1 /* This file is part of the YAZ toolkit.
2 * Copyright (C) 1995-2013 Index Data
3 * See the file LICENSE for details.
7 * \brief Implements TCP/IP + SSL COMSTACK.
21 #include <sys/types.h>
31 /* VS 2003 or later has getaddrinfo; older versions do not */
35 #define HAVE_GETADDRINFO 1
37 #define HAVE_GETADDRINFO 0
42 #include <netinet/in.h>
48 #include <arpa/inet.h>
50 #if HAVE_NETINET_TCP_H
51 #include <netinet/tcp.h>
54 #include <sys/socket.h>
61 #include <gnutls/x509.h>
62 #include <gnutls/gnutls.h>
66 #if HAVE_OPENSSL_SSL_H
67 #include <openssl/ssl.h>
68 #include <openssl/err.h>
72 #include <yaz/comstack.h>
73 #include <yaz/tcpip.h>
74 #include <yaz/errno.h>
76 static void tcpip_close(COMSTACK h);
77 static int tcpip_put(COMSTACK h, char *buf, int size);
78 static int tcpip_get(COMSTACK h, char **buf, int *bufsize);
79 static int tcpip_put_connect(COMSTACK h, char *buf, int size);
80 static int tcpip_get_connect(COMSTACK h, char **buf, int *bufsize);
81 static int tcpip_connect(COMSTACK h, void *address);
82 static int tcpip_more(COMSTACK h);
83 static int tcpip_rcvconnect(COMSTACK h);
84 static int tcpip_bind(COMSTACK h, void *address, int mode);
85 static int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
86 int (*check_ip)(void *cd, const char *a, int len, int type),
88 static int tcpip_set_blocking(COMSTACK p, int blocking);
91 static int ssl_get(COMSTACK h, char **buf, int *bufsize);
92 static int ssl_put(COMSTACK h, char *buf, int size);
95 static COMSTACK tcpip_accept(COMSTACK h);
96 static const char *tcpip_addrstr(COMSTACK h);
97 static void *tcpip_straddr(COMSTACK h, const char *str);
105 #ifndef YAZ_SOCKLEN_T
106 #define YAZ_SOCKLEN_T int
110 struct tcpip_cred_ptr {
111 gnutls_certificate_credentials_t xcred;
116 /* this state is used for both SSL and straight TCP/IP */
117 typedef struct tcpip_state
119 char *altbuf; /* alternate buffer for surplus data */
120 int altsize; /* size as xmalloced */
121 int altlen; /* length of data or 0 if none */
123 int written; /* -1 if we aren't writing */
124 int towrite; /* to verify against user input */
125 int (*complete)(const char *buf, int len); /* length/complete. */
129 struct sockaddr_in addr; /* returned by cs_straddr */
131 char buf[128]; /* returned by cs_addrstr */
133 struct tcpip_cred_ptr *cred_ptr;
134 gnutls_session_t session;
135 char cert_fname[256];
136 #elif HAVE_OPENSSL_SSL_H
137 SSL_CTX *ctx; /* current CTX. */
138 SSL_CTX *ctx_alloc; /* If =ctx it is owned by CS. If 0 it is not owned */
140 char cert_fname[256];
142 char *connect_request_buf;
143 int connect_request_len;
144 char *connect_response_buf;
145 int connect_response_len;
149 static int tcpip_init(void)
151 static int initialized = 0;
157 requested = MAKEWORD(1, 1);
158 if (WSAStartup(requested, &wd))
165 static int tcpip_init(void)
172 * This function is always called through the cs_create() macro.
173 * s >= 0: socket has already been established for us.
