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 sp->complete = cs_complete_auto;
232 sp->connect_request_buf = 0;
233 sp->connect_request_len = 0;
234 sp->connect_response_buf = 0;
235 sp->connect_response_len = 0;
237 TRC(fprintf(stderr, "Created new TCPIP comstack h=%p\n", p));
242 COMSTACK yaz_tcpip_create(int s, int flags, int protocol,
243 const char *connect_host)
245 COMSTACK p = tcpip_type(s, flags, protocol, 0);
250 tcpip_state *sp = (tcpip_state *) p->cprivate;
251 sp->connect_request_buf = (char *) xmalloc(strlen(connect_host) + 30);
252 sprintf(sp->connect_request_buf, "CONNECT %s HTTP/1.0\r\n\r\n",
254 sp->connect_request_len = strlen(sp->connect_request_buf);
255 p->f_put = tcpip_put_connect;
256 p->f_get = tcpip_get_connect;
257 sp->complete = cs_complete_auto_head; /* only want HTTP header */
263 static void tcpip_create_cred(COMSTACK cs)
265 tcpip_state *sp = (tcpip_state *) cs->cprivate;
266 sp->cred_ptr = (struct tcpip_cred_ptr *) xmalloc(sizeof(*sp->cred_ptr));
267 sp->cred_ptr->ref = 1;
268 gnutls_certificate_allocate_credentials(&sp->cred_ptr->xcred);
273 COMSTACK ssl_type(int s, int flags, int protocol, void *vp)
281 p = tcpip_type(s, flags, protocol, 0);
287 sp = (tcpip_state *) p->cprivate;
290 sp->session = (gnutls_session_t) vp;
291 #elif HAVE_OPENSSL_SSL_H
292 sp->ctx = (SSL_CTX *) vp; /* may be NULL */
294 /* note: we don't handle already opened socket in SSL mode - yet */
300 static int ssl_check_error(COMSTACK h, tcpip_state *sp, int res)
302 #if HAVE_OPENSSL_SSL_H
303 int err = SSL_get_error(sp->ssl, res);
304 TRC(fprintf(stderr, "got err=%d\n", err));
305 if (err == SSL_ERROR_WANT_READ)
307 TRC(fprintf(stderr, " -> SSL_ERROR_WANT_READ\n"));
308 h->io_pending = CS_WANT_READ;
311 if (err == SSL_ERROR_WANT_WRITE)
313 TRC(fprintf(stderr, " -> SSL_ERROR_WANT_WRITE\n"));
314 h->io_pending = CS_WANT_WRITE;
318 TRC(fprintf(stderr, "ssl_check_error error=%d fatal=%d msg=%s\n",
320 gnutls_error_is_fatal(res),
321 gnutls_strerror(res)));
322 if (res == GNUTLS_E_AGAIN || res == GNUTLS_E_INTERRUPTED)
324 int dir = gnutls_record_get_direction(sp->session);
325 TRC(fprintf(stderr, " -> incomplete dir=%d\n", dir));
326 h->io_pending = dir ? CS_WANT_WRITE : CS_WANT_READ;
330 h->cerrno = CSERRORSSL;
336 /* resolve using getaddrinfo */
337 struct addrinfo *tcpip_getaddrinfo(const char *str, const char *port,
340 struct addrinfo hints, *res;
345 hints.ai_family = AF_UNSPEC;
346 hints.ai_socktype = SOCK_STREAM;
347 hints.ai_protocol = 0;
348 hints.ai_addrlen = 0;
349 hints.ai_addr = NULL;
350 hints.ai_canonname = NULL;
351 hints.ai_next = NULL;
353 strncpy(host, str, sizeof(host)-1);
354 host[sizeof(host)-1] = 0;
355 if ((p = strchr(host, '/')))
357 if ((p = strrchr(host, ':')))
363 if (!strcmp("@", host))
365 hints.ai_flags = AI_PASSIVE;
366 hints.ai_family = AF_UNSPEC;
367 error = getaddrinfo(0, port, &hints, &res);
370 else if (!strcmp("@4", host))
372 hints.ai_flags = AI_PASSIVE;
373 hints.ai_family = AF_INET;
374 error = getaddrinfo(0, port, &hints, &res);
