diff options
Diffstat (limited to 'lib/erl_interface/src/connect/ei_connect.c')
| -rw-r--r-- | lib/erl_interface/src/connect/ei_connect.c | 1188 |
1 files changed, 852 insertions, 336 deletions
diff --git a/lib/erl_interface/src/connect/ei_connect.c b/lib/erl_interface/src/connect/ei_connect.c index f5034ca3e8..95cb10a20c 100644 --- a/lib/erl_interface/src/connect/ei_connect.c +++ b/lib/erl_interface/src/connect/ei_connect.c @@ -42,10 +42,8 @@ #include <inetLib.h> #include <unistd.h> -#include <sys/types.h> #include <sys/times.h> #include <unistd.h> -#include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <netinet/tcp.h> @@ -55,7 +53,6 @@ #else /* some other unix */ #include <unistd.h> -#include <sys/types.h> #include <sys/times.h> #if TIME_WITH_SYS_TIME @@ -84,6 +81,7 @@ #include <string.h> #include <errno.h> #include <ctype.h> +#include <stddef.h> #include "eiext.h" #include "ei_portio.h" @@ -98,11 +96,16 @@ #include "ei_epmd.h" #include "ei_internal.h" +static int ei_connect_initialized = 0; int ei_tracelevel = 0; #define COOKIE_FILE "/.erlang.cookie" #define EI_MAX_HOME_PATH 1024 +#define EI_SOCKET_CALLBACKS_SZ_V1 \ + (offsetof(ei_socket_callbacks, get_fd) \ + + sizeof(int (*)(void *))) + /* FIXME why not macro? */ static char *null_cookie = ""; @@ -113,30 +116,51 @@ static int get_home(char *buf, int size); static unsigned gen_challenge(void); static void gen_digest(unsigned challenge, char cookie[], unsigned char digest[16]); -static int send_status(int fd, char *status, unsigned ms); -static int recv_status(int fd, unsigned ms); -static int send_challenge(int fd, char *nodename, - unsigned challenge, unsigned version, unsigned ms); -static int recv_challenge(int fd, unsigned *challenge, - unsigned *version, - unsigned *flags, ErlConnect *namebuf, unsigned ms); -static int send_challenge_reply(int fd, unsigned char digest[16], +static int send_status(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, char *status, unsigned ms); +static int recv_status(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned ms); +static int send_challenge(ei_socket_callbacks *cbs, void *ctx, int pkt_sz, + char *nodename, unsigned challenge, + unsigned version, unsigned ms); +static int recv_challenge(ei_socket_callbacks *cbs, void *ctx, int pkt_sz, + unsigned *challenge, unsigned *version, + unsigned *flags, char *namebuf, unsigned ms); +static int send_challenge_reply(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned char digest[16], unsigned challenge, unsigned ms); -static int recv_challenge_reply(int fd, - unsigned our_challenge, +static int recv_challenge_reply(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned our_challenge, char cookie[], unsigned *her_challenge, unsigned ms); -static int send_challenge_ack(int fd, unsigned char digest[16], unsigned ms); -static int recv_challenge_ack(int fd, - unsigned our_challenge, +static int send_challenge_ack(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned char digest[16], + unsigned ms); +static int recv_challenge_ack(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned our_challenge, char cookie[], unsigned ms); -static int send_name(int fd, char *nodename, - unsigned version, unsigned ms); +static int send_name(ei_socket_callbacks *cbs, void *ctx, int pkt_sz, + char *nodename, unsigned version, unsigned ms); + +static int recv_name(ei_socket_callbacks *cbs, void *ctx, int pkt_sz, + unsigned *version, unsigned *flags, char *namebuf, + unsigned ms); -/* Common for both handshake types */ -static int recv_name(int fd, - unsigned *version, - unsigned *flags, ErlConnect *namebuf, unsigned ms); +static struct hostent* +dyn_gethostbyname_r(const char *name, struct hostent *hostp, char **buffer_p, + int buflen, int *h_errnop); + +static void abort_connection(ei_socket_callbacks *cbs, void *ctx); +static int close_connection(ei_socket_callbacks *cbs, void *ctx, int fd); + +static char * +estr(int e) +{ + char *str = strerror(e); + if (!str) + return "unknown error"; + return str; +} /*************************************************************************** @@ -149,25 +173,208 @@ static int recv_name(int fd, typedef struct ei_socket_info_s { int socket; + ei_socket_callbacks *cbs; + void *ctx; int dist_version; ei_cnode cnode; /* A copy, not a pointer. We don't know when freed */ char cookie[EI_MAX_COOKIE_SIZE+1]; } ei_socket_info; +/*************************************************************************** + * + * XXX + * + ***************************************************************************/ + +#ifndef ETHR_HAVE___atomic_compare_exchange_n +# define ETHR_HAVE___atomic_compare_exchange_n 0 +#endif +#ifndef ETHR_HAVE___atomic_load_n +# define ETHR_HAVE___atomic_load_n 0 +#endif +#ifndef ETHR_HAVE___atomic_store_n +# define ETHR_HAVE___atomic_store_n 0 +#endif + +#if defined(_REENTRANT) \ + && (!(ETHR_HAVE___atomic_compare_exchange_n & SIZEOF_VOID_P) \ + || !(ETHR_HAVE___atomic_load_n & SIZEOF_VOID_P) \ + || !