int rvnamedactive(void)
{
int fd;
fd_set sockset;
struct rvn rpkt;
struct sockaddr_un su;
int sstat;
struct timeval tv;
socklen_t fr;
int br;
char unix_socket[80];
strncpy(unix_socket, get_path(T_WORKDIR, gen_unix_sockname()), 80);
unlink(unix_socket);
fd = socket(PF_UNIX, SOCK_DGRAM, 0);
su.sun_family = AF_UNIX;
strcpy(su.sun_path, unix_socket);
bind(fd, (struct sockaddr *) &su,
sizeof(su.sun_family) + strlen(su.sun_path));
su.sun_family = AF_UNIX;
strcpy(su.sun_path, IPTSOCKNAME);
rpkt.type = RVN_HELLO;
sendto(fd, &rpkt, sizeof(struct rvn), 0, (struct sockaddr *) &su,
sizeof(su.sun_family) + strlen(su.sun_path));
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO(&sockset);
FD_SET(fd, &sockset);
do {
sstat = select(fd + 1, &sockset, NULL, NULL, &tv);
} while ((sstat < 0) && (errno != ENOMEM) && (errno == EINTR));
if (sstat == 1) {
fr = sizeof(su.sun_family) + strlen(su.sun_path);
do {
br = recvfrom(fd, &rpkt, sizeof(struct rvn), 0,
(struct sockaddr *) &su, &fr);
} while ((br < 0) && (errno == EINTR));
if (br < 0)
printipcerr();
}
close(fd);
unlink(unix_socket);
if (sstat == 0)
return 0;
else
return 1;
}
int revname(int *lookup, struct sockaddr_storage *addr,
char *target, size_t target_size, int rvnfd)
{
struct rvn rpkt;
int br;
struct sockaddr_un su;
socklen_t fl;
fd_set sockset;
struct timeval tv;
int sstat = 0;
memset(target, 0, target_size);
if (*lookup) {
if (rvnfd > 0) {
su.sun_family = AF_UNIX;
strcpy(su.sun_path, IPTSOCKNAME);
rpkt.type = RVN_REQUEST;
sockaddr_copy(&rpkt.addr, addr);
sendto(rvnfd, &rpkt, sizeof(struct rvn), 0,
(struct sockaddr *) &su,
sizeof(su.sun_family) + strlen(su.sun_path));
fl = sizeof(su.sun_family) + strlen(su.sun_path);
do {
tv.tv_sec = 10;
tv.tv_usec = 0;
FD_ZERO(&sockset);
FD_SET(rvnfd, &sockset);
do {
sstat =
select(rvnfd + 1, &sockset, NULL,
NULL, &tv);
} while ((sstat < 0) && (errno == EINTR));
if (FD_ISSET(rvnfd, &sockset))
br = recvfrom(rvnfd, &rpkt,
sizeof(struct rvn), 0,
(struct sockaddr *) &su,
&fl);
else
br = -1;
} while ((br < 0) && (errno == EINTR));
if (br < 0) {
sockaddr_ntop(addr, target, target_size);
printipcerr();
*lookup = 0;
return RESOLVED;
}
strncpy(target, rpkt.fqdn, target_size - 1);
return (rpkt.ready);
} else {
struct hostent *he = sockaddr_gethostbyaddr(addr);
if (he == NULL) {
sockaddr_ntop(addr, target, target_size);
} else {
strncpy(target, he->h_name, target_size - 1);
}
return RESOLVED;
}
} else {
sockaddr_ntop(addr, target, target_size);
return RESOLVED;
}
return NOTRESOLVED;
}
int revname(int *lookup, struct in_addr *saddr, struct in6_addr *s6addr,
char *target, int rvnfd)
{
struct hostent *he;
struct rvn rpkt;
int br;
struct sockaddr_un su;
socklen_t fl;
fd_set sockset;
struct timeval tv;
int sstat = 0;
memset(target, 0, 45);
if (*lookup) {
if (rvnfd > 0) {
su.sun_family = AF_UNIX;
strcpy(su.sun_path, IPTSOCKNAME);
rpkt.type = RVN_REQUEST;
rpkt.saddr.s_addr = saddr->s_addr;
if (s6addr != NULL)
memcpy(rpkt.s6addr.s6_addr, s6addr->s6_addr,
16);
else
memset(rpkt.s6addr.s6_addr, 0, 4);
sendto(rvnfd, &rpkt, sizeof(struct rvn), 0,
(struct sockaddr *) &su,
sizeof(su.sun_family) + strlen(su.sun_path));
fl = sizeof(su.sun_family) + strlen(su.sun_path);
do {
tv.tv_sec = 10;
tv.tv_usec = 0;
FD_ZERO(&sockset);
FD_SET(rvnfd, &sockset);
do {
sstat =
select(rvnfd + 1, &sockset, NULL,
NULL, &tv);
} while ((sstat < 0) && (errno == EINTR));
if (FD_ISSET(rvnfd, &sockset))
br = recvfrom(rvnfd, &rpkt,
sizeof(struct rvn), 0,
(struct sockaddr *) &su,
&fl);
else
br = -1;
} while ((br < 0) && (errno == EINTR));
if (br < 0) {
if (saddr->s_addr != 0)
strcpy(target, inet_ntoa(*saddr));
else
inet_ntop(AF_INET6, s6addr, target, 44);
printipcerr();
*lookup = 0;
return RESOLVED;
}
strncpy(target, rpkt.fqdn, 44);
return (rpkt.ready);
} else {
if (saddr->s_addr != 0)
he = gethostbyaddr((char *) saddr,
sizeof(struct in_addr),
AF_INET);
else
he = gethostbyaddr((char *) s6addr,
sizeof(struct in6_addr),
AF_INET6);
if (he == NULL) {
if (saddr->s_addr != 0)
strcpy(target, inet_ntoa(*saddr));
else
inet_ntop(AF_INET6, s6addr, target, 44);
} else {
strncpy(target, he->h_name, 44);
}
return RESOLVED;
}
} else {
if (saddr->s_addr != 0 || s6addr == NULL)
strcpy(target, inet_ntoa(*saddr));
else
inet_ntop(AF_INET6, s6addr, target, 44);
return RESOLVED;
}
return NOTRESOLVED;
}