377 else if (!strcmp("@6", host))
379 hints.ai_flags = AI_PASSIVE;
380 hints.ai_family = AF_INET6;
381 error = getaddrinfo(0, port, &hints, &res);
386 error = getaddrinfo(host, port, &hints, &res);
395 /* gethostbyname .. old systems */
396 int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add,
401 short int port = default_port;
403 unsigned long tmpadd;
407 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
408 add->sin_family = AF_INET;
409 strncpy(buf, str, sizeof(buf)-1);
410 buf[sizeof(buf)-1] = 0;
411 if ((p = strchr(buf, '/')))
413 if ((p = strrchr(buf, ':')))
418 add->sin_port = htons(port);
419 if (!strcmp("@", buf))
421 add->sin_addr.s_addr = INADDR_ANY;
423 else if ((tmpadd = inet_addr(buf)) != -1)
425 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
427 else if ((hp = gethostbyname(buf)))
429 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
430 sizeof(struct in_addr));
438 void *tcpip_straddr(COMSTACK h, const char *str)
440 tcpip_state *sp = (tcpip_state *)h->cprivate;
441 const char *port = "210";
442 struct addrinfo *ai = 0;
444 if (h->protocol == PROTO_HTTP)
446 if (h->type == ssl_type)
455 freeaddrinfo(sp->ai);
456 sp->ai = tcpip_getaddrinfo(str, port, &ipv6_only);
457 if (sp->ai && h->state == CS_ST_UNBND)
460 for (ai = sp->ai; ai; ai = ai->ai_next)
462 if (ai->ai_family == AF_INET6)
464 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
471 for (ai = sp->ai; ai; ai = ai->ai_next)
473 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
482 if (ai->ai_family == AF_INET6 && ipv6_only >= 0 &&
483 setsockopt(h->iofile,
485 IPV6_V6ONLY, &ipv6_only, sizeof(ipv6_only)))
487 if (!tcpip_set_blocking(h, h->flags))
493 void *tcpip_straddr(COMSTACK h, const char *str)
495 tcpip_state *sp = (tcpip_state *)h->cprivate;
497 if (h->protocol == PROTO_HTTP)
499 if (h->type == ssl_type)
507 if (!tcpip_strtoaddr_ex(str, &sp->addr, port))
509 if (h->state == CS_ST_UNBND)
512 s = socket(AF_INET, SOCK_STREAM, 0);
517 if (!tcpip_set_blocking(h, h->flags))
524 int tcpip_more(COMSTACK h)
526 tcpip_state *sp = (tcpip_state *)h->cprivate;
528 return sp->altlen && (*sp->complete)(sp->altbuf, sp->altlen);
532 * connect(2) will block (sometimes) - nothing we can do short of doing
533 * weird things like spawning subprocesses or threading or some weird junk
536 int tcpip_connect(COMSTACK h, void *address)
539 struct addrinfo *ai = (struct addrinfo *) address;
540 tcpip_state *sp = (tcpip_state *)h->cprivate;
542 struct sockaddr_in *add = (struct sockaddr_in *) address;
545 TRC(fprintf(stderr, "tcpip_connect h=%p\n", h));
547 if (h->state != CS_ST_UNBND)
549 h->cerrno = CSOUTSTATE;
553 r = connect(h->iofile, ai->ai_addr, ai->ai_addrlen);
554 freeaddrinfo(sp->ai);
557 r = connect(h->iofile, (struct sockaddr *) add, sizeof(*add));
562 if (WSAGetLastError() == WSAEWOULDBLOCK)
564 h->event = CS_CONNECT;
565 h->state = CS_ST_CONNECTING;
566 h->io_pending = CS_WANT_WRITE;
570 if (yaz_errno() == EINPROGRESS)
572 h->event = CS_CONNECT;
573 h->state = CS_ST_CONNECTING;
574 h->io_pending = CS_WANT_WRITE|CS_WANT_READ;
