int getaddrinfo(const char *hostname, const char *servname, const struct addrinfo *hints, struct addrinfo **res) {
struct addrinfo *prev = NULL;
struct hostent *hp;
struct in_addr in = {0};
int i;
uint16_t port = 0;
if(hints && hints->ai_family != AF_INET && hints->ai_family != AF_UNSPEC)
return EAI_FAMILY;
if (servname)
port = htons(atoi(servname));
if (hints && hints->ai_flags & AI_PASSIVE) {
*res = malloc_ai(port, htonl(0x00000000));
return 0;
}
if (!hostname) {
*res = malloc_ai(port, htonl(0x7f000001));
return 0;
}
hp = gethostbyname(hostname);
if(!hp || !hp->h_addr_list || !hp->h_addr_list[0])
return EAI_NODATA;
for (i = 0; hp->h_addr_list[i]; i++) {
*res = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr);
if(prev)
prev->ai_next = *res;
prev = *res;
}
return 0;
}
int
getaddrinfo(const char *hostname, const char *servname,
const struct addrinfo *hints, struct addrinfo **res)
{
struct hostent *hp;
struct servent *sp;
struct in_addr in;
int i;
long int port;
u_long addr;
port = 0;
if (servname != NULL) {
char *cp;
port = strtol(servname, &cp, 10);
if (port > 0 && port <= 65535 && *cp == '\0')
port = htons(port);
else if ((sp = getservbyname(servname, NULL)) != NULL)
port = sp->s_port;
else
port = 0;
}
if (hints && hints->ai_flags & AI_PASSIVE) {
addr = htonl(0x00000000);
if (hostname && inet_aton(hostname, &in) != 0)
addr = in.s_addr;
*res = malloc_ai(port, addr, hints);
if (*res == NULL)
return (EAI_MEMORY);
return (0);
}
if (!hostname) {
*res = malloc_ai(port, htonl(0x7f000001), hints);
if (*res == NULL)
return (EAI_MEMORY);
return (0);
}
if (inet_aton(hostname, &in)) {
*res = malloc_ai(port, in.s_addr, hints);
if (*res == NULL)
return (EAI_MEMORY);
return (0);
}
/* Don't try DNS if AI_NUMERICHOST is set */
if (hints && hints->ai_flags & AI_NUMERICHOST)
return (EAI_NONAME);
hp = gethostbyname(hostname);
if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
struct addrinfo *cur, *prev;
cur = prev = *res = NULL;
for (i = 0; hp->h_addr_list[i]; i++) {
struct in_addr *in = (struct in_addr *)hp->h_addr_list[i];
cur = malloc_ai(port, in->s_addr, hints);
if (cur == NULL) {
if (*res != NULL)
freeaddrinfo(*res);
return (EAI_MEMORY);
}
if (prev)
prev->ai_next = cur;
else
*res = cur;
prev = cur;
}
return (0);
}
return (EAI_NODATA);
}
int
getaddrinfo(const char *hostname, const char *servname,
const struct addrinfo *hints, struct addrinfo **res)
{
struct addrinfo *cur, *prev = NULL;
struct hostent *hp;
struct in_addr in;
int i, port = 0, socktype, proto;
if (hints && hints->ai_family != PF_INET && hints->ai_family != PF_UNSPEC)
return EAI_FAMILY;
socktype = (hints && hints->ai_socktype) ? hints->ai_socktype
: SOCK_STREAM;
if (hints && hints->ai_protocol)
proto = hints->ai_protocol;
else {
switch (socktype) {
case SOCK_DGRAM:
proto = IPPROTO_UDP;
break;
case SOCK_STREAM:
proto = IPPROTO_TCP;
break;
default:
proto = 0;
break;
}
}
if (servname) {
if (isdigit((int)*servname))
port = htons(atoi(servname));
else {
struct servent *se;
char *pe_proto;
if (hints && hints->ai_flags & AI_NUMERICSERV)
return EAI_NONAME;
switch (socktype) {
case SOCK_DGRAM:
pe_proto = "udp";
break;
case SOCK_STREAM:
pe_proto = "tcp";
break;
default:
pe_proto = NULL;
break;
}
if ((se = getservbyname(servname, pe_proto)) == NULL)
return EAI_SERVICE;
port = se->s_port;
}
}
if (!hostname) {
if (hints && hints->ai_flags & AI_PASSIVE)
*res = malloc_ai(port, htonl(0x00000000), socktype, proto);
else
*res = malloc_ai(port, htonl(0x7f000001), socktype, proto);
if (*res)
return 0;
else
return EAI_MEMORY;
}
if (inet_aton(hostname, &in)) {
*res = malloc_ai(port, in.s_addr, socktype, proto);
if (*res)
return 0;
else
return EAI_MEMORY;
}
if (hints && hints->ai_flags & AI_NUMERICHOST)
return EAI_NONAME;
if ((hp = gethostbyname(hostname)) &&
hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
for (i = 0; hp->h_addr_list[i]; i++) {
if ((cur = malloc_ai(port,
