Use strdup in the config file lexer to copy strings to yylval.string. This should solve the "[ERROR] unknown layer 3 protocol" problem here: https://www.spinics.net/lists/netfilter/msg58628.html Signed-off-by: Ash Hughes <sehguh.hsa@xxxxxxxxx> --- src/read_config_lex.l | 8 +++--- src/read_config_yy.y | 57 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 61 insertions(+), 4 deletions(-) diff --git a/src/read_config_lex.l b/src/read_config_lex.l index 120bc00..b0d9e61 100644 --- a/src/read_config_lex.l +++ b/src/read_config_lex.l @@ -142,9 +142,9 @@ notrack [N|n][O|o][T|t][R|r][A|a][C|c][K|k] {is_off} { return T_OFF; } {integer} { yylval.val = atoi(yytext); return T_NUMBER; } {signed_integer} { yylval.val = atoi(yytext); return T_SIGNED_NUMBER; } -{ip4} { yylval.string = yytext; return T_IP; } -{ip6} { yylval.string = yytext; return T_IP; } -{path} { yylval.string = yytext; return T_PATH_VAL; } +{ip4} { yylval.string = strdup(yytext); return T_IP; } +{ip6} { yylval.string = strdup(yytext); return T_IP; } +{path} { yylval.string = strdup(yytext); return T_PATH_VAL; } {alarm} { return T_ALARM; } {persistent} { dlog(LOG_WARNING, "Now `persistent' mode " "is called `alarm'. Please, update " @@ -156,7 +156,7 @@ notrack [N|n][O|o][T|t][R|r][A|a][C|c][K|k] "your conntrackd.conf file.\n"); return T_FTFW; } {notrack} { return T_NOTRACK; } -{string} { yylval.string = yytext; return T_STRING; } +{string} { yylval.string = strdup(yytext); return T_STRING; } {comment} ; {ws} ; diff --git a/src/read_config_yy.y b/src/read_config_yy.y index 1d510ed..1cb9cce 100644 --- a/src/read_config_yy.y +++ b/src/read_config_yy.y @@ -117,6 +117,7 @@ logfile_bool : T_LOG T_OFF logfile_path : T_LOG T_PATH_VAL { strncpy(conf.logfile, $2, FILENAME_MAXLEN); + free($2); }; syslog_bool : T_SYSLOG T_ON @@ -152,8 +153,10 @@ syslog_facility : T_SYSLOG T_STRING else { dlog(LOG_WARNING, "'%s' is not a known syslog facility, " "ignoring", $2); + free($2); break; } + free($2); if (conf.stats.syslog_facility != -1 && conf.syslog_facility != conf.stats.syslog_facility) @@ -164,6 +167,7 @@ syslog_facility : T_SYSLOG T_STRING lock : T_LOCK T_PATH_VAL { strncpy(conf.lockfile, $2, FILENAME_MAXLEN); + free($2); }; refreshtime : T_REFRESH T_NUMBER @@ -225,6 +229,7 @@ multicast_option : T_IPV4_ADDR T_IP if (!inet_aton($2, &conf.channel[conf.channel_num].u.mcast.in)) { dlog(LOG_WARNING, "%s is not a valid IPv4 address", $2); + free($2); break; } @@ -235,6 +240,7 @@ multicast_option : T_IPV4_ADDR T_IP break; } + free($2); conf.channel[conf.channel_num].u.mcast.ipproto = AF_INET; }; @@ -247,6 +253,7 @@ multicast_option : T_IPV6_ADDR T_IP &conf.channel[conf.channel_num].u.mcast.in); if (err == 0) { dlog(LOG_WARNING, "%s is not a valid IPv6 address", $2); + free($2); break; } else if (err < 0) { dlog(LOG_ERR, "inet_pton(): IPv6 unsupported!"); @@ -257,6 +264,7 @@ multicast_option : T_IPV6_ADDR T_IP dlog(LOG_WARNING, "your multicast address is IPv6 but " "is binded to an IPv4 interface? " "Surely this is not what you want"); + free($2); break; } @@ -269,12 +277,14 @@ multicast_option : T_IPV6_ADDR T_IP idx = if_nametoindex($2); if (!idx) { dlog(LOG_WARNING, "%s is an invalid interface", $2); + free($2); break; } conf.channel[conf.channel_num].u.mcast.ifa.interface_index6 = idx; conf.channel[conf.channel_num].u.mcast.ipproto = AF_INET6; } + free($2); }; multicast_option : T_IPV4_IFACE T_IP @@ -283,8 +293,10 @@ multicast_option : T_IPV4_IFACE T_IP if (!inet_aton($2, &conf.channel[conf.channel_num].u.mcast.ifa)) { dlog(LOG_WARNING, "%s is not a valid IPv4 