/* * net.c -- handles: * all raw network i/o * */ #include #include "common.h" #include "net.h" #include "socket.h" #include "misc.h" #include "main.h" #include "debug.h" #include "dccutil.h" #include "crypt.h" #include "egg_timer.h" #include "traffic.h" #include "adns.h" #include #include #include #include #include #include #include #if HAVE_SYS_SELECT_H # include #endif /* HAVE_SYS_SELECT_H */ #include #include #include #include #if HAVE_UNISTD_H # include #endif /* HAVE_UNITSTD_H */ extern egg_traffic_t traffic; #ifdef HAVE_SSL SSL_CTX *ssl_c_ctx = NULL, *ssl_s_ctx = NULL; char *tls_rand_file = NULL; #endif /* HAVE_SSL */ union sockaddr_union cached_myip4_so; #ifdef USE_IPV6 union sockaddr_union cached_myip6_so; #endif /* USE_IPV6 */ char natip[121] = ""; bool identd_hack = 0; /* identd_open() won't work on most servers, dont even bother warning. */ char firewall[121] = ""; /* Socks server for firewall */ port_t firewallport = 1080; /* Default port of Sock4/5 firewalls */ char botuser[21] = ""; /* Username of the user running the bot */ int resolve_timeout = 10; /* hostname/address lookup timeout */ int socks_total = 0; /* total number of sockets */ sock_list *socklist = NULL; /* Enough to be safe */ int MAXSOCKS = 0; jmp_buf alarmret; /* Env buffer for alarm() returns */ /* Types of proxy */ #define PROXY_SOCKS 1 #define PROXY_SUN 2 #define PROXY_HTTP 3 /* I need an UNSIGNED long for dcc type stuff */ unsigned long my_atoul(char *s) { unsigned long ret = 0; while ((*s >= '0') && (*s <= '9')) { ret *= 10; ret += ((*s) - '0'); s++; } return ret; } int hostprotocol(char *host) { if (!host || (host && !host[0])) return 0; /* return the AF_TYPE if it's already an ip */ int af_type = is_dotted_ip(host); if (af_type) return af_type; #ifdef USE_IPV6 struct hostent *he = NULL; sdprintf("WARNING: gethostbyname2() is about to block in hostprotocol()"); if (!setjmp(alarmret)) { alarm(resolve_timeout); # ifdef HAVE_GETHOSTBYNAME2 he = gethostbyname2(host, AF_INET6); # else int error_num; he = getipnodebyname(host, AF_INET6, AI_DEFAULT, &error_num); # endif /* HAVE_GETHOSTBYNAME2 */ alarm(0); } else he = NULL; if (!he) return AF_INET; return AF_INET6; #else return 0; #endif /* USE_IPV6 */ } /* get the protocol used on a socket */ int sockprotocol(int sock) { struct sockaddr sa; socklen_t socklen = sizeof(sa); egg_bzero(&sa, socklen); if (getsockname(sock, &sa, &socklen)) return -1; else return sa.sa_family; } /* AF_INET-independent resolving routine */ static int get_ip(char *hostname, union sockaddr_union *so) { if (!hostname || (hostname && !hostname[0])) return 1; egg_memset(so, 0, sizeof(union sockaddr_union)); debug1("get_ip(%s)", hostname); #ifdef USE_IPV6 struct addrinfo hints, *ai = NULL, *res = NULL; int error = 0; egg_memset(&hints, 0, sizeof(struct addrinfo)); hints.ai_socktype = SOCK_STREAM; if ((error = getaddrinfo(hostname, NULL, &hints, &res))) { if (res) freeaddrinfo(res); return error; } error = 1; for (ai = res; ai != NULL; ai = ai->ai_next) { if ((ai->ai_family == AF_INET6) || (ai->ai_family == AF_INET)) { memcpy(so, ai->ai_addr, ai->ai_addrlen); error = 0; break; } } if (res) freeaddrinfo(res); return error; #else struct hostent *hp = NULL; if (!(hp = gethostbyname(hostname))) return -1; memcpy(&so->sin.sin_addr, hp->h_addr, 4); so->sin.sin_family = AF_INET; return 0; #endif /* USE_IPV6 */ } #ifdef HAVE_SSL int seed_PRNG(void) { char stackdata[1024] = ""; static char rand_file[300] = ""; FILE *fh = NULL; #if OPENSSL_VERSION_NUMBER >= 0x00905100 if (RAND_status()) return 0; #endif /* OPENSSL_VERSION_NUMBER */ if ((fh = fopen("/dev/urandom", "r"))) { fclose(fh); return 0; } if (RAND_file_name(rand_file, sizeof(rand_file))) tls_rand_file = rand_file; else return 1; if (!RAND_load_file(rand_file, 1024)) { unsigned int c; c = now; RAND_seed(&c, sizeof(c)); c = getpid(); RAND_seed(&c, sizeof(c)); RAND_seed(stackdata, sizeof(stackdata)); } #if OPENSSL_VERSION_NUMBER >= 0x00905100 if (!RAND_status()) return 2; #endif /* OPENSSL_VERSION_NUMBER >= 0x00905100 */ return 0; } #endif /* HAVE_SSL */ /* Initialize the socklist */ void init_net() { for (int i = 0; i < MAXSOCKS; i++) { egg_bzero(&socklist[i], sizeof(socklist[i])); #ifdef HAVE_SSL socklist[i].ssl=NULL; #endif /* HAVE_SSL */ socklist[i].flags = SOCK_UNUSED; } #ifdef HAVE_SSL SSL_load_error_strings(); OpenSSL_add_ssl_algorithms(); ssl_c_ctx = SSL_CTX_new(SSLv23_client_method()); ssl_s_ctx = SSL_CTX_new(SSLv23_server_method()); if (!ssl_c_ctx || !ssl_s_ctx) fatal("SSL Inititlization failed", 0); if (seed_PRNG()) fatal("SSL PRNG seeding failed!", 0); #endif /* HAVE_SSL */ } #ifdef HAVE_SSL int ssl_cleanup() { if (ssl_c_ctx) { SSL_CTX_free(ssl_c_ctx); ssl_c_ctx = NULL; } if (ssl_s_ctx) { SSL_CTX_free(ssl_s_ctx); ssl_s_ctx = NULL; } if (tls_rand_file) RAND_write_file(tls_rand_file); return 0; } #endif /* HAVE_SSL */ /* Get my ipv? ip */ char *myipstr(int af_type) { #ifdef USE_IPV6 if (af_type == 6) { static char s[UHOSTLEN + 1] = ""; egg_inet_ntop(AF_INET6, &cached_myip6_so.sin6.sin6_addr, s, 119); s[120] = 0; return s; } else #endif /* USE_IPV6 */ if (af_type == 4) { static char s[UHOSTLEN + 1] = ""; egg_inet_ntop(AF_INET, &cached_myip4_so.sin.sin_addr, s, 119); s[120] = 0; return s; } return ""; } /* Get my ip number */ in_addr_t getmyip() { return natip[0] ? inet_addr(natip) : cached_myip4_so.sin.sin_addr.s_addr; } /* see if it's necessary to set inaddr_any... because if we can't resolve, we die anyway */ void cache_my_ip() { int error = 0; debug0("cache_my_ip()"); egg_memset(&cached_myip4_so, 0, sizeof(union sockaddr_union)); #ifdef USE_IPV6 bool any = 0; egg_memset(&cached_myip6_so, 0, sizeof(union sockaddr_union)); if (conf.bot->ip6) { if (get_ip(conf.bot->ip6, &cached_myip6_so)) any = 1; } else if (conf.bot->host6) { if (get_ip(conf.bot->host6, &cached_myip6_so)) any = 1; } else any = 1; if (any) { cached_myip6_so.sin6.sin6_family = AF_INET6; cached_myip6_so.sin6.sin6_addr = in6addr_any; } #endif /* USE_IPV6 */ if (conf.bot->ip) { if (get_ip(conf.bot->ip, &cached_myip4_so)) error = 1; } else if (conf.bot->host) { if (get_ip(conf.bot->host, &cached_myip4_so)) error = 2; } else { /* char s[121] = ""; gethostname(s, sizeof(s)); if (get_ip(s, &cached_myip4_so)) { */ /* error = 3; */ cached_myip4_so.sin.sin_family = AF_INET; cached_myip4_so.sin.sin_addr.s_addr = INADDR_ANY; // } } if (error) { putlog(LOG_DEBUG, "*", "Hostname self-lookup error: %d", error); fatal("Hostname self-lookup failed.", 0); } } /* Sets/Unsets options for a specific socket. * * Returns: 0 - on success * -1 - socket not found * -2 - illegal operation */ int sockoptions(int sock, int operation, int sock_options) { for (int i = 0; i < MAXSOCKS; i++) { if ((socklist[i].sock == sock) && !(socklist[i].flags & SOCK_UNUSED)) { if (operation == EGG_OPTION_SET) socklist[i].flags |= sock_options; else if (operation == EGG_OPTION_UNSET) socklist[i].flags &= ~sock_options; else return -2; return 0; } } return -1; } /* Return a free entry in the socket entry */ int allocsock(int sock, int options) { for (int i = 0; i < MAXSOCKS; i++) { if (socklist[i].flags & SOCK_UNUSED) { /* yay! there is table space */ socklist[i].inbuf = socklist[i].outbuf = NULL; socklist[i].inbuflen = socklist[i].outbuflen = 0; #ifdef HAVE_SSL socklist[i].ssl = NULL; #endif /* HAVE_SSL */ socklist[i].flags = options; socklist[i].sock = sock; socklist[i].encstatus = 0; socklist[i].gz = 0; egg_bzero(&socklist[i].okey, sizeof(socklist[i].okey)); egg_bzero(&socklist[i].ikey, sizeof(socklist[i].ikey)); socklist[i].okey[0] = 0; socklist[i].ikey[0] = 0; socks_total++; sdprintf("allocsock(%d) = %d", i, sock); return i; } } fatal("Socket table is full!", 0); return -1; /* Never reached */ } /* Request a normal socket for i/o */ void setsock(int sock, int options) { int i = allocsock(sock, options); bool parm; if (((sock != STDOUT) || backgrd) && !(socklist[i].flags & SOCK_NONSOCK)) { parm = 1; setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &parm, sizeof(int)); parm = 0; setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &parm, sizeof(int)); } if (options & SOCK_LISTEN) { /* Tris says this lets us grab the same port again next time */ parm = 1; setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &parm, sizeof(int)); } /* Yay async i/o ! */ fcntl(sock, F_SETFL, O_NONBLOCK); } #ifdef USE_IPV6 int real_getsock(int options, int af_def, char *fname, int line) { #else int real_getsock(int options, char *fname, int line) { int af_def = AF_INET; #endif /* USE_IPV6 */ int sock = socket(af_def, SOCK_STREAM, 0); if (sock >= 0) setsock(sock, options); else if (!identd_hack) putlog(LOG_WARNING, "*", "Warning: Can't create new socket! (%s:%d)", fname, line); else if (identd_hack) identd_hack = 0; return sock; } #ifdef HAVE_SSL void dropssl(register int sock) { if (sock < 0) return; int i; for (i = 0; (i < MAXSOCKS); i++) if (socklist[i].sock == sock) break; if (socklist[i].ssl) { SSL_set_quiet_shutdown(socklist[i].ssl, 1); SSL_shutdown(socklist[i].ssl); usleep(1000 * 500); SSL_free(socklist[i].ssl); usleep(1000 * 500); socklist[i].ssl = NULL; } } #endif /* HAVE_SSL */ /* Done with a socket */ void real_killsock(register int sock, const char *file, int line) { if (sock < 0) { putlog(LOG_ERRORS, "*", "Attempt to kill socket -1 %s:%d", file, line); return; } for (register int i = 0; i < MAXSOCKS; i++) { if ((socklist[i].sock == sock) && !(socklist[i].flags & SOCK_UNUSED)) { #ifdef HAVE_SSL dropssl(sock); #endif /* HAVE_SSL */ close(socklist[i].sock); if (socklist[i].inbuf != NULL) { free(socklist[i].inbuf); socklist[i].inbuf = NULL; } if (socklist[i].outbuf != NULL) { free(socklist[i].outbuf); socklist[i].outbuf = NULL; socklist[i].outbuflen = 0; } if (socklist[i].host) free(socklist[i].host); egg_bzero(&socklist[i], sizeof(socklist[i])); socklist[i].flags = SOCK_UNUSED; socks_total--; sdprintf("killsock(%d, %s, %d) (socklist: %d)", sock, file, line, i); return; } } putlog(LOG_MISC, "*", "Attempt to kill un-allocated socket %d %s:%d !!", sock, file, line); } /* Send connection request to proxy */ static int proxy_connect(int sock, char *host, int port, int proxy) { #ifdef USE_IPV6 unsigned char x[32] = ""; int af_ty = sockprotocol(sock); #else unsigned char x[10] = ""; #endif /* USE_IPV6 */ char s[256] = ""; /* socks proxy */ if (proxy == PROXY_SOCKS) { /* numeric IP? */ #ifdef USE_IPV6 if ((host[strlen(host) - 1] >= '0' && host[strlen(host) - 1] <= '9') && af_ty != AF_INET6) { #else if (host[strlen(host) - 1] >= '0' && host[strlen(host) - 1] <= '9') { #endif /* USE_IPV6 */ in_addr_t ip = ((in_addr_t) inet_addr(host)); egg_memcpy(x, &ip, 4); } else { struct hostent *hp = NULL; /* no, must be host.domain */ if (!setjmp(alarmret)) { #ifdef USE_IPV6 alarm(resolve_timeout); if (af_ty == AF_INET6) hp = gethostbyname(host); else #endif /* USE_IPV6 */ hp = gethostbyname(host); #ifdef USE_IPV6 alarm(0); #endif /* USE_IPV6 */ } else hp = NULL; if (hp == NULL) { killsock(sock); return -2; } egg_memcpy(x, hp->h_addr, hp->h_length); } for (int i = 0; i < MAXSOCKS; i++) if (!