Annotation of libwww/Library/src/HTTCP.c, revision 2.66
2.31 frystyk 1: /* HTTCP.c
2: ** GENERIC COMMUNICATION CODE
3: **
2.42 frystyk 4: ** (c) COPYRIGHT MIT 1995.
2.31 frystyk 5: ** Please first read the full copyright statement in the file COPYRIGH.
1.1 timbl 6: **
7: ** This code is in common between client and server sides.
8: **
9: ** 16 Jan 92 TBL Fix strtol() undefined on CMU Mach.
10: ** 25 Jun 92 JFG Added DECNET option through TCP socket emulation.
2.7 duns 11: ** 13 Sep 93 MD Added correct return of vmserrorno for HTInetStatus.
12: ** Added decoding of vms error message for MULTINET.
2.13 frystyk 13: ** 31 May 94 HF Added cache on host id's; now use inet_ntoa() to
14: ** HTInetString and some other fixes. Added HTDoConnect
15: ** and HTDoAccept
1.1 timbl 16: */
17:
2.36 frystyk 18: /* Library include files */
19: #include "tcp.h"
2.13 frystyk 20: #include "HTUtils.h"
2.36 frystyk 21: #include "HTString.h"
2.13 frystyk 22: #include "HTAtom.h"
23: #include "HTList.h"
24: #include "HTParse.h"
2.50 frystyk 25: #include "HTAlert.h"
2.13 frystyk 26: #include "HTError.h"
2.58 frystyk 27: #include "HTReqMan.h"
2.54 frystyk 28: #include "HTNetMan.h"
29: #include "HTDNS.h"
2.36 frystyk 30: #include "HTTCP.h" /* Implemented here */
2.29 frystyk 31:
2.36 frystyk 32: /* VMS stuff */
33: #ifdef VMS
34: #ifndef MULTINET
35: #define FD_SETSIZE 32
36: #else /* Multinet */
37: #define FD_SETSIZE 256
38: #endif /* Multinet */
39: #endif /* VMS */
40:
2.13 frystyk 41: /* Macros and other defines */
2.24 frystyk 42: /* x seconds penalty on a multi-homed host if IP-address is down */
43: #define TCP_PENALTY 1200
44:
45: /* x seconds penalty on a multi-homed host if IP-address is timed out */
46: #define TCP_DELAY 600
47:
48: /* Max number of non-blocking accepts */
2.13 frystyk 49: #define MAX_ACCEPT_POLL 30
50:
2.36 frystyk 51: #ifndef RESOLV_CONF
52: #define RESOLV_CONF "/etc/resolv.conf"
53: #endif
54:
2.56 frystyk 55: #ifdef __svr4__
56: #define HT_BACKLOG 32 /* Number of pending connect requests (TCP) */
57: #else
58: #define HT_BACKLOG 5 /* Number of pending connect requests (TCP) */
59: #endif /* __svr4__ */
60:
2.54 frystyk 61: PRIVATE char *hostname = NULL; /* The name of this host */
2.13 frystyk 62:
2.19 frystyk 63: PRIVATE char *mailaddress = NULL; /* Current mail address */
2.11 duns 64:
2.13 frystyk 65: /* ------------------------------------------------------------------------- */
1.1 timbl 66:
2.36 frystyk 67: /*
68: ** Returns the string equivalent to the errno passed in the argument.
2.37 frystyk 69: ** We can't use errno directly as we have both errno and socerrno. The
2.36 frystyk 70: ** result is a static buffer.
1.1 timbl 71: */
2.63 frystyk 72: PUBLIC CONST char * HTErrnoString (int errornumber)
1.1 timbl 73: {
2.41 frystyk 74:
2.40 frystyk 75: #ifdef HAVE_STRERROR
2.36 frystyk 76: return strerror(errornumber);
2.34 roeber 77: #else
2.36 frystyk 78: #ifdef VMS
2.12 luotonen 79: static char buf[60];
2.36 frystyk 80: sprintf(buf,"Unix errno = %ld dec, VMS error = %lx hex", errornumber,
81: vaxc$errno);
2.12 luotonen 82: return buf;
2.41 frystyk 83: #else
2.40 frystyk 84: #ifdef _WINDOWS
2.41 frystyk 85: static char buf[60];
86: sprintf(buf, "Unix errno = %ld dec, WinSock erro = %ld", errornumber, WSAGetLastError());
87: return buf;
2.40 frystyk 88: #else
2.36 frystyk 89: return (errornumber < sys_nerr ? sys_errlist[errornumber]:"Unknown error");
2.40 frystyk 90: #endif /* WINDOWS */
91: #endif /* VMS */
2.51 frystyk 92: #endif /* HAVE_STRERROR */
2.12 luotonen 93: }
94:
2.36 frystyk 95:
96: /* Debug error message
2.12 luotonen 97: */
2.63 frystyk 98: PUBLIC int HTInetStatus (int errnum, char * where)
2.12 luotonen 99: {
2.40 frystyk 100: #if ! (defined(VMS) || defined(WINDOWS))
2.12 luotonen 101:
2.27 frystyk 102: if (PROT_TRACE)
2.61 frystyk 103: TTYPrint(TDEST, "TCP errno... %d after call to %s() failed.\n............ %s\n", errno, where, HTErrnoString(errnum));
1.1 timbl 104:
2.36 frystyk 105: #else /* VMS */
2.40 frystyk 106: #ifdef VMS
2.61 frystyk 107: if (PROT_TRACE) TTYPrint(TDEST, " Unix error number = %ld dec\n", errno);
108: if (PROT_TRACE) TTYPrint(TDEST, " VMS error = %lx hex\n", vaxc$errno);
2.40 frystyk 109: #endif
110: #ifdef WINDOWS
2.61 frystyk 111: if (PROT_TRACE) TTYPrint(TDEST, " Unix error number = %ld dec\n", errno);
112: if (PROT_TRACE) TTYPrint(TDEST, " NT error = %lx hex\n", WSAGetLastError());
2.40 frystyk 113: #endif
2.12 luotonen 114:
2.36 frystyk 115: #ifdef MULTINET
2.61 frystyk 116: if (PROT_TRACE) TTYPrint(TDEST, " Multinet error = %lx hex\n", socket_errno);
117: if (PROT_TRACE) TTYPrint(TDEST, " Error String = %s\n", vms_errno_string());
2.36 frystyk 118: #endif /* MULTINET */
2.12 luotonen 119:
2.36 frystyk 120: #endif /* VMS */
2.7 duns 121:
2.36 frystyk 122: #ifdef VMS
2.11 duns 123: /* errno happen to be zero if vaxc$errno <> 0 */
124: return -vaxc$errno;
2.7 duns 125: #else
1.1 timbl 126: return -errno;
2.7 duns 127: #endif
1.1 timbl 128: }
129:
130:
131: /* Parse a cardinal value parse_cardinal()
132: ** ----------------------
133: **
134: ** On entry,
135: ** *pp points to first character to be interpreted, terminated by
136: ** non 0:9 character.
