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cdb2api.c
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cdb2api.c
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/*
Copyright 2015, 2023, Bloomberg Finance L.P.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include <inttypes.h>
#include <alloca.h>
#include <stdarg.h>
#include <sbuf2.h>
#include <limits.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <sys/time.h>
#include <sys/poll.h>
#include <sys/socket.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <pthread.h>
#include <arpa/inet.h>
#include <netinet/tcp.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <inttypes.h>
#include "cdb2api.h"
#include "sqlquery.pb-c.h"
#include "sqlresponse.pb-c.h"
#include <fcntl.h>
/*
*******************************************************************************
** WARNING: If you add any internal configuration state to this file, please
** update the reset_the_configuration() function as well to include
** it.
*******************************************************************************
*/
#define SOCKPOOL_SOCKET_NAME "/tmp/sockpool.socket"
static char *SOCKPOOL_OTHER_NAME = NULL;
#define COMDB2DB "comdb2db"
#define COMDB2DB_NUM 32432
#define MAX_BUFSIZE_ONSTACK 8192
#define CDB2HOSTNAME_LEN 128
#define CDB2DBCONFIG_NOBBENV_DEFAULT "/opt/bb/etc/cdb2/config/comdb2db.cfg"
static char CDB2DBCONFIG_NOBBENV[512] = CDB2DBCONFIG_NOBBENV_DEFAULT;
/* The real path is COMDB2_ROOT + CDB2DBCONFIG_NOBBENV_PATH */
#define CDB2DBCONFIG_NOBBENV_PATH_DEFAULT "/etc/cdb2/config.d/"
static char CDB2DBCONFIG_NOBBENV_PATH[] = CDB2DBCONFIG_NOBBENV_PATH_DEFAULT; /* READ-ONLY */
#define CDB2DBCONFIG_TEMP_BB_BIN_DEFAULT "/bb/bin/comdb2db.cfg"
static char CDB2DBCONFIG_TEMP_BB_BIN[512] = "/bb/bin/comdb2db.cfg";
static char *CDB2DBCONFIG_BUF = NULL;
static char cdb2_default_cluster[64] = "";
static char cdb2_comdb2dbname[32] = "";
#define QUOTE_(x) #x
#define QUOTE(x) QUOTE_(x)
#ifndef CDB2_DNS_SUFFIX
#define CDB2_DNS_SUFFIX
#endif
static char cdb2_dnssuffix[255] = QUOTE(CDB2_DNS_SUFFIX);
static char cdb2_machine_room[16] = "";
#define CDB2_PORTMUXPORT_DEFAULT 5105
static int CDB2_PORTMUXPORT = CDB2_PORTMUXPORT_DEFAULT;
#define MAX_RETRIES_DEFAULT 21
static int MAX_RETRIES = MAX_RETRIES_DEFAULT; /* We are looping each node twice. */
#define MIN_RETRIES_DEFAULT 3
static int MIN_RETRIES = MIN_RETRIES_DEFAULT;
#define CDB2_CONNECT_TIMEOUT_DEFAULT 100
static int CDB2_CONNECT_TIMEOUT = CDB2_CONNECT_TIMEOUT_DEFAULT;
#define CDB2_AUTO_CONSUME_TIMEOUT_MS_DEFAULT 0
static int CDB2_AUTO_CONSUME_TIMEOUT_MS = CDB2_AUTO_CONSUME_TIMEOUT_MS_DEFAULT;
#define COMDB2DB_TIMEOUT_DEFAULT 2000
static int COMDB2DB_TIMEOUT = COMDB2DB_TIMEOUT_DEFAULT;
#define CDB2_API_CALL_TIMEOUT_DEFAULT 120000 /* defaults to 2 minute */
static int CDB2_API_CALL_TIMEOUT = CDB2_API_CALL_TIMEOUT_DEFAULT;
#define CDB2_SOCKET_TIMEOUT_DEFAULT 5000
static int CDB2_SOCKET_TIMEOUT = CDB2_SOCKET_TIMEOUT_DEFAULT;
#define CDB2_POLL_TIMEOUT_DEFAULT 250
static int CDB2_POLL_TIMEOUT = CDB2_POLL_TIMEOUT_DEFAULT;
