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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "ump-gai.h"
#include "ump-common.h"
#include "xwrap.h"
#include "l4logger.h"
#include <arpa/inet.h>
#include <errno.h>
#include <inttypes.h>
#include <netdb.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
int ump_gai (LbsLogger* lbs_log, const char* host, const char* port,
bool try_bind, struct sockaddr_storage* addr, socklen_t* addr_len,
int *error) {
lbs_logger_format (lbs_log, "getaddrinfo: host %s, port %s",host, port);
struct addrinfo hints;
memset (&hints, 0, sizeof (hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_ADDRCONFIG;
struct addrinfo* result;
int gai_errno = getaddrinfo (host, port, &hints, &result);
if (gai_errno != 0) {
lbs_logger_format (lbs_log, "getaddrinfo: %s", gai_strerror (gai_errno));
*error = gai_errno;
return -1;
}
for (struct addrinfo* iter = result; iter != NULL; iter = iter->ai_next) {
int sockfd;
if (try_bind) {
sockfd = socket (iter->ai_family, SOCK_DGRAM, 0);
if (sockfd < 0) {
freeaddrinfo (result);
lbs_logger_format (lbs_log, "socket: %s", strerror (errno));
*error = 0;
return -1;
}
}
if (iter->ai_family == AF_INET6) {
lbs_logger_string (lbs_log, "host address is IPv6");
if (addr != NULL) {
memcpy (addr, iter->ai_addr, sizeof (struct sockaddr_in6));
}
if (addr_len != NULL) {
*addr_len = iter->ai_addrlen;
}
} else {
lbs_logger_string (lbs_log, "host address is IPv4");
if (addr != NULL) {
memcpy (addr, iter->ai_addr, sizeof (struct sockaddr_in));
}
if (addr_len != NULL) {
*addr_len = iter->ai_addrlen;
}
}
size_t ip_str_len = xmax (INET_ADDRSTRLEN, INET6_ADDRSTRLEN);
char* ip_str = xmalloc (ip_str_len);
uint16_t udp_port = ntohs (
iter->ai_family == AF_INET6 ?
SOCKADDR_IN6 (iter->ai_addr)->sin6_port :
SOCKADDR_IN (iter->ai_addr)->sin_port);
if (inet_ntop (iter->ai_family,
iter->ai_family == AF_INET6 ?
(void*) &SOCKADDR_IN6 (iter->ai_addr)->sin6_addr :
(void*) &SOCKADDR_IN (iter->ai_addr)->sin_addr,
ip_str, ip_str_len) == NULL) {
lbs_logger_format (lbs_log,
"unknown host, port %" PRIu16, udp_port);
} else {
lbs_logger_format (lbs_log,
"host %s, port %" PRIu16, ip_str, udp_port);
}
free (ip_str);
if (try_bind && bind (sockfd, iter->ai_addr, iter->ai_addrlen) < 0) {
lbs_logger_format (lbs_log, "bind: %s", strerror (errno));
close (sockfd);
} else {
freeaddrinfo (result);
if (try_bind) {
lbs_logger_string (lbs_log, "bind OK");
return sockfd;
} else {
return 0;
}
}
}
if (result != NULL) {
freeaddrinfo (result);
}
*error = 0;
return -1;
}
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