175 COMSTACK tcpip_type(int s, int flags, int protocol, void *vp)
182 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
184 if (!(sp = (struct tcpip_state *)(p->cprivate =
185 xmalloc(sizeof(tcpip_state)))))
192 p->type = tcpip_type;
193 p->protocol = (enum oid_proto) protocol;
195 p->f_connect = tcpip_connect;
196 p->f_rcvconnect = tcpip_rcvconnect;
197 p->f_get = tcpip_get;
198 p->f_put = tcpip_put;
199 p->f_close = tcpip_close;
200 p->f_more = tcpip_more;
201 p->f_bind = tcpip_bind;
202 p->f_listen = tcpip_listen;
203 p->f_accept = tcpip_accept;
204 p->f_addrstr = tcpip_addrstr;
205 p->f_straddr = tcpip_straddr;
206 p->f_set_blocking = tcpip_set_blocking;
207 p->max_recv_bytes = 128 * 1024 * 1024;
209 p->state = s < 0 ? CS_ST_UNBND : CS_ST_IDLE; /* state of line */
217 strcpy(sp->cert_fname, "yaz.pem");
218 #elif HAVE_OPENSSL_SSL_H
219 sp->ctx = sp->ctx_alloc = 0;
221 strcpy(sp->cert_fname, "yaz.pem");
228 sp->altsize = sp->altlen = 0;
229 sp->towrite = sp->written = -1;
230 if (protocol == PROTO_WAIS)
231 sp->complete = completeWAIS;
233 sp->complete = cs_complete_auto;
235 sp->connect_request_buf = 0;
236 sp->connect_request_len = 0;
237 sp->connect_response_buf = 0;
238 sp->connect_response_len = 0;
240 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
241 TRC(fprintf(stderr, "Created new TCPIP comstack h=%p\n", p));
246 COMSTACK yaz_tcpip_create(int s, int flags, int protocol,
247 const char *connect_host)
249 COMSTACK p = tcpip_type(s, flags, protocol, 0);
254 tcpip_state *sp = (tcpip_state *) p->cprivate;
255 sp->connect_request_buf = (char *) xmalloc(strlen(connect_host) + 30);
256 sprintf(sp->connect_request_buf, "CONNECT %s HTTP/1.0\r\n\r\n",
258 sp->connect_request_len = strlen(sp->connect_request_buf);
259 p->f_put = tcpip_put_connect;
260 p->f_get = tcpip_get_connect;
261 sp->complete = cs_complete_auto_head; /* only want HTTP header */
267 static void tcpip_create_cred(COMSTACK cs)
269 tcpip_state *sp = (tcpip_state *) cs->cprivate;
270 sp->cred_ptr = (struct tcpip_cred_ptr *) xmalloc(sizeof(*sp->cred_ptr));
271 sp->cred_ptr->ref = 1;
272 gnutls_certificate_allocate_credentials(&sp->cred_ptr->xcred);
277 COMSTACK ssl_type(int s, int flags, int protocol, void *vp)
285 p = tcpip_type(s, flags, protocol, 0);
291 sp = (tcpip_state *) p->cprivate;
294 sp->session = (gnutls_session_t) vp;
295 #elif HAVE_OPENSSL_SSL_H
296 sp->ctx = (SSL_CTX *) vp; /* may be NULL */
298 /* note: we don't handle already opened socket in SSL mode - yet */
304 static int ssl_check_error(COMSTACK h, tcpip_state *sp, int res)
306 #if HAVE_OPENSSL_SSL_H
307 int err = SSL_get_error(sp->ssl, res);
308 TRC(fprintf(stderr, "got err=%d\n", err));
309 if (err == SSL_ERROR_WANT_READ)
311 TRC(fprintf(stderr, " -> SSL_ERROR_WANT_READ\n"));
312 h->io_pending = CS_WANT_READ;
315 if (err == SSL_ERROR_WANT_WRITE)
317 TRC(fprintf(stderr, " -> SSL_ERROR_WANT_WRITE\n"));
318 h->io_pending = CS_WANT_WRITE;
322 TRC(fprintf(stderr, "ssl_check_error error=%d fatal=%d msg=%s\n",
324 gnutls_error_is_fatal(res),
325 gnutls_strerror(res)));
326 if (res == GNUTLS_E_AGAIN || res == GNUTLS_E_INTERRUPTED)
328 int dir = gnutls_record_get_direction(sp->session);
329 TRC(fprintf(stderr, " -> incomplete dir=%d\n", dir));
330 h->io_pending = dir ? CS_WANT_WRITE : CS_WANT_READ;
334 h->cerrno = CSERRORSSL;
340 /* resolve using getaddrinfo */
341 struct addrinfo *tcpip_getaddrinfo(const char *str, const char *port,
344 struct addrinfo hints, *res;
349 hints.ai_family = AF_UNSPEC;
350 hints.ai_socktype = SOCK_STREAM;
351 hints.ai_protocol = 0;
352 hints.ai_addrlen = 0;
353 hints.ai_addr = NULL;
354 hints.ai_canonname = NULL;
355 hints.ai_next = NULL;
357 strncpy(host, str, sizeof(host)-1);
358 host[sizeof(host)-1] = 0;
359 if ((p = strchr(host, '/')))
361 if ((p = strrchr(host, ':')))
367 if (!strcmp("@", host))
369 hints.ai_flags = AI_PASSIVE;
370 hints.ai_family = AF_UNSPEC;
