815 lines
18 KiB
C
815 lines
18 KiB
C
/*
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* Copyright (c) 1997-2000 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "push_locl.h"
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RCSID("$Id: push.c,v 1.44 2001/02/20 01:44:47 assar Exp $");
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#ifdef KRB4
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static int use_v4 = -1;
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#endif
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#ifdef KRB5
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static int use_v5 = -1;
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static krb5_context context;
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#endif
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static char *port_str;
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static int verbose_level;
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static int do_fork;
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static int do_leave;
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static int do_version;
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static int do_help;
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static int do_from;
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static int do_count;
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static char *header_str;
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struct getargs args[] = {
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#ifdef KRB4
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{ "krb4", '4', arg_flag, &use_v4, "Use Kerberos V4",
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NULL },
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#endif
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#ifdef KRB5
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{ "krb5", '5', arg_flag, &use_v5, "Use Kerberos V5",
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NULL },
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#endif
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{ "verbose",'v', arg_counter, &verbose_level, "Verbose",
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NULL },
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{ "fork", 'f', arg_flag, &do_fork, "Fork deleting proc",
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NULL },
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{ "leave", 'l', arg_flag, &do_leave, "Leave mail on server",
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NULL },
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{ "port", 'p', arg_string, &port_str, "Use this port",
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"number-or-service" },
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{ "from", 0, arg_flag, &do_from, "Behave like from",
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NULL },
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{ "headers", 0, arg_string, &header_str, "Headers to print", NULL },
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{ "count", 'c', arg_flag, &do_count, "Print number of messages", NULL},
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{ "version", 0, arg_flag, &do_version, "Print version",
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NULL },
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{ "help", 0, arg_flag, &do_help, NULL,
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NULL }
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};
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static void
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usage (int ret)
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{
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arg_printusage (args,
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sizeof(args) / sizeof(args[0]),
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NULL,
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"[[{po:username[@hostname] | hostname[:username]}] ...] "
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"filename");
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exit (ret);
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}
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static int
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do_connect (const char *hostname, int port, int nodelay)
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{
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struct addrinfo *ai, *a;
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struct addrinfo hints;
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int error;
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int s = -1;
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char portstr[NI_MAXSERV];
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memset (&hints, 0, sizeof(hints));
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = IPPROTO_TCP;
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snprintf (portstr, sizeof(portstr), "%u", ntohs(port));
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error = getaddrinfo (hostname, portstr, &hints, &ai);
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if (error)
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errx (1, "getaddrinfo(%s): %s", hostname, gai_strerror(error));
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for (a = ai; a != NULL; a = a->ai_next) {
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s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
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if (s < 0)
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continue;
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if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
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warn ("connect(%s)", hostname);
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close (s);
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continue;
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}