137: ** *pstatus points to status already valid
138: ** maxvalue gives the largest allowable value.
139: **
140: ** On exit,
141: ** *pp points to first unread character
142: ** *pstatus points to status updated iff bad
143: */
144:
2.63 frystyk 145: PUBLIC unsigned int HTCardinal (int * pstatus,
146: char ** pp,
147: unsigned int max_value)
1.1 timbl 148: {
2.36 frystyk 149: unsigned int n=0;
1.1 timbl 150: if ( (**pp<'0') || (**pp>'9')) { /* Null string is error */
151: *pstatus = -3; /* No number where one expeceted */
152: return 0;
153: }
154: while ((**pp>='0') && (**pp<='9')) n = n*10 + *((*pp)++) - '0';
155:
156: if (n>max_value) {
157: *pstatus = -4; /* Cardinal outside range */
158: return 0;
159: }
160:
161: return n;
162: }
163:
2.19 frystyk 164: /* ------------------------------------------------------------------------- */
2.27 frystyk 165: /* SIGNAL HANDLING */
166: /* ------------------------------------------------------------------------- */
167:
168: #ifdef WWWLIB_SIG
169: /* HTSetSignal
170: ** This function sets up signal handlers. This might not be necessary to
171: ** call if the application has its own handlers.
172: */
173: #include <signal.h>
2.56 frystyk 174: PUBLIC void HTSetSignal (void)
2.27 frystyk 175: {
176: /* On some systems (SYSV) it is necessary to catch the SIGPIPE signal
177: ** when attemting to connect to a remote host where you normally should
178: ** get `connection refused' back
179: */
180: if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
2.61 frystyk 181: if (PROT_TRACE) TTYPrint(TDEST, "HTSignal.... Can't catch SIGPIPE\n");
2.27 frystyk 182: } else {
2.61 frystyk 183: if (PROT_TRACE) TTYPrint(TDEST, "HTSignal.... Ignoring SIGPIPE\n");
2.27 frystyk 184: }
185: }
186: #endif /* WWWLIB_SIG */
187:
188: /* ------------------------------------------------------------------------- */
2.19 frystyk 189: /* HOST NAME FUNCTIONS */
190: /* ------------------------------------------------------------------------- */
191:
192: /* Produce a string for an Internet address
193: ** ----------------------------------------
194: **
195: ** On exit,
196: ** returns a pointer to a static string which must be copied if
2.41 frystyk 197: ** it is to be kept.
2.19 frystyk 198: */
2.63 frystyk 199: PUBLIC CONST char * HTInetString (SockA * sin)
2.19 frystyk 200: {
2.53 frystyk 201: #ifndef DECNET /* Function only used below for a trace message */
2.41 frystyk 202: #if 0
203: /* This dumps core on some Sun systems :-(. The problem is now, that
204: the current implememtation only works for IP-addresses and not in
205: other address spaces. */
206: return inet_ntoa(sin->sin_addr);
207: #endif
2.19 frystyk 208: static char string[16];
209: sprintf(string, "%d.%d.%d.%d",
210: (int)*((unsigned char *)(&sin->sin_addr)+0),
211: (int)*((unsigned char *)(&sin->sin_addr)+1),
212: (int)*((unsigned char *)(&sin->sin_addr)+2),
213: (int)*((unsigned char *)(&sin->sin_addr)+3));
214: return string;
2.53 frystyk 215: #else
216: return "";
217: #endif /* Decnet */
2.19 frystyk 218: }
219:
1.1 timbl 220: /* Parse a network node address and port
221: ** -------------------------------------
2.54 frystyk 222: ** It is assumed that any portnumber and numeric host address
223: ** is given in decimal notation. Separation character is '.'
224: ** Any port number given in host name overrides all other values.
225: ** 'host' might be modified.
226: ** Returns:
227: ** >0 Number of homes
228: ** 0 Wait for persistent socket
229: ** -1 Error
1.1 timbl 230: */
2.54 frystyk 231: PRIVATE int HTParseInet (HTNet * net, char * host)
1.1 timbl 232: {
2.54 frystyk 233: int status = 1;
234: SockA *sin = &net->sock_addr;
2.27 frystyk 235:
1.1 timbl 236: #ifdef DECNET
237: /* read Decnet node name. @@ Should know about DECnet addresses, but it's
238: probably worth waiting until the Phase transition from IV to V. */
239:
240: sin->sdn_nam.n_len = min(DN_MAXNAML, strlen(host)); /* <=6 in phase 4 */
241: strncpy (sin->sdn_nam.n_name, host, sin->sdn_nam.n_len + 1);
242:
2.61 frystyk 243: if (PROT_TRACE) TTYPrint(TDEST,
1.1 timbl 244: "DECnet: Parsed address as object number %d on host %.6s...\n",
245: sin->sdn_objnum, host);
2.13 frystyk 246: #else /* Internet */
247: {
248: char *strptr = host;
249: while (*strptr) {
2.54 frystyk 250: if (*strptr == ':') {
251: *strptr = '\0'; /* Don't want port number in numeric host */
2.13 frystyk 252: break;
253: }
2.54 frystyk 254: if (!isdigit(*strptr) && *strptr != '.')