371 error = getaddrinfo(0, port, &hints, &res);
374 else if (!strcmp("@4", host))
376 hints.ai_flags = AI_PASSIVE;
377 hints.ai_family = AF_INET;
378 error = getaddrinfo(0, port, &hints, &res);
381 else if (!strcmp("@6", host))
383 hints.ai_flags = AI_PASSIVE;
384 hints.ai_family = AF_INET6;
385 error = getaddrinfo(0, port, &hints, &res);
390 error = getaddrinfo(host, port, &hints, &res);
399 /* gethostbyname .. old systems */
400 int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add,
405 short int port = default_port;
407 unsigned long tmpadd;
411 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
412 add->sin_family = AF_INET;
413 strncpy(buf, str, sizeof(buf)-1);
414 buf[sizeof(buf)-1] = 0;
415 if ((p = strchr(buf, '/')))
417 if ((p = strrchr(buf, ':')))
422 add->sin_port = htons(port);
423 if (!strcmp("@", buf))
425 add->sin_addr.s_addr = INADDR_ANY;
427 else if ((tmpadd = inet_addr(buf)) != -1)
429 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
431 else if ((hp = gethostbyname(buf)))
433 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
434 sizeof(struct in_addr));
442 void *tcpip_straddr(COMSTACK h, const char *str)
444 tcpip_state *sp = (tcpip_state *)h->cprivate;
445 const char *port = "210";
446 struct addrinfo *ai = 0;
448 if (h->protocol == PROTO_HTTP)
450 if (h->type == ssl_type)
459 freeaddrinfo(sp->ai);
460 sp->ai = tcpip_getaddrinfo(str, port, &ipv6_only);
461 if (sp->ai && h->state == CS_ST_UNBND)
464 for (ai = sp->ai; ai; ai = ai->ai_next)
466 if (ai->ai_family == AF_INET6)
468 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
475 for (ai = sp->ai; ai; ai = ai->ai_next)
477 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
486 if (ai->ai_family == AF_INET6 && ipv6_only >= 0 &&
487 setsockopt(h->iofile,
489 IPV6_V6ONLY, &ipv6_only, sizeof(ipv6_only)))
491 if (!tcpip_set_blocking(h, h->flags))
497 void *tcpip_straddr(COMSTACK h, const char *str)
499 tcpip_state *sp = (tcpip_state *)h->cprivate;
501 if (h->protocol == PROTO_HTTP)
503 if (h->type == ssl_type)
511 if (!tcpip_strtoaddr_ex(str, &sp->addr, port))
513 if (h->state == CS_ST_UNBND)
516 s = socket(AF_INET, SOCK_STREAM, 0);
521 if (!tcpip_set_blocking(h, h->flags))
528 int tcpip_more(COMSTACK h)
530 tcpip_state *sp = (tcpip_state *)h->cprivate;
532 return sp->altlen && (*sp->complete)(sp->altbuf, sp->altlen);
536 * connect(2) will block (sometimes) - nothing we can do short of doing
537 * weird things like spawning subprocesses or threading or some weird junk
540 int tcpip_connect(COMSTACK h, void *address)
543 struct addrinfo *ai = (struct addrinfo *) address;
544 tcpip_state *sp = (tcpip_state *)h->cprivate;
546 struct sockaddr_in *add = (struct sockaddr_in *) address;
549 TRC(fprintf(stderr, "tcpip_connect h=%p\n", h));
551 if (h->state != CS_ST_UNBND)
553 h->cerrno = CSOUTSTATE;
557 r = connect(h->iofile, ai->ai_addr, ai->ai_addrlen);
558 freeaddrinfo(sp->ai);
561 r = connect(h->iofile, (struct sockaddr *) add, sizeof(*add));
566 if (WSAGetLastError() == WSAEWOULDBLOCK)
568 h->event = CS_CONNECT;
569 h->state = CS_ST_CONNECTING;
570 h->io_pending = CS_WANT_WRITE;
574 if (yaz_errno() == EINPROGRESS)
576 h->event = CS_CONNECT;
577 h->state = CS_ST_CONNECTING;
578 h->io_pending = CS_WANT_WRITE|CS_WANT_READ;
585 h->event = CS_CONNECT;
586 h->state = CS_ST_CONNECTING;
588 return tcpip_rcvconnect(h);
594 int tcpip_rcvconnect(COMSTACK h)
597 tcpip_state *sp = (tcpip_state *)h->cprivate;
599 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
601 if (h->state == CS_ST_DATAXFER)
603 if (h->state != CS_ST_CONNECTING)
605 h->cerrno = CSOUTSTATE;
609 if (h->type == ssl_type && !sp->session)
611 gnutls_global_init();
612 tcpip_create_cred(h);
613 gnutls_init(&sp->session, GNUTLS_CLIENT);
614 gnutls_set_default_priority(sp->session);
615 gnutls_credentials_set (sp->session, GNUTLS_CRD_CERTIFICATE,
616 sp->cred_ptr->xcred);
