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-rw-r--r--contrib/hiredis/net.c464
1 files changed, 464 insertions, 0 deletions
diff --git a/contrib/hiredis/net.c b/contrib/hiredis/net.c
new file mode 100644
index 0000000..97fd42c
--- /dev/null
+++ b/contrib/hiredis/net.c
@@ -0,0 +1,464 @@
+/* Extracted from anet.c to work properly with Hiredis error reporting.
+ *
+ * Copyright (c) 2009-2011, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2010-2014, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ * Copyright (c) 2015, Matt Stancliff <matt at genges dot com>,
+ * Jan-Erik Rediger <janerik at fnordig dot com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Redis nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "fmacros.h"
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <netdb.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <poll.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#include "net.h"
+#include "sds.h"
+
+/* Defined in hiredis.c */
+void __redisSetError(redisContext *c, int type, const char *str);
+
+static void redisContextCloseFd(redisContext *c) {
+ if (c && c->fd >= 0) {
+ close(c->fd);
+ c->fd = -1;
+ }
+}
+
+static void __redisSetErrorFromErrno(redisContext *c, int type, const char *prefix) {
+ char buf[128] = { 0 };
+ char *p;
+ size_t len = 0;
+
+ if (prefix != NULL)
+ len = snprintf(buf,sizeof(buf),"%s: ",prefix);
+ p = buf + len;
+ __redis_strerror_r(errno, p, sizeof(buf) - len);
+ __redisSetError(c,type,buf);
+}
+
+static int redisSetReuseAddr(redisContext *c) {
+ int on = 1;
+ if (setsockopt(c->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
+ redisContextCloseFd(c);
+ return REDIS_ERR;
+ }
+ return REDIS_OK;
+}
+
+static int redisCreateSocket(redisContext *c, int type) {
+ int s;
+ if ((s = socket(type, SOCK_STREAM, 0)) == -1) {
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
+ return REDIS_ERR;
+ }
+ c->fd = s;
+ if (type == AF_INET) {
+ if (redisSetReuseAddr(c) == REDIS_ERR) {
+ return REDIS_ERR;
+ }
+ }
+ return REDIS_OK;
+}
+
+static int redisSetBlocking(redisContext *c, int blocking) {
+ int flags;
+
+ /* Set the socket nonblocking.
+ * Note that fcntl(2) for F_GETFL and F_SETFL can't be
+ * interrupted by a signal. */
+ if ((flags = fcntl(c->fd, F_GETFL)) == -1) {
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,"fcntl(F_GETFL)");
+ redisContextCloseFd(c);
+ return REDIS_ERR;
+ }
+
+ if (blocking)
+ flags &= ~O_NONBLOCK;
+ else
+ flags |= O_NONBLOCK;
+
+ if (fcntl(c->fd, F_SETFL, flags) == -1) {
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,"fcntl(F_SETFL)");
+ redisContextCloseFd(c);
+ return REDIS_ERR;
+ }
+ return REDIS_OK;
+}
+
+int redisKeepAlive(redisContext *c, int interval) {
+ int val = 1;
+ int fd = c->fd;
+
+ if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &val, sizeof(val)) == -1){
+ __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
+ return REDIS_ERR;
+ }
+
+ val = interval;
+
+#ifdef _OSX
+ if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPALIVE, &val, sizeof(val)) < 0) {
+ __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
+ return REDIS_ERR;
+ }
+#else
+#if defined(__GLIBC__) && !defined(__FreeBSD_kernel__)
+ val = interval;
+ if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof(val)) < 0) {
+ __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
+ return REDIS_ERR;
+ }
+
+ val = interval/3;
+ if (val == 0) val = 1;
+ if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof(val)) < 0) {
+ __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
+ return REDIS_ERR;
+ }
+
+ val = 3;
+ if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof(val)) < 0) {
+ __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
+ return REDIS_ERR;
+ }
+#endif
+#endif
+
+ return REDIS_OK;
+}
+
+static int redisSetTcpNoDelay(redisContext *c) {
+ int yes = 1;
+ if (setsockopt(c->fd, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes)) == -1) {