(socklist[i].flags & SOCK_UNUSED) && socklist[i].sock == sock) socklist[i].flags |= SOCK_PROXYWAIT; /* drummer */ #ifdef USE_IPV6 if (af_ty == AF_INET6) egg_snprintf(s, sizeof s, "\004\001%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%s", (port >> 8) % 256, (port % 256), x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7], x[9], x[9], x[10], x[11], x[12], x[13], x[14], x[15], botuser); else #endif /* USE_IPV6 */ egg_snprintf(s, sizeof s, "\004\001%c%c%c%c%c%c%s", (port >> 8) % 256, (port % 256), x[0], x[1], x[2], x[3], botuser); tputs(sock, s, strlen(botuser) + 9); /* drummer */ } else if (proxy == PROXY_SUN) { egg_snprintf(s, sizeof s, "%s %d\n", host, port); tputs(sock, s, strlen(s)); /* drummer */ } else if (proxy == PROXY_HTTP) { egg_snprintf(s, sizeof s, "CONNECT %s:%d\n\n", host, port); tputs(sock, s, strlen(s)); } return sock; } /* FIXME: REPLACE WITH SOCK_NAME() */ void initialize_sockaddr(int af_type, const char *host, port_t port, union sockaddr_union *so) { egg_bzero(so, sizeof(*so)); so->sa.sa_family = af_type; if (af_type == AF_INET) { so->sin.sin_family = AF_INET; if (host) { inet_pton(AF_INET, host, &so->sin.sin_addr); so->sin.sin_port = htons(port); } else { so->sin.sin_addr.s_addr = getmyip(); } #ifdef USE_IPV6 } else { so->sin6.sin6_family = AF_INET6; if (host) { inet_pton(AF_INET6, host, &so->sin6.sin6_addr); so->sin6.sin6_port = htons(port); } else { memcpy(&so->sin6.sin6_addr, &cached_myip6_so.sin6.sin6_addr, 16); } #endif /* USE_IPV6 */ } } /* Starts a connection attempt to a socket * * If given a normal hostname, this will be resolved to the corresponding * IP address first. PLEASE try to use the non-blocking dns functions * instead and then call this function with the IP address to avoid blocking. * * returns <0 if connection refused: * -1 strerror()/errno type error * -2 can't resolve hostname */ int open_telnet_raw(int sock, char *server, port_t sport) { static port_t port = 0; union sockaddr_union so; char host[121] = ""; volatile int proxy; int is_resolved = 0; /* firewall? use socks */ if (firewall[0]) { if (firewall[0] == '!') { proxy = PROXY_SUN; strcpy(host, &firewall[1]); } else if (firewall[0] == '@') { proxy = PROXY_HTTP; strcpy(host, &firewall[1]); } else { proxy = PROXY_SOCKS; strcpy(host, firewall); } port = firewallport; } else { proxy = 0; strncpyz(host, server, sizeof host); port = sport; } /* figure out which ip to bind to locally (v4 or v6) based on what the host ip is .. */ if ((is_resolved = is_dotted_ip(server))) { /* already resolved */ initialize_sockaddr(is_resolved, NULL, 0, &so); if (bind(sock, &so.sa, SIZEOF_SOCKADDR(so)) < 0) return -1; initialize_sockaddr(is_resolved, host, port, &so); } else { /* if not resolved, resolve it with blocking calls.. (shouldn't happen ever) */ sdprintf("WARNING: open_telnet_raw() is about to block in get_ip()!"); if (!setjmp(alarmret)) { alarm(resolve_timeout); if (!get_ip(host, &so)) { alarm(0); /* ok, we resolved it, bind an appropriate ip */ #ifdef USE_IPV6 if (so.sa.sa_family == AF_INET6) { if (bind(sock, &cached_myip6_so.sa, SIZEOF_SOCKADDR(cached_myip6_so)) < 0) { killsock(sock); return -1; } } else { #endif /* USE_IPV6 */ if (bind(sock, &cached_myip4_so.sa, SIZEOF_SOCKADDR(cached_myip4_so)) < 0) { killsock(sock); return -3; } #ifdef USE_IPV6 } if (so.sa.sa_family == AF_INET6) so.sin6.sin6_port = htons(port); else #endif /* USE_IPV6 */ so.sin.sin_port = htons(port); } else { alarm(0); killsock(sock); return -2; } } } for (int i = 0; i < MAXSOCKS; i++) { if (!(socklist[i].flags & SOCK_UNUSED) && (socklist[i].sock == sock)) { socklist[i].flags = (socklist[i].flags & ~SOCK_VIRTUAL) | SOCK_CONNECT; socklist[i].host = strdup(server); socklist[i].port = port; } } int rc = connect(sock, &so.sa, SIZEOF_SOCKADDR(so)); if (rc < 0) { if (errno == EINPROGRESS) { /* Firewall? announce connect attempt to proxy */ if (firewall[0]) return proxy_connect(sock, server, sport, proxy); return sock; /* async success! */ } else { sdprintf("connect(%s) failed: %s", server, strerror(errno)); killsock(sock); return -1; } } /* Synchronous? :/ */ if (firewall[0]) return proxy_connect(sock, server, sport, proxy); return sock; } /* Ordinary non-binary connection attempt */ int open_telnet(char *server, port_t port) { int sock = -1; #ifdef USE_IPV6 sock = getsock(0, hostprotocol(server)); #else sock = getsock(0); #endif /* USE_IPV6 */ if (sock >= 0) return open_telnet_raw(sock, server, port); return -1; } /* Returns a socket number for a listening socket that will accept any * connection on a certain address -- port # is returned in port * * 'addr' is ignored if af_def is AF_INET6 -poptix (02/03/03) */ #ifdef USE_IPV6 int open_address_listen(in_addr_t addr, int af_def, port_t *port) #else intt open_address_listen(in_addr_t addr, port_t *port) #endif /* USE_IPV6 */ { if (firewall[0]) { /* FIXME: can't do listen port thru firewall yet */ putlog(LOG_MISC, "*", "!! Cant open a listen port (you are using a firewall)"); return -1; } int sock = 0; socklen_t addrlen; struct sockaddr_in name; #ifdef USE_IPV6 if (af_def == AF_INET6) { struct sockaddr_in6 name6; sock = getsock(SOCK_LISTEN, af_def); if (sock < 0) return -1; debug2("Opening listen socket on port %d with AF_INET6, sock: %d", *port, sock); egg_bzero((char *) &name6, sizeof(name6)); name6.sin6_family = af_def; name6.sin6_port = htons(*port); /* 0 = just assign us a port */ /* memcpy(&name6.sin6_addr, &in6addr_any, 16); */ /* this is the only way to get ipv6+ipv4 in 1 socket */ memcpy(&name6.sin6_addr, &cached_myip6_so.sin6.sin6_addr, 16); if (bind(sock, (struct sockaddr *) &name6, sizeof(name6)) < 0) { sdprintf("Failed to open sock '%d' for listen on port '%d'", sock, *port); killsock(sock); return -1; } addrlen = sizeof(name6); if (getsockname(sock, (struct sockaddr *) &name6, &addrlen) < 0) { sdprintf("Failed to open sock '%d' for listen on port '%d'", sock, *port); killsock(sock); return -1; } *port = ntohs(name6.sin6_port); if (listen(sock, 1) < 0) { sdprintf("Failed to open sock '%d' for listen on port '%d'", sock, *port); killsock(sock); return -1; } } else { sock = getsock(SOCK_LISTEN, AF_INET); #else sock = getsock(SOCK_LISTEN); #endif /* USE_IPV6 */ if (sock < 0) return -1; debug2("Opening listen socket on port %d with AF_INET, sock: %d", *port, sock); egg_bzero((char *) &name, sizeof(struct sockaddr_in)); name.sin_family = AF_INET; name.sin_port = htons(*port); /* 0 = just assign us a port */ name.sin_addr.s_addr = addr; if (bind(sock, (struct sockaddr *) &name, sizeof(name)) < 0) { sdprintf("Failed to open sock '%d' for listen on port '%d'", sock, *port); killsock(sock); return -1; } /* what port are we on? */ addrlen = sizeof(name); if (getsockname(sock, (struct sockaddr *) &name, &addrlen) < 0) { sdprintf("Failed to open sock '%d' for listen on port '%d'", sock, *port); killsock(sock); return -1; } *port = ntohs(name.sin_port); if (listen(sock, 1) < 0) { sdprintf("Failed to open sock '%d' for listen on port '%d'", sock, *port); killsock(sock); return -1; } #ifdef USE_IPV6 } #endif /* USE_IPV6 */ debug2("Opened listen socket on port %d with AF_INET, sock: %d", *port, sock); return sock; } /* Returns a socket number for a listening socket that will accept any * connection -- port # is returned in port */ int open_listen(port_t *port) { #ifdef USE_IPV6 return open_address_listen(getmyip(), AF_INET, port); #else return open_address_listen(getmyip(), port); #endif /* USE_IPV6 */ } /* Same as above, except this one can be called with an AF_ type * the above is being left in for compatibility, and should NOT LONGER BE USED IN THE CORE CODE. */ int open_listen_by_af(port_t *port, int af_def) { #ifdef USE_IPV6 return open_address_listen(getmyip(), af_def, port); #else return -1; #endif /* USE_IPV6 */ } #ifdef HAVE_SSL int ssl_link(register int sock, int state) { int err = 0, i = 0, errs = 0; debug2("ssl_link(%d, %d)", sock, state); for (i = 0; (i < MAXSOCKS); i++) { if (socklist[i].sock == sock) break; } if (socklist[i].ssl) { putlog(LOG_ERROR, "*", "Switching to SSL (%d,%d) - already active", state, sock); return 0; } if (state == CONNECT_SSL) { socklist[i].ssl = SSL_new(ssl_c_ctx); } else if (state == ACCEPT_SSL) { socklist[i].ssl = SSL_new(ssl_s_ctx); } if (!socklist[i].ssl) { putlog(LOG_ERROR, "*", "Switching to SSL (%d) - SSL_new(%d) failed", sock, state); return 0; } if (!SSL_set_fd(socklist[i].ssl, socklist[i].sock)) { putlog(LOG_ERROR, "*", "SSL_set_fd(%d) (%d) failed", state, socklist[i].sock); return 0; } if (state == CONNECT_SSL) { SSL_set_connect_state(socklist[i].ssl); } else if (state == ACCEPT_SSL) { SSL_set_accept_state(socklist[i].ssl); } else { putlog(LOG_DEBUG, "*", "ssl_link(%d, 0?) NO STATE?", sock); return 0; } if (state == CONNECT_SSL) { err = SSL_connect(socklist[i].ssl); } else if (state == ACCEPT_SSL) { err = SSL_accept(socklist[i].ssl); } if (!setjmp(alarmret)) { alarm(5); /* this is plenty of time */ while ((err < 1) && (errno == EAGAIN)) { if (state == CONNECT_SSL) { err = SSL_connect(socklist[i].ssl); } else if (state == ACCEPT_SSL) { err = SSL_accept(socklist[i].ssl); } /* if ((errs!=SSL_ERROR_WANT_READ)&&(errs!=SSL_ERROR_WANT_WRITE)&& (errs!=SSL_ERROR_WANT_X509_LOOKUP)) */ /* break; anything not one of these is a sufficient condition to break out... */ } alarm(0); } errs = SSL_get_error(socklist[i].ssl, err); putlog(LOG_DEBUG, "*", "SSL_link(%d, %d) = %d, errs: %d (%d), %s", sock, state, err, errs, errno, (char *)ERR_error_string(ERR_get_error(), NULL)); if (errno) putlog(LOG_DEBUG, "*", "errno %d: %s", errno, strerror(errno)); if (err == 1) { putlog(LOG_ERROR, "*", "SSL_link(%d, %d) was successfull", sock, state); return 1; } else { putlog(LOG_ERROR, "*", "SSL_link(%d, %d) failed", sock, state); dropssl(socklist[i].sock); } return 0; } #endif /* HAVE_SSL */ /* Returns the given network byte order IP address in the * dotted format - "##.##.##.