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author | Nikias Bassen | 2021-01-10 03:25:02 +0100 |
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committer | Nikias Bassen | 2021-01-10 03:25:02 +0100 |
commit | 6b3e64140419013834589dfcff25cbf9af1b6168 (patch) | |
tree | 0f8f2ef2e1e6b9db2c9ad3788fe0b80478b01af2 /src/main.c | |
parent | ecb81751f14af6699aef2ea03d54ec08401a40d5 (diff) | |
download | usbmuxd-6b3e64140419013834589dfcff25cbf9af1b6168.tar.gz usbmuxd-6b3e64140419013834589dfcff25cbf9af1b6168.tar.bz2 |
Allow specifying a custom listen address:port or unix socket
Diffstat (limited to 'src/main.c')
-rw-r--r-- | src/main.c | 187 |
1 files changed, 167 insertions, 20 deletions
@@ -1,7 +1,7 @@ /* * main.c * - * Copyright (C) 2009-2019 Nikias Bassen <nikias@gmx.li> + * Copyright (C) 2009-2021 Nikias Bassen <nikias@gmx.li> * Copyright (C) 2013-2014 Martin Szulecki <m.szulecki@libimobiledevice.org> * Copyright (C) 2009 Hector Martin <hector@marcansoft.com> * Copyright (C) 2009 Paul Sladen <libiphone@paul.sladen.org> @@ -36,6 +36,9 @@ #include <unistd.h> #include <sys/socket.h> #include <sys/un.h> +#include <netinet/in.h> +#include <netdb.h> +#include <arpa/inet.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/resource.h> @@ -69,22 +72,162 @@ static int opt_enable_exit = 0; static int opt_exit = 0; static int exit_signal = 0; static int daemon_pipe; +static const char *listen_addr = NULL; static int report_to_parent = 0; -static int create_socket(void) { - struct sockaddr_un bind_addr; +static int create_socket(void) +{ int listenfd; + const char* socket_addr = socket_path; + const char* tcp_port; + char listen_addr_str[256]; + + if (listen_addr) { + socket_addr = listen_addr; + } + tcp_port = strrchr(socket_addr, ':'); + if (tcp_port) { + tcp_port++; + size_t nlen = tcp_port - socket_addr; + char* hostname = malloc(nlen); + struct addrinfo hints; + struct addrinfo *result, *rp; + int yes = 1; + int res; + + strncpy(hostname, socket_addr, nlen-1); + hostname[nlen-1] = '\0'; + + memset(&hints, '\0', sizeof(struct addrinfo)); + hints.ai_family = AF_UNSPEC; + hints.ai_socktype = SOCK_STREAM; + hints.ai_flags = AI_PASSIVE | AI_NUMERICSERV; + hints.ai_protocol = IPPROTO_TCP; + + res = getaddrinfo(hostname, tcp_port, &hints, &result); + free(hostname); + if (res != 0) { + usbmuxd_log(LL_FATAL, "%s: getaddrinfo() failed: %s\n", __func__, gai_strerror(res)); + return -1; + } - if(unlink(socket_path) == -1 && errno != ENOENT) { - usbmuxd_log(LL_FATAL, "unlink(%s) failed: %s", socket_path, strerror(errno)); - return -1; - } + for (rp = result; rp != NULL; rp = rp->ai_next) { + listenfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol); + if (listenfd == -1) { + listenfd = -1; + continue; + } - listenfd = socket(AF_UNIX, SOCK_STREAM, 0); - if (listenfd == -1) { - usbmuxd_log(LL_FATAL, "socket() failed: %s", strerror(errno)); - return -1; + if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, (void*)&yes, sizeof(int)) == -1) { + usbmuxd_log(LL_ERROR, "%s: setsockopt(): %s", __func__, strerror(errno)); + close(listenfd); + listenfd = -1; + continue; + } + +#ifdef SO_NOSIGPIPE + if (setsockopt(listenfd, SOL_SOCKET, SO_NOSIGPIPE, (void*)&yes, sizeof(int)) == -1) { + usbmuxd_log(LL_ERROR, "%s: setsockopt(): %s", __func__, strerror(errno)); + close(listenfd); + listenfd = -1; + continue; + } +#endif + +#if defined(AF_INET6) && defined(IPV6_V6ONLY) + if (rp->ai_family == AF_INET6) { + if (setsockopt(listenfd, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&yes, sizeof(int)) == -1) { + usbmuxd_log(LL_ERROR, "%s: setsockopt() IPV6_V6ONLY: %s", __func__, strerror(errno)); + } + } +#endif + + if (bind(listenfd, rp->ai_addr, rp->ai_addrlen) < 0) { + usbmuxd_log(LL_FATAL, "%s: bind() failed: %s", __func__, strerror(errno)); + close(listenfd); + listenfd = -1; + continue; + } + + const void *addrdata = NULL; + if (rp->ai_family == AF_INET) { + addrdata = &((struct sockaddr_in*)rp->ai_addr)->sin_addr; + } +#ifdef