address", $2); + free($2); break; } + free($2); if (conf.channel[conf.channel_num].u.mcast.ipproto == AF_INET6) { dlog(LOG_WARNING, "your multicast interface is IPv4 but " @@ -299,6 +311,7 @@ multicast_option : T_IPV4_IFACE T_IP multicast_option : T_IPV6_IFACE T_IP { dlog(LOG_WARNING, "`IPv6_interface' not required, ignoring"); + free($2); } multicast_option : T_IFACE T_STRING @@ -312,6 +325,7 @@ multicast_option : T_IFACE T_STRING idx = if_nametoindex($2); if (!idx) { dlog(LOG_WARNING, "%s is an invalid interface", $2); + free($2); break; } @@ -319,6 +333,8 @@ multicast_option : T_IFACE T_STRING conf.channel[conf.channel_num].u.mcast.ifa.interface_index6 = idx; conf.channel[conf.channel_num].u.mcast.ipproto = AF_INET6; } + + free($2); }; multicast_option : T_GROUP T_NUMBER @@ -390,8 +406,10 @@ udp_option : T_IPV4_ADDR T_IP if (!inet_aton($2, &conf.channel[conf.channel_num].u.udp.server.ipv4)) { dlog(LOG_WARNING, "%s is not a valid IPv4 address", $2); + free($2); break; } + free($2); conf.channel[conf.channel_num].u.udp.ipproto = AF_INET; }; @@ -404,12 +422,14 @@ udp_option : T_IPV6_ADDR T_IP &conf.channel[conf.channel_num].u.udp.server.ipv6); if (err == 0) { dlog(LOG_WARNING, "%s is not a valid IPv6 address", $2); + free($2); break; } else if (err < 0) { dlog(LOG_ERR, "inet_pton(): IPv6 unsupported!"); exit(EXIT_FAILURE); } + free($2); conf.channel[conf.channel_num].u.udp.ipproto = AF_INET6; }; @@ -419,8 +439,10 @@ udp_option : T_IPV4_DEST_ADDR T_IP if (!inet_aton($2, &conf.channel[conf.channel_num].u.udp.client)) { dlog(LOG_WARNING, "%s is not a valid IPv4 address", $2); + free($2); break; } + free($2); conf.channel[conf.channel_num].u.udp.ipproto = AF_INET; }; @@ -433,12 +455,14 @@ udp_option : T_IPV6_DEST_ADDR T_IP &conf.channel[conf.channel_num].u.udp.client); if (err == 0) { dlog(LOG_WARNING, "%s is not a valid IPv6 address", $2); + free($2); break; } else { dlog(LOG_ERR, "inet_pton(): IPv6 unsupported!"); exit(EXIT_FAILURE); } + free($2); conf.channel[conf.channel_num].u.udp.ipproto = AF_INET6; }; @@ -452,9 +476,12 @@ udp_option : T_IFACE T_STRING idx = if_nametoindex($2); if (!idx) { dlog(LOG_WARNING, "%s is an invalid interface", $2); + free($2); break; } conf.channel[conf.channel_num].u.udp.server.ipv6.scope_id = idx; + + free($2); }; udp_option : T_PORT T_NUMBER @@ -530,8 +557,10 @@ tcp_option : T_IPV4_ADDR T_IP if (!inet_aton($2, &conf.channel[conf.channel_num].u.tcp.server.ipv4)) { dlog(LOG_WARNING, "%s is not a valid IPv4 address", $2); + free($2); break; } + free($2); conf.channel[conf.channel_num].u.tcp.ipproto = AF_INET; }; @@ -544,12 +573,14 @@ tcp_option : T_IPV6_ADDR T_IP &conf.channel[conf.channel_num].u.tcp.server.ipv6); if (err == 0) { dlog(LOG_WARNING, "%s is not a valid IPv6 address", $2); + free($2); break; } else if (err < 0) { dlog(LOG_ERR, "inet_pton(): IPv6 unsupported!"); exit(EXIT_FAILURE); } + free($2); conf.channel[conf.channel_num].u.tcp.ipproto = AF_INET6; }; @@ -559,8 +590,10 @@ tcp_option : T_IPV4_DEST_ADDR T_IP if (!inet_aton($2, &conf.channel[conf.channel_num].u.tcp.client)) { dlog(LOG_WARNING, "%s is not a valid IPv4 address", $2); + free($2); break; } + free($2); conf.channel[conf.channel_num].u.tcp.ipproto = AF_INET; }; @@ -573,12 +606,14 @@ tcp_option : T_IPV6_DEST_ADDR T_IP &conf.channel[conf.channel_num].u.tcp.client); if (err == 0) { dlog(LOG_WARNING, "%s is not a valid IPv6 address", $2); + free($2); break; } else if (err < 0) { dlog(LOG_ERR, "inet_pton(): IPv6 unsupported!"); exit(EXIT_FAILURE); } + free($2); conf.channel[conf.channel_num].u.tcp.ipproto = AF_INET6; }; @@ -592,9 +627,12 @@ tcp_option : T_IFACE T_STRING idx = if_nametoindex($2); if (!idx) { dlog(LOG_WARNING, "%s is an invalid interface", $2); + free($2); break; } conf.channel[conf.channel_num].u.tcp.server.ipv6.scope_id = idx; + + free($2); }; tcp_option : T_PORT T_NUMBER @@ -652,6 +690,7 @@ unix_options: unix_option : T_PATH T_PATH_VAL { strncpy(conf.local.path, $2, PATH_MAX); + free($2); }; unix_option : T_BACKLOG T_NUMBER @@ -739,6 +778,7 @@ expect_list: expect_item: T_STRING { exp_filter_add(STATE(exp_filter), $1); + free($1); } sync_mode_alarm: T_SYNC_MODE T_ALARM '{' sync_mode_alarm_list '}' @@ -988,6 +1028,8 @@ scheduler_line : T_TYPE T_STRING dlog(LOG_ERR, "unknown scheduler `%s'", $2); exit(EXIT_FAILURE); } + + free($2); }; scheduler_line : T_PRIO T_NUMBER @@ -1065,8 +1107,10 @@ filter_protocol_item : T_STRING if (pent == NULL) { dlog(LOG_WARNING, "getprotobyname() cannot find " "protocol `%s' in /etc/protocols", $1); + free($1); break; } + free($1); ct_filter_add_proto(STATE(us_filter), pent->p_proto); __kernel_filter_start(); @@ -1163,12 +1207,14 @@ filter_address_item : T_IPV4_ADDR T_IP if (cidr > 32) { dlog(LOG_WARNING, "%s/%d is not a valid network, " "ignoring", $2, cidr); + free($2); break; } } if (!inet_aton($2, &ip.ipv4)) { dlog(LOG_WARNING, "%s is not a valid IPv4, ignoring", $2); + free($2); break; } @@ -1194,6 +1240,7 @@ filter_address_item : T_IPV4_ADDR T_IP "ignore pool!"); } } + free($2); __kernel_filter_start(); /* host byte order */ @@ -1223,6 +1270,7 @@ filter_address_item : T_IPV6_ADDR T_IP if (cidr > 128) { dlog(LOG_WARNING, "%s/%d is not a valid network, " "ignoring", $2, cidr); + free($2); break; } } @@ -1230,6 +1278,7 @@ filter_address_item : T_IPV6_ADDR T_IP err = inet_pton(AF_INET6, $2, &ip.ipv6); if (err == 0) { dlog(LOG_WARNING, "%s is not a valid IPv6, ignoring", $2); + free($2); break; } else if (err < 0) { dlog(LOG_ERR, "inet_pton(): IPv6 unsupported!"); @@ -1256,6 +1305,7 @@ filter_address_item : T_IPV6_ADDR T_IP "ignore pool!"); } } + free($2); __kernel_filter_start(); /* host byte order */ @@ -1326,6 +1376,7 @@ stat_logfile_bool : T_LOG T_OFF stat_logfile_path : T_LOG T_PATH_VAL { strncpy(conf.stats.logfile, $2, FILENAME_MAXLEN); + free($2); }; stat_syslog_bool : T_SYSLOG T_ON @@ -1361,8 +1412,10 @@ stat_syslog_facility : T_SYSLOG T_STRING else { dlog(LOG_WARNING, "'%s' is not a known syslog facility, " "ignoring.", $2); + free($2); break; } + free($2); if (conf.syslog_facility != -1 && conf.stats.syslog_facility != conf.syslog_facility) @@ -1398,6 +1451,7 @@ helper_type: T_TYPE T_STRING T_STRING T_STRING '{' helper_type_list '}' dlog(LOG_ERR, "unknown layer 3 protocol"); exit(EXIT_FAILURE); } + free($3); if (strcmp($4, "tcp") == 0) l4proto = IPPROTO_TCP; @@ -1407,6 +1461,7 @@ helper_type: T_TYPE T_STRING T_STRING T_STRING '{' helper_type_list '}' dlog(LOG_ERR, "unknown layer 4 protocol"); exit(EXIT_FAILURE); } + free($4); #ifdef BUILD_CTHELPER helper = helper_find(CONNTRACKD_LIB_DIR, $2, l4proto, RTLD_NOW); @@ -1418,6 +1473,7 @@ helper_type: T_TYPE T_STRING T_STRING T_STRING '{' helper_type_list '}' dlog(LOG_ERR, "Helper support is disabled, recompile conntrackd"); exit(EXIT_FAILURE); #endif + free($2); helper_inst = calloc(1, sizeof(struct ctd_helper_instance)); if (helper_inst == NULL) @@ -1526,6 +1582,7 @@ helper_type: T_HELPER_POLICY T_STRING '{' helper_policy_list '}' policy = (struct ctd_helper_policy *) &e->data; strncpy(policy->name, $2, CTD_HELPER_NAME_LEN); + free($2); policy->name[CTD_HELPER_NAME_LEN-1] = '\0'; /* Now object is complete. */ e->type = SYMBOL_HELPER_POLICY_EXPECT_ROOT; -- 2.21.0
