/xio-socket.c
C | 2121 lines | 1727 code | 220 blank | 174 comment | 330 complexity | ddfb9ef9156bff2d41ea7e6bb0347103 MD5 | raw file
Possible License(s): GPL-2.0
- /* source: xio-socket.c */
- /* Copyright Gerhard Rieger */
- /* Published under the GNU General Public License V.2, see file COPYING */
- /* this file contains the source for socket related functions, and the
- implementation of generic socket addresses */
- #include "xiosysincludes.h"
- #if _WITH_SOCKET
- #include "xioopen.h"
- #include "xio-ascii.h"
- #include "xio-socket.h"
- #include "xio-named.h"
- #include "xio-unix.h"
- #if WITH_IP4
- #include "xio-ip4.h"
- #endif /* WITH_IP4 */
- #if WITH_IP6
- #include "xio-ip6.h"
- #endif /* WITH_IP6 */
- #include "xio-ip.h"
- #include "xio-listen.h"
- #include "xio-ipapp.h" /*! not clean */
- #include "xio-tcpwrap.h"
- static
- int xioopen_socket_connect(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xfd, unsigned groups,
- int dummy1, int dummy2, int dummy3);
- static
- int xioopen_socket_listen(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xfd, unsigned groups,
- int dummy1, int dummy2, int dummy3);
- static
- int xioopen_socket_sendto(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xfd, unsigned groups,
- int dummy1, int dummy2, int dummy3);
- static
- int xioopen_socket_datagram(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xfd, unsigned groups,
- int dummy1, int dummy2, int dummy3);
- static
- int xioopen_socket_recvfrom(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xfd, unsigned groups,
- int dummy1, int socktype, int dummy3);
- static
- int xioopen_socket_recv(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xfd, unsigned groups,
- int dumy1, int dummy2, int dummy3);
- static
- int _xioopen_socket_sendto(const char *pfname, const char *type,
- const char *proto, const char *address,
- struct opt *opts, int xioflags, xiofile_t *xxfd,
- unsigned groups);
- static int
- xiolog_ancillary_socket(struct cmsghdr *cmsg, int *num,
- char *typbuff, int typlen,
- char *nambuff, int namlen,
- char *envbuff, int envlen,
- char *valbuff, int vallen);
- #if WITH_GENERICSOCKET
- /* generic socket addresses */
- const struct addrdesc xioaddr_socket_connect = { "socket-connect", 1, xioopen_socket_connect, GROUP_FD|GROUP_SOCKET|GROUP_CHILD|GROUP_RETRY, 0, 0, 0 HELP(":<domain>:<protocol>:<remote-address>") };
- #if WITH_LISTEN
- const struct addrdesc xioaddr_socket_listen = { "socket-listen", 1, xioopen_socket_listen, GROUP_FD|GROUP_SOCKET|GROUP_LISTEN|GROUP_RANGE|GROUP_CHILD|GROUP_RETRY, 0, 0, 0 HELP(":<domain>:<protocol>:<local-address>") };
- #endif /* WITH_LISTEN */
- const struct addrdesc xioaddr_socket_sendto = { "socket-sendto", 3, xioopen_socket_sendto, GROUP_FD|GROUP_SOCKET, 0, 0, 0 HELP(":<domain>:<type>:<protocol>:<remote-address>") };
- const struct addrdesc xioaddr_socket_datagram= { "socket-datagram", 3, xioopen_socket_datagram, GROUP_FD|GROUP_SOCKET|GROUP_RANGE, 0, 0, 0 HELP(":<domain>:<type>:<protocol>:<remote-address>") };
- const struct addrdesc xioaddr_socket_recvfrom= { "socket-recvfrom", 3, xioopen_socket_recvfrom, GROUP_FD|GROUP_SOCKET|GROUP_RANGE|GROUP_CHILD, 0, 0, 0 HELP(":<domain>:<type>:<protocol>:<local-address>") };
- const struct addrdesc xioaddr_socket_recv = { "socket-recv", 1, xioopen_socket_recv, GROUP_FD|GROUP_SOCKET|GROUP_RANGE, 0, 0, 0 HELP(":<domain>:<type>:<protocol>:<local-address>") };
- #endif /* WITH_GENERICSOCKET */
- /* the following options apply not only to generic socket addresses but to all
- addresses that have anything to do with sockets */
- const struct optdesc opt_so_debug = { "so-debug", "debug", OPT_SO_DEBUG, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_DEBUG };
- #ifdef SO_ACCEPTCONN /* AIX433 */
- const struct optdesc opt_so_acceptconn={ "so-acceptconn","acceptconn",OPT_SO_ACCEPTCONN,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_ACCEPTCONN};
- #endif /* SO_ACCEPTCONN */
- const struct optdesc opt_so_broadcast= { "so-broadcast", "broadcast", OPT_SO_BROADCAST,GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_BROADCAST};
- const struct optdesc opt_so_reuseaddr= { "so-reuseaddr", "reuseaddr", OPT_SO_REUSEADDR,GROUP_SOCKET, PH_PREBIND, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_REUSEADDR};
- const struct optdesc opt_so_keepalive= { "so-keepalive", "keepalive", OPT_SO_KEEPALIVE,GROUP_SOCKET, PH_FD, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_KEEPALIVE};
- #if HAVE_STRUCT_LINGER
- const struct optdesc opt_so_linger = { "so-linger", "linger", OPT_SO_LINGER, GROUP_SOCKET, PH_PASTSOCKET, TYPE_LINGER,OFUNC_SOCKOPT,SOL_SOCKET, SO_LINGER };
- #else /* !HAVE_STRUCT_LINGER */
- const struct optdesc opt_so_linger = { "so-linger", "linger", OPT_SO_LINGER, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_LINGER };
- #endif /* !HAVE_STRUCT_LINGER */
- const struct optdesc opt_so_oobinline= { "so-oobinline", "oobinline", OPT_SO_OOBINLINE,GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_OOBINLINE};
- const struct optdesc opt_so_sndbuf = { "so-sndbuf", "sndbuf", OPT_SO_SNDBUF, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_SNDBUF};
- const struct optdesc opt_so_sndbuf_late={ "so-sndbuf-late","sndbuf-late",OPT_SO_SNDBUF_LATE,GROUP_SOCKET,PH_LATE,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET,SO_SNDBUF };
- const struct optdesc opt_so_rcvbuf = { "so-rcvbuf", "rcvbuf", OPT_SO_RCVBUF, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_RCVBUF};
- const struct optdesc opt_so_rcvbuf_late={"so-rcvbuf-late","rcvbuf-late",OPT_SO_RCVBUF_LATE,GROUP_SOCKET,PH_LATE,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET,SO_RCVBUF };
- const struct optdesc opt_so_error = { "so-error", "error", OPT_SO_ERROR, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_ERROR};
- const struct optdesc opt_so_type = { "so-type", "type", OPT_SO_TYPE, GROUP_SOCKET, PH_SOCKET, TYPE_INT, OFUNC_SPEC, SOL_SOCKET, SO_TYPE };
- const struct optdesc opt_so_dontroute= { "so-dontroute", "dontroute", OPT_SO_DONTROUTE,GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_DONTROUTE };
- #ifdef SO_RCVLOWAT
- const struct optdesc opt_so_rcvlowat = { "so-rcvlowat", "rcvlowat", OPT_SO_RCVLOWAT, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_RCVLOWAT };
- #endif
- #ifdef SO_RCVTIMEO
- const struct optdesc opt_so_rcvtimeo = { "so-rcvtimeo", "rcvtimeo", OPT_SO_RCVTIMEO, GROUP_SOCKET, PH_PASTSOCKET, TYPE_TIMEVAL,OFUNC_SOCKOPT,SOL_SOCKET,SO_RCVTIMEO };
- #endif
- #ifdef SO_SNDLOWAT
- const struct optdesc opt_so_sndlowat = { "so-sndlowat", "sndlowat", OPT_SO_SNDLOWAT, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_SNDLOWAT };
- #endif
- #ifdef SO_SNDTIMEO
- const struct optdesc opt_so_sndtimeo = { "so-sndtimeo", "sndtimeo", OPT_SO_SNDTIMEO, GROUP_SOCKET, PH_PASTSOCKET, TYPE_TIMEVAL,OFUNC_SOCKOPT,SOL_SOCKET,SO_SNDTIMEO };
- #endif
- /* end of setsockopt options of UNIX98 standard */
- #ifdef SO_AUDIT /* AIX 4.3.3 */
- const struct optdesc opt_so_audit = { "so-audit", "audit", OPT_SO_AUDIT, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_AUDIT };
- #endif /* SO_AUDIT */
- #ifdef SO_ATTACH_FILTER
- const struct optdesc opt_so_attach_filter={"so-attach-filter","attachfilter",OPT_SO_ATTACH_FILTER,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET,SO_ATTACH_FILTER};
- #endif
- #ifdef SO_DETACH_FILTER
- const struct optdesc opt_so_detach_filter={"so-detach-filter","detachfilter",OPT_SO_DETACH_FILTER,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET,SO_DETACH_FILTER};
- #endif
- #ifdef SO_BINDTODEVICE /* Linux: man 7 socket */
- const struct optdesc opt_so_bindtodevice={"so-bindtodevice","if",OPT_SO_BINDTODEVICE,GROUP_SOCKET,PH_PASTSOCKET,TYPE_NAME,OFUNC_SOCKOPT,SOL_SOCKET,SO_BINDTODEVICE};
- #endif
- #ifdef SO_BSDCOMPAT
- const struct optdesc opt_so_bsdcompat= { "so-bsdcompat","bsdcompat",OPT_SO_BSDCOMPAT,GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_BSDCOMPAT };
- #endif
- #ifdef SO_CKSUMRECV
- const struct optdesc opt_so_cksumrecv= { "so-cksumrecv","cksumrecv",OPT_SO_CKSUMRECV,GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_CKSUMRECV };
- #endif /* SO_CKSUMRECV */
- #ifdef SO_TIMESTAMP
- const struct optdesc opt_so_timestamp= { "so-timestamp","timestamp",OPT_SO_TIMESTAMP,GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_TIMESTAMP };
- #endif
- #ifdef SO_KERNACCEPT /* AIX 4.3.3 */
- const struct optdesc opt_so_kernaccept={ "so-kernaccept","kernaccept",OPT_SO_KERNACCEPT,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_KERNACCEPT};
- #endif /* SO_KERNACCEPT */
- #ifdef SO_NO_CHECK
