i]; + if( c <= ' ' ) return YRMCDS_BAD_KEY; // SPC and control chars + if( c == 127 ) return YRMCDS_BAD_KEY; // DEL + } + + return YRMCDS_OK; +} + +typedef struct { + char* pos; + char buffer[TEXTBUF_SIZE]; +} textbuf_t; + +static inline size_t +textbuf_length(const textbuf_t* buf) { + return (size_t)(buf->pos - buf->buffer); +} + +static inline void +textbuf_init(textbuf_t* buf) { + buf->pos = buf->buffer; +} + +static inline void +textbuf_append_char(textbuf_t* buf, char c) { + *buf->pos = c; + ++buf->pos; +} + +static inline void +textbuf_append_string(textbuf_t* buf, const char* s, size_t len) { + memcpy(buf->pos, s, len); + buf->pos += len; +} + +#define textbuf_append_const_string(b, s) \ + textbuf_append_string(b, s, sizeof(s) - 1) + +static void +textbuf_append_uint64(textbuf_t* buf, uint64_t n) { + // UINT64_MAX = 18446744073709551615 -> char[20] + char nbuf[20]; + char* pos = (nbuf) + 20; + + do { + pos--; + uint64_t m = n % 10; + n /= 10; + *pos = (char)('0' + m); + } while( n != 0 ); + + textbuf_append_string(buf, pos, (size_t)(nbuf - pos + 20)); +} + + +static yrmcds_error +send_command(yrmcds* c, textbuf_t* buf, uint32_t* serial) { + memcpy(buf->pos, CRLF, sizeof(CRLF)); + buf->pos += sizeof(CRLF); + const char* p = buf->buffer; + size_t len = textbuf_length(buf); + +#ifndef LIBYRMCDS_NO_INTERNAL_LOCK + int e = pthread_mutex_lock(&c->lock); + if( e != 0 ) { + errno = e; + return YRMCDS_SYSTEM_ERROR; + } +#endif // ! LIBYRMCDS_NO_INTERNAL_LOCK + + c->serial = c->serial + 1; + if( serial != NULL ) + *serial = c->serial; + + yrmcds_error ret = YRMCDS_OK; + while( len > 0 ) { + ssize_t n = send(c->sock, p, len, 0); + if( n == -1 ) { + if( errno == EINTR ) continue; + ret = YRMCDS_SYSTEM_ERROR; + goto OUT; + } + size_t n2 = (size_t)n; + p += n2; + len -= n2; + } + + OUT: +#ifndef LIBYRMCDS_NO_INTERNAL_LOCK + pthread_mutex_unlock(&c->lock); +#endif + return ret; +} + +static yrmcds_error +send_data(yrmcds* c, const char* cmd, size_t cmd_len, + const char* key, size_t key_len, + const char* data, size_t data_len, + uint32_t flags, uint32_t expire, uint64_t cas, + int quiet, uint32_t* serial) { + if( key == NULL || key_len == 0 || data == NULL || data_len == 0 || quiet ) + return YRMCDS_BAD_ARGUMENT; + + yrmcds_error ret; + ret = check_key(key, key_len); + if( ret != YRMCDS_OK ) return ret; + + if( cas != 0 ) { + cmd = "cas"; + cmd_len = 3; + } + + int compressed = 0; +#ifdef LIBYRMCDS_USE_LZ4 + if( (c->compress_size > 0) && (data_len > c->compress_size) ) { + if( flags & YRMCDS_FLAG_COMPRESS ) + return YRMCDS_BAD_ARGUMENT; + + size_t bound = (size_t)LZ4_compressBound((int)data_len); + char* new_data = (char*)malloc(bound + sizeof(uint32_t)); + if( new_data == NULL ) + return YRMCDS_OUT_OF_MEMORY; + uint32_t new_size = + (uint32_t)LZ4_compress(data, new_data + sizeof(uint32_t), + (int)data_len); + if( new_size == 0 ) { + free(new_data); + return YRMCDS_COMPRESS_FAILED; + } + hton32((uint32_t)data_len, new_data); + flags |= YRMCDS_FLAG_COMPRESS; + data_len = sizeof(uint32_t) + new_size; + data = new_data; + compressed = 1; + } +#endif // LIBYRMCDS_USE_LZ4 + + textbuf_t buf[1]; + textbuf_init(buf); + + // "cmd key flags expire