617 /* cast to intermediate size_t to avoid GCC warning. */
618 gnutls_transport_set_ptr(sp->session,
619 (gnutls_transport_ptr_t)
624 int res = gnutls_handshake(sp->session);
627 if (ssl_check_error(h, sp, res))
632 #elif HAVE_OPENSSL_SSL_H
633 if (h->type == ssl_type && !sp->ctx)
636 SSL_load_error_strings();
638 sp->ctx = sp->ctx_alloc = SSL_CTX_new(SSLv23_client_method());
641 h->cerrno = CSERRORSSL;
651 sp->ssl = SSL_new(sp->ctx);
652 SSL_set_fd(sp->ssl, h->iofile);
654 res = SSL_connect(sp->ssl);
657 if (ssl_check_error(h, sp, res))
664 h->state = CS_ST_DATAXFER;
668 #define CERTF "ztest.pem"
669 #define KEYF "ztest.pem"
671 static int tcpip_bind(COMSTACK h, void *address, int mode)
674 tcpip_state *sp = (tcpip_state *)h->cprivate;
676 struct addrinfo *ai = (struct addrinfo *) address;
678 struct sockaddr *addr = (struct sockaddr *)address;
687 if (h->type == ssl_type && !sp->session)
690 gnutls_global_init();
692 tcpip_create_cred(h);
694 res = gnutls_certificate_set_x509_key_file(sp->cred_ptr->xcred,
697 GNUTLS_X509_FMT_PEM);
698 if (res != GNUTLS_E_SUCCESS)
700 h->cerrno = CSERRORSSL;
704 #elif HAVE_OPENSSL_SSL_H
705 if (h->type == ssl_type && !sp->ctx)
708 SSL_load_error_strings();
710 sp->ctx = sp->ctx_alloc = SSL_CTX_new(SSLv23_server_method());
713 h->cerrno = CSERRORSSL;
722 res = SSL_CTX_use_certificate_file(sp->ctx, sp->cert_fname,
726 ERR_print_errors_fp(stderr);
729 res = SSL_CTX_use_PrivateKey_file(sp->ctx, sp->cert_fname,
733 ERR_print_errors_fp(stderr);
736 res = SSL_CTX_check_private_key(sp->ctx);
739 ERR_print_errors_fp(stderr);
743 TRC(fprintf(stderr, "ssl_bind\n"));
747 TRC(fprintf(stderr, "tcpip_bind\n"));
750 TRC(fprintf(stderr, "tcpip_bind\n"));
753 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
754 &one, sizeof(one)) < 0)
761 r = bind(h->iofile, ai->ai_addr, ai->ai_addrlen);
762 freeaddrinfo(sp->ai);
765 r = bind(h->iofile, addr, sizeof(struct sockaddr_in));
772 /* Allow a maximum-sized backlog of waiting-to-connect clients */
773 if (mode == CS_SERVER && listen(h->iofile, SOMAXCONN) < 0)
778 h->state = CS_ST_IDLE;
779 h->event = CS_LISTEN;
783 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
784 int (*check_ip)(void *cd, const char *a, int len, int t),
788 /* we don't get peer address on Windows (via accept) */
790 struct sockaddr_in addr;
791 YAZ_SOCKLEN_T len = sizeof(addr);
794 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
795 if (h->state != CS_ST_IDLE)
797 h->cerrno = CSOUTSTATE;
801 h->newfd = accept(h->iofile, 0, 0);
803 h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len);
809 WSAGetLastError() == WSAEWOULDBLOCK
811 yaz_errno() == EWOULDBLOCK
813 #if EAGAIN != EWOULDBLOCK
814 || yaz_errno() == EAGAIN
819 h->cerrno = CSNODATA;
823 shutdown(h->iofile, SD_RECEIVE);
825 shutdown(h->iofile, SHUT_RD);
827 listen(h->iofile, SOMAXCONN);
836 if (addrlen && (size_t) (*addrlen) >= sizeof(struct sockaddr_in))
837 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
840 if (check_ip && (*check_ip)(cd, (const char *) &addr,
841 sizeof(addr), AF_INET))
845 closesocket(h->newfd);
853 h->state = CS_ST_INCON;
857 COMSTACK tcpip_accept(COMSTACK h)
861 unsigned long tru = 1;
864 TRC(fprintf(stderr, "tcpip_accept h=%p pid=%d\n", h, getpid()));
865 if (h->state == CS_ST_INCON)
867 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
868 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
872 closesocket(h->newfd);
879 memcpy(cnew, h, sizeof(*h));
880 cnew->iofile = h->newfd;
881 cnew->io_pending = 0;
883 if (!(state = (tcpip_state *)
884 (cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
890 closesocket(h->newfd);
898 if (!tcpip_set_blocking(cnew, cnew->flags))
904 closesocket(h->newfd);
916 state->altsize = state->altlen = 0;
917 state->towrite = state->written = -1;
918 state->complete = st->complete;
922 cnew->state = CS_ST_ACCEPT;
923 h->state = CS_ST_IDLE;