255: break;
256: strptr++;
2.13 frystyk 257: }
2.54 frystyk 258: if (!*strptr) {
2.51 frystyk 259: #ifdef GUSI
260: sin->sin_addr = inet_addr(host); /* See netinet/in.h */
261: #else
2.13 frystyk 262: sin->sin_addr.s_addr = inet_addr(host); /* See arpa/inet.h */
2.51 frystyk 263: #endif
2.54 frystyk 264: } else
265: status = HTGetHostByName(net, host);
266:
2.27 frystyk 267: if (PROT_TRACE) {
2.54 frystyk 268: if (status > 0)
2.61 frystyk 269: TTYPrint(TDEST, "ParseInet... as port %d on %s with %d homes\n",
2.54 frystyk 270: (int) ntohs(sin->sin_port), HTInetString(sin), status);
1.1 timbl 271: }
272: }
2.54 frystyk 273: #endif /* Internet vs. Decnet */
2.24 frystyk 274: return status;
1.1 timbl 275: }
276:
277:
2.24 frystyk 278: /* HTGetDomainName
279: ** Returns the current domain name without the local host name.
280: ** The response is pointing to a static area that might be changed
2.36 frystyk 281: ** using HTSetHostName().
282: **
283: ** Returns NULL on error, "" if domain name is not found
2.24 frystyk 284: */
2.56 frystyk 285: PUBLIC CONST char *HTGetDomainName (void)
2.24 frystyk 286: {
287: CONST char *host = HTGetHostName();
288: char *domain;
289: if (host && *host) {
290: if ((domain = strchr(host, '.')) != NULL)
291: return ++domain;
292: else
2.36 frystyk 293: return "";
2.24 frystyk 294: } else
295: return NULL;
296: }
297:
298:
2.19 frystyk 299: /* HTSetHostName
300: ** Sets the current hostname inclusive domain name.
301: ** If this is not set then the default approach is used using
302: ** HTGetHostname().
303: */
2.63 frystyk 304: PUBLIC void HTSetHostName (char * host)
2.19 frystyk 305: {
2.24 frystyk 306: if (host && *host) {
307: char *strptr;
2.19 frystyk 308: StrAllocCopy(hostname, host);
2.24 frystyk 309: strptr = hostname;
310: while (*strptr) {
311: *strptr = TOLOWER(*strptr);
312: strptr++;
313: }
314: if (*(hostname+strlen(hostname)-1) == '.') /* Remove trailing dot */
315: *(hostname+strlen(hostname)-1) = '\0';
316: } else {
2.61 frystyk 317: if (PROT_TRACE) TTYPrint(TDEST, "SetHostName. Bad argument ignored\n");
2.19 frystyk 318: }
319: }
320:
321:
322: /* HTGetHostName
2.18 frystyk 323: ** Returns the name of this host. It uses the following algoritm:
324: **
325: ** 1) gethostname()
326: ** 2) if the hostname doesn't contain any '.' try to read
327: ** /etc/resolv.conf. If there is no domain line in this file then
328: ** 3) Try getdomainname and do as the man pages say for resolv.conf (sun)
2.49 frystyk 329: ** If there is no domain line in this file, then it is derived
330: ** from the domain name set by the domainname(1) command, usually
331: ** by removing the first component. For example, if the domain-
332: ** name is set to ``foo.podunk.edu'' then the default domain name
333: ** used will be ``pudunk.edu''.
2.18 frystyk 334: **
335: ** This is the same procedure as used by res_init() and sendmail.
2.16 frystyk 336: **
337: ** Return: hostname on success else NULL
338: */
2.56 frystyk 339: PUBLIC CONST char * HTGetHostName (void)
1.1 timbl 340: {
2.18 frystyk 341: BOOL got_it = NO;
342: FILE *fp;
2.16 frystyk 343: char name[MAXHOSTNAMELEN+1];
2.18 frystyk 344: if (hostname) { /* If already done */
345: if (*hostname)
346: return hostname;
347: else
348: return NULL; /* We couldn't get the last time */
349: }
2.16 frystyk 350: *(name+MAXHOSTNAMELEN) = '\0';
2.52 frystyk 351:
352: #ifndef NO_GETHOSTNAME
2.16 frystyk 353: if (gethostname(name, MAXHOSTNAMELEN)) { /* Maybe without domain */
2.27 frystyk 354: if (PROT_TRACE)
2.61 frystyk 355: TTYPrint(TDEST, "HostName.... Can't get host name\n");
2.16 frystyk 356: return NULL;
357: }
2.27 frystyk 358: if (PROT_TRACE)
2.61 frystyk 359: TTYPrint(TDEST, "HostName.... Local host name is `%s\'\n", name);
2.16 frystyk 360: StrAllocCopy(hostname, name);
2.24 frystyk 361: {
362: char *strptr = strchr(hostname, '.');
363: if (strptr != NULL) /* We have it all */
364: got_it = YES;
365: }
2.16 frystyk 366:
2.52 frystyk 367: #ifndef NO_RESOLV_CONF
2.18 frystyk 368: /* Now try the resolver config file */
2.24 frystyk 369: if (!got_it && (fp = fopen(RESOLV_CONF, "r")) != NULL) {
2.18 frystyk 370: char buffer[80];
371: *(buffer+79) = '\0';
372: while (fgets(buffer, 79, fp)) {
373: if (!strncasecomp(buffer, "domain", 6)) {
374: char *domainstr = buffer+6;
375: char *end;
376: while (*domainstr == ' ' || *domainstr == '\t')
377: domainstr++;
378: end = domainstr;
379: while (*end && !isspace(*end))
380: end++;
381: *end = '\0';
382: if (*domainstr) {
383: StrAllocCat(hostname, ".");
384: StrAllocCat(hostname, domainstr);
385: got_it = YES;
386: break;
387: }
388: }
389: }
390: fclose(fp);
2.16 frystyk 391: }
2.52 frystyk 392: #endif /* NO_RESOLV_CONF */
2.16 frystyk 393:
2.52 frystyk 394: #ifndef NO_GETDOMAINNAME
2.18 frystyk 395: /* If everything else has failed then try getdomainname */
396: if (!got_it) {
397: if (getdomainname(name, MAXHOSTNAMELEN)) {
2.27 frystyk 398: if (PROT_TRACE)
2.61 frystyk 399: TTYPrint(TDEST, "HostName.... Can't get domain name\n");
2.24 frystyk 400: StrAllocCopy(hostname, "");
2.18 frystyk 401: return NULL;
402: }
403:
404: /* If the host name and the first part of the domain name are different
405: then use the former as it is more exact (I guess) */
406: if (strncmp(name, hostname, (int) strlen(hostname))) {
407: char *domain = strchr(name, '.');
2.50 frystyk 408: if (!domain)
409: domain = name;
410: StrAllocCat(hostname, domain);
2.18 frystyk 411: }
2.16 frystyk 412: }
2.36 frystyk 413: #endif /* NO_GETDOMAINNAME */
2.23 duns 414:
2.24 frystyk 415: {
416: char *strptr = hostname;
417: while (*strptr) {
418: *strptr = TOLOWER(*strptr);
419: strptr++;
420: }
421: if (*(hostname+strlen(hostname)-1) == '.') /* Remove trailing dot */
422: *(hostname+strlen(hostname)-1) = '\0';
423: }
2.52 frystyk 424: #endif /* NO_GETHOSTNAME */
425:
2.27 frystyk 426: if (PROT_TRACE)
2.61 frystyk 427: TTYPrint(TDEST, "HostName.... Full host name is `%s\'\n", hostname);
2.18 frystyk 428: return hostname;
2.13 frystyk 429: }
430:
2.19 frystyk 431:
2.32 frystyk 432: /*
433: ** Free the host name. Called from HTLibTerminate
434: */
2.56 frystyk 435: PUBLIC void HTFreeHostName (void)
2.32 frystyk 436: {
437: FREE(hostname);
438: }
439:
440:
2.19 frystyk 441: /* HTSetMailAddress
442: ** Sets the current mail address plus host name and domain name.