581 h->event = CS_CONNECT;
582 h->state = CS_ST_CONNECTING;
584 return tcpip_rcvconnect(h);
590 int tcpip_rcvconnect(COMSTACK h)
593 tcpip_state *sp = (tcpip_state *)h->cprivate;
595 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
597 if (h->state == CS_ST_DATAXFER)
599 if (h->state != CS_ST_CONNECTING)
601 h->cerrno = CSOUTSTATE;
605 if (h->type == ssl_type && !sp->session)
607 gnutls_global_init();
608 tcpip_create_cred(h);
609 gnutls_init(&sp->session, GNUTLS_CLIENT);
610 gnutls_set_default_priority(sp->session);
611 gnutls_credentials_set (sp->session, GNUTLS_CRD_CERTIFICATE,
612 sp->cred_ptr->xcred);
613 /* cast to intermediate size_t to avoid GCC warning. */
614 gnutls_transport_set_ptr(sp->session,
615 (gnutls_transport_ptr_t)
620 int res = gnutls_handshake(sp->session);
623 if (ssl_check_error(h, sp, res))
628 #elif HAVE_OPENSSL_SSL_H
629 if (h->type == ssl_type && !sp->ctx)
632 SSL_load_error_strings();
634 sp->ctx = sp->ctx_alloc = SSL_CTX_new(SSLv23_client_method());
637 h->cerrno = CSERRORSSL;
647 sp->ssl = SSL_new(sp->ctx);
648 SSL_set_fd(sp->ssl, h->iofile);
650 res = SSL_connect(sp->ssl);
653 if (ssl_check_error(h, sp, res))
660 h->state = CS_ST_DATAXFER;
664 #define CERTF "ztest.pem"
665 #define KEYF "ztest.pem"
667 static int tcpip_bind(COMSTACK h, void *address, int mode)
670 tcpip_state *sp = (tcpip_state *)h->cprivate;
672 struct addrinfo *ai = (struct addrinfo *) address;
674 struct sockaddr *addr = (struct sockaddr *)address;
683 if (h->type == ssl_type && !sp->session)
686 gnutls_global_init();
688 tcpip_create_cred(h);
690 res = gnutls_certificate_set_x509_key_file(sp->cred_ptr->xcred,
693 GNUTLS_X509_FMT_PEM);
694 if (res != GNUTLS_E_SUCCESS)
696 h->cerrno = CSERRORSSL;
700 #elif HAVE_OPENSSL_SSL_H
701 if (h->type == ssl_type && !sp->ctx)
704 SSL_load_error_strings();
706 sp->ctx = sp->ctx_alloc = SSL_CTX_new(SSLv23_server_method());
709 h->cerrno = CSERRORSSL;
718 res = SSL_CTX_use_certificate_file(sp->ctx, sp->cert_fname,
722 ERR_print_errors_fp(stderr);
725 res = SSL_CTX_use_PrivateKey_file(sp->ctx, sp->cert_fname,
729 ERR_print_errors_fp(stderr);
732 res = SSL_CTX_check_private_key(sp->ctx);
735 ERR_print_errors_fp(stderr);
739 TRC(fprintf(stderr, "ssl_bind\n"));
743 TRC(fprintf(stderr, "tcpip_bind\n"));
746 TRC(fprintf(stderr, "tcpip_bind\n"));
749 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
750 &one, sizeof(one)) < 0)
757 r = bind(h->iofile, ai->ai_addr, ai->ai_addrlen);
758 freeaddrinfo(sp->ai);
761 r = bind(h->iofile, addr, sizeof(struct sockaddr_in));
768 /* Allow a maximum-sized backlog of waiting-to-connect clients */
769 if (mode == CS_SERVER && listen(h->iofile, SOMAXCONN) < 0)
774 h->state = CS_ST_IDLE;
775 h->event = CS_LISTEN;
779 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
780 int (*check_ip)(void *cd, const char *a, int len, int t),
784 /* we don't get peer address on Windows (via accept) */
786 struct sockaddr_in addr;
787 YAZ_SOCKLEN_T len = sizeof(addr);
790 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