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break;
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}
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freeaddrinfo (ai);
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if (a == NULL) {
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warnx ("failed to contact %s", hostname);
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return -1;
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}
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if(setsockopt(s, IPPROTO_TCP, TCP_NODELAY,
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(void *)&nodelay, sizeof(nodelay)) < 0)
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err (1, "setsockopt TCP_NODELAY");
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return s;
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}
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typedef enum { INIT = 0, GREET, USER, PASS, STAT, RETR, TOP,
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DELE, XDELE, QUIT} pop_state;
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#define PUSH_BUFSIZ 65536
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#define STEP 16
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struct write_state {
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struct iovec *iovecs;
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size_t niovecs, maxiovecs, allociovecs;
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int fd;
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};
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static void
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write_state_init (struct write_state *w, int fd)
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{
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#ifdef UIO_MAXIOV
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w->maxiovecs = UIO_MAXIOV;
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#else
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w->maxiovecs = 16;
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#endif
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w->allociovecs = min(STEP, w->maxiovecs);
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w->niovecs = 0;
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w->iovecs = emalloc(w->allociovecs * sizeof(*w->iovecs));
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w->fd = fd;
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}
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static void
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write_state_add (struct write_state *w, void *v, size_t len)
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{
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if(w->niovecs == w->allociovecs) {
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if(w->niovecs == w->maxiovecs) {
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if(writev (w->fd, w->iovecs, w->niovecs) < 0)
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err(1, "writev");
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w->niovecs = 0;
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} else {
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w->allociovecs = min(w->allociovecs + STEP, w->maxiovecs);
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w->iovecs = erealloc (w->iovecs,
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w->allociovecs * sizeof(*w->iovecs));
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}
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}
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w->iovecs[w->niovecs].iov_base = v;
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w->iovecs[w->niovecs].iov_len = len;
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++w->niovecs;
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}
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static void
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write_state_flush (struct write_state *w)
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{
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if (w->niovecs) {
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if (writev (w->fd, w->iovecs, w->niovecs) < 0)
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err (1, "writev");
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w->niovecs = 0;
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}
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}
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static void
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write_state_destroy (struct write_state *w)
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{
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free (w->iovecs);
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}
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static int
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doit(int s,
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const char *host,
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const char *user,
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const char *outfilename,
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const char *header_str,
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int leavep,
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int verbose,
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int forkp)
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{
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int ret;
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char out_buf[PUSH_BUFSIZ];
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size_t out_len = 0;
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char in_buf[PUSH_BUFSIZ + 1]; /* sentinel */
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size_t in_len = 0;
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char *in_ptr = in_buf;
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pop_state state = INIT;
