mirror of
https://github.com/neocturne/fastd.git
synced 2025-05-14 12:25:07 +02:00
Refactor bind address configuration
This commit is contained in:
parent
921485a5bc
commit
80cbd0c9bd
5 changed files with 172 additions and 188 deletions
43
src/config.c
43
src/config.c
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@ -224,6 +224,22 @@ bool fastd_config_crypto(fastd_context *ctx, fastd_config *conf, const char *alg
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return false;
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}
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void fastd_config_bind_address(fastd_context *ctx, fastd_config *conf, const fastd_peer_address *address, const char *bindtodev, bool default_v4, bool default_v6) {
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fastd_bind_address *addr = malloc(sizeof(fastd_bind_address));
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addr->next = conf->bind_addrs;
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conf->bind_addrs = addr;
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conf->n_bind_addrs++;
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addr->addr = *address;
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addr->bindtodev = bindtodev ? strdup(bindtodev) : NULL;
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if (address->sa.sa_family != AF_INET6 && (default_v4 || !conf->bind_addr_default_v4))
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conf->bind_addr_default_v4 = addr;
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if (address->sa.sa_family != AF_INET && (default_v6 || !conf->bind_addr_default_v6))
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conf->bind_addr_default_v6 = addr;
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}
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bool fastd_config_add_log_file(fastd_context *ctx, fastd_config *conf, const char *name, int level) {
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char *name2 = strdup(name);
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char *name3 = strdup(name);
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@ -418,6 +434,7 @@ bool fastd_read_config(fastd_context *ctx, fastd_config *conf, const char *filen
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}
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static void count_peers(fastd_context *ctx, fastd_config *conf) {
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conf->n_peers = 0;
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conf->n_floating = 0;
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conf->n_v4 = 0;
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conf->n_v6 = 0;
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@ -427,6 +444,8 @@ static void count_peers(fastd_context *ctx, fastd_config *conf) {
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fastd_peer_config *peer;
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for (peer = conf->peers; peer; peer = peer->next) {
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conf->n_peers++;
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switch (peer->address.sa.sa_family) {
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case AF_UNSPEC:
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if (peer->hostname)
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@ -629,35 +648,29 @@ static void option_bind(fastd_context *ctx, fastd_config *conf, const char *arg)
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l = 0;
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}
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fastd_bind_address *addr = calloc(1, sizeof(fastd_bind_address));
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addr->next = conf->bind_addrs;
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conf->bind_addrs = addr;
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fastd_peer_address addr = {};
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if (strcmp(addrstr, "any") == 0) {
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/* nothing to do */
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}
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else if (arg[0] == '[') {
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addr->addr.in6.sin6_family = AF_INET6;
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addr->addr.in6.sin6_port = htons(l);
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addr.in6.sin6_family = AF_INET6;
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addr.in6.sin6_port = htons(l);
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if (inet_pton(AF_INET6, addrstr, &addr->addr.in6.sin6_addr) != 1)
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if (inet_pton(AF_INET6, addrstr, &addr.in6.sin6_addr) != 1)
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exit_error(ctx, "invalid bind address `%s'", addrstr);
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}
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else {
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addr->addr.in.sin_family = AF_INET;
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addr->addr.in.sin_port = htons(l);
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addr.in.sin_family = AF_INET;
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addr.in.sin_port = htons(l);
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if (inet_pton(AF_INET, addrstr, &addr->addr.in.sin_addr) != 1)
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if (inet_pton(AF_INET, addrstr, &addr.in.sin_addr) != 1)
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exit_error(ctx, "invalid bind address `%s'", addrstr);
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}
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if (!conf->bind_addr_default_v4 && addr->addr.sa.sa_family != AF_INET6)
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conf->bind_addr_default_v4 = addr;
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if (!conf->bind_addr_default_v6 && addr->addr.sa.sa_family != AF_INET)
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conf->bind_addr_default_v6 = addr;
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free(addrstr);
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fastd_config_bind_address(ctx, conf, &addr, NULL, false, false);
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}
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static void option_protocol(fastd_context *ctx, fastd_config *conf, const char *arg) {
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@ -104,12 +104,12 @@ default { TOKEN(TOK_DEFAULT); }