((struct in_addr *)hp->h_addr_list[i])->s_addr,
socktype, proto)) == NULL) {
if (*res)
freeaddrinfo(*res);
return EAI_MEMORY;
}
if (prev)
prev->ai_next = cur;
else
*res = cur;
prev = cur;
}
if (hints && hints->ai_flags & AI_CANONNAME && *res) {
if (((*res)->ai_canonname = strdup(hp->h_name)) == NULL) {
freeaddrinfo(*res);
return EAI_MEMORY;
}
}
return 0;
}
return EAI_NONAME;
}
int
getaddrinfo(char const *hostname, char const *servname,
struct addrinfo const *hints, struct addrinfo **res)
{
struct addrinfo *cur, *prev = NULL;
struct hostent *hp;
struct hostent result;
struct in_addr in;
int i, socktype, proto;
uint16_t port = 0;
int error;
char buffer[2048];
if (hints && hints->ai_family != PF_INET && hints->ai_family != PF_UNSPEC)
return EAI_FAMILY;
socktype = (hints && hints->ai_socktype) ? hints->ai_socktype
: SOCK_STREAM;
if (hints && hints->ai_protocol)
proto = hints->ai_protocol;
else {
switch (socktype) {
case SOCK_DGRAM:
proto = IPPROTO_UDP;
break;
case SOCK_STREAM:
proto = IPPROTO_TCP;
break;
default:
proto = 0;
break;
}
}
if (servname) {
if (isdigit((int)*servname))
port = htons(atoi(servname));
else {
struct servent *se;
char const *pe_proto;
switch (socktype) {
case SOCK_DGRAM:
pe_proto = "udp";
break;
case SOCK_STREAM:
pe_proto = "tcp";
break;
default:
pe_proto = NULL;
break;
}
if ((se = getservbyname(servname, pe_proto)) == NULL)
return EAI_SERVICE;
port = se->s_port;
}
}
if (!hostname) {
if (hints && hints->ai_flags & AI_PASSIVE)
*res = malloc_ai(port, htonl(0x00000000), socktype, proto);
else
*res = malloc_ai(port, htonl(0x7f000001), socktype, proto);
if (*res)
return 0;
else
return EAI_MEMORY;
}
/* Numeric IP Address */
if (inet_aton(hostname, &in)) {
*res = malloc_ai(port, in.s_addr, socktype, proto);
if (*res)
return 0;
else
return EAI_MEMORY;
}
if (hints && hints->ai_flags & AI_NUMERICHOST)
return EAI_NONAME;
/* DNS Lookup */
#ifdef GETHOSTBYNAMERSTYLE
#if GETHOSTBYNAMERSTYLE == SYSVSTYLE
hp = gethostbyname_r(hostname, &result, buffer, sizeof(buffer), &error);
#elif GETHOSTBYNAMERSTYLE == GNUSTYLE
if (gethostbyname_r(hostname, &result, buffer,
sizeof(buffer), &hp, &error) != 0) {
hp = NULL;
}
#else
hp = gethostbyname_r(hostname, &result, buffer, sizeof(buffer), &error);
#endif
#else
hp = gethostbyname_r(hostname, &result, buffer, sizeof(buffer), &error);
#endif
if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
for (i = 0; hp->h_addr_list[i]; i++) {
if ((cur = malloc_ai(port,
((struct in_addr *)hp->h_addr_list[i])->s_addr,
socktype, proto)) == NULL) {
if (*res)
freeaddrinfo(*res);
return EAI_MEMORY;
}
if (prev)
prev->ai_next = cur;
else
*res = cur;
prev = cur;
}
if (hints && hints->ai_flags & AI_CANONNAME && *res) {
if (((*res)->ai_canonname = strdup(hp->h_name)) == NULL) {
freeaddrinfo(*res);
return EAI_MEMORY;
}
}
return 0;
}
return EAI_NONAME;
}
int getaddrinfo(const char *hostname, const char *servname,
const struct addrinfo *hints, struct addrinfo **res)
{
struct addrinfo *cur, *prev = NULL;
struct hostent *hp;
struct in_addr in;
int i, port;
if (servname)
port = htons(atoi(servname));
else
port = 0;
if (hints != NULL && hints->ai_flags & AI_PASSIVE) {
*res = malloc_ai(port, htonl(0x00000000));
if (*res != NULL)
return (0);
else
return (EAI_MEMORY);
}
if (hostname == NULL) {
*res = malloc_ai(port, htonl(0x7f000001));
if (*res != NULL)
return (0);
else
return (EAI_MEMORY);
}
if (inet_aton(hostname, &in) != 0) {
*res = malloc_ai(port, in.s_addr);
if (*res != NULL)
return (0);
else
return (EAI_MEMORY);
}
hp = gethostbyname(hostname);
if (hp != NULL && hp->h_name != NULL && hp->h_name[0] != 0 &&
hp->h_addr_list[0] != NULL)
{
for (i = 0 ; hp->h_addr_list[i] ; i++) {
cur = malloc_ai(port,
((struct in_addr *) hp->h_addr_list[i])->s_addr);
if (cur == NULL) {
if (*res != NULL)
freeaddrinfo(*res);
return (EAI_MEMORY);
}
if (prev != NULL)
prev->ai_next = cur;
else
*res = cur;
prev = cur;
}
return (0);
}
return (EAI_NODATA);
}