#define CDB2_PROTOBUF_SIZE_DEFAULT 4096
static int CDB2_PROTOBUF_SIZE = CDB2_PROTOBUF_SIZE_DEFAULT;
#define CDB2_TCPBUFSZ_DEFAULT 0
static int cdb2_tcpbufsz = CDB2_TCPBUFSZ_DEFAULT;
#define CDB2CFG_OVERRIDE_DEFAULT 0
static int cdb2cfg_override = CDB2CFG_OVERRIDE_DEFAULT;
#define CDB2_REQUEST_FP_DEFAULT 0
static int CDB2_REQUEST_FP = CDB2_REQUEST_FP_DEFAULT;
#define CDB2_GET_HOSTNAME_FROM_SOCKPOOL_FD_DEFAULT 1
static int CDB2_GET_HOSTNAME_FROM_SOCKPOOL_FD = CDB2_GET_HOSTNAME_FROM_SOCKPOOL_FD_DEFAULT;
#include <openssl/conf.h>
#include <openssl/crypto.h>
static ssl_mode cdb2_c_ssl_mode = SSL_ALLOW;
static char cdb2_sslcertpath[PATH_MAX];
static char cdb2_sslcert[PATH_MAX];
static char cdb2_sslkey[PATH_MAX];
static char cdb2_sslca[PATH_MAX];
#if HAVE_CRL
static char cdb2_sslcrl[PATH_MAX];
#endif
#ifdef NID_host /* available as of RFC 4524 */
#define CDB2_NID_DBNAME_DEFAULT NID_host
#else
#define CDB2_NID_DBNAME_DEFAULT NID_commonName
#endif
int cdb2_nid_dbname = CDB2_NID_DBNAME_DEFAULT;
#define CDB2_CACHE_SSL_SESS_DEFAULT 0
static int cdb2_cache_ssl_sess = CDB2_CACHE_SSL_SESS_DEFAULT;
#define CDB2_MIN_TLS_VER_DEFAULT 0
static double cdb2_min_tls_ver = CDB2_MIN_TLS_VER_DEFAULT;
static pthread_mutex_t cdb2_ssl_sess_lock = PTHREAD_MUTEX_INITIALIZER;
typedef struct cdb2_ssl_sess cdb2_ssl_sess;
static cdb2_ssl_sess *cdb2_get_ssl_sessions(cdb2_hndl_tp *hndl);
static int cdb2_set_ssl_sessions(cdb2_hndl_tp *hndl,
cdb2_ssl_sess *sessions);
static int cdb2_add_ssl_session(cdb2_hndl_tp *hndl);
static pthread_mutex_t cdb2_cfg_lock = PTHREAD_MUTEX_INITIALIZER;
#define CDB2_ALLOW_PMUX_ROUTE_DEFAULT 0
static int cdb2_allow_pmux_route = CDB2_ALLOW_PMUX_ROUTE_DEFAULT;
static int _PID; /* ONE-TIME */
static int _MACHINE_ID; /* ONE-TIME */
static char *_ARGV0; /* ONE-TIME */
static int iam_identity = 0;
#define DB_TZNAME_DEFAULT "America/New_York"
#define MAX_NODES 128
#define MAX_CONTEXTS 10 /* Maximum stack size for storing context messages */
#define MAX_CONTEXT_LEN 100 /* Maximum allowed length of a context message */
#define MAX_STACK 512 /* Size of call-stack which opened the handle */
pthread_mutex_t cdb2_sockpool_mutex = PTHREAD_MUTEX_INITIALIZER;
#define MAX_SOCKPOOL_FDS 8
#include <netdb.h>
static pthread_once_t init_once = PTHREAD_ONCE_INIT;
static int log_calls = 0; /* ONE-TIME */
static void reset_sockpool(void);
struct cdb2_event {
cdb2_event_type types;
cdb2_event_ctrl ctrls;
cdb2_event_callback cb;
int global;
void *user_arg;
cdb2_event *next;
int argc;
cdb2_event_arg argv[1];
};
static pthread_mutex_t cdb2_event_mutex = PTHREAD_MUTEX_INITIALIZER;
static cdb2_event cdb2_gbl_events;
static int cdb2_gbl_event_version;
static cdb2_event *cdb2_next_callback(cdb2_hndl_tp *, cdb2_event_type,
cdb2_event *);
static void *cdb2_invoke_callback(cdb2_hndl_tp *, cdb2_event *, int, ...);
static int refresh_gbl_events_on_hndl(cdb2_hndl_tp *);
#define PROCESS_EVENT_CTRL_BEFORE(h, e, rc, callbackrc, ovwrrc) \
do { \
if (e->ctrls & CDB2_OVERWRITE_RETURN_VALUE) { \
ovwrrc = 1; \
rc = (int)(intptr_t)callbackrc; \