AF_INET6 + else if (rp->ai_family == AF_INET6) { + addrdata = &((struct sockaddr_in6*)rp->ai_addr)->sin6_addr; + } +#endif + if (addrdata) { + char* endp = NULL; + uint16_t listen_port = 0; + if (rp->ai_family == AF_INET) { + listen_port = ntohs(((struct sockaddr_in*)rp->ai_addr)->sin_port); + if (inet_ntop(AF_INET, addrdata, listen_addr_str, sizeof(listen_addr_str)-6)) { + endp = &listen_addr_str[0] + strlen(listen_addr_str); + } + } +#ifdef AF_INET6 + else if (rp->ai_family == AF_INET6) { + listen_port = ntohs(((struct sockaddr_in6*)rp->ai_addr)->sin6_port); + listen_addr_str[0] = '['; + if (inet_ntop(AF_INET6, addrdata, listen_addr_str+1, sizeof(listen_addr_str)-8)) { + endp = &listen_addr_str[0] + strlen(listen_addr_str); + } + if (endp) { + *endp = ']'; + endp++; + } + } +#endif + if (endp) { + sprintf(endp, ":%u", listen_port); + } + } + break; + } + freeaddrinfo(result); + if (listenfd == -1) { + usbmuxd_log(LL_FATAL, "%s: Failed to create listening socket", __func__); + return -1; + } + } else { + struct sockaddr_un bind_addr; + + if (strcmp(socket_addr, socket_path) != 0) { + struct stat fst; + if (stat(socket_addr, &fst) == 0) { + if (!S_ISSOCK(fst.st_mode)) { + usbmuxd_log(LL_FATAL, "FATAL: File '%s' already exists and is not a socket file. Refusing to continue.", socket_addr); + return -1; + } + } + } + + if (unlink(socket_addr) == -1 && errno != ENOENT) { + usbmuxd_log(LL_FATAL, "%s: unlink(%s) failed: %s", __func__, socket_addr, strerror(errno)); + return -1; + } + + listenfd = socket(AF_UNIX, SOCK_STREAM, 0); + if (listenfd == -1) { + usbmuxd_log(LL_FATAL, "socket() failed: %s", strerror(errno)); + return -1; + } + + bzero(&bind_addr, sizeof(bind_addr)); + bind_addr.sun_family = AF_UNIX; + strncpy(bind_addr.sun_path, socket_addr, sizeof(bind_addr.sun_path)); + bind_addr.sun_path[sizeof(bind_addr.sun_path) - 1] = '\0'; + + if (bind(listenfd, (struct sockaddr*)&bind_addr, sizeof(bind_addr)) != 0) { + usbmuxd_log(LL_FATAL, "bind() failed: %s", strerror(errno)); + return -1; + } + chmod(socket_addr, 0666); + + snprintf(listen_addr_str, sizeof(listen_addr_str), "%s", socket_addr); } int flags = fcntl(listenfd, F_GETFL, 0); @@ -96,21 +239,13 @@ static int create_socket(void) { } } - bzero(&bind_addr, sizeof(bind_addr)); - bind_addr.sun_family = AF_UNIX; - strcpy(bind_addr.sun_path, socket_path); - if (bind(listenfd, (struct sockaddr*)&bind_addr, sizeof(bind_addr)) != 0) { - usbmuxd_log(LL_FATAL, "bind() failed: %s", strerror(errno)); - return -1; - } - // Start listening if (listen(listenfd, 256) != 0) { usbmuxd_log(LL_FATAL, "listen() failed: %s", strerror(errno)); return -1; } - chmod(socket_path, 0666); + usbmuxd_log(LL_INFO, "Listening on %s", listen_addr_str); return listenfd; } @@ -381,6 +516,9 @@ static void usage() #ifdef HAVE_SYSTEMD printf(" -s, --systemd\t\tRun in systemd operation mode (implies -z and -f).\n"); #endif + printf(" -S, --socket ADDR:PORT | PATH Specify source ADDR and PORT or a UNIX\n"); + printf(" \t\tsocket PATH to use for the listening socket.\n"); + printf(" \t\tDefault: %s\n", socket_path); printf(" -x, --exit\t\tNotify a running instance to exit if there are no devices\n"); printf(" \t\tconnected (sends SIGUSR1 to running instance) and exit.\n"); printf(" -X, --force-exit\tNotify a running instance to exit even if there are still\n"); @@ -408,6 +546,7 @@ static void parse_opts(int argc, char **argv) #ifdef HAVE_SYSTEMD {"systemd", no_argument, NULL, 's'}, #endif + {"socket", required_argument, NULL, 'S'}, {"exit", no_argument, NULL, 'x'}, {"force-exit", no_argument, NULL, 'X'}, {"logfile", required_argument, NULL, 'l'}, @@ -468,6 +607,14 @@ static void parse_opts(int argc, char **argv) case 'z': opt_enable_exit = 1; break; + case 'S': + if (!*optarg || *optarg == '-') { + usbmuxd_log(LL_FATAL, "ERROR: --socket requires an argument"); + usage(); + exit(2); + } + listen_addr = optarg; + break; case 'x': opt_exit = 1; exit_signal = SIGUSR1; |