[redis.git] / src / anet.c

/* anet.c -- Basic TCP socket stuff made a bit less boring
 *
 * Copyright (c) 2006-2012, Salvatore Sanfilippo <antirez at gmail 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/stat.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 "anet.h"

static void anetSetError(char *err, const char *fmt, ...)
{
    va_list ap;

    if (!err) return;
    va_start(ap, fmt);
    vsnprintf(err, ANET_ERR_LEN, fmt, ap);
    va_end(ap);
}

int anetNonBlock(char *err, int fd)
{
    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(fd, F_GETFL)) == -1) {
        anetSetError(err, "fcntl(F_GETFL): %s", strerror(errno));
        return ANET_ERR;
    }
    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
        anetSetError(err, "fcntl(F_SETFL,O_NONBLOCK): %s", strerror(errno));
        return ANET_ERR;
    }
    return ANET_OK;
}

int anetTcpNoDelay(char *err, int fd)
{
    int yes = 1;
    if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes)) == -1)
    {
        anetSetError(err, "setsockopt TCP_NODELAY: %s", strerror(errno));
        return ANET_ERR;
    }
    return ANET_OK;
}

int anetSetSendBuffer(char *err, int fd, int buffsize)
{
    if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &buffsize, sizeof(buffsize)) == -1)
    {
        anetSetError(err, "setsockopt SO_SNDBUF: %s", strerror(errno));
        return ANET_ERR;
    }
    return ANET_OK;
}

int anetTcpKeepAlive(char *err, int fd)
{
    int yes = 1;
    if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) == -1) {
        anetSetError(err, "setsockopt SO_KEEPALIVE: %s", strerror(errno));
        return ANET_ERR;
    }
    return ANET_OK;
}

int anetResolve(char *err, char *host, char *ipbuf)
{
    struct sockaddr_in sa;

    sa.sin_family = AF_INET;
    if (inet_aton(host, &sa.sin_addr) == 0) {
        struct hostent *he;

        he = gethostbyname(host);
        if (he == NULL) {
            anetSetError(err, "can't resolve: %s", host);
            return ANET_ERR;
        }
        memcpy(&sa.sin_addr, he->h_addr, sizeof(struct in_addr));
    }
    strcpy(ipbuf,inet_ntoa(sa.sin_addr));
    return ANET_OK;
}

static int anetCreateSocket(char *err, int domain) {
    int s, on = 1;
    if ((s = socket(domain, SOCK_STREAM, 0)) == -1) {
        anetSetError(err, "creating socket: %s", strerror(errno));
        return ANET_ERR;
    }

    /* Make sure connection-intensive things like the redis benckmark
     * will be able to close/open sockets a zillion of times */
    if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
        anetSetError(err, "setsockopt SO_REUSEADDR: %s", strerror(errno));
        return ANET_ERR;
    }
    return s;
}

#define ANET_CONNECT_NONE 0
#define ANET_CONNECT_NONBLOCK 1
static int anetTcpGenericConnect(char *err, char *addr, int port, int flags)
{
    int s;
    struct sockaddr_in sa;

    if ((s = anetCreateSocket(err,AF_INET)) == ANET_ERR)
        return ANET_ERR;

    sa.sin_family = AF_INET;
    sa.sin_port = htons(port);
    if (inet_aton(addr, &sa.sin_addr) == 0) {
        struct hostent *he;

        he = gethostbyname(addr);
        if (he == NULL) {
            anetSetError(err, "can't resolve: %s", addr);
            close(s);
            return ANET_ERR;
        }
        memcpy(&sa.sin_addr, he->h_addr, sizeof(struct in_addr));
    }
    if (flags & ANET_CONNECT_NONBLOCK) {
        if (anetNonBlock(err,s) != ANET_OK)
            return ANET_ERR;
    }
    if (connect(s, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
        if (errno == EINPROGRESS &&
            flags & ANET_CONNECT_NONBLOCK)
            return s;

        anetSetError(err, "connect: %s", strerror(errno));
        close(s);
        return ANET_ERR;
    }
    return s;
}

int anetTcpConnect(char *err, char *addr, int port)
{
    return anetTcpGenericConnect(err,addr,port,ANET_CONNECT_NONE);
}

int anetTcpNonBlockConnect(char *err, char *addr, int port)
{
    return anetTcpGenericConnect(err,addr,port,ANET_CONNECT_NONBLOCK);
}

