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socat/xio-ip.c
Gerhard Rieger 254958a34d Added option res-nsaddr
2023-11-06 07:56:23 +01:00

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/* source: xio-ip.c */
/* Copyright Gerhard Rieger and contributors (see file CHANGES) */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this file contains the source for IP related functions */
#include "xiosysincludes.h"
#if _WITH_IP4 || _WITH_IP6
#include "xioopen.h"
#include "xio-ascii.h"
#include "xio-socket.h"
#include "xio-ip.h"
#include "xio-ip6.h"
#include "nestlex.h"
#if WITH_IP4 || WITH_IP6
#ifdef IP_OPTIONS
const struct optdesc opt_ip_options = { "ip-options", "ipoptions", OPT_IP_OPTIONS, GROUP_SOCK_IP, PH_PASTSOCKET,TYPE_BIN, OFUNC_SOCKOPT_APPEND, SOL_IP, IP_OPTIONS };
#endif
#ifdef IP_PKTINFO
const struct optdesc opt_ip_pktinfo = { "ip-pktinfo", "pktinfo", OPT_IP_PKTINFO, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_PKTINFO };
#endif
#ifdef IP_RECVTOS
const struct optdesc opt_ip_recvtos = { "ip-recvtos", "recvtos", OPT_IP_RECVTOS, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_RECVTOS };
#endif
#ifdef IP_RECVTTL /* -Cygwin */
const struct optdesc opt_ip_recvttl = { "ip-recvttl", "recvttl", OPT_IP_RECVTTL, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_RECVTTL };
#endif
#ifdef IP_RECVOPTS
const struct optdesc opt_ip_recvopts= { "ip-recvopts","recvopts", OPT_IP_RECVOPTS,GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_RECVOPTS };
#endif
#ifdef IP_RETOPTS
const struct optdesc opt_ip_retopts = { "ip-retopts", "retopts", OPT_IP_RETOPTS, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_RETOPTS };
#endif
const struct optdesc opt_ip_tos = { "ip-tos", "tos", OPT_IP_TOS, GROUP_SOCK_IP, PH_PASTSOCKET,TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_TOS };
const struct optdesc opt_ip_ttl = { "ip-ttl", "ttl", OPT_IP_TTL, GROUP_SOCK_IP, PH_PASTSOCKET,TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_TTL };
#ifdef IP_HDRINCL
const struct optdesc opt_ip_hdrincl = { "ip-hdrincl", "hdrincl", OPT_IP_HDRINCL, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_HDRINCL };
#endif
#ifdef IP_RECVERR
const struct optdesc opt_ip_recverr = { "ip-recverr", "recverr", OPT_IP_RECVERR, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_RECVERR };
#endif
#ifdef IP_MTU_DISCOVER
const struct optdesc opt_ip_mtu_discover={"ip-mtu-discover","mtudiscover",OPT_IP_MTU_DISCOVER,GROUP_SOCK_IP,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_IP,IP_MTU_DISCOVER };
#endif
#ifdef IP_MTU
const struct optdesc opt_ip_mtu = { "ip-mtu", "mtu", OPT_IP_MTU, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_MTU };
#endif
#ifdef IP_TRANSPARENT
const struct optdesc opt_ip_transparent = {"ip-transparent", "transparent", OPT_IP_TRANSPARENT, GROUP_SOCK_IP, PH_PREBIND, TYPE_BOOL, OFUNC_SOCKOPT, SOL_IP, IP_TRANSPARENT};
#endif
#ifdef IP_FREEBIND
const struct optdesc opt_ip_freebind= { "ip-freebind","freebind", OPT_IP_FREEBIND,GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_FREEBIND };
#endif
#ifdef IP_ROUTER_ALERT
const struct optdesc opt_ip_router_alert={"ip-router-alert","routeralert",OPT_IP_ROUTER_ALERT,GROUP_SOCK_IP,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_IP,IP_ROUTER_ALERT};
#endif
/* following: Linux allows int but OpenBSD reqs char/byte */
const struct optdesc opt_ip_multicast_ttl={"ip-multicast-ttl","multicastttl",OPT_IP_MULTICAST_TTL,GROUP_SOCK_IP,PH_PASTSOCKET,TYPE_BYTE,OFUNC_SOCKOPT,SOL_IP,IP_MULTICAST_TTL};
/* following: Linux allows int but OpenBSD reqs char/byte */
const struct optdesc opt_ip_multicast_loop={"ip-multicast-loop","multicastloop",OPT_IP_MULTICAST_LOOP,GROUP_SOCK_IP,PH_PASTSOCKET,TYPE_BYTE,OFUNC_SOCKOPT,SOL_IP,IP_MULTICAST_LOOP};
const struct optdesc opt_ip_multicast_if ={"ip-multicast-if", "multicast-if", OPT_IP_MULTICAST_IF, GROUP_SOCK_IP,PH_PASTSOCKET,TYPE_IP4NAME,OFUNC_SOCKOPT,SOL_IP,IP_MULTICAST_IF};
#ifdef IP_PKTOPTIONS
const struct optdesc opt_ip_pktoptions = { "ip-pktoptions", "pktopts", OPT_IP_PKTOPTIONS, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_PKTOPTIONS };
#endif
#ifdef IP_ADD_MEMBERSHIP
const struct optdesc opt_ip_add_membership = { "ip-add-membership", "membership",OPT_IP_ADD_MEMBERSHIP, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_IP_MREQN, OFUNC_SPEC, SOL_IP, IP_ADD_MEMBERSHIP };
#endif
#if defined(HAVE_STRUCT_IP_MREQ_SOURCE) && defined(IP_ADD_SOURCE_MEMBERSHIP)
const struct optdesc opt_ip_add_source_membership = { "ip-add-source-membership", "source-membership",OPT_IP_ADD_SOURCE_MEMBERSHIP, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_IP_MREQ_SOURCE, OFUNC_SOCKOPT, SOL_IP, IP_ADD_SOURCE_MEMBERSHIP };
#endif
#ifdef IP_RECVDSTADDR
const struct optdesc opt_ip_recvdstaddr = { "ip-recvdstaddr", "recvdstaddr",OPT_IP_RECVDSTADDR, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_RECVDSTADDR };
#endif
#ifdef IP_RECVIF
const struct optdesc opt_ip_recvif = { "ip-recvif", "recvdstaddrif",OPT_IP_RECVIF, GROUP_SOCK_IP, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_IP, IP_RECVIF };
#endif
#ifdef AI_ADDRCONFIG
