/src/sudo/lib/iolog/host_port.c

Source
/*
 * SPDX-License-Identifier: ISC
 *
 * Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>
 *
 * 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 <config.h>

#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include <compat/stdbool.h>
#endif /* HAVE_STDBOOL_H */
#include <stdio.h>
#include <string.h>
#include <time.h>

#include <sudo_compat.h>
#include <sudo_debug.h>
#include <sudo_gettext.h>
#include <sudo_util.h>
#include <sudo_iolog.h>

/*
 * Parse a string in the form host[:port] where host can also be
 * an IPv4 address or an IPv6 address in square brackets.
 * Fills in hostp and portp which may point within str, which is modified.
 */
bool
iolog_parse_host_port(char *str, char **hostp, char **portp, bool *tlsp,
     const char *defport, const char *defport_tls)
{
    char *flags, *port, *host = str;
    bool ret = false;
    bool tls = false;
    debug_decl(iolog_parse_host_port, SUDO_DEBUG_UTIL);

    /* Check for IPv6 address like [::0] followed by optional port */
    if (*host == '[') {
  host++;
  port = strchr(host, ']');
  if (port == NULL) {
      sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
    "invalid IPv6 address %s", str);
      goto done;
  }
  *port++ = '\0';
        switch (*port) {
        case ':':
            port++;
            break;
        case '\0':
            port = NULL;   /* no port specified */
            break;
        case '(':
            /* flag, handled below */
            break;
        default:
      sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
    "invalid IPv6 address %s", str);
      goto done;
  }
    } else {
  port = strrchr(host, ':');
  if (port != NULL)
      *port++ = '\0';
    }

    /* Check for optional tls flag at the end. */
    flags = strchr(port ? port : host, '(');
    if (flags != NULL) {
  if (strcasecmp(flags, "(tls)") == 0)
      tls = true;
  *flags = '\0';
  if (port == flags)
      port = NULL;
    }

    if (port == NULL)
  port = tls ? (char *)defport_tls : (char *)defport;
    else if (*port == '\0')
  goto done;

    *hostp = host;
    *portp = port;
    *tlsp = tls;

    ret = true;

done:
    debug_return_bool(ret);
}

Line	Count	Source
1		/*
2		* SPDX-License-Identifier: ISC
3		*
4		* Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>
5		*
6		* Permission to use, copy, modify, and distribute this software for any
7		* purpose with or without fee is hereby granted, provided that the above
8		* copyright notice and this permission notice appear in all copies.
9		*
10		* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11		* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12		* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13		* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14		* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15		* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16		* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17		*/
18
19		#include <config.h>
20
21		#ifdef HAVE_STDBOOL_H
22		# include <stdbool.h>
23		#else
24		# include <compat/stdbool.h>
25		#endif /* HAVE_STDBOOL_H */
26		#include <stdio.h>
27		#include <string.h>
28		#include <time.h>
29
30		#include <sudo_compat.h>
31		#include <sudo_debug.h>
32		#include <sudo_gettext.h>
33		#include <sudo_util.h>
34		#include <sudo_iolog.h>
35
36		/*
37		* Parse a string in the form host[:port] where host can also be
38		* an IPv4 address or an IPv6 address in square brackets.
39		* Fills in hostp and portp which may point within str, which is modified.
40		*/
41		bool
42		iolog_parse_host_port(char str, char hostp, char portp, bool tlsp,
43		const char defport, const char defport_tls)
44	1.89k	{
45	1.89k	char flags, port, *host = str;
46	1.89k	bool ret = false;
47	1.89k	bool tls = false;
48	1.89k	debug_decl(iolog_parse_host_port, SUDO_DEBUG_UTIL);
49
50		/* Check for IPv6 address like [::0] followed by optional port */
51	1.89k	if (*host == '[') {
52	12	host++;
53	12	port = strchr(host, ']');
54	12	if (port == NULL) {
55	1	sudo_debug_printf(SUDO_DEBUG_ERROR\|SUDO_DEBUG_LINENO,
56	1	"invalid IPv6 address %s", str);
57	1	goto done;
58	1	}
59	11	*port++ = '\0';
60	11	switch (*port) {
61	8	case ':':
62	8	port++;
63	8	break;
64	1	case '\0':
65	1	port = NULL; /* no port specified */
66	1	break;
67	1	case '(':
68		/* flag, handled below */
69	1	break;
70	1	default:
71	1	sudo_debug_printf(SUDO_DEBUG_ERROR\|SUDO_DEBUG_LINENO,
72	1	"invalid IPv6 address %s", str);
73	1	goto done;
74	11	}
75	1.88k	} else {
76	1.88k	port = strrchr(host, ':');
77	1.88k	if (port != NULL)
78	1.82k	*port++ = '\0';
79	1.88k	}
80
81		/* Check for optional tls flag at the end. */
82	1.89k	flags = strchr(port ? port : host, '(');
83	1.89k	if (flags != NULL) {
84	108	if (strcasecmp(flags, "(tls)") == 0)
85	61	tls = true;
86	108	*flags = '\0';
87	108	if (port == flags)
88	3	port = NULL;
89	108	}
90
91	1.89k	if (port == NULL)
92	67	port = tls ? (char )defport_tls : (char )defport;
93	1.83k	else if (*port == '\0')
94	2	goto done;
95
96	1.89k	*hostp = host;
97	1.89k	*portp = port;
98	1.89k	*tlsp = tls;
99
100	1.89k	ret = true;
101
102	1.89k	done:
103		debug_return_bool(ret);
104	1.89k	}

Coverage Report

Created: 2025-10-10 07:09