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* $Id: status.c,v 1.7.4.2 2003/06/09 14:53:16 srittau Exp $
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* Copyright (c) 1990,1993 Regents of The University of Michigan.
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* All Rights Reserved. See COPYRIGHT.
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#endif /* HAVE_CONFIG_H */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#endif /* USE_GETHOSTID */
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#include <netatalk/at.h>
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#include <netatalk/endian.h>
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#include <atalk/dsi.h>
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#include <atalk/atp.h>
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#include <atalk/asp.h>
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#include <atalk/nbp.h>
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#include "globals.h" /* includes <netdb.h> */
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#include "afp_config.h"
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static void status_flags(char *data, const int notif, const int ipok,
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const unsigned char passwdbits, const int dirsrvcs)
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status = AFPSRVRINFO_COPY;
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if (passwdbits & PASSWD_SET) /* some uams may not allow this. */
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status |= AFPSRVRINFO_PASSWD;
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if (passwdbits & PASSWD_NOSAVE)
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status |= AFPSRVRINFO_NOSAVEPASSWD;
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status |= AFPSRVRINFO_SRVSIGNATURE;
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/* only advertise tcp/ip if we have a valid address */
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status |= AFPSRVRINFO_TCPIP;
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status |= AFPSRVRINFO_SRVMSGS;
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/* Allow the user to decide if we should support server notifications.
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* With this turned off, the clients will poll for directory changes every
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* 10 seconds. This might be too costly to network resources, so make
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* this an optional thing. Default will be to _not_ support server
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status |= AFPSRVRINFO_SRVNOTIFY;
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status |= AFPSRVRINFO_FASTBOZO;
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status |= AFPSRVRINFO_SRVRDIR;
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status = htons(status);
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memcpy(data + AFPSTATUS_FLAGOFF, &status, sizeof(status));
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static int status_server(char *data, const char *server)
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char *Obj, *Type, *Zone;
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/* make room for all offsets before server name */
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data += AFPSTATUS_PRELEN;
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/* extract the obj part of the server */
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Obj = (char *) server;
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nbp_name(server, &Obj, &Type, &Zone);
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memcpy( data, Obj, len );
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if ((len + 1) & 1) /* pad server name and length byte to even boundary */
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/* Make room for signature and net address offset. Save location of
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* signature offset. We're also making room for directory names offset
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* and the utf-8 server name offset.
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* NOTE: Technically, we don't need to reserve space for the
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* signature and net address offsets if they're not going to be
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* used. As there are no offsets after them, it doesn't hurt to
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* have them specified though. So, we just do that to simplify
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* NOTE2: AFP3.1 Documentation states that the directory names offset
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* is a required feature, even though it can be set to zero.
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status = htons(len + AFPSTATUS_POSTLEN);
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memcpy(start + AFPSTATUS_MACHOFF, &status, sizeof(status));
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return len; /* return the offset to beginning of signature offset */
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static void status_machine(char *data)
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const char *machine = "afs";
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const char *machine = "unix";
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memcpy(&status, start + AFPSTATUS_MACHOFF, sizeof(status));
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data += ntohs( status );
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len = strlen( machine );
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memcpy( data, machine, len );
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status = htons(data - start);
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memcpy(start + AFPSTATUS_VERSOFF, &status, sizeof(status));
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/* server signature is a 16-byte quantity */
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static u_int16_t status_signature(char *data, int *servoffset, DSI *dsi,
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const char *hostname)
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u_int16_t offset, sigoff;
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/* get server signature offset */
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memcpy(&offset, data + *servoffset, sizeof(offset));
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sigoff = offset = ntohs(offset);
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/* jump to server signature offset */
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/* 16-byte signature consists of copies of the hostid */
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#if defined(BSD4_4) && defined(USE_GETHOSTID)
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mib[1] = KERN_HOSTID;
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len = sizeof(hostid);
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sysctl(mib, 2, &hostid, &len, NULL, 0);
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#else /* BSD4_4 && USE_GETHOSTID */
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hostid = gethostid();
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#endif /* BSD4_4 && USE_GETHOSTID */
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hostid = dsi->server.sin_addr.s_addr;
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struct hostent *host;
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if ((host = gethostbyname(hostname)))
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hostid = ((struct in_addr *) host->h_addr)->s_addr;
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/* it turns out that a server signature screws up separate