const struct optdesc opt_ai_addrconfig = { "ai-addrconfig", "addrconfig", OPT_AI_ADDRCONFIG, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.ai_flags), XIO_SIZEOF(para.socket.ip.ai_flags), AI_ADDRCONFIG };
#endif
#ifdef AI_V4MAPPED
const struct optdesc opt_ai_v4mapped = { "ai-v4mapped", "v4mapped", OPT_AI_V4MAPPED, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.ai_flags), XIO_SIZEOF(para.socket.ip.ai_flags), AI_V4MAPPED };
#endif
#ifdef AI_PASSIVE
const struct optdesc opt_ai_passive = { "ai-passive", "passive", OPT_AI_PASSIVE, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.ai_flags), XIO_SIZEOF(para.socket.ip.ai_flags), AI_PASSIVE };
#endif
#if WITH_RESOLVE
#if WITH_RES_DEPRECATED
# define WITH_RES_AAONLY 1
# define WITH_RES_PRIMARY 1
#endif /* WITH_RES_DEPRECATED */
#if HAVE_RESOLV_H
const struct optdesc opt_res_debug = { "res-debug", NULL, OPT_RES_DEBUG, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.res.opts), XIO_SIZEOF(para.socket.ip.res.opts), RES_DEBUG };
#if WITH_RES_AAONLY
const struct optdesc opt_res_aaonly = { "res-aaonly", "aaonly", OPT_RES_AAONLY, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.res.opts), XIO_SIZEOF(para.socket.ip.res.opts), RES_AAONLY };
#endif
const struct optdesc opt_res_usevc = { "res-usevc", "usevc", OPT_RES_USEVC, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.res.opts), XIO_SIZEOF(para.socket.ip.res.opts), RES_USEVC };
#if WITH_RES_PRIMARY
const struct optdesc opt_res_primary = { "res-primary", "primary", OPT_RES_PRIMARY, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.res.opts), XIO_SIZEOF(para.socket.ip.res.opts), RES_PRIMARY };
#endif
const struct optdesc opt_res_igntc = { "res-igntc", "igntc", OPT_RES_IGNTC, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.res.opts), XIO_SIZEOF(para.socket.ip.res.opts), RES_IGNTC };
const struct optdesc opt_res_recurse = { "res-recurse", "recurse", OPT_RES_RECURSE, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.res.opts), XIO_SIZEOF(para.socket.ip.res.opts), RES_RECURSE };
const struct optdesc opt_res_defnames = { "res-defnames", "defnames", OPT_RES_DEFNAMES, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.res.opts), XIO_SIZEOF(para.socket.ip.res.opts), RES_DEFNAMES };
const struct optdesc opt_res_stayopen = { "res-stayopen", "stayopen", OPT_RES_STAYOPEN, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.res.opts), XIO_SIZEOF(para.socket.ip.res.opts), RES_STAYOPEN };
const struct optdesc opt_res_dnsrch = { "res-dnsrch", "dnsrch", OPT_RES_DNSRCH, GROUP_SOCK_IP, PH_OFFSET, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.socket.ip.res.opts), XIO_SIZEOF(para.socket.ip.res.opts), RES_DNSRCH };
#if HAVE_RES_RETRANS
const struct optdesc opt_res_retrans = { "res-retrans", "retrans", OPT_RES_RETRANS, GROUP_SOCK_IP, PH_OFFSET, TYPE_INT, OFUNC_OFFSET, XIO_OFFSETOF(para.socket.ip.res.retrans), XIO_SIZEOF(para.socket.ip.res.retrans), RES_MAXRETRANS };
#endif
#if HAVE_RES_RETRY
const struct optdesc opt_res_retry = { "res-retry", NULL, OPT_RES_RETRY, GROUP_SOCK_IP, PH_OFFSET, TYPE_INT, OFUNC_OFFSET, XIO_OFFSETOF(para.socket.ip.res.retry), XIO_SIZEOF(para.socket.ip.res.retry), RES_MAXRETRY };
#endif
#if HAVE_RES_NSADDR_LIST
const struct optdesc opt_res_nsaddr = { "res-nsaddr", "dns", OPT_RES_NSADDR, GROUP_SOCK_IP, PH_OFFSET, TYPE_IP4SOCK, OFUNC_OFFSET, XIO_OFFSETOF(para.socket.ip.res.nsaddr), XIO_SIZEOF(para.socket.ip.res.retry), RES_MAXRETRY };
#endif
#endif /* HAVE_RESOLV_H */
#endif /* WITH_RESOLVE */
#endif /* WITH_IP4 || WITH_IP6 */
int xioinit_ip(
int *pf,
char ipv)
{
if (*pf == PF_UNSPEC) {
switch (ipv) {
case '0': *pf = PF_UNSPEC; break;
#if WITH_IP4
case '4': *pf = PF_INET; break;
#endif
#if WITH_IP6
case '6': *pf = PF_INET6; break;
#endif
}
}
return 0;
}
#if HAVE_RESOLV_H
int Res_init(void) {
int result;
Debug("res_init()");
result = res_init();
Debug1("res_init() -> %d", result);
return result;
}
#endif /* HAVE_RESOLV_H */
/* the ultimate(?) socat resolver function
node: the address to be resolved; supported forms:
1.2.3.4 (IPv4 address)
[::2] (IPv6 address)
hostname (hostname resolving to IPv4 or IPv6 address)
hostname.domain (fq hostname resolving to IPv4 or IPv6 address)
service: the port specification; may be numeric or symbolic
family: PF_INET, PF_INET6, or PF_UNSPEC permitting both
socktype: SOCK_STREAM, SOCK_DGRAM, ...
protocol: IPPROTO_UDP, IPPROTO_TCP
sau: an uninitialized storage for the resulting socket address
returns: STAT_OK, STAT_RETRYLATER, STAT_NORETRY, prints message
*/
int xiogetaddrinfo(const char *node, const char *service,
int family, int socktype, int protocol,
struct addrinfo **res, const int ai_flags[2]) {
char *numnode = NULL;
size_t nodelen;
#if HAVE_GETADDRINFO
struct addrinfo hints = {0};
#else /* HAVE_PROTOTYPE_LIB_getipnodebyname || nothing */
struct hostent *host;
#endif
int error_num;
if (service && service[0]=='\0') {
Error("empty port/service");
}
#if LATER
#ifdef WITH_VSOCK
if (family == AF_VSOCK) {
error_num = sockaddr_vm_parse(&sau->vm, node, service);
if (error_num < 0)
return STAT_NORETRY;
return STAT_OK;
}
#endif /* WITH_VSOCK */
#endif /* LATER */
/* the resolver functions might handle numeric forms of node names by
reverse lookup, that's not what we want.