} \
if (e->ctrls & CDB2_AS_HANDLE_SPECIFIC_ARG) \
h->user_arg = callbackrc; \
} while (0)
#define PROCESS_EVENT_CTRL_AFTER(h, e, rc, callbackrc) \
do { \
if (e->ctrls & CDB2_OVERWRITE_RETURN_VALUE) { \
rc = (int)(intptr_t)callbackrc; \
} \
if (e->ctrls & CDB2_AS_HANDLE_SPECIFIC_ARG) \
h->user_arg = callbackrc; \
} while (0)
typedef void (*cdb2_init_t)(void);
/* Undocumented compile-time library installation/uninstallation routine. */
#ifndef CDB2_INSTALL_LIBS
#define CDB2_INSTALL_LIBS NULL
#else
extern void CDB2_INSTALL_LIBS(void);
#endif
void (*cdb2_install)(void) = CDB2_INSTALL_LIBS;
#ifndef CDB2_UNINSTALL_LIBS
#define CDB2_UNINSTALL_LIBS NULL
#else
extern void CDB2_UNINSTALL_LIBS(void);
#endif
void (*cdb2_uninstall)(void) = CDB2_UNINSTALL_LIBS;
#ifndef CDB2_IDENTITY_CALLBACKS
struct cdb2_identity *identity_cb = NULL;
#else
struct cdb2_identity *identity_cb = CDB2_IDENTITY_CALLBACKS;
#endif
#ifndef WITH_DL_LIBS
#define WITH_DL_LIBS 0
#endif
#if WITH_DL_LIBS
#include <dlfcn.h>
void cdb2_set_install_libs(void (*ptr)(void)) { cdb2_install = ptr; }
void cdb2_set_uninstall_libs(void (*ptr)(void)) { cdb2_uninstall = ptr; }
#endif
#define debugprint(fmt, args...) \
do { \
if (hndl && hndl->debug_trace) \
fprintf(stderr, "td 0x%p %s:%d " fmt, (void *)pthread_self(), \
__func__, __LINE__, ##args); \
} while (0);
/*
** NOTE: This function is designed to reset the internal state of this module,
** related to the configuration, back to initial defaults. It should
** allow for the subsequent reconfiguration using different parameters.
** Currently, it is surfaced via passing a NULL value to the public APIs
** cdb2_set_comdb2db_config() and cdb2_set_comdb2db_info().
*/
static void reset_the_configuration(void)
{
if (log_calls)
fprintf(stderr, "%p> %s()\n", (void *)pthread_self(), __func__);
memset(CDB2DBCONFIG_NOBBENV, 0, sizeof(CDB2DBCONFIG_NOBBENV));
strncpy(CDB2DBCONFIG_NOBBENV, CDB2DBCONFIG_NOBBENV_DEFAULT, 511);
memset(CDB2DBCONFIG_TEMP_BB_BIN, 0, sizeof(CDB2DBCONFIG_TEMP_BB_BIN));
strncpy(CDB2DBCONFIG_TEMP_BB_BIN, CDB2DBCONFIG_TEMP_BB_BIN_DEFAULT, 511);
if (CDB2DBCONFIG_BUF != NULL) {
free(CDB2DBCONFIG_BUF);
CDB2DBCONFIG_BUF = NULL;
}
memset(cdb2_default_cluster, 0, sizeof(cdb2_default_cluster));
memset(cdb2_comdb2dbname, 0, sizeof(cdb2_comdb2dbname));
memset(cdb2_dnssuffix, 0, sizeof(cdb2_dnssuffix));
memset(cdb2_machine_room, 0, sizeof(cdb2_machine_room));
CDB2_PORTMUXPORT = CDB2_PORTMUXPORT_DEFAULT;
MAX_RETRIES = MAX_RETRIES_DEFAULT;
MIN_RETRIES = MIN_RETRIES_DEFAULT;
CDB2_CONNECT_TIMEOUT = CDB2_CONNECT_TIMEOUT_DEFAULT;
CDB2_API_CALL_TIMEOUT = CDB2_API_CALL_TIMEOUT_DEFAULT;
CDB2_SOCKET_TIMEOUT = CDB2_SOCKET_TIMEOUT_DEFAULT;
CDB2_POLL_TIMEOUT = CDB2_POLL_TIMEOUT_DEFAULT;
CDB2_AUTO_CONSUME_TIMEOUT_MS = CDB2_AUTO_CONSUME_TIMEOUT_MS_DEFAULT;
COMDB2DB_TIMEOUT = COMDB2DB_TIMEOUT_DEFAULT;
CDB2_API_CALL_TIMEOUT = CDB2_API_CALL_TIMEOUT_DEFAULT;
CDB2_SOCKET_TIMEOUT = CDB2_SOCKET_TIMEOUT_DEFAULT;
CDB2_PROTOBUF_SIZE = CDB2_PROTOBUF_SIZE_DEFAULT;
cdb2_tcpbufsz = CDB2_TCPBUFSZ_DEFAULT;
