X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=apps%2Fs_socket.c;h=4b82011acd1de8b48ec22994ca4a85749b927df6;hp=d16f5ad81731cc62e4bf3f9f935de9701da3486e;hb=ebc0168384e9bbc29c02b85adb01036609769761;hpb=846e33c729311169d9c988ceba29484b3783f244 diff --git a/apps/s_socket.c b/apps/s_socket.c index d16f5ad817..4b82011acd 100644 --- a/apps/s_socket.c +++ b/apps/s_socket.c @@ -1,5 +1,5 @@ /* - * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy @@ -28,22 +28,27 @@ typedef unsigned int u_int; #ifndef OPENSSL_NO_SOCK -# define USE_SOCKETS # include "apps.h" -# undef USE_SOCKETS # include "s_apps.h" +# include "internal/sockets.h" # include # include +/* Keep track of our peer's address for the cookie callback */ +BIO_ADDR *ourpeer = NULL; + /* * init_client - helper routine to set up socket communication * @sock: pointer to storage of resulting socket. * @host: the host name or path (for AF_UNIX) to connect to. * @port: the port to connect to (ignored for AF_UNIX). + * @bindhost: source host or path (for AF_UNIX). + * @bindport: source port (ignored for AF_UNIX). * @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or * AF_UNSPEC * @type: socket type, must be SOCK_STREAM or SOCK_DGRAM + * @protocol: socket protocol, e.g. IPPROTO_TCP or IPPROTO_UDP (or 0 for any) * * This will create a socket and use it to connect to a host:port, or if * family == AF_UNIX, to the path found in host. @@ -55,37 +60,92 @@ typedef unsigned int u_int; * Returns 1 on success, 0 on failure. */ int init_client(int *sock, const char *host, const char *port, - int family, int type) + const char *bindhost, const char *bindport, + int family, int type, int protocol) { BIO_ADDRINFO *res = NULL; + BIO_ADDRINFO *bindaddr = NULL; const BIO_ADDRINFO *ai = NULL; + const BIO_ADDRINFO *bi = NULL; + int found = 0; int ret; - if (!BIO_sock_init()) + if (BIO_sock_init() != 1) return 0; - ret = BIO_lookup(host, port, BIO_LOOKUP_CLIENT, family, type, &res); + ret = BIO_lookup_ex(host, port, BIO_LOOKUP_CLIENT, family, type, protocol, + &res); if (ret == 0) { ERR_print_errors(bio_err); return 0; } + if (bindhost != NULL || bindport != NULL) { + ret = BIO_lookup_ex(bindhost, bindport, BIO_LOOKUP_CLIENT, + family, type, protocol, &bindaddr); + if (ret == 0) { + ERR_print_errors (bio_err); + goto out; + } + } + ret = 0; for (ai = res; ai != NULL; ai = BIO_ADDRINFO_next(ai)) { /* Admittedly, these checks are quite paranoid, we should not get * anything in the BIO_ADDRINFO chain that we haven't * asked for. */ - OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res)) - && (type == 0 || type == BIO_ADDRINFO_socktype(res))); + OPENSSL_assert((family == AF_UNSPEC + || family == BIO_ADDRINFO_family(ai)) + && (type == 0 || type == BIO_ADDRINFO_socktype(ai)) + && (protocol == 0 + || protocol == BIO_ADDRINFO_protocol(ai))); + + if (bindaddr != NULL) { + for (bi = bindaddr; bi != NULL; bi = BIO_ADDRINFO_next(bi)) { + if (BIO_ADDRINFO_family(bi) == BIO_ADDRINFO_family(ai)) + break; + } + if (bi == NULL) + continue; + ++found; + } *sock = BIO_socket(BIO_ADDRINFO_family(ai), BIO_ADDRINFO_socktype(ai), - BIO_ADDRINFO_protocol(res), 0); + BIO_ADDRINFO_protocol(ai), 0); if (*sock == INVALID_SOCKET) { /* Maybe the kernel doesn't support