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[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3} {
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UPDATE_LOCATION;
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if (!inet_pton(AF_INET, yytext, &yylval->addr)) {
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if (!inet_pton(AF_INET, yytext, &yylval->addr4)) {
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yylval->error = "invalid address";
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return -1;
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}
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return TOK_ADDR;
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return TOK_ADDR4;
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}
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[;:\{\}] { UPDATE_LOCATION; return yytext[0]; }
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77
src/config.y
77
src/config.y
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@ -45,8 +45,9 @@
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fastd_string_stack *str;
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char *error;
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bool boolean;
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struct in_addr addr;
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struct in_addr addr4;
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struct in6_addr addr6;
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fastd_peer_address addr;
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}
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%token START_CONFIG
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@ -99,7 +100,7 @@
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%token TOK_USE
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%token TOK_DEFAULT
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%token <addr> TOK_ADDR
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%token <addr4> TOK_ADDR4
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%token <addr6> TOK_ADDR6
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@ -121,6 +122,10 @@
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%type <str> maybe_as
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%type <num> maybe_af
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%type <boolean> maybe_float
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%type <addr> bind_address
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%type <str> maybe_bind_interface
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%type <num> maybe_bind_default
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%type <num> bind_default
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%%
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start: START_CONFIG config
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@ -188,70 +193,50 @@ log_level: TOK_FATAL { $$ = LOG_CRIT; }
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interface: TOK_STRING { free(conf->ifname); conf->ifname = strdup($1->str); }
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;
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bind_new: {
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fastd_bind_address *addr = calloc(1, sizeof(fastd_bind_address));
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addr->next = conf->bind_addrs;
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conf->bind_addrs = addr;
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bind: bind_address maybe_bind_interface maybe_bind_default {
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fastd_config_bind_address(ctx, conf, &$1, $2 ? $2->str : NULL, $3 == AF_UNSPEC || $3 == AF_INET, $3 == AF_UNSPEC || $3 == AF_INET6);
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}
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;
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bind: bind_new TOK_ADDR maybe_port maybe_bind_to_device maybe_bind_default {
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conf->bind_addrs->addr.in.sin_family = AF_INET;
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conf->bind_addrs->addr.in.sin_addr = $2;
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conf->bind_addrs->addr.in.sin_port = htons($3);
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if (!conf->bind_addr_default_v4)
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conf->bind_addr_default_v4 = conf->bind_addrs;
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bind_address:
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TOK_ADDR4 maybe_port {
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$$ = (fastd_peer_address){ .in = { .sin_family = AF_INET, .sin_addr = $1, .sin_port = htons($2) } };
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}
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| bind_new TOK_ADDR6 maybe_port maybe_bind_to_device maybe_bind_default {
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conf->bind_addrs->addr.in6.sin6_family = AF_INET6;
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conf->bind_addrs->addr.in6.sin6_addr = $2;
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conf->bind_addrs->addr.in6.sin6_port = htons($3);
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if (!conf->bind_addr_default_v6)
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conf->bind_addr_default_v6 = conf->bind_addrs;
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| TOK_ADDR6 maybe_port {
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$$ = (fastd_peer_address){ .in6 = { .sin6_family = AF_INET6, .sin6_addr = $1, .sin6_port = htons($2) } };
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}
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| bind_new TOK_ANY maybe_port maybe_bind_to_device maybe_bind_default {
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conf->bind_addrs->addr.in.sin_port = htons($3);
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if (!conf->bind_addr_default_v4)
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conf->bind_addr_default_v4 = conf->bind_addrs;
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if (!conf->bind_addr_default_v6)
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conf->bind_addr_default_v6 = conf->bind_addrs;
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| TOK_ANY maybe_port {
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$$ = (fastd_peer_address){ .in = { .sin_family = AF_UNSPEC, .sin_port = htons($2) } };
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}
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;