791 if (h->state != CS_ST_IDLE)
793 h->cerrno = CSOUTSTATE;
797 h->newfd = accept(h->iofile, 0, 0);
799 h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len);
805 WSAGetLastError() == WSAEWOULDBLOCK
807 yaz_errno() == EWOULDBLOCK
809 #if EAGAIN != EWOULDBLOCK
810 || yaz_errno() == EAGAIN
815 h->cerrno = CSNODATA;
819 shutdown(h->iofile, SD_RECEIVE);
821 shutdown(h->iofile, SHUT_RD);
823 listen(h->iofile, SOMAXCONN);
832 if (addrlen && (size_t) (*addrlen) >= sizeof(struct sockaddr_in))
833 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
836 if (check_ip && (*check_ip)(cd, (const char *) &addr,
837 sizeof(addr), AF_INET))
841 closesocket(h->newfd);
849 h->state = CS_ST_INCON;
853 COMSTACK tcpip_accept(COMSTACK h)
857 unsigned long tru = 1;
860 TRC(fprintf(stderr, "tcpip_accept h=%p pid=%d\n", h, getpid()));
861 if (h->state == CS_ST_INCON)
863 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
864 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
868 closesocket(h->newfd);
875 memcpy(cnew, h, sizeof(*h));
876 cnew->iofile = h->newfd;
877 cnew->io_pending = 0;
879 if (!(state = (tcpip_state *)
880 (cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
886 closesocket(h->newfd);
894 if (!tcpip_set_blocking(cnew, cnew->flags))
900 closesocket(h->newfd);
912 state->altsize = state->altlen = 0;
913 state->towrite = state->written = -1;
914 state->complete = st->complete;
918 cnew->state = CS_ST_ACCEPT;
919 h->state = CS_ST_IDLE;
922 state->cred_ptr = st->cred_ptr;
928 (state->cred_ptr->ref)++;
929 gnutls_init(&state->session, GNUTLS_SERVER);
936 res = gnutls_set_default_priority(state->session);
937 if (res != GNUTLS_E_SUCCESS)
943 res = gnutls_credentials_set(state->session,
944 GNUTLS_CRD_CERTIFICATE,
945 st->cred_ptr->xcred);
946 if (res != GNUTLS_E_SUCCESS)
952 /* cast to intermediate size_t to avoid GCC warning. */
953 gnutls_transport_set_ptr(state->session,
954 (gnutls_transport_ptr_t)
955 (size_t) cnew->iofile);
957 #elif HAVE_OPENSSL_SSL_H
958 state->ctx = st->ctx;
959 state->ctx_alloc = 0;
960 state->ssl = st->ssl;
963 state->ssl = SSL_new(state->ctx);
964 SSL_set_fd(state->ssl, cnew->iofile);
967 state->connect_request_buf = 0;
968 state->connect_response_buf = 0;
971 if (h->state == CS_ST_ACCEPT)
974 tcpip_state *state = (tcpip_state *)h->cprivate;
977 int res = gnutls_handshake(state->session);
980 if (ssl_check_error(h, state, res))
982 TRC(fprintf(stderr, "gnutls_handshake int in tcpip_accept\n"));
985 TRC(fprintf(stderr, "gnutls_handshake failed in tcpip_accept\n"));
989 TRC(fprintf(stderr, "SSL_accept complete. gnutls\n"));
991 #elif HAVE_OPENSSL_SSL_H
992 tcpip_state *state = (tcpip_state *)h->cprivate;
997 res = SSL_accept(state->ssl);
998 TRC(fprintf(stderr, "SSL_accept res=%d\n", res));
1001 if (ssl_check_error(h, state, res))
1008 TRC(fprintf(stderr, "SSL_accept complete\n"));
1014 h->cerrno = CSOUTSTATE;
1018 h->state = CS_ST_DATAXFER;
1023 #define CS_TCPIP_BUFCHUNK 4096
1026 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
1027 * 0=connection closed.
