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%% options
copyright owner = Dirk Krause
copyright year = 2016-xxxx
license = bsd
%% module
#include "dk4conf.h"
#include "dk4types.h"
#include "dk4mem.h"
#include "dk4sock.h"
#include "dk4mai8dus.h"
#include "dk4mao8d.h"
$!trace-include
/** Attempt to convert an IPv4 or IPv6 address from text to address.
@param dptr Destination variable.
@param str Source text.
@return 1 on success, 0 on error.
*/
static
int
dk4socket_c8_find_address(dk4_sockaddr_storage_t *dptr, const char *str)
{
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
struct sockaddr_in6 *in6;
#endif
struct sockaddr_in *in4;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
IN6_ADDR addr6;
#endif
IN_ADDR addr4;
int back = 0;
int res;
$? "+ dk4socket_c8_find_address"
res = dk4socket_c8_inet_pton(&addr4, sizeof(addr4), AF_INET, str, NULL);
if (DK4_SOCKET_RESULT_SUCCESS == res) { $? ". IPv4"
in4 = (struct sockaddr_in *)dptr;
in4->sin_family = AF_INET;
DK4_MEMCPY(&(in4->sin_addr), &addr4, sizeof(addr4));
back = 1;
} else {
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
res = dk4socket_c8_inet_pton(&addr6, sizeof(addr6), AF_INET6, str, NULL);
if (DK4_SOCKET_RESULT_SUCCESS == res) { $? ". IPv6"
in6 = (struct sockaddr_in6 *)dptr;
in6->sin6_family = AF_INET6;
DK4_MEMCPY(&(in6->sin6_addr), &addr6, sizeof(addr6));
back = 1;
}
#endif
}
$? "- dk4socket_c8_find_address %d", back
return back;
}
/** Find address for one host name.
@param dptr Address of destination data structure.
@param remhost Remote host name.
@param remport Remote port number in host representation.
@param ip4 Flag: Prefer IPv4 over IPv6 addresses.
@return 1 on success, 0 on error.
*/
static
int
dk4socket_c8_find_host(
dk4_sockaddr_storage_t *dptr,
const char *remhost,
unsigned short remport,
int ip4
)
{
#if DK4_HAVE_GETADDRINFO
char buf[16*sizeof(unsigned short)];
struct addrinfo hints;
struct addrinfo *results = NULL;
struct addrinfo *rptr = NULL;
int back = 0;
int res = 0;
$? "+ dk4socket_c8_find_host (getaddrinfo) \"%s\"", TR_8STR(remhost)
res = dk4ma_write_c8_decimal_unsigned(
buf, sizeof(buf), (dk4_um_t)remport, 0, NULL
);
if (0 != res) {
DK4_MEMRES(&hints, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = 0;
hints.ai_flags = AI_NUMERICSERV;
res = getaddrinfo(remhost, buf, &hints, &results);
if ((0 == res) && (NULL != results)) { $? ". getaddrinfo"
if (0 != ip4) { $? ". IPv4 preferred"
rptr = results;
while ((NULL != rptr) && (0 == back)) { $? ". entry"
if ((0 < rptr->ai_addrlen) && (NULL != rptr->ai_addr)) {
if (AF_INET == rptr->ai_addr->sa_family) {
if (sizeof(dk4_sockaddr_storage_t) >= rptr->ai_addrlen) {
DK4_MEMCPY(dptr, rptr->ai_addr, rptr->ai_addrlen);
back = 1; $? ". found"
} else { $? "! address too large"
}
} else { $? "! not IPv4"
}
} else { $? "! no address data"
}
rptr = rptr->ai_next;
}
if (0 == back) {
rptr = results;
while ((NULL != rptr) && (0 == back)) { $? ". entry"
if ((0 < rptr->ai_addrlen) && (NULL != rptr->ai_addr)) {
if (sizeof(dk4_sockaddr_storage_t) >= rptr->ai_addrlen) {
DK4_MEMCPY(dptr, rptr->ai_addr, rptr->ai_addrlen);
back = 1; $? ". found"
} else { $? "! address too large"
