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/*
* Copyright (c) 2014 Sunil Nimmagadda <sunil@nimmagadda.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "pop3d.h"
int debug = 0;
void
set_nonblocking(int fd)
{
int flags;
if ((flags = fcntl(fd, F_GETFL, 0)) == -1)
fatal("fcntl F_GETFL");
flags |= O_NONBLOCK;
if ((flags = fcntl(fd, F_SETFL, flags)) == -1)
fatal("fcntl F_SETFL");
}
void
log_init(int n_debug)
{
extern char *__progname;
debug = n_debug;
if (!debug)
openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
tzset();
}
void
fatal(const char *emsg)
{
if (errno)
logit(LOG_CRIT, "fatal: %s: %s\n", emsg, strerror(errno));
else
logit(LOG_CRIT, "fatal: %s\n", emsg);
exit(EXIT_FAILURE);
}
void
fatalx(const char *emsg)
{
errno = 0;
fatal(emsg);
}
void
logit(int pri, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vlog(pri, fmt, ap);
va_end(ap);
}
void
vlog(int pri, const char *fmt, va_list ap)
{
char *nfmt;
if (debug) {
/* best effort in out of mem situations */
if (asprintf(&nfmt, "%s\n", fmt) == -1) {
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
} else {
vfprintf(stderr, nfmt, ap);
free(nfmt);
}
fflush(stderr);
} else
vsyslog(pri, fmt, ap);
}
void *
xcalloc(size_t nmemb, size_t size, const char *where)
{
void *r;
if ((r = calloc(nmemb, size)) == NULL) {
logit(LOG_CRIT, "%s: calloc(%zu, %zu)", where, nmemb, size);
err(1, "exiting");
}
return (r);
}
int
imsgev_xcompose(struct imsgev *iev, u_int16_t type, u_int32_t peerid,
uint32_t pid, int fd, void *data, u_int16_t datalen, const char *where)
{
int r;
r = imsgev_compose(iev, type, peerid, pid, fd, data, datalen);
if (r == -1) {
logit(LOG_CRIT, "imsgev_xcompose: %s", where);
errx(1, "maildrop exiting");
}
return (r);
}
void
iobuf_xfqueue(struct iobuf *io, const char *where, const char *fmt, ...)
{
va_list ap;
int len;
va_start(ap, fmt);
len = iobuf_vfqueue(io, fmt, ap);
va_end(ap);
if (len == -1)
errx(1, "%s: iobuf_xfqueue(%p, %s, ...)", where, io, fmt);
}
void
iobuf_xqueue(struct iobuf *io, const char *where, const void *data, size_t len)
{
if (iobuf_queue(io, data, len) == -1)
errx(1, "%s: iobuf_xqueue(%p, data, %zu)", where, io, len);
}
int
get_index(struct session *s, const char *args, unsigned int *idx)
{
const char *errstr;
*idx = strtonum(args, 1, UINT_MAX, &errstr);
if (errstr || *idx < 1 || *idx > s->nmsgs) {
logit(LOG_INFO, "%zu: Invalid index", s->id);
session_reply(s, "%s", "-ERR invalid index");
return (0);
}
*idx -= 1; /* make it zero based */
return (1);
}
void
log_connect(uint32_t id, struct sockaddr_storage *s, socklen_t s_len)
{
char hbuf[NI_MAXHOST];
int e;
e = getnameinfo((struct sockaddr *)s, s_len, hbuf, sizeof(hbuf),
NULL, 0, NI_NUMERICHOST);
if (e) {
logit(LOG_DEBUG, "getnameinfo: %s", gai_strerror(e));
logit(LOG_INFO, "new session with id %u", id);
} else
logit(LOG_INFO, "new session with id %u from %s", id, hbuf);
}
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