bytes (cas)" + textbuf_append_string(buf, cmd, cmd_len); + textbuf_append_char(buf, ' '); + textbuf_append_string(buf, key, key_len); + textbuf_append_char(buf, ' '); + textbuf_append_uint64(buf, flags); + textbuf_append_char(buf, ' '); + textbuf_append_uint64(buf, expire); + textbuf_append_char(buf, ' '); + textbuf_append_uint64(buf, (uint64_t)data_len); + if( cas != 0 ) { + textbuf_append_char(buf, ' '); + textbuf_append_uint64(buf, cas); + } + textbuf_append_string(buf, CRLF, sizeof(CRLF)); + + struct iovec iov[3]; + int iovcnt = 3; + iov[0].iov_base = buf[0].buffer; + iov[0].iov_len = textbuf_length(buf); + iov[1].iov_base = (void*)data; + iov[1].iov_len = data_len; + iov[2].iov_base = (void*)CRLF; + iov[2].iov_len = sizeof(CRLF); + +#ifndef LIBYRMCDS_NO_INTERNAL_LOCK + int e = pthread_mutex_lock(&c->lock); + if( e != 0 ) { + errno = e; + return YRMCDS_SYSTEM_ERROR; + } +#endif // ! LIBYRMCDS_NO_INTERNAL_LOCK + + c->serial = c->serial + 1; + if( serial != NULL ) + *serial = c->serial; + + while( iovcnt > 0 ) { + ssize_t n = writev(c->sock, iov, iovcnt); + if( n == -1 ) { + if( errno == EINTR ) continue; + ret = YRMCDS_SYSTEM_ERROR; + goto OUT; + } + size_t n2 = (size_t)n; + while( n2 > 0 ) { + if( n2 < iov[0].iov_len ) { + iov[0].iov_base = (char*)iov[0].iov_base + n2; + iov[0].iov_len -= n2; + break; + } + n2 -= iov[0].iov_len; + iovcnt --; + if( iovcnt == 0 ) + break; + + int i; + for( i = 0; i < iovcnt; ++i ) + iov[i] = iov[i+1]; + } + } + + OUT: +#ifndef LIBYRMCDS_NO_INTERNAL_LOCK + pthread_mutex_unlock(&c->lock); +#endif + if( compressed ) + free((void*)data); + return ret; +} + + +// public functions. +yrmcds_error yrmcds_text_get(yrmcds* c, const char* key, size_t key_len, + int quiet, uint32_t* serial) { + if( key == NULL || key_len == 0 || quiet ) + return YRMCDS_BAD_ARGUMENT; + + yrmcds_error ret; + ret = check_key(key, key_len); + if( ret != YRMCDS_OK ) return ret; + + textbuf_t buf[1]; + textbuf_init(buf); + + textbuf_append_const_string(buf, "gets "); + textbuf_append_string(buf, key, key_len); + + return send_command(c, buf, serial); +} + +yrmcds_error yrmcds_text_touch(yrmcds* c, const char* key, size_t key_len, + uint32_t expire, int quiet, uint32_t* serial) { + if( key == NULL || key_len == 0 || quiet ) + return YRMCDS_BAD_ARGUMENT; + + yrmcds_error ret; + ret = check_key(key, key_len); + if( ret != YRMCDS_OK ) return ret; + + textbuf_t buf[1]; + textbuf_init(buf); + + textbuf_append_const_string(buf, "touch "); + textbuf_append_string(buf, key, key_len); + textbuf_append_char(buf, ' '); + textbuf_append_uint64(buf, expire); + + return send_command(c, buf, serial); +} + +yrmcds_error yrmcds_text_set(yrmcds* c, const char* key, size_t key_len, + const char* data, size_t data_len, + uint32_t flags, uint32_t expire, uint64_t cas, + int quiet, uint32_t* serial) { + return send_data(c, EXPAND_STR("set"), key, key_len, data, data_len, + flags, expire, cas, quiet, serial); +} + +yrmcds_error yrmcds_text_replace(yrmcds* c, const char* key, size_t key_len, + const char* data, size_t data_len, + uint32_t flags, uint32_t expire, uint64_t cas, + int quiet, uint32_t* serial) { + return