1029 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
1031 tcpip_state *sp = (tcpip_state *)h->cprivate;
1033 int tmpi, berlen, rest, req, tomove;
1034 int hasread = 0, res;
1036 TRC(fprintf(stderr, "tcpip_get: h=%p bufsize=%d\n", h, *bufsize));
1037 if (sp->altlen) /* switch buffers */
1039 TRC(fprintf(stderr, " %d bytes in altbuf (%p)\n", sp->altlen,
1044 *bufsize = sp->altsize;
1045 hasread = sp->altlen;
1051 while (!(berlen = (*sp->complete)(*buf, hasread)))
1055 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
1057 h->cerrno = CSYSERR;
1061 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
1062 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
1064 h->cerrno = CSYSERR;
1069 /* unfortunatly, sun sometimes forgets to set errno in recv
1070 when EWOULDBLOCK etc. would be required (res = -1) */
1072 res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0);
1073 TRC(fprintf(stderr, " recv res=%d, hasread=%d\n", res, hasread));
1076 TRC(fprintf(stderr, " recv errno=%d, (%s)\n", yaz_errno(),
1077 strerror(yaz_errno())));
1079 if (WSAGetLastError() == WSAEWOULDBLOCK)
1081 h->io_pending = CS_WANT_READ;
1086 h->cerrno = CSYSERR;
1090 if (yaz_errno() == EWOULDBLOCK
1092 #if EAGAIN != EWOULDBLOCK
1093 || yaz_errno() == EAGAIN
1096 || yaz_errno() == EINPROGRESS
1098 || yaz_errno() == ENOENT /* Sun's sometimes set errno to this */
1102 h->io_pending = CS_WANT_READ;
1105 else if (yaz_errno() == 0)
1109 h->cerrno = CSYSERR;
1117 if (hasread > h->max_recv_bytes)
1119 h->cerrno = CSBUFSIZE;
1123 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
1125 /* move surplus buffer (or everything if we didn't get a BER rec.) */
1126 if (hasread > berlen)
1128 tomove = req = hasread - berlen;
1129 rest = tomove % CS_TCPIP_BUFCHUNK;
1131 req += CS_TCPIP_BUFCHUNK - rest;
1134 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
1136 h->cerrno = CSYSERR;
1139 } else if (sp->altsize < req)
1140 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
1142 h->cerrno = CSYSERR;
1145 TRC(fprintf(stderr, " Moving %d bytes to altbuf(%p)\n", tomove,
1147 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
1149 if (berlen < CS_TCPIP_BUFCHUNK - 1)
1150 *(*buf + berlen) = '\0';
1151 return berlen ? berlen : 1;
1157 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
1158 * 0=connection closed.
1160 int ssl_get(COMSTACK h, char **buf, int *bufsize)
1162 tcpip_state *sp = (tcpip_state *)h->cprivate;
1164 int tmpi, berlen, rest, req, tomove;
1165 int hasread = 0, res;
1167 TRC(fprintf(stderr, "ssl_get: bufsize=%d\n", *bufsize));
1168 if (sp->altlen) /* switch buffers */
1170 TRC(fprintf(stderr, " %d bytes in altbuf (%p)\n", sp->altlen,
1175 *bufsize = sp->altsize;
1176 hasread = sp->altlen;
1182 while (!(berlen = (*sp->complete)(*buf, hasread)))
1186 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
1189 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
1190 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
1193 res = gnutls_record_recv(sp->session, *buf + hasread,
1197 TRC(fprintf(stderr, "gnutls_record_recv returned 0\n"));
1202 if (ssl_check_error(h, sp, res))
1207 res = SSL_read(sp->ssl, *buf + hasread, CS_TCPIP_BUFCHUNK);
1208 TRC(fprintf(stderr, " SSL_read res=%d, hasread=%d\n", res, hasread));
1211 if (ssl_check_error(h, sp, res))
1218 TRC (fprintf (stderr, " Out of read loop with hasread=%d, berlen=%d\n",
1220 /* move surplus buffer (or everything if we didn't get a BER rec.) */
1221 if (hasread > berlen)
1223 tomove = req = hasread - berlen;
1224 rest = tomove % CS_TCPIP_BUFCHUNK;
1226 req += CS_TCPIP_BUFCHUNK - rest;
1229 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
1231 } else if (sp->altsize < req)
1232 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
1234 TRC(fprintf(stderr, " Moving %d bytes to altbuf(%p)\n", tomove,
1236 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
1238 if (berlen < CS_TCPIP_BUFCHUNK - 1)
1239 *(*buf + berlen) = '\0';
1240 return berlen ? berlen : 1;
1245 * Returns 1, 0 or -1
1246 * In nonblocking mode, you must call again with same buffer while
1247 * return value is 1.