int anetUnixGenericConnect(char *err, char *path, int flags)
{
    int s;
    struct sockaddr_un sa;

    if ((s = anetCreateSocket(err,AF_LOCAL)) == ANET_ERR)
        return ANET_ERR;

    sa.sun_family = AF_LOCAL;
    strncpy(sa.sun_path,path,sizeof(sa.sun_path)-1);
    if (flags & ANET_CONNECT_NONBLOCK) {
        if (anetNonBlock(err,s) != ANET_OK)
            return ANET_ERR;
    }
    if (connect(s,(struct sockaddr*)&sa,sizeof(sa)) == -1) {
        if (errno == EINPROGRESS &&
            flags & ANET_CONNECT_NONBLOCK)
            return s;

        anetSetError(err, "connect: %s", strerror(errno));
        close(s);
        return ANET_ERR;
    }
    return s;
}

int anetUnixConnect(char *err, char *path)
{
    return anetUnixGenericConnect(err,path,ANET_CONNECT_NONE);
}

int anetUnixNonBlockConnect(char *err, char *path)
{
    return anetUnixGenericConnect(err,path,ANET_CONNECT_NONBLOCK);
}

/* Like read(2) but make sure 'count' is read before to return
 * (unless error or EOF condition is encountered) */
int anetRead(int fd, char *buf, int count)
{
    int nread, totlen = 0;
    while(totlen != count) {
        nread = read(fd,buf,count-totlen);
        if (nread == 0) return totlen;
        if (nread == -1) return -1;
        totlen += nread;
        buf += nread;
    }
    return totlen;
}

/* Like write(2) but make sure 'count' is read before to return
 * (unless error is encountered) */
int anetWrite(int fd, char *buf, int count)
{
    int nwritten, totlen = 0;
    while(totlen != count) {
        nwritten = write(fd,buf,count-totlen);
        if (nwritten == 0) return totlen;
        if (nwritten == -1) return -1;
        totlen += nwritten;
        buf += nwritten;
    }
    return totlen;
}

static int anetListen(char *err, int s, struct sockaddr *sa, socklen_t len) {
    if (bind(s,sa,len) == -1) {
        anetSetError(err, "bind: %s", strerror(errno));
        close(s);
        return ANET_ERR;
    }

    /* Use a backlog of 512 entries. We pass 511 to the listen() call because
     * the kernel does: backlogsize = roundup_pow_of_two(backlogsize + 1);
     * which will thus give us a backlog of 512 entries */
    if (listen(s, 511) == -1) {
        anetSetError(err, "listen: %s", strerror(errno));
        close(s);
        return ANET_ERR;
    }
    return ANET_OK;
}

int anetTcpServer(char *err, int port, char *bindaddr)
{
    int s;
    struct sockaddr_in sa;

    if ((s = anetCreateSocket(err,AF_INET)) == ANET_ERR)
        return ANET_ERR;

    memset(&sa,0,sizeof(sa));
    sa.sin_family = AF_INET;
    sa.sin_port = htons(port);
    sa.sin_addr.s_addr = htonl(INADDR_ANY);
    if (bindaddr && inet_aton(bindaddr, &sa.sin_addr) == 0) {
        anetSetError(err, "invalid bind address");
        close(s);
        return ANET_ERR;
    }
    if (anetListen(err,s,(struct sockaddr*)&sa,sizeof(sa)) == ANET_ERR)
        return ANET_ERR;
    return s;
}

int anetUnixServer(char *err, char *path, mode_t perm)
{
    int s;
    struct sockaddr_un sa;

    if ((s = anetCreateSocket(err,AF_LOCAL)) == ANET_ERR)
        return ANET_ERR;

    memset(&sa,0,sizeof(sa));
    sa.sun_family = AF_LOCAL;
    strncpy(sa.sun_path,path,sizeof(sa.sun_path)-1);
    if (anetListen(err,s,(struct sockaddr*)&sa,sizeof(sa)) == ANET_ERR)
        return ANET_ERR;
    if (perm)
        chmod(sa.sun_path, perm);
    return s;
}