443: ** If this is not set then the default approach is used using
2.27 frystyk 444: ** HTGetMailAddress(). If the argument is NULL or "" then HTGetMailAddress
445: ** returns NULL on a succeding request.
2.19 frystyk 446: */
2.63 frystyk 447: PUBLIC void HTSetMailAddress (char * address)
2.19 frystyk 448: {
2.27 frystyk 449: if (!address || !*address)
450: StrAllocCopy(mailaddress, "");
451: else
2.19 frystyk 452: StrAllocCopy(mailaddress, address);
2.59 frystyk 453: if (WWWTRACE)
2.61 frystyk 454: TTYPrint(TDEST, "SetMailAdr.. Set mail address to `%s\'\n",
2.27 frystyk 455: mailaddress);
2.19 frystyk 456: }
457:
458:
459: /* HTGetMailAddress
460: **
461: ** Get the mail address of the current user on the current host. The
462: ** domain name used is the one initialized in HTSetHostName or
463: ** HTGetHostName. The login name is determined using (ordered):
464: **
465: ** getlogin
466: ** getpwuid(getuid())
467: **
468: ** The weakness about the last attempt is if the user has multiple
469: ** login names each with the same user ID. If this fails as well then:
470: **
471: ** LOGNAME environment variable
472: ** USER environment variable
473: **
474: ** Returns NULL if error else pointer to static string
475: */
2.56 frystyk 476: PUBLIC CONST char * HTGetMailAddress (void)
2.19 frystyk 477: {
2.47 frystyk 478: #ifdef HT_REENTRANT
479: char name[LOGNAME_MAX+1]; /* For getlogin_r */
480: #endif
2.19 frystyk 481: char *login;
482: CONST char *domain;
483: struct passwd *pw_info;
2.21 frystyk 484: if (mailaddress) {
485: if (*mailaddress)
486: return mailaddress;
487: else
488: return NULL; /* No luck the last time so we wont try again */
489: }
2.23 duns 490:
2.36 frystyk 491: #ifdef VMS
2.23 duns 492: if ((login = (char *) cuserid(NULL)) == NULL) {
2.61 frystyk 493: if (PROT_TRACE) TTYPrint(TDEST, "MailAddress. cuserid returns NULL\n");
2.36 frystyk 494: }
495: #else
2.40 frystyk 496: #ifdef WIN32
2.41 frystyk 497: login = getenv("USERNAME") ;
2.40 frystyk 498: #else
2.41 frystyk 499: #ifdef _WINDOWS
2.36 frystyk 500: login = "PCUSER"; /* @@@ COULD BE BETTER @@@ */
2.51 frystyk 501: #else
502: #ifdef GUSI
503: if ((login = getenv("LOGNAME")) == NULL)
504: login = "MACUSER";
2.36 frystyk 505: #else /* Unix like... */
2.47 frystyk 506: #ifdef HT_REENTRANT
507: if ((login = (char *) getlogin_r(name, LOGNAME_MAX)) == NULL) {
508: #else
2.34 roeber 509: if ((login = (char *) getlogin()) == NULL) {
2.47 frystyk 510: #endif
2.36 frystyk 511: if (PROT_TRACE)
2.61 frystyk 512: TTYPrint(TDEST, "MailAddress. getlogin returns NULL\n");
2.36 frystyk 513: if ((pw_info = getpwuid(getuid())) == NULL) {
514: if (PROT_TRACE)
2.61 frystyk 515: TTYPrint(TDEST, "MailAddress. getpwid returns NULL\n");
2.36 frystyk 516: if ((login = getenv("LOGNAME")) == NULL) {
517: if (PROT_TRACE)
2.61 frystyk 518: TTYPrint(TDEST, "MailAddress. LOGNAME not found\n");
2.36 frystyk 519: if ((login = getenv("USER")) == NULL) {
520: if (PROT_TRACE)
2.61 frystyk 521: TTYPrint(TDEST,"MailAddress. USER not found\n");
2.36 frystyk 522: return NULL; /* I GIVE UP */
523: }
524: }
525: } else
526: login = pw_info->pw_name;
527: }
2.51 frystyk 528: #endif /* GUSI */
529: #endif /* _WINDOWS */
530: #endif /* WIN32 */
531: #endif /* VMS */
2.34 roeber 532:
2.19 frystyk 533: if (login) {
534: StrAllocCopy(mailaddress, login);
535: StrAllocCat(mailaddress, "@");
536: if ((domain = HTGetHostName()) != NULL)
537: StrAllocCat(mailaddress, domain);
2.21 frystyk 538: else {
539: *mailaddress = '\0';
540: return NULL; /* Domain name not available */
541: }
2.19 frystyk 542: return mailaddress;
543: }
544: return NULL;
545: }
2.32 frystyk 546:
547:
548: /*
549: ** Free the mail address. Called from HTLibTerminate
550: */
2.56 frystyk 551: PUBLIC void HTFreeMailAddress (void)
2.32 frystyk 552: {
553: FREE(mailaddress);
554: }
555:
2.19 frystyk 556:
557: /* ------------------------------------------------------------------------- */
558: /* CONNECTION ESTABLISHMENT MANAGEMENT */
559: /* ------------------------------------------------------------------------- */
2.13 frystyk 560:
561: /* HTDoConnect()
562: **
563: ** Note: Any port indication in URL, e.g., as `host:port' overwrites
2.54 frystyk 564: ** the default port value.