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maybe_bind_to_device:
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maybe_bind_interface:
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TOK_INTERFACE TOK_STRING {
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conf->bind_addrs->bindtodev = strdup($2->str);
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$$ = $2;
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}
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| {
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$$ = NULL;
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}
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;
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maybe_bind_default:
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TOK_DEFAULT bind_default
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TOK_DEFAULT bind_default {
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$$ = $2;
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}
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| {
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$$ = -1;
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}
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;
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bind_default:
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TOK_IPV4 {
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if (conf->bind_addrs->addr.sa.sa_family == AF_INET6) {
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fastd_config_error(&@$, ctx, conf, filename, depth, "tried to set IPv6 bind as IPv4 default");
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YYERROR;
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}
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conf->bind_addr_default_v4 = conf->bind_addrs;
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$$ = AF_INET;
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}
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| TOK_IPV6 {
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if (conf->bind_addrs->addr.sa.sa_family == AF_INET) {
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fastd_config_error(&@$, ctx, conf, filename, depth, "tried to set IPv4 bind as IPv6 default");
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YYERROR;
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}
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conf->bind_addr_default_v6 = conf->bind_addrs;
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$$ = AF_INET6;
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}
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| {
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if (conf->bind_addrs->addr.sa.sa_family != AF_INET6)
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conf->bind_addr_default_v4 = conf->bind_addrs;
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if (conf->bind_addrs->addr.sa.sa_family != AF_INET)
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conf->bind_addr_default_v6 = conf->bind_addrs;
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$$ = AF_UNSPEC;
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}
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;
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@ -340,7 +325,7 @@ peer_statement: TOK_REMOTE peer_remote ';'
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| TOK_INCLUDE peer_include ';'
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;
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peer_remote: TOK_ADDR port {
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peer_remote: TOK_ADDR4 port {
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free(conf->peers->hostname);
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conf->peers->hostname = NULL;
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233
src/fastd.c
233
src/fastd.c
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@ -147,140 +147,114 @@ static void crypto_free(fastd_context *ctx) {
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}
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static unsigned max_sockets(const fastd_config *conf) {
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unsigned n = 0;
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fastd_bind_address *addr;
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for (addr = conf->bind_addrs; addr; addr = addr->next)
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n++;
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return n;
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}
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static void init_sockets(fastd_context *ctx) {
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static const fastd_bind_address bind_any = {};
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ctx->socks = malloc(ctx->conf->n_bind_addrs * sizeof(fastd_socket));
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const fastd_bind_address *addr = ctx->conf->bind_addrs;
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const fastd_bind_address *default_v4 = ctx->conf->bind_addr_default_v4;
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const fastd_bind_address *default_v6 = ctx->conf->bind_addr_default_v6;
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unsigned i;
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fastd_bind_address *addr = ctx->conf->bind_addrs;
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for (i = 0; i < ctx->conf->n_bind_addrs; i++) {
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ctx->socks[i] = (fastd_socket){-2, addr};
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if (!addr)
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addr = default_v4 = default_v6 = &bind_any;
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if (addr == ctx->conf->bind_addr_default_v4)
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ctx->sock_default_v4 = &ctx->socks[i];
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unsigned n_v4 = 0, n_v6 = 0;
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bool info_ipv6 = true;
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ctx->socks = calloc(max_sockets(ctx->conf), sizeof(fastd_socket));
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while (addr) {
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int fd = -1;
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int af = AF_UNSPEC;
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if (addr->addr.sa.sa_family != AF_INET) {
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fd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