cdb2_allow_pmux_route = CDB2_ALLOW_PMUX_ROUTE_DEFAULT;
cdb2cfg_override = CDB2CFG_OVERRIDE_DEFAULT;
CDB2_REQUEST_FP = CDB2_REQUEST_FP_DEFAULT;
CDB2_GET_HOSTNAME_FROM_SOCKPOOL_FD = CDB2_GET_HOSTNAME_FROM_SOCKPOOL_FD_DEFAULT;
cdb2_c_ssl_mode = SSL_ALLOW;
memset(cdb2_sslcertpath, 0, sizeof(cdb2_sslcertpath));
memset(cdb2_sslcert, 0, sizeof(cdb2_sslcert));
memset(cdb2_sslkey, 0, sizeof(cdb2_sslkey));
memset(cdb2_sslca, 0, sizeof(cdb2_sslca));
memset(cdb2_sslcrl, 0, sizeof(cdb2_sslcrl));
cdb2_nid_dbname = CDB2_NID_DBNAME_DEFAULT;
cdb2_cache_ssl_sess = CDB2_CACHE_SSL_SESS_DEFAULT;
cdb2_min_tls_ver = CDB2_MIN_TLS_VER_DEFAULT;
reset_sockpool();
}
static SBUF2 *sbuf2openread(const char *filename)
{
int fd;
SBUF2 *s;
if ((fd = open(filename, O_RDONLY, 0)) < 0 ||
(s = sbuf2open(fd, 0)) == NULL) {
if (fd >= 0)
close(fd);
return NULL;
}
return s;
}
#if defined(__APPLE__)
#include <libproc.h>
static char *apple_getargv0(void)
{
static char argv0[PATH_MAX];
int ret = proc_pidpath(_PID, argv0, sizeof(argv0));
if (ret <= 0) {
fprintf(stderr, "%s proc_pidpath returns %d\n", __func__, ret);
return NULL;
}
return argv0;
}
#endif
#if defined(_SUN_SOURCE) || defined(_LINUX_SOURCE)
static char *proc_cmdline_getargv0(void)
{
char procname[64];
static char argv0[PATH_MAX];
snprintf(procname, sizeof(procname), "/proc/self/cmdline");
SBUF2 *s = sbuf2openread(procname);
if (s == NULL) {
fprintf(stderr, "%s cannot open %s, %s\n", __func__, procname,
strerror(errno));
return NULL;
}
if ((sbuf2gets(argv0, PATH_MAX, s)) < 0) {
fprintf(stderr, "%s error reading from %s, %s\n", __func__, procname,
strerror(errno));
sbuf2close(s);
return NULL;
}
sbuf2close(s);
return argv0;
}
#endif
#if defined(_IBM_SOURCE)
#include <sys/procfs.h>
#include <procinfo.h>
static char *ibm_getargv0(void)
{
struct procsinfo p;
static char argv0[PATH_MAX];
pid_t idx = _PID;
int rc;
if (1 == (rc = getprocs(&p, sizeof(p), NULL, 0, &idx, 1)) &&
_PID == p.pi_pid) {
strncpy(argv0, p.pi_comm, PATH_MAX);
argv0[PATH_MAX - 1] = '\0';
} else {
fprintf(stderr, "%s getprocs returns %d for pid %d\n", __func__, _PID);
return NULL;
}
return argv0;
}
#endif
#define SQLCACHEHINT "/*+ RUNCOMDB2SQL "
#define SQLCACHEHINTLENGTH 17
static int value_on_off(const char *value) {
if (strcasecmp("on", value) == 0) {
return 1;
} else if (strcasecmp("off", value) == 0) {
return 0;
} else if (strcasecmp("no", value) == 0) {
return 0;
} else if (strcasecmp("yes", value) == 0) {
return 1;
}
return atoi(value);
}
static inline const char *cdb2_skipws(const char *str)
{
while (*str && isspace(*str))
str++;
return str;
}
char *cdb2_getargv0(void)
{
#if defined(__APPLE__)
return apple_getargv0();
#elif defined(_LINUX_SOURCE) || defined(_SUN_SOURCE)
return proc_cmdline_getargv0();
#elif defined(_IBM_SOURCE)
return ibm_getargv0();
#else
fprintf(stderr, "%s unsupported architecture\n", __func__);
return NULL;
#endif
}
static void atfork_prepare(void) {
pthread_mutex_lock(&cdb2_sockpool_mutex);
if (identity_cb)
identity_cb->resetIdentity_start();
}
static void atfork_me(void) {
if (identity_cb)