2.13 frystyk 565: **
2.40 frystyk 566: ** returns HT_ERROR Error has occured or interrupted
567: ** HT_OK if connected
568: ** HT_WOULD_BLOCK if operation would have blocked
2.13 frystyk 569: */
2.54 frystyk 570: PUBLIC int HTDoConnect (HTNet * net, char * url, u_short default_port)
2.13 frystyk 571: {
572: int status;
2.65 frystyk 573: HTRequest * request = net->request;
2.55 frystyk 574: char *fullhost = HTParse(url, "", PARSE_HOST);
2.13 frystyk 575: char *at_sign;
576: char *host;
577:
2.54 frystyk 578: /* if there's an @ then use the stuff after it as a hostname */
2.55 frystyk 579: if ((at_sign = strchr(fullhost, '@')) != NULL)
2.13 frystyk 580: host = at_sign+1;
581: else
2.55 frystyk 582: host = fullhost;
2.24 frystyk 583: if (!*host) {
2.65 frystyk 584: HTRequest_addError(request, ERR_FATAL, NO, HTERR_NO_HOST,
2.24 frystyk 585: NULL, 0, "HTDoConnect");
2.55 frystyk 586: free(fullhost);
2.40 frystyk 587: return HT_ERROR;
2.27 frystyk 588: }
2.13 frystyk 589:
2.55 frystyk 590: /* Jump into the state machine */
591: while (1) {
592: switch (net->tcpstate) {
593: case TCP_BEGIN:
594: {
595: char *port = strchr(host, ':');
596: SockA *sin = &net->sock_addr;
597: memset((void *) sin, '\0', sizeof(SockA));
598: if (port++ && isdigit(*port)) {
2.54 frystyk 599: #ifdef DECNET
2.55 frystyk 600: sin->sdn_family = AF_DECnet;
601: sin->sdn_objnum=(unsigned char)(strtol(port,(char**)0,10));
602: #else
603: sin->sin_family = AF_INET;
604: sin->sin_port = htons(atol(port));
2.54 frystyk 605: #endif
2.55 frystyk 606: } else {
2.13 frystyk 607: #ifdef DECNET
2.55 frystyk 608: sin->sdn_family = AF_DECnet;
609: net->sock_addr.sdn_objnum = DNP_OBJ;
2.13 frystyk 610: #else /* Internet */
2.55 frystyk 611: sin->sin_family = AF_INET;
612: sin->sin_port = htons(default_port);
2.13 frystyk 613: #endif
2.55 frystyk 614: }
615: }
2.44 frystyk 616: if (PROT_TRACE)
2.61 frystyk 617: TTYPrint(TDEST, "HTDoConnect. Looking up `%s\'\n", host);
2.55 frystyk 618: net->tcpstate = TCP_DNS;
619: break;
620:
621: case TCP_DNS:
622: if ((status = HTParseInet(net, host)) < 0) {
2.27 frystyk 623: if (PROT_TRACE)
2.61 frystyk 624: TTYPrint(TDEST, "HTDoConnect. Can't locate `%s\'\n", host);
2.65 frystyk 625: HTRequest_addError(request, ERR_FATAL, NO,HTERR_NO_REMOTE_HOST,
2.27 frystyk 626: (void *) host, strlen(host), "HTDoConnect");
2.55 frystyk 627: net->tcpstate = TCP_ERROR;
2.27 frystyk 628: break;
2.55 frystyk 629: }
630:
631: /*
632: ** Wait for a persistent connection. When we return, we check
633: ** that the socket hasn't been closed in the meantime
634: */
635: if (!status) {
2.56 frystyk 636: net->tcpstate = TCP_NEED_CONNECT;
2.55 frystyk 637: free(fullhost);
638: HTNet_wait(net);
2.54 frystyk 639: return HT_PERSISTENT;
2.55 frystyk 640: }
2.54 frystyk 641:
2.55 frystyk 642: if (!net->retry && status > 1) /* If multiple homes */
643: net->retry = status;
644: if (net->sockfd != INVSOC) { /* Reusing socket */
2.54 frystyk 645: if (PROT_TRACE)
2.61 frystyk 646: TTYPrint(TDEST, "HTDoConnect. REUSING SOCKET %d\n",
2.55 frystyk 647: net->sockfd);
648: net->tcpstate = TCP_CONNECTED;
649: } else
650: net->tcpstate = TCP_NEED_SOCKET;
651: break;
652:
653: case TCP_NEED_SOCKET:
2.27 frystyk 654: #ifdef DECNET
2.36 frystyk 655: if ((net->sockfd=socket(AF_DECnet, SOCK_STREAM, 0))==INVSOC)
2.27 frystyk 656: #else
2.55 frystyk 657: if ((net->sockfd=socket(AF_INET, SOCK_STREAM,IPPROTO_TCP))==INVSOC)
2.27 frystyk 658: #endif
659: {
2.65 frystyk 660: HTRequest_addSystemError(request, ERR_FATAL, socerrno, NO, "socket");
2.55 frystyk 661: net->tcpstate = TCP_ERROR;
2.27 frystyk 662: break;
663: }
664: if (PROT_TRACE)
2.61 frystyk 665: TTYPrint(TDEST, "HTDoConnect. Created socket %d\n",net->sockfd);
2.27 frystyk 666:
2.28 frystyk 667: /* If non-blocking protocol then change socket status
2.50 frystyk 668: ** I use FCNTL so that I can ask the status before I set it.
669: ** See W. Richard Stevens (Advan. Prog. in UNIX environment, p.364)
670: ** Be CAREFULL with the old `O_NDELAY' - it will not work as read()
671: ** returns 0 when blocking and NOT -1. FNDELAY is ONLY for BSD and
672: ** does NOT work on SVR4 systems. O_NONBLOCK is POSIX.