##" */ char *iptostr(in_addr_t ip) { static char ipbuf[32]; struct in_addr a; a.s_addr = ip; return (char *) egg_inet_ntop(AF_INET, &a, ipbuf, sizeof(ipbuf)); } /* Short routine to answer a connect received on a socket made previously * by open_listen ... returns hostname of the caller & the new socket * does NOT dispose of old "public" socket! */ int answer(int sock, char *caller, in_addr_t *ip, port_t *port, int binary) { int new_sock; socklen_t addrlen; struct sockaddr_in from; #ifdef USE_IPV6 int af_ty = sockprotocol(sock); struct sockaddr_in6 from6; egg_bzero(&from6, sizeof(struct sockaddr_in6)); if (af_ty == AF_INET6) { addrlen = sizeof(from6); new_sock = accept(sock, (struct sockaddr *) &from6, &addrlen); } else { #endif /* USE_IPV6 */ addrlen = sizeof(struct sockaddr); new_sock = accept(sock, (struct sockaddr *) &from, &addrlen); #ifdef USE_IPV6 } #endif /* USE_IPV6 */ if (new_sock < 0) return -1; if (ip != NULL) { #ifdef USE_IPV6 /* Detect IPv4 in IPv6 mapped address .... */ if (af_ty == AF_INET6 && (!IN6_IS_ADDR_V4MAPPED(&from6.sin6_addr))) { egg_inet_ntop(AF_INET6, &from6.sin6_addr, caller, 119); caller[120] = 0; *ip = 0L; } else if (IN6_IS_ADDR_V4MAPPED(&from6.sin6_addr)) { /* ...and convert it to plain (AF_INET) IPv4 address (openssh) */ struct sockaddr_in *from4 = (struct sockaddr_in *)&from6; struct in_addr addr; memcpy(&addr, ((char *)&from6.sin6_addr) + 12, sizeof(addr)); egg_memset(&from, 0, sizeof(from)); from4->sin_family = AF_INET; addrlen = sizeof(*from4); memcpy(&from4->sin_addr, &addr, sizeof(addr)); *ip = from4->sin_addr.s_addr; strncpyz(caller, iptostr(*ip), 121); *ip = ntohl(*ip); } else { #endif /* USE_IPV6 */ *ip = from.sin_addr.s_addr; strncpyz(caller, iptostr(*ip), 121); *ip = ntohl(*ip); #ifdef USE_IPV6 } #endif /* USE_IPV6 */ } if (port != NULL) { #ifdef USE_IPV6 if (af_ty == AF_INET6) *port = ntohs(from6.sin6_port); else #endif /* USE_IPV6 */ *port = ntohs(from.sin_port); } /* Set up all the normal socket crap */ setsock(new_sock, (binary ? SOCK_BINARY : 0)); sdprintf("Answered socket %d: %s", new_sock, caller); return new_sock; } /* Like open_telnet, but uses server & port specifications of dcc */ int open_telnet_dcc(int sock, char *server, char *port) { port_t p; unsigned long addr; char sv[500] = ""; unsigned char c[4] = ""; #ifdef DEBUG_IPV6 debug1("open_telnet_dcc %s", server); #endif /* DEBUG_IPV6 */ if (port != NULL) p = atoi(port); else p = 2000; #ifdef USE_IPV6 if (sockprotocol(sock) == AF_INET6) { # ifdef DEBUG_IPV6 debug0("open_telnet_dcc, af_inet6!"); # endif /* DEBUG_IPV6 */ strncpyz(sv, server, sizeof sv); debug2("%s should be %s",sv,server); } else { #endif /* USE_IPV6 */ if (server != NULL) addr = my_atoul(server); else addr = 0L; if (addr < (1 << 24)) return -3; /* fake address */ c[0] = (addr >> 24) & 0xff; c[1] = (addr >> 16) & 0xff; c[2] = (addr >> 8) & 0xff; c[3] = addr & 0xff; sprintf(sv, "%u.%u.%u.%u", c[0], c[1], c[2], c[3]); #ifdef USE_IPV6 } /* strcpy(sv,hostnamefromip(addr)); */ # ifdef DEBUG_IPV6 debug3("open_telnet_raw %s %d %d", sv, sock, p); # endif /* DEBUG_IPV6 */ #endif /* USE_IPV6 */ return open_telnet_raw(sock, sv, p); } /* Attempts to read from all the sockets in socklist * fills s with up to 511 bytes if available, and returns the array index * * on EOF: returns -1, with socket in len * on socket error: returns -2 * if nothing is ready: returns -3 */ static int sockread(char *s, int *len) { fd_set fd; int fds = 0, i, fdtmp, x; struct timeval t; int grab = SGRAB + 1; egg_timeval_t howlong; if (timer_get_shortest(&howlong)) { /* No timer, default to 1 second. */ t.tv_sec = 1; t.tv_usec = 0; } else { t.tv_sec = howlong.sec; t.tv_usec = howlong.usec; } FD_ZERO(&fd); for (i = 0; i < MAXSOCKS; i++) { if (!(socklist[i].flags & (SOCK_UNUSED | SOCK_VIRTUAL))) { if ((socklist[i].sock == STDOUT) && !backgrd) fdtmp = STDIN; else fdtmp = socklist[i].sock; if (fdtmp > fds) fds = fdtmp; FD_SET(fdtmp, &fd); } } fds++; x = select(fds, &fd, NULL, NULL, &t); if (x > 0) { /* Something happened */ for (i = 0; i < MAXSOCKS; i++) { if ((!(socklist[i].flags & SOCK_UNUSED)) && ((FD_ISSET(socklist[i].sock, &fd)) || #ifdef HAVE_SSL ((socklist[i].ssl) && (SSL_pending(socklist[i].ssl))) || #endif /* HAVE_SSL */ ((socklist[i].sock == STDOUT) && (!backgrd) && (FD_ISSET(STDIN, &fd))))) { if (socklist[i].flags & (SOCK_LISTEN | SOCK_CONNECT)) { /* Listening socket -- don't read, just return activity */ /* Same for connection attempt */ /* (for strong connections, require a read to succeed first) */ if (socklist[i].flags & SOCK_PROXYWAIT) { /* drummer */ /* Hang around to get the return code from proxy */ grab = 10; } else if (!(socklist[i].flags & SOCK_STRONGCONN)) { debug1("net: connect! sock %d", socklist[i].sock); s[0] = 0; *len = 0; #ifdef HAVE_SSL /* debug0("CALLING SSL_LINK() FROM SOCKREAD"); if (!ssl_link(socklist[i].sock)) debug0("SSL_LINK FAILED"); debug0("BACK FROM SSL_LINK()"); */ #endif /* HAVE_SSL */ return i; } } else if (socklist[i].flags & SOCK_PASS) { s[0] = 0; *len = 0; return i; } errno = 0; if ((socklist[i].sock == STDOUT) && !backgrd) x = read(STDIN, s, grab); else { #ifdef HAVE_SSL if (socklist[i].ssl) { x = SSL_read(socklist[i].ssl, s, grab); if (x < 0) { int err = SSL_get_error(socklist[i].ssl, x); x = -1; switch (err) { case SSL_ERROR_WANT_READ: errno = EAGAIN; break; case SSL_ERROR_WANT_WRITE: errno = EAGAIN; break; case SSL_ERROR_WANT_X509_LOOKUP: errno = EAGAIN; break; } } } else #endif /* HAVE_SSL */ x = read(socklist[i].sock, s, grab); } if (x <= 0) { /* eof */ if (errno != EAGAIN) { /* EAGAIN happens when the operation would block on a non-blocking socket, if the socket is going to die, it will die later, otherwise it will connect */ *len = socklist[i].sock; socklist[i].flags &= ~SOCK_CONNECT; debug1("net: eof!