/*
* client.c -- connect to a server
*
- * $Id$
- *
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
# include <arpa/inet.h>
#endif
-#ifdef HESIOD
-# include <hesiod.h>
-#endif
-
-#ifdef KPOP
-# include <krb.h>
-# include <ctype.h>
-#endif /* KPOP */
-
#define TRUE 1
#define FALSE 0
-#define OOPS1 (-2)
-#define OOPS2 (-3)
-
#define MAXARGS 1000
-#define MAXNETS 5
-#define MAXHOSTS 25
-
-struct addrent {
- int a_addrtype; /* assumes AF_INET for inet_netof () */
- union {
- int un_net;
- char un_addr[14];
- } un;
-};
-
-#define a_net un.un_net
-#define a_addr un.un_addr
-
-static struct addrent *n1, *n2;
-static struct addrent nets[MAXNETS];
-static struct addrent *h1, *h2;
-static struct addrent hosts[MAXHOSTS];
-
-#ifdef KPOP
-static CREDENTIALS cred;
-static MSG_DAT msg_data;
-static KTEXT ticket = (KTEXT) NULL;
-static Key_schedule schedule;
-static char *kservice; /* "pop" if using kpop */
-char krb_realm[REALM_SZ];
-char *PrincipalHostname();
-#endif /* KPOP */
-
-#if !defined(h_addr)
-# define h_addr h_addr_list[0]
-#endif
-
-#define inaddr_copy(hp,sin) \
- memcpy(&((sin)->sin_addr), (hp)->h_addr, (hp)->h_length)
/*
* static prototypes
*/
-static int rcaux (struct servent *, struct hostent *, int, char *, int);
-static int getport (int, int, char *, int);
-static int inet (struct hostent *, int);
-struct hostent *gethostbystring (char *s);
/* client's own static version of several nmh subroutines */
static char **client_brkstring (char *, char *, char *);
static int client_brkany (char, char *);
static char **client_copyip (char **, char **, int);
static char *client_getcpy (char *);
+static void client_freelist(char **);
int
-client (char *args, char *protocol, char *service, int rproto,
- char *response, int len_response)
+client (char *args, char *service, char *response, int len_response, int debug)
{
- int sd;
- register char **ap;
- char *arguments[MAXARGS];
- register struct hostent *hp;
- register struct servent *sp;
-#ifndef HAVE_GETHOSTBYNAME
- register struct netent *np;
-#endif
-
-#ifdef KPOP
- char *cp;
-
- kservice = service;
- if (cp = strchr (service, '/')) { /* "pop/kpop" */
- *cp++ = '\0'; /* kservice = "pop" */
- service = cp; /* service = "kpop" */
- } else {
- kservice = NULL; /* not using KERBEROS */
- }
-#endif /* KPOP */
-
-
- if ((sp = getservbyname (service, protocol)) == NULL) {
-#ifdef HESIOD
- if ((sp = hes_getservbyname (service, protocol)) == NULL) {
- snprintf (response, len_response, "%s/%s: unknown service", protocol, service);
- return NOTOK;
- }
-#else
- snprintf (response, len_response, "%s/%s: unknown service", protocol, service);
- return NOTOK;
-#endif
- }
+ int sd, rc;
+ char **ap, *arguments[MAXARGS];
+ struct addrinfo hints, *res, *ai;
ap = arguments;
if (args != NULL && *args != 0) {
ap = client_copyip (client_brkstring (client_getcpy (args), " ", "\n"),
ap, MAXARGS);
- } else {
- if (servers != NULL && *servers != 0)
- ap = client_copyip (client_brkstring (client_getcpy (servers), " ", "\n"),
- ap, MAXARGS);
}
if (ap == arguments) {
*ap++ = client_getcpy ("localhost");
*ap = NULL;
}
- n1 = nets;
- n2 = nets + sizeof(nets) / sizeof(nets[0]);
-
- h1 = hosts;
- h2 = hosts + sizeof(hosts) / sizeof(hosts[0]);
+ memset(&hints, 0, sizeof(hints));
+#ifdef AI_ADDRCONFIG
+ hints.ai_flags = AI_ADDRCONFIG;
+#endif
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
for (ap = arguments; *ap; ap++) {
- if (**ap == '\01') {
-/*
- * the assumption here is that if the system doesn't have a
- * gethostbyname() function, it must not use DNS. So we need to look
- * into the /etc/hosts using gethostent(). There probablly aren't any
- * systems still like this, but you never know. On every system I have
- * access to, this section is ignored.