(ETHR_HAVE___atomic_store_n & SIZEOF_VOID_P)) +# undef EI_DISABLE_SEQ_SOCKET_INFO +# define EI_DISABLE_SEQ_SOCKET_INFO +#endif + +#ifdef __WIN32__ +# undef EI_DISABLE_SEQ_SOCKET_INFO +# define EI_DISABLE_SEQ_SOCKET_INFO +#endif + +#ifndef EI_DISABLE_SEQ_SOCKET_INFO + +#ifdef _REENTRANT + +#define EI_ATOMIC_CMPXCHG_ACQ_REL(VARP, XCHGP, NEW) \ + __atomic_compare_exchange_n((VARP), (XCHGP), (NEW), 0, \ + __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE) +#define EI_ATOMIC_LOAD_ACQ(VARP) \ + __atomic_load_n((VARP), __ATOMIC_ACQUIRE) +#define EI_ATOMIC_STORE_REL(VARP, NEW) \ + __atomic_store_n((VARP), (NEW), __ATOMIC_RELEASE) + +#else /* ! _REENTRANT */ + +#define EI_ATOMIC_CMPXCHG_ACQ_REL(VARP, XCHGP, NEW) \ + (*(VARP) == *(XCHGP) \ + ? ((*(VARP) = (NEW)), !0) \ + : ((*(XCHGP) = *(VARP)), 0)) +#define EI_ATOMIC_LOAD_ACQ(VARP) (*(VARP)) +#define EI_ATOMIC_STORE_REL(VARP, NEW) (*(VARP) = (NEW)) + +#endif /* ! _REENTRANT */ + +#define EI_SOCKET_INFO_SEG_BITS 5 +#define EI_SOCKET_INFO_SEG_SIZE (1 << EI_SOCKET_INFO_SEG_BITS) +#define EI_SOCKET_INFO_SEG_MASK (EI_SOCKET_INFO_SEG_SIZE - 1) + +typedef struct { + int max_fds; + ei_socket_info *segments[1]; /* Larger in reality... */ +} ei_socket_info_data__; + +static ei_socket_info_data__ *socket_info_data = NULL; + +static int init_socket_info(int late) +{ + int max_fds; + int i; + size_t segments_len; + ei_socket_info_data__ *info_data, *xchg; + + if (EI_ATOMIC_LOAD_ACQ(&socket_info_data) != NULL) + return 0; /* Already initialized... */ + +#if defined(HAVE_SYSCONF) && defined(_SC_OPEN_MAX) + max_fds = sysconf(_SC_OPEN_MAX); +#else + max_fds = 1024; +#endif + + if (max_fds < 0) + return EIO; + + segments_len = ((max_fds-1)/EI_SOCKET_INFO_SEG_SIZE + 1); + + info_data = malloc(sizeof(ei_socket_info_data__) + + (sizeof(ei_socket_info *)*(segments_len-1))); + if (!info_data) + return ENOMEM; + + info_data->max_fds = max_fds; + for (i = 0; i < segments_len; i++) + info_data->segments[i] = NULL; + + xchg = NULL; + if (!EI_ATOMIC_CMPXCHG_ACQ_REL(&socket_info_data, &xchg, info_data)) + free(info_data); /* Already initialized... */ + + return 0; +} + +static int put_ei_socket_info(int fd, int dist_version, char* cookie, ei_cnode *ec, + ei_socket_callbacks *cbs, void *ctx) +{ + int six; + ei_socket_info *seg, *si; + int socket; + + if (fd < 0 || socket_info_data->max_fds <= fd) + return -1; + + socket = fd; + six = fd >> EI_SOCKET_INFO_SEG_BITS; + seg = EI_ATOMIC_LOAD_ACQ(&socket_info_data->segments[six]); + + if (!seg) { + ei_socket_info *xchg; + int i; + seg = malloc(sizeof(ei_socket_info)*EI_SOCKET_INFO_SEG_SIZE); + if (!seg) + return -1; + for (i = 0; i < EI_SOCKET_INFO_SEG_SIZE; i++) { + seg[i].socket = -1; + } + + xchg = NULL; + if (!EI_ATOMIC_CMPXCHG_ACQ_REL(&socket_info_data->segments[six], &xchg, seg)) { + free(seg); + seg = xchg; + } + } + + si = &seg[fd & EI_SOCKET_INFO_SEG_MASK]; + + if (dist_version < 0) { + socket = -1; + si->cbs = NULL; + si->ctx = NULL; + } + else { + si->dist_version = dist_version; + si->cnode = *ec; + si->cbs = cbs; + si->ctx = ctx; + strcpy(si->cookie, cookie); + } + + EI_ATOMIC_STORE_REL(&si->socket, socket); + + return 0; +} + +static ei_socket_info* get_ei_socket_info(int fd) +{ + int six, socket; + ei_socket_info *seg, *si; + + if (fd < 0 || socket_info_data->max_fds <= fd) + return NULL; + + six = fd >> EI_SOCKET_INFO_SEG_BITS; + seg = EI_ATOMIC_LOAD_ACQ(&socket_info_data->segments[six]); + + if (!seg) + return NULL; + + si = &seg[fd & EI_SOCKET_INFO_SEG_MASK]; + socket = EI_ATOMIC_LOAD_ACQ(&si->socket); + if (socket != fd) + return NULL; + return si; +} + +#else /* EI_DISABLE_SEQ_SOCKET_INFO */ + int ei_n_sockets = 0, ei_sz_sockets = 0; ei_socket_info *ei_sockets = NULL; + #ifdef _REENTRANT ei_mutex_t* ei_sockets_lock = NULL; #endif /* _REENTRANT */ +static int init_socket_info(int late) +{ +#ifdef _REENTRANT + if (late) + return ENOTSUP; /* Refuse doing unsafe initialization... */ + ei_sockets_lock = ei_mutex_create(); + if (!ei_sockets_lock) + return ENOMEM; +#endif /* _REENTRANT */ + return 0; +} -/*************************************************************************** - * - * XXX - * - ***************************************************************************/ - -static int put_ei_socket_info(int fd, int dist_version, char* cookie, ei_cnode *ec) +static int put_ei_socket_info(int fd, int dist_version, char* cookie, ei_cnode *ec, + ei_socket_callbacks *cbs, void *ctx) { int i; @@ -177,11 +384,13 @@ static int put_ei_socket_info(int fd, int dist_version, char* cookie, ei_cnode * for (i = 0; i < ei_n_sockets; ++i) { if (ei_sockets[i].socket == fd) { if (dist_version == -1) { - memmove(&ei_sockets[i], &ei_sockets[i+1], + memmove(&ei_sockets[i], &ei_sockets[i+1], sizeof(ei_sockets[0])*(ei_n_sockets-i-1)); } else { ei_sockets[i].dist_version = dist_version; /* Copy the content, see ei_socket_info */ + ei_sockets[i].cbs = cbs; + ei_sockets[i].ctx = ctx; ei_sockets[i].cnode = *ec; strcpy(ei_sockets[i].cookie, cookie); } @@ -204,7 +413,9 @@ static int put_ei_socket_info(int fd, int dist_version, char* cookie, ei_cnode * } ei_sockets[ei_n_sockets].socket = fd; ei_sockets[ei_n_sockets].dist_version = dist_version; - ei_sockets[i].cnode = *ec; + ei_sockets[ei_n_sockets].cnode = *ec; + ei_sockets[ei_n_sockets].cbs = cbs; + ei_sockets[ei_n_sockets].ctx = ctx; strcpy(ei_sockets[ei_n_sockets].cookie, cookie); ++ei_n_sockets; } @@ -214,14 +425,6 @@ static int put_ei_socket_info(int fd, int dist_version, char* cookie, ei_cnode * return 0; } -#if 0 -/* FIXME not used ?! */ -static int remove_ei_socket_info(int fd, int dist_version, char* cookie) -{ - return put_ei_socket_info(fd, -1, NULL); -} -#endif - static ei_socket_info* get_ei_socket_info(int fd) { int i; @@ -243,6 +446,13 @@ static ei_socket_info* get_ei_socket_info(int fd) return NULL; } +#endif /* EI_DISABLE_SEQ_SOCKET_INFO */ + +static int remove_ei_socket_info(int fd) +{ + return put_ei_socket_info(fd, -1, NULL, NULL, NULL, NULL); +} + ei_cnode *ei_fd_to_cnode(int fd) { ei_socket_info *sockinfo = get_ei_socket_info(fd); @@ -250,6 +460,19 @@ ei_cnode *ei_fd_to_cnode(int fd) return &sockinfo->cnode; } +int ei_get_cbs_ctx__(ei_socket_callbacks **cbs, void **ctx, int fd) +{ + ei_socket_info *sockinfo = get_ei_socket_info(fd); + if (sockinfo) { + *cbs = sockinfo->cbs; + *ctx = sockinfo->ctx; + return 0; + } + + *cbs = NULL; + *ctx = NULL; + return EBADF; +} /*************************************************************************** * Get/Set tracelevel @@ -328,21 +551,6 @@ const char *ei_getfdcookie(int fd) return r; } -/* call with cookie to set value to use on descriptor fd, -* or specify NULL