So we detect these and handle them specially */
if (0) { /* for canonical reasons */
;
#if WITH_IP6
} else if (node && node[0] == '[' && node[(nodelen=strlen(node))-1]==']') {
if ((numnode = Malloc(nodelen-1)) == NULL)
return STAT_NORETRY;
strncpy(numnode, node+1, nodelen-2); /* ok */
numnode[nodelen-2] = '\0';
node = numnode;
#if HAVE_GETADDRINFO
hints.ai_flags |= AI_NUMERICHOST;
#endif /* HAVE_GETADDRINFO */
if (family == PF_UNSPEC) family = PF_INET6;
#endif /* WITH_IP6 */
}
if (family == 0)
hints.ai_flags |= AI_ADDRCONFIG;
#if HAVE_GETADDRINFO
if (node != NULL || service != NULL) {
struct addrinfo *record;
if (ai_flags != NULL) {
hints.ai_flags |= ai_flags[0];
hints.ai_flags &= ~ai_flags[1];
}
hints.ai_family = family;
hints.ai_socktype = socktype;
hints.ai_protocol = protocol;
hints.ai_addrlen = 0;
hints.ai_addr = NULL;
hints.ai_canonname = NULL;
hints.ai_next = NULL;
do {
error_num = Getaddrinfo(node, service, &hints, res);
if (error_num == 0) break;
if (error_num == EAI_SOCKTYPE && socktype != 0) {
/* there are systems where kernel goes SCTP but not getaddrinfo() */
hints.ai_socktype = 0;
continue;
}
if (error_num == EAI_SERVICE && protocol != 0) {
if (hints.ai_protocol == 0) {
Error7("getaddrinfo\"%s\", \"%s\", {0x%02x,%d,%d,%d}, {}): %s",
node?node:"NULL", service?service:"NULL",
hints.ai_flags, hints.ai_family,
hints.ai_socktype, hints.ai_protocol,
gai_strerror(error_num));
if (*res != NULL)
freeaddrinfo(*res);
if (numnode)
free(numnode);
return STAT_NORETRY;
}
hints.ai_protocol = 0;
continue;
}
if ((error_num = Getaddrinfo(node, service, &hints, res)) != 0) {
Error7("getaddrinfo(\"%s\", \"%s\", {0x%02x,%d,%d,%d}, {}): %s",
node?node:"NULL", service?service:"NULL",
hints.ai_flags, hints.ai_family,
hints.ai_socktype, hints.ai_protocol,
(error_num == EAI_SYSTEM)?
strerror(errno):gai_strerror(error_num));
if (*res != NULL)
freeaddrinfo(*res);
if (numnode)
free(numnode);
return STAT_RETRYLATER;
}
} while (1);
service = NULL; /* do not resolve later again */
#if WITH_MSGLEVEL <= E_DEBUG
record = *res;
while (record) {
char buff[256/*!*/];
sockaddr_info(record->ai_addr, record->ai_addrlen, buff, sizeof(buff));
Debug5("getaddrinfo() -> flags=0x%02x family=%d socktype=%d protocol=%d addr=%s", record->ai_flags, record->ai_family, record->ai_socktype, record->ai_protocol, buff);
record = record->ai_next;
}
#endif /* WITH_MSGLEVEL <= E_DEBUG */
}
#elif HAVE_PROTOTYPE_LIB_getipnodebyname /* !HAVE_GETADDRINFO */
if (node != NULL) {
/* first fallback is getipnodebyname() */
if (family == PF_UNSPEC) {
#if WITH_IP4 && WITH_IP6
switch (xioparms.default_ip) {
case '4': pf = PF_INET; break;
case '6': pf = PF_INET6; break;
default: break; /* includes \0 */
}
#elif WITH_IP6
family = PF_INET6;
#else
family = PF_INET;
#endif
}
host = Getipnodebyname(node, family, AI_V4MAPPED, &error_num);
if (host == NULL) {
const static char ai_host_not_found[] = "Host not found";
const static char ai_no_address[] = "No address";
const static char ai_no_recovery[] = "No recovery";
const static char ai_try_again[] = "Try again";
const char *error_msg = "Unknown error";
switch (error_num) {
case HOST_NOT_FOUND: error_msg = ai_host_not_found; break;
case NO_ADDRESS: error_msg = ai_no_address;
case NO_RECOVERY: error_msg = ai_no_recovery;
case TRY_AGAIN: error_msg = ai_try_again;
}
Error2("getipnodebyname(\"%s\", ...): %s", node, error_msg);
} else {
switch (family) {
#if WITH_IP4
case PF_INET:
*socklen = sizeof(sau->ip4);
sau->soa.sa_family = PF_INET;
memcpy(&sau->ip4.sin_addr, host->h_addr_list[0], 4);
break;
#endif
#if WITH_IP6
case PF_INET6:
*socklen = sizeof(sau->ip6);
sau->soa.sa_family = PF_INET6;
memcpy(&sau->ip6.sin6_addr, host->h_addr_list[0], 16);
break;
#endif
}
}
freehostent(host);
}
#elsif 0 /* !HAVE_PROTOTYPE_LIB_getipnodebyname */
if (node != NULL) {
/* this is not a typical IP6 resolver function - but Linux
"man gethostbyname" says that the only supported address type with
this function is AF_INET _at present_, so maybe this fallback will
be useful somewhere sometimes in a future even for IP6 */
if (family == PF_UNSPEC) {
#if WITH_IP4 && WITH_IP6
switch (xioparms.default_ip) {
case '4': pf = PF_INET; break;
case '6': pf = PF_INET6; break;
default: break; /* includes \0 */
}
#elif WITH_IP6
family = PF_INET6;