- const struct optdesc opt_so_no_check = { "so-no-check", "nocheck",OPT_SO_NO_CHECK, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_NO_CHECK };
- #endif
- #ifdef SO_NOREUSEADDR /* AIX 4.3.3 */
- const struct optdesc opt_so_noreuseaddr={"so-noreuseaddr","noreuseaddr",OPT_SO_NOREUSEADDR,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET, SO_NOREUSEADDR};
- #endif /* SO_NOREUSEADDR */
- #ifdef SO_PASSCRED
- const struct optdesc opt_so_passcred = { "so-passcred", "passcred", OPT_SO_PASSCRED, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_PASSCRED};
- #endif
- #ifdef SO_PEERCRED
- const struct optdesc opt_so_peercred = { "so-peercred", "peercred", OPT_SO_PEERCRED, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT3,OFUNC_SOCKOPT, SOL_SOCKET, SO_PEERCRED};
- #endif
- #ifdef SO_PRIORITY
- const struct optdesc opt_so_priority = { "so-priority", "priority", OPT_SO_PRIORITY, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_PRIORITY};
- #endif
- #ifdef SO_REUSEPORT /* AIX 4.3.3, BSD, HP-UX */
- const struct optdesc opt_so_reuseport= { "so-reuseport","reuseport",OPT_SO_REUSEPORT,GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_REUSEPORT };
- #endif /* defined(SO_REUSEPORT) */
- #ifdef SO_SECURITY_AUTHENTICATION
- const struct optdesc opt_so_security_authentication={"so-security-authentication","securityauthentication",OPT_SO_SECURITY_AUTHENTICATION,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET,SO_SECURITY_AUTHENTICATION};
- #endif
- #ifdef SO_SECURITY_ENCRYPTION_NETWORK
- const struct optdesc opt_so_security_encryption_network={"so-security-encryption-network","securityencryptionnetwork",OPT_SO_SECURITY_ENCRYPTION_NETWORK,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET,SO_SECURITY_ENCRYPTION_NETWORK};
- #endif
- #ifdef SO_SECURITY_ENCRYPTION_TRANSPORT
- const struct optdesc opt_so_security_encryption_transport={"so-security-encryption-transport","securityencryptiontransport",OPT_SO_SECURITY_ENCRYPTION_TRANSPORT,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET,SO_SECURITY_ENCRYPTION_TRANSPORT};
- #endif
- #ifdef SO_USE_IFBUFS
- const struct optdesc opt_so_use_ifbufs={ "so-use-ifbufs","useifbufs",OPT_SO_USE_IFBUFS,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT, OFUNC_SOCKOPT, SOL_SOCKET, SO_USE_IFBUFS};
- #endif /* SO_USE_IFBUFS */
- #ifdef SO_USELOOPBACK /* AIX433, Solaris, HP-UX */
- const struct optdesc opt_so_useloopback={"so-useloopback","useloopback",OPT_SO_USELOOPBACK,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT, SOL_SOCKET, SO_USELOOPBACK};
- #endif /* SO_USELOOPBACK */
- #ifdef SO_DGRAM_ERRIND /* Solaris */
- const struct optdesc opt_so_dgram_errind={"so-dgram-errind","dgramerrind",OPT_SO_DGRAM_ERRIND,GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET,SO_DGRAM_ERRIND};
- #endif /* SO_DGRAM_ERRIND */
- #ifdef SO_DONTLINGER /* Solaris */
- const struct optdesc opt_so_dontlinger = {"so-dontlinger", "dontlinger", OPT_SO_DONTLINGER, GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT,OFUNC_SOCKOPT,SOL_SOCKET,SO_DONTLINGER };
- #endif
- /* the SO_PROTOTYPE is OS defined on Solaris, HP-UX; we lend this for a more
- general purpose */
- const struct optdesc opt_so_prototype = {"so-prototype", "prototype", OPT_SO_PROTOTYPE, GROUP_SOCKET,PH_SOCKET, TYPE_INT,OFUNC_SPEC, SOL_SOCKET,SO_PROTOTYPE };
- #ifdef FIOSETOWN
- const struct optdesc opt_fiosetown = { "fiosetown", NULL, OPT_FIOSETOWN, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_IOCTL, FIOSETOWN };
- #endif
- #ifdef SIOCSPGRP
- const struct optdesc opt_siocspgrp = { "siocspgrp", NULL, OPT_SIOCSPGRP, GROUP_SOCKET, PH_PASTSOCKET, TYPE_INT, OFUNC_IOCTL, SIOCSPGRP };
- #endif
- const struct optdesc opt_bind = { "bind", NULL, OPT_BIND, GROUP_SOCKET, PH_BIND, TYPE_STRING,OFUNC_SPEC };
- const struct optdesc opt_connect_timeout = { "connect-timeout", NULL, OPT_CONNECT_TIMEOUT, GROUP_SOCKET, PH_PASTSOCKET, TYPE_TIMEVAL, OFUNC_OFFSET, XIO_OFFSETOF(para.socket.connect_timeout) };
- const struct optdesc opt_protocol_family = { "protocol-family", "pf", OPT_PROTOCOL_FAMILY, GROUP_SOCKET, PH_PRESOCKET, TYPE_STRING, OFUNC_SPEC };
- const struct optdesc opt_protocol = { "protocol", NULL, OPT_PROTOCOL, GROUP_SOCKET, PH_PRESOCKET, TYPE_STRING, OFUNC_SPEC };
- /* generic setsockopt() options */
- const struct optdesc opt_setsockopt_int = { "setsockopt-int", "sockopt-int", OPT_SETSOCKOPT_INT, GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT_INT_INT, OFUNC_SOCKOPT_GENERIC, 0, 0 };
- const struct optdesc opt_setsockopt_bin = { "setsockopt-bin", "sockopt-bin", OPT_SETSOCKOPT_BIN, GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT_INT_BIN, OFUNC_SOCKOPT_GENERIC, 0, 0 };
- const struct optdesc opt_setsockopt_string = { "setsockopt-string", "sockopt-string", OPT_SETSOCKOPT_STRING, GROUP_SOCKET,PH_PASTSOCKET,TYPE_INT_INT_STRING, OFUNC_SOCKOPT_GENERIC, 0, 0 };
- const struct optdesc opt_null_eof = { "null-eof", NULL, OPT_NULL_EOF, GROUP_SOCKET, PH_INIT, TYPE_BOOL, OFUNC_OFFSET, XIO_OFFSETOF(para.socket.null_eof) };
- #if WITH_GENERICSOCKET
- static
- int xioopen_socket_connect(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xxfd, unsigned groups,
- int dummy1, int dummy2, int dummy3) {
- struct single *xfd = &xxfd->stream;
- const char *pfname = argv[1];
- const char *protname = argv[2];
- const char *address = argv[3];
- char *garbage;
- int pf;
- int proto;
- int socktype = SOCK_STREAM;
- int needbind = 0;
- union sockaddr_union them; socklen_t themlen; size_t themsize;
- union sockaddr_union us; socklen_t uslen = sizeof(us);
- int result;
- if (argc != 4) {
- Error2("%s: wrong number of parameters (%d instead of 3)",
- argv[0], argc-1);
- return STAT_NORETRY;
- }
- pf = strtoul(pfname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- proto = strtoul(protname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- retropt_socket_pf(opts, &pf);
- retropt_int(opts, OPT_SO_TYPE, &socktype);
- /*retropt_int(opts, OPT_IP_PROTOCOL, &proto);*/
- xfd->howtoend = END_SHUTDOWN;
- if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
- applyopts(-1, opts, PH_INIT);
- applyopts(-1, opts, PH_EARLY);
- themsize = 0;
- if ((result =
- dalan(address, (char *)&them.soa.sa_data, &themsize, sizeof(them)))
- < 0) {
- Error1("data too long: \"%s\"", address);
- } else if (result > 0) {
- Error1("syntax error in \"%s\"", address);
- }
- them.soa.sa_family = pf;
- themlen = themsize +
- #if HAVE_STRUCT_SOCKADDR_SALEN
- sizeof(them.soa.sa_len) +
- #endif
- sizeof(them.soa.sa_family);
- xfd->dtype = XIOREAD_STREAM|XIOWRITE_STREAM;
- socket_init(0, &us);
- if (retropt_bind(opts, 0 /*pf*/, socktype, proto, (struct sockaddr *)&us, &uslen, 3,
- 0, 0)
- != STAT_NOACTION) {
- needbind = true;
- us.soa.sa_family = pf;
- }
- if ((result =
- xioopen_connect(xfd,
- needbind?(struct sockaddr *)&us:NULL, uslen,
- (struct sockaddr *)&them, themlen,
- opts, pf, socktype, proto, false)) != 0) {
- return result;
- }
- if ((result = _xio_openlate(xfd, opts)) < 0) {
- return result;
- }
- return STAT_OK;
- }
- #if WITH_LISTEN
- static
- int xioopen_socket_listen(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xxfd, unsigned groups,
- int dummy1, int dummy2, int dummy3) {
- struct single *xfd = &xxfd->stream;
- const char *pfname = argv[1];
- const char *protname = argv[2];
- const char *usname = argv[3];
- char *garbage;
- int pf;
- int proto;
- int socktype = SOCK_STREAM;
- union sockaddr_union us; socklen_t uslen; size_t ussize;
- struct opt *opts0;
- int result;
- if (argc != 4) {
- Error2("%s: wrong number of parameters (%d instead of 3)",
- argv[0], argc-1);
- return STAT_NORETRY;
- }
- pf = strtoul(pfname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- proto = strtoul(protname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- retropt_socket_pf(opts, &pf);
- retropt_int(opts, OPT_SO_TYPE, &socktype);
- /*retropt_int(opts, OPT_IP_PROTOCOL, &proto);*/
- xfd->howtoend = END_SHUTDOWN;
- socket_init(0, &us);
- ussize = 0;
- if ((result =
- dalan(usname, (char *)&us.soa.sa_data, &ussize, sizeof(us)))
- < 0) {
- Error1("data too long: \"%s\"", usname);
- } else if (result > 0) {
- Error1("syntax error in \"%s\"", usname);
- }
- uslen = ussize + sizeof(us.soa.sa_family)
- #if HAVE_STRUCT_SOCKADDR_SALEN
- + sizeof(us.soa.sa_len)
- #endif
- ;
- us.soa.sa_family = pf;
- if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
- applyopts(-1, opts, PH_INIT);
- applyopts(-1, opts, PH_EARLY);
- opts0 = copyopts(opts, GROUP_ALL);
- if ((result =
- xioopen_listen(xfd, xioflags,
- (struct sockaddr *)&us, uslen,
- opts, opts0, 0/*instead of pf*/, socktype, proto))
- != STAT_OK)
- return result;
- return STAT_OK;
- }
- #endif /* WITH_LISTEN */