identity_cb->resetIdentity_end(1);
pthread_mutex_unlock(&cdb2_sockpool_mutex);
}
static void sockpool_close_all(void);
static void atfork_child(void) {
sockpool_close_all();
_PID = getpid();
if (identity_cb)
identity_cb->resetIdentity_end(0);
pthread_mutex_unlock(&cdb2_sockpool_mutex);
}
static int init_once_has_run = 0;
static void do_init_once(void)
{
static pthread_mutex_t lk = PTHREAD_MUTEX_INITIALIZER;
if (init_once_has_run == 0) {
pthread_mutex_lock(&lk);
if (!init_once_has_run) {
srandom(time(0));
_PID = getpid();
_MACHINE_ID = gethostid();
_ARGV0 = cdb2_getargv0();
pthread_atfork(atfork_prepare, atfork_me, atfork_child);
init_once_has_run = 1;
}
pthread_mutex_unlock(&lk);
}
char *do_log = getenv("CDB2_LOG_CALLS");
if (do_log)
log_calls = 1;
char *config = getenv("CDB2_CONFIG_FILE");
if (config) {
/* can't call back cdb2_set_comdb2db_config from do_init_once */
strncpy(CDB2DBCONFIG_NOBBENV, config, 511);
}
}
/* if sqlstr is a read stmt will return 1 otherwise return 0
* returns -1 if sqlstr is null
*/
static int is_sql_read(const char *sqlstr)
{
const char get[] = "GET";
const char sp_exec[] = "EXEC";
const char with[] = "WITH";
const char sel[] = "SELECT";
const char explain[] = "EXPLAIN";
if (sqlstr == NULL)
return -1;
sqlstr = cdb2_skipws(sqlstr);
int slen = strlen(sqlstr);
if (slen) {
if (slen < sizeof(get) - 1)
return 0;
if (!strncasecmp(sqlstr, get, sizeof(get) - 1))
return 1;
if (slen < sizeof(sp_exec) - 1)
return 0;
if (!strncasecmp(sqlstr, sp_exec, sizeof(sp_exec) - 1))
return 1;
if (!strncasecmp(sqlstr, with, sizeof(with) - 1))
return 1;
if (slen < sizeof(sel) - 1)
return 0;
if (!strncasecmp(sqlstr, sel, sizeof(sel) - 1))
return 1;
if (slen < sizeof(explain) - 1)
return 0;
if (!strncasecmp(sqlstr, explain, sizeof(explain) - 1))
return 1;
}
return 0;
}
/* PASSFD CODE */
#if defined(_IBM_SOURCE) || defined(_LINUX_SOURCE)
#define HAVE_MSGHDR_MSG_CONTROL
#endif
enum {
PASSFD_SUCCESS = 0,
PASSFD_RECVMSG = -1, /* error with recvmsg() */
PASSFD_EOF = -2, /* eof before message completely read */
PASSFD_2FDS = -3, /* received more than one file descriptor */
PASSFD_BADCTRL = -4, /* received bad control message */
PASSFD_TIMEOUT = -5, /* timed out */
PASSFD_POLL = -6, /* error with poll() */
PASSFD_SENDMSG = -7 /* error with sendmsg() */
};
static int recv_fd_int(int sockfd, void *data, size_t nbytes, int *fd_recvd)
{
ssize_t rc;
size_t bytesleft;
char *cdata;
struct msghdr msg;
struct iovec iov[1];
int recvfd;
#ifdef HAVE_MSGHDR_MSG_CONTROL
union {
struct cmsghdr cm;
unsigned char control[CMSG_SPACE(sizeof(int))];
} control_un;
struct cmsghdr *cmsgptr;
#endif
*fd_recvd = -1;
cdata = data;
bytesleft = nbytes;
while (bytesleft > 0) {
#ifdef HAVE_MSGHDR_MSG_CONTROL
msg.msg_control = control_un.control;
msg.msg_controllen = sizeof(control_un.control);
msg.msg_flags = 0;
#else
msg.msg_accrights = (caddr_t)&recvfd;
msg.msg_accrightslen = sizeof(int);
#endif
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
iov[0].iov_base = cdata;
iov[0].iov_len = bytesleft;
rc = recvmsg(sockfd, &msg, 0);