- */
-#ifndef HAVE_GETHOSTBYNAME
- if ((np = getnetbyname (*ap + 1))) {
-#ifdef HAVE_SETHOSTENT
- sethostent (1);
-#endif /* HAVE_SETHOSTENT */
- while ((hp = gethostent()))
- if (np->n_addrtype == hp->h_addrtype
- && inet (hp, np->n_net)) {
- switch (sd = rcaux (sp, hp, rproto, response, len_response)) {
- case NOTOK:
- continue;
- case OOPS1:
- break;
- case OOPS2:
- return NOTOK;
-
- default:
- return sd;
- }
- break;
- }
- }
-#endif /* don't HAVE_GETHOSTBYNAME */
- continue;
+
+ if (debug) {
+ fprintf(stderr, "Trying to connect to \"%s\" ...\n", *ap);
}
- if ((hp = gethostbystring (*ap))) {
- switch (sd = rcaux (sp, hp, rproto, response, len_response)) {
- case NOTOK:
- case OOPS1:
- break;
- case OOPS2:
- return NOTOK;
+ rc = getaddrinfo(*ap, service, &hints, &res);
- default:
- return sd;
+ if (rc) {
+ if (debug) {
+ fprintf(stderr, "Lookup of \"%s\" failed: %s\n", *ap,
+ gai_strerror(rc));
}
continue;
}
- }
-
- strncpy (response, "no servers available", len_response);
- return NOTOK;
-}
+ for (ai = res; ai != NULL; ai = ai->ai_next) {
+ if (debug) {
+ char address[NI_MAXHOST];
-static int
-rcaux (struct servent *sp, struct hostent *hp, int rproto,
- char *response, int len_response)
-{
- int sd;
- struct in_addr in;
- register struct addrent *ap;
- struct sockaddr_in in_socket;
- register struct sockaddr_in *isock = &in_socket;
-
-#ifdef KPOP
- int rem;
- struct hostent *hp2;
-#endif /* KPOP */
-
- for (ap = nets; ap < n1; ap++)
- if (ap->a_addrtype == hp->h_addrtype && inet (hp, ap->a_net))
- return NOTOK;
-
- for (ap = hosts; ap < h1; ap++)
- if (ap->a_addrtype == hp->h_addrtype
- && memcmp(ap->a_addr, hp->h_addr, hp->h_length) == 0)
- return NOTOK;
-
- if ((sd = getport (rproto, hp->h_addrtype, response, len_response)) == NOTOK)
- return OOPS2;
-
- memset (isock, 0, sizeof(*isock));
- isock->sin_family = hp->h_addrtype;
- inaddr_copy (hp, isock);
- isock->sin_port = sp->s_port;
-
- if (connect (sd, (struct sockaddr *) isock, sizeof(*isock)) == NOTOK)
- switch (errno) {
- case ENETDOWN:
- case ENETUNREACH:
- close (sd);
- if (n1 < n2) {
- n1->a_addrtype = hp->h_addrtype;
- memcpy(&in, hp->h_addr, sizeof(in));
- n1->a_net = inet_netof (in);
- n1++;
- }
- return OOPS1;
-
- case ETIMEDOUT:
- case ECONNREFUSED:
- default:
- close (sd);
- if (h1 < h2) {
- h1->a_addrtype = hp->h_addrtype;
- memcpy(h1->a_addr, hp->h_addr, hp->h_length);
- h1++;
- }
- return NOTOK;
- }
+ rc = getnameinfo(ai->ai_addr, ai->ai_addrlen, address,
+ sizeof(address), NULL, 0, NI_NUMERICHOST);
-#ifdef KPOP
- if (kservice) { /* "pop" */
- char *instance;
-
- if (( hp2 = gethostbyaddr( hp->h_addr, hp->h_length, hp->h_addrtype ))
- == NULL ) {
- return NOTOK;
- }
- if ((instance = strdup (hp2->h_name)) == NULL) {
- close (sd);
- strncpy (response, "Out of memory.", len_response);
- return OOPS2;
- }
- ticket = (KTEXT) mh_xmalloc (sizeof(KTEXT_ST));
- rem = krb_sendauth (0L, sd, ticket, kservice, instance,
- (char *) krb_realmofhost (instance),
- (unsigned long) 0, &msg_data, &cred, schedule,
- (struct sockaddr_in *) NULL,
- (struct sockaddr_in *) NULL,
- "KPOPV0.1");
- free (instance);
- if (rem != KSUCCESS) {
- close (sd);