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,"setsockopt(TCP_NODELAY)");
+ redisContextCloseFd(c);
+ return REDIS_ERR;
+ }
+ return REDIS_OK;
+}
+
+#define __MAX_MSEC (((LONG_MAX) - 999) / 1000)
+
+static int redisContextWaitReady(redisContext *c, const struct timeval *timeout) {
+ struct pollfd wfd[1];
+ long msec;
+
+ msec = -1;
+ wfd[0].fd = c->fd;
+ wfd[0].events = POLLOUT;
+
+ /* Only use timeout when not NULL. */
+ if (timeout != NULL) {
+ if (timeout->tv_usec > 1000000 || timeout->tv_sec > __MAX_MSEC) {
+ __redisSetErrorFromErrno(c, REDIS_ERR_IO, NULL);
+ redisContextCloseFd(c);
+ return REDIS_ERR;
+ }
+
+ msec = (timeout->tv_sec * 1000) + ((timeout->tv_usec + 999) / 1000);
+
+ if (msec < 0 || msec > INT_MAX) {
+ msec = INT_MAX;
+ }
+ }
+
+ if (errno == EINPROGRESS) {
+ int res;
+
+ if ((res = poll(wfd, 1, msec)) == -1) {
+ __redisSetErrorFromErrno(c, REDIS_ERR_IO, "poll(2)");
+ redisContextCloseFd(c);
+ return REDIS_ERR;
+ } else if (res == 0) {
+ errno = ETIMEDOUT;
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
+ redisContextCloseFd(c);
+ return REDIS_ERR;
+ }
+
+ if (redisCheckSocketError(c) != REDIS_OK)
+ return REDIS_ERR;
+
+ return REDIS_OK;
+ }
+
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
+ redisContextCloseFd(c);
+ return REDIS_ERR;
+}
+
+int redisCheckSocketError(redisContext *c) {
+ int err = 0;
+ socklen_t errlen = sizeof(err);
+
+ if (getsockopt(c->fd, SOL_SOCKET, SO_ERROR, &err, &errlen) == -1) {
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,"getsockopt(SO_ERROR)");
+ return REDIS_ERR;
+ }
+
+ if (err) {
+ errno = err;
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
+ return REDIS_ERR;
+ }
+
+ return REDIS_OK;
+}
+
+int redisContextSetTimeout(redisContext *c, const struct timeval tv) {
+ if (setsockopt(c->fd,SOL_SOCKET,SO_RCVTIMEO,&tv,sizeof(tv)) == -1) {
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,"setsockopt(SO_RCVTIMEO)");
+ return REDIS_ERR;
+ }
+ if (setsockopt(c->fd,SOL_SOCKET,SO_SNDTIMEO,&tv,sizeof(tv)) == -1) {
+ __redisSetErrorFromErrno(c,REDIS_ERR_IO,"setsockopt(SO_SNDTIMEO)");
+ return REDIS_ERR;
+ }
+ return REDIS_OK;
+}
+
+static int _redisContextConnectTcp(redisContext *c, const char *addr, int port,
+ const struct timeval *timeout,
+ const char *source_addr) {
+ int s, rv, n;
+ char _port[6]; /* strlen("65535"); */
+ struct addrinfo hints, *servinfo, *bservinfo, *p, *b;
+ int blocking = (c->flags & REDIS_BLOCK);
+ int reuseaddr = (c->flags & REDIS_REUSEADDR);
+ int reuses = 0;
+
+ c->connection_type = REDIS_CONN_TCP;
+ c->tcp.port = port;
+
+ /* We need to take possession of the passed parameters
+ * to make them reusable for a reconnect.
+ * We also carefully check we don't free data we already own,
+ * as in the case of the reconnect method.
+ *
+ * This is a bit ugly, but atleast it works and doesn't leak memory.
+ **/
+ if (c->tcp.host != addr) {
+ if (c->tcp.host)
+ free(c->tcp.host);
+
+ c->tcp.host = strdup(addr);
+ }
+
+ if (timeout) {
+ if (c->timeout != timeout) {
+ if (c->timeout == NULL)
+ c->timeout = malloc(sizeof(struct timeval));
+
+ memcpy(c->timeout, timeout, sizeof(struct timeval));
+ }
+ } else {
+ if (c->timeout)
+ free(c->timeout);
+ c->timeout = NULL;
+ }
+
+ if (source_addr == NULL) {
+ free(c->tcp.source_addr);
+ c->tcp.source_addr = NULL;
+ } else if (c->tcp.source_addr != source_addr) {
+ free(c->tcp.source_addr);
+ c->tcp.source_addr = strdup(source_addr);
+ }
+
+ snprintf(_port, 6, "%d", port);
+ memset(&hints,0,sizeof(hints));
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_STREAM;
+ if (!blocking) {
+ /* Rspamd specific: never try to resolve on non-blocking conn requests */
+ hints.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV;
+ }
+
+ /* Try with IPv6 if no IPv4 address was found. We do it in this order since
+ * in a Redis client you can't afford to test if you have IPv6 connectivity