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* servers running on the same machine. to work around that,
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* i add in an increment */
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for (i = 0; i < 16; i += sizeof(hostid)) {
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memcpy(data, &hostid, sizeof(hostid));
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data += sizeof(hostid);
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/* calculate net address offset */
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*servoffset += sizeof(offset);
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offset = htons(data - status);
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memcpy(status + *servoffset, &offset, sizeof(offset));
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static int status_netaddress(char *data, int *servoffset,
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const ASP asp, const DSI *dsi,
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/* get net address offset */
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memcpy(&offset, data + *servoffset, sizeof(offset));
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data += ntohs(offset);
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len (byte = sizeof(length + address type + address)
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address type (byte, ip address = 0x01, ip + port = 0x02,
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ddp address = 0x03, fqdn = 0x04)
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address (up to 254 bytes, ip = 4, ip + port = 6, ddp = 4)
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/* number of addresses. this currently screws up if we have a dsi
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connection, but we don't have the ip address. to get around this,
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we turn off the status flag for tcp/ip. */
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*data++ = ((fqdn && dsi) ? 1 : 0) + (dsi ? 1 : 0) + (asp ? 1 : 0);
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/* handle DNS names */
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int len = strlen(fqdn);
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memcpy(data, fqdn, len);
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const struct sockaddr_in *inaddr = &dsi->server;
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if (inaddr->sin_port == htons(DSI_AFPOVERTCP_PORT)) {
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*data++ = 6; /* length */
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*data++ = 0x01; /* basic ip address */
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memcpy(data, &inaddr->sin_addr.s_addr,
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sizeof(inaddr->sin_addr.s_addr));
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data += sizeof(inaddr->sin_addr.s_addr);
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/* ip address + port */
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*data++ = 0x02; /* ip address with port */
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memcpy(data, &inaddr->sin_addr.s_addr,
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sizeof(inaddr->sin_addr.s_addr));
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data += sizeof(inaddr->sin_addr.s_addr);
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memcpy(data, &inaddr->sin_port, sizeof(inaddr->sin_port));
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data += sizeof(inaddr->sin_port);
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const struct sockaddr_at *ddpaddr = atp_sockaddr(asp->asp_atp);
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*data++ = 0x03; /* ddp address */
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memcpy(data, &ddpaddr->sat_addr.s_net, sizeof(ddpaddr->sat_addr.s_net));
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data += sizeof(ddpaddr->sat_addr.s_net);
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memcpy(data, &ddpaddr->sat_addr.s_node,
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sizeof(ddpaddr->sat_addr.s_node));
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data += sizeof(ddpaddr->sat_addr.s_node);
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memcpy(data, &ddpaddr->sat_port, sizeof(ddpaddr->sat_port));
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data += sizeof(ddpaddr->sat_port);
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#endif /* ! NO_DDP */
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/* calculate/store Directory Services Names offset */
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offset = htons(data - begin);
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*servoffset += sizeof(offset);
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memcpy(begin + *servoffset, &offset, sizeof(offset));
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/* return length of buffer */
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return (data - begin);
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static int status_directorynames(char *data, int *diroffset,
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const struct afp_options *options)
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memcpy(&offset, data + *diroffset, sizeof(offset));
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offset = ntohs(offset);
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/* I can not find documentation of any other purpose for the
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* DirectoryNames field.
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* Try to synthesize a principal:
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* service '/' fqdn '@' realm
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if (options->k5service && options->k5realm && options->fqdn) {
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/* should k5princ be utf8 encoded? */
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char *p = strchr( options->fqdn, ':' );
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len = strlen( options->k5service )
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+ strlen( options->fqdn )
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+ strlen( options->k5realm );
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len+=2; /* '/' and '@' */
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*data++ = 1; /* DirectoryNamesCount */
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snprintf( data, len + 1, "%s/%s@%s", options->k5service,
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options->fqdn, options->k5realm );
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memset(begin + *diroffset, 0, sizeof(offset));
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/* Calculate and store offset for UTF8ServerName */
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*diroffset += sizeof(u_int16_t);
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offset = htons(data - begin);
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memcpy(begin + *diroffset, &offset, sizeof(u_int16_t));
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/* return length of buffer */
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return (data - begin);
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static int status_utf8servername(char *data, int *nameoffset,
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const struct afp_options *options)
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memcpy(&offset, data + *nameoffset, sizeof(offset));
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offset = ntohs(offset);
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/* FIXME: For now we set the UTF-8 ServerName offset to 0
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* It's irrelevent anyway until we set the appropriate Flags value.
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* Later this can be set to something meaningful.
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* What is the valid character range for an nbpname?
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* Apple's server likes to use the non-qualified hostname
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* This obviously won't work very well if multiple servers are running
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memset(begin + *nameoffset, 0, sizeof(offset));
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/* return length of buffer */
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return (data - begin);
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/* returns actual offset to signature */
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static void status_icon(char *data, const unsigned char *icondata,
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const int iconlen, const int sigoffset)
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char *sigdata = data + sigoffset;
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u_int16_t ret, status;
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memcpy(&status, start + AFPSTATUS_ICONOFF, sizeof(status));
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if ( icondata == NULL ) {
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memset(start + AFPSTATUS_ICONOFF, 0, sizeof(status));
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data += ntohs( status );
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memcpy( data, icondata, iconlen);
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ret = htons(data - start);
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/* put in signature offset */
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memcpy(sigdata, &ret, sizeof(ret));
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void status_init(AFPConfig *aspconfig, AFPConfig *dsiconfig,
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const struct afp_options *options)
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int statuslen, c, sigoff;
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if (!(aspconfig || dsiconfig) || !options)
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asp = aspconfig->obj.handle;
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status = aspconfig->status;
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dsi = dsiconfig->obj.handle;
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status = dsiconfig->status;
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* These routines must be called in order -- earlier calls
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* set the offsets for later calls.
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* using structs is a bad idea, but that's what the original code
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* does. solaris, in fact, will segfault with them. so, now
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* we just use the powers of #defines and memcpy.
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* reply block layout (offsets are 16-bit quantities):
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* machine type offset -> AFP version count offset ->
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* UAM count offset -> vol icon/mask offset -> flags ->
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* server name [padded to even boundary] -> signature offset ->
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* network address offset ->
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* at the appropriate offsets:
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* machine type, afp versions, uams, server signature
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* (16-bytes), network addresses, volume icon/mask
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status_flags(status, options->server_notif, options->fqdn ||
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(dsiconfig && dsi->server.sin_addr.s_addr),
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(options->k5service && options->k5realm && options->fqdn));
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/* returns offset to signature offset */
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c = status_server(status, options->server ? options->server :
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status_machine(status);
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status_versions(status);
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status_uams(status, options->uamlist);
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if (options->flags & OPTION_CUSTOMICON)
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status_icon(status, icon, sizeof(icon), c);
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status_icon(status, apple_atalk_icon, sizeof(apple_atalk_icon), c);
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sigoff = status_signature(status, &c, dsi, options->hostname);
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/* c now contains the offset where the netaddress offset lives */
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status_netaddress(status, &c, asp, dsi, options->fqdn);
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/* c now contains the offset where the Directory Names Count offset lives */
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status_directorynames(status, &c, dsi, options);
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/* c now contains the offset where the UTF-8 ServerName offset lives */
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statuslen = status_utf8servername(status, &c, dsi, options);
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asp_setstatus(asp, status, statuslen);
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aspconfig->signature = status + sigoff;
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aspconfig->statuslen = statuslen;
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#endif /* ! NO_DDP */
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if (aspconfig) { /* copy to dsiconfig */
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memcpy(dsiconfig->status, status, ATP_MAXDATA);
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status = dsiconfig->status;
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if ((options->flags & OPTION_CUSTOMICON) == 0) {
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status_icon(status, apple_tcp_icon, sizeof(apple_tcp_icon), 0);
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dsi_setstatus(dsi, status, statuslen);
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dsiconfig->signature = status + sigoff;
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dsiconfig->statuslen = statuslen;
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/* this is the same as asp/dsi_getstatus */
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int afp_getsrvrinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
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int ibuflen, *rbuflen;
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AFPConfig *config = obj->config;
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memcpy(rbuf, config->status, config->statuslen);
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*rbuflen = config->statuslen;
added
removed
etc/afpd/status.c