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unsigned count, bytes;
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unsigned asked_for = 0, retrieved = 0, asked_deleted = 0, deleted = 0;
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unsigned sent_xdele = 0;
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int out_fd;
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char from_line[128];
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size_t from_line_length;
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time_t now;
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struct write_state write_state;
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int numheaders = 1;
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char **headers = NULL;
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int i;
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char *tmp = NULL;
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if (do_from) {
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char *tmp2;
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tmp2 = tmp = estrdup(header_str);
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out_fd = -1;
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if (verbose)
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fprintf (stderr, "%s@%s\n", user, host);
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while (*tmp != '\0') {
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tmp = strchr(tmp, ',');
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if (tmp == NULL)
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break;
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tmp++;
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numheaders++;
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}
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headers = emalloc(sizeof(char *) * (numheaders + 1));
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for (i = 0; i < numheaders; i++) {
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headers[i] = strtok_r(tmp2, ",", &tmp2);
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}
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headers[numheaders] = NULL;
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} else {
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out_fd = open(outfilename, O_WRONLY | O_APPEND | O_CREAT, 0666);
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if (out_fd < 0)
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err (1, "open %s", outfilename);
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if (verbose)
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fprintf (stderr, "%s@%s -> %s\n", user, host, outfilename);
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}
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now = time(NULL);
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from_line_length = snprintf (from_line, sizeof(from_line),
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"From %s %s", "push", ctime(&now));
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out_len = snprintf (out_buf, sizeof(out_buf),
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"USER %s\r\nPASS hej\r\nSTAT\r\n",
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user);
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if (net_write (s, out_buf, out_len) != out_len)
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err (1, "write");
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if (verbose > 1)
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write (STDERR_FILENO, out_buf, out_len);
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if (!do_from)
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write_state_init (&write_state, out_fd);
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while(state != QUIT) {
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fd_set readset, writeset;
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FD_ZERO(&readset);
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FD_ZERO(&writeset);
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if (s >= FD_SETSIZE)
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errx (1, "fd too large");
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FD_SET(s,&readset);
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if (((state == STAT || state == RETR || state == TOP)
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&& asked_for < count)
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|| (state == XDELE && !sent_xdele)
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|| (state == DELE && asked_deleted < count))
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FD_SET(s,&writeset);
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ret = select (s + 1, &readset, &writeset, NULL, NULL);
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if (ret < 0) {
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if (errno == EAGAIN)
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continue;
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else
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err (1, "select");
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}
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if (FD_ISSET(s, &readset)) {
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char *beg, *p;
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size_t rem;
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int blank_line = 0;
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ret = read (s, in_ptr, sizeof(in_buf) - in_len - 1);
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if (ret < 0)
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err (1, "read");
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else if (ret == 0)
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errx (1, "EOF during read");
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in_len += ret;
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in_ptr += ret;
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*in_ptr = '\0';