if (rc == -1) {
if (errno == EINTR || errno == EAGAIN)
continue;
return PASSFD_RECVMSG;
}
if (rc == 0) {
/* Premature eof */
return PASSFD_EOF;
}
cdata += rc;
bytesleft -= rc;
/* See if we got a descriptor with this message */
#ifdef HAVE_MSGHDR_MSG_CONTROL
cmsgptr = CMSG_FIRSTHDR(&msg);
if (cmsgptr) {
if (cmsgptr->cmsg_len != CMSG_LEN(sizeof(int)) ||
cmsgptr->cmsg_level != SOL_SOCKET ||
cmsgptr->cmsg_type != SCM_RIGHTS) {
return PASSFD_BADCTRL;
}
recvfd = *((int *)CMSG_DATA(cmsgptr));
if (*fd_recvd != -1) {
if (close(recvfd) == -1) {
fprintf(stderr, "%s: error closing second fd %d: %d %s\n",
__func__, recvfd, errno, strerror(errno));
}
return PASSFD_2FDS;
}
*fd_recvd = recvfd;
if (CMSG_NXTHDR(&msg, cmsgptr)) {
return PASSFD_BADCTRL;
}
}
#else
if (msg.msg_accrightslen == sizeof(int)) {
if (*fd_recvd != -1) {
if (close(recvfd) == -1) {
fprintf(stderr, "%s: error closing second fd %d: %d %s\n",
__func__, recvfd, errno, strerror(errno));
}
return PASSFD_2FDS;
}
*fd_recvd = recvfd;
}
#endif
}
return PASSFD_SUCCESS;
}
/* This wrapper ensures that on error we close any file descriptor that we
* may have received before the error occured. Alse we make sure that we
* preserve the value of errno which may be needed if the error was
* PASSFD_RECVMSG. */
static int recv_fd(int sockfd, void *data, size_t nbytes, int *fd_recvd)
{
int rc;
rc = recv_fd_int(sockfd, data, nbytes, fd_recvd);
if (rc != 0 && *fd_recvd != -1) {
int errno_save = errno;
if (close(*fd_recvd) == -1) {
fprintf(stderr, "%s: close(%d) error: %d %s\n", __func__, *fd_recvd,
errno, strerror(errno));
}
*fd_recvd = -1;
errno = errno_save;
}
return rc;
}
static int send_fd_to(int sockfd, const void *data, size_t nbytes,
int fd_to_send, int timeoutms)
{
ssize_t rc;
size_t bytesleft;
struct msghdr msg;
struct iovec iov[1];
const char *cdata;
#ifdef HAVE_MSGHDR_MSG_CONTROL
union {
struct cmsghdr cm;
unsigned char control[CMSG_SPACE(sizeof(int))];
} control_un;
struct cmsghdr *cmsgptr;
#endif
bytesleft = nbytes;
cdata = data;
while (bytesleft > 0) {
if (timeoutms > 0) {
struct pollfd pol;
int pollrc;
pol.fd = sockfd;
pol.events = POLLOUT;
pollrc = poll(&pol, 1, timeoutms);
if (pollrc == 0) {
return PASSFD_TIMEOUT;
} else if (pollrc == -1) {
/* error will be in errno */
return PASSFD_POLL;
}
}
if (fd_to_send != -1) {
#ifdef HAVE_MSGHDR_MSG_CONTROL
msg.msg_control = control_un.control;
msg.msg_controllen = sizeof(control_un.control);
msg.msg_flags = 0;
cmsgptr = CMSG_FIRSTHDR(&msg);
cmsgptr->cmsg_len = CMSG_LEN(sizeof(int));
cmsgptr->cmsg_level = SOL_SOCKET;
cmsgptr->cmsg_type = SCM_RIGHTS;
*((int *)CMSG_DATA(cmsgptr)) = fd_to_send;
#else
msg.msg_accrights = (caddr_t)&fd_to_send;
msg.msg_accrightslen = sizeof(int);
#endif
} else {
#ifdef HAVE_MSGHDR_MSG_CONTROL
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = 0;
#else
msg.msg_accrights = NULL;
msg.msg_accrightslen = 0;
#endif
}
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
iov[0].iov_base = (caddr_t)cdata;
iov[0].iov_len = bytesleft;
rc = sendmsg(sockfd, &msg, 0);