#else
family = PF_INET;
#endif
}
/*!!! try gethostbyname2 for IP6 */
if ((host = Gethostbyname(node)) == NULL) {
Error2("gethostbyname(\"%s\"): %s", node,
h_errno == NETDB_INTERNAL ? strerror(errno) :
hstrerror(h_errno));
return STAT_RETRYLATER;
}
if (host->h_addrtype != family) {
Error2("xiogetaddrinfo(): \"%s\" does not resolve to %s",
node, family==PF_INET?"IP4":"IP6");
} else {
switch (family) {
#if WITH_IP4
case PF_INET:
*socklen = sizeof(sau->ip4);
sau->soa.sa_family = PF_INET;
memcpy(&sau->ip4.sin_addr, host->h_addr_list[0], 4);
break;
#endif /* WITH_IP4 */
#if WITH_IP6
case PF_INET6:
*socklen = sizeof(sau->ip6);
sau->soa.sa_family = PF_INET6;
memcpy(&sau->ip6.sin6_addr, host->h_addr_list[0], 16);
break;
#endif /* WITH_IP6 */
}
}
}
#endif
if (numnode) free(numnode);
return STAT_OK;
}
void xiofreeaddrinfo(struct addrinfo *res) {
#if HAVE_GETADDRINFO
freeaddrinfo(res);
#else
;
#endif
}
/* A simple resolver interface that just returns one address,
the first found by calling xiogetaddrinfo().
family may be AF_INET, AF_INET6, or AF_UNSPEC;
Returns -1 when an error occurred or when no result found.
*/
int xioresolve(const char *node, const char *service,
int family, int socktype, int protocol,
union sockaddr_union *addr, socklen_t *addrlen,
const int ai_flags[2])
{
struct addrinfo *res = NULL;
struct addrinfo *aip;
int rc;
rc = xiogetaddrinfo(node, service, family, socktype, protocol,
&res, ai_flags);
if (rc != 0) {
xiofreeaddrinfo(res);
return -1;
}
if (res == NULL) {
Warn1("xioresolve(node=\"%s\", ...): No result", node);
xiofreeaddrinfo(res);
return -1;
}
if (res->ai_addrlen > *addrlen) {
Warn3("xioresolve(node=\"%s\", addrlen="F_socklen", ...): "F_socklen" bytes required", node, *addrlen, res->ai_addrlen);
xiofreeaddrinfo(res);
return -1;
}
if (res->ai_next != NULL) {
Info4("xioresolve(node=\"%s\", service=%s%s%s, ...): More than one address found", node?node:"NULL", service?"\"":"", service?service:"NULL", service?"\"":"");
}
aip = res;
if (ai_flags[0] & AI_PASSIVE && family == PF_UNSPEC) {
/* We select the first IPv6 address, if available,
because this might accept IPv4 connections too */
while (aip != NULL) {
if (aip->ai_family == PF_INET6)
break;
aip = aip->ai_next;
}
if (aip == NULL)
aip = res;
}
memcpy(addr, aip->ai_addr, aip->ai_addrlen);
*addrlen = aip->ai_addrlen;
xiofreeaddrinfo(res);
return 0;
}
#if defined(HAVE_STRUCT_CMSGHDR) && defined(CMSG_DATA)
/* Converts the ancillary message in *cmsg into a form useable for further
processing. knows the specifics of common message types.
These are valid for IPv4 and IPv6
Returns the number of resulting syntax elements in *num
Returns a sequence of \0 terminated type strings in *typbuff
Returns a sequence of \0 terminated name strings in *nambuff
Returns a sequence of \0 terminated value strings in *valbuff
The respective len parameters specify the available space in the buffers
Returns STAT_OK on success
Returns STAT_WARNING if a buffer was too short and data truncated.
*/
int xiolog_ancillary_ip(
struct single *sfd,
struct cmsghdr *cmsg,
int *num,
char *typbuff, int typlen,
char *nambuff, int namlen,
char *envbuff, int envlen,
char *valbuff, int vallen)
{
int cmsgctr = 0;
const char *cmsgtype, *cmsgname = NULL, *cmsgenvn = NULL;
size_t msglen;
char scratch1[16]; /* can hold an IPv4 address in ASCII */
#if WITH_IP4 && defined(IP_PKTINFO) && HAVE_STRUCT_IN_PKTINFO
char scratch2[16];
char scratch3[16];
#endif
int rc = 0;
msglen = cmsg->cmsg_len-((char *)CMSG_DATA(cmsg)-(char *)cmsg);
envbuff[0] = '\0';
switch (cmsg->cmsg_type) {
default:
*num = 1;
typbuff[0] = '\0'; strncat(typbuff, "IP", typlen-1);
snprintf(nambuff, namlen, "type_%u", cmsg->cmsg_type);
xiodump(CMSG_DATA(cmsg), msglen, valbuff, vallen, 0);
return STAT_OK;
#if WITH_IP4
#if defined(IP_PKTINFO) && HAVE_STRUCT_IN_PKTINFO
case IP_PKTINFO: {
struct in_pktinfo *pktinfo = (struct in_pktinfo *)CMSG_DATA(cmsg);
*num = 3;
typbuff[0] = '\0'; strncat(typbuff, "IP_PKTINFO", typlen-1);
snprintf(nambuff, namlen, "%s%c%s%c%s", "if", '\0', "locaddr", '\0', "dstaddr");
snprintf(envbuff, envlen, "%s%c%s%c%s", "IP_IF", '\0',
"IP_LOCADDR", '\0', "IP_DSTADDR");
snprintf(valbuff, vallen, "%s%c%s%c%s",
xiogetifname(pktinfo->ipi_ifindex, scratch1, -1), '\0',
#if HAVE_PKTINFO_IPI_SPEC_DST