926 state->cred_ptr = st->cred_ptr;
932 (state->cred_ptr->ref)++;
933 gnutls_init(&state->session, GNUTLS_SERVER);
940 res = gnutls_set_default_priority(state->session);
941 if (res != GNUTLS_E_SUCCESS)
947 res = gnutls_credentials_set(state->session,
948 GNUTLS_CRD_CERTIFICATE,
949 st->cred_ptr->xcred);
950 if (res != GNUTLS_E_SUCCESS)
956 /* cast to intermediate size_t to avoid GCC warning. */
957 gnutls_transport_set_ptr(state->session,
958 (gnutls_transport_ptr_t)
959 (size_t) cnew->iofile);
961 #elif HAVE_OPENSSL_SSL_H
962 state->ctx = st->ctx;
963 state->ctx_alloc = 0;
964 state->ssl = st->ssl;
967 state->ssl = SSL_new(state->ctx);
968 SSL_set_fd(state->ssl, cnew->iofile);
971 state->connect_request_buf = 0;
972 state->connect_response_buf = 0;
975 if (h->state == CS_ST_ACCEPT)
978 tcpip_state *state = (tcpip_state *)h->cprivate;
981 int res = gnutls_handshake(state->session);
984 if (ssl_check_error(h, state, res))
986 TRC(fprintf(stderr, "gnutls_handshake int in tcpip_accept\n"));
989 TRC(fprintf(stderr, "gnutls_handshake failed in tcpip_accept\n"));
993 TRC(fprintf(stderr, "SSL_accept complete. gnutls\n"));
995 #elif HAVE_OPENSSL_SSL_H
996 tcpip_state *state = (tcpip_state *)h->cprivate;
1001 res = SSL_accept(state->ssl);
1002 TRC(fprintf(stderr, "SSL_accept res=%d\n", res));
1005 if (ssl_check_error(h, state, res))
1012 TRC(fprintf(stderr, "SSL_accept complete\n"));
1018 h->cerrno = CSOUTSTATE;
1022 h->state = CS_ST_DATAXFER;
1027 #define CS_TCPIP_BUFCHUNK 4096
1030 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
1031 * 0=connection closed.
1033 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
1035 tcpip_state *sp = (tcpip_state *)h->cprivate;
1037 int tmpi, berlen, rest, req, tomove;
1038 int hasread = 0, res;
1040 TRC(fprintf(stderr, "tcpip_get: h=%p bufsize=%d\n", h, *bufsize));
1041 if (sp->altlen) /* switch buffers */
1043 TRC(fprintf(stderr, " %d bytes in altbuf (%p)\n", sp->altlen,
1048 *bufsize = sp->altsize;
1049 hasread = sp->altlen;
1055 while (!(berlen = (*sp->complete)(*buf, hasread)))
1059 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
1061 h->cerrno = CSYSERR;
1065 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
1066 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
1068 h->cerrno = CSYSERR;
1073 /* unfortunatly, sun sometimes forgets to set errno in recv
1074 when EWOULDBLOCK etc. would be required (res = -1) */
1076 res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0);
1077 TRC(fprintf(stderr, " recv res=%d, hasread=%d\n", res, hasread));
1080 TRC(fprintf(stderr, " recv errno=%d, (%s)\n", yaz_errno(),
1081 strerror(yaz_errno())));
1083 if (WSAGetLastError() == WSAEWOULDBLOCK)
1085 h->io_pending = CS_WANT_READ;
1090 h->cerrno = CSYSERR;
1094 if (yaz_errno() == EWOULDBLOCK
1096 #if EAGAIN != EWOULDBLOCK
1097 || yaz_errno() == EAGAIN
1100 || yaz_errno() == EINPROGRESS
1102 || yaz_errno() == ENOENT /* Sun's sometimes set errno to this */
1106 h->io_pending = CS_WANT_READ;
1109 else if (yaz_errno() == 0)
1113 h->cerrno = CSYSERR;
1121 if (hasread > h->max_recv_bytes)
1123 h->cerrno = CSBUFSIZE;
1127 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
1129 /* move surplus buffer (or everything if we didn't get a BER rec.) */
1130 if (hasread > berlen)
1132 tomove = req = hasread - berlen;
1133 rest = tomove % CS_TCPIP_BUFCHUNK;
1135 req += CS_TCPIP_BUFCHUNK - rest;
1138 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
1140 h->cerrno = CSYSERR;
1143 } else if (sp->altsize < req)
1144 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
1146 h->cerrno = CSYSERR;
1149 TRC(fprintf(stderr, " Moving %d bytes to altbuf(%p)\n", tomove,
1151 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
1153 if (berlen < CS_TCPIP_BUFCHUNK - 1)
1154 *(*buf + berlen) = '\0';
1155 return berlen ? berlen : 1;
1161 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
1162 * 0=connection closed.
