diff options
Diffstat (limited to 'lib/iolog/host_port.c')
-rw-r--r-- | lib/iolog/host_port.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/lib/iolog/host_port.c b/lib/iolog/host_port.c new file mode 100644 index 0000000..7fcc0b0 --- /dev/null +++ b/lib/iolog/host_port.c @@ -0,0 +1,109 @@ +/* + * 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. + */ + +/* + * This is an open source non-commercial project. Dear PVS-Studio, please check it. + * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + */ + +#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); +} |