673: */
2.53 frystyk 674: if (!net->preemtive) {
2.64 frystyk 675: #ifdef _WINDOWS
2.41 frystyk 676: { /* begin windows scope */
2.65 frystyk 677: HTRequest * rq = request;
2.41 frystyk 678: long levents = FD_READ | FD_WRITE | FD_ACCEPT |
679: FD_CONNECT | FD_CLOSE ;
680: int rv = 0 ;
681:
2.64 frystyk 682: #ifdef WWW_WIN_ASYNC
2.41 frystyk 683: /* N.B WSAAsyncSelect() turns on non-blocking I/O */
2.64 frystyk 684: rv = WSAAsyncSelect( net->sockfd, rq->hwnd,
685: rq->winMsg, levents);
686: if (rv == SOCKET_ERROR) {
687: status = -1 ;
688: if (PROT_TRACE)
689: TTYPrint(TDEST, "HTDoConnect. WSAAsyncSelect() fails: %d\n",
690: WSAGetLastError());
691: } /* error returns */
692: #else
693: int enable = 1;
694: status = IOCTL(net->sockfd, FIONBIO, &enable);
695: #endif
2.41 frystyk 696: } /* end scope */
697: #else
698: #if defined(VMS)
2.36 frystyk 699: {
700: int enable = 1;
701: status = IOCTL(net->sockfd, FIONBIO, &enable);
702: }
703: #else
2.27 frystyk 704: if((status = FCNTL(net->sockfd, F_GETFL, 0)) != -1) {
2.41 frystyk 705: status |= O_NONBLOCK; /* POSIX */
2.27 frystyk 706: status = FCNTL(net->sockfd, F_SETFL, status);
707: }
2.41 frystyk 708: #endif /* VMS */
709: #endif /* WINDOW */
2.43 frystyk 710: if (PROT_TRACE) {
711: if (status == -1)
2.61 frystyk 712: TTYPrint(TDEST, "HTDoConnect. Only blocking works\n");
2.43 frystyk 713: else
2.61 frystyk 714: TTYPrint(TDEST, "HTDoConnect. Non-blocking socket\n");
2.43 frystyk 715: }
2.57 frystyk 716: } else if (PROT_TRACE)
2.61 frystyk 717: TTYPrint(TDEST, "HTDoConnect. Blocking socket\n");
2.56 frystyk 718:
2.27 frystyk 719: /* If multi-homed host then start timer on connection */
2.55 frystyk 720: if (net->retry) net->connecttime = time(NULL);
2.65 frystyk 721:
722: /* Progress */
723: {
724: HTAlertCallback *cbf = HTAlert_find(HT_PROG_CONNECT);
725: if (cbf)
726: (*cbf)(request,HT_PROG_CONNECT,HT_MSG_NULL,NULL,NULL,NULL);
727: }
2.56 frystyk 728: net->tcpstate = TCP_NEED_CONNECT;
2.55 frystyk 729: break;
2.54 frystyk 730:
2.56 frystyk 731: case TCP_NEED_CONNECT:
2.55 frystyk 732: status = connect(net->sockfd, (struct sockaddr *) &net->sock_addr,
733: sizeof(net->sock_addr));
734: /*
735: * According to the Sun man page for connect:
736: * EINPROGRESS The socket is non-blocking and the con-
737: * nection cannot be completed immediately.
738: * It is possible to select(2) for comple-
739: * tion by selecting the socket for writ-
740: * ing.
741: * According to the Motorola SVR4 man page for connect:
742: * EAGAIN The socket is non-blocking and the con-
743: * nection cannot be completed immediately.
744: * It is possible to select for completion
745: * by selecting the socket for writing.
746: * However, this is only possible if the
747: * socket STREAMS module is the topmost
748: * module on the protocol stack with a
749: * write service procedure. This will be
750: * the normal case.
751: */
752: #ifdef _WINSOCKAPI_
753: if (status == SOCKET_ERROR)
754: #else
755: if (status < 0)
756: #endif
757: {
2.27 frystyk 758: #ifdef EAGAIN
2.55 frystyk 759: if (socerrno==EINPROGRESS || socerrno==EAGAIN)
2.41 frystyk 760: #else
2.55 frystyk 761: #ifdef _WINSOCKAPI_
762: if (socerrno==WSAEWOULDBLOCK)
2.40 frystyk 763: #else
2.55 frystyk 764: if (socerrno==EINPROGRESS)
765: #endif /* _WINSOCKAPI_ */
2.27 frystyk 766: #endif /* EAGAIN */
2.55 frystyk 767: {
768: if (PROT_TRACE)
2.65 frystyk 769: TTYPrint(TDEST,"HTDoConnect. WOULD BLOCK `%s'\n",host);
770: HTEvent_Register(net->sockfd, request, (SockOps)FD_CONNECT,
2.55 frystyk 771: net->cbf, net->priority);
772: free(fullhost);
773: return HT_WOULD_BLOCK;
774: }
775: if (socerrno == EISCONN) {
776: net->tcpstate = TCP_CONNECTED;
777: break;
778: }
2.58 frystyk 779: #ifdef _WINSOCKAPI_
2.59 frystyk 780: if (socerrno == WSAEBADF) /* We lost the socket */
2.58 frystyk 781: #else
782: if (socerrno == EBADF) /* We lost the socket */
783: #endif
784: {
2.55 frystyk 785: net->tcpstate = TCP_NEED_SOCKET;
786: break;
2.27 frystyk 787: }
2.55 frystyk 788: if (net->retry) {
789: net->connecttime -= time(NULL);
2.54 frystyk 790: /* Added EINVAL `invalid argument' as this is what I
791: get back from a non-blocking connect where I should
792: get `connection refused' on BSD. SVR4 gives SIG_PIPE */
2.58 frystyk 793: #if defined(__srv4__) || defined (_WINSOCKAPI_)
2.55 frystyk 794: if (socerrno==ECONNREFUSED || socerrno==ETIMEDOUT ||
795: socerrno==ENETUNREACH || socerrno==EHOSTUNREACH ||
796: socerrno==EHOSTDOWN)
797: #else
2.54 frystyk 798: if (socerrno==ECONNREFUSED || socerrno==ETIMEDOUT ||
799: socerrno==ENETUNREACH || socerrno==EHOSTUNREACH ||
800: socerrno==EHOSTDOWN || socerrno==EINVAL)
2.35 roeber 801: #endif
2.54 frystyk 802: net->connecttime += TCP_DELAY;
803: else
804: net->connecttime += TCP_PENALTY;
2.55 frystyk 805: HTDNS_updateWeigths(net->dns, net->home, net->connecttime);
806: }
807: net->tcpstate = TCP_ERROR;
808: } else
809: net->tcpstate = TCP_CONNECTED;
810: break;
811:
812: case TCP_CONNECTED:
813: HTEvent_UnRegister(net->sockfd, (SockOps) FD_CONNECT);
814: if (net->retry) {
815: net->connecttime -= time(NULL);
2.54 frystyk 816: HTDNS_updateWeigths(net->dns, net->home, net->connecttime);
2.27 frystyk 817: }
2.55 frystyk 818: net->retry = 0;
819: free(fullhost);