(read) socket %d", socklist[i].sock); return -1; } else { debug3("sockread EAGAIN: %d %d (%s)", socklist[i].sock, errno, strerror(errno)); continue; /* EAGAIN */ } } s[x] = 0; *len = x; if (socklist[i].flags & SOCK_PROXYWAIT) { debug2("net: socket: %d proxy errno: %d", socklist[i].sock, s[1]); socklist[i].flags &= ~(SOCK_CONNECT | SOCK_PROXYWAIT); switch (s[1]) { case 90: /* Success */ s[0] = 0; *len = 0; return i; case 91: /* Failed */ errno = ECONNREFUSED; break; case 92: /* No identd */ case 93: /* Identd said wrong username */ /* A better error message would be "socks misconfigured" * or "identd not working" but this is simplest. */ errno = ENETUNREACH; break; } *len = socklist[i].sock; return -1; } return i; } } } else if (x == -1) return -2; /* socket error */ else { s[0] = 0; *len = 0; } return -3; } inline static int prand(int *seed, int range) { long long i1 = *seed; i1 = (i1 * 0x08088405 + 1) & 0xFFFFFFFF; *seed = i1; return ((i1 * range) >> 32); } char *botlink_decrypt(int snum, char *src) { char *line = decrypt_string(socklist[snum].ikey, src); strcpy(src, line); free(line); if (socklist[snum].iseed) { *(dword *) & socklist[snum].ikey[0] = prand(&socklist[snum].iseed, 0xFFFFFFFF); *(dword *) & socklist[snum].ikey[4] = prand(&socklist[snum].iseed, 0xFFFFFFFF); *(dword *) & socklist[snum].ikey[8] = prand(&socklist[snum].iseed, 0xFFFFFFFF); *(dword *) & socklist[snum].ikey[12] = prand(&socklist[snum].iseed, 0xFFFFFFFF); if (!socklist[snum].iseed) socklist[snum].iseed++; } return src; } char *botlink_encrypt(int snum, char *src, size_t *len) { char *srcbuf = NULL, *buf = NULL, *line = NULL, *eol = NULL, *eline = NULL; size_t bufpos = 0; srcbuf = (char *) calloc(1, *len + 9 + 1); strcpy(srcbuf, src); line = srcbuf; eol = strchr(line, '\n'); while (eol) { *eol++ = 0; eline = encrypt_string(socklist[snum].okey, line); if (socklist[snum].oseed) { *(dword *) & socklist[snum].okey[0] = prand(&socklist[snum].oseed, 0xFFFFFFFF); *(dword *) & socklist[snum].okey[4] = prand(&socklist[snum].oseed, 0xFFFFFFFF); *(dword *) & socklist[snum].okey[8] = prand(&socklist[snum].oseed, 0xFFFFFFFF); *(dword *) & socklist[snum].okey[12] = prand(&socklist[snum].oseed, 0xFFFFFFFF); if (!socklist[snum].oseed) socklist[snum].oseed++; } buf = (char *) realloc(buf, bufpos + strlen(eline) + 1 + 9); strcpy((char *) &buf[bufpos], eline); free(eline); strcat(buf, "\n"); bufpos = strlen(buf); line = eol; eol = strchr(line, '\n'); } if (line[0]) { eline = encrypt_string(socklist[snum].okey, line); if (socklist[snum].oseed) { *(dword *) & socklist[snum].okey[0] = prand(&socklist[snum].oseed, 0xFFFFFFFF); *(dword *) & socklist[snum].okey[4] = prand(&socklist[snum].oseed, 0xFFFFFFFF); *(dword *) & socklist[snum].okey[8] = prand(&socklist[snum].oseed, 0xFFFFFFFF); *(dword *) & socklist[snum].okey[12] = prand(&socklist[snum].oseed, 0xFFFFFFFF); if (!socklist[snum].oseed) socklist[snum].oseed++; } buf = (char *) realloc(buf, bufpos + strlen(eline) + 1 + 9); strcpy((char *) &buf[bufpos], eline); free(eline); strcat(buf, "\n"); } free(srcbuf); *len = strlen(buf); return buf; } /* sockgets: buffer and read from sockets * * Attempts to read from all registered sockets for up to one second. if * after one second, no complete data has been received from any of the * sockets, 's' will be empty, 'len' will be 0, and sockgets will return -3. * if there is returnable data received from a socket, the data will be * in 's' (null-terminated if non-binary), the length will be returned * in len, and the socket number will be returned. * normal sockets have their input buffered, and each call to sockgets * will return one line terminated with a '\n'. binary sockets are not * buffered and return whatever coems in as soon as it arrives. * listening sockets will return an empty string when a connection comes in. * connecting sockets will return an empty string on a successful connect, * or EOF on a failed connect. * if an EOF is detected from any of the sockets, that socket number will be * put in len, and -1 will be returned. * the maximum length of the string returned is 512 (including null) * * Returns -4 if we handled something that shouldn't be handled by the * dcc functions. Simply ignore it. */ int sockgets(char *s, int *len) { char xx[SGRAB + 4] = "", *p = NULL, *px = NULL; int ret; for (int i = 0; i < MAXSOCKS; i++) { /* Check for stored-up data waiting to be processed */ if (!(socklist[i].flags & SOCK_UNUSED) && !(socklist[i].flags & SOCK_BUFFER) && (socklist[i].inbuf != NULL)) { if (!(socklist[i].flags & SOCK_BINARY)) { /* look for \r too cos windows can't follow RFCs */ p = strchr(socklist[i].inbuf, '\n'); if (p == NULL) p = strchr(socklist[i].inbuf, '\r'); if (p != NULL) { *p = 0; if (strlen(socklist[i].inbuf) > SGRAB) socklist[i].inbuf[SGRAB] = 0; strcpy(s, socklist[i].inbuf); px = (char *) calloc(1, strlen(p + 1) + 1); strcpy(px, p + 1); free(socklist[i].inbuf); if (px[0]) socklist[i].inbuf = px; else { free(px); socklist[i].inbuf = NULL; } /* Strip CR if this was CR/LF combo */ if (s[strlen(s) - 1] == '\r') s[strlen(s) - 1] = 0; if (socklist[i].encstatus && s[0]) botlink_decrypt(i, s); *len = strlen(s); return socklist[i].sock; } } else { /* i dont think any of this is *ever* called */ /* Handling buffered binary data (must have been SOCK_BUFFER before). */ if (socklist[i].inbuflen <= SGRAB) { *len = socklist[i].inbuflen; egg_memcpy(s, socklist[i].inbuf, socklist[i].inbuflen); free(socklist[i].inbuf); socklist[i].inbuf = NULL; socklist[i].inbuflen = 0; } else { /* Split up into chunks of SGRAB bytes. */ *len = SGRAB; egg_memcpy(s, socklist[i].inbuf, *len); egg_memcpy(socklist[i].inbuf, socklist[i].inbuf + *len, *len); socklist[i].inbuflen -= *len; socklist[i].inbuf = (char *) realloc(socklist[i].inbuf, socklist[i].inbuflen); } return socklist[i].sock; } } /* Also check any sockets that might have EOF'd during write */ if (!