X-Git-Url: https://git.distorted.org.uk/~mdw/disorder/blobdiff_plain/ff75e16ea3fc8406f49fc8aa1f00407bb0391368..14b5913c9e30978620dbb6f2b85651e8bf7147e9:/lib/client.c diff --git a/lib/client.c b/lib/client.c index 5884e48..0fab347 100644 --- a/lib/client.c +++ b/lib/client.c @@ -1,6 +1,6 @@ /* * This file is part of DisOrder. - * Copyright (C) 2004-2010 Richard Kettlewell + * Copyright (C) 2004-13 Richard Kettlewell * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -25,13 +25,22 @@ #include "common.h" #include -#include -#include -#include -#include +#if HAVE_SYS_SOCKET_H +# include +#endif +#if HAVE_NETINET_IN_H +# include +#endif +#if HAVE_SYS_UN_H +# include +#endif +#if HAVE_UNISTD_H +# include +#endif #include -#include -#include +#if HAVE_NETDB_H +# include +#endif #include "log.h" #include "mem.h" @@ -50,15 +59,15 @@ #include "authhash.h" #include "client-common.h" #include "rights.h" -#include "trackdb.h" #include "kvp.h" +#include "socketio.h" /** @brief Client handle contents */ struct disorder_client { /** @brief Stream to read from */ - FILE *fpin; + struct source *input; /** @brief Stream to write to */ - FILE *fpout; + struct sink *output; /** @brief Peer description */ char *ident; /** @brief Username */ @@ -67,6 +76,14 @@ struct disorder_client { int verbose; /** @brief Last error string */ const char *last; + /** @brief Address family */ + int family; + /** @brief True if open */ + int open; + /** @brief Socket I/O context */ + struct socketio sio; + /** @brief Whether to try to open a privileged connection */ + int trypriv; }; /** @brief Create a new client @@ -81,9 +98,27 @@ disorder_client *disorder_new(int verbose) { disorder_client *c = xmalloc(sizeof (struct disorder_client)); c->verbose = verbose; + c->family = -1; + c->trypriv = 1; return c; } +/** @brief Don't try to make a privileged connection + * @param c Client + * + * You must call this before any of the connection functions (e.g., + * disorder_connect(), disorder_connect_user()), if at all. + */ +void disorder_force_unpriv(disorder_client *c) { + assert(!c->open); + c->trypriv = 0; +} + +/** @brief Return the address family used by this client */ +int disorder_client_af(disorder_client *c) { + return c->family; +} + /** @brief Read a response line * @param c Client * @param rp Where to store response, or NULL (UTF-8) @@ -91,9 +126,11 @@ disorder_client *disorder_new(int verbose) { */ static int response(disorder_client *c, char **rp) { char *r; + char errbuf[1024]; - if(inputline(c->ident, c->fpin, &r, '\n')) { - byte_xasprintf((char **)&c->last, "input error: %s", strerror(errno)); + if(inputlines(c->ident, c->input, &r, '\n')) { + byte_xasprintf((char **)&c->last, "input error: %s", + format_error(c->input->eclass, source_err(c->input), errbuf, sizeof errbuf)); return -1; } D(("response: %s", r)); @@ -151,12 +188,6 @@ static int check_response(disorder_client *c, char **rp) { } } -/** @brief Marker for a command body */ -static const char disorder_body[1]; - -/** @brief Marker for a list of args */ -static const char disorder_list[1]; - /** @brief Issue a command and parse a simple response * @param c Client * @param rp Where to store result, or NULL @@ -172,19 +203,25 @@ static const char disorder_list[1]; * NB that the response will NOT be converted to the local encoding * nor will quotes be stripped. See dequote(). * - * Put @ref disorder_body in the argument list followed by a char ** + * Put @ref disorder__body in the argument list followed by a char ** * and int giving the body to follow the command. If the int is @c -1 * then the list is assumed to be NULL-terminated. This may be used * only once. * - * Put @ref disorder_list in the argument list followed by a char ** + * Put @ref disorder__list in the argument list followed by a char ** * and int giving a list of arguments to include. If the int is @c -1 * then the list is assumed to be NULL-terminated. This may be used * any number of times. * + * Put @ref disorder__integer in the argument list followed by a long to + * send its value