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peer: fix --port option.

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We need SO_REUSEADDR, and we need to memset sockaddr to zero; valgrind
complains for both IPv4 and IPv6, but the invalid sin6_flowinfo causes
the IPv6 bind to fail altogether.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2016-08-18 14:23:20 +09:30
parent d0285416fb
commit 60b4543899
1 changed files with 24 additions and 6 deletions
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30
daemon/peer.c
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@ -1102,16 +1102,32 @@ static int make_listen_fd(struct lightningd_state *dstate,
return -1;
}
if (!addr || bind(fd, addr, len) == 0) {
if (listen(fd, 5) == 0)
return fd;
if (addr) {
int on = 1;
/* Re-use, please.. */
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)))
log_unusual(dstate->base_log,
"Failed setting socket reuse: %s",
strerror(errno));
if (bind(fd, addr, len) != 0) {
log_unusual(dstate->base_log,
"Failed to bind on %u socket: %s",
domain, strerror(errno));
goto fail;
}
}
if (listen(fd, 5) != 0) {
log_unusual(dstate->base_log,
"Failed to listen on %u socket: %s",
domain, strerror(errno));
} else
log_debug(dstate->base_log, "Failed to bind on %u socket: %s",
domain, strerror(errno));
goto fail;
}
return fd;
fail:
close_noerr(fd);
return -1;
}
@ -1124,10 +1140,12 @@ void setup_listeners(struct lightningd_state *dstate, unsigned int portnum)
int fd1, fd2;
u16 listen_port;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_port = htons(portnum);
memset(&addr6, 0, sizeof(addr6));
addr6.sin6_family = AF_INET6;
addr6.sin6_addr = in6addr_any;
addr6.sin6_port = htons(portnum);