1164 int ssl_get(COMSTACK h, char **buf, int *bufsize)
1166 tcpip_state *sp = (tcpip_state *)h->cprivate;
1168 int tmpi, berlen, rest, req, tomove;
1169 int hasread = 0, res;
1171 TRC(fprintf(stderr, "ssl_get: bufsize=%d\n", *bufsize));
1172 if (sp->altlen) /* switch buffers */
1174 TRC(fprintf(stderr, " %d bytes in altbuf (%p)\n", sp->altlen,
1179 *bufsize = sp->altsize;
1180 hasread = sp->altlen;
1186 while (!(berlen = (*sp->complete)(*buf, hasread)))
1190 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
1193 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
1194 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
1197 res = gnutls_record_recv(sp->session, *buf + hasread,
1201 TRC(fprintf(stderr, "gnutls_record_recv returned 0\n"));
1206 if (ssl_check_error(h, sp, res))
1211 res = SSL_read(sp->ssl, *buf + hasread, CS_TCPIP_BUFCHUNK);
1212 TRC(fprintf(stderr, " SSL_read res=%d, hasread=%d\n", res, hasread));
1215 if (ssl_check_error(h, sp, res))
1222 TRC (fprintf (stderr, " Out of read loop with hasread=%d, berlen=%d\n",
1224 /* move surplus buffer (or everything if we didn't get a BER rec.) */
1225 if (hasread > berlen)
1227 tomove = req = hasread - berlen;
1228 rest = tomove % CS_TCPIP_BUFCHUNK;
1230 req += CS_TCPIP_BUFCHUNK - rest;
1233 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
1235 } else if (sp->altsize < req)
1236 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
1238 TRC(fprintf(stderr, " Moving %d bytes to altbuf(%p)\n", tomove,
1240 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
1242 if (berlen < CS_TCPIP_BUFCHUNK - 1)
1243 *(*buf + berlen) = '\0';
1244 return berlen ? berlen : 1;
1249 * Returns 1, 0 or -1
1250 * In nonblocking mode, you must call again with same buffer while
1251 * return value is 1.
1253 int tcpip_put(COMSTACK h, char *buf, int size)
1256 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
1258 TRC(fprintf(stderr, "tcpip_put: h=%p size=%d\n", h, size));
1261 if (state->towrite < 0)
1263 state->towrite = size;
1266 else if (state->towrite != size)
1268 h->cerrno = CSWRONGBUF;
1271 while (state->towrite > state->written)
1274 send(h->iofile, buf + state->written, size -
1285 WSAGetLastError() == WSAEWOULDBLOCK
1287 yaz_errno() == EWOULDBLOCK
1289 #if EAGAIN != EWOULDBLOCK
1290 || yaz_errno() == EAGAIN
1294 || yaz_errno() == ENOENT /* Sun's sometimes set errno to this value! */
1296 || yaz_errno() == EINPROGRESS
1300 TRC(fprintf(stderr, " Flow control stop\n"));
1301 h->io_pending = CS_WANT_WRITE;
1304 h->cerrno = CSYSERR;
1307 state->written += res;
1308 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
1309 res, state->written, size));
1311 state->towrite = state->written = -1;
1312 TRC(fprintf(stderr, " Ok\n"));
1319 * Returns 1, 0 or -1
1320 * In nonblocking mode, you must call again with same buffer while
1321 * return value is 1.