1249 int tcpip_put(COMSTACK h, char *buf, int size)
1252 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
1254 TRC(fprintf(stderr, "tcpip_put: h=%p size=%d\n", h, size));
1257 if (state->towrite < 0)
1259 state->towrite = size;
1262 else if (state->towrite != size)
1264 h->cerrno = CSWRONGBUF;
1267 while (state->towrite > state->written)
1270 send(h->iofile, buf + state->written, size -
1281 WSAGetLastError() == WSAEWOULDBLOCK
1283 yaz_errno() == EWOULDBLOCK
1285 #if EAGAIN != EWOULDBLOCK
1286 || yaz_errno() == EAGAIN
1290 || yaz_errno() == ENOENT /* Sun's sometimes set errno to this value! */
1292 || yaz_errno() == EINPROGRESS
1296 TRC(fprintf(stderr, " Flow control stop\n"));
1297 h->io_pending = CS_WANT_WRITE;
1300 h->cerrno = CSYSERR;
1303 state->written += res;
1304 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
1305 res, state->written, size));
1307 state->towrite = state->written = -1;
1308 TRC(fprintf(stderr, " Ok\n"));
1315 * Returns 1, 0 or -1
1316 * In nonblocking mode, you must call again with same buffer while
1317 * return value is 1.
1319 int ssl_put(COMSTACK h, char *buf, int size)
1322 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
1324 TRC(fprintf(stderr, "ssl_put: size=%d\n", size));
1327 if (state->towrite < 0)
1329 state->towrite = size;
1332 else if (state->towrite != size)
1334 h->cerrno = CSWRONGBUF;
1337 while (state->towrite > state->written)
1340 res = gnutls_record_send(state->session, buf + state->written,
1341 size - state->written);
1344 if (ssl_check_error(h, state, res))
1349 res = SSL_write(state->ssl, buf + state->written,
1350 size - state->written);
1353 if (ssl_check_error(h, state, res))
1358 state->written += res;
1359 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
1360 res, state->written, size));
1362 state->towrite = state->written = -1;
1363 TRC(fprintf(stderr, " Ok\n"));
1368 void tcpip_close(COMSTACK h)
1370 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
1372 TRC(fprintf(stderr, "tcpip_close: h=%p pid=%d\n", h, getpid()));
1373 if (h->iofile != -1)
1377 gnutls_bye(sp->session, GNUTLS_SHUT_WR);
1378 #elif HAVE_OPENSSL_SSL_H
1381 SSL_shutdown(sp->ssl);
1385 closesocket(h->iofile);
1395 gnutls_deinit(sp->session);
1399 assert(sp->cred_ptr->ref > 0);
1401 if (--(sp->cred_ptr->ref) == 0)
1403 TRC(fprintf(stderr, "Removed credentials %p pid=%d\n",
1404 sp->cred_ptr->xcred, getpid()));
1405 gnutls_certificate_free_credentials(sp->cred_ptr->xcred);
1406 xfree(sp->cred_ptr);
1410 #elif HAVE_OPENSSL_SSL_H
1413 TRC(fprintf(stderr, "SSL_free\n"));
1418 SSL_CTX_free(sp->ctx_alloc);
1420 #if HAVE_GETADDRINFO
1422 freeaddrinfo(sp->ai);
1424 xfree(sp->connect_request_buf);
1425 xfree(sp->connect_response_buf);
1430 const char *tcpip_addrstr(COMSTACK h)
1432 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
1433 char *r = 0, *buf = sp->buf;
1435 #if HAVE_GETADDRINFO
1437 struct sockaddr_storage addr;
1438 YAZ_SOCKLEN_T len = sizeof(addr);
1440 if (getpeername(h->iofile, (struct sockaddr *)&addr, &len) < 0)
1442 h->cerrno = CSYSERR;
1445 if (getnameinfo((struct sockaddr *) &addr, len, host, sizeof(host)-1,
1447 (h->flags & CS_FLAGS_NUMERICHOST) ? NI_NUMERICHOST : 0))
1456 struct sockaddr_in addr;
1457 YAZ_SOCKLEN_T len = sizeof(addr);
1458 struct hostent *host;
1460 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
1462 h->cerrno = CSYSERR;
1465 if (!(h->flags & CS_FLAGS_NUMERICHOST))
1467 if ((host = gethostbyaddr((char*)&addr.sin_addr,
1468 sizeof(addr.sin_addr),
1470 r = (char*) host->h_name;
1473 r = inet_ntoa(addr.sin_addr);
1476 if (h->protocol == PROTO_HTTP)
1477 sprintf(buf, "http:%s", r);
1479 sprintf(buf, "tcp:%s", r);
1483 if (h->protocol == PROTO_HTTP)
1484 sprintf(buf, "https:%s", r);
1486 sprintf(buf, "ssl:%s", r);
1488 #elif HAVE_OPENSSL_SSL_H
1491 if (h->protocol == PROTO_HTTP)
1492 sprintf(buf, "https:%s", r);
1494 sprintf(buf, "ssl:%s", r);
1500 static int tcpip_set_blocking(COMSTACK p, int flags)
1505 flag = (flags & CS_FLAGS_BLOCKING) ? 0 : 1;
1506 if (ioctlsocket(p->iofile, FIONBIO, &flag) < 0)
1509 flag = fcntl(p->iofile, F_GETFL, 0);
1510 if (flags & CS_FLAGS_BLOCKING)
1511 flag = flag & ~O_NONBLOCK; /* blocking */
1514 flag = flag | O_NONBLOCK; /* non-blocking */
1515 signal(SIGPIPE, SIG_IGN);
1517 if (fcntl(p->iofile, F_SETFL, flag) < 0)
1526 /* gnutls_x509_crt_print appeared in 1.7.6. Memory leaks were fixed in 1.7.9.
1527 GNUTLS_CRT_PRINT_FULL appeared in 2.4.0. */
1528 #if GNUTLS_VERSION_NUMBER >= 0x020400
1529 #define USE_GNUTLS_X509_CRT_PRINT 1
1531 #define USE_GNUTLS_X509_CRT_PRINT 0
1535 #if USE_GNUTLS_X509_CRT_PRINT
1537 static const char *bin2hex(const void *bin, size_t bin_size)
1539 static char printable[110];
1540 const unsigned char *_bin = bin;
1546 for (i = 0; i < bin_size; i++)
1548 sprintf(print, "%.2x ", _bin[i]);
1554 static void x509_crt_print(gnutls_x509_crt_t cert)
1556 time_t expiration_time, activation_time;
1560 unsigned int algo, bits;
1562 expiration_time = gnutls_x509_crt_get_expiration_time(cert);
1563 activation_time = gnutls_x509_crt_get_activation_time(cert);
1565 printf("\tCertificate is valid since: %s", ctime(&activation_time));
1566 printf("\tCertificate expires: %s", ctime(&expiration_time));
1568 /* Print the serial number of the certificate. */
1569 size = sizeof(serial);
1570 gnutls_x509_crt_get_serial(cert, serial, &size);
1572 printf("\tCertificate serial number: %s\n", bin2hex(serial, size));
1574 /* Extract some of the public key algorithm's parameters
1576 algo = gnutls_x509_crt_get_pk_algorithm(cert, &bits);
1578 printf("Certificate public key: %s", gnutls_pk_algorithm_get_name(algo));
1580 /* Print the version of the X.509 certificate. */
1581 printf("\tCertificate version: #%d\n", gnutls_x509_crt_get_version(cert));
1584 gnutls_x509_crt_get_dn(cert, dn, &size);
1585 printf("\tDN: %s\n", dn);
1588 gnutls_x509_crt_get_issuer_dn(cert, dn, &size);
1589 printf("\tIssuer's DN: %s\n", dn);
1594 void cs_print_session_info(COMSTACK cs)
1597 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1598 if (cs->type == ssl_type && sp->session)
1600 const gnutls_datum_t *cert_list;
1601 unsigned i, cert_list_size;
1602 if (gnutls_certificate_type_get(sp->session) != GNUTLS_CRT_X509)