static int anetGenericAccept(char *err, int s, struct sockaddr *sa, socklen_t *len) {
    int fd;
    while(1) {
        fd = accept(s,sa,len);
        if (fd == -1) {
            if (errno == EINTR)
                continue;
            else {
                anetSetError(err, "accept: %s", strerror(errno));
                return ANET_ERR;
            }
        }
        break;
    }
    return fd;
}

int anetTcpAccept(char *err, int s, char *ip, int *port) {
    int fd;
    struct sockaddr_in sa;
    socklen_t salen = sizeof(sa);
    if ((fd = anetGenericAccept(err,s,(struct sockaddr*)&sa,&salen)) == ANET_ERR)
        return ANET_ERR;

    if (ip) strcpy(ip,inet_ntoa(sa.sin_addr));
    if (port) *port = ntohs(sa.sin_port);
    return fd;
}

int anetUnixAccept(char *err, int s) {
    int fd;
    struct sockaddr_un sa;
    socklen_t salen = sizeof(sa);
    if ((fd = anetGenericAccept(err,s,(struct sockaddr*)&sa,&salen)) == ANET_ERR)
        return ANET_ERR;

    return fd;
}

int anetPeerToString(int fd, char *ip, int *port) {
    struct sockaddr_in sa;
    socklen_t salen = sizeof(sa);

    if (getpeername(fd,(struct sockaddr*)&sa,&salen) == -1) {
        *port = 0;
        ip[0] = '?';
        ip[1] = '\0';
        return -1;
    }
    if (ip) strcpy(ip,inet_ntoa(sa.sin_addr));
    if (port) *port = ntohs(sa.sin_port);
    return 0;
}

int anetSockName(int fd, char *ip, int *port) {
    struct sockaddr_in sa;
    socklen_t salen = sizeof(sa);