- /* we expect the form: ...:domain:type:protocol:remote-address */
- static
- int xioopen_socket_sendto(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xxfd, unsigned groups,
- int dummy1, int dummy2, int dummy3) {
- int result;
- if (argc != 5) {
- Error2("%s: wrong number of parameters (%d instead of 4)",
- argv[0], argc-1);
- return STAT_NORETRY;
- }
- if ((result =
- _xioopen_socket_sendto(argv[1], argv[2], argv[3], argv[4],
- opts, xioflags, xxfd, groups))
- != STAT_OK) {
- return result;
- }
- _xio_openlate(&xxfd->stream, opts);
- return STAT_OK;
- }
- static
- int _xioopen_socket_sendto(const char *pfname, const char *type,
- const char *protname, const char *address,
- struct opt *opts, int xioflags, xiofile_t *xxfd,
- unsigned groups) {
- xiosingle_t *xfd = &xxfd->stream;
- char *garbage;
- union sockaddr_union us = {{0}};
- socklen_t uslen = 0; size_t ussize;
- size_t themsize;
- int pf;
- int socktype = SOCK_RAW;
- int proto;
- bool needbind = false;
- char *bindstring = NULL;
- int result;
- pf = strtoul(pfname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- socktype = strtoul(type, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- proto = strtoul(protname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- retropt_socket_pf(opts, &pf);
- retropt_int(opts, OPT_SO_TYPE, &socktype);
- /*retropt_int(opts, OPT_IP_PROTOCOL, &proto);*/
- xfd->howtoend = END_SHUTDOWN;
- xfd->peersa.soa.sa_family = pf;
- themsize = 0;
- if ((result =
- dalan(address, (char *)&xfd->peersa.soa.sa_data, &themsize,
- sizeof(xfd->peersa)))
- < 0) {
- Error1("data too long: \"%s\"", address);
- } else if (result > 0) {
- Error1("syntax error in \"%s\"", address);
- }
- xfd->salen = themsize + sizeof(sa_family_t)
- #if HAVE_STRUCT_SOCKADDR_SALEN
- + sizeof(xfd->peersa.soa.sa_len)
- #endif
- ;
- #if HAVE_STRUCT_SOCKADDR_SALEN
- xfd->peersa.soa.sa_len =
- sizeof(xfd->peersa.soa.sa_len) + sizeof(xfd->peersa.soa.sa_family) +
- themsize;
- #endif
- /* ...res_opts[] */
- if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
- applyopts(-1, opts, PH_INIT);
- if (pf == PF_UNSPEC) {
- pf = xfd->peersa.soa.sa_family;
- }
- xfd->dtype = XIODATA_RECVFROM;
- if (retropt_string(opts, OPT_BIND, &bindstring) == 0) {
- ussize = 0;
- if ((result =
- dalan(bindstring, (char *)&us.soa.sa_data, &ussize, sizeof(us)))
- < 0) {
- Error1("data too long: \"%s\"", bindstring);
- } else if (result > 0) {
- Error1("syntax error in \"%s\"", bindstring);
- }
- us.soa.sa_family = pf;
- uslen = ussize + sizeof(sa_family_t)
- #if HAVE_STRUCT_SOCKADDR_SALEN
- + sizeof(us.soa.sa_len)
- #endif
- ;
- needbind = true;
- }
- return
- _xioopen_dgram_sendto(needbind?&us:NULL, uslen,
- opts, xioflags, xfd, groups, pf, socktype, proto);
- }
- /* we expect the form: ...:domain:socktype:protocol:local-address */
- static
- int xioopen_socket_recvfrom(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xxfd, unsigned groups,
- int dummy, int summy2, int dummy3) {
- struct single *xfd = &xxfd->stream;
- const char *pfname = argv[1];
- const char *typename = argv[2];
- const char *protname = argv[3];
- const char *address = argv[4];
- char *garbage;
- union sockaddr_union *us = &xfd->para.socket.la;
- socklen_t uslen; size_t ussize;
- int pf, socktype, proto;
- char *rangename;
- int result;
- if (argc != 5) {
- Error2("%s: wrong number of parameters (%d instead of 4)",
- argv[0], argc-1);
- return STAT_NORETRY;
- }
- pf = strtoul(pfname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- socktype = strtoul(typename, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- proto = strtoul(protname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- retropt_socket_pf(opts, &pf);
- retropt_int(opts, OPT_SO_TYPE, &socktype);
- /*retropt_int(opts, OPT_IP_PROTOCOL, &proto);*/
- xfd->howtoend = END_NONE;
- ussize = 0;
- if ((result =
- dalan(address, (char *)&us->soa.sa_data, &ussize, sizeof(*us)))
- < 0) {
- Error1("data too long: \"%s\"", address);
- } else if (result > 0) {
- Error1("syntax error in \"%s\"", address);
- }
- us->soa.sa_family = pf;
- uslen = ussize + sizeof(us->soa.sa_family)
- #if HAVE_STRUCT_SOCKADDR_SALEN
- + sizeof(us->soa.sa_len);
- #endif
- ;
- xfd->dtype = XIOREAD_RECV|XIOWRITE_SENDTO;
- if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
- if (xioparserange(rangename, 0, &xfd->para.socket.range) < 0) {
- return STAT_NORETRY;
- }
- xfd->para.socket.dorange = true;
- free(rangename);
- }
- if ((result =
- _xioopen_dgram_recvfrom(xfd, xioflags, &us->soa, uslen,
- opts, pf, socktype, proto, E_ERROR))
- != STAT_OK) {
- return result;
- }
- _xio_openlate(xfd, opts);
- return STAT_OK;
- }
- /* we expect the form: ...:domain:type:protocol:local-address */
- static
- int xioopen_socket_recv(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xxfd, unsigned groups,
- int dummy1, int dummy2, int dummy3) {
- struct single *xfd = &xxfd->stream;
- const char *pfname = argv[1];
- const char *typename = argv[2];
- const char *protname = argv[3];
- const char *address = argv[4];
- char *garbage;
- union sockaddr_union us;
- socklen_t uslen; size_t ussize;
- int pf, socktype, proto;
- char *rangename;
- int result;
- if (argc != 5) {
- Error2("%s: wrong number of parameters (%d instead of 4)",
- argv[0], argc-1);
- return STAT_NORETRY;
- }
- pf = strtoul(pfname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- socktype = strtoul(typename, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- proto = strtoul(protname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- retropt_socket_pf(opts, &pf);
- retropt_int(opts, OPT_SO_TYPE, &socktype);
- /*retropt_int(opts, OPT_IP_PROTOCOL, &proto);*/
- xfd->howtoend = END_NONE;
- ussize = 0;
- if ((result =
- dalan(address, (char *)&us.soa.sa_data, &ussize, sizeof(us)))
- < 0) {
- Error1("data too long: \"%s\"", address);
- } else if (result > 0) {
- Error1("syntax error in \"%s\"", address);
- }
- us.soa.sa_family = pf;
- uslen = ussize + sizeof(sa_family_t)
- #if HAVE_STRUCT_SOCKADDR_SALEN
- +sizeof(us.soa.sa_len)
- #endif
- ;
- xfd->dtype = XIOREAD_RECV;
- xfd->para.socket.la.soa.sa_family = pf;
- if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
- if (xioparserange(rangename, 0, &xfd->para.socket.range) < 0) {
- return STAT_NORETRY;
- }
- xfd->para.socket.dorange = true;
- free(rangename);
- }
- if ((result =
- _xioopen_dgram_recv(xfd, xioflags, &us.soa,
- uslen, opts, pf, socktype, proto, E_ERROR))
- != STAT_OK) {
- return result;
- }
- _xio_openlate(xfd, opts);
- return STAT_OK;
- }
- /* we expect the form: ...:domain:type:protocol:remote-address */
- static
- int xioopen_socket_datagram(int argc, const char *argv[], struct opt *opts,
- int xioflags, xiofile_t *xxfd, unsigned groups,
- int dummy1, int dummy2, int dummy3) {
- xiosingle_t *xfd = &xxfd->stream;
- const char *pfname = argv[1];
- const char *typename = argv[2];
- const char *protname = argv[3];
- const char *address = argv[4];
- char *garbage;
- char *rangename;
- size_t themsize;
- int pf;
- int result;
- if (argc != 5) {
- Error2("%s: wrong number of parameters (%d instead of 4)",
- argv[0], argc-1);
- return STAT_NORETRY;
- }
- pf = strtoul(pfname, &garbage, 0);
- if (*garbage != '\0') {
- Warn1("garbage in parameter: \"%s\"", garbage);
- }
- retropt_socket_pf(opts, &pf);
- /*retropt_int(opts, OPT_IP_PROTOCOL, &proto);*/
- xfd->howtoend = END_SHUTDOWN;
- xfd->peersa.soa.sa_family = pf;
- themsize = 0;
- if ((result =
- dalan(address, (char *)&xfd->peersa.soa.sa_data, &themsize,
- sizeof(xfd->peersa)))
- < 0) {
- Error1("data too long: \"%s\"", address);
- } else if (result > 0) {
- Error1("syntax error in \"%s\"", address);
- }
- xfd->salen = themsize + sizeof(sa_family_t);
- #if HAVE_STRUCT_SOCKADDR_SALEN
- xfd->peersa.soa.sa_len =
- sizeof(xfd->peersa.soa.sa_len) + sizeof(xfd->peersa.soa.sa_family) +
- themsize;
- #endif
- if ((result =
- _xioopen_socket_sendto(pfname, typename, protname, address,
- opts, xioflags, xxfd, groups))
- != STAT_OK) {
- return result;
- }
- xfd->dtype = XIOREAD_RECV|XIOWRITE_SENDTO;
- xfd->para.socket.la.soa.sa_family = xfd->peersa.soa.sa_family;
- /* which reply sockets will accept - determine by range option */
- if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
- if (xioparserange(rangename, 0, &xfd->para.socket.range) < 0) {
- free(rangename);
- return STAT_NORETRY;
- }
- xfd->para.socket.dorange = true;
- xfd->dtype |= XIOREAD_RECV_CHECKRANGE;
- free(rangename);
- }
- _xio_openlate(xfd, opts);
- return STAT_OK;
- }
- #endif /* WITH_GENERICSOCKET */
- /* a subroutine that is common to all socket addresses that want to connect
- to a peer address.
- might fork.
- applies and consumes the following options:
- PH_PASTSOCKET, PH_FD, PH_PREBIND, PH_BIND, PH_PASTBIND, PH_CONNECT,
- PH_CONNECTED, PH_LATE,
- OFUNC_OFFSET,
- OPT_SO_TYPE, OPT_SO_PROTOTYPE, OPT_USER, OPT_GROUP, OPT_CLOEXEC
- returns 0 on success.
- */
- int _xioopen_connect(struct single *xfd, struct sockaddr *us, size_t uslen,
- struct sockaddr *them, size_t themlen,
- struct opt *opts, int pf, int socktype, int protocol,
- bool alt, int level) {
- int fcntl_flags = 0;
- char infobuff[256];
- union sockaddr_union la;
- socklen_t lalen = themlen;
- int _errno;
- int result;
- if ((xfd->fd = xiosocket(opts, pf, socktype, protocol, level)) < 0) {
- return STAT_RETRYLATER;
- }
- applyopts_offset(xfd, opts);
- applyopts(xfd->fd, opts, PH_PASTSOCKET);
- applyopts(xfd->fd, opts, PH_FD);
- applyopts_cloexec(xfd->fd, opts);
- applyopts(xfd->fd, opts, PH_PREBIND);
- applyopts(xfd->fd, opts, PH_BIND);
- #if WITH_TCP || WITH_UDP
- if (alt) {
- union sockaddr_union sin, *sinp;
- unsigned short *port, i, N;
- div_t dv;
- /* prepare sockaddr for bind probing */
- if (us) {
- sinp = (union sockaddr_union *)us;
- } else {
- if (them->sa_family == AF_INET) {
- socket_in_init(&sin.ip4);
- #if WITH_IP6
- } else {
- socket_in6_init(&sin.ip6);
- #endif
- }
- sinp = &sin;
- }
- if (them->sa_family == AF_INET) {
- port = &sin.ip4.sin_port;
- #if WITH_IP6
- } else if (them->sa_family == AF_INET6) {
- port = &sin.ip6.sin6_port;
- #endif
- } else {
- port = 0; /* just to make compiler happy */
- }
- /* combine random+step variant to quickly find a free port when only
- few are in use, and certainly find a free port in defined time even
- if there are almost all in use */
- /* dirt 1: having tcp/udp code in socket function */
- /* dirt 2: using a time related system call for init of random */
- {
- /* generate a random port, with millisecond random init */
- #if 0
- struct timeb tb;
- ftime(&tb);
- srandom(tb.time*1000+tb.millitm);
- #else
- struct timeval tv;
- struct timezone tz;
- tz.tz_minuteswest = 0;
- tz.tz_dsttime = 0;
- if ((result = Gettimeofday(&tv, &tz)) < 0) {
- Warn2("gettimeofday(%p, {0,0}): %s", &tv, strerror(errno));
- }
- srandom(tv.tv_sec*1000000+tv.tv_usec);
- #endif
- }
- dv = div(random(), IPPORT_RESERVED-XIO_IPPORT_LOWER);
- i = N = XIO_IPPORT_LOWER + dv.rem;
- do { /* loop over lowport bind() attempts */
- *port = htons(i);
- if (Bind(xfd->fd, (struct sockaddr *)sinp, sizeof(*sinp)) < 0) {
- Msg4(errno==EADDRINUSE?E_INFO:level,
- "bind(%d, {%s}, "F_Zd"): %s", xfd->fd,
- sockaddr_info(&sinp->soa, sizeof(*sinp), infobuff, sizeof(infobuff)),
- sizeof(*sinp), strerror(errno));
- if (errno != EADDRINUSE) {
- Close(xfd->fd);
- return STAT_RETRYLATER;
- }
- } else {
- break; /* could bind to port, good, continue past loop */
- }
- --i; if (i < XIO_IPPORT_LOWER) i = IPPORT_RESERVED-1;
- if (i == N) {
- Msg(level, "no low port available");
- /*errno = EADDRINUSE; still assigned */
- Close(xfd->fd);
- return STAT_RETRYLATER;
- }
- } while (i != N);
- } else
- #endif /* WITH_TCP || WITH_UDP */
- if (us) {
- if (Bind(xfd->fd, us, uslen) < 0) {
- Msg4(level, "bind(%d, {%s}, "F_Zd"): %s",
- xfd->fd, sockaddr_info(us, uslen, infobuff, sizeof(infobuff)),
- uslen, strerror(errno));
- Close(xfd->fd);
- return STAT_RETRYLATER;
- }
- }
- applyopts(xfd->fd, opts, PH_PASTBIND);
- applyopts(xfd->fd, opts, PH_CONNECT);
- if (xfd->para.socket.connect_timeout.tv_sec != 0 ||
- xfd->para.socket.connect_timeout.tv_usec != 0) {
- fcntl_flags = Fcntl(xfd->fd, F_GETFL);
- Fcntl_l(xfd->fd, F_SETFL, fcntl_flags|O_NONBLOCK);
- }
- result = Connect(xfd->fd, (struct sockaddr *)them, themlen);
- _errno = errno;
- la.soa.sa_family = them->sa_family; lalen = sizeof(la);
- if (Getsockname(xfd->fd, &la.soa, &lalen) < 0) {
- Msg4(level-1, "getsockname(%d, %p, {%d}): %s",
- xfd->fd, &la.soa, lalen, strerror(errno));
- }
- errno = _errno;
- if (result < 0) {
- if (errno == EINPROGRESS) {
- if (xfd->para.socket.connect_timeout.tv_sec != 0 ||
- xfd->para.socket.connect_timeout.tv_usec != 0) {
- struct timeval timeout;
- struct pollfd writefd;
- int result;
- Info4("connect(%d, %s, "F_Zd"): %s",
- xfd->fd, sockaddr_info(them, themlen, infobuff, sizeof(infobuff)),
- themlen, strerror(errno));
- timeout = xfd->para.socket.connect_timeout;
- writefd.fd = xfd->fd;
- writefd.events = (POLLOUT|POLLERR);
- result = xiopoll(&writefd, 1, &timeout);
- if (result < 0) {
- Msg4(level, "xiopoll({%d,POLLOUT|POLLERR},,{"F_tv_sec"."F_tv_usec"): %s",
- xfd->fd, timeout.tv_sec, timeout.tv_usec, strerror(errno));
- return STAT_RETRYLATER;
- }
- if (result == 0) {
- Msg2(level, "connecting to %s: %s",
- sockaddr_info(them, themlen, infobuff, sizeof(infobuff)),
- strerror(ETIMEDOUT));
- return STAT_RETRYLATER;
- }
- if (writefd.revents & POLLERR) {
- #if 0
- unsigned char dummy[1];
- Read(xfd->fd, &dummy, 1); /* get error message */
- Msg2(level, "connecting to %s: %s",
- sockaddr_info(them, infobuff, sizeof(infobuff)),
- strerror(errno));
- #else
- Connect(xfd->fd, them, themlen); /* get error message */
- Msg4(level, "connect(%d, %s, "F_Zd"): %s",
- xfd->fd, sockaddr_info(them, themlen, infobuff, sizeof(infobuff)),
- themlen, strerror(errno));
- #endif
- return STAT_RETRYLATER;
- }
- /* otherwise OK */
- Fcntl_l(xfd->fd, F_SETFL, fcntl_flags);
- } else {
- Warn4("connect(%d, %s, "F_Zd"): %s",
- xfd->fd, sockaddr_info(them, themlen, infobuff, sizeof(infobuff)),
- themlen, strerror(errno));
- }
- } else if (pf == PF_UNIX && errno == EPROTOTYPE) {
- /* this is for UNIX domain sockets: a connect attempt seems to be
- the only way to distinguish stream and datagram sockets */
- int _errno = errno;
- Info4("connect(%d, %s, "F_Zd"): %s",
- xfd->fd, sockaddr_info(them, themlen, infobuff, sizeof(infobuff)),
- themlen, strerror(errno));
- #if 0
- Info("assuming datagram socket");
- xfd->dtype = DATA_RECVFROM;
- xfd->salen = themlen;
- memcpy(&xfd->peersa.soa, them, xfd->salen);
- #endif
- /*!!! and remove bind socket */
- Close(xfd->fd); xfd->fd = -1;
- errno = _errno;
- return -1;
- } else {
- Msg4(level, "connect(%d, %s, "F_Zd"): %s",
- xfd->fd, sockaddr_info(them, themlen, infobuff, sizeof(infobuff)),
- themlen, strerror(errno));
- Close(xfd->fd);
- return STAT_RETRYLATER;
- }
- } else { /* result >= 0 */
- Notice1("successfully connected from local address %s",
- sockaddr_info(&la.soa, themlen, infobuff, sizeof(infobuff)));
- }
- applyopts_fchown(xfd->fd, opts); /* OPT_USER, OPT_GROUP */
- applyopts(xfd->fd, opts, PH_CONNECTED);
- applyopts(xfd->fd, opts, PH_LATE);
- return STAT_OK;
- }
- /* a subroutine that is common to all socket addresses that want to connect
- to a peer address.
- might fork.
- applies and consumes the following option:
- PH_PASTSOCKET, PH_FD, PH_PREBIND, PH_BIND, PH_PASTBIND, PH_CONNECT,
- PH_CONNECTED, PH_LATE,
- OFUNC_OFFSET,
- OPT_FORK, OPT_SO_TYPE, OPT_SO_PROTOTYPE, OPT_USER, OPT_GROUP, OPT_CLOEXEC
- returns 0 on success.