the socket family, even if * BIO_lookup() added it in the returned result... */ continue; } + + if (bi != NULL) { + if (!BIO_bind(*sock, BIO_ADDRINFO_address(bi), + BIO_SOCK_REUSEADDR)) { + BIO_closesocket(*sock); + *sock = INVALID_SOCKET; + break; + } + } + +#ifndef OPENSSL_NO_SCTP + if (protocol == IPPROTO_SCTP) { + /* + * For SCTP we have to set various options on the socket prior to + * connecting. This is done automatically by BIO_new_dgram_sctp(). + * We don't actually need the created BIO though so we free it again + * immediately. + */ + BIO *tmpbio = BIO_new_dgram_sctp(*sock, BIO_NOCLOSE); + + if (tmpbio == NULL) { + ERR_print_errors(bio_err); + return 0; + } + BIO_free(tmpbio); + } +#endif + if (!BIO_connect(*sock, BIO_ADDRINFO_address(ai), 0)) { BIO_closesocket(*sock); *sock = INVALID_SOCKET; @@ -97,12 +157,27 @@ int init_client(int *sock, const char *host, const char *port, } if (*sock == INVALID_SOCKET) { + if (bindaddr != NULL && !found) { + BIO_printf(bio_err, "Can't bind %saddress for %s%s%s\n", + BIO_ADDRINFO_family(res) == AF_INET6 ? "IPv6 " : + BIO_ADDRINFO_family(res) == AF_INET ? "IPv4 " : + BIO_ADDRINFO_family(res) == AF_UNIX ? "unix " : "", + bindhost != NULL ? bindhost : "", + bindport != NULL ? ":" : "", + bindport != NULL ? bindport : ""); + ERR_clear_error(); + ret = 0; + } ERR_print_errors(bio_err); } else { /* Remove any stale errors from previous connection attempts */ ERR_clear_error(); ret = 1; } +out: + if (bindaddr != NULL) { + BIO_ADDRINFO_free (bindaddr); + } BIO_ADDRINFO_free(res); return ret; } @@ -128,19 +203,24 @@ int init_client(int *sock, const char *host, const char *port, * 0 on failure, something other on success. */ int do_server(int *accept_sock, const char *host, const char *port, - int family, int type, do_server_cb cb, + int family, int type, int protocol, do_server_cb cb, unsigned char *context, int naccept) { int asock = 0; int sock; int i; BIO_ADDRINFO *res = NULL; + const BIO_ADDRINFO *next; + int sock_family, sock_type, sock_protocol; + const BIO_ADDR *sock_address; + int sock_options = BIO_SOCK_REUSEADDR; int ret = 0; - if (!BIO_sock_init()) + if (BIO_sock_init() != 1) return 0; - if (!BIO_lookup(host, port, BIO_LOOKUP_SERVER, family, type, &res)) { + if (!BIO_lookup_ex(host, port, BIO_LOOKUP_SERVER, family, type, protocol, + &res)) { ERR_print_errors(bio_err); return 0; } @@ -148,12 +228,32 @@ int do_server(int *accept_sock, const char *host, const char *port, /* Admittedly, these checks are quite paranoid, we should not get * anything in the BIO_ADDRINFO chain that we haven't asked for */ OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res)) - && (type == 0 || type == BIO_ADDRINFO_socktype(res))); + && (type == 0 || type == BIO_ADDRINFO_socktype(res)) + && (protocol == 0 || protocol == BIO_ADDRINFO_protocol(res))); + + sock_family = BIO_ADDRINFO_family(res); + sock_type = BIO_ADDRINFO_socktype(res); + sock_protocol = BIO_ADDRINFO_protocol(res); + sock_address = BIO_ADDRINFO_address(res); + next = BIO_ADDRINFO_next(res); + if (sock_family == AF_INET6) + sock_options |= BIO_SOCK_V6_ONLY; + if (next != NULL + && BIO_ADDRINFO_socktype(next) == sock_type + && BIO_ADDRINFO_protocol(next) == sock_protocol) { + if (sock_family == AF_INET + && BIO_ADDRINFO_family(next) == AF_INET6) { + sock_family = AF_INET6; + sock_address = BIO_ADDRINFO_address(next); + } else if (sock_family == AF_INET6 + && BIO_ADDRINFO_family(next) == AF_INET) { + sock_options &= ~BIO_SOCK_V6_ONLY; + } + } - asock = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res), - BIO_ADDRINFO_protocol(res), 0); + asock = BIO_socket(sock_family, sock_type, sock_protocol, 0); if (asock == INVALID_SOCKET - || !BIO_listen(asock, BIO_ADDRINFO_address(res), BIO_SOCK_REUSEADDR)) { + || !BIO_listen(asock, sock_address, sock_options)) { BIO_ADDRINFO_free(res); ERR_print_errors(bio_err); if (asock != INVALID_SOCKET) @@ -161,6 +261,25 @@ int do_server(int *accept_sock, const char *host, const char *port, goto end; } +#ifndef OPENSSL_NO_SCTP + if (protocol == IPPROTO_SCTP) { + /* + * For SCTP we have to set various options on the socket prior to + * accepting. This is done automatically by BIO_new_dgram_sctp(). + * We don't actually need the created BIO though so we free it again + * immediately. + */ + BIO *tmpbio = BIO_new_dgram_sctp(asock, BIO_NOCLOSE); + + if (tmpbio == NULL) { + BIO_closesocket(asock); + ERR_print_errors(bio_err); + goto end; + } + BIO_free(tmpbio); + } +#endif + BIO_ADDRINFO_free(res); res = NULL; @@ -168,18 +287,50 @@ int do_server(int *accept_sock, const char *host, const char *port, *accept_sock = asock; for (;;) { if (type == SOCK_STREAM) { + BIO_ADDR_free(ourpeer); + ourpeer = BIO_ADDR_new(); + if (ourpeer == NULL) { + BIO_closesocket(asock); + ERR_print_errors(bio_err); + goto end; + } do { - sock = BIO_accept_ex(asock, NULL, 0); - } while (sock < 0 && BIO_sock_should_retry(ret)); + sock = BIO_accept_ex(asock, ourpeer, 0); + } while (sock < 0 && BIO_sock_should_retry(sock)); if (sock < 0) { ERR_print_errors(bio_err); BIO_closesocket(asock); break; } - i = (*cb)(sock, type, context); + i = (*cb)(sock, type, protocol, context); + + /* + * Give the socket time to send its last data before we close it. + * No amount of setting SO_LINGER etc on the socket seems to + * persuade Windows to send the data before closing the socket... + * but sleeping for a short time seems to do it (units in ms) + * TODO: Find a better way to do this + */ +#if defined(OPENSSL_SYS_WINDOWS) + Sleep(50); +#elif defined(OPENSSL_SYS_CYGWIN) + usleep(50000); +#endif + + /* + * If we ended with an alert being sent, but still with data in the + * network buffer to be read, then calling BIO_closesocket() will + * result in a TCP-RST being sent. On some platforms (notably + * Windows) then this will result in the peer immediately abandoning + * the connection including any buffered alert data before it has + * had a chance to be read. Shutting down the sending side first, + * and then closing the socket sends TCP-FIN first followed by + * TCP-RST. This seems to allow the peer to read the alert data. + */ + shutdown(sock, 1); /* SHUT_WR */ BIO_closesocket(sock); } else { - i = (*cb)(asock, type, context); + i = (*cb)(asock, type, protocol, context); } if (naccept != -1) @@ -195,6 +346,8 @@ int do_server(int *accept_sock, const char *host, const char *port, if (family == AF_UNIX) unlink(host); # endif + BIO_ADDR_free(ourpeer); + ourpeer = NULL; return ret; }