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if (fd < 0) {
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if (info_ipv6) {
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pr_warn(ctx, "there seems to be no IPv6 support; explicitely bind to an IPv4 address (or 0.0.0.0) to disable this warning");
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info_ipv6 = false;
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}
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}
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else {
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af = AF_INET6;
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int val = (addr->addr.sa.sa_family == AF_INET6);
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if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val))) {
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pr_warn_errno(ctx, "setsockopt");
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goto error;
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}
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}
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}
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if (fd < 0 && addr->addr.sa.sa_family != AF_INET6) {
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fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (fd < 0)
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exit_errno(ctx, "unable to create socket");
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else
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af = AF_INET;
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}
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if (fd < 0)
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goto error;
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if (addr->bindtodev) {
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if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, addr->bindtodev, strlen(addr->bindtodev))) {
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pr_warn_errno(ctx, "setsockopt: unable to bind to device");
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goto error;
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}
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}
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fastd_peer_address bind_address = addr->addr;
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if (bind_address.sa.sa_family == AF_UNSPEC) {
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memset(&bind_address, 0, sizeof(bind_address));
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bind_address.sa.sa_family = af;
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if (af == AF_INET6)
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bind_address.in6.sin6_port = addr->addr.in.sin_port;
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else
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bind_address.in.sin_port = addr->addr.in.sin_port;
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}
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if (bind(fd, (struct sockaddr*)&bind_address, af == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in))) {
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pr_warn(ctx, "bind");
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goto error;
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}
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ctx->socks[ctx->n_socks] = (fastd_socket){fd, addr};
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if (af == AF_INET6) {
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if (addr == default_v6)
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ctx->sock_default_v6 = &ctx->socks[ctx->n_socks];
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n_v6++;
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if (addr->addr.sa.sa_family == AF_UNSPEC) {
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if (addr == default_v4)
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ctx->sock_default_v4 = &ctx->socks[ctx->n_socks];
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n_v4++;
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}
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}
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else {
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if (addr == default_v4)
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ctx->sock_default_v4 = &ctx->socks[ctx->n_socks];
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n_v4++;
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}
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ctx->n_socks++;
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addr = addr->next;
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continue;
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error:
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if (fd >= 0) {
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if (close(fd))
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pr_error_errno(ctx, "close");
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}
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if (addr->bindtodev)
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pr_warn(ctx, "unable to bind to %I on `%s'", &addr->addr, addr->bindtodev);
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else
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pr_warn(ctx, "unable to bind to %I", &addr->addr);
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if (addr == default_v4 || addr == default_v6)
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exit_error(ctx, "unable to bind to default address");
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if (addr == ctx->conf->bind_addr_default_v6)
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ctx->sock_default_v6 = &ctx->socks[i];
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addr = addr->next;
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}
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if (!ctx->n_socks)
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exit_error(ctx, "all bind attempts failed");
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ctx->n_socks = ctx->conf->n_bind_addrs;
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}
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if (!n_v4 && ctx->conf->n_v4)
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pr_warn(ctx, "there are IPv4 peers defined, but there was no successful IPv4 bind");
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static int bind_socket(fastd_context *ctx, const fastd_bind_address *addr, bool warn) {