inet4addr_info(ntohl(pktinfo->ipi_spec_dst.s_addr),
scratch2, sizeof(scratch2)),
#else
"",
#endif
'\0',
inet4addr_info(ntohl(pktinfo->ipi_addr.s_addr),
scratch3, sizeof(scratch3)));
Notice3("Ancillary message: interface \"%s\", locaddr=%s, dstaddr=%s",
xiogetifname(pktinfo->ipi_ifindex, scratch1, -1),
#if HAVE_PKTINFO_IPI_SPEC_DST
inet4addr_info(ntohl(pktinfo->ipi_spec_dst.s_addr),
scratch2, sizeof(scratch2)),
#else
"",
#endif
inet4addr_info(ntohl(pktinfo->ipi_addr.s_addr),
scratch3, sizeof(scratch3)));
}
return STAT_OK;
#endif /* defined(IP_PKTINFO) && HAVE_STRUCT_IN_PKTINFO */
#endif /* WITH_IP4 */
#if defined(IP_RECVERR) && HAVE_STRUCT_SOCK_EXTENDED_ERR
case IP_RECVERR: {
struct xio_extended_err {
struct sock_extended_err see;
__u32 data0;
__u32 data1;
__u32 data2;
__u32 data3;
} ;
struct xio_extended_err *err =
(struct xio_extended_err *)CMSG_DATA(cmsg);
*num = 6;
typbuff[0] = '\0'; strncat(typbuff, "IP_RECVERR", typlen-1);
snprintf(nambuff, namlen, "%s%c%s%c%s%c%s%c%s%c%s",
"errno", '\0', "origin", '\0', "type", '\0',
"code", '\0', "info", '\0', "data");
snprintf(envbuff, envlen, "%s%c%s%c%s%c%s%c%s%c%s",
"IP_RECVERR_ERRNO", '\0', "IP_RECVERR_ORIGIN", '\0',
"IP_RECVERR_TYPE", '\0', "IP_RECVERR_CODE", '\0',
"IP_RECVERR_INFO", '\0', "IP_RECVERR_DATA");
snprintf(valbuff, vallen, "%u%c%u%c%u%c%u%c%u%c%u",
err->see.ee_errno, '\0', err->see.ee_origin, '\0', err->see.ee_type, '\0',
err->see.ee_code, '\0', err->see.ee_info, '\0', err->see.ee_data);
/* semantic part */
switch (err->see.ee_origin) {
char addrbuff[40];
#if WITH_IP4
case SO_EE_ORIGIN_ICMP:
if (1) {
inet4addr_info(ntohl(err->data1), addrbuff, sizeof(addrbuff));
Notice6("received ICMP from %s, type %d, code %d, info %d, data %d, resulting in errno %d",
addrbuff, err->see.ee_type, err->see.ee_code, err->see.ee_info, err->see.ee_data, err->see.ee_errno);
}
break;
#endif /* WITH_IP4 */
#if WITH_IP6
case SO_EE_ORIGIN_ICMP6:
if (1) {
Notice5("received ICMP type %d, code %d, info %d, data %d, resulting in errno %d",
err->see.ee_type, err->see.ee_code, err->see.ee_info, err->see.ee_data, err->see.ee_errno);
}
break;
#endif /* WITH_IP6 */
default:
Notice6("received error message origin %d, type %d, code %d, info %d, data %d, generating errno %d",
err->see.ee_origin, err->see.ee_type, err->see.ee_code, err->see.ee_info, err->see.ee_data, err->see.ee_errno);
break;
}
return STAT_OK;
}
#endif /* defined(IP_RECVERR) && HAVE_STRUCT_SOCK_EXTENDED_ERR */
#ifdef IP_RECVIF
case IP_RECVIF: {
/* spec in FreeBSD: /usr/include/net/if_dl.h */
struct sockaddr_dl *sadl = (struct sockaddr_dl *)CMSG_DATA(cmsg);
*num = 1;
typbuff[0] = '\0'; strncat(typbuff, "IP_RECVIF", typlen-1);
nambuff[0] = '\0'; strncat(nambuff, "if", namlen-1);
envbuff[0] = '\0'; strncat(envbuff, "IP_IF", envlen-1);
valbuff[0] = '\0';
strncat(valbuff,
xiosubstr(scratch1, sadl->sdl_data, 0, sadl->sdl_nlen), vallen-1);
Notice1("IP_RECVIF: %s", valbuff);
return STAT_OK;
}
#endif /* defined(IP_RECVIF) */
#if WITH_IP4
#ifdef IP_RECVDSTADDR
case IP_RECVDSTADDR:
*num = 1;
typbuff[0] = '\0'; strncat(typbuff, "IP_RECVDSTADDR", typlen-1);
nambuff[0] = '\0'; strncat(nambuff, "dstaddr", namlen-1);
envbuff[0] = '\0'; strncat(envbuff, "IP_DSTADDR", envlen-1);
inet4addr_info(ntohl(*(uint32_t *)CMSG_DATA(cmsg)), valbuff, vallen);
Notice1("IP_RECVDSTADDR: %s", valbuff);
return STAT_OK;
#endif
#endif /* WITH_IP4 */
case IP_OPTIONS:
#ifdef IP_RECVOPTS
case IP_RECVOPTS:
#endif
cmsgtype = "IP_OPTIONS"; cmsgname = "options"; cmsgctr = -1;
/*!!!*/
break;
#if XIO_ANCILLARY_TYPE_SOLARIS
case IP_RECVTOS:
#else
case IP_TOS:
#endif
cmsgtype = "IP_TOS"; cmsgname = "tos"; cmsgctr = msglen;
break;
case IP_TTL: /* Linux */
#ifdef IP_RECVTTL
case IP_RECVTTL: /* FreeBSD */
#endif
cmsgtype = "IP_TTL"; cmsgname = "ttl"; cmsgctr = msglen; break;
}
/* when we come here we provide a single parameter
with name in cmsgname, value length in msglen */
*num = 1;
if (strlen(cmsgtype) >= typlen) rc = STAT_WARNING;
typbuff[0] = '\0'; strncat(typbuff, cmsgtype, typlen-1);
if (strlen(cmsgname) >= namlen) rc = STAT_WARNING;
nambuff[0] = '\0'; strncat(nambuff, cmsgname, namlen-1);
if (cmsgenvn) {
if (strlen(cmsgenvn) >= envlen) rc = STAT_WARNING;
envbuff[0] = '\0'; strncat(envbuff, cmsgenvn, envlen-1);
} else {
envbuff[0] = '\0';
}
switch (cmsgctr) {
