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Merge branch 'tor-gitlab/mr/579'
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commit
c733ccda99
5
changes/ip_bind_address_no_port
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5
changes/ip_bind_address_no_port
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@ -0,0 +1,5 @@
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o Minor features (relays):
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- Set the Linux-specific IP_BIND_ADDRESS_NO_PORT option on outgoing
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sockets, allowing relays using OutboundBindAddress to make more outgoing
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connections than ephemeral ports, as long as they are to separate
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destinations. Related to issue 40597; patch by Alex Xu (Hello71).
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@ -2234,6 +2234,23 @@ connection_connect_sockaddr,(connection_t *conn,
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tor_socket_strerror(errno));
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}
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#ifdef IP_BIND_ADDRESS_NO_PORT
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static int try_ip_bind_address_no_port = 1;
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if (bindaddr && try_ip_bind_address_no_port &&
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setsockopt(s, SOL_IP, IP_BIND_ADDRESS_NO_PORT, &(int){1}, sizeof(int))) {
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if (errno == EINVAL) {
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log_notice(LD_NET, "Tor was built with support for "
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"IP_BIND_ADDRESS_NO_PORT, but the current kernel "
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"doesn't support it. This might cause Tor to run out "
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"of ephemeral ports more quickly.");
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try_ip_bind_address_no_port = 0;
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} else {
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log_warn(LD_NET, "Error setting IP_BIND_ADDRESS_NO_PORT on new "
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"connection: %s", tor_socket_strerror(errno));
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}
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}
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#endif
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if (bindaddr && bind(s, bindaddr, bindaddr_len) < 0) {
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*socket_error = tor_socket_errno(s);
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if (ERRNO_IS_EADDRINUSE(*socket_error)) {
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@ -1033,6 +1033,14 @@ sb_setsockopt(scmp_filter_ctx ctx, sandbox_cfg_t *filter)
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return rc;
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#endif /* defined(IPV6_V6ONLY) */
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#ifdef IP_BIND_ADDRESS_NO_PORT
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rc = seccomp_rule_add_2(ctx, SCMP_ACT_ALLOW, SCMP_SYS(setsockopt),
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SCMP_CMP(1, SCMP_CMP_EQ, SOL_IP),
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SCMP_CMP(2, SCMP_CMP_EQ, IP_BIND_ADDRESS_NO_PORT));
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if (rc)
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return rc;
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#endif
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return 0;
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}
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