- */
- int xioopen_connect(struct single *xfd, struct sockaddr *us, size_t uslen,
- struct sockaddr *them, size_t themlen,
- struct opt *opts, int pf, int socktype, int protocol,
- bool alt) {
- bool dofork = false;
- struct opt *opts0;
- char infobuff[256];
- int level;
- int result;
- retropt_bool(opts, OPT_FORK, &dofork);
- opts0 = copyopts(opts, GROUP_ALL);
- Notice1("opening connection to %s",
- sockaddr_info(them, themlen, infobuff, sizeof(infobuff)));
- do { /* loop over retries and forks */
- #if WITH_RETRY
- if (xfd->forever || xfd->retry) {
- level = E_INFO;
- } else
- #endif /* WITH_RETRY */
- level = E_ERROR;
- result =
- _xioopen_connect(xfd, us, uslen, them, themlen, opts,
- pf, socktype, protocol, alt, level);
- switch (result) {
- case STAT_OK: break;
- #if WITH_RETRY
- case STAT_RETRYLATER:
- if (xfd->forever || xfd->retry) {
- --xfd->retry;
- if (result == STAT_RETRYLATER) {
- Nanosleep(&xfd->intervall, NULL);
- }
- dropopts(opts, PH_ALL); opts = copyopts(opts0, GROUP_ALL);
- continue;
- }
- return STAT_NORETRY;
- #endif /* WITH_RETRY */
- default:
- return result;
- }
- if (dofork) {
- xiosetchilddied(); /* set SIGCHLD handler */
- }
- #if WITH_RETRY
- if (dofork) {
- pid_t pid;
- int level = E_ERROR;
- if (xfd->forever || xfd->retry) {
- level = E_WARN; /* most users won't expect a problem here,
- so Notice is too weak */
- }
- while ((pid = xio_fork(false, level)) < 0) {
- --xfd->retry;
- if (xfd->forever || xfd->retry) {
- dropopts(opts, PH_ALL); opts = copyopts(opts0, GROUP_ALL);
- Nanosleep(&xfd->intervall, NULL); continue;
- }
- return STAT_RETRYLATER;
- }
- if (pid == 0) { /* child process */
- break;
- }
- /* parent process */
- Close(xfd->fd);
- /* with and without retry */
- Nanosleep(&xfd->intervall, NULL);
- dropopts(opts, PH_ALL); opts = copyopts(opts0, GROUP_ALL);
- continue; /* with next socket() bind() connect() */
- } else
- #endif /* WITH_RETRY */
- {
- break;
- }
- #if 0
- if ((result = _xio_openlate(fd, opts)) < 0)
- return result;
- #endif
- } while (true);
- return 0;
- }
- /* common to xioopen_udp_sendto, ..unix_sendto, ..rawip
- applies and consumes the following option:
- PH_PASTSOCKET, PH_FD, PH_PREBIND, PH_BIND, PH_PASTBIND, PH_CONNECTED, PH_LATE
- OFUNC_OFFSET
- OPT_SO_TYPE, OPT_SO_PROTOTYPE, OPT_USER, OPT_GROUP, OPT_CLOEXEC
- */
- int _xioopen_dgram_sendto(/* them is already in xfd->peersa */
- union sockaddr_union *us, socklen_t uslen,
- struct opt *opts,
- int xioflags, xiosingle_t *xfd, unsigned groups,
- int pf, int socktype, int ipproto) {
- int level = E_ERROR;
- union sockaddr_union la; socklen_t lalen = sizeof(la);
- char infobuff[256];
- if ((xfd->fd = xiosocket(opts, pf, socktype, ipproto, level)) < 0) {
- return STAT_RETRYLATER;
- }
- applyopts_offset(xfd, opts);
- applyopts_single(xfd, opts, PH_PASTSOCKET);
- applyopts(xfd->fd, opts, PH_PASTSOCKET);
- applyopts(xfd->fd, opts, PH_FD);
- applyopts_cloexec(xfd->fd, opts);
- applyopts(xfd->fd, opts, PH_PREBIND);
- applyopts(xfd->fd, opts, PH_BIND);
- if (us) {
- if (Bind(xfd->fd, (struct sockaddr *)us, uslen) < 0) {
- Msg4(level, "bind(%d, {%s}, "F_socklen"): %s",
- xfd->fd, sockaddr_info((struct sockaddr *)us, uslen, infobuff, sizeof(infobuff)),
- uslen, strerror(errno));
- Close(xfd->fd);
- return STAT_RETRYLATER;
- }
- }
- applyopts(xfd->fd, opts, PH_PASTBIND);
- /*applyopts(xfd->fd, opts, PH_CONNECT);*/
- if (Getsockname(xfd->fd, &la.soa, &lalen) < 0) {
- Warn4("getsockname(%d, %p, {%d}): %s",
- xfd->fd, &la.soa, lalen, strerror(errno));
- }
- applyopts_fchown(xfd->fd, opts);
- applyopts(xfd->fd, opts, PH_CONNECTED);
- applyopts(xfd->fd, opts, PH_LATE);
- /* xfd->dtype = DATA_RECVFROM; *//* no, the caller must set this (ev _SKIPIP) */
- Notice1("successfully prepared local socket %s",
- sockaddr_info(&la.soa, lalen, infobuff, sizeof(infobuff)));
- return STAT_OK;
- }
- /* when the recvfrom address (with option fork) receives a packet it keeps this
- packet in the IP stacks input queue and forks a sub process. The sub process
- then reads this packet for processing its data.
- There is a problem because the parent process would find the same packet
- again if it calls select()/poll() before the child process reads the
- packet.
- To solve this problem we implement the following mechanism:
- The sub process sends a SIGUSR1 when it has read the packet (or a SIGCHLD if
- it dies before). The parent process waits until it receives that signal and
- only then continues to listen.
- To prevent a signal from another process to trigger our loop, we pass the
- pid of the sub process to the signal handler in xio_waitingfor. The signal
- handler sets xio_hashappened if the pid matched.
- */
- static pid_t xio_waitingfor; /* info from recv loop to signal handler:
- indicates the pid that of the child process
- that should send us the USR1 signal */
- static bool xio_hashappened; /* info from signal handler to loop: child
- process has read ("consumed") the packet */
- /* this is the signal handler for USR1 and CHLD */
- void xiosigaction_hasread(int signum
- #if HAVE_STRUCT_SIGACTION_SA_SIGACTION && defined(SA_SIGINFO)
- , siginfo_t *siginfo, void *ucontext
- #endif
- ) {
- pid_t pid;
- int _errno;
- int status = 0;
- bool wassig = false;
- #if HAVE_STRUCT_SIGACTION_SA_SIGACTION && defined(SA_SIGINFO)
- Debug5("xiosigaction_hasread(%d, {%d,%d,%d,"F_pid"}, )",
- signum, siginfo->si_signo, siginfo->si_errno, siginfo->si_code,
- siginfo->si_pid);
- #else
- Debug1("xiosigaction_hasread(%d)", signum);
- #endif
- if (signum == SIGCHLD) {
- _errno = errno;
- do {
- pid = Waitpid(-1, &status, WNOHANG);
- if (pid == 0) {
- Msg(wassig?E_INFO:E_WARN,
- "waitpid(-1, {}, WNOHANG): no child has exited");
- Info("xiosigaction_hasread() finished");
- errno = _errno;
- Debug("xiosigaction_hasread() ->");
- return;
- } else if (pid < 0 && errno == ECHILD) {
- Msg1(wassig?E_INFO:E_WARN,
- "waitpid(-1, {}, WNOHANG): %s", strerror(errno));
- Info("xiosigaction_hasread() finished");
- errno = _errno;
- Debug("xiosigaction_hasread() ->");
- return;
- }
- wassig = true;
- if (pid < 0) {
- Warn2("waitpid(-1, {%d}, WNOHANG): %s", status, strerror(errno));
- Info("xiosigaction_hasread() finished");
- errno = _errno;
- Debug("xiosigaction_hasread() ->");
- return;
- }
- if (pid == xio_waitingfor) {
- xio_hashappened = true;
- Debug("xiosigaction_hasread() ->");
- return;
- }
- } while (1);
- }
- #if HAVE_STRUCT_SIGACTION_SA_SIGACTION && defined(SA_SIGINFO)
- if (xio_waitingfor == siginfo->si_pid) {
- xio_hashappened = true;
- }
- #else
- xio_hashappened = true;
- #endif
- Debug("xiosigaction_hasread() ->");
- return;
- }
- /* waits for incoming packet, checks its source address and port. Depending
- on fork option, it may fork a subprocess.
- Returns STAT_OK if a the packet was accepted; with fork option, this is already in
- a new subprocess!
- Other return values indicate a problem; this can happen in the master
- process or in a subprocess.
- This function does not retry. If you need retries, handle this is a
- loop in the calling function.