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beg = in_buf;
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rem = in_len;
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while(rem > 1
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&& (p = strstr(beg, "\r\n")) != NULL) {
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if (state == TOP) {
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char *copy = beg;
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for (i = 0; i < numheaders; i++) {
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size_t len;
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len = min(p - copy + 1, strlen(headers[i]));
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if (strncasecmp(copy, headers[i], len) == 0) {
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fprintf (stdout, "%.*s\n", (int)(p - copy), copy);
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}
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}
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if (beg[0] == '.' && beg[1] == '\r' && beg[2] == '\n') {
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if (numheaders > 1)
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fprintf (stdout, "\n");
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state = STAT;
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if (++retrieved == count) {
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state = QUIT;
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net_write (s, "QUIT\r\n", 6);
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if (verbose > 1)
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net_write (STDERR_FILENO, "QUIT\r\n", 6);
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}
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}
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rem -= p - beg + 2;
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beg = p + 2;
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} else if (state == RETR) {
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char *copy = beg;
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if (beg[0] == '.') {
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if (beg[1] == '\r' && beg[2] == '\n') {
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if(!blank_line)
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write_state_add(&write_state, "\n", 1);
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state = STAT;
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rem -= p - beg + 2;
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beg = p + 2;
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if (++retrieved == count) {
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write_state_flush (&write_state);
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if (fsync (out_fd) < 0)
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err (1, "fsync");
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close(out_fd);
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if (leavep) {
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state = QUIT;
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net_write (s, "QUIT\r\n", 6);
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if (verbose > 1)
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net_write (STDERR_FILENO, "QUIT\r\n", 6);
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} else {
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if (forkp) {
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pid_t pid;
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pid = fork();
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if (pid < 0)
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warn ("fork");
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else if(pid != 0) {
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if(verbose)
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fprintf (stderr,
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"(exiting)");
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return 0;
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}
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}
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state = XDELE;
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if (verbose)
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fprintf (stderr, "deleting... ");
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}
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}
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continue;
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} else
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++copy;
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}
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*p = '\n';
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if(blank_line &&
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strncmp(copy, "From ", min(p - copy + 1, 5)) == 0)
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write_state_add(&write_state, ">", 1);
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write_state_add(&write_state, copy, p - copy + 1);
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blank_line = (*copy == '\n');
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rem -= p - beg + 2;
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beg = p + 2;
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} else if (rem >= 3 && strncmp (beg, "+OK", 3) == 0) {
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if (state == STAT) {
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if (!do_from)
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write_state_add(&write_state,
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from_line, from_line_length);
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blank_line = 0;
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if (do_from)
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state = TOP;
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else