in decimal. This may be used any number of times. + * + * Put @ref disorder__time in the argument list followed by a time_t + * to send its value in decimal. This may be used any number of + * times. + * * Usually you would call this via one of the following interfaces: * - disorder_simple() - * - disorder_simple_list() */ static int disorder_simple_v(disorder_client *c, char **rp, @@ -195,8 +232,9 @@ static int disorder_simple_v(disorder_client *c, char **body = NULL; int nbody = 0; int has_body = 0; + char errbuf[1024]; - if(!c->fpout) { + if(!c->open) { c->last = "not connected"; disorder_error(0, "not connected to server"); return -1; @@ -205,21 +243,34 @@ static int disorder_simple_v(disorder_client *c, dynstr_init(&d); dynstr_append_string(&d, cmd); while((arg = va_arg(ap, const char *))) { - if(arg == disorder_body) { + if(arg == disorder__body) { body = va_arg(ap, char **); nbody = va_arg(ap, int); has_body = 1; - } else if(arg == disorder_list) { + } else if(arg == disorder__list) { char **list = va_arg(ap, char **); int nlist = va_arg(ap, int); + int n; if(nlist < 0) { for(nlist = 0; list[nlist]; ++nlist) ; } - for(int n = 0; n < nlist; ++n) { + for(n = 0; n < nlist; ++n) { dynstr_append(&d, ' '); dynstr_append_string(&d, quoteutf8(arg)); } + } else if(arg == disorder__integer) { + long n = va_arg(ap, long); + char buffer[16]; + byte_snprintf(buffer, sizeof buffer, "%ld", n); + dynstr_append(&d, ' '); + dynstr_append_string(&d, buffer); + } else if(arg == disorder__time) { + time_t n = va_arg(ap, time_t); + char buffer[16]; + byte_snprintf(buffer, sizeof buffer, "%lld", (long long)n); + dynstr_append(&d, ' '); + dynstr_append_string(&d, buffer); } else { dynstr_append(&d, ' '); dynstr_append_string(&d, quoteutf8(arg)); @@ -228,32 +279,34 @@ static int disorder_simple_v(disorder_client *c, dynstr_append(&d, '\n'); dynstr_terminate(&d); D(("command: %s", d.vec)); - if(fputs(d.vec, c->fpout) < 0) + if(sink_write(c->output, d.vec, d.nvec) < 0) goto write_error; xfree(d.vec); if(has_body) { + int n; if(nbody < 0) for(nbody = 0; body[nbody]; ++nbody) ; - for(int n = 0; n < nbody; ++n) { + for(n = 0; n < nbody; ++n) { if(body[n][0] == '.') - if(fputc('.', c->fpout) < 0) + if(sink_writec(c->output, '.') < 0) goto write_error; - if(fputs(body[n], c->fpout) < 0) + if(sink_writes(c->output, body[n]) < 0) goto write_error; - if(fputc('\n', c->fpout) < 0) + if(sink_writec(c->output, '\n') < 0) goto write_error; } - if(fputs(".\n", c->fpout) < 0) + if(sink_writes(c->output, ".\n") < 0) goto write_error; } - if(fflush(c->fpout)) + if(sink_flush(c->output)) goto write_error; } return check_response(c, rp); write_error: - byte_xasprintf((char **)&c->last, "write error: %s", strerror(errno)); - disorder_error(errno, "error writing to %s", c->ident); + byte_xasprintf((char **)&c->last, "write error: %s", + format_error(c->output->eclass, sink_err(c->output), errbuf, sizeof errbuf)); + disorder_error(0, "%s: %s", c->ident, c->last); return -1; } @@ -286,6 +339,59 @@ static int disorder_simple(disorder_client *c, return ret; } +/** @brief Issue a command and split the response + * @param c Client + * @param vecp Where to store results + * @param nvecp Where to store count of results + * @param expected Expected count (or -1 to not check) + * @param cmd Command + * @return 0 on success, non-0 on error + * + * The remaining arguments are command arguments, terminated by (char + * *)0. They should be in UTF-8. + * + * 5xx responses count as errors. + * + * @p rp will NOT be filled in for xx9 responses (where it is just + * commentary for a command where it would normally be meaningful). + * + * NB that the response will NOT be converted to the local encoding + * nor will quotes be stripped. See dequote(). + */ +static int disorder_simple_split(disorder_client *c, + char ***vecp, + int *nvecp, + int expected, + const char *cmd, ...) { + va_list ap; + int ret; + char *r; + char **vec; + int nvec; + + va_start(ap, cmd); + ret = disorder_simple_v(c, &r, cmd, ap); + va_end(ap); + if(!ret) { + vec = split(r, &nvec, SPLIT_QUOTES, 0, 0); + xfree(r); + if(expected < 0 || nvec == expected) { + *vecp = vec; + *nvecp = nvec; + } else { + disorder_error(0, "malformed reply to %s", cmd); + c->last = "malformed reply"; + ret = -1; + free_strings(nvec, vec); + } + } + if(ret) { + *vecp = NULL; + *nvecp = 0; + } + return ret; +} + /** @brief Dequote a result string * @param rc 0 on success, non-0 on error * @param rp Where result string is stored (UTF-8) @@ -326,7 +432,8 @@ int disorder_connect_generic(struct config *conf, const char *username, const char *password, const char *cookie) { - int fd = -1, fd2 = -1, nrvec = 0, rc; + SOCKET sd = INVALID_SOCKET; + int nrvec = 0, rc; unsigned char *nonce = NULL; size_t nl; char *res = NULL; @@ -334,37 +441,32 @@ int disorder_connect_generic(struct config *conf, const char *protocol, *algorithm, *challenge; struct sockaddr *sa = NULL; socklen_t salen; + char errbuf[1024]; - if((salen = find_server(conf, &sa, &c->ident)) == (socklen_t)-1) + if((salen = disorder_find_server(conf, + (c->trypriv ? 0 : DISORDER_FS_NOTPRIV), + &sa, &c->ident)) == (socklen_t)-1) return -1; - c->fpin = c->fpout = 0; - if((fd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0) { - byte_xasprintf((char **)&c->last, "socket: %s", strerror(errno)); - disorder_error(errno, "error calling socket"); + c->input = 0; + c->output = 0; + if((sd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0) { + byte_xasprintf((char **)&c->last, "socket: %s", + format_error(ec_socket, socket_error(), errbuf, sizeof errbuf)); + disorder_error(0, "%s", c->last); return -1; } - if(connect(fd, sa, salen) < 0) { - byte_xasprintf((char **)&c->last, "connect: %s", strerror(errno)); - disorder_error(errno, "error calling connect"); - goto error; - } - if((fd2 = dup(fd)) < 0) { - byte_xasprintf((char **)&c->last, "dup: %s", strerror(errno)); - disorder_error(errno, "error calling dup"); - goto error; - } - if(!(c->fpin = fdopen(fd, "rb"))) { - byte_xasprintf((char **)&c->last, "fdopen: %s", strerror(errno)); - disorder_error(errno, "error calling fdopen"); + c->family = sa->sa_family; + if(connect(sd, sa, salen) < 0) { + byte_xasprintf((char **)&c->last, "connect: %s", + format_error(ec_socket, socket_error(), errbuf, sizeof errbuf)); + disorder_error(0, "%s", c->last); goto error; } - fd = -1; - if(!(c->fpout = fdopen(fd2, "wb"))) { - byte_xasprintf((char **)&c->last, "fdopen: %s", strerror(errno)); - disorder_error(errno, "error calling fdopen"); - goto error; - } - fd2 = -1; + socketio_init(&c->sio, sd); + c->open = 1; + sd = INVALID_SOCKET; + c->output = sink_socketio(&c->sio); + c->input = source_socketio(&c->sio); if((rc = disorder_simple(c, &r, 0, (const char *)0))) goto error_rc; if(!(rvec = split(r, &nrvec, SPLIT_QUOTES, 0, 0))) @@ -410,16 +512,12 @@ int disorder_connect_generic(struct config *conf, error: rc = -1; error_rc: - if(c->fpin) { - fclose(c->fpin); - c->fpin = 0; - } - if(c->fpout) { - fclose(c->fpout); - c->fpout = 0; - } - if(fd2 != -1) close(fd2); - if(fd != -1) close(fd); + xfree(c->output); + c->output = NULL; + xfree(c->input); + c->input = NULL; + if(c->open) { socketio_close(&c->sio); c->open = 0; } + if(sd != INVALID_SOCKET) closesocket(sd); return rc; } @@ -456,13 +554,13 @@ int disorder_connect(disorder_client *c) { return -1; } password = config->password; - /* Maybe we can read the database */ - if(!password && trackdb_readable()) { - trackdb_init(TRACKDB_NO_RECOVER|TRACKDB_NO_UPGRADE); - trackdb_open(TRACKDB_READ_ONLY); - password = trackdb_get_password(username); - trackdb_close(); - } + /* If we're connecting as 'root' guess that we're the system root + * user (or the jukebox user), both of which can use the privileged + * socket. They can also furtle with the db directly: that is why + * privileged socket does not represent a privilege escalation. */ + if(!password + && !strcmp(username, "root")) + password = "anything will do for root"; if(!password) { /* Oh well */ c->last = "no password"; @@ -483,7 +581,7 @@ int disorder_connect(disorder_client *c) { * * If @p cookie is NULL or does not work then we attempt to log in as * guest instead (so when the cookie expires only an extra round trip - * is needed rathre than a complete new login). + * is needed rather than a complete new login). */ int disorder_connect_cookie(disorder_client *c, const char *cookie) { @@ -504,22 +602,12 @@ int disorder_connect_cookie(disorder_client *c, int disorder_close(disorder_client *c) { int ret = 0; - if(c->fpin) { - if(fclose(c->fpin) < 0) { - byte_xasprintf((char **)&c->last, "fclose: %s", strerror(errno)); - disorder_error(errno, "error calling fclose"); - ret = -1; - } - c->fpin = 0; - } - if(c->fpout) { - if(fclose(c->fpout) < 0) { - byte_xasprintf((char **)&c->last, "fclose: %s", strerror(errno)); - disorder_error(errno, "error calling fclose"); - ret = -1; - } - c->fpout = 0; - } + if(c->open) + socketio_close(&c->sio); + xfree(c->output); + c->output = NULL; + xfree(c->input); + c->input = NULL; xfree(c->ident); c->ident = 0; xfree(c->user); @@ -557,15 +645,13 @@ static int onequeue(disorder_client *c, const char *cmd, } /** @brief Fetch the queue, recent list, etc */ -static int somequeue(disorder_client *c, - const char *cmd, struct queue_entry **qp) { +static int readqueue(disorder_client *c, + struct queue_entry **qp) { struct queue_entry *qh, **qt = &qh, *q; char *l; - int rc; + char errbuf[1024]; - if((rc = disorder_simple(c, 0, cmd, (char *)0))) - return rc; - while(inputline(c->ident, c->fpin, &l, '\n') >= 0) { + while(inputlines(c->ident, c->input, &l, '\n') >= 0) { if(!strcmp(l, ".")) { *qt = 0; *qp = qh; @@ -579,13 +665,13 @@ static int somequeue(disorder_client *c, } xfree(l); } - if(ferror(c->fpin)) { - byte_xasprintf((char **)&c->last, "input error: %s", strerror(errno)); - disorder_error(errno, "error reading %s", c->ident); + if(source_err(c->input)) { + byte_xasprintf((char **)&c->last, "input error: %s", + format_error(c->input->eclass, source_err(c->input), errbuf, sizeof errbuf)); } else { - c->last = "input error: unexpxected EOF"; - disorder_error(0, "error reading %s: unexpected EOF", c->ident); + c->last = "input error: unexpected EOF"; } + disorder_error(0, "%s: %s", c->ident, c->last); return -1; } @@ -600,9 +686,10 @@ static int somequeue(disorder_client *c, static int readlist(disorder_client *c, char ***vecp, int *nvecp) { char *l; struct vector v; + char errbuf[1024]; vector_init(&v); - while(inputline(c->ident, c->fpin, &l, '\n') >= 0) { + while(inputlines(c->ident, c->input, &l, '\n') >= 0) { if(!strcmp(l, ".")) { vector_terminate(&v); if(nvecp) @@ -614,43 +701,16 @@ static int readlist(disorder_client *c, char ***vecp, int *nvecp) { vector_append(&v, xstrdup(l + (*l == '.'))); xfree(l); } - if(ferror(c->fpin)) { - byte_xasprintf((char **)&c->last, "input error: %s", strerror(errno)); - disorder_error(errno, "error reading %s", c->ident); + if(source_err(c->input)) { + byte_xasprintf((char **)&c->last, "input error: %s", + format_error(c->input->eclass, source_err(c->input), errbuf, sizeof errbuf)); } else { c->last = "input error: unexpxected EOF"; - disorder_error(0, "error reading %s: unexpected EOF", c->ident); } + disorder_error(0, "%s: %s", c->ident, c->last); return -1; } -/** @brief Issue a comamnd and get a list response - * @param c Client - * @param vecp Where to store list (UTF-8) - * @param nvecp Where to store number of items, or NULL - * @param cmd Command - * @return 0 on success, non-0 on error - * - * The remaining arguments are command arguments, terminated by (char - * *)0. They should be in UTF-8. - * - * 5xx responses count as errors. - * - * See disorder_simple(). - */ -static int disorder_simple_list(disorder_client *c, - char ***vecp, int *nvecp, - const char *cmd, ...) { - va_list ap; - int ret; - - va_start(ap, cmd); - ret = disorder_simple_v(c, 0, cmd, ap); - va_end(ap); - if(ret) return ret; - return readlist(c, vecp, nvecp); -} - /** @brief Return the user we logged in with * @param c Client * @return User name (owned by @p c, don't modify) @@ -702,6 +762,10 @@ static int pairlist(disorder_client *c, struct kvp **kp, const char *cmd, ...) { return 0; } +#if _WIN32 +# define boolean bodge_boolean +#endif + /** @brief Parse a boolean response * @param cmd Command for use in error messsage * @param value Result from server @@ -719,41 +783,6 @@ static int boolean(const char *cmd, const char *value, return 0; } -/** @brief Set volume - * @param c Client - * @param left New left channel value - * @param right New right channel value - * @return 0 on success, non-0 on error - */ -int disorder_set_volume(disorder_client *c, int left, int right) { - char *ls, *rs; - - if(byte_asprintf(&ls, "%d", left) < 0 - || byte_asprintf(&rs, "%d", right) < 0) - return -1; - return disorder_simple(c, 0, "volume", ls, rs, (char *)0); -} - -/** @brief Get volume - * @param c Client - * @param left Where to store left channel value - * @param right Where to store right channel value - * @return 0 on success, non-0 on error - */ -int disorder_get_volume(disorder_client *c, int *left, int *right) { - char *r; - int rc; - - if((rc = disorder_simple(c, &r, "volume", (char *)0))) - return rc; - if(sscanf(r, "%d %d", left, right) != 2) { - c->last = "malformed volume response"; - disorder_error(0, "error parsing response to 'volume': '%s'", r); - return -1; - } - return 0; -} - /** @brief Log to a sink * @param c Client * @param s Sink to write log lines to @@ -762,81 +791,22 @@ int disorder_get_volume(disorder_client *c, int *left, int *right) { int disorder_log(disorder_client *c, struct sink *s) { char *l; int rc; + char errbuf[1024]; if((rc = disorder_simple(c, 0, "log", (char *)0))) return rc; - while(inputline(c->ident, c->fpin, &l, '\n') >= 0 && strcmp(l, ".")) + while(inputlines(c->ident, c->input, &l, '\n') >= 0 && strcmp(l, ".")) if(sink_printf(s, "%s\n", l) < 0) return -1; - if(ferror(c->fpin) || feof(c->fpin)) { + if(source_err(c->input)) { byte_xasprintf((char **)&c->last, "input error: %s", - ferror(c->fpin) ? strerror(errno) : "unexpxected EOF"); + format_error(c->input->eclass, source_err(c->input), errbuf, sizeof errbuf)); return -1; - } - return 0; -} - -/** @brief Get server's RTP address information - * @param c Client - * @param addressp Where to store address (UTF-8) - * @param portp Where to store port (UTF-8) - * @return 0 on success, non-0 on error - */ -int disorder_rtp_address(disorder_client *c, char **addressp, char **portp) { - char *r; - int rc, n; - char **vec; - - if((rc = disorder_simple(c, &r, "rtp-address", (char *)0))) - return rc; - vec = split(r, &n, SPLIT_QUOTES, 0, 0); - if(n != 2) { - c->last = "malformed RTP address"; - disorder_error(0, "malformed rtp-address reply"); + } else if(source_eof(c->input)) { + byte_xasprintf((char **)&c->last, "input error: unexpected EOF"); return -1; } - *addressp = vec[0]; - *portp = vec[1]; - return 0; -} - -/** @brief Add a scheduled event - * @param c Client - * @param when When to trigger the event - * @param priority Event priority ("normal" or "junk") - * @param action What action to perform - * @param ... Action-specific arguments - * @return 0 on success, non-0 on error - * - * For action @c "play" the next argument is the track. - * - * For action @c "set-global" next argument is the global preference name - * and the final argument the value to set it to, or (char *)0 to unset it. - */ -int disorder_schedule_add(disorder_client *c, - time_t when, - const char *priority, - const char *action, - ...) { - va_list ap; - char when_str[64]; - int rc; - snprintf(when_str, sizeof when_str, "%lld", (long long)when); - va_start(ap, action); - if(!strcmp(action, "play")) - rc = disorder_simple(c, 0, "schedule-add", when_str, priority, - action, va_arg(ap, char *), - (char *)0); - else if(!strcmp(action, "set-global")) { - const char *key = va_arg(ap, char *); - const char *value = va_arg(ap, char *); - rc = disorder_simple(c, 0,"schedule-add", when_str, priority, - action, key, value, - (char *)0); - } else - disorder_fatal(0, "unknown action '%s'", action); - va_end(ap); - return rc; + return 0; } #include "client-stubs.c"