1323 int ssl_put(COMSTACK h, char *buf, int size)
1326 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
1328 TRC(fprintf(stderr, "ssl_put: size=%d\n", size));
1331 if (state->towrite < 0)
1333 state->towrite = size;
1336 else if (state->towrite != size)
1338 h->cerrno = CSWRONGBUF;
1341 while (state->towrite > state->written)
1344 res = gnutls_record_send(state->session, buf + state->written,
1345 size - state->written);
1348 if (ssl_check_error(h, state, res))
1353 res = SSL_write(state->ssl, buf + state->written,
1354 size - state->written);
1357 if (ssl_check_error(h, state, res))
1362 state->written += res;
1363 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
1364 res, state->written, size));
1366 state->towrite = state->written = -1;
1367 TRC(fprintf(stderr, " Ok\n"));
1372 void tcpip_close(COMSTACK h)
1374 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
1376 TRC(fprintf(stderr, "tcpip_close: h=%p pid=%d\n", h, getpid()));
1377 if (h->iofile != -1)
1381 gnutls_bye(sp->session, GNUTLS_SHUT_WR);
1382 #elif HAVE_OPENSSL_SSL_H
1385 SSL_shutdown(sp->ssl);
1389 closesocket(h->iofile);
1399 gnutls_deinit(sp->session);
1403 assert(sp->cred_ptr->ref > 0);
1405 if (--(sp->cred_ptr->ref) == 0)
1407 TRC(fprintf(stderr, "Removed credentials %p pid=%d\n",
1408 sp->cred_ptr->xcred, getpid()));
1409 gnutls_certificate_free_credentials(sp->cred_ptr->xcred);
1410 xfree(sp->cred_ptr);
1414 #elif HAVE_OPENSSL_SSL_H
1417 TRC(fprintf(stderr, "SSL_free\n"));
1422 SSL_CTX_free(sp->ctx_alloc);
1424 #if HAVE_GETADDRINFO
1426 freeaddrinfo(sp->ai);
1428 xfree(sp->connect_request_buf);
1429 xfree(sp->connect_response_buf);
1434 const char *tcpip_addrstr(COMSTACK h)
1436 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
1437 char *r = 0, *buf = sp->buf;
1439 #if HAVE_GETADDRINFO
1441 struct sockaddr_storage addr;
1442 YAZ_SOCKLEN_T len = sizeof(addr);
1444 if (getpeername(h->iofile, (struct sockaddr *)&addr, &len) < 0)
1446 h->cerrno = CSYSERR;
1449 if (getnameinfo((struct sockaddr *) &addr, len, host, sizeof(host)-1,
1451 (h->flags & CS_FLAGS_NUMERICHOST) ? NI_NUMERICHOST : 0))
1460 struct sockaddr_in addr;
1461 YAZ_SOCKLEN_T len = sizeof(addr);
1462 struct hostent *host;
1464 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
1466 h->cerrno = CSYSERR;
1469 if (!(h->flags & CS_FLAGS_NUMERICHOST))
1471 if ((host = gethostbyaddr((char*)&addr.sin_addr,
1472 sizeof(addr.sin_addr),
1474 r = (char*) host->h_name;
1477 r = inet_ntoa(addr.sin_addr);
1480 if (h->protocol == PROTO_HTTP)
1481 sprintf(buf, "http:%s", r);
1483 sprintf(buf, "tcp:%s", r);
1487 if (h->protocol == PROTO_HTTP)
1488 sprintf(buf, "https:%s", r);
1490 sprintf(buf, "ssl:%s", r);
1492 #elif HAVE_OPENSSL_SSL_H
1495 if (h->protocol == PROTO_HTTP)
1496 sprintf(buf, "https:%s", r);
1498 sprintf(buf, "ssl:%s", r);
1504 static int tcpip_set_blocking(COMSTACK p, int flags)
1509 flag = (flags & CS_FLAGS_BLOCKING) ? 0 : 1;
1510 if (ioctlsocket(p->iofile, FIONBIO, &flag) < 0)
1513 flag = fcntl(p->iofile, F_GETFL, 0);
1514 if (flags & CS_FLAGS_BLOCKING)
1515 flag = flag & ~O_NONBLOCK; /* blocking */
1518 flag = flag | O_NONBLOCK; /* non-blocking */
1519 signal(SIGPIPE, SIG_IGN);
1521 if (fcntl(p->iofile, F_SETFL, flag) < 0)
1530 /* gnutls_x509_crt_print appeared in 1.7.6. Memory leaks were fixed in 1.7.9.
1531 GNUTLS_CRT_PRINT_FULL appeared in 2.4.0. */
1532 #if GNUTLS_VERSION_NUMBER >= 0x020400
1533 #define USE_GNUTLS_X509_CRT_PRINT 1
1535 #define USE_GNUTLS_X509_CRT_PRINT 0
1539 #if USE_GNUTLS_X509_CRT_PRINT
1541 static const char *bin2hex(const void *bin, size_t bin_size)
1543 static char printable[110];
1544 const unsigned char *_bin = bin;
1550 for (i = 0; i < bin_size; i++)
1552 sprintf(print, "%.2x ", _bin[i]);
1558 static void x509_crt_print(gnutls_x509_crt_t cert)
1560 time_t expiration_time, activation_time;
1564 unsigned int algo, bits;
1566 expiration_time = gnutls_x509_crt_get_expiration_time(cert);
1567 activation_time = gnutls_x509_crt_get_activation_time(cert);
1569 printf("\tCertificate is valid since: %s", ctime(&activation_time));
1570 printf("\tCertificate expires: %s", ctime(&expiration_time));