case sizeof(char):
snprintf(valbuff, vallen, "%u", *(unsigned char *)CMSG_DATA(cmsg));
Notice2("Ancillary message: %s=%u", cmsgname, *(unsigned char *)CMSG_DATA(cmsg));
break;
case sizeof(int):
snprintf(valbuff, vallen, "%u", (*(unsigned int *)CMSG_DATA(cmsg)));
Notice2("Ancillary message: %s=%u", cmsgname, *(unsigned int *)CMSG_DATA(cmsg));
break;
case 0:
xiodump(CMSG_DATA(cmsg), msglen, valbuff, vallen, 0); break;
default: break;
}
return rc;
}
#endif /* defined(HAVE_STRUCT_CMSGHDR) && defined(CMSG_DATA) */
#if defined(HAVE_STRUCT_IP_MREQ) || defined (HAVE_STRUCT_IP_MREQN)
int xiotype_ip_add_membership(
char *tokp,
const struct optname *ent,
struct opt *opt)
{
/* we do not resolve the addresses here because we do not yet know
if we are coping with a IPv4 or IPv6 socat address */
const char *ends[] = { ":", NULL };
const char *nests[] = { "[","]", NULL };
char buff[512], *buffp=buff; size_t bufspc = sizeof(buff)-1;
int parsres;
/* parse first IP address, expect ':' */
/*! result= */
parsres =
nestlex((const char **)&tokp, &buffp, &bufspc,
ends, NULL, NULL, nests,
true, false, false);
if (parsres < 0) {
Error1("option too long: \"%s\"", tokp);
return -1;
} else if (parsres > 0) {
Error1("syntax error in \"%s\"", tokp);
return -1;
}
if (*tokp != ':') {
Error1("syntax in option %s: missing ':'", tokp);
}
*buffp++ = '\0';
if ((opt->value.u_string/*multiaddr*/ = strdup(buff)) == NULL) {
Error1("strdup(\"%s\"): out of memory", buff);
return -1;
}
++tokp;
/* parse second IP address, expect ':' or '\0'' */
buffp = buff;
/*! result= */
parsres =
nestlex((const char **)&tokp, &buffp, &bufspc,
ends, NULL, NULL, nests,
true, false, false);
if (parsres < 0) {
Error1("option too long: \"%s\"", tokp);
return -1;
} else if (parsres > 0) {
Error1("syntax error in \"%s\"", tokp);
return -1;
}
*buffp++ = '\0';
if ((opt->value2.u_string/*param2*/ = strdup(buff)) == NULL) {
Error1("strdup(\"%s\"): out of memory", buff);
free(opt->value.u_string);
return -1;
}
#if HAVE_STRUCT_IP_MREQN
if (*tokp++ == ':') {
strncpy(opt->value3.u_string/*ifindex*/, tokp, IF_NAMESIZE); /* ok */
Info4("setting option \"%s\" to {\"%s\",\"%s\",\"%s\"}",
ent->desc->defname,
opt->value.u_string/*multiaddr*/,
opt->value2.u_string/*param2*/,
opt->value3.u_string/*ifindex*/);
} else {
/*0 opt->value3.u_string = NULL; / * is NULL from init */
Info3("setting option \"%s\" to {\"%s\",\"%s\"}",
ent->desc->defname,
opt->value.u_string/*multiaddr*/,
opt->value2.u_string/*param2*/);
}
#else /* !HAVE_STRUCT_IP_MREQN */
Info3("setting option \"%s\" to {\"%s\",\"%s\"}",
ent->desc->defname,
opt->value.u_string/*multiaddr*/,
opt->value2.u_string/*param2*/);
#endif /* !HAVE_STRUCT_IP_MREQN */
return 0;
}
#endif /* defined(HAVE_STRUCT_IP_MREQ) || defined (HAVE_STRUCT_IP_MREQN) */
#if defined(HAVE_STRUCT_IP_MREQ) || defined (HAVE_STRUCT_IP_MREQN)
int xioapply_ip_add_membership(
struct single *sfd,
struct opt *opt)
{
union {
#if HAVE_STRUCT_IP_MREQN
struct ip_mreqn mreqn;
#endif
struct ip_mreq mreq;
} ip4_mreqn = {{{0}}};
/* IPv6 not supported - seems to have different handling */
/*
mc:addr:ifname|ifind
mc:ifname|ifind
mc:addr
*/
union sockaddr_union sockaddr1;
socklen_t socklen1 = sizeof(sockaddr1.ip4);
union sockaddr_union sockaddr2;
socklen_t socklen2 = sizeof(sockaddr2.ip4);
/* First parameter is always multicast address */
/*! result */
xioresolve(opt->value.u_string/*multiaddr*/, NULL,
sfd->para.socket.la.soa.sa_family,
SOCK_DGRAM, IPPROTO_IP, &sockaddr1, &socklen1,
sfd->para.socket.ip.ai_flags);
ip4_mreqn.mreq.imr_multiaddr = sockaddr1.ip4.sin_addr;
if (0) {
; /* for canonical reasons */
#if HAVE_STRUCT_IP_MREQN
} else if (opt->value3.u_string/*ifindex*/ != NULL) {
/* three parameters */
/* second parameter is interface address */
xioresolve(opt->value2.u_string/*param2*/, NULL,
sfd->para.socket.la.soa.sa_family,
SOCK_DGRAM, IPPROTO_IP, &sockaddr2, &socklen2,
sfd->para.socket.ip.ai_flags);
ip4_mreqn.mreq.imr_interface = sockaddr2.ip4.sin_addr;
/* third parameter is interface */
if (ifindex(opt->value3.u_string/*ifindex*/,
(unsigned int *)&ip4_mreqn.mreqn.imr_ifindex, -1)
< 0) {
Error1("cannot resolve interface \"%s\"",
opt->value3.u_string/*ifindex*/);
}
#endif /* HAVE_STRUCT_IP_MREQN */
} else {
/* two parameters */
if (0) {