to use default -*/ -/* FIXME why defined but not used? */ -#if 0 -static int ei_setfdcookie(ei_cnode* ec, int fd, char *cookie) -{ - int dist_version = ei_distversion(fd); - - if (cookie == NULL) - cookie = ec->ei_connect_cookie; - return put_ei_socket_info(fd, dist_version, cookie); -} -#endif - static int get_int32(unsigned char *s) { return ((s[0] << 24) | (s[1] << 16) | (s[2] << 8) | (s[3] )); @@ -395,34 +603,62 @@ static int initWinSock(void) } #endif +static int init_connect(int late) +{ + int error; + + /* + * 'late' is non-zero when not called via ei_init(). Such a + * call is not supported, but we for now save the day if + * it easy to do so; otherwise, return ENOTSUP. + */ + +#ifdef __WIN32__ + if (!initWinSock()) { + EI_TRACE_ERR0("ei_init_connect","can't initiate winsock"); + return EIO; + } +#endif /* win32 */ + + error = init_socket_info(late); + if (error) { + EI_TRACE_ERR0("ei_init_connect","can't initiate socket info"); + return error; + } + + ei_connect_initialized = !0; + return 0; +} + +int ei_init_connect(void) +{ + return init_connect(0); +} + /* * Perhaps run this routine instead of ei_connect_init/2 ? * Initailize by setting: * thishostname, thisalivename, thisnodename and thisipaddr */ -int ei_connect_xinit(ei_cnode* ec, const char *thishostname, - const char *thisalivename, const char *thisnodename, - Erl_IpAddr thisipaddr, const char *cookie, - const short creation) +int ei_connect_xinit_ussi(ei_cnode* ec, const char *thishostname, + const char *thisalivename, const char *thisnodename, + Erl_IpAddr thisipaddr, const char *cookie, + const short creation, ei_socket_callbacks *cbs, + int cbs_sz, void *setup_context) { char *dbglevel; - -/* FIXME this code was enabled for 'erl'_connect_xinit(), why not here? */ -#if 0 -#ifdef __WIN32__ - if (!initWinSock()) { - EI_TRACE_ERR0("ei_connect_xinit","can't initiate winsock"); - return ERL_ERROR; - } -#endif -#endif -#ifdef _REENTRANT - if (ei_sockets_lock == NULL) { - ei_sockets_lock = ei_mutex_create(); - } -#endif /* _REENTRANT */ + if (!ei_connect_initialized) + init_connect(!0); + if (cbs != &ei_default_socket_callbacks) + EI_SET_HAVE_PLUGIN_SOCKET_IMPL__; + + if (cbs_sz < EI_SOCKET_CALLBACKS_SZ_V1) { + EI_TRACE_ERR0("ei_connect_xinit","invalid size of ei_socket_callbacks struct"); + return ERL_ERROR; + } + ec->creation = creation & 0x3; /* 2 bits */ if (cookie) { @@ -464,6 +700,9 @@ int ei_connect_xinit(ei_cnode* ec, const char *thishostname, ec->self.serial = 0; ec->self.creation = creation & 0x3; /* 2 bits */ + ec->cbs = cbs; + ec->setup_context = setup_context; + if ((dbglevel = getenv("EI_TRACELEVEL")) != NULL || (dbglevel = getenv("ERL_DEBUG_DIST")) != NULL) ei_tracelevel = atoi(dbglevel); @@ -471,31 +710,39 @@ int ei_connect_xinit(ei_cnode* ec, const char *thishostname, return 0; } +int ei_connect_xinit(ei_cnode* ec, const char *thishostname, + const char *thisalivename, const char *thisnodename, + Erl_IpAddr thisipaddr, const char *cookie, + const short creation) +{ + return ei_connect_xinit_ussi(ec, thishostname, thisalivename, thisnodename, + thisipaddr, cookie, creation, + &ei_default_socket_callbacks, + sizeof(ei_default_socket_callbacks), + NULL); +} /* * Initialize by set: thishostname, thisalivename, * thisnodename and thisipaddr. At success return 0, * otherwise return -1. */ -int ei_connect_init(ei_cnode* ec, const char* this_node_name, - const char *cookie, short creation) +int ei_connect_init_ussi(ei_cnode* ec, const char* this_node_name, + const char *cookie, short creation, + ei_socket_callbacks *cbs, int cbs_sz, + void *setup_context) { - struct hostent *hp; char thishostname[EI_MAXHOSTNAMELEN+1]; char thisnodename[MAXNODELEN+1]; char thisalivename[EI_MAXALIVELEN+1]; + struct hostent host, *hp; + char buffer[1024]; + char *buf = buffer; + int ei_h_errno; + int res; -#ifdef __WIN32__ - if (!initWinSock()) { - EI_TRACE_ERR0("ei_connect_xinit","can't initiate winsock"); - return ERL_ERROR; - } -#endif /* win32 */ -#ifdef _REENTRANT - if (ei_sockets_lock == NULL) { - ei_sockets_lock = ei_mutex_create(); - } -#endif /* _REENTRANT */ + if (!ei_connect_initialized) + init_connect(!0); /* gethostname requires len to be max(hostname) + 1 */ if (gethostname(thishostname, EI_MAXHOSTNAMELEN+1) == -1) { @@ -517,10 +764,13 @@ int ei_connect_init(ei_cnode* ec, const char* this_node_name, strcpy(thisalivename, this_node_name); } - if ((hp = ei_gethostbyname(thishostname)) == 0) { + hp = dyn_gethostbyname_r(thishostname,&host,&buf,sizeof(buffer),&ei_h_errno); + if (hp == NULL) { /* Looking up IP given hostname fails. We must be on a standalone host so let's use loopback for communication instead. */ - if ((hp = ei_gethostbyname("localhost")) == 0) { + hp = dyn_gethostbyname_r("localhost", &host, &buf, sizeof(buffer), + &ei_h_errno); + if (hp == NULL) { #ifdef __WIN32__ char reason[1024]; @@ -541,48 +791,33 @@ int ei_connect_init(ei_cnode* ec, const char* this_node_name, if (strcmp(hp->h_name, "localhost") == 0) { /* We use a short node name */ if ((ct = strchr(thishostname, '.')) != NULL) *ct = '\0'; - sprintf(thisnodename, "%s@%s", this_node_name, thishostname); } else { /* We use a short node name */ if ((ct = strchr(hp->h_name, '.')) != NULL) *ct = '\0'; strcpy(thishostname, hp->h_name); - sprintf(thisnodename, "%s@%s", this_node_name, hp->h_name); } } - return ei_connect_xinit(ec, thishostname, thisalivename, thisnodename, - (struct in_addr *)*hp->h_addr_list, cookie, creation); + if (strlen(this_node_name) + 1 + strlen(thishostname) > MAXNODELEN) { + EI_TRACE_ERR0("ei_connect_init_ussi","this node name is too long"); + return ERL_ERROR; + } + sprintf(thisnodename, "%s@%s", this_node_name, thishostname); + res = ei_connect_xinit_ussi(ec, thishostname, thisalivename, thisnodename, + (struct in_addr *)*hp->h_addr_list, cookie, creation, + cbs, cbs_sz, setup_context); + if (buf != buffer) + free(buf); + return res; } - -/* connects to port at ip-address ip_addr -* and returns fd to socket -* port has to be in host byte order -*/ -static int cnct(uint16 port, struct in_addr *ip_addr, int addr_len, unsigned ms) +int ei_connect_init(ei_cnode* ec, const char* this_node_name, + const char *cookie, short creation) { - int s, res; - struct sockaddr_in iserv_addr; - - if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) { - erl_errno = errno; - return ERL_ERROR; - } - - memset((char*)&iserv_addr, 0, sizeof(struct sockaddr_in)); - memcpy((char*)&iserv_addr.sin_addr, (char*)ip_addr, addr_len); - iserv_addr.sin_family = AF_INET; - iserv_addr.sin_port = htons(port); - - if ((res = ei_connect_t(s, (struct sockaddr*)&iserv_addr, - sizeof(iserv_addr),ms)) < 0) { - erl_errno = (res == -2) ? ETIMEDOUT : EIO; - closesocket(s); - return ERL_ERROR; - } - - return s; -} /* cnct */ - + return ei_connect_init_ussi(ec, this_node_name, cookie, creation, + &ei_default_socket_callbacks, + sizeof(ei_default_socket_callbacks), + NULL); +} /* * Same as ei_gethostbyname_r, but also handles ERANGE error @@ -595,6 +830,13 @@ struct hostent *dyn_gethostbyname_r(const char *name, int buflen, int *h_errnop) { +#ifdef __WIN32__ + /* + * Apparently ei_gethostbyname_r not implemented for Windows (?) + * Fall back on ei_gethostbyname like before. + */ + return ei_gethostbyname(name); +#else char* buf = *buffer_p; struct hostent *hp; @@ -629,6 +871,7 @@ struct hostent *dyn_gethostbyname_r(const char *name, } } return hp; +#endif } /* @@ -649,6 +892,11 @@ int ei_connect_tmo(ei_cnode* ec, char *nodename, unsigned ms) int ei_h_errno; #endif /* !win32 */ int res; + + if (strlen(nodename) > MAXNODELEN) { + EI_TRACE_ERR0("ei_connect","Too long nodename"); + return ERL_ERROR; + } /* extract the host and alive parts from nodename */ if (!(hostname = strchr(nodename,'@'))) { @@ -735,91 +983,218 @@ int ei_connect(ei_cnode* ec, char *nodename) * the node through epmd at that host * */ -int ei_xconnect_tmo(ei_cnode* ec, Erl_IpAddr adr, char *alivename, unsigned ms) +int ei_xconnect_tmo(ei_cnode* ec, Erl_IpAddr ip_addr, char *alivename, unsigned ms) { - struct in_addr *ip_addr=(struct in_addr *) adr; + ei_socket_callbacks *cbs = ec->cbs; + void *ctx; int rport = 0; /*uint16 rport = 0;*/ int sockd; - int one = 1; int dist = 0; - ErlConnect her_name; unsigned her_flags, her_version; - + unsigned our_challenge, her_challenge; + unsigned char our_digest[16]; + int err; + int pkt_sz; + struct sockaddr_in addr; + unsigned tmo = ms == 0 ? EI_SCLBK_INF_TMO : ms; + erl_errno = EIO; /* Default error code */ EI_TRACE_CONN1("ei_xconnect","-> CONNECT attempt to connect to %s", alivename); - if ((rport = ei_epmd_port_tmo(ip_addr,alivename,&dist, ms)) < 0) { + if ((rport = ei_epmd_port_tmo(ip_addr,alivename,&dist, tmo)) < 0) { EI_TRACE_ERR0("ei_xconnect","-> CONNECT can't get remote port"); /* ei_epmd_port_tmo() has set erl_errno */ return ERL_NO_PORT; } - - /* we now have port number to enode, try to connect */ - if((sockd = cnct((uint16)rport, ip_addr, sizeof(struct in_addr),ms)) < 0) { - EI_TRACE_ERR0("ei_xconnect","-> CONNECT socket connect failed"); - /* cnct() has set erl_errno */ - return ERL_CONNECT_FAIL; - } - - EI_TRACE_CONN0("ei_xconnect","-> CONNECT connected to remote"); - /* FIXME why connect before checking 'dist' output from ei_epmd_port() ?! */ if (dist <= 4) { EI_TRACE_ERR0("ei_xconnect","-> CONNECT remote version not compatible"); - goto error; + return ERL_ERROR; } - else { - unsigned our_challenge, her_challenge; - unsigned char our_digest[16]; - - if (send_name(sockd, ec->thisnodename, (unsigned) dist, ms)) - goto error; - if (recv_status(sockd, ms)) - goto error; - if (recv_challenge(sockd, &her_challenge, &her_version, - &her_flags, &her_name, ms)) - goto error; - our_challenge = gen_challenge(); - gen_digest(her_challenge, ec->ei_connect_cookie, our_digest); - if (send_challenge_reply(sockd, our_digest, our_challenge, ms)) - goto error; - if (recv_challenge_ack(sockd, our_challenge, - ec->ei_connect_cookie, ms)) - goto error; - put_ei_socket_info(sockd, dist, null_cookie, ec); /* FIXME check == 0 */ + + err = ei_socket_ctx__(cbs, &ctx, ec->setup_context); + if (err) { + EI_TRACE_ERR2("ei_xconnect","-> SOCKET failed: %s (%d)", + estr(err), err); + erl_errno = err; + return ERL_CONNECT_FAIL; + } + + memset((void *) &addr, 0, sizeof(struct sockaddr_in)); + memcpy((void *) &addr.sin_addr, (void *) ip_addr, sizeof(addr.sin_addr)); + addr.sin_family = AF_INET; + addr.sin_port = htons(rport); + + err = ei_connect_ctx_t__(cbs, ctx, (void *) &addr, sizeof(addr), tmo); + if (err) { + EI_TRACE_ERR2("ei_xconnect","-> CONNECT socket connect failed: %s (%d)", + estr(err), err); + abort_connection(cbs, ctx); + erl_errno = err; + return ERL_CONNECT_FAIL; } - setsockopt(sockd, IPPROTO_TCP, TCP_NODELAY, (char *)&one, sizeof(one)); - setsockopt(sockd, SOL_SOCKET, SO_KEEPALIVE, (char *)&one, sizeof(one)); + EI_TRACE_CONN0("ei_xconnect","-> CONNECT connected to remote"); - EI_TRACE_CONN1("ei_xconnect","-> CONNECT (ok) remote = %s",alivename); + err = EI_GET_FD__(cbs, ctx, &sockd); + if (err) { + EI_CONN_SAVE_ERRNO__(err); + goto error; + } + + err = cbs->handshake_packet_header_size(ctx, &pkt_sz); + if (err) { + EI_CONN_SAVE_ERRNO__(err); + goto error; + } + + if (send_name(cbs, ctx, pkt_sz, ec->thisnodename, (unsigned) dist, tmo)) + goto error; + if (recv_status(cbs, ctx, pkt_sz, tmo)) + goto error; + if (recv_challenge(cbs, ctx, pkt_sz, &her_challenge, + &her_version, &her_flags, NULL, tmo)) + goto error; + our_challenge = gen_challenge(); + gen_digest(her_challenge, ec->ei_connect_cookie, our_digest); + if (send_challenge_reply(cbs, ctx, pkt_sz, our_digest, our_challenge, tmo)) + goto error; + if (recv_challenge_ack(cbs, ctx, pkt_sz, our_challenge, + ec->ei_connect_cookie, tmo)) + goto error; + if (put_ei_socket_info(sockd, dist, null_cookie, ec, cbs, ctx) != 0) + goto error; + + if (cbs->connect_handshake_complete) { + err = cbs->connect_handshake_complete(ctx); + if (err) { + EI_TRACE_ERR2("ei_xconnect","-> CONNECT failed: %s (%d)", + estr(err), err); + close_connection(cbs, ctx, sockd); + EI_CONN_SAVE_ERRNO__(err); + return ERL_ERROR; + } + } + EI_TRACE_CONN1("ei_xconnect","-> CONNECT (ok) remote = %s",alivename); + erl_errno = 0; return sockd; error: EI_TRACE_ERR0("ei_xconnect","-> CONNECT failed"); - closesocket(sockd); + abort_connection(cbs, ctx); return ERL_ERROR; } /* ei_xconnect */ -int ei_xconnect(ei_cnode* ec, Erl_IpAddr adr, char *alivename) +int ei_xconnect(ei_cnode* ec, Erl_IpAddr ip_addr, char *alivename) { - return ei_xconnect_tmo(ec, adr, alivename, 0); + return ei_xconnect_tmo(ec, ip_addr, alivename, 0); } +int ei_listen(ei_cnode *ec, int *port, int backlog) +{ + struct in_addr ip_addr; + ip_addr.s_addr = htonl(INADDR_ANY); + return ei_xlisten(ec, &ip_addr, port, backlog); +} + +int ei_xlisten(ei_cnode *ec, struct in_addr *ip_addr, int *port, int backlog) +{ + ei_socket_callbacks *cbs = ec->cbs; + struct sockaddr_in sock_addr; + void *ctx; + int fd, err, len; + + err = ei_socket_ctx__(cbs, &ctx, ec->setup_context); + if (err) { + EI_TRACE_ERR2("ei_xlisten","-> SOCKET failed: %s (%d)", + estr(err), err); + erl_errno = err; + return ERL_ERROR; + } + + memset((void *) &sock_addr, 0, sizeof(struct sockaddr_in)); + memcpy((void *) &sock_addr.sin_addr, (void *) ip_addr, sizeof(*ip_addr)); + sock_addr.sin_family = AF_INET; + sock_addr.sin_port = htons((short) *port); + + len = sizeof(sock_addr); + err = ei_listen_ctx__(cbs, ctx, (void *) &sock_addr, &len, backlog); + if (err) { + EI_TRACE_ERR2("ei_xlisten","-> listen failed: %s (%d)", + estr(err), err); + erl_errno = err; + goto error; + } + + if (len != sizeof(sock_addr)) { + if (len < offsetof(struct sockaddr_in, sin_addr) + sizeof(sock_addr.sin_addr) + || len < offsetof(struct sockaddr_in, sin_port) + sizeof(sock_addr.sin_port)) { + erl_errno = EIO; + EI_TRACE_ERR0("ei_xlisten","-> get info failed"); + goto error; + } + } + + memcpy((void *) ip_addr, (void *) &sock_addr.sin_addr, sizeof(*ip_addr)); + *port = (int) ntohs(sock_addr.sin_port); + + err = EI_GET_FD__(cbs, ctx, &fd); + if (err) { + erl_errno = err; + goto error; + } + + if (put_ei_socket_info(fd, 0, null_cookie, ec, cbs, ctx) != 0) { + EI_TRACE_ERR0("ei_xlisten","-> save socket info failed"); + erl_errno = EIO; + goto error; + } + + erl_errno = 0; + + return fd; + +error: + abort_connection(cbs, ctx); + return ERL_ERROR; +} + +static int close_connection(ei_socket_callbacks *cbs, void *ctx, int fd) +{ + int err; + remove_ei_socket_info(fd); + err = ei_close_ctx__(cbs, ctx); + if (err) { + erl_errno = err; + return ERL_ERROR; + } + return 0; +} - /* - * For symmetry reasons -*/ -#if 0 int ei_close_connection(int fd) { - return closesocket(fd); + ei_socket_callbacks *cbs; + void *ctx; + int err = EI_GET_CBS_CTX__(&cbs, &ctx, fd); + if (err) + erl_errno = err; + else { + if (close_connection(cbs, ctx, fd) == 0) + return 0; + } + EI_TRACE_ERR2("ei_close_connection","<- CLOSE socket close failed: %s (%d)", + estr(erl_errno), erl_errno); + return ERL_ERROR; } /* ei_close_connection */ -#endif + +static void abort_connection(ei_socket_callbacks *cbs, void *ctx) +{ + (void) ei_close_ctx__(cbs, ctx); +} /* * Accept and initiate a connection from another @@ -834,25 +1209,71 @@ int ei_accept(ei_cnode* ec, int lfd, ErlConnect *conp) int ei_accept_tmo(ei_cnode* ec, int lfd, ErlConnect *conp, unsigned ms) { int fd; - struct sockaddr_in cli_addr; - int cli_addr_len=sizeof(struct sockaddr_in); unsigned her_version, her_flags; - ErlConnect her_name; + char tmp_nodename[MAXNODELEN+1]; + char *her_name; + int pkt_sz, err; + struct sockaddr_in addr; + int addr_len = sizeof(struct sockaddr_in); + ei_socket_callbacks *cbs; + void *ctx; + unsigned tmo = ms == 0 ? EI_SCLBK_INF_TMO : ms; erl_errno = EIO; /* Default error code */ + + err = EI_GET_CBS_CTX__(&cbs, &ctx, lfd); + if (err) { + EI_CONN_SAVE_ERRNO__(err); + return ERL_ERROR; + } + EI_TRACE_CONN0("ei_accept","<- ACCEPT waiting for connection"); + + if (conp) { + her_name = &conp->nodename[0]; + } + else { + her_name = &tmp_nodename[0]; + } - if ((fd = ei_accept_t(lfd, (struct sockaddr*) &cli_addr, - &cli_addr_len, ms )) < 0) { - EI_TRACE_ERR0("ei_accept","<- ACCEPT socket accept failed"); - erl_errno = (fd == -2) ? ETIMEDOUT : EIO; - goto error; + /* + * ei_accept_ctx_t__() replaces the pointer to the listen context + * with a pointer to the accepted connection context on success. + */ + err = ei_accept_ctx_t__(cbs, &ctx, (void *) &addr, &addr_len, tmo); + if (err) { + EI_TRACE_ERR2("ei_accept","<- ACCEPT socket accept failed: %s (%d)", + estr(err), err); + EI_CONN_SAVE_ERRNO__(err); + return ERL_ERROR; + } + + err = EI_GET_FD__(cbs, ctx, &fd); + if (err) { + EI_TRACE_ERR2("ei_accept","<- ACCEPT get fd failed: %s (%d)", + estr(err), err); + EI_CONN_SAVE_ERRNO__(err); + } + + if (addr_len != sizeof(struct sockaddr_in)) { + if (addr_len < (offsetof(struct sockaddr_in, sin_addr) + + sizeof(addr.sin_addr))) { + EI_TRACE_ERR0("ei_accept","<- ACCEPT get addr failed"); + goto error; + } + } + + err = cbs->handshake_packet_header_size(ctx, &pkt_sz); + if (err) { + EI_TRACE_ERR2("ei_accept","<- ACCEPT get packet size failed: %s (%d)", + estr(err), err); + EI_CONN_SAVE_ERRNO__(err); } EI_TRACE_CONN0("ei_accept","<- ACCEPT connected to remote"); - if (recv_name(fd, &her_version, &her_flags, &her_name, ms)) { + if (recv_name(cbs, ctx, pkt_sz, &her_version, &her_flags, her_name, tmo)) { EI_TRACE_ERR0("ei_accept","<- ACCEPT initial