+ * as this would add latency to every connect. Otherwise a more sensible
+ * route could be: Use IPv6 if both addresses are available and there is IPv6
+ * connectivity. */
+ if ((rv = getaddrinfo(c->tcp.host,_port,&hints,&servinfo)) != 0) {
+ hints.ai_family = AF_INET6;
+ if ((rv = getaddrinfo(addr,_port,&hints,&servinfo)) != 0) {
+ __redisSetError(c,REDIS_ERR_OTHER,gai_strerror(rv));
+ return REDIS_ERR;
+ }
+ }
+ for (p = servinfo; p != NULL; p = p->ai_next) {
+addrretry:
+ if ((s = socket(p->ai_family,p->ai_socktype,p->ai_protocol)) == -1)
+ continue;
+
+ c->fd = s;
+ if (redisSetBlocking(c,0) != REDIS_OK)
+ goto error;
+ if (c->tcp.source_addr) {
+ int bound = 0;
+ /* Using getaddrinfo saves us from self-determining IPv4 vs IPv6 */
+ if ((rv = getaddrinfo(c->tcp.source_addr, NULL, &hints, &bservinfo)) != 0) {
+ char buf[128];
+ snprintf(buf,sizeof(buf),"Can't get addr: %s",gai_strerror(rv));
+ __redisSetError(c,REDIS_ERR_OTHER,buf);
+ goto error;
+ }
+
+ if (reuseaddr) {
+ n = 1;
+ if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*) &n,
+ sizeof(n)) < 0) {
+ goto error;
+ }
+ }
+
+ for (b = bservinfo; b != NULL; b = b->ai_next) {
+ if (bind(s,b->ai_addr,b->ai_addrlen) != -1) {
+ bound = 1;
+ break;
+ }
+ }
+ freeaddrinfo(bservinfo);
+ if (!bound) {
+ char buf[128];
+ snprintf(buf,sizeof(buf),"Can't bind socket: %s",strerror(errno));
+ __redisSetError(c,REDIS_ERR_OTHER,buf);
+ goto error;
+ }
+ }
+ if (redisSetTcpNoDelay(c) != REDIS_OK)
+ goto error;
+ if (connect(s,p->ai_addr,p->ai_addrlen) == -1) {
+ if (errno == EHOSTUNREACH) {
+ redisContextCloseFd(c);
+ continue;
+ } else if (errno == EINPROGRESS && !blocking) {
+ /* This is ok. */
+ } else if (errno == EADDRNOTAVAIL && reuseaddr) {
+ if (++reuses >= REDIS_CONNECT_RETRIES) {
+ goto error;
+ } else {
+ goto addrretry;
+ }
+ } else {
+ if (redisContextWaitReady(c,c->timeout) != REDIS_OK)
+ goto error;
+ }
+ }
+
+ c->flags |= REDIS_CONNECTED;
+ rv = REDIS_OK;
+ goto end;
+ }
+ if (blocking && redisSetBlocking(c,1) != REDIS_OK)
+ goto error;
+ if (p == NULL) {
+ char buf[128];
+ snprintf(buf,sizeof(buf),"Can't create socket: %s",strerror(errno));
+ __redisSetError(c,REDIS_ERR_OTHER,buf);
+ goto error;
+ }
+
+error:
+ rv = REDIS_ERR;
+end:
+ freeaddrinfo(servinfo);
+ return rv; // Need to return REDIS_OK if alright
+}
+
+int redisContextConnectTcp(redisContext *c, const char *addr, int port,
+ const struct timeval *timeout) {
+ return _redisContextConnectTcp(c, addr, port, timeout, NULL);
+}
+
+int redisContextConnectBindTcp(redisContext *c, const char *addr, int port,
+ const struct timeval *timeout,
+ const char *source_addr) {
+ return _redisContextConnectTcp(c, addr, port, timeout, source_addr);
+}
+
+int redisContextConnectUnix(redisContext *c, const char *path, const struct timeval *timeout) {
+ int blocking = (c->flags & REDIS_BLOCK);
+ struct sockaddr_un sa;
+
+ if (redisCreateSocket(c,AF_LOCAL) < 0)
+ return REDIS_ERR;
+ if (redisSetBlocking(c,0) != REDIS_OK)
+ return REDIS_ERR;
+
+ c->connection_type = REDIS_CONN_UNIX;
+ if (c->unix_sock.path != path)
+ c->unix_sock.path = strdup(path);
+
+ if (timeout) {
+ if (c->timeout != timeout) {
+ if (c->timeout == NULL)
+ c->timeout = malloc(sizeof(struct timeval));
+
+ memcpy(c->timeout, timeout, sizeof(struct timeval));
+ }
+ } else {
+ if (c->timeout)
+ free(c->timeout);
+ c->timeout = NULL;
+ }
+
+ sa.sun_family = AF_LOCAL;
+ strncpy(sa.sun_path,path,sizeof(sa.sun_path)-1);
+ if (connect(c->fd, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
+ if (errno == EINPROGRESS && !blocking) {
+ /* This is ok. */
+ } else {
+ if (redisContextWaitReady(c,c->timeout) != REDIS_OK)
+ return REDIS_ERR;
+ }
+ }
+
+ /* Reset socket to be blocking after connect(2). */
+ if (blocking && redisSetBlocking(c,1) != REDIS_OK)
+ return REDIS_ERR;
+
+ c->flags |= REDIS_CONNECTED;
+ return REDIS_OK;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 05:53:13 +0000