/* * Test for the regression introduced by * * b9470c27607b ("inet: kill smallest_size and smallest_port") * * If we open an ipv4 socket on a port with reuseaddr we shouldn't reset the tb * when we open the ipv6 conterpart, which is what was happening previously. */ #include #include #include #include #include #include #include #include #include #define PORT 9999 int open_port(int ipv6, int any) { int fd = -1; int reuseaddr = 1; int v6only = 1; int addrlen; int ret = -1; struct sockaddr *addr; int family = ipv6 ? AF_INET6 : AF_INET; struct sockaddr_in6 addr6 = { .sin6_family = AF_INET6, .sin6_port = htons(PORT), .sin6_addr = in6addr_any }; struct sockaddr_in addr4 = { .sin_family = AF_INET, .sin_port = htons(PORT), .sin_addr.s_addr = any ? htonl(INADDR_ANY) : inet_addr("127.0.0.1"), }; if (ipv6) { addr = (struct sockaddr*)&addr6; addrlen = sizeof(addr6); } else { addr = (struct sockaddr*)&addr4; addrlen = sizeof(addr4); } if ((fd = socket(family, SOCK_STREAM, IPPROTO_TCP)) < 0) { perror("socket"); goto out; } if (ipv6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&v6only, sizeof(v6only)) < 0) { perror("setsockopt IPV6_V6ONLY"); goto out; } if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, sizeof(reuseaddr)) < 0) { perror("setsockopt SO_REUSEADDR"); goto out; } if (bind(fd, addr, addrlen) < 0) { perror("bind"); goto out; } if (any) return fd; if (listen(fd, 1) < 0) { perror("listen"); goto out; } return fd; out: close(fd); return ret; } int main(void) { int listenfd; int fd1, fd2; fprintf(stderr, "Opening 127.0.0.1:%d\n", PORT); listenfd = open_port(0, 0); if (listenfd < 0) error(1, errno, "Couldn't open listen socket"); fprintf(stderr, "Opening INADDR_ANY:%d\n", PORT); fd1 = open_port(0, 1); if (fd1 >= 0) error(1, 0, "Was allowed to create an ipv4 reuseport on a already bound non-reuseport socket"); fprintf(stderr, "Opening in6addr_any:%d\n", PORT); fd1 = open_port(1, 1); if (fd1 < 0) error(1, errno, "Couldn't open ipv6 reuseport"); fprintf(stderr, "Opening INADDR_ANY:%d\n", PORT); fd2 = open_port(0, 1); if (fd2 >= 0) error(1, 0, "Was allowed to create an ipv4 reuseport on a already bound non-reuseport socket"); close(fd1); fprintf(stderr, "Opening INADDR_ANY:%d after closing ipv6 socket\n", PORT); fd1 = open_port(0, 1); if (fd1 >= 0) error(1, 0, "Was allowed to create an ipv4 reuseport on an already bound non-reuseport socket with no ipv6"); fprintf(stderr, "Success\n"); return 0; }