    if (getsockname(fd,(struct sockaddr*)&sa,&salen) == -1) {
        *port = 0;
        ip[0] = '?';
        ip[1] = '\0';
        return -1;
    }
    if (ip) strcpy(ip,inet_ntoa(sa.sin_addr));
    if (port) *port = ntohs(sa.sin_port);
    return 0;
}
Commit	Line	Data
ed9b544e	1	/* anet.c -- Basic TCP socket stuff made a bit less boring
ed9b544e	2	*
d288ee65	3	* Copyright (c) 2006-2012, Salvatore Sanfilippo <antirez at gmail dot com>
ed9b544e	4	* All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions are met:
	8	*
	9	* * Redistributions of source code must retain the above copyright notice,
	10	* this list of conditions and the following disclaimer.
	11	* * Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	* * Neither the name of Redis nor the names of its contributors may be used
	15	* to endorse or promote products derived from this software without
	16	* specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	19	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	21	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	22	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	23	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	24	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	25	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	26	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	27	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	28	* POSSIBILITY OF SUCH DAMAGE.
	29	*/
	30
23d4709d	31	#include "fmacros.h"
23d4709d	32
ed9b544e	33	#include <sys/types.h>
ed9b544e	34	#include <sys/socket.h>
85238765	35	#include <sys/stat.h>
c61e6925	36	#include <sys/un.h>
ed9b544e	37	#include <netinet/in.h>
	38	#include <netinet/tcp.h>
	39	#include <arpa/inet.h>
	40	#include <unistd.h>
	41	#include <fcntl.h>
	42	#include <string.h>
	43	#include <netdb.h>
	44	#include <errno.h>
	45	#include <stdarg.h>
	46	#include <stdio.h>
	47
	48	#include "anet.h"
	49
	50	static void anetSetError(char err, const char fmt, ...)
	51	{
	52	va_list ap;
	53
	54	if (!err) return;
	55	va_start(ap, fmt);
	56	vsnprintf(err, ANET_ERR_LEN, fmt, ap);
	57	va_end(ap);
	58	}
	59
	60	int anetNonBlock(char *err, int fd)
	61	{
	62	int flags;
	63
	64	/* Set the socket nonblocking.
	65	* Note that fcntl(2) for F_GETFL and F_SETFL can't be
	66	* interrupted by a signal. */
	67	if ((flags = fcntl(fd, F_GETFL)) == -1) {
9b1d738f	68	anetSetError(err, "fcntl(F_GETFL): %s", strerror(errno));
ed9b544e	69	return ANET_ERR;
	70	}
	71	if (fcntl(fd, F_SETFL, flags \| O_NONBLOCK) == -1) {
9b1d738f	72	anetSetError(err, "fcntl(F_SETFL,O_NONBLOCK): %s", strerror(errno));
ed9b544e	73	return ANET_ERR;
	74	}
	75	return ANET_OK;
	76	}
	77
	78	int anetTcpNoDelay(char *err, int fd)
	79	{
	80	int yes = 1;
	81	if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes)) == -1)
	82	{
9b1d738f	83	anetSetError(err, "setsockopt TCP_NODELAY: %s", strerror(errno));
ed9b544e	84	return ANET_ERR;
	85	}
	86	return ANET_OK;
	87	}
	88
	89	int anetSetSendBuffer(char *err, int fd, int buffsize)
	90	{
	91	if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &buffsize, sizeof(buffsize)) == -1)
	92	{
9b1d738f	93	anetSetError(err, "setsockopt SO_SNDBUF: %s", strerror(errno));
ed9b544e	94	return ANET_ERR;
	95	}
	96	return ANET_OK;
	97	}
	98
	99	int anetTcpKeepAlive(char *err, int fd)
	100	{
	101	int yes = 1;
	102	if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) == -1) {
9b1d738f	103	anetSetError(err, "setsockopt SO_KEEPALIVE: %s", strerror(errno));
ed9b544e	104	return ANET_ERR;
	105	}
	106	return ANET_OK;
	107	}
	108
	109	int anetResolve(char err, char host, char *ipbuf)
	110	{
	111	struct sockaddr_in sa;
	112
	113	sa.sin_family = AF_INET;
	114	if (inet_aton(host, &sa.sin_addr) == 0) {
	115	struct hostent *he;
	116
	117	he = gethostbyname(host);
	118	if (he == NULL) {
9b1d738f	119	anetSetError(err, "can't resolve: %s", host);
ed9b544e	120	return ANET_ERR;
	121	}
	122	memcpy(&sa.sin_addr, he->h_addr, sizeof(struct in_addr));
	123	}
	124	strcpy(ipbuf,inet_ntoa(sa.sin_addr));
	125	return ANET_OK;
	126	}
	127
704bd093 PN	128	static int anetCreateSocket(char *err, int domain) {
	129	int s, on = 1;
	130	if ((s = socket(domain, SOCK_STREAM, 0)) == -1) {
9b1d738f	131	anetSetError(err, "creating socket: %s", strerror(errno));
704bd093 PN	132	return ANET_ERR;
	133	}
	134
	135	/* Make sure connection-intensive things like the redis benckmark
	136	* will be able to close/open sockets a zillion of times */
	137	if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
9b1d738f	138	anetSetError(err, "setsockopt SO_REUSEADDR: %s", strerror(errno));
704bd093 PN	139	return ANET_ERR;
	140	}
	141	return s;
	142	}
	143
ed9b544e	144	#define ANET_CONNECT_NONE 0
	145	#define ANET_CONNECT_NONBLOCK 1
	146	static int anetTcpGenericConnect(char err, char addr, int port, int flags)
	147	{
704bd093	148	int s;
ed9b544e	149	struct sockaddr_in sa;
ed9b544e	150
704bd093	151	if ((s = anetCreateSocket(err,AF_INET)) == ANET_ERR)
ed9b544e	152	return ANET_ERR;
ed9b544e	153
	154	sa.sin_family = AF_INET;
	155	sa.sin_port = htons(port);
	156	if (inet_aton(addr, &sa.sin_addr) == 0) {
	157	struct hostent *he;
	158
	159	he = gethostbyname(addr);
	160	if (he == NULL) {
9b1d738f	161	anetSetError(err, "can't resolve: %s", addr);
ed9b544e	162	close(s);
	163	return ANET_ERR;
	164	}
	165	memcpy(&sa.sin_addr, he->h_addr, sizeof(struct in_addr));
	166	}
	167	if (flags & ANET_CONNECT_NONBLOCK) {
	168	if (anetNonBlock(err,s) != ANET_OK)
	169	return ANET_ERR;
	170	}
	171	if (connect(s, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
	172	if (errno == EINPROGRESS &&
	173	flags & ANET_CONNECT_NONBLOCK)
	174	return s;
	175
9b1d738f	176	anetSetError(err, "connect: %s", strerror(errno));
ed9b544e	177	close(s);
	178	return ANET_ERR;
	179	}
	180	return s;
	181	}
	182
	183	int anetTcpConnect(char err, char addr, int port)
	184	{
	185	return anetTcpGenericConnect(err,addr,port,ANET_CONNECT_NONE);
	186	}
	187
	188	int anetTcpNonBlockConnect(char err, char addr, int port)
	189	{
	190	return anetTcpGenericConnect(err,addr,port,ANET_CONNECT_NONBLOCK);
	191	}
	192
c61e6925 PN	193	int anetUnixGenericConnect(char err, char path, int flags)
	194	{
	195	int s;
	196	struct sockaddr_un sa;
	197
704bd093	198	if ((s = anetCreateSocket(err,AF_LOCAL)) == ANET_ERR)
c61e6925	199	return ANET_ERR;
704bd093	200
c61e6925 PN	201	sa.sun_family = AF_LOCAL;
	202	strncpy(sa.sun_path,path,sizeof(sa.sun_path)-1);
	203	if (flags & ANET_CONNECT_NONBLOCK) {
	204	if (anetNonBlock(err,s) != ANET_OK)
	205	return ANET_ERR;
	206	}
	207	if (connect(s,(struct sockaddr*)&sa,sizeof(sa)) == -1) {
	208	if (errno == EINPROGRESS &&
	209	flags & ANET_CONNECT_NONBLOCK)
	210	return s;
	211
9b1d738f	212	anetSetError(err, "connect: %s", strerror(errno));
c61e6925 PN	213	close(s);
	214	return ANET_ERR;
	215	}
	216	return s;
	217	}
	218
	219	int anetUnixConnect(char err, char path)
	220	{
	221	return anetUnixGenericConnect(err,path,ANET_CONNECT_NONE);
	222	}
	223
	224	int anetUnixNonBlockConnect(char err, char path)
	225	{
	226	return anetUnixGenericConnect(err,path,ANET_CONNECT_NONBLOCK);
	227	}
	228
ed9b544e	229	/* Like read(2) but make sure 'count' is read before to return
ed9b544e	230	* (unless error or EOF condition is encountered) */
a4d1ba9a	231	int anetRead(int fd, char *buf, int count)
ed9b544e	232	{
	233	int nread, totlen = 0;
	234	while(totlen != count) {
	235	nread = read(fd,buf,count-totlen);
	236	if (nread == 0) return totlen;
	237	if (nread == -1) return -1;
	238	totlen += nread;
	239	buf += nread;
	240	}
	241	return totlen;
	242	}
	243
	244	/* Like write(2) but make sure 'count' is read before to return
	245	* (unless error is encountered) */
a4d1ba9a	246	int anetWrite(int fd, char *buf, int count)
ed9b544e	247	{
	248	int nwritten, totlen = 0;
	249	while(totlen != count) {
	250	nwritten = write(fd,buf,count-totlen);
	251	if (nwritten == 0) return totlen;
	252	if (nwritten == -1) return -1;
	253	totlen += nwritten;
	254	buf += nwritten;
	255	}
	256	return totlen;
	257	}
	258
704bd093 PN	259	static int anetListen(char err, int s, struct sockaddr sa, socklen_t len) {
704bd093 PN	260	if (bind(s,sa,len) == -1) {
9b1d738f	261	anetSetError(err, "bind: %s", strerror(errno));
704bd093	262	close(s);
ed9b544e	263	return ANET_ERR;
ed9b544e	264	}
b9cd703b ED	265
	266	/* Use a backlog of 512 entries. We pass 511 to the listen() call because
	267	* the kernel does: backlogsize = roundup_pow_of_two(backlogsize + 1);
	268	* which will thus give us a backlog of 512 entries */
	269	if (listen(s, 511) == -1) {
9b1d738f	270	anetSetError(err, "listen: %s", strerror(errno));
ed9b544e	271	close(s);
	272	return ANET_ERR;
	273	}
704bd093 PN	274	return ANET_OK;
	275	}
	276
	277	int anetTcpServer(char err, int port, char bindaddr)
	278	{
	279	int s;
	280	struct sockaddr_in sa;
	281
	282	if ((s = anetCreateSocket(err,AF_INET)) == ANET_ERR)
	283	return ANET_ERR;
	284
ed9b544e	285	memset(&sa,0,sizeof(sa));
	286	sa.sin_family = AF_INET;
	287	sa.sin_port = htons(port);
	288	sa.sin_addr.s_addr = htonl(INADDR_ANY);
704bd093	289	if (bindaddr && inet_aton(bindaddr, &sa.sin_addr) == 0) {
9b1d738f	290	anetSetError(err, "invalid bind address");
ed9b544e	291	close(s);
	292	return ANET_ERR;
	293	}
704bd093	294	if (anetListen(err,s,(struct sockaddr*)&sa,sizeof(sa)) == ANET_ERR)
ed9b544e	295	return ANET_ERR;
ed9b544e	296	return s;
	297	}
	298
85238765	299	int anetUnixServer(char err, char path, mode_t perm)
c61e6925 PN	300	{
	301	int s;
	302	struct sockaddr_un sa;
	303
704bd093	304	if ((s = anetCreateSocket(err,AF_LOCAL)) == ANET_ERR)
c61e6925	305	return ANET_ERR;
704bd093	306
c61e6925 PN	307	memset(&sa,0,sizeof(sa));
	308	sa.sun_family = AF_LOCAL;
	309	strncpy(sa.sun_path,path,sizeof(sa.sun_path)-1);
704bd093	310	if (anetListen(err,s,(struct sockaddr*)&sa,sizeof(sa)) == ANET_ERR)
c61e6925	311	return ANET_ERR;
85238765 NF	312	if (perm)
85238765 NF	313	chmod(sa.sun_path, perm);
c61e6925 PN	314	return s;
	315	}
	316
ab17b909	317	static int anetGenericAccept(char err, int s, struct sockaddr sa, socklen_t *len) {
ed9b544e	318	int fd;
ed9b544e	319	while(1) {
ab17b909	320	fd = accept(s,sa,len);
ed9b544e	321	if (fd == -1) {
	322	if (errno == EINTR)
	323	continue;
	324	else {
9b1d738f	325	anetSetError(err, "accept: %s", strerror(errno));
ed9b544e	326	return ANET_ERR;
	327	}
	328	}
	329	break;
	330	}
ab17b909 PN	331	return fd;
	332	}
	333
	334	int anetTcpAccept(char err, int s, char ip, int *port) {
	335	int fd;
	336	struct sockaddr_in sa;
	337	socklen_t salen = sizeof(sa);
	338	if ((fd = anetGenericAccept(err,s,(struct sockaddr*)&sa,&salen)) == ANET_ERR)
	339	return ANET_ERR;
	340
ed9b544e	341	if (ip) strcpy(ip,inet_ntoa(sa.sin_addr));
	342	if (port) *port = ntohs(sa.sin_port);
	343	return fd;
	344	}
ab17b909	345
4fe83b55	346	int anetUnixAccept(char *err, int s) {
ab17b909 PN	347	int fd;
	348	struct sockaddr_un sa;
	349	socklen_t salen = sizeof(sa);
	350	if ((fd = anetGenericAccept(err,s,(struct sockaddr*)&sa,&salen)) == ANET_ERR)
	351	return ANET_ERR;
	352
ab17b909 PN	353	return fd;
ab17b909 PN	354	}
3cd12b56	355
	356	int anetPeerToString(int fd, char ip, int port) {
	357	struct sockaddr_in sa;
	358	socklen_t salen = sizeof(sa);
	359
7b845b62	360	if (getpeername(fd,(struct sockaddr*)&sa,&salen) == -1) {
	361	*port = 0;
	362	ip[0] = '?';
	363	ip[1] = '\0';
	364	return -1;
	365	}
3cd12b56	366	if (ip) strcpy(ip,inet_ntoa(sa.sin_addr));
	367	if (port) *port = ntohs(sa.sin_port);
	368	return 0;
	369	}
120ba392	370
	371	int anetSockName(int fd, char ip, int port) {
	372	struct sockaddr_in sa;
	373	socklen_t salen = sizeof(sa);
	374
	375	if (getsockname(fd,(struct sockaddr*)&sa,&salen) == -1) {
	376	*port = 0;
	377	ip[0] = '?';
	378	ip[1] = '\0';
	379	return -1;
	380	}
	381	if (ip) strcpy(ip,inet_ntoa(sa.sin_addr));
	382	if (port) *port = ntohs(sa.sin_port);
	383	return 0;
	384	}