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int fd = -1;
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int af = AF_UNSPEC;
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if (!n_v6 && ctx->conf->n_v6)
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pr_warn(ctx, "there are IPv6 peers defined, but there was no successful IPv4 bind");
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if (addr->addr.sa.sa_family != AF_INET) {
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fd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
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if (fd >= 0) {
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af = AF_INET6;
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int val = (addr->addr.sa.sa_family == AF_INET6);
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if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val))) {
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if (warn)
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pr_warn_errno(ctx, "setsockopt");
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goto error;
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}
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}
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}
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if (fd < 0 && addr->addr.sa.sa_family != AF_INET6) {
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fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (fd < 0)
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exit_errno(ctx, "unable to create socket");
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else
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af = AF_INET;
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}
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if (fd < 0)
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goto error;
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if (addr->bindtodev) {
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if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, addr->bindtodev, strlen(addr->bindtodev))) {
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if (warn)
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pr_warn_errno(ctx, "setsockopt: unable to bind to device");
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goto error;
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}
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}
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fastd_peer_address bind_address = addr->addr;
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if (bind_address.sa.sa_family == AF_UNSPEC) {
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memset(&bind_address, 0, sizeof(bind_address));
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bind_address.sa.sa_family = af;
|
||||
|
||||
if (af == AF_INET6)
|
||||
bind_address.in6.sin6_port = addr->addr.in.sin_port;
|
||||
else
|
||||
bind_address.in.sin_port = addr->addr.in.sin_port;
|
||||
}
|
||||
|
||||
if (bind(fd, (struct sockaddr*)&bind_address, af == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in))) {
|
||||
if (warn)
|
||||
pr_warn(ctx, "bind");
|
||||
goto error;
|
||||
}
|
||||
|
||||
return fd;
|
||||
|
||||
error:
|
||||
if (fd >= 0) {
|
||||
if (close(fd))
|
||||
pr_error_errno(ctx, "close");
|
||||
}
|
||||
|
||||
if (warn) {
|
||||
if (addr->bindtodev)
|
||||
pr_warn(ctx, "unable to bind to %I on `%s'", &addr->addr, addr->bindtodev);
|
||||
else
|
||||
pr_warn(ctx, "unable to bind to %I", &addr->addr);
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
static void bind_sockets(fastd_context *ctx) {
|
||||
unsigned i;
|
||||
|
||||
for (i = 0; i < ctx->n_socks; i++) {
|
||||
if (ctx->socks[i].fd >= 0)
|
||||
continue;
|
||||
|
||||
ctx->socks[i].fd = bind_socket(ctx, ctx->socks[i].addr, ctx->socks[i].fd < -1);
|
||||
|
||||
if (ctx->socks[i].fd >= 0) {
|
||||
if (ctx->socks[i].addr->bindtodev)
|
||||
pr_info(ctx, "successfully bound to %I on `%s'", &ctx->socks[i].addr->addr, ctx->socks[i].addr->bindtodev);
|
||||
else
|
||||
pr_info(ctx, "successfully bound to %I", &ctx->socks[i].addr->addr);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void init_tuntap(fastd_context *ctx) {
|
||||
|
|
@ -315,12 +289,17 @@ static void init_tuntap(fastd_context *ctx) {
|
|||
|
||||
ctx->ifname = strndup(ifr.ifr_name, IFNAMSIZ);
|
||||
|
||||
int ctl_sock = ctx->socks[0].fd;
|
||||
int ctl_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
||||
if (ctl_sock < 0)
|
||||
exit_errno(ctx, "socket");
|
||||
|
||||
ifr.ifr_mtu = ctx->conf->mtu;
|
||||
if (ioctl(ctl_sock, SIOCSIFMTU, &ifr) < 0)
|
||||
exit_errno(ctx, "SIOCSIFMTU ioctl failed");
|
||||
|
||||
if (close(ctl_sock))
|
||||
pr_error_errno(ctx, "close");
|
||||
|
||||
pr_debug(ctx, "tun/tap device initialized.");
|
||||
}
|
||||
|
||||
|
|
@ -924,6 +903,8 @@ int main(int argc, char *argv[]) {
|
|||
pr_info(&ctx, "fastd " FASTD_VERSION " starting");
|
||||
|
||||
init_sockets(&ctx);
|
||||
bind_sockets(&ctx);
|
||||
|
||||
init_tuntap(&ctx);
|
||||
|
||||
init_peers(&ctx);
|
||||
|
|
@ -949,6 +930,8 @@ int main(int argc, char *argv[]) {
|
|||
|
||||
while (!terminate) {
|
||||
handle_tasks(&ctx);
|
||||
|
||||
bind_sockets(&ctx);
|
||||
handle_input(&ctx);
|
||||
|
||||
maintenance(&ctx);
|
||||
|
|
|
|||
|
|
@ -160,6 +160,7 @@ struct _fastd_config {
|
|||
|
||||
char *ifname;
|
||||
|
||||
unsigned n_bind_addrs;
|
||||
fastd_bind_address *bind_addrs;
|
||||
|
||||
fastd_bind_address *bind_addr_default_v4;
|
||||
|
|
@ -187,6 +188,7 @@ struct _fastd_config {
|
|||
fastd_string_stack *peer_dirs;
|
||||
fastd_peer_config *peers;
|
||||
|
||||
unsigned n_peers;
|
||||
unsigned n_floating;
|
||||
unsigned n_v4;
|
||||
unsigned n_v6;
|
||||
|
|
@ -277,6 +279,7 @@ bool fastd_config_protocol(fastd_context *ctx, fastd_config *conf, const char *n
|
|||
bool fastd_config_method(fastd_context *ctx, fastd_config *conf, const char *name);
|
||||
bool fastd_config_crypto(fastd_context *ctx, fastd_config *conf, const char *alg, const char *impl);
|
||||
bool fastd_config_add_log_file(fastd_context *ctx, fastd_config *conf, const char *name, int level);
|
||||
void fastd_config_bind_address(fastd_context *ctx, fastd_config *conf, const fastd_peer_address *address, const char *bindtodev, bool default_v4, bool default_v6);
|
||||
void fastd_configure(fastd_context *ctx, fastd_config *conf, int argc, char *const argv[]);
|
||||
void fastd_reconfigure(fastd_context *ctx, fastd_config *conf);
|
||||
void fastd_config_release(fastd_context *ctx, fastd_config *conf);
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue