X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=comstack%2Ftcpip.c;h=639fd72180df84dc54b9210aa7f2356999701b6b;hp=3c09d9ea1eae14e6309d4102e94457a3b0f0c589;hb=d9ee01635f03f9095a66f71b73580560d48798e8;hpb=8df01d1889fa540918519fa5fb00fa0afd82b67a diff --git a/comstack/tcpip.c b/comstack/tcpip.c index 3c09d9e..639fd72 100644 --- a/comstack/tcpip.c +++ b/comstack/tcpip.c @@ -1,10 +1,82 @@ /* - * Copyright (c) 1995, Index Data + * Copyright (c) 1995-1999, Index Data * See the file LICENSE for details. * Sebastian Hammer, Adam Dickmeiss * * $Log: tcpip.c,v $ - * Revision 1.10 1996-02-20 12:52:11 quinn + * Revision 1.32 1999-11-30 13:47:11 adam + * Improved installation. Moved header files to include/yaz. + * + * Revision 1.31 1999/04/29 07:31:23 adam + * Changed tcpip_strtoaddr_ex so that only part 'till '/' is considered + * part of hostname. + * + * Revision 1.30 1999/04/20 09:56:48 adam + * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun). + * Modified all encoders/decoders to reflect this change. + * + * Revision 1.29 1999/04/16 14:45:55 adam + * Added interface for tcpd wrapper for access control. + * + * Revision 1.28 1999/03/31 11:11:14 adam + * Function getprotobyname only called once. Minor change in tcpip_get + * to handle multi-threaded conditions. + * + * Revision 1.27 1999/02/02 13:57:31 adam + * Uses preprocessor define WIN32 instead of WINDOWS to build code + * for Microsoft WIN32. + * + * Revision 1.26 1999/01/08 11:23:14 adam + * Added const modifier to some of the BER/ODR encoding routines. + * + * Revision 1.25 1998/07/07 15:49:23 adam + * Added braces to avoid warning. + * + * Revision 1.24 1998/06/29 07:59:17 adam + * Minor fix. + * + * Revision 1.23 1998/06/23 15:37:50 adam + * Added type cast to prevent warning. + * + * Revision 1.22 1998/06/22 11:32:36 adam + * Added 'conditional cs_listen' feature. + * + * Revision 1.21 1998/05/20 09:55:32 adam + * Function tcpip_get treats EINPROGRESS error in the same way as + * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on + * Solaris in some cases. + * + * Revision 1.20 1998/05/18 10:10:40 adam + * Minor change to avoid C++ warning. + * + * Revision 1.19 1998/02/11 11:53:33 adam + * Changed code so that it compiles as C++. + * + * Revision 1.18 1997/09/29 07:15:25 adam + * Changed use of setsockopt to avoid warnings on MSVC. + * + * Revision 1.17 1997/09/17 12:10:30 adam + * YAZ version 1.4. + * + * Revision 1.16 1997/09/01 08:49:14 adam + * New windows NT/95 port using MSV5.0. Minor changes only. + * + * Revision 1.15 1997/05/14 06:53:33 adam + * C++ support. + * + * Revision 1.14 1997/05/01 15:06:32 adam + * Moved WINSOCK init. code to tcpip_init routine. + * + * Revision 1.13 1996/11/01 08:45:18 adam + * Bug fix: used close on MS-Windows. Fixed to closesocket. + * + * Revision 1.12 1996/07/06 19:58:30 quinn + * System headerfiles gathered in yconfig + * + * Revision 1.11 1996/02/23 10:00:39 quinn + * WAIS Work + * + * Revision 1.10 1996/02/20 12:52:11 quinn * WAIS protocol support. * * Revision 1.9 1996/02/10 12:23:11 quinn @@ -103,16 +175,18 @@ #include #include #include +#ifndef WIN32 #include +#endif #include #include -#include -#include +#include +#include +#include -#ifndef WINDOWS -#include -#endif +/* Chas added the following, so we get the definition of completeBER */ +#include int tcpip_close(COMSTACK h); int tcpip_put(COMSTACK h, char *buf, int size); @@ -121,24 +195,21 @@ int tcpip_connect(COMSTACK h, void *address); int tcpip_more(COMSTACK h); int tcpip_rcvconnect(COMSTACK h); int tcpip_bind(COMSTACK h, void *address, int mode); -int tcpip_listen(COMSTACK h, char *addrp, int *addrlen); +int tcpip_listen(COMSTACK h, char *raddr, int *addrlen, + int (*check_ip)(void *cd, const char *a, int len, int type), + void *cd); + COMSTACK tcpip_accept(COMSTACK h); char *tcpip_addrstr(COMSTACK h); +void *tcpip_straddr(COMSTACK h, const char *str); -/* - * Determine length/completeness of incoming packages - */ -int completeBER(unsigned char *buf, int len); /* from the ODR module */ -int completeWAIS(unsigned char *buf, int len); /* from waislen.c */ - +#undef TRACE_TCPIP #ifdef TRACE_TCPIP #define TRC(x) x #else #define TRC(X) #endif -static int initialized = 0; - typedef struct tcpip_state { char *altbuf; /* alternate buffer for surplus data */ @@ -147,56 +218,76 @@ typedef struct tcpip_state int written; /* -1 if we aren't writing */ int towrite; /* to verify against user input */ - int (*complete)(unsigned char *buf, int len); /* length/completeness */ + int (*complete)(const unsigned char *buf, int len); /* length/comple. */ + struct sockaddr_in addr; /* returned by cs_straddr */ + char buf[128]; /* returned by cs_addrstr */ } tcpip_state; -/* - * s >= 0: socket has already been established for us. - */ -COMSTACK tcpip_type(int s, int blocking, int protocol) +#ifdef WIN32 +static int tcpip_init (void) { - COMSTACK p; - tcpip_state *state; - int new_socket; -#ifdef WINDOWS - unsigned long tru = 1; -#else - struct protoent *proto; -#endif - + static int initialized = 0; if (!initialized) { -#ifdef WINDOWS WORD requested; WSADATA wd; requested = MAKEWORD(1, 1); if (WSAStartup(requested, &wd)) return 0; -#endif initialized = 1; } + return 1; +} +#else + +static int proto_number = 0; +static int tcpip_init (void) +{ + struct protoent *proto; + /* only call getprotobyname once, in case it allocates memory */ + if (!(proto = getprotobyname("tcp"))) + return 0; + proto_number = proto->p_proto; + return 1; +} +#endif +/* + * This function is always called through the cs_create() macro. + * s >= 0: socket has already been established for us. + */ +COMSTACK tcpip_type(int s, int blocking, int protocol) +{ + COMSTACK p; + tcpip_state *state; + int new_socket; +#ifdef WIN32 + unsigned long tru = 1; +#endif + + if (!tcpip_init ()) + return 0; if (s < 0) { -#ifndef WINDOWS - if (!(proto = getprotobyname("tcp"))) +#ifdef WIN32 + if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) return 0; - if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0) #else - if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) -#endif + if ((s = socket(AF_INET, SOCK_STREAM, proto_number)) < 0) return 0; +#endif new_socket = 1; } else new_socket = 0; - if (!(p = xmalloc(sizeof(struct comstack)))) + if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack)))) return 0; - if (!(state = p->private = xmalloc(sizeof(tcpip_state)))) + if (!(state = (struct tcpip_state *)(p->cprivate = + xmalloc(sizeof(tcpip_state))))) return 0; -#ifdef WINDOWS +#ifdef WIN32 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0) #else if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0) @@ -205,7 +296,7 @@ COMSTACK tcpip_type(int s, int blocking, int protocol) p->iofile = s; p->type = tcpip_type; - p->protocol = protocol; + p->protocol = (enum oid_proto) protocol; p->f_connect = tcpip_connect; p->f_rcvconnect = tcpip_rcvconnect; @@ -217,6 +308,7 @@ COMSTACK tcpip_type(int s, int blocking, int protocol) p->f_listen = tcpip_listen; p->f_accept = tcpip_accept; p->f_addrstr = tcpip_addrstr; + p->f_straddr = tcpip_straddr; p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */ p->event = CS_NONE; @@ -237,39 +329,63 @@ COMSTACK tcpip_type(int s, int blocking, int protocol) return p; } -struct sockaddr_in *tcpip_strtoaddr(const char *str) +int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add) { - static struct sockaddr_in add; struct hostent *hp; char *p, buf[512]; short int port = 210; unsigned tmpadd; + if (!tcpip_init ()) + return 0; TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL")); - add.sin_family = AF_INET; - strcpy(buf, str); + add->sin_family = AF_INET; + strncpy(buf, str, 511); + buf[511] = 0; + if ((p = strchr(buf, '/'))) + *p = 0; if ((p = strchr(buf, ':'))) { *p = 0; port = atoi(p + 1); } - add.sin_port = htons(port); + add->sin_port = htons(port); if (!strcmp("@", buf)) - add.sin_addr.s_addr = INADDR_ANY; + add->sin_addr.s_addr = INADDR_ANY; else if ((hp = gethostbyname(buf))) - memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr)); + memcpy(&add->sin_addr.s_addr, *hp->h_addr_list, + sizeof(struct in_addr)); else if ((tmpadd = (unsigned) inet_addr(buf)) != 0) - memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr)); + memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr)); else return 0; + return 1; +} + +void *tcpip_straddr(COMSTACK h, const char *str) +{ + tcpip_state *sp = (tcpip_state *)h->cprivate; + + if (!tcpip_strtoaddr_ex (str, &sp->addr)) + return 0; + return &sp->addr; +} + +struct sockaddr_in *tcpip_strtoaddr(const char *str) +{ + static struct sockaddr_in add; + + if (!tcpip_strtoaddr_ex (str, &add)) + return 0; return &add; } int tcpip_more(COMSTACK h) { - tcpip_state *sp = h->private; - - return sp->altlen && completeBER((unsigned char *) sp->altbuf, sp->altlen); + tcpip_state *sp = (tcpip_state *)h->cprivate; + + return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf, + sp->altlen); } /* @@ -279,12 +395,12 @@ int tcpip_more(COMSTACK h) */ int tcpip_connect(COMSTACK h, void *address) { - struct sockaddr_in *add = address; + struct sockaddr_in *add = (struct sockaddr_in *)address; TRC(fprintf(stderr, "tcpip_connect\n")); if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0) { -#ifdef WINDOWS +#ifdef WIN32 if (WSAGetLastError() == WSAEWOULDBLOCK) #else if (errno == EINPROGRESS) @@ -307,11 +423,16 @@ int tcpip_rcvconnect(COMSTACK h) int tcpip_bind(COMSTACK h, void *address, int mode) { - struct sockaddr *addr = address; + struct sockaddr *addr = (struct sockaddr *)address; +#ifdef WIN32 + BOOL one = 1; +#else unsigned long one = 1; +#endif TRC(fprintf(stderr, "tcpip_bind\n")); - if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0) + if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*) + &one, sizeof(one)) < 0) { h->cerrno = CSYSERR; return -1; @@ -330,12 +451,14 @@ int tcpip_bind(COMSTACK h, void *address, int mode) return 0; } -int tcpip_listen(COMSTACK h, char *raddr, int *addrlen) +int tcpip_listen(COMSTACK h, char *raddr, int *addrlen, + int (*check_ip)(void *cd, const char *a, int len, int t), + void *cd) { struct sockaddr_in addr; int len = sizeof(addr); - TRC(fprintf(stderr, "tcpip_listen\n")); + TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid())); if (h->state != CS_IDLE) { h->cerrno = CSOUTSTATE; @@ -343,7 +466,7 @@ int tcpip_listen(COMSTACK h, char *raddr, int *addrlen) } if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0) { -#ifdef WINDOWS +#ifdef WIN32 if (WSAGetLastError() == WSAEWOULDBLOCK) #else if (errno == EWOULDBLOCK) @@ -354,19 +477,30 @@ int tcpip_listen(COMSTACK h, char *raddr, int *addrlen) h->cerrno = CSYSERR; return -1; } - if (addrlen && *addrlen > sizeof(struct sockaddr_in)) + if (addrlen && (size_t) (*addrlen) >= sizeof(struct sockaddr_in)) memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in)); else if (addrlen) *addrlen = 0; + if (check_ip && (*check_ip)(cd, (const char *) &addr, + sizeof(addr), AF_INET)) + { + h->cerrno = CSDENY; +#ifdef WIN32 + closesocket(h->newfd); +#else + close(h->newfd); +#endif + return -1; + } h->state = CS_INCON; return 0; } COMSTACK tcpip_accept(COMSTACK h) { - COMSTACK new; - tcpip_state *state; -#ifdef WINDOWS + COMSTACK cnew; + tcpip_state *state, *st = (tcpip_state *)h->cprivate; +#ifdef WIN32 unsigned long tru = 1; #endif @@ -376,30 +510,32 @@ COMSTACK tcpip_accept(COMSTACK h) h->cerrno = CSOUTSTATE; return 0; } - if (!(new = xmalloc(sizeof(*new)))) + if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew)))) { h->cerrno = CSYSERR; return 0; } - memcpy(new, h, sizeof(*h)); - new->iofile = h->newfd; - if (!(state = new->private = xmalloc(sizeof(tcpip_state)))) + memcpy(cnew, h, sizeof(*h)); + cnew->iofile = h->newfd; + if (!(state = (tcpip_state *) + (cnew->cprivate = xmalloc(sizeof(tcpip_state))))) { h->cerrno = CSYSERR; return 0; } -#ifdef WINDOWS - if (!new->blocking && ioctlsocket(new->iofile, FIONBIO, &tru) < 0) +#ifdef WIN32 + if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0) #else - if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0) + if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0) #endif return 0; state->altbuf = 0; state->altsize = state->altlen = 0; state->towrite = state->written = -1; - new->state = CS_DATAXFER; + state->complete = st->complete; + cnew->state = CS_DATAXFER; h->state = CS_IDLE; - return new; + return cnew; } #define CS_TCPIP_BUFCHUNK 4096 @@ -410,7 +546,7 @@ COMSTACK tcpip_accept(COMSTACK h) */ int tcpip_get(COMSTACK h, char **buf, int *bufsize) { - tcpip_state *sp = h->private; + tcpip_state *sp = (tcpip_state *)h->cprivate; char *tmpc; int tmpi, berlen, rest, req, tomove; int hasread = 0, res; @@ -429,25 +565,36 @@ int tcpip_get(COMSTACK h, char **buf, int *bufsize) sp->altbuf = tmpc; sp->altsize = tmpi; } - while (!(berlen = completeBER((unsigned char *)*buf, hasread))) + while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread))) { if (!*bufsize) { - if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK))) + if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK))) return -1; } else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK) - if (!(*buf =xrealloc(*buf, *bufsize *= 2))) + if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2))) return -1; if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0) -#ifdef WINDOWS + { +#ifdef WIN32 if (WSAGetLastError() == WSAEWOULDBLOCK) + break; + else + return -1; #else - if (errno == EWOULDBLOCK) + if (errno == EWOULDBLOCK +#ifdef EINPROGRESS + || errno == EINPROGRESS #endif - break; - else + ) + break; + else if (errno == 0) + continue; + else return -1; +#endif + } if (!res) return 0; hasread += res; @@ -464,10 +611,10 @@ int tcpip_get(COMSTACK h, char **buf, int *bufsize) req += CS_TCPIP_BUFCHUNK - rest; if (!sp->altbuf) { - if (!(sp->altbuf = xmalloc(sp->altsize = req))) + if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req))) return -1; } else if (sp->altsize < req) - if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req))) + if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req))) return -1; TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove, (unsigned) sp->altbuf)); @@ -486,7 +633,7 @@ int tcpip_get(COMSTACK h, char **buf, int *bufsize) int tcpip_put(COMSTACK h, char *buf, int size) { int res; - struct tcpip_state *state = h->private; + struct tcpip_state *state = (struct tcpip_state *)h->cprivate; TRC(fprintf(stderr, "tcpip_put: size=%d\n", size)); if (state->towrite < 0) @@ -504,7 +651,7 @@ int tcpip_put(COMSTACK h, char *buf, int size) if ((res = send(h->iofile, buf + state->written, size - state->written, 0)) < 0) { -#ifdef WINDOWS +#ifdef WIN32 if (WSAGetLastError() == WSAEWOULDBLOCK) #else if (errno == EAGAIN) @@ -527,10 +674,15 @@ int tcpip_put(COMSTACK h, char *buf, int size) int tcpip_close(COMSTACK h) { - tcpip_state *sp = h->private; + tcpip_state *sp = (struct tcpip_state *)h->cprivate; TRC(fprintf(stderr, "tcpip_close\n")); - close(h->iofile); + if (h->iofile != -1) +#ifdef WIN32 + closesocket(h->iofile); +#else + close(h->iofile); +#endif if (sp->altbuf) xfree(sp->altbuf); xfree(sp); @@ -541,11 +693,11 @@ int tcpip_close(COMSTACK h) char *tcpip_addrstr(COMSTACK h) { struct sockaddr_in addr; - static char buf[64]; - char *r; - int len; + tcpip_state *sp = (struct tcpip_state *)h->cprivate; + char *r, *buf = sp->buf; + size_t len; struct hostent *host; - + len = sizeof(addr); if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0) { @@ -553,7 +705,7 @@ char *tcpip_addrstr(COMSTACK h) return 0; } if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr), - AF_INET))) + AF_INET))) r = (char*) host->h_name; else r = inet_ntoa(addr.sin_addr);