- after fork, we set the forever/retry of the child process to 0
- applies and consumes the following options:
- PH_INIT, PH_PREBIND, PH_BIND, PH_PASTBIND, PH_EARLY, PH_PREOPEN, PH_FD,
- PH_CONNECTED, PH_LATE, PH_LATE2
- OPT_FORK, OPT_SO_TYPE, OPT_SO_PROTOTYPE, cloexec, OPT_RANGE, tcpwrap
- */
- int _xioopen_dgram_recvfrom(struct single *xfd, int xioflags,
- struct sockaddr *us, socklen_t uslen,
- struct opt *opts,
- int pf, int socktype, int proto, int level) {
- char *rangename;
- bool dofork = false;
- pid_t pid; /* mostly int; only used with fork */
- char infobuff[256];
- char lisname[256];
- bool drop = false; /* true if current packet must be dropped */
- int result;
- retropt_bool(opts, OPT_FORK, &dofork);
- if (dofork) {
- if (!(xioflags & XIO_MAYFORK)) {
- Error("option fork not allowed here");
- return STAT_NORETRY;
- }
- xfd->flags |= XIO_DOESFORK;
- }
- if (applyopts_single(xfd, opts, PH_INIT) < 0) return STAT_NORETRY;
- if ((xfd->fd = xiosocket(opts, pf, socktype, proto, level)) < 0) {
- return STAT_RETRYLATER;
- }
- applyopts_single(xfd, opts, PH_PASTSOCKET);
- applyopts(xfd->fd, opts, PH_PASTSOCKET);
- applyopts_cloexec(xfd->fd, opts);
- applyopts(xfd->fd, opts, PH_PREBIND);
- applyopts(xfd->fd, opts, PH_BIND);
- if ((us != NULL) && Bind(xfd->fd, (struct sockaddr *)us, uslen) < 0) {
- Msg4(level, "bind(%d, {%s}, "F_socklen"): %s", xfd->fd,
- sockaddr_info(us, uslen, infobuff, sizeof(infobuff)), uslen,
- strerror(errno));
- Close(xfd->fd);
- return STAT_RETRYLATER;
- }
- #if WITH_UNIX
- if (pf == AF_UNIX && us != NULL) {
- applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_FD);
- }
- #endif
- applyopts(xfd->fd, opts, PH_PASTBIND);
- #if WITH_UNIX
- if (pf == AF_UNIX && us != NULL) {
- /*applyopts_early(((struct sockaddr_un *)us)->sun_path, opts);*/
- applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_EARLY);
- applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_PREOPEN);
- }
- #endif /* WITH_UNIX */
- /* for generic sockets, this has already been retrieved */
- if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
- if (xioparserange(rangename, pf, &xfd->para.socket.range)
- < 0) {
- free(rangename);
- return STAT_NORETRY;
- }
- free(rangename);
- xfd->para.socket.dorange = true;
- }
- #if (WITH_TCP || WITH_UDP) && WITH_LIBWRAP
- xio_retropt_tcpwrap(xfd, opts);
- #endif /* && (WITH_TCP || WITH_UDP) && WITH_LIBWRAP */
- if (xioopts.logopt == 'm') {
- Info("starting recvfrom loop, switching to syslog");
- diag_set('y', xioopts.syslogfac); xioopts.logopt = 'y';
- } else {
- Info("starting recvfrom loop");
- }
- if (dofork) {
- #if HAVE_SIGACTION
- {
- struct sigaction act;
- memset(&act, 0, sizeof(struct sigaction));
- act.sa_flags = SA_NOCLDSTOP|SA_RESTART
- #ifdef SA_SIGINFO /* not on Linux 2.0(.33) */
- |SA_SIGINFO
- #endif
- #ifdef SA_NOMASK
- |SA_NOMASK
- #endif
- ;
- #if HAVE_STRUCT_SIGACTION_SA_SIGACTION && defined(SA_SIGINFO)
- act.sa_sigaction = xiosigaction_hasread;
- #else /* Linux 2.0(.33) does not have sigaction.sa_sigaction */
- act.sa_handler = xiosigaction_hasread;
- #endif
- if (Sigaction(SIGUSR1, &act, NULL) < 0) {
- /*! Linux man does not explicitely say that errno is defined */
- Warn1("sigaction(SIGUSR1, {&xiosigaction_subaddr_ok}, NULL): %s", strerror(errno));
- }
- if (Sigaction(SIGCHLD, &act, NULL) < 0) {
- /*! Linux man does not explicitely say that errno is defined */
- Warn1("sigaction(SIGCHLD, {&xiosigaction_subaddr_ok}, NULL): %s", strerror(errno));
- }
- }
- #else /* !HAVE_SIGACTION */
- /*!!!*/
- if (Signal(SIGUSR1, xiosigaction_hasread) == SIG_ERR) {
- Warn1("signal(SIGUSR1, xiosigaction_hasread): %s", strerror(errno));
- }
- if (Signal(SIGCHLD, xiosigaction_hasread) == SIG_ERR) {
- Warn1("signal(SIGCHLD, xiosigaction_hasread): %s", strerror(errno));
- }
- #endif /* !HAVE_SIGACTION */
- }
- while (true) { /* but we only loop if fork option is set */
- char peername[256];
- union sockaddr_union _peername;
- union sockaddr_union _sockname;
- union sockaddr_union *pa = &_peername; /* peer address */
- union sockaddr_union *la = &_sockname; /* local address */
- socklen_t palen = sizeof(_peername); /* peer address size */
- char ctrlbuff[1024]; /* ancillary messages */
- struct msghdr msgh = {0};
- socket_init(pf, pa);
- if (drop) {
- char *dummy[2];
- Recv(xfd->fd, dummy, sizeof(dummy), 0);
- drop = true;
- }
- /* loop until select()/poll() returns valid */
- do {
- struct pollfd readfd;
- /*? int level = E_ERROR;*/
- if (us != NULL) {
- Notice1("receiving on %s", sockaddr_info(us, uslen, lisname, sizeof(lisname)));
- } else {
- Notice1("receiving IP protocol %u", proto);
- }
- readfd.fd = xfd->fd;
- readfd.events = POLLIN;
- if (xiopoll(&readfd, 1, NULL) > 0) {
- break;
- }
- if (errno == EINTR) {
- continue;
- }
- Msg2(level, "poll({%d,,},,-1): %s", xfd->fd, strerror(errno));
- Close(xfd->fd);
- return STAT_RETRYLATER;
- } while (true);
- msgh.msg_name = pa;
- msgh.msg_namelen = palen;
- #if HAVE_STRUCT_MSGHDR_MSGCONTROL
- msgh.msg_control = ctrlbuff;
- #endif
- #if HAVE_STRUCT_MSGHDR_MSGCONTROLLEN
- msgh.msg_controllen = sizeof(ctrlbuff);
- #endif
- if (xiogetpacketsrc(xfd->fd, &msgh) < 0) {
- return STAT_RETRYLATER;
- }
- palen = msgh.msg_namelen;
- Notice1("receiving packet from %s"/*"src"*/,
- sockaddr_info((struct sockaddr *)pa, palen, peername, sizeof(peername))/*,
- sockaddr_info(&la->soa, sockname, sizeof(sockname))*/);
- xiodopacketinfo(&msgh, true, true);
- if (xiocheckpeer(xfd, pa, la) < 0) {
- /* drop packet */
- char buff[512];
- Recv(xfd->fd, buff, sizeof(buff), 0);
- continue;
- }
- Info1("permitting packet from %s",
- sockaddr_info((struct sockaddr *)pa, palen,
- infobuff, sizeof(infobuff)));
- /* set the env vars describing the local and remote sockets */
- /*xiosetsockaddrenv("SOCK", la, lalen, proto);*/
- xiosetsockaddrenv("PEER", pa, palen, proto);
- applyopts(xfd->fd, opts, PH_FD);
- applyopts(xfd->fd, opts, PH_CONNECTED);
- xfd->peersa = *(union sockaddr_union *)pa;
- xfd->salen = palen;
- if (dofork) {
- sigset_t mask_sigchldusr1;
- /* we must prevent that the current packet triggers another fork;
- therefore we wait for a signal from the recent child: USR1
- indicates that is has consumed the last packet; CHLD means it has
- terminated */
- /* block SIGCHLD and SIGUSR1 until parent is ready to react */
- sigemptyset(&mask_sigchldusr1);
- sigaddset(&mask_sigchldusr1, SIGCHLD);
- sigaddset(&mask_sigchldusr1, SIGUSR1);
- Sigprocmask(SIG_BLOCK, &mask_sigchldusr1, NULL);
- if ((pid = xio_fork(false, level)) < 0) {
- Close(xfd->fd);
- Sigprocmask(SIG_UNBLOCK, &mask_sigchldusr1, NULL);
- return STAT_RETRYLATER;
- }
- if (pid == 0) { /* child */
- /* no reason to block SIGCHLD in child process */
- Sigprocmask(SIG_UNBLOCK, &mask_sigchldusr1, NULL);
- xfd->ppid = Getppid(); /* send parent a signal when packet has
- been consumed */
- #if WITH_RETRY
- /* !? */
- xfd->retry = 0;
- xfd->forever = 0;
- level = E_ERROR;
- #endif /* WITH_RETRY */
- #if WITH_UNIX
- /* with UNIX sockets: only listening parent is allowed to remove
- the socket file */
- xfd->opt_unlink_close = false;
- #endif /* WITH_UNIX */
- break;
- }
- /* server: continue loop with listen */
- xio_waitingfor = pid;
- /* now we are ready to handle signals */
- Sigprocmask(SIG_UNBLOCK, &mask_sigchldusr1, NULL);
- while (!xio_hashappened) {
- Sleep(UINT_MAX); /* any signal lets us continue */
- }
- xio_waitingfor = 0; /* so this child will not set hashappened again */
- xio_hashappened = false;
- Info("continue listening");
- } else {
- break;
- }
- }
- if ((result = _xio_openlate(xfd, opts)) != 0)
- return STAT_NORETRY;
- return STAT_OK;
- }
- /* returns STAT_* */
- int _xioopen_dgram_recv(struct single *xfd, int xioflags,
- struct sockaddr *us, socklen_t uslen,
- struct opt *opts, int pf, int socktype, int proto,
- int level) {
- char *rangename;
- char infobuff[256];
- if (applyopts_single(xfd, opts, PH_INIT) < 0) return STAT_NORETRY;
- if ((xfd->fd = xiosocket(opts, pf, socktype, proto, level)) < 0) {
- return STAT_RETRYLATER;
- }
- applyopts_single(xfd, opts, PH_PASTSOCKET);
- applyopts(xfd->fd, opts, PH_PASTSOCKET);
- applyopts_cloexec(xfd->fd, opts);
- applyopts(xfd->fd, opts, PH_PREBIND);
- applyopts(xfd->fd, opts, PH_BIND);
- if ((us != NULL) && Bind(xfd->fd, (struct sockaddr *)us, uslen) < 0) {
- Msg4(level, "bind(%d, {%s}, "F_socklen"): %s", xfd->fd,
- sockaddr_info(us, uslen, infobuff, sizeof(infobuff)), uslen,
- strerror(errno));
- Close(xfd->fd);
- return STAT_RETRYLATER;
- }
- #if WITH_UNIX
- if (pf == AF_UNIX && us != NULL) {
- applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_FD);
- }
- #endif
- applyopts(xfd->fd, opts, PH_PASTBIND);
- #if WITH_UNIX
- if (pf == AF_UNIX && us != NULL) {
- /*applyopts_early(((struct sockaddr_un *)us)->sun_path, opts);*/
- applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_EARLY);
- applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_PREOPEN);
- }
- #endif /* WITH_UNIX */
- #if WITH_IP4 /*|| WITH_IP6*/
- if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
- if (xioparserange(rangename, pf, &xfd->para.socket.range)
- < 0) {
- free(rangename);
- return STAT_NORETRY;
- }
- free(rangename);
- xfd->para.socket.dorange = true;
- }
- #endif
- #if (WITH_TCP || WITH_UDP) && WITH_LIBWRAP
- xio_retropt_tcpwrap(xfd, opts);
- #endif /* && (WITH_TCP || WITH_UDP) && WITH_LIBWRAP */
- if (xioopts.logopt == 'm') {
- Info("starting recvfrom loop, switching to syslog");
- diag_set('y', xioopts.syslogfac); xioopts.logopt = 'y';
- } else {
- Info("starting recvfrom loop");
- }
- return STAT_OK;
- }
- int retropt_socket_pf(struct opt *opts, int *pf) {
- char *pfname;
- if (retropt_string(opts, OPT_PROTOCOL_FAMILY, &pfname) >= 0) {
- if (isdigit(pfname[0])) {
- *pf = strtoul(pfname, NULL /*!*/, 0);
- #if WITH_IP4
- } else if (!strcasecmp("inet", pfname) ||
- !strcasecmp("inet4", pfname) ||
- !strcasecmp("ip4", pfname) ||
- !strcasecmp("ipv4", pfname) ||
- !strcasecmp("2", pfname)) {
- *pf = PF_INET;
- #endif /* WITH_IP4 */
- #if WITH_IP6
- } else if (!strcasecmp("inet6", pfname) ||
- !strcasecmp("ip6", pfname) ||
- !strcasecmp("ipv6", pfname) ||
- !strcasecmp("10", pfname)) {
- *pf = PF_INET6;
- #endif /* WITH_IP6 */
- } else {
- Error1("unknown protocol family \"%s\"", pfname);
- /*! Warn("falling back to INET");*/
- }
- free(pfname);
- return 0;
- }
- return -1;
- }
- /* this function calls recvmsg(..., MSG_PEEK, ...) to obtain information about
- the arriving packet. in msgh the msg_name pointer must refer to an (empty)
- sockaddr storage. */
- int xiogetpacketsrc(int fd, struct msghdr *msgh) {
- char peekbuff[1];
- #if HAVE_STRUCT_IOVEC
- struct iovec iovec;
- #endif
- #if HAVE_STRUCT_IOVEC
- iovec.iov_base = peekbuff;
- iovec.iov_len = sizeof(peekbuff);
- msgh->msg_iov = &iovec;
- msgh->msg_iovlen = 1;
- #endif
- #if HAVE_STRUCT_MSGHDR_MSGFLAGS
- msgh->msg_flags = 0;
- #endif
- if (Recvmsg(fd, msgh, MSG_PEEK
- #ifdef MSG_TRUNC
- |MSG_TRUNC
- #endif
- ) < 0) {
- Warn1("recvmsg(): %s", strerror(errno));
- return STAT_RETRYLATER;
- }
- return STAT_OK;
- }
- /* works through the ancillary messages found in the given socket header record
- and logs the relevant information (E_DEBUG, E_INFO).
