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Merge branch 'rs/daemon-interpolate'
"git daemon" looked up the hostname even when "%CH" and "%IP" interpolations are not requested, which was unnecessary. * rs/daemon-interpolate: daemon: use callback to build interpolated path daemon: look up client-supplied hostname lazily
This commit is contained in:
commit
ef4cdb8bb7
85
daemon.c
85
daemon.c
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@ -61,6 +61,22 @@ static char *canon_hostname;
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static char *ip_address;
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static char *tcp_port;
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static int hostname_lookup_done;
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static void lookup_hostname(void);
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static const char *get_canon_hostname(void)
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{
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lookup_hostname();
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return canon_hostname;
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}
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static const char *get_ip_address(void)
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{
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lