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/* $Id$ */
#include <sys/types.h>
#include "gpsd_config.h"
#ifdef HAVE_SYS_SOCKET_H
#ifndef S_SPLINT_S
#include <sys/socket.h>
#endif /* S_SPLINT_S */
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN_SYSTM_H
#include <netinet/in_systm.h>
#endif
#ifndef S_SPLINT_S
#ifdef HAVE_NETINET_IN_H
#include <netinet/ip.h>
#endif /* S_SPLINT_S */
#endif
#include <netdb.h>
#include <arpa/inet.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "gpsd.h"
#if !defined (INADDR_NONE)
#define INADDR_NONE ((in_addr_t)-1)
#endif
int netlib_connectsock(const char *host, const char *service, const char *protocol)
{
struct hostent *phe;
struct servent *pse;
struct protoent *ppe;
struct sockaddr_in sin;
int s, type, proto, one = 1;
memset((char *) &sin, 0, sizeof(sin));
/*@ -type -mustfreefresh @*/
sin.sin_family = AF_INET;
if ((pse = getservbyname(service, protocol)))
sin.sin_port = htons(ntohs((unsigned short) pse->s_port));
else if ((sin.sin_port = htons((unsigned short) atoi(service))) == 0)
return NL_NOSERVICE;
if ((phe = gethostbyname(host)))
memcpy((char *) &sin.sin_addr, phe->h_addr, phe->h_length);
else if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE)
return NL_NOHOST;
ppe = getprotobyname(protocol);
if (strcmp(protocol, "udp") == 0) {
type = SOCK_DGRAM;
proto = (ppe) ? ppe->p_proto : IPPROTO_UDP;
} else {
type = SOCK_STREAM;
proto = (ppe) ? ppe->p_proto : IPPROTO_TCP;
}
if ((s = socket(PF_INET, type, proto)) == -1)
return NL_NOSOCK;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one))==-1) {
(void)close(s);
return NL_NOSOCKOPT;
}
if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) == -1) {
(void)close(s);
return NL_NOCONNECT;
}
#ifdef IPTOS_LOWDELAY
{
int opt = IPTOS_LOWDELAY;
/*@ -unrecog @*/
(void)setsockopt(s, IPPROTO_IP, IP_TOS, &opt, sizeof opt);
/*@ +unrecog @*/
}
#endif
#ifdef TCP_NODELAY
if (type == SOCK_STREAM)
setsockopt(s, IPPROTO_TCP, TCP_NODELAY, &one, sizeof one);
#endif
return s;
/*@ +type +mustfreefresh @*/
}
char /*@observer@*/ *netlib_errstr(const int err)
{
switch (err) {
case NL_NOSERVICE: return "can't get service entry";
case NL_NOHOST: return "can't get host entry";
case NL_NOPROTO: return "can't get protocol entry";
case NL_NOSOCK: return "can't create socket";
case NL_NOSOCKOPT: return "error SETSOCKOPT SO_REUSEADDR";
case NL_NOCONNECT: return "can't connect to host/port pair";
default: return "unknown error";
}
}
char *sock2ip(int fd)
{
struct sockaddr fsin;
socklen_t alen = (socklen_t)sizeof(fsin);
char *ip;
int r;
r = getpeername(fd, (struct sockaddr *) &fsin, &alen);
/*@ -branchstate @*/
if (r == 0){
ip = inet_ntoa(((struct sockaddr_in *)(&fsin))->sin_addr);
} else {
gpsd_report(LOG_INF, "getpeername() = %d, error = %s (%d)\n", r, strerror(errno), errno);
ip = "<unknown>";
}
/*@ +branchstate @*/
return ip;
}
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