820: net->tcpstate = TCP_BEGIN;
821: return HT_OK;
822: break;
823:
2.56 frystyk 824: case TCP_NEED_BIND:
825: case TCP_NEED_LISTEN:
2.55 frystyk 826: case TCP_ERROR:
2.61 frystyk 827: if (PROT_TRACE) TTYPrint(TDEST, "HTDoConnect. Connect failed\n");
2.55 frystyk 828: if (net->sockfd != INVSOC) {
2.53 frystyk 829: HTEvent_UnRegister(net->sockfd, (SockOps) FD_ALL);
2.55 frystyk 830: NETCLOSE(net->sockfd);
831: net->sockfd = INVSOC;
832: if (HTDNS_socket(net->dns) != INVSOC) { /* Inherited socket */
833: HTDNS_setSocket(net->dns, INVSOC);
834: net->tcpstate = TCP_NEED_SOCKET;
835: break;
836: }
837: }
838:
839: /* Do we have more homes to try? */
840: if (--net->retry > 0) {
2.65 frystyk 841: HTRequest_addSystemError(request, ERR_NON_FATAL, socerrno, NO,
2.55 frystyk 842: "connect");
843: net->tcpstate = TCP_DNS;
2.24 frystyk 844: break;
845: }
2.65 frystyk 846: HTRequest_addSystemError(request, ERR_FATAL,socerrno,NO,"connect");
2.55 frystyk 847: HTDNS_delete(host);
2.54 frystyk 848: net->retry = 0;
2.55 frystyk 849: free (fullhost);
850: net->tcpstate = TCP_BEGIN;
851: return HT_ERROR;
852: break;
2.24 frystyk 853: }
2.55 frystyk 854: }
2.13 frystyk 855: }
856:
2.56 frystyk 857: /* HTDoAccept()
858: ** ------------
859: ** This function makes a non-blocking accept which will turn up as ready
860: ** read in the select.
861: ** Returns
862: ** HT_ERROR Error has occured or interrupted
863: ** HT_OK if connected
864: ** HT_WOULD_BLOCK if operation would have blocked
2.13 frystyk 865: */
2.56 frystyk 866: PUBLIC int HTDoAccept (HTNet * net, SOCKFD * newfd)
2.13 frystyk 867: {
868: int status;
2.56 frystyk 869: int size = sizeof(net->sock_addr);
2.65 frystyk 870: HTRequest *request = net->request;
2.36 frystyk 871: if (net->sockfd==INVSOC) {
2.61 frystyk 872: if (PROT_TRACE) TTYPrint(TDEST, "HTDoAccept.. Invalid socket\n");
2.56 frystyk 873: return HT_ERROR;
2.13 frystyk 874: }
2.65 frystyk 875:
876: /* Progress report */
877: {
878: HTAlertCallback *cbf = HTAlert_find(HT_PROG_ACCEPT);
879: if (cbf) (*cbf)(request, HT_PROG_ACCEPT, HT_MSG_NULL,NULL, NULL, NULL);
880: }
2.56 frystyk 881: status = accept(net->sockfd, (struct sockaddr *) &net->sock_addr, &size);
882: #ifdef _WINSOCKAPI_
883: if (status == SOCKET_ERROR)
884: #else
885: if (status < 0)
886: #endif
2.23 duns 887: {
2.56 frystyk 888: #ifdef EAGAIN
889: if (socerrno==EINPROGRESS || socerrno==EAGAIN)
890: #else
891: #ifdef _WINSOCKAPI_
892: if (socerrno==WSAEWOULDBLOCK)
893: #else
894: if (socerrno==EINPROGRESS)
895: #endif /* _WINSOCKAPI_ */
896: #endif /* EAGAIN */
897: {
898: if (PROT_TRACE)
2.61 frystyk 899: TTYPrint(TDEST,"HTDoAccept.. WOULD BLOCK %d\n", net->sockfd);
2.65 frystyk 900: HTEvent_Register(net->sockfd, request, (SockOps) FD_ACCEPT,
2.56 frystyk 901: net->cbf, net->priority);
902: return HT_WOULD_BLOCK;
903: }
2.65 frystyk 904: HTRequest_addSystemError(request, ERR_WARN, socerrno, YES, "accept");
2.61 frystyk 905: if (PROT_TRACE) TTYPrint(TDEST, "HTDoAccept.. Accept failed\n");
2.56 frystyk 906: if (HTDNS_socket(net->dns) != INVSOC) { /* Inherited socket */
907: HTDNS_setSocket(net->dns, INVSOC);
908: }
909: return HT_ERROR;
2.23 duns 910: }
2.56 frystyk 911: *newfd = status;
912: HTEvent_UnRegister(status, (SockOps) FD_ACCEPT);
913: return HT_OK;
914: }
915:
916:
917: /* HTDoListen
918: ** ----------
919: ** Listens on the specified port. 0 means that we chose it here
920: ** If master==INVSOC then we listen on all local interfaces (using a
921: ** wildcard). If !INVSOC then use this as the local interface
922: ** returns HT_ERROR Error has occured or interrupted
923: ** HT_OK if connected
924: */
925: PUBLIC int HTDoListen (HTNet * net, u_short port, SOCKFD master)
926: {
927: int status;
928:
929: /* Jump into the state machine */
930: while (1) {
931: switch (net->tcpstate) {
932: case TCP_BEGIN:
933: {
934: SockA *sin = &net->sock_addr;
935: memset((void *) sin, '\0', sizeof(SockA));
936: #ifdef DECNET
937: sin->sdn_family = AF_DECnet;
938: sin->sdn_objnum = port;
2.36 frystyk 939: #else
2.56 frystyk 940: sin->sin_family = AF_INET;
941: if (master != INVSOC) {
942: int len = sizeof(SockA);
943: if (getsockname(master, (struct sockaddr *) sin, &len)<0) {
2.65 frystyk 944: HTRequest_addSystemError(net->request, ERR_FATAL,
945: socerrno, NO, "getsockname");
2.56 frystyk 946: net->tcpstate = TCP_ERROR;
947: break;
948: }
949: } else
950: sin->sin_addr.s_addr = INADDR_ANY;
951: sin->sin_port = htons(port);
952: #endif
953: }
954: if (PROT_TRACE)
2.61 frystyk 955: TTYPrint(TDEST, "HTDoListen.. Listen on port %d\n", port);
2.56 frystyk 956: net->tcpstate = TCP_NEED_SOCKET;
957: break;
958:
959: case TCP_NEED_SOCKET:
960: #ifdef DECNET
961: if ((net->sockfd=socket(AF_DECnet, SOCK_STREAM, 0))==INVSOC)
962: #else
963: if ((net->sockfd=socket(AF_INET, SOCK_STREAM,IPPROTO_TCP))==INVSOC)
964: #endif
965: {
2.65 frystyk 966: HTRequest_addSystemError(net->request, ERR_FATAL, socerrno,
967: NO, "socket");
2.56 frystyk 968: net->tcpstate = TCP_ERROR;
969: break;
970: }
971: if (PROT_TRACE)
2.61 frystyk 972: TTYPrint(TDEST, "HTDoListen.. Created socket %d\n",net->sockfd);
2.56 frystyk 973:
974: /* If non-blocking protocol then change socket status
975: ** I use FCNTL so that I can ask the status before I set it.