if (rc == -1) {
if (errno == EINTR || errno == EAGAIN)
continue;
return PASSFD_SENDMSG;
}
if (rc == 0) {
return PASSFD_EOF;
}
/* We didn't get an error, so the fd must have been sent. */
fd_to_send = -1;
cdata += rc;
bytesleft -= rc;
}
return PASSFD_SUCCESS;
}
static int send_fd(int sockfd, const void *data, size_t nbytes, int fd_to_send)
{
return send_fd_to(sockfd, data, nbytes, fd_to_send, 0);
}
static int cdb2_tcpresolve(const char *host, struct in_addr *in, int *port)
{
/*RESOLVE AN ADDRESS*/
in_addr_t inaddr;
int len;
struct hostent *hp = NULL;
char tok[128], *cc;
cc = strchr(host, (int)':');
if (cc == 0) {
len = strlen(host);
if (len >= sizeof(tok))
return -2;
memcpy(tok, host, len);
tok[len] = 0;
} else {
*port = atoi(cc + 1);
len = (int)(cc - host);
if (len >= sizeof(tok))
return -2;
memcpy(tok, host, len);
tok[len] = 0;
}
if ((inaddr = inet_addr(tok)) != (in_addr_t)-1) {
/* it's dotted-decimal */
memcpy(&in->s_addr, &inaddr, sizeof(inaddr));
} else {
#ifdef __APPLE__
hp = gethostbyname(tok);
#elif _LINUX_SOURCE
int herr;
char tmp[8192];
int tmplen = 8192;
struct hostent hostbuf;
gethostbyname_r(tok, &hostbuf, tmp, tmplen, &hp, &herr);
#elif _SUN_SOURCE
int herr;
char tmp[8192];
int tmplen = 8192;
struct hostent hostbuf;
hp = gethostbyname_r(tok, &hostbuf, tmp, tmplen, &herr);
#else
hp = gethostbyname(tok);
#endif
if (hp == NULL) {
fprintf(stderr, "%s:gethostbyname(%s): errno=%d err=%s\n", __func__,
tok, errno, strerror(errno));
return -1;
}
memcpy(&in->s_addr, hp->h_addr, hp->h_length);
}
return 0;
}
static int lclconn(int s, const struct sockaddr *name, int namelen,
int timeoutms)
{
/* connect with timeout */
struct pollfd pfd;
int flags, rc;
int err;
socklen_t len;
if (timeoutms <= 0)
return connect(s, name, namelen); /*no timeout specified*/
flags = fcntl(s, F_GETFL, 0);
if (flags < 0)
return -1;
if (fcntl(s, F_SETFL, flags | O_NONBLOCK) < 0) {
return -1;
}
rc = connect(s, name, namelen);
if (rc == -1 && errno == EINPROGRESS) {
/*wait for connect event */
pfd.fd = s;
pfd.events = POLLOUT;
rc = poll(&pfd, 1, timeoutms);
if (rc == 0) {
/*timeout*/
/*fprintf(stderr,"connect timed out\n");*/
return -2;
}
if (rc != 1) { /*poll failed?*/
return -1;
}
if ((pfd.revents & POLLOUT) == 0) { /*wrong event*/
/*fprintf(stderr,"poll event %d\n",pfd.revents);*/
return -1;
}
} else if (rc == -1) {
/*connect failed?*/
return -1;
}
if (fcntl(s, F_SETFL, flags) < 0) {
return -1;
}
len = sizeof(err);
if (getsockopt(s, SOL_SOCKET, SO_ERROR, &err, &len)) {
return -1;
}
errno = err;
if (errno != 0)
return -1;
return 0;
}
static int cdb2_do_tcpconnect(struct in_addr in, int port, int myport,
int timeoutms)
{
int sockfd, rc;
int sendbuff;
struct sockaddr_in tcp_srv_addr; /* server's Internet socket addr */
struct sockaddr_in my_addr; /* my Internet address */
bzero((char *)&tcp_srv_addr, sizeof tcp_srv_addr);
tcp_srv_addr.sin_family = AF_INET;
if (port <= 0) {
return -1;
}
tcp_srv_addr.sin_port = htons(port);
memcpy(&tcp_srv_addr.sin_addr, &in.s_addr, sizeof(in.s_addr));
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