send_data(c, EXPAND_STR("replace"), key, key_len, data, data_len, + flags, expire, cas, quiet, serial); +} + +yrmcds_error yrmcds_text_add(yrmcds* c, const char* key, size_t key_len, + const char* data, size_t data_len, + uint32_t flags, uint32_t expire, uint64_t cas, + int quiet, uint32_t* serial) { + return send_data(c, EXPAND_STR("add"), key, key_len, data, data_len, + flags, expire, cas, quiet, serial); +} + +yrmcds_error yrmcds_text_append(yrmcds* c, const char* key, size_t key_len, + const char* data, size_t data_len, + int quiet, uint32_t* serial) { + return send_data(c, EXPAND_STR("append"), key, key_len, data, data_len, + 0, 0, 0, quiet, serial); +} + +yrmcds_error yrmcds_text_prepend(yrmcds* c, const char* key, size_t key_len, + const char* data, size_t data_len, + int quiet, uint32_t* serial) { + return send_data(c, EXPAND_STR("prepend"), key, key_len, data, data_len, + 0, 0, 0, quiet, serial); +} + +yrmcds_error yrmcds_text_incr(yrmcds* c, const char* key, size_t key_len, + uint64_t value, int quiet, uint32_t* serial) { + if( key == NULL || key_len == 0 || quiet ) + return YRMCDS_BAD_ARGUMENT; + + yrmcds_error ret; + ret = check_key(key, key_len); + if( ret != YRMCDS_OK ) return ret; + + textbuf_t buf[1]; + textbuf_init(buf); + + textbuf_append_const_string(buf, "incr "); + textbuf_append_string(buf, key, key_len); + textbuf_append_char(buf, ' '); + textbuf_append_uint64(buf, value); + + return send_command(c, buf, serial); +} + +yrmcds_error yrmcds_text_decr(yrmcds* c, const char* key, size_t key_len, + uint64_t value, int quiet, uint32_t* serial) { + if( key == NULL || key_len == 0 || quiet ) + return YRMCDS_BAD_ARGUMENT; + + yrmcds_error ret; + ret = check_key(key, key_len); + if( ret != YRMCDS_OK ) return ret; + + textbuf_t buf[1]; + textbuf_init(buf); + + textbuf_append_const_string(buf, "decr "); + textbuf_append_string(buf, key, key_len); + textbuf_append_char(buf, ' '); + textbuf_append_uint64(buf, value); + + return send_command(c, buf, serial); +} + +yrmcds_error yrmcds_text_remove(yrmcds* c, const char* key, size_t key_len, + int quiet, uint32_t* serial) { + if( key == NULL || key_len == 0 || quiet ) + return YRMCDS_BAD_ARGUMENT; + + yrmcds_error ret; + ret = check_key(key, key_len); + if( ret != YRMCDS_OK ) return ret; + + textbuf_t buf[1]; + textbuf_init(buf); + + textbuf_append_const_string(buf, "delete "); + textbuf_append_string(buf, key, key_len); + + return send_command(c, buf, serial); +} + +yrmcds_error yrmcds_text_flush(yrmcds* c, uint32_t delay, + int quiet, uint32_t* serial) { + if( quiet ) + return YRMCDS_BAD_ARGUMENT; + + textbuf_t buf[1]; + textbuf_init(buf); + + textbuf_append_const_string(buf, "flush_all"); + if( delay != 0 ) { + textbuf_append_char(buf, ' '); + textbuf_append_uint64(buf, delay); + } + + return send_command(c, buf, serial); +} + +yrmcds_error yrmcds_text_version(yrmcds* c, uint32_t* serial) { + textbuf_t buf[1]; + textbuf_init(buf); + textbuf_append_const_string(buf, "version"); + return send_command(c, buf, serial); +} + +yrmcds_error yrmcds_text_quit(yrmcds* c, uint32_t* serial) { + textbuf_t buf[1]; + textbuf_init(buf); + textbuf_append_const_string(buf, "quit"); + return send_command(c, buf, serial); +} |