1604 printf("X509 certificate\n");
1605 cert_list = gnutls_certificate_get_peers(sp->session,
1607 printf("Peer provided %u certificates\n", cert_list_size);
1608 for (i = 0; i < cert_list_size; i++)
1610 gnutls_x509_crt_t cert;
1611 #if USE_GNUTLS_X509_CRT_PRINT
1613 gnutls_datum_t cinfo;
1615 gnutls_x509_crt_init(&cert);
1616 gnutls_x509_crt_import(cert, &cert_list[i], GNUTLS_X509_FMT_DER);
1617 printf("Certificate info %d:\n", i + 1);
1618 #if USE_GNUTLS_X509_CRT_PRINT
1619 ret = gnutls_x509_crt_print(cert, GNUTLS_CRT_PRINT_FULL,
1623 printf("\t%s\n", cinfo.data);
1624 gnutls_free(cinfo.data);
1627 x509_crt_print(cert);
1629 gnutls_x509_crt_deinit(cert);
1633 #elif HAVE_OPENSSL_SSL_H
1634 if (cs->type == ssl_type)
1636 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1637 SSL *ssl = (SSL *) sp->ssl;
1640 X509 *server_cert = SSL_get_peer_certificate(ssl);
1645 BIO *bio = BIO_new(BIO_s_mem());
1647 /* get PEM buffer in memory */
1648 PEM_write_bio_X509(bio, server_cert);
1649 pem_len = BIO_get_mem_data(bio, &pem_buf);
1650 fwrite(pem_buf, pem_len, 1, stdout);
1652 /* print all info on screen .. */
1653 X509_print_fp(stdout, server_cert);
1656 X509_free(server_cert);
1663 void *cs_get_ssl(COMSTACK cs)
1665 #if HAVE_OPENSSL_SSL_H
1666 if (cs && cs->type == ssl_type)
1668 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1675 int cs_set_ssl_ctx(COMSTACK cs, void *ctx)
1678 if (cs && cs->type == ssl_type)
1680 #if HAVE_OPENSSL_SSL_H
1681 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1684 sp->ctx = (SSL_CTX *) ctx;
1692 int cs_set_ssl_certificate_file(COMSTACK cs, const char *fname)
1695 if (cs && cs->type == ssl_type)
1697 struct tcpip_state *sp = (struct tcpip_state *) cs->cprivate;
1698 strncpy(sp->cert_fname, fname, sizeof(sp->cert_fname)-1);
1699 sp->cert_fname[sizeof(sp->cert_fname)-1] = '\0';
1706 int cs_get_peer_certificate_x509(COMSTACK cs, char **buf, int *len)
1708 #if HAVE_OPENSSL_SSL_H
1709 SSL *ssl = (SSL *) cs_get_ssl(cs);
1712 X509 *server_cert = SSL_get_peer_certificate(ssl);
1715 BIO *bio = BIO_new(BIO_s_mem());
1717 /* get PEM buffer in memory */
1718 PEM_write_bio_X509(bio, server_cert);
1719 *len = BIO_get_mem_data(bio, &pem_buf);
1720 *buf = (char *) xmalloc(*len);
1721 memcpy(*buf, pem_buf, *len);
1730 static int tcpip_put_connect(COMSTACK h, char *buf, int size)
1732 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
1734 int r = tcpip_put(h, state->connect_request_buf,
1735 state->connect_request_len);
1739 h->f_put = tcpip_put; /* switch to normal tcpip put */
1740 r = tcpip_put(h, buf, size);
1745 static int tcpip_get_connect(COMSTACK h, char **buf, int *bufsize)
1747 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
1750 r = tcpip_get(h, &state->connect_response_buf,
1751 &state->connect_response_len);
1754 /* got the connect response completely */
1755 state->complete = cs_complete_auto; /* switch to normal tcpip get */
1756 h->f_get = tcpip_get;
1757 return tcpip_get(h, buf, bufsize);
1764 * c-file-style: "Stroustrup"
1765 * indent-tabs-mode: nil
1767 * vim: shiftwidth=4 tabstop=8 expandtab