- calls protocol/layer specific functions for handling the messages
- creates appropriate environment vars if withenv is set */
- int xiodopacketinfo(struct msghdr *msgh, bool withlog, bool withenv) {
- #if defined(HAVE_STRUCT_CMSGHDR) && defined(CMSG_DATA)
- struct cmsghdr *cmsg;
- /* parse ancillary messages */
- cmsg = CMSG_FIRSTHDR(msgh);
- while (cmsg != NULL) {
- int num = 0; /* number of data components of a ancill.msg */
- int i;
- char typbuff[16], *typp;
- char nambuff[128], *namp;
- char valbuff[256], *valp;
- char envbuff[256], *envp;
- if (withlog) {
- xiodump(CMSG_DATA(cmsg),
- cmsg->cmsg_len-((char *)CMSG_DATA(cmsg)-(char *)cmsg),
- valbuff, sizeof(valbuff)-1, 0);
- Debug4("ancillary message: len="F_cmsg_len", level=%d, type=%d, data=%s",
- cmsg->cmsg_len, cmsg->cmsg_level, cmsg->cmsg_type,
- valbuff);
- }
- /* try to get the anc.msg. contents in handy components, protocol/level
- dependent */
- switch (cmsg->cmsg_level) {
- case SOL_SOCKET:
- xiolog_ancillary_socket(cmsg, &num, typbuff, sizeof(typbuff)-1,
- nambuff, sizeof(nambuff)-1,
- envbuff, sizeof(envbuff)-1,
- valbuff, sizeof(valbuff)-1);
- break;
- #if WITH_IP4 || WITH_IP6
- case SOL_IP:
- xiolog_ancillary_ip(cmsg, &num, typbuff, sizeof(typbuff)-1,
- nambuff, sizeof(nambuff)-1,
- envbuff, sizeof(envbuff)-1,
- valbuff, sizeof(valbuff)-1);
- break;
- #endif /* WITH_IP4 || WITH_IP6 */
- #if WITH_IP6
- case SOL_IPV6:
- xiolog_ancillary_ip6(cmsg, &num, typbuff, sizeof(typbuff)-1,
- nambuff, sizeof(nambuff)-1,
- envbuff, sizeof(envbuff)-1,
- valbuff, sizeof(valbuff)-1);
- break;
- #endif /* WITH_IP6 */
- default:
- num = 1;
- snprintf(typbuff, sizeof(typbuff)-1, "LEVEL%u", cmsg->cmsg_level);
- snprintf(nambuff, sizeof(nambuff)-1, "type%u", cmsg->cmsg_type);
- xiodump(CMSG_DATA(cmsg),
- cmsg->cmsg_len-((char *)CMSG_DATA(cmsg)-(char *)cmsg),
- valbuff, sizeof(valbuff)-1, 0);
- }
- /* here the info is in typbuff (one string), nambuff (num consecutive
- strings), and valbuff (num consecutive strings) */
- i = 0;
- typp = typbuff; namp = nambuff; envp = envbuff; valp = valbuff;
- while (i < num) {
- if (withlog) {
- Info3("ancillary message: %s: %s=%s", typp, namp, valp);
- }
- if (withenv) {
- if (*envp) {
- xiosetenv(envp, valp, 1);
- } else if (!strcasecmp(typp+strlen(typp)-strlen(namp), namp)) {
- xiosetenv(typp, valp, 1);
- } else {
- xiosetenv2(typp, namp, valp, 1);
- }
- }
- if (++i == num) break;
- namp = strchr(namp, '\0')+1;
- envp = strchr(envp, '\0')+1;
- valp = strchr(valp, '\0')+1;
- }
- cmsg = CMSG_NXTHDR(msgh, cmsg);
- }
- return 0;
- #else /* !(defined(HAVE_STRUCT_CMSGHDR) && defined(CMSG_DATA)) */
- return -1;
- #endif /* !(defined(HAVE_STRUCT_CMSGHDR) && defined(CMSG_DATA)) */
- }
- /* check if peer address is within permitted range.
- return >= 0 if so. */
- int xiocheckrange(union sockaddr_union *sa, struct xiorange *range) {
- switch (sa->soa.sa_family) {
- #if WITH_IP4
- case PF_INET:
- return
- xiocheckrange_ip4(&sa->ip4, range);
- #endif /* WITH_IP4 */
- #if WITH_IP6
- case PF_INET6:
- return
- xiocheckrange_ip6(&sa->ip6, range);
- #endif /* WITH_IP6 */
- #if 0
- case PF_UNSPEC:
- {
- socklen_t i;
- for (i = 0; i < sizeof(sa->soa.sa_data); ++i) {
- if ((range->netmask.soa.sa_data[i] & sa->soa.sa_data[i]) != range->netaddr.soa.sa_data[i]) {
- return -1;
- }
- }
- return 0;
- }
- #endif
- }
- return -1;
- }
- int xiocheckpeer(xiosingle_t *xfd,
- union sockaddr_union *pa, union sockaddr_union *la) {
- char infobuff[256];
- int result;
- #if WITH_IP4
- if (xfd->para.socket.dorange) {
- if (pa == NULL) { return -1; }
- if (xiocheckrange(pa, &xfd->para.socket.range) < 0) {
- char infobuff[256];
- Warn1("refusing connection from %s due to range option",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- return -1;
- }
- Info1("permitting connection from %s due to range option",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- }
- #endif /* WITH_IP4 */
- #if WITH_TCP || WITH_UDP
- if (xfd->para.socket.ip.dosourceport) {
- if (pa == NULL) { return -1; }
- #if WITH_IP4
- if (pa->soa.sa_family == AF_INET &&
- ntohs(((struct sockaddr_in *)pa)->sin_port) != xfd->para.socket.ip.sourceport) {
- Warn1("refusing connection from %s due to wrong sourceport",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- return -1;
- }
- #endif /* WITH_IP4 */
- #if WITH_IP6
- if (pa->soa.sa_family == AF_INET6 &&
- ntohs(((struct sockaddr_in6 *)pa)->sin6_port) != xfd->para.socket.ip.sourceport) {
- Warn1("refusing connection from %s due to wrong sourceport",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- return -1;
- }
- #endif /* WITH_IP6 */
- Info1("permitting connection from %s due to sourceport option",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- } else if (xfd->para.socket.ip.lowport) {
- if (pa == NULL) { return -1; }
- if (pa->soa.sa_family == AF_INET &&
- ntohs(((struct sockaddr_in *)pa)->sin_port) >= IPPORT_RESERVED) {
- Warn1("refusing connection from %s due to lowport option",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- return -1;
- }
- #if WITH_IP6
- else if (pa->soa.sa_family == AF_INET6 &&
- ntohs(((struct sockaddr_in6 *)pa)->sin6_port) >=
- IPPORT_RESERVED) {
- Warn1("refusing connection from %s due to lowport option",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- return -1;
- }
- #endif /* WITH_IP6 */
- Info1("permitting connection from %s due to lowport option",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- }
- #endif /* WITH_TCP || WITH_UDP */
- #if (WITH_TCP || WITH_UDP) && WITH_LIBWRAP
- result = xio_tcpwrap_check(xfd, la, pa);
- if (result < 0) {
- char infobuff[256];
- Warn1("refusing connection from %s due to tcpwrapper option",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- return -1;
- } else if (result > 0) {
- Info1("permitting connection from %s due to tcpwrapper option",
- sockaddr_info((struct sockaddr *)pa, 0,
- infobuff, sizeof(infobuff)));
- }
- #endif /* (WITH_TCP || WITH_UDP) && WITH_LIBWRAP */
- return 0; /* permitted */
- }
- #if HAVE_STRUCT_CMSGHDR
- /* converts the ancillary message in *cmsg into a form useable for further
- processing. knows the specifics of common message types.