(socklist[i].flags & SOCK_UNUSED) && (socklist[i].flags & SOCK_EOFD)) { s[0] = 0; *len = socklist[i].sock; return -1; } } /* No pent-up data of any worth -- down to business */ *len = 0; ret = sockread(xx, len); if (ret < 0) { s[0] = 0; return ret; } /* Binary, listening and passed on sockets don't get buffered. */ if (socklist[ret].flags & SOCK_CONNECT) { if (socklist[ret].flags & SOCK_STRONGCONN) { socklist[ret].flags &= ~SOCK_STRONGCONN; /* Buffer any data that came in, for future read. */ socklist[ret].inbuflen = *len; socklist[ret].inbuf = (char *) calloc(1, *len + 1); /* It might be binary data. You never know. */ egg_memcpy(socklist[ret].inbuf, xx, *len); socklist[ret].inbuf[*len] = 0; } socklist[ret].flags &= ~SOCK_CONNECT; s[0] = 0; return socklist[ret].sock; } if (socklist[ret].flags & SOCK_BINARY) { egg_memcpy(s, xx, *len); return socklist[ret].sock; } if ((socklist[ret].flags & SOCK_LISTEN) || (socklist[ret].flags & SOCK_PASS)) return socklist[ret].sock; if (socklist[ret].flags & SOCK_BUFFER) { socklist[ret].inbuf = (char *) realloc(socklist[ret].inbuf, socklist[ret].inbuflen + *len + 1); egg_memcpy(socklist[ret].inbuf + socklist[ret].inbuflen, xx, *len); socklist[ret].inbuflen += *len; /* We don't know whether it's binary data. Make sure normal strings will be handled properly later on too. */ socklist[ret].inbuf[socklist[ret].inbuflen] = 0; return -4; /* Ignore this one. */ } /* Might be necessary to prepend stored-up data! */ if (socklist[ret].inbuf != NULL) { p = socklist[ret].inbuf; socklist[ret].inbuf = (char *) calloc(1, strlen(p) + strlen(xx) + 1); strcpy(socklist[ret].inbuf, p); strcat(socklist[ret].inbuf, xx); free(p); if (strlen(socklist[ret].inbuf) < (SGRAB + 2)) { strcpy(xx, socklist[ret].inbuf); free(socklist[ret].inbuf); socklist[ret].inbuf = NULL; socklist[ret].inbuflen = 0; } else { p = socklist[ret].inbuf; socklist[ret].inbuflen = strlen(p) - SGRAB; socklist[ret].inbuf = (char *) calloc(1, socklist[ret].inbuflen + 1); strcpy(socklist[ret].inbuf, p + SGRAB); *(p + SGRAB) = 0; strcpy(xx, p); free(p); /* (leave the rest to be post-pended later) */ } } bool data = 0; /* Look for EOL marker; if it's there, i have something to show */ p = strchr(xx, '\n'); if (p == NULL) p = strchr(xx, '\r'); if (p != NULL) { *p = 0; /* FIXME: overlapping here */ strcpy(s, xx); strcpy(xx, p + 1); /* if (s[0] && strlen(s) && (s[strlen(s) - 1] == '\r')) */ if (s[strlen(s) - 1] == '\r') s[strlen(s) - 1] = 0; data = 1; /* DCC_CHAT may now need to process a blank line */ /* NO! */ /* if (!s[0]) strcpy(s," "); */ } else { s[0] = 0; if (strlen(xx) >= SGRAB) { /* String is too long, so just insert fake \n */ strcpy(s, xx); xx[0] = 0; data = 1; } } if (socklist[ret].encstatus && s[0]) botlink_decrypt(ret, s); *len = strlen(s); /* Anything left that needs to be saved? */ if (!xx[0]) { if (data) return socklist[ret].sock; else return -3; } /* Prepend old data back */ if (socklist[ret].inbuf != NULL) { p = socklist[ret].inbuf; socklist[ret].inbuflen = strlen(p) + strlen(xx); socklist[ret].inbuf = (char *) calloc(1, socklist[ret].inbuflen + 1); strcpy(socklist[ret].inbuf, xx); strcat(socklist[ret].inbuf, p); free(p); } else { socklist[ret].inbuflen = strlen(xx); socklist[ret].inbuf = (char *) calloc(1, socklist[ret].inbuflen + 1); strcpy(socklist[ret].inbuf, xx); } if (data) { return socklist[ret].sock; } else { return -3; } } /* Dump something to a socket * * NOTE: Do NOT put Contexts in here if you want DEBUG to be meaningful!! */ void tputs(register int z, char *s, size_t len) { if (z < 0) /* um... HELLO?! sanity check please! */ return; if (((z == STDOUT) || (z == STDERR)) && (!backgrd || use_stderr)) { write(z, s, len); return; } register int x, idx; char *p = NULL; for (register int i = 0; i < MAXSOCKS; i++) { if (!(socklist[i].flags & SOCK_UNUSED) && (socklist[i].sock == z)) { for (idx = 0; idx < dcc_total; idx++) { if (dcc[idx].type && (dcc[idx].sock == z) && dcc[idx].type->name) { if (!strncmp(dcc[idx].type->name, "BOT", 3)) traffic.out_today.bn += len; else if (!strcmp(dcc[idx].type->name, "SERVER")) traffic.out_today.irc += len; else if (!strncmp(dcc[idx].type->name, "CHAT", 4)) traffic.out_today.dcc += len; else if (!strncmp(dcc[idx].type->name, "FILES", 5)) traffic.out_today.filesys += len; else if (!strcmp(dcc[idx].type->name, "SEND")) traffic.out_today.trans += len; else if (!strncmp(dcc[idx].type->name, "GET", 3)) traffic.out_today.trans += len; else traffic.out_today.unknown += len; break; } } if (socklist[i].encstatus && (len > 0)) s = botlink_encrypt(i, s, &len); /* will modify len */ if (socklist[i].outbuf != NULL) { /* Already queueing: just add it */ p = (char *) realloc(socklist[i].outbuf, socklist[i].outbuflen + len); egg_memcpy(p + socklist[i].outbuflen, s, len); socklist[i].outbuf = p; socklist[i].outbuflen += len; if (socklist[i].encstatus && s) free(s); return; } /* Try. */ #ifdef HAVE_SSL if (socklist[i].ssl) { x = SSL_write(socklist[i].ssl, s, len); if (x < 0) { int err = SSL_get_error(socklist[i].ssl, x); x = -1; switch (err) { case SSL_ERROR_WANT_READ: errno = EAGAIN; break; case SSL_ERROR_WANT_WRITE: errno = EAGAIN; break; case SSL_ERROR_WANT_X509_LOOKUP: errno = EAGAIN; break; } } } else #endif /* HAVE_SSL */ #ifdef HAVE_ZLIB_H /* if (socklist[i].gz) { FILE *fp; fp = gzdopen(z, "wb0"); x = gzwrite(fp, s, len); } else */ #endif /* HAVE_ZLIB_H */ x = write(z, s, len); if (x == -1) x = 0; if ((size_t) x < len) { /* Socket is full, queue it */ socklist[i].outbuf = (char *) calloc(1, len - x); egg_memcpy(socklist[i].outbuf, &s[x], len - x); socklist[i].outbuflen = len - x; } if (socklist[i].encstatus && s) free(s); return; } } /* Make sure we don't cause a crash by looping here */ static int inhere = 0; if (!inhere) { inhere = 1; putlog(LOG_MISC, "*", "!!! writing to nonexistent socket: %d", z); s[strlen(s) - 1] = 0; putlog(LOG_MISC, "*", "!-> '%s'", s); inhere = 0; } /* if (socklist[i].encstatus > 0) free(s); */ } int findanysnum(register int sock) { register int i = 0; if (sock != -1) for (i = 0; i < MAXSOCKS; i++) if ((socklist[i].sock == sock) && !(socklist[i].flags & SOCK_UNUSED)) return i; return -1; } static int findanyidx(register int sock) { register int j; if (sock != -1) for (j = 0; j < dcc_total; j++) if (dcc[j].type && dcc[j].sock == sock) return j; return -1; } /* tputs might queue data for sockets, let's dump as much of it as * possible. */ void dequeue_sockets() { int i, x, z = 0, fds = 0; fd_set wfds; struct timeval tv; /* ^-- start poptix test code, this should avoid writes to sockets not ready to be written to. */ FD_ZERO(&wfds); tv.tv_sec = 0; tv.tv_usec = 0; /* we only want to see if it's ready for writing, no need to actually wait.. */ for (i = 0; i < MAXSOCKS; i++) { if (!(socklist[i].flags & SOCK_UNUSED) && socklist[i].outbuf != NULL) { FD_SET(socklist[i].sock, &wfds); if (socklist[i].sock > fds) fds = socklist[i].sock; z = 1; } } if (!z) return; /* nothing to write */ fds++; select(fds, NULL, &wfds, NULL, &tv); /* end poptix */ for (i = 0; i < MAXSOCKS; i++) { if (!(socklist[i].flags & SOCK_UNUSED) && (socklist[i].outbuf != NULL) && (FD_ISSET(socklist[i].sock, &wfds))) { /* Trick tputs into doing the work */ errno = 0; #ifdef HAVE_SSL if (socklist[i].ssl) { x = write(socklist[i].sock, socklist[i].outbuf, socklist[i].outbuflen); if (x < 0) { int err = SSL_get_error(socklist[i].ssl, x); x = -1; switch (err) { case SSL_ERROR_WANT_READ: errno = EAGAIN; break; case SSL_ERROR_WANT_WRITE: errno = EAGAIN; break; case SSL_ERROR_WANT_X509_LOOKUP: errno = EAGAIN; break; } } } else #endif /* HAVE_SSL */ x = write(socklist[i].sock, socklist[i].outbuf, socklist[i].outbuflen); if ((x < 0) && (errno != EAGAIN) #ifdef EBADSLT && (errno != EBADSLT) #endif /* EBADSLT */ #ifdef ENOTCONN && (errno != ENOTCONN) #endif /* EBADSLT */ ) { /* This detects an EOF during writing */ debug3("net: eof!(write) socket %d (%s,%d)", socklist[i].sock, strerror(errno), errno); socklist[i].flags |= SOCK_EOFD; } else if ((size_t) x == socklist[i].outbuflen) { /* If the whole buffer was sent, nuke it */ free(socklist[i].outbuf); socklist[i].outbuf = NULL; socklist[i].outbuflen = 0; } else if (x > 0) { char *p = socklist[i].outbuf; /* This removes any sent bytes from the beginning of the buffer */ socklist[i].outbuf = (char *) calloc(1, socklist[i].outbuflen - x); egg_memcpy(socklist[i].outbuf, p + x, socklist[i].outbuflen - x); socklist[i].outbuflen -= x; free(p); } else { debug3("dequeue_sockets(): errno = %d (%s) on %d", errno, strerror(errno), socklist[i].sock); } /* All queued data was sent. Call handler if one exists and the * dcc entry wants it. */ if (!socklist[i].outbuf) { int idx = findanyidx(socklist[i].sock); if (idx >= 0 && dcc[idx].type && dcc[idx].type->outdone) dcc[idx].type->outdone(idx); } } } } /* * Debugging stuff */ void tell_netdebug(int idx) { char s[80] = ""; dprintf(idx, "Open sockets:"); for (int i = 0; i < MAXSOCKS; i++) { if (!(socklist[i].flags & SOCK_UNUSED)) { sprintf(s, " %d", socklist[i].sock); if (socklist[i].flags & SOCK_BINARY) strcat(s, " (binary)"); if (socklist[i].flags & SOCK_LISTEN) strcat(s, " (listen)"); if (socklist[i].flags & SOCK_PASS) strcat(s, " (passed on)"); if (socklist[i].flags & SOCK_CONNECT) strcat(s, " (connecting)"); if (socklist[i].flags & SOCK_STRONGCONN) strcat(s, " (strong)"); if (socklist[i].flags & SOCK_NONSOCK) strcat(s, " (file)"); if (socklist[i].inbuf != NULL) sprintf(&s[strlen(s)], " (inbuf: %04X)", strlen(socklist[i].inbuf)); if (socklist[i].outbuf != NULL) sprintf(&s[strlen(s)], " (outbuf: %06lX)", (unsigned long) socklist[i].outbuflen); if (socklist[i].host) sprintf(&s[strlen(s)], " (%s:%d)", socklist[i].host, socklist[i].port); strcat(s, ","); dprintf(idx, "%s", s); } } dprintf(idx, " done.\n"); } /* Checks wether the referenced socket has data queued. * * Returns true if the incoming/outgoing (depending on 'type') queues * contain data, otherwise false. */ bool sock_has_data(int type, int sock) { bool ret = 0; int i; for (i = 0; i < MAXSOCKS; i++) if (!(socklist[i].flags & SOCK_UNUSED) && socklist[i].sock == sock) break; if (i < MAXSOCKS) { switch (type) { case SOCK_DATA_OUTGOING: ret = (socklist[i].outbuf != NULL); break; case SOCK_DATA_INCOMING: ret = (socklist[i].inbuf != NULL); break; } } else debug1("sock_has_data: could not find socket #%d, returning false.", sock); return ret; }