ident failed"); goto error; } @@ -865,34 +1286,45 @@ int ei_accept_tmo(ei_cnode* ec, int lfd, ErlConnect *conp, unsigned ms) unsigned our_challenge; unsigned her_challenge; unsigned char our_digest[16]; - - if (send_status(fd,"ok", ms)) + + if (send_status(cbs, ctx, pkt_sz, "ok", tmo)) goto error; our_challenge = gen_challenge(); - if (send_challenge(fd, ec->thisnodename, - our_challenge, her_version, ms)) + if (send_challenge(cbs, ctx, pkt_sz, ec->thisnodename, + our_challenge, her_version, tmo)) goto error; - if (recv_challenge_reply(fd, our_challenge, - ec->ei_connect_cookie, - &her_challenge, ms)) + if (recv_challenge_reply(cbs, ctx, pkt_sz, our_challenge, + ec->ei_connect_cookie, &her_challenge, tmo)) goto error; gen_digest(her_challenge, ec->ei_connect_cookie, our_digest); - if (send_challenge_ack(fd, our_digest, ms)) + if (send_challenge_ack(cbs, ctx, pkt_sz, our_digest, tmo)) goto error; - put_ei_socket_info(fd, her_version, null_cookie, ec); + if (put_ei_socket_info(fd, her_version, null_cookie, ec, cbs, ctx) != 0) + goto error; + } + if (conp) { + memcpy((void *) conp->ipadr, (void *) &addr.sin_addr, sizeof(conp->ipadr)); + } + + if (cbs->accept_handshake_complete) { + err = cbs->accept_handshake_complete(ctx); + if (err) { + EI_TRACE_ERR2("ei_xconnect","-> ACCEPT handshake failed: %s (%d)", + estr(err), err); + close_connection(cbs, ctx, fd); + EI_CONN_SAVE_ERRNO__(err); + return ERL_ERROR; + } } - if (conp) - *conp = her_name; - EI_TRACE_CONN1("ei_accept","<- ACCEPT (ok) remote = %s",her_name.nodename); + EI_TRACE_CONN1("ei_accept","<- ACCEPT (ok) remote = %s",her_name); erl_errno = 0; /* No error */ return fd; error: EI_TRACE_ERR0("ei_accept","<- ACCEPT failed"); - if (fd>=0) - closesocket(fd); + abort_connection(cbs, ctx); return ERL_ERROR; } /* ei_accept */ @@ -904,36 +1336,57 @@ error: */ int ei_receive_tmo(int fd, unsigned char *bufp, int bufsize, unsigned ms) { - int len; + ssize_t len; unsigned char fourbyte[4]={0,0,0,0}; - int res; - - if ((res = ei_read_fill_t(fd, (char *) bufp, 4, ms)) != 4) { - erl_errno = (res == -2) ? ETIMEDOUT : EIO; + int err; + ei_socket_callbacks *cbs; + void *ctx; + unsigned tmo = ms == 0 ? EI_SCLBK_INF_TMO : ms; + + err = EI_GET_CBS_CTX__(&cbs, &ctx, fd); + if (err) { + EI_CONN_SAVE_ERRNO__(err); + return ERL_ERROR; + } + + len = (ssize_t) 4; + err = ei_read_fill_ctx_t__(cbs, ctx, (char *) bufp, &len, tmo); + if (!err && len != (ssize_t) 4) + err = EIO; + if (err) { + EI_CONN_SAVE_ERRNO__(err); return ERL_ERROR; } /* Tick handling */ - if ((len = get_int32(bufp)) == ERL_TICK) - { - ei_write_fill_t(fd, (char *) fourbyte, 4, ms); + len = get_int32(bufp); + if (len == ERL_TICK) { + len = 4; + ei_write_fill_ctx_t__(cbs, ctx, (char *) fourbyte, &len, tmo); /* FIXME ok to ignore error or timeout? */ erl_errno = EAGAIN; return ERL_TICK; } - else if (len > bufsize) - { + + if (len > bufsize) { /* FIXME: We should drain the message. */ erl_errno = EMSGSIZE; return ERL_ERROR; } - else if ((res = ei_read_fill_t(fd, (char *) bufp, len, ms)) != len) - { - erl_errno = (res == -2) ? ETIMEDOUT : EIO; - return ERL_ERROR; + else { + ssize_t need = len; + err = ei_read_fill_ctx_t__(cbs, ctx, (char *) bufp, &len, tmo); + if (err) { + EI_CONN_SAVE_ERRNO__(err); + return ERL_ERROR; + } + if (len != need) { + erl_errno = EIO; + return ERL_ERROR; + } } - return len; + return (int) len; } @@ -999,7 +1452,7 @@ int ei_do_receive_msg(int fd, int staticbuffer_p, erl_errno = EMSGSIZE; return ERL_ERROR; } - x->index = x->buffsz; + x->index = msglen; switch (msg->msgtype) { /* FIXME does not handle trace tokens and monitors */ case ERL_SEND: case ERL_REG_SEND: @@ -1089,36 +1542,11 @@ int ei_rpc_to(ei_cnode *ec, int fd, char *mod, char *fun, int ei_rpc_from(ei_cnode *ec, int fd, int timeout, erlang_msg *msg, ei_x_buff *x) { - fd_set readmask; - struct timeval tv; - struct timeval *t = NULL; - - if (timeout >= 0) { - tv.tv_sec = timeout / 1000; - tv.tv_usec = (timeout % 1000) * 1000; - t = &tv; - } - - FD_ZERO(&readmask); - FD_SET(fd,&readmask); - - switch (select(fd+1, &readmask, NULL, NULL, t)) { - case -1: - erl_errno = EIO; - return ERL_ERROR; - - case 0: - erl_errno = ETIMEDOUT; - return ERL_TIMEOUT; - - default: - if (FD_ISSET(fd, &readmask)) { - return ei_xreceive_msg(fd, msg, x); - } else { - erl_errno = EIO; - return ERL_ERROR; - } - } + unsigned tmo = timeout < 0 ? EI_SCLBK_INF_TMO : (unsigned) timeout; + int res = ei_xreceive_msg_tmo(fd, msg, x, tmo); + if (res < 0 && erl_errno == ETIMEDOUT) + return ERL_TIMEOUT; + return res; } /* rpc_from */ /* @@ -1272,19 +1700,34 @@ static char *hex(char digest[16], char buff[33]) return buff; } -static int read_2byte_package(int fd, char **buf, int *buflen, - int *is_static, unsigned ms) +static int read_hs_package(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, char **buf, int *buflen, + int *is_static, unsigned ms) { - unsigned char nbuf[2]; + unsigned char nbuf[4]; unsigned char *x = nbuf; - unsigned len; - int res; - - if((res = ei_read_fill_t(fd, (char *)nbuf, 2, ms)) != 2) { - erl_errno = (res == -2) ? ETIMEDOUT : EIO; + ssize_t len, need; + int err; + + len = (ssize_t) pkt_sz; + err = ei_read_fill_ctx_t__(cbs, ctx, (char *)nbuf, &len, ms); + if (!err && len != (ssize_t) pkt_sz) + err = EIO; + if (err) { + EI_CONN_SAVE_ERRNO__(err); return -1; } - len = get16be(x); + + switch (pkt_sz) { + case 2: + len = get16be(x); + break; + case 4: + len = get32be(x); + break; + default: + return -1; + } if (len > *buflen) { if (*is_static) { @@ -1306,20 +1749,26 @@ static int read_2byte_package(int fd, char **buf, int *buflen, *buflen = len; } } - if ((res = ei_read_fill_t(fd, *buf, len, ms)) != len) { - erl_errno = (res == -2) ? ETIMEDOUT : EIO; + need = len; + err = ei_read_fill_ctx_t__(cbs, ctx, *buf, &len, ms); + if (!err && len != need) + err = EIO; + if (err) { + EI_CONN_SAVE_ERRNO__(err); return -1; } return len; } -static int send_status(int fd, char *status, unsigned ms) +static int send_status(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, char *status, unsigned ms) { char *buf, *s; char dbuf[DEFBUF_SIZ]; - int siz = strlen(status) + 1 + 2; - int res; + int siz = strlen(status) + 1 + pkt_sz; + int err; + ssize_t len; buf = (siz > DEFBUF_SIZ) ? malloc(siz) : dbuf; if (!buf) { @@ -1327,14 +1776,28 @@ static int send_status(int fd, char *status, unsigned ms) return -1; } s = buf; - put16be(s,siz - 2); + switch (pkt_sz) { + case 2: + put16be(s,siz - 2); + break; + case 4: + put32be(s,siz - 4); + break; + default: + return -1; + } put8(s, 's'); memcpy(s, status, strlen(status)); - if ((res = ei_write_fill_t(fd, buf, siz, ms)) != siz) { - EI_TRACE_ERR0("send_status","-> SEND_STATUS socket write failed"); + len = (ssize_t) siz; + err = ei_write_fill_ctx_t__(cbs, ctx, buf, &len, ms); + if (!err && len != (ssize_t) siz) + err = EIO; + if (err) { + EI_TRACE_ERR2("send_status","-> SEND_STATUS socket write failed: %s (%d)", + estr(err), err); if (buf != dbuf) - free(buf); - erl_errno = (res == -2) ? ETIMEDOUT : EIO; + free(buf); + EI_CONN_SAVE_ERRNO__(err); return -1; } EI_TRACE_CONN1("send_status","-> SEND_STATUS (%s)",status); @@ -1344,7 +1807,8 @@ static int send_status(int fd, char *status, unsigned ms) return 0; } -static int recv_status(int fd, unsigned ms) +static int recv_status(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned ms) { char dbuf[DEFBUF_SIZ]; char *buf = dbuf; @@ -1352,16 +1816,20 @@ static int recv_status(int fd, unsigned ms) int buflen = DEFBUF_SIZ; int rlen; - if ((rlen = read_2byte_package(fd, &buf, &buflen, &is_static, ms)) <= 0) { + if ((rlen = read_hs_package(cbs, ctx, pkt_sz, + &buf, &buflen, &is_static, ms)) <= 0) { EI_TRACE_ERR1("recv_status", "<- RECV_STATUS socket read failed (%d)", rlen); goto error; } - if (rlen == 3 && buf[0] == 's' && buf[1] == 'o' && - buf[2] == 'k') { + + EI_TRACE_CONN2("recv_status", + "<- RECV_STATUS (%.*s)", (rlen>20 ? 20 : rlen), buf); + + if (rlen >= 3 && buf[0] == 's' && buf[1] == 'o' && buf[2] == 'k') { + /* Expecting "sok" or "sok_simultaneous" */ if (!is_static) free(buf); - EI_TRACE_CONN0("recv_status","<- RECV_STATUS (ok)"); return 0; } error: @@ -1370,7 +1838,10 @@ error: return -1; } -static int send_name_or_challenge(int fd, char *nodename, +static int send_name_or_challenge(ei_socket_callbacks *cbs, + void *ctx, + int pkt_sz, + char *nodename, int f_chall, unsigned challenge, unsigned version, @@ -1379,9 +1850,10 @@ static int send_name_or_challenge(int fd, char *nodename, char *buf; unsigned char *s; char dbuf[DEFBUF_SIZ]; - int siz = 2 + 1 + 2 + 4 + strlen(nodename); + int siz = pkt_sz + 1 + 2 + 4 + strlen(nodename); const char* function[] = {"SEND_NAME", "SEND_CHALLENGE"}; - int res; + int err; + ssize_t len; if (f_chall) siz += 4; @@ -1391,7 +1863,16 @@ static int send_name_or_challenge(int fd, char *nodename, return -1; } s = (unsigned char *)buf; - put16be(s,siz - 2); + switch (pkt_sz) { + case 2: + put16be(s,siz - 2); + break; + case 4: + put32be(s,siz - 4); + break; + default: + return -1; + } put8(s, 'n'); put16be(s, version); put32be(s, (DFLAG_EXTENDED_REFERENCES @@ -1407,13 +1888,16 @@ static int send_name_or_challenge(int fd, char *nodename, if (f_chall) put32be(s, challenge); memcpy(s, nodename, strlen(nodename)); - - if ((res = ei_write_fill_t(fd, buf, siz, ms)) != siz) { + len = (ssize_t) siz; + err = ei_write_fill_ctx_t__(cbs, ctx, buf, &len, ms); + if (!err && len != (ssize_t) siz) + err = EIO; + if (err) { EI_TRACE_ERR1("send_name_or_challenge", "-> %s socket write failed", function[f_chall]); if (buf != dbuf) free(buf); - erl_errno = (res == -2) ? ETIMEDOUT : EIO; + EI_CONN_SAVE_ERRNO__(err); return -1; } @@ -1422,9 +1906,9 @@ static int send_name_or_challenge(int fd, char *nodename, return 0; } -static int recv_challenge(int fd, unsigned *challenge, - unsigned *version, - unsigned *flags, ErlConnect *namebuf, unsigned ms) +static int recv_challenge(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned *challenge, unsigned *version, + unsigned *flags, char *namebuf, unsigned ms) { char dbuf[DEFBUF_SIZ]; char *buf = dbuf; @@ -1432,13 +1916,13 @@ static int recv_challenge(int fd, unsigned *challenge, int buflen = DEFBUF_SIZ; int rlen; char *s; - struct sockaddr_in sin; - socklen_t sin_len = sizeof(sin); char tag; - + char tmp_nodename[MAXNODELEN+1]; + erl_errno = EIO; /* Default */ - if ((rlen = read_2byte_package(fd, &buf, &buflen, &is_static, ms)) <= 0) { + if ((rlen = read_hs_package(cbs, ctx, pkt_sz, &buf, &buflen, + &is_static, ms)) <= 0) { EI_TRACE_ERR1("recv_challenge", "<- RECV_CHALLENGE socket read failed (%d)",rlen); goto error; @@ -1479,22 +1963,19 @@ static int recv_challenge(int fd, unsigned *challenge, goto error; } - if (getpeername(fd, (struct sockaddr *) &sin, &sin_len) < 0) { - EI_TRACE_ERR0("recv_challenge","<- RECV_CHALLENGE can't get peername"); - erl_errno = errno; - goto error; - } - memcpy(namebuf->ipadr, &(sin.sin_addr.s_addr), - sizeof(sin.sin_addr.s_addr)); - memcpy(namebuf->nodename, s, rlen - 11); - namebuf->nodename[rlen - 11] = '\0'; + if (!namebuf) + namebuf = &tmp_nodename[0]; + + memcpy(namebuf, s, rlen - 11); + namebuf[rlen - 11] = '\0'; + if (!is_static) free(buf); EI_TRACE_CONN4("recv_challenge","<- RECV_CHALLENGE (ok) node = %s, " "version = %u, " "flags = %u, " "challenge = %d", - namebuf->nodename, + namebuf, *version, *flags, *challenge @@ -1507,24 +1988,40 @@ error: return -1; } -static int send_challenge_reply(int fd, unsigned char digest[16], +static int send_challenge_reply(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned char digest[16], unsigned challenge, unsigned ms) { char *s; char buf[DEFBUF_SIZ]; - int siz = 2 + 1 + 4 + 16; - int res; + int siz = pkt_sz + 1 + 4 + 16; + int err; + ssize_t len; s = buf; - put16be(s,siz - 2); + switch (pkt_sz) { + case 2: + put16be(s,siz - 2); + break; + case 4: + put32be(s,siz - 4); + break; + default: + return -1; + } put8(s, 'r'); put32be(s, challenge); memcpy(s, digest, 16); - - if ((res = ei_write_fill_t(fd, buf, siz, ms)) != siz) { - EI_TRACE_ERR0("send_challenge_reply", - "-> SEND_CHALLENGE_REPLY socket write failed"); - erl_errno = (res == -2) ? ETIMEDOUT : EIO; + + len = (ssize_t) siz; + err = ei_write_fill_ctx_t__(cbs, ctx, buf, &len, ms); + if (!err && len != (ssize_t) siz) + err = EIO; + if (err) { + EI_TRACE_ERR2("send_challenge_reply", + "-> SEND_CHALLENGE_REPLY socket write failed: %s (%d)", + estr(err), err); + EI_CONN_SAVE_ERRNO__(err); return -1; } @@ -1537,11 +2034,13 @@ static int send_challenge_reply(int fd, unsigned char digest[16], return 0; } -static int recv_challenge_reply (int fd, - unsigned our_challenge, - char cookie[], - unsigned *her_challenge, - unsigned ms) +static int recv_challenge_reply(ei_socket_callbacks *cbs, + void *ctx, + int pkt_sz, + unsigned our_challenge, + char cookie[], + unsigned *her_challenge, + unsigned ms) { char dbuf[DEFBUF_SIZ]; char *buf = dbuf; @@ -1554,7 +2053,7 @@ static int recv_challenge_reply (int fd, erl_errno = EIO; /* Default */ - if ((rlen = read_2byte_package(fd, &buf, &buflen, &is_static, ms)) != 21) { + if ((rlen = read_hs_package(cbs, ctx, pkt_sz, &buf, &buflen, &is_static, ms)) != 21) { EI_TRACE_ERR1("recv_challenge_reply", "<- RECV_CHALLENGE_REPLY socket read failed (%d)",rlen); goto error; @@ -1594,23 +2093,38 @@ error: return -1; } -static int send_challenge_ack(int fd, unsigned char digest[16], unsigned ms) +static int send_challenge_ack(ei_socket_callbacks *cbs, void *ctx, int pkt_sz, + unsigned char digest[16], unsigned ms) { char *s; char buf[DEFBUF_SIZ]; - int siz = 2 + 1 + 16; - int res; + int siz = pkt_sz + 1 + 16; + int err; + ssize_t len; s = buf; - - put16be(s,siz - 2); + switch (pkt_sz) { + case 2: + put16be(s,siz - 2); + break; + case 4: + put32be(s,siz - 4); + break; + default: + return -1; + } put8(s, 'a'); memcpy(s, digest, 16); - if ((res = ei_write_fill_t(fd, buf, siz, ms)) != siz) { - EI_TRACE_ERR0("recv_challenge_reply", - "-> SEND_CHALLENGE_ACK socket write failed"); - erl_errno = (res == -2) ? ETIMEDOUT : EIO; + len = (ssize_t) siz; + err = ei_write_fill_ctx_t__(cbs, ctx, buf, &len, ms); + if (!err && len != (ssize_t) siz) + err = EIO; + if (err) { + EI_TRACE_ERR2("recv_challenge_reply", + "-> SEND_CHALLENGE_ACK socket write failed: %s (%d)", + estr(err), err); + EI_CONN_SAVE_ERRNO__(err); return -1; } @@ -1623,8 +2137,8 @@ static int send_challenge_ack(int fd, unsigned char digest[16], unsigned ms) return 0; } -static int recv_challenge_ack(int fd, - unsigned our_challenge, +static int recv_challenge_ack(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned our_challenge, char cookie[], unsigned ms) { char dbuf[DEFBUF_SIZ]; @@ -1638,7 +2152,7 @@ static int recv_challenge_ack(int fd, erl_errno = EIO; /* Default */ - if ((rlen = read_2byte_package(fd, &buf, &buflen, &is_static, ms)) != 17) { + if ((rlen = read_hs_package(cbs, ctx, pkt_sz, &buf, &buflen, &is_static, ms)) != 17) { EI_TRACE_ERR1("recv_challenge_ack", "<- RECV_CHALLENGE_ACK socket read failed (%d)",rlen); goto error; @@ -1675,20 +2189,24 @@ error: return -1; } -static int send_name(int fd, char *nodename, unsigned version, unsigned ms) +static int send_name(ei_socket_callbacks *cbs, void *ctx, int pkt_sz, + char *nodename, unsigned version, unsigned ms) { - return send_name_or_challenge(fd, nodename, 0, 0, version, ms); + return send_name_or_challenge(cbs, ctx, pkt_sz, nodename, 0, + 0, version, ms); } -static int send_challenge(int fd, char *nodename, - unsigned challenge, unsigned version, unsigned ms) +static int send_challenge(ei_socket_callbacks *cbs, void *ctx, int pkt_sz, + char *nodename, unsigned challenge, unsigned version, + unsigned ms) { - return send_name_or_challenge(fd, nodename, 1, challenge, version, ms); + return send_name_or_challenge(cbs, ctx, pkt_sz, nodename, 1, + challenge, version, ms); } -static int recv_name(int fd, - unsigned *version, - unsigned *flags, ErlConnect *namebuf, unsigned ms) +static int recv_name(ei_socket_callbacks *cbs, void *ctx, + int pkt_sz, unsigned *version, + unsigned *flags, char *namebuf, unsigned ms) { char dbuf[DEFBUF_SIZ]; char *buf = dbuf; @@ -1696,13 +2214,13 @@ static int recv_name(int fd, int buflen = DEFBUF_SIZ; int rlen; char *s; - struct sockaddr_in sin; - socklen_t sin_len = sizeof(sin); + char tmp_nodename[MAXNODELEN+1]; char tag; erl_errno = EIO; /* Default */ - if ((rlen = read_2byte_package(fd, &buf, &buflen, &is_static, ms)) <= 0) { + if ((rlen = read_hs_package(cbs, ctx, pkt_sz, &buf, &buflen, + &is_static, ms)) <= 0) { EI_TRACE_ERR1("recv_name","<- RECV_NAME socket read failed (%d)",rlen); goto error; } @@ -1733,21 +2251,18 @@ static int recv_name(int fd, erl_errno = EIO; goto error; } - - if (getpeername(fd, (struct sockaddr *) &sin, &sin_len) < 0) { - EI_TRACE_ERR0("recv_name","<- RECV_NAME can't get peername"); - erl_errno = errno; - goto error; - } - memcpy(namebuf->ipadr, &(sin.sin_addr.s_addr), - sizeof(sin.sin_addr.s_addr)); - memcpy(namebuf->nodename, s, rlen - 7); - namebuf->nodename[rlen - 7] = '\0'; + + if (!namebuf) + namebuf = &tmp_nodename[0]; + + memcpy(namebuf, s, rlen - 7); + namebuf[rlen - 7] = '\0'; + if (!is_static) free(buf); EI_TRACE_CONN3("recv_name", "<- RECV_NAME (ok) node = %s, version = %u, flags = %u", - namebuf->nodename,*version,*flags); + namebuf,*version,*flags); erl_errno = 0; return 0; @@ -1841,3 +2356,4 @@ static int get_cookie(char *buf, int bufsize) return 1; /* Success! */ } + |