; /* for canonical reasons */
#if HAVE_STRUCT_IP_MREQN
/* there is a form with two parameters that uses mreqn */
} else if (ifindex(opt->value2.u_string/*param2*/,
(unsigned int *)&ip4_mreqn.mreqn.imr_ifindex,
-1)
>= 0) {
/* yes, second param converts to interface */
ip4_mreqn.mreq.imr_interface.s_addr = htonl(0);
#endif /* HAVE_STRUCT_IP_MREQN */
} else {
/*! result */
xioresolve(opt->value2.u_string/*param2*/, NULL,
sfd->para.socket.la.soa.sa_family,
SOCK_DGRAM, IPPROTO_IP,
&sockaddr2, &socklen2,
sfd->para.socket.ip.ai_flags);
ip4_mreqn.mreq.imr_interface = sockaddr2.ip4.sin_addr;
}
}
#if LATER
if (0) {
; /* for canonical reasons */
} else if (sfd->para.socket.la.soa.sa_family == PF_INET) {
} else if (sfd->para.socket.la.soa.sa_family == PF_INET6) {
ip6_mreqn.mreq.imr_multiaddr = sockaddr1.ip6.sin6_addr;
ip6_mreqn.mreq.imr_interface = sockaddr2.ip6.sin6_addr;
}
#endif
#if HAVE_STRUCT_IP_MREQN
if (Setsockopt(sfd->fd, opt->desc->major, opt->desc->minor,
&ip4_mreqn.mreqn, sizeof(ip4_mreqn.mreqn)) < 0) {
Error8("setsockopt(%d, %d, %d, {0x%08x,0x%08x,%d}, "F_Zu"): %s",
sfd->fd, opt->desc->major, opt->desc->minor,
ip4_mreqn.mreqn.imr_multiaddr.s_addr,
ip4_mreqn.mreqn.imr_address.s_addr,
ip4_mreqn.mreqn.imr_ifindex,
sizeof(ip4_mreqn.mreqn),
strerror(errno));
opt->desc = ODESC_ERROR;
return -1;
}
#else
if (Setsockopt(sfd->fd, opt->desc->major, opt->desc->minor,
&ip4_mreqn.mreq, sizeof(ip4_mreqn.mreq)) < 0) {
Error7("setsockopt(%d, %d, %d, {0x%08x,0x%08x}, "F_Zu"): %s",
sfd->fd, opt->desc->major, opt->desc->minor,
ip4_mreqn.mreq.imr_multiaddr,
ip4_mreqn.mreq.imr_interface,
sizeof(ip4_mreqn.mreq),
strerror(errno));
opt->desc = ODESC_ERROR;
return -1;
}
#endif
return 0;
}
#endif /* defined(HAVE_STRUCT_IP_MREQ) || defined (HAVE_STRUCT_IP_MREQN) */
#if HAVE_STRUCT_IP_MREQ_SOURCE
int xiotype_ip_add_source_membership(char *token, const struct optname *ent, struct opt *opt) {
/* we do not resolve the addresses here because we do not yet know
if we are coping with an IPv4 or IPv6 socat address */
const char *ends[] = { ":", NULL };
const char *nests[] = { "[","]", NULL };
char buff[512], *buffp=buff; size_t bufspc = sizeof(buff)-1;
char *tokp = token;
int parsres;
/* parse first IP address, expect ':' */
parsres =
nestlex((const char **)&tokp, &buffp, &bufspc,
ends, NULL, NULL, nests,
true, false, false);
if (parsres < 0) {
Error1("option too long: \"%s\"", token);
return -1;
} else if (parsres > 0) {
Error1("syntax error in \"%s\"", token);
return -1;
}
if (*tokp != ':') {
Error1("syntax in option %s: missing ':'", token);
}
*buffp++ = '\0';
if ((opt->value.u_string/*mcaddr*/ = strdup(buff)) == NULL) {
Error1("strdup(\"%s\"): out of memory", buff);
return -1;
}
++tokp;
/* parse second IP address, expect ':' or '\0'' */
buffp = buff;
/*! result= */
parsres =
nestlex((const char **)&tokp, &buffp, &bufspc,
ends, NULL, NULL, nests,
true, false, false);
if (parsres < 0) {
Error1("option too long: \"%s\"", token);
return -1;
} else if (parsres > 0) {
Error1("syntax error in \"%s\"", token);
return -1;
}
if (*tokp != ':') {
Error1("syntax in option %s: missing ':'", token);
}
*buffp++ = '\0';
if ((opt->value2.u_string/*ifaddr*/ = strdup(buff)) == NULL) {
Error1("strdup(\"%s\"): out of memory", buff);
free(opt->value.u_string);
return -1;
}
++tokp;
/* parse third IP address, expect ':' or '\0'' */
buffp = buff;
/*! result= */
parsres =
nestlex((const char **)&tokp, &buffp, &bufspc,
ends, NULL, NULL, nests,
true, false, false);
if (parsres < 0) {
Error1("option too long: \"%s\"", token);
return -1;
} else if (parsres > 0) {
Error1("syntax error in \"%s\"", token);
return -1;
}
if (*tokp) {
Error1("syntax in option %s: trailing cruft", token);
}
*buffp++ = '\0';
if ((opt->value3.u_string/*srcaddr*/ = strdup(buff)) == NULL) {
Error1("strdup(\"%s\"): out of memory", buff);
free(opt->value.u_string);
free(opt->value2.u_string);
return -1;
}
Info4("setting option \"%s\" to {0x%08x,0x%08x,0x%08x}",
ent->desc->defname,
ntohl(*(unsigned int *)opt->value.u_string/*mcaddr*/),
ntohl(*(unsigned int *)opt->value2.u_string/*ifaddr*/),
ntohl(*(unsigned int *)opt->value3.u_string/*srcaddr*/));
return 0;
}
int xioapply_ip_add_source_membership(struct single *sfd, struct opt *opt) {
struct ip_mreq_source ip4_mreq_src = {{0}};