- strncpy (response, "Post office refused connection: ", len_response);
- strncat (response, krb_err_txt[rem], len_response - strlen(response));
- return OOPS2;
- }
- }
-#endif /* KPOP */
+ fprintf(stderr, "Connecting to %s...\n",
+ rc ? "unknown" : address);
+ }
- return sd;
-}
+ sd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+ if (sd < 0) {
+ if (debug)
+ fprintf(stderr, "socket() failed: %s\n", strerror(errno));
+ continue;
+ }
-static int
-getport (int rproto, int addrtype, char *response, int len_response)
-{
- int sd, port;
- struct sockaddr_in in_socket, *isock;
-
- isock = &in_socket;
- if (rproto && addrtype != AF_INET) {
- snprintf (response, len_response, "reserved ports not supported for af=%d", addrtype);
- errno = ENOPROTOOPT;
- return NOTOK;
- }
+ if (connect(sd, ai->ai_addr, ai->ai_addrlen) == 0) {
+ freeaddrinfo(res);
+ client_freelist(ap);
+ return sd;
+ }
- if ((sd = socket (AF_INET, SOCK_STREAM, 0)) == NOTOK) {
- char *s;
+ if (debug) {
+ fprintf(stderr, "Connection failed: %s\n", strerror(errno));
+ }
- if ((s = strerror (errno)))
- snprintf (response, len_response, "unable to create socket: %s", s);
- else
- snprintf (response, len_response, "unable to create socket: unknown error");
- return NOTOK;
- }
-#ifdef KPOP
- if (kservice) /* "pop" */
- return(sd);
-#endif /* KPOP */
- if (!rproto)
- return sd;
-
- memset(isock, 0, sizeof(*isock));
- isock->sin_family = addrtype;
- for (port = IPPORT_RESERVED - 1;;) {
- isock->sin_port = htons ((unsigned short) port);
- if (bind (sd, (struct sockaddr *) isock, sizeof(*isock)) != NOTOK)
- return sd;
-
- switch (errno) {
- char *s;
-
- case EADDRINUSE:
- case EADDRNOTAVAIL:
- if (--port <= IPPORT_RESERVED / 2) {
- strncpy (response, "ports available", len_response);
- return NOTOK;
- }
- break;
-
- default:
- if ((s = strerror (errno)))
- snprintf (response, len_response, "unable to bind socket: %s", s);
- else
- snprintf (response, len_response, "unable to bind socket: unknown error");
- return NOTOK;
+ close(sd);
}
- }
-}
-
-static int
-inet (struct hostent *hp, int net)
-{
- struct in_addr in;
+ freeaddrinfo(res);
+ }
- memcpy(&in, hp->h_addr, sizeof(in));
- return (inet_netof (in) == net);
+ client_freelist(ap);
+ strncpy (response, "no servers available", len_response);
+ return NOTOK;
}
/*
- * taken from ISODE's compat/internet.c
+ * Free a list of strings
*/
-static char *empty = NULL;
-
-#ifdef h_addr
-static char *addrs[2] = { NULL };
-#endif
-
-struct hostent *
-gethostbystring (char *s)
+static void
+client_freelist(char **list)
{
- register struct hostent *h;
- static struct hostent hs;
-#ifdef DG
- static struct in_addr iaddr;
-#else
- static unsigned long iaddr;
-#endif
-
- iaddr = inet_addr (s);
-#ifdef DG
- if (iaddr.s_addr == NOTOK && strcmp (s, "255.255.255.255"))
-#else
- if (((int) iaddr == NOTOK) && strcmp (s, "255.255.255.255"))
-#endif
- return gethostbyname (s);
-
- h = &hs;
- h->h_name = s;
- h->h_aliases = ∅
- h->h_addrtype = AF_INET;
- h->h_length = sizeof(iaddr);
-#ifdef h_addr
- h->h_addr_list = addrs;
- memset(addrs, 0, sizeof(addrs));
-#endif
- h->h_addr = (char *) &iaddr;
-
- return h;
+ while (*list++ != NULL)
+ free(*list);
}
projects / mmh / blobdiff