fprintf(stderr, "tcpconnect_to: can't create TCP socket\n");
return -1;
}
#if 0
/* Allow connect port to be re-used */
sendbuff = 1; /* enable option */
if (setsockopt( sockfd, SOL_SOCKET, SO_REUSEADDR, (char *)&sendbuff,
sizeof sendbuff ) < 0)
{
fprintf(stderr,"tcpconnect_to: setsockopt failure\n" );
close( sockfd );
return -1;
}
#endif
sendbuff = 1; /* enable option */
if (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, (char *)&sendbuff,
sizeof sendbuff) < 0) {
fprintf(stderr, "tcpconnect_to: setsockopt failure\n");
close(sockfd);
return -1;
}
struct linger ling;
ling.l_onoff = 1;
ling.l_linger = 0;
if (setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (char *)&ling, sizeof(ling)) <
0) {
fprintf(stderr, "tcpconnect_to: setsockopt failure:%s",
strerror(errno));
close(sockfd);
return -1;
}
if (cdb2_tcpbufsz) {
int tcpbufsz = cdb2_tcpbufsz;
if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, (char *)&tcpbufsz,
sizeof(tcpbufsz)) < 0) {
fprintf(stderr, "tcpconnect_to: setsockopt failure:%s",
strerror(errno));
close(sockfd);
return -1;
}
}
if (myport > 0) { /* want to use specific port on local host */
bzero((char *)&my_addr, sizeof my_addr);
my_addr.sin_family = AF_INET;
my_addr.sin_addr.s_addr = INADDR_ANY;
my_addr.sin_port = htons((u_short)myport);
if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof my_addr) < 0) {
fprintf(stderr, "tcpconnect_to: bind failed on local port %d: %s",
myport, strerror(errno));
close(sockfd);
return -1;
}
}
/* Connect to the server. */
rc = lclconn(sockfd, (struct sockaddr *)&tcp_srv_addr, sizeof(tcp_srv_addr),
timeoutms);
if (rc < 0) {
close(sockfd);
return rc;
}
return (sockfd); /* all OK */
}
struct context_messages {
char *message[MAX_CONTEXTS];
int count;
int has_changed;
};
/* Forward declarations. */
static void cdb2_init_context_msgs(cdb2_hndl_tp *hndl);
static int cdb2_free_context_msgs(cdb2_hndl_tp *hndl);
/* Make it equal to FSQL header. */
struct newsqlheader {
int type;
int compression;
int state; /* query state */
int length;
};
typedef struct cdb2_query_list_item {
void *buf;
int len;
int is_read;
char *sql;
struct cdb2_query_list_item *next;
} cdb2_query_list;
struct cdb2_ssl_sess {
struct cdb2_ssl_sess *next;
char dbname[64];
char cluster[64];
int ref;
SSL_SESSION *sessobj;
};
static cdb2_ssl_sess cdb2_ssl_sess_cache;
/* A cnonce is composed of
- 32 bits of machine ID
- 32 bits of process PID
- 32 or 64 bits of handle address
- 52 bits for the epoch time in microseconds
- 12 bits for the sequence number
The allocation allows a handle to run at a maximum transaction rate of
4096 txn/us (~4 billion transactions per second) till September 17, 2112.
See next_cnonce() for details. */
#define CNONCE_STR_FMT "%lx-%x-%llx-"
#define CNONCE_STR_SZ 60 /* 16 + 1 + 8 + 1 + 16 + 1 + 16 + 1 (NUL) */
#define CNT_BITS 12
#define TIME_MASK (-1ULL << CNT_BITS)
#define CNT_MASK (-1ULL ^ TIME_MASK)
typedef struct cnonce {
long hostid;
int pid;
struct cdb2_hndl *hndl;
uint64_t seq;
int ofs;
char str[CNONCE_STR_SZ];
} cnonce_t;