}
} else { $? "! no address data"
}
rptr = rptr->ai_next;
}
}
} else { $? ". any address family"
rptr = results;
while ((NULL != rptr) && (0 == back)) { $? ". entry"
if ((0 < rptr->ai_addrlen) && (NULL != rptr->ai_addr)) {
if (sizeof(dk4_sockaddr_storage_t) >= rptr->ai_addrlen) {
DK4_MEMCPY(dptr, rptr->ai_addr, rptr->ai_addrlen);
back = 1; $? ". found"
} else { $? "! address too large"
}
} else { $? "! no address data"
}
rptr = rptr->ai_next;
}
}
} else { $? "! getaddrinfo"
}
if (NULL != results) { freeaddrinfo(results); }
} else { $? "! failed to convert port no to text"
}
$? "- dk4socket_c8_find_host %d", back
return back;
#else
#if DK4_HAVE_GETHOSTBYNAME
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
struct sockaddr_in6 *sa6;
#endif
struct sockaddr_in *sa4;
struct hostent *hep = NULL;
int back = 0;
$? "+ dk4socket_c8_find_host (gethostbyname) \"%s\"", TR_8STR(remhost)
hep = gethostbyname(remhost);
if (NULL != hep) { $? ". entry"
if (NULL != hep->h_addr_list) { $? ". list"
if (NULL != *(hep->h_addr_list)) { $? ". element"
switch (hep->h_addrtype) {
case AF_INET : { $? ". IPv4"
sa4 = (struct sockaddr_in *)dptr;
DK4_MEMRES(sa4, sizeof(struct sockaddr_in));
sa4->sin_family = AF_INET;
sa4->sin_port = dk4socket_htons(remport);
DK4_MEMCPY(&(sa4->sin_addr),*(hep->h_addr_list),sizeof(IN_ADDR));
back = 1; $? ". found"
} break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
case AF_INET6 : { $? ". IPv6"
sa6 = (struct sockaddr_in6 *)dptr;
DK4_MEMRES(sa6, sizeof(struct sockaddr_in6));
sa6->sin6_family = AF_INET6;
sa6->sin_port = dk4socket_htons(remport);
DK4_MEMCPY(&(sa6->sin6_addr),*(hep->h_addr_list),sizeof(IN6_ADDR));
back = 1; $? ". found"
} break;
#endif
}
} else { $? "! NULL pointer"
}
} else { $? "! NULL list"
}
} else { $? "! not found"
}
$? "- dk4socket_c8_find_host %d", back
return back;
#else
int back = 0;
$? "+ dk4socket_c8_find_host (none) \"%s\"", TR_8STR(remhost)
$? "- dk4socket_c8_find_host %d", back
return back;
#endif
#endif
}
int
dk4socket_c8_udp_addresses_numeric(
dk4_sockaddr_storage_t *array,
const char *remhost,
unsigned short remport,
unsigned short locport,
int ip4,
dk4_er_t *erp
)
{
int back = DK4_SOCKET_RESULT_FAILED;
$? "+ dk4socket_c8_udp_addresses_numeric \"%s\"", TR_8STR(remhost)
if ((NULL != array) && (NULL != remhost) && (0 < remport) && (0 < locport)) {
DK4_MEMRES(array, (2*sizeof(dk4_sockaddr_storage_t)));
if (0 != dk4socket_c8_find_address(array, remhost)) {
$? ". address found"
back = dk4socket_complete_addresses(array, remport, locport);
$? ". back = %d", back
}
if (DK4_SOCKET_RESULT_FAILED == back) { $? ". no addr"
if (0 != dk4socket_c8_find_host(array, remhost, remport, ip4)) {
back = dk4socket_complete_addresses(array, remport, locport);
if (DK4_SOCKET_RESULT_FAILED == back) { $? "! not completed"
dk4error_set_simple_error_code(erp, DK4_E_BUG);
}
} else { $? "! host not found"
dk4error_set_simple_error_code(erp, DK4_E_NOT_FOUND);
}
}
} else { $? "! arguments"
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
$? "- dk4socket_c8_udp_addresses_numeric %d", back
return back;
}
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