- 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 or other STAT_*
- */
- static int
- xiolog_ancillary_socket(struct cmsghdr *cmsg, int *num,
- char *typbuff, int typlen,
- char *nambuff, int namlen,
- char *envbuff, int envlen,
- char *valbuff, int vallen) {
- const char *cmsgtype, *cmsgname, *cmsgenvn;
- size_t msglen;
- struct timeval *tv;
- int rc = STAT_OK;
- #if defined(CMSG_DATA)
- msglen = cmsg->cmsg_len-((char *)CMSG_DATA(cmsg)-(char *)cmsg);
- switch (cmsg->cmsg_type) {
- #ifdef SO_PASSCRED
- case SO_PASSCRED: /* this is really a UNIX/LOCAL message */
- /*! needs implementation */
- #endif /* SO_PASSCRED */
- #ifdef SO_RIGHTS
- case SO_RIGHTS: /* this is really a UNIX/LOCAL message */
- /*! needs implementation */
- #endif
- default: /* binary data */
- snprintf(typbuff, typlen, "SOCKET.%u", cmsg->cmsg_type);
- nambuff[0] = '\0'; strncat(nambuff, "data", namlen-1);
- xiodump(CMSG_DATA(cmsg), msglen, valbuff, vallen, 0);
- return STAT_OK;
- #ifdef SO_TIMESTAMP
- # ifdef SCM_TIMESTAMP
- case SCM_TIMESTAMP:
- # else
- case SO_TIMESTAMP:
- # endif
- tv = (struct timeval *)CMSG_DATA(cmsg);
- cmsgtype =
- #ifdef SCM_TIMESTAMP
- "SCM_TIMESTAMP" /* FreeBSD */
- #else
- "SO_TIMESTAMP" /* Linux */
- #endif
- ;
- cmsgname = "timestamp";
- cmsgenvn = "TIMESTAMP";
- { time_t t = tv->tv_sec; ctime_r(&t, valbuff); }
- snprintf(strchr(valbuff, '\0')-1/*del \n*/, vallen-strlen(valbuff)+1, ", %06ld usecs", (long)tv->tv_usec);
- break;
- #endif /* defined(SO_TIMESTAMP) */
- ;
- }
- /* when we come here we provide a single parameter
- with type in cmsgtype, name in cmsgname,
- and value already in valbuff */
- *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 (strlen(cmsgenvn) >= envlen) rc = STAT_WARNING;
- envbuff[0] = '\0'; strncat(envbuff, cmsgenvn, envlen-1);
- return rc;
- #else /* !defined(CMSG_DATA) */
- return STAT_NORETRY;
- #endif /* !defined(CMSG_DATA) */
- }
- #endif /* HAVE_STRUCT_CMSGHDR */
- /* return the name of the interface with given index
- or NULL if is fails
- The system call requires an arbitrary socket; the calling program may
- provide one in parameter ins to avoid creation of a dummy socket. ins must
- be <0 if it does not specify a socket fd. */
- char *xiogetifname(int ind, char *val, int ins) {
- #if !HAVE_PROTOTYPE_LIB_if_indextoname
- int s;
- struct ifreq ifr;
- if (ins >= 0) {
- s = ins;
- } else {
- if ((s = Socket(PF_INET, SOCK_DGRAM, IPPROTO_IP)) < 0) {
- Error1("socket(PF_INET, SOCK_DGRAM, IPPROTO_IP): %s", strerror(errno));
- return NULL;
- }
- }
- #if HAVE_STRUCT_IFREQ_IFR_INDEX
- ifr.ifr_index = ind;
- #elif HAVE_STRUCT_IFREQ_IFR_IFINDEX
- ifr.ifr_ifindex = ind;
- #endif
- #ifdef SIOCGIFNAME
- if(Ioctl(s, SIOCGIFNAME, &ifr) < 0) {
- #if HAVE_STRUCT_IFREQ_IFR_INDEX
- Info3("ioctl(%d, SIOCGIFNAME, {..., ifr_index=%d, ...}: %s",
- s, ifr.ifr_index, strerror(errno));
- #elif HAVE_STRUCT_IFREQ_IFR_IFINDEX
- Info3("ioctl(%d, SIOCGIFNAME, {..., ifr_ifindex=%d, ...}: %s",
- s, ifr.ifr_ifindex, strerror(errno));
- #endif
- if (ins < 0) Close(s);
- return NULL;
- }
- #endif /* SIOCGIFNAME */
- if (ins < 0) Close(s);
- strcpy(val, ifr.ifr_name);
- return val;
- #else /* HAVE_PROTOTYPE_LIB_if_indextoname */
- return if_indextoname(ind, val);
- #endif /* HAVE_PROTOTYPE_LIB_if_indextoname */
- }
- /* parses a network specification consisting of an address and a mask. */
- int xioparsenetwork(const char *rangename, int pf, struct xiorange *range) {
- size_t addrlen = 0, masklen = 0;
- int result;
- switch (pf) {
- #if WITH_IP4
- case PF_INET:
- return xioparsenetwork_ip4(rangename, range);
- break;
- #endif /* WITH_IP4 */
- #if WITH_IP6
- case PF_INET6:
- return xioparsenetwork_ip6(rangename, range);
- break;
- #endif /* WITH_IP6 */
- case PF_UNSPEC:
- {
- char *addrname;
- const char *maskname;
- if ((maskname = strchr(rangename, ':')) == NULL) {
- Error1("syntax error in range \"%s\": use <addr>:<mask>", rangename);
- return STAT_NORETRY;
- }
- ++maskname; /* skip ':' */
- if ((addrname = Malloc(maskname-rangename)) == NULL) {
- return STAT_NORETRY;
- }
- strncpy(addrname, rangename, maskname-rangename-1); /* ok */
- addrname[maskname-rangename-1] = '\0';
- result =
- dalan(addrname, (char *)&range->netaddr.soa.sa_data, &addrlen,
- sizeof(range->netaddr)-(size_t)(&((struct sockaddr *)0)->sa_data)
- /* data length */);
- if (result < 0) {
- Error1("data too long: \"%s\"", addrname);
- free(addrname); return STAT_NORETRY;
- } else if (result > 0) {
- Error1("syntax error in \"%s\"", addrname);
- free(addrname); return STAT_NORETRY;
- }
- free(addrname);
- result =
- dalan(maskname, (char *)&range->netmask.soa.sa_data, &masklen,
- sizeof(range->netaddr)-(size_t)(&((struct sockaddr *)0)->sa_data)
- /* data length */);
- if (result < 0) {
- Error1("data too long: \"%s\"", maskname);
- return STAT_NORETRY;
- } else if (result > 0) {
- Error1("syntax error in \"%s\"", maskname);
- return STAT_NORETRY;
- }
- if (addrlen != masklen) {
- Error2("network address is "F_Zu" bytes long, mask is "F_Zu" bytes long",
- addrlen, masklen);
- /* recover by padding the shorter component with 0 */
- memset((char *)&range->netaddr.soa.sa_data+addrlen, 0,
- MAX(0, addrlen-masklen));
- memset((char *)&range->netmask.soa.sa_data+masklen, 0,
- MAX(0, masklen-addrlen));
- }
- }
- break;
- default:
- Error1("range option not supported with address family %d", pf);
- return STAT_NORETRY;
- }
- return STAT_OK;
- }
- /* parses a string of form address/bits or address:mask, and fills the fields
- of the range union. The addr component is masked with mask. */
- int xioparserange(const char *rangename, int pf, struct xiorange *range) {
- int i;
- if (xioparsenetwork(rangename, pf, range) < 0) {
- return -1;
- }
- /* we have parsed the address and mask; now we make sure that the stored
- address has 0 where mask is 0, to simplify comparisions */
- switch (pf) {
- #if WITH_IP4
- case PF_INET:
- range->netaddr.ip4.sin_addr.s_addr &= range->netmask.ip4.sin_addr.s_addr;
- break;
- #endif /* WITH_IP4 */
- #if WITH_IP6
- case PF_INET6:
- return xiorange_ip6andmask(range);
- break;
- #endif /* WITH_IP6 */
- case PF_UNSPEC:
- for (i = 0; i < sizeof(range->netaddr); ++i) {
- ((char *)&range->netaddr)[i] &= ((char *)&range->netmask)[i];
- }
- break;
- default:
- Error1("range option not supported with address family %d", pf);
- return STAT_NORETRY;
- }
- return 0;
- }
- /* set environment variables describing (part of) a socket address, e.g.
- SOCAT_SOCKADDR. lr (local/remote) specifies a string like "SOCK" or "PEER".
- proto should correspond to the third parameter of socket(2) and is used to
- determine the presence of port information. */
- int xiosetsockaddrenv(const char *lr,
- union sockaddr_union *sau, socklen_t salen,
- int proto) {
- # define XIOSOCKADDRENVLEN 256
- char namebuff[XIOSOCKADDRENVLEN];
- char valuebuff[XIOSOCKADDRENVLEN];
- int idx = 0, result;
- strcpy(namebuff, lr);
- switch (sau->soa.sa_family) {
- #if WITH_UNIX
- case PF_UNIX:
- result =
- xiosetsockaddrenv_unix(idx, strchr(namebuff, '\0'), XIOSOCKADDRENVLEN-strlen(lr),
- valuebuff, XIOSOCKADDRENVLEN,
- &sau->un, salen, proto);
- xiosetenv(namebuff, valuebuff, 1);
- break;
- #endif /* WITH_UNIX */
- #if WITH_IP4
- case PF_INET:
- do {
- result =
- xiosetsockaddrenv_ip4(idx, strchr(namebuff, '\0'), XIOSOCKADDRENVLEN-strlen(lr),
- valuebuff, XIOSOCKADDRENVLEN,
- &sau->ip4, proto);
- xiosetenv(namebuff, valuebuff, 1);
- namebuff[strlen(lr)] = '\0'; ++idx;
- } while (result > 0);
- break;
- #endif /* WITH_IP4 */
- #if WITH_IP6
- case PF_INET6:
- strcpy(namebuff, lr);
- do {
- result =
- xiosetsockaddrenv_ip6(idx, strchr(namebuff, '\0'), XIOSOCKADDRENVLEN-strlen(lr),
- valuebuff, XIOSOCKADDRENVLEN,
- &sau->ip6, proto);
- xiosetenv(namebuff, valuebuff, 1);
- namebuff[strlen(lr)] = '\0'; ++idx;
- } while (result > 0);
- break;
- #endif /* WITH_IP6 */
- #if LATER
- case PF_PACKET:
- result = xiosetsockaddrenv_packet(lr, (void *)sau, proto); break;
- #endif
- default:
- result = -1;
- break;
- }
- return result;
- # undef XIOSOCKADDRENVLEN
- }
- #endif /* _WITH_SOCKET */
- /* these do sockets internally */
- /* retrieves options so-type and so-prototype from opts, calls socket, and
- ev. generates an appropriate error message.
- returns 0 on success or -1 if an error occurred. */
- int
- xiosocket(struct opt *opts, int pf, int socktype, int proto, int msglevel) {
- int result;
- retropt_int(opts, OPT_SO_TYPE, &socktype);
- retropt_int(opts, OPT_SO_PROTOTYPE, &proto);
- result = Socket(pf, socktype, proto);
- if (result < 0) {
- Msg4(msglevel, "socket(%d, %d, %d): %s",
- pf, socktype, proto, strerror(errno));
- return -1;
- }
- return result;
- }
- /* retrieves options so-type and so-prototype from opts, calls socketpair, and
- ev. generates an appropriate error message.
- returns 0 on success or -1 if an error occurred. */
- int
- xiosocketpair(struct opt *opts, int pf, int socktype, int proto, int sv[2]) {
- int result;
- retropt_int(opts, OPT_SO_TYPE, &socktype);
- retropt_int(opts, OPT_SO_PROTOTYPE, &proto);
- result = Socketpair(pf, socktype, proto, sv);
- if (result < 0) {
- Error5("socketpair(%d, %d, %d, %p): %s",
- pf, socktype, proto, sv, strerror(errno));
- return -1;
- }
- return result;
- }