1572 /* Print the serial number of the certificate. */
1573 size = sizeof(serial);
1574 gnutls_x509_crt_get_serial(cert, serial, &size);
1576 printf("\tCertificate serial number: %s\n", bin2hex(serial, size));
1578 /* Extract some of the public key algorithm's parameters
1580 algo = gnutls_x509_crt_get_pk_algorithm(cert, &bits);
1582 printf("Certificate public key: %s", gnutls_pk_algorithm_get_name(algo));
1584 /* Print the version of the X.509 certificate. */
1585 printf("\tCertificate version: #%d\n", gnutls_x509_crt_get_version(cert));
1588 gnutls_x509_crt_get_dn(cert, dn, &size);
1589 printf("\tDN: %s\n", dn);
1592 gnutls_x509_crt_get_issuer_dn(cert, dn, &size);
1593 printf("\tIssuer's DN: %s\n", dn);
1598 void cs_print_session_info(COMSTACK cs)
1601 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1602 if (cs->type == ssl_type && sp->session)
1604 const gnutls_datum_t *cert_list;
1605 unsigned i, cert_list_size;
1606 if (gnutls_certificate_type_get(sp->session) != GNUTLS_CRT_X509)
1608 printf("X509 certificate\n");
1609 cert_list = gnutls_certificate_get_peers(sp->session,
1611 printf("Peer provided %u certificates\n", cert_list_size);
1612 for (i = 0; i < cert_list_size; i++)
1614 gnutls_x509_crt_t cert;
1615 #if USE_GNUTLS_X509_CRT_PRINT
1617 gnutls_datum_t cinfo;
1619 gnutls_x509_crt_init(&cert);
1620 gnutls_x509_crt_import(cert, &cert_list[i], GNUTLS_X509_FMT_DER);
1621 printf("Certificate info %d:\n", i + 1);
1622 #if USE_GNUTLS_X509_CRT_PRINT
1623 ret = gnutls_x509_crt_print(cert, GNUTLS_CRT_PRINT_FULL,
1627 printf("\t%s\n", cinfo.data);
1628 gnutls_free(cinfo.data);
1631 x509_crt_print(cert);
1633 gnutls_x509_crt_deinit(cert);
1637 #elif HAVE_OPENSSL_SSL_H
1638 if (cs->type == ssl_type)
1640 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1641 SSL *ssl = (SSL *) sp->ssl;
1644 X509 *server_cert = SSL_get_peer_certificate(ssl);
1649 BIO *bio = BIO_new(BIO_s_mem());
1651 /* get PEM buffer in memory */
1652 PEM_write_bio_X509(bio, server_cert);
1653 pem_len = BIO_get_mem_data(bio, &pem_buf);
1654 fwrite(pem_buf, pem_len, 1, stdout);
1656 /* print all info on screen .. */
1657 X509_print_fp(stdout, server_cert);
1660 X509_free(server_cert);
1667 void *cs_get_ssl(COMSTACK cs)
1669 #if HAVE_OPENSSL_SSL_H
1670 if (cs && cs->type == ssl_type)
1672 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1679 int cs_set_ssl_ctx(COMSTACK cs, void *ctx)
1682 if (cs && cs->type == ssl_type)
1684 #if HAVE_OPENSSL_SSL_H
1685 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1688 sp->ctx = (SSL_CTX *) ctx;
1696 int cs_set_ssl_certificate_file(COMSTACK cs, const char *fname)
1699 if (cs && cs->type == ssl_type)
1701 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1702 strncpy(sp->cert_fname, fname, sizeof(sp->cert_fname)-1);
1703 sp->cert_fname[sizeof(sp->cert_fname)-1] = '\0';
1710 int cs_get_peer_certificate_x509(COMSTACK cs, char **buf, int *len)
1712 #if HAVE_OPENSSL_SSL_H
1713 SSL *ssl = (SSL *) cs_get_ssl(cs);
1716 X509 *server_cert = SSL_get_peer_certificate(ssl);
1719 BIO *bio = BIO_new(BIO_s_mem());
1721 /* get PEM buffer in memory */
1722 PEM_write_bio_X509(bio, server_cert);
1723 *len = BIO_get_mem_data(bio, &pem_buf);
1724 *buf = (char *) xmalloc(*len);
1725 memcpy(*buf, pem_buf, *len);
1734 static int tcpip_put_connect(COMSTACK h, char *buf, int size)
1736 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
1738 int r = tcpip_put(h, state->connect_request_buf,
1739 state->connect_request_len);
1743 h->f_put = tcpip_put; /* switch to normal tcpip put */
1744 r = tcpip_put(h, buf, size);
1749 static int tcpip_get_connect(COMSTACK h, char **buf, int *bufsize)
1751 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
1754 r = tcpip_get(h, &state->connect_response_buf,
1755 &state->connect_response_len);
1758 /* got the connect response completely */
1759 state->complete = cs_complete_auto; /* switch to normal tcpip get */
1760 h->f_get = tcpip_get;
1761 return tcpip_get(h, buf, bufsize);
1768 * c-file-style: "Stroustrup"
1769 * indent-tabs-mode: nil
1771 * vim: shiftwidth=4 tabstop=8 expandtab