/* IPv6 not supported - seems to have different handling */
union sockaddr_union sockaddr1;
socklen_t socklen1 = sizeof(sockaddr1.ip4);
union sockaddr_union sockaddr2;
socklen_t socklen2 = sizeof(sockaddr2.ip4);
union sockaddr_union sockaddr3;
socklen_t socklen3 = sizeof(sockaddr3.ip4);
int rc;
/* first parameter is always multicast address */
rc = xioresolve(opt->value.u_string/*mcaddr*/, NULL,
sfd->para.socket.la.soa.sa_family,
SOCK_DGRAM, IPPROTO_IP,
&sockaddr1, &socklen1, sfd->para.socket.ip.ai_flags);
if (rc < 0) {
return -1;
}
ip4_mreq_src.imr_multiaddr = sockaddr1.ip4.sin_addr;
/* second parameter is interface address */
rc = xioresolve(opt->value.u_string/*ifaddr*/, NULL,
sfd->para.socket.la.soa.sa_family,
SOCK_DGRAM, IPPROTO_IP,
&sockaddr2, &socklen2, sfd->para.socket.ip.ai_flags);
if (rc < 0) {
return -1;
}
ip4_mreq_src.imr_interface = sockaddr2.ip4.sin_addr;
/* third parameter is source address */
rc = xioresolve(opt->value.u_string/*srcaddr*/, NULL,
sfd->para.socket.la.soa.sa_family,
SOCK_DGRAM, IPPROTO_IP,
&sockaddr3, &socklen3, sfd->para.socket.ip.ai_flags);
if (rc < 0) {
return -1;
}
ip4_mreq_src.imr_sourceaddr = sockaddr3.ip4.sin_addr;
if (Setsockopt(sfd->fd, opt->desc->major, opt->desc->minor,
&ip4_mreq_src, sizeof(ip4_mreq_src)) < 0) {
Error8("setsockopt(%d, %d, %d, {0x%08x,0x%08x,0x%08x}, "F_Zu"): %s",
sfd->fd, opt->desc->major, opt->desc->minor,
htonl((uint32_t)ip4_mreq_src.imr_multiaddr.s_addr),
ip4_mreq_src.imr_interface.s_addr,
ip4_mreq_src.imr_sourceaddr.s_addr,
sizeof(struct ip_mreq_source),
strerror(errno));
opt->desc = ODESC_ERROR;
return -1;
}
return 0;
}
#endif /* HAVE_STRUCT_IP_MREQ_SOURCE */
#if WITH_RESOLVE
#if HAVE_RESOLV_H
/* When there are options for resolver then this function saves the current
resolver settings to save_res and applies the options to resolver libs state
in _res.
Returns 1 when there were options (state needs to be restored later, see
xio_res_restore());
Returns 0 when there were no options;
Returns -1 on error. */
int xio_res_init(
struct single *sfd,
struct __res_state *save_res)
{
if (sfd->para.socket.ip.res.opts[0] ||
sfd->para.socket.ip.res.opts[1] ||
#if HAVE_RES_RETRANS
sfd->para.socket.ip.res.retrans >= 0 ||
#endif
#if HAVE_RES_RETRY
sfd->para.socket.ip.res.retry >= 0 ||
#endif
#if HAVE_RES_NSADDR_LIST
sfd->para.socket.ip.res.nsaddr.sin_family != PF_UNSPEC ||
#endif
0 /* for canonical reasons */
) {
if (!(_res.options & RES_INIT)) {
if (Res_init() < 0) {
Error("res_init() failed");
return -1;
}
}
*save_res = _res;
_res.options |= sfd->para.socket.ip.res.opts[0];
_res.options &= ~sfd->para.socket.ip.res.opts[1];
Debug2("changed _res.options from 0x%lx to 0x%lx",
save_res->options, _res.options);
#if HAVE_RES_RETRANS
if (sfd->para.socket.ip.res.retrans >= 0) {
_res.retrans = sfd->para.socket.ip.res.retrans;
Debug2("changed _res.retrans from 0x%x to 0x%x",
save_res->retrans, _res.retrans);
}
#endif
#if HAVE_RES_RETRY
if (sfd->para.socket.ip.res.retry >= 0) {
_res.retry = sfd->para.socket.ip.res.retry;
Debug2("changed _res.retry from 0x%x to 0x%x",
save_res->retry, _res.retry);
}
#endif
#if HAVE_RES_NSADDR_LIST
if (sfd->para.socket.ip.res.nsaddr.sin_family == PF_INET) {
_res.nscount = 1;
_res.nsaddr_list[0] = sfd->para.socket.ip.res.nsaddr;
if (_res.nsaddr_list[0].sin_port == htons(0))
_res.nsaddr_list[0].sin_port = htons(53);
Debug10("changed _res.nsaddr_list[0] from %u.%u.%u.%u:%u to %u.%u.%u.%u:%u",
((unsigned char *)&save_res->nsaddr_list[0].sin_addr.s_addr)[0],
((unsigned char *)&save_res->nsaddr_list[0].sin_addr.s_addr)[1],
((unsigned char *)&save_res->nsaddr_list[0].sin_addr.s_addr)[2],
((unsigned char *)&save_res->nsaddr_list[0].sin_addr.s_addr)[3],
ntohs(save_res->nsaddr_list[0].sin_port),
((unsigned char *)&_res.nsaddr_list[0].sin_addr.s_addr)[0],
((unsigned char *)&_res.nsaddr_list[0].sin_addr.s_addr)[1],
((unsigned char *)&_res.nsaddr_list[0].sin_addr.s_addr)[2],
((unsigned char *)&_res.nsaddr_list[0].sin_addr.s_addr)[3],
ntohs(_res.nsaddr_list[0].sin_port));
}
#endif /* HAVE_RES_NSADDR_LIST */
return 1;
}
return 0;
}
int xio_res_restore(
struct __res_state *save_res)
{
_res = *save_res;
return 0;
}
#endif /* HAVE_RESOLV_H */
#endif /* WITH_RESOLVE */
#endif /* _WITH_IP4 || _WITH_IP6 */
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