976: ** See W. Richard Stevens (Advan. Prog. in UNIX environment, p.364)
977: ** Be CAREFULL with the old `O_NDELAY' - it will not work as read()
978: ** returns 0 when blocking and NOT -1. FNDELAY is ONLY for BSD and
979: ** does NOT work on SVR4 systems. O_NONBLOCK is POSIX.
980: */
981: if (!net->preemtive) {
982: #ifdef _WINDOWS
983: { /* begin windows scope */
984: long levents = FD_READ | FD_WRITE | FD_ACCEPT |
985: FD_CONNECT | FD_CLOSE ;
986: int rv = 0 ;
987:
2.64 frystyk 988: #ifdef WWW_WIN_ASYNC
2.56 frystyk 989: /* N.B WSAAsyncSelect() turns on non-blocking I/O */
2.65 frystyk 990: rv = WSAAsyncSelect(net->sockfd, request->hwnd,
2.66 ! frystyk 991: net->request->winMsg, levents);
2.64 frystyk 992: if (rv == SOCKET_ERROR) {
993: status = -1 ;
994: if (PROT_TRACE)
995: TTYPrint(TDEST, "HTDoListen.. WSAAsyncSelect() fails: %d\n",
996: WSAGetLastError());
2.56 frystyk 997: } /* error returns */
2.64 frystyk 998: #else
999: int enable = 1 ;
1000: status = IOCTL(net->sockfd, FIONBIO, &enable);
1001: #endif
2.56 frystyk 1002: } /* end scope */
1003: #else
1004: #if defined(VMS)
1005: {
1006: int enable = 1;
1007: status = IOCTL(net->sockfd, FIONBIO, &enable);
1008: }
1009: #else
1010: if((status = FCNTL(net->sockfd, F_GETFL, 0)) != -1) {
1011: status |= O_NONBLOCK; /* POSIX */
1012: status = FCNTL(net->sockfd, F_SETFL, status);
1013: }
1014: #endif /* VMS */
1015: #endif /* WINDOW */
1016: if (PROT_TRACE) {
1017: if (status == -1)
2.61 frystyk 1018: TTYPrint(TDEST, "HTDoListen.. Blocking socket\n");
2.56 frystyk 1019: else
2.61 frystyk 1020: TTYPrint(TDEST, "HTDoListen.. Non-blocking socket\n");
2.56 frystyk 1021: }
1022: }
1023: net->tcpstate = TCP_NEED_BIND;
1024: break;
1025:
1026: case TCP_NEED_BIND:
1027: status = bind(net->sockfd, (struct sockaddr *) &net->sock_addr,
1028: sizeof(net->sock_addr));
1029: #ifdef _WINSOCKAPI_
1030: if (status == SOCKET_ERROR)
1031: #else
1032: if (status < 0)
1033: #endif
1034: {
1035: if (PROT_TRACE)
2.61 frystyk 1036: TTYPrint(TDEST, "Bind........ failed %d\n", socerrno);
2.56 frystyk 1037: net->tcpstate = TCP_ERROR;
1038: } else
1039: net->tcpstate = TCP_NEED_LISTEN;
1040: break;
1041:
1042: case TCP_NEED_LISTEN:
1043: status = listen(net->sockfd, HT_BACKLOG);
1044: #ifdef _WINSOCKAPI_
1045: if (status == SOCKET_ERROR)
1046: #else
1047: if (status < 0)
2.36 frystyk 1048: #endif
2.56 frystyk 1049: net->tcpstate = TCP_ERROR;
1050: else
1051: net->tcpstate = TCP_CONNECTED;
1052: break;
1053:
1054: case TCP_CONNECTED:
1055: net->tcpstate = TCP_BEGIN;
1056: if (PROT_TRACE)
2.61 frystyk 1057: TTYPrint(TDEST, "HTDoListen.. Bind and listen port %d on %s\n",
2.56 frystyk 1058: (int) ntohs(net->sock_addr.sin_port),
1059: HTInetString(&net->sock_addr));
1060: return HT_OK;
1061: break;
2.13 frystyk 1062:
2.56 frystyk 1063: case TCP_NEED_CONNECT:
1064: case TCP_DNS:
1065: case TCP_ERROR:
2.61 frystyk 1066: if (PROT_TRACE) TTYPrint(TDEST, "HTDoListen.. Connect failed\n");
2.62 frystyk 1067: HTRequest_addSystemError(net->request, ERR_FATAL, socerrno, NO, "HTDoListen");
2.56 frystyk 1068: net->tcpstate = TCP_BEGIN;
1069: return HT_ERROR;
1070: break;
1071: }
2.38 frystyk 1072: }
1.1 timbl 1073: }
1074:
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