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state = RETR;
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} else if (state == XDELE) {
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state = QUIT;
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net_write (s, "QUIT\r\n", 6);
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if (verbose > 1)
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net_write (STDERR_FILENO, "QUIT\r\n", 6);
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break;
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} else if (state == DELE) {
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if (++deleted == count) {
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state = QUIT;
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net_write (s, "QUIT\r\n", 6);
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if (verbose > 1)
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net_write (STDERR_FILENO, "QUIT\r\n", 6);
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break;
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}
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} else if (++state == STAT) {
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if(sscanf (beg + 4, "%u %u", &count, &bytes) != 2)
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errx(1, "Bad STAT-line: %.*s", (int)(p - beg), beg);
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if (verbose) {
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fprintf (stderr, "%u message(s) (%u bytes). "
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"fetching... ",
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count, bytes);
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if (do_from)
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fprintf (stderr, "\n");
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} else if (do_count) {
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fprintf (stderr, "%u message(s) (%u bytes).\n",
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count, bytes);
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}
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if (count == 0) {
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state = QUIT;
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net_write (s, "QUIT\r\n", 6);
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if (verbose > 1)
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net_write (STDERR_FILENO, "QUIT\r\n", 6);
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break;
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}
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}
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rem -= p - beg + 2;
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beg = p + 2;
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} else {
|
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if(state == XDELE) {
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state = DELE;
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rem -= p - beg + 2;
|
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beg = p + 2;
|
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} else
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errx (1, "Bad response: %.*s", (int)(p - beg), beg);
|
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}
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}
|
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if (!do_from)
|
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write_state_flush (&write_state);
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|
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memmove (in_buf, beg, rem);
|
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in_len = rem;
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in_ptr = in_buf + rem;
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}
|
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if (FD_ISSET(s, &writeset)) {
|
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if ((state == STAT && !do_from) || state == RETR)
|
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out_len = snprintf (out_buf, sizeof(out_buf),
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"RETR %u\r\n", ++asked_for);
|
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else if ((state == STAT && do_from) || state == TOP)
|
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out_len = snprintf (out_buf, sizeof(out_buf),
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"TOP %u 0\r\n", ++asked_for);
|
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else if(state == XDELE) {
|
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out_len = snprintf(out_buf, sizeof(out_buf),
|
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"XDELE %u %u\r\n", 1, count);
|
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sent_xdele++;
|
|
}
|
|
else if(state == DELE)
|
|
out_len = snprintf (out_buf, sizeof(out_buf),
|
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"DELE %u\r\n", ++asked_deleted);
|
|
if (net_write (s, out_buf, out_len) != out_len)
|
|
err (1, "write");
|
|
if (verbose > 1)
|
|
write (STDERR_FILENO, out_buf, out_len);
|
|
}
|
|
}
|
|
if (verbose)
|
|
fprintf (stderr, "Done\n");
|
|
if (do_from) {
|
|
free (tmp);
|
|
free (headers);
|
|
} else {
|
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write_state_destroy (&write_state);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef KRB5
|
|
static int
|
|
do_v5 (const char *host,
|
|
int port,
|
|
const char *user,
|
|
const char *filename,
|
|
const char *header_str,
|
|
int leavep,
|
|
int verbose,
|
|
int forkp)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_auth_context auth_context = NULL;
|
|
krb5_principal server;
|
|
int s;
|
|
|
|
s = do_connect (host, port, 1);
|
|
if (s < 0)
|
|
return 1;
|
|
|
|
ret = krb5_sname_to_principal (context,
|
|
host,
|
|
"pop",
|
|
KRB5_NT_SRV_HST,
|
|
&server);
|
|
if (ret) {
|
|
warnx ("krb5_sname_to_principal: %s",
|
|
krb5_get_err_text (context, ret));
|
|
return 1;
|
|
}
|
|
|
|
ret = krb5_sendauth (context,
|
|
&auth_context,
|
|
&s,
|
|
"KPOPV1.0",
|
|
NULL,
|
|
server,
|
|
0,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL);
|
|
krb5_free_principal (context, server);
|
|
if (ret) {
|
|
warnx ("krb5_sendauth: %s",
|
|
krb5_get_err_text (context, ret));
|
|
return 1;
|
|
}
|
|
return doit (s, host, user, filename, header_str, leavep, verbose, forkp);
|
|
}
|
|
#endif
|
|
|
|
#ifdef KRB4
|
|
static int
|
|
do_v4 (const char *host,
|
|
int port,
|
|
const char *user,
|
|
const char *filename,
|
|
const char *header_str,
|
|
int leavep,
|
|
int verbose,
|
|
int forkp)
|
|
{
|
|
KTEXT_ST ticket;
|
|
MSG_DAT msg_data;
|
|
CREDENTIALS cred;
|
|
des_key_schedule sched;
|
|
int s;
|
|
int ret;
|
|
|
|
s = do_connect (host, port, 1);
|
|
if (s < 0)
|
|
return 1;
|
|
ret = krb_sendauth(0,
|
|
s,
|
|
&ticket,
|
|
"pop",
|
|
(char *)host,
|
|
krb_realmofhost(host),
|
|
getpid(),
|
|
&msg_data,
|
|
&cred,
|
|
sched,
|
|
NULL,
|
|
NULL,
|
|
"KPOPV0.1");
|
|
if(ret) {
|
|
warnx("krb_sendauth: %s", krb_get_err_text(ret));
|
|
return 1;
|
|
}
|
|
return doit (s, host, user, filename, header_str, leavep, verbose, forkp);
|
|
}
|
|
#endif /* KRB4 */
|
|
|
|
#ifdef HESIOD
|
|
|
|
#ifdef HESIOD_INTERFACES
|
|
|
|
static char *
|
|
hesiod_get_pobox (const char **user)
|
|
{
|
|
void *context;
|
|
struct hesiod_postoffice *hpo;
|
|
char *ret = NULL;
|
|
|
|
if(hesiod_init (&context) != 0)
|
|
err (1, "hesiod_init");
|
|
|
|
hpo = hesiod_getmailhost (context, *user);
|
|
if (hpo == NULL) {
|
|
warn ("hesiod_getmailhost %s", *user);
|
|
} else {
|
|
if (strcasecmp(hpo->hesiod_po_type, "pop") != 0)
|
|
errx (1, "Unsupported po type %s", hpo->hesiod_po_type);
|
|
|
|
ret = estrdup(hpo->hesiod_po_host);
|
|
*user = estrdup(hpo->hesiod_po_name);
|
|
hesiod_free_postoffice (context, hpo);
|
|
}
|
|
hesiod_end (context);
|
|
return ret;
|
|
}
|
|
|
|
#else /* !HESIOD_INTERFACES */
|
|
|
|
static char *
|
|
hesiod_get_pobox (const char **user)
|
|
{
|
|
char *ret = NULL;
|
|
struct hes_postoffice *hpo;
|
|
|
|
hpo = hes_getmailhost (*user);
|
|
if (hpo == NULL) {
|
|
warn ("hes_getmailhost %s", *user);
|
|
} else {
|
|
if (strcasecmp(hpo->po_type, "pop") != 0)
|
|
errx (1, "Unsupported po type %s", hpo->po_type);
|
|
|
|
ret = estrdup(hpo->po_host);
|
|
*user = estrdup(hpo->po_name);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#endif /* HESIOD_INTERFACES */
|
|
|
|
#endif /* HESIOD */
|
|
|
|
static char *
|
|
get_pobox (const char **user)
|
|
{
|
|
char *ret = NULL;
|
|
|
|
#ifdef HESIOD
|
|
ret = hesiod_get_pobox (user);
|
|
#endif
|
|
|
|
if (ret == NULL)
|
|
ret = getenv("MAILHOST");
|
|
if (ret == NULL)
|
|
errx (1, "MAILHOST not set");
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
parse_pobox (char *a0, const char **host, const char **user)
|
|
{
|
|
const char *h, *u;
|
|
char *p;
|
|
int po = 0;
|
|
|
|
if (a0 == NULL) {
|
|
|
|
*user = getenv ("USERNAME");
|
|
if (*user == NULL) {
|
|
struct passwd *pwd = getpwuid (getuid ());
|
|
|
|
if (pwd == NULL)
|
|
errx (1, "Who are you?");
|
|
*user = estrdup (pwd->pw_name);
|
|
}
|
|
*host = get_pobox (user);
|
|
return;
|
|
}
|
|
|
|
/* if the specification starts with po:, remember this information */
|
|
if(strncmp(a0, "po:", 3) == 0) {
|
|
a0 += 3;
|
|
po++;
|
|
}
|
|
/* if there is an `@', the hostname is after it, otherwise at the
|
|
beginning of the string */
|
|
p = strchr(a0, '@');
|
|
if(p != NULL) {
|
|
*p++ = '\0';
|
|
h = p;
|
|
} else {
|
|
h = a0;
|
|
}
|
|
/* if there is a `:', the username comes before it, otherwise at
|
|
the beginning of the string */
|
|
p = strchr(a0, ':');
|
|
if(p != NULL) {
|
|
*p++ = '\0';
|
|
u = p;
|
|
} else {
|
|
u = a0;
|
|
}
|
|
if(h == u) {
|
|
/* some inconsistent compatibility with various mailers */
|
|
if(po) {
|
|
h = get_pobox (&u);
|
|
} else {
|
|
u = get_default_username ();
|
|
if (u == NULL)
|
|
errx (1, "Who are you?");
|
|
}
|
|
}
|
|
*host = h;
|
|
*user = u;
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int port = 0;
|
|
int optind = 0;
|
|
int ret = 1;
|
|
const char *host, *user, *filename = NULL;
|
|
char *pobox = NULL;
|
|
|
|
setprogname (argv[0]);
|
|
|
|
#ifdef KRB5
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
ret = krb5_init_context (&context);
|
|
if (ret)
|
|
errx (1, "krb5_init_context failed: %d", ret);
|
|
}
|
|
#endif
|
|
|
|
if (getarg (args, sizeof(args) / sizeof(args[0]), argc, argv,
|
|
&optind))
|
|
usage (1);
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
#if defined(KRB4) && defined(KRB5)
|
|
if(use_v4 == -1 && use_v5 == 1)
|
|
use_v4 = 0;
|
|
if(use_v5 == -1 && use_v4 == 1)
|
|
use_v5 = 0;
|
|
#endif
|
|
|
|
if (do_help)
|
|
usage (0);
|
|
|
|
if (do_version) {
|
|
print_version(NULL);
|
|
return 0;
|
|
}
|
|
|
|
if (do_from && header_str == NULL)
|
|
header_str = "From:";
|
|
else if (header_str != NULL)
|
|
do_from = 1;
|
|
|
|
if (do_from) {
|
|
if (argc == 0)
|
|
pobox = NULL;
|
|
else if (argc == 1)
|
|
pobox = argv[0];
|
|
else
|
|
usage (1);
|
|
} else {
|
|
if (argc == 1) {
|
|
filename = argv[0];
|
|
pobox = NULL;
|
|
} else if (argc == 2) {
|
|
filename = argv[1];
|
|
pobox = argv[0];
|
|
} else
|
|
usage (1);
|
|
}
|
|
|
|
if (port_str) {
|
|
struct servent *s = roken_getservbyname (port_str, "tcp");
|
|
|
|
if (s)
|
|
port = s->s_port;
|
|
else {
|
|
char *ptr;
|
|
|
|
port = strtol (port_str, &ptr, 10);
|
|
if (port == 0 && ptr == port_str)
|
|
errx (1, "Bad port `%s'", port_str);
|
|
port = htons(port);
|
|
}
|
|
}
|
|
if (port == 0) {
|
|
#ifdef KRB5
|
|
port = krb5_getportbyname (context, "kpop", "tcp", 1109);
|
|
#elif defined(KRB4)
|
|
port = k_getportbyname ("kpop", "tcp", htons(1109));
|
|
#else
|
|
#error must define KRB4 or KRB5
|
|
#endif
|
|
}
|
|
|
|
parse_pobox (pobox, &host, &user);
|
|
|
|
#ifdef KRB5
|
|
if (ret && use_v5) {
|
|
ret = do_v5 (host, port, user, filename, header_str,
|
|
do_leave, verbose_level, do_fork);
|
|
}
|
|
#endif
|
|
|
|
#ifdef KRB4
|
|
if (ret && use_v4) {
|
|
ret = do_v4 (host, port, user, filename, header_str,
|
|
do_leave, verbose_level, do_fork);
|
|
}
|
|
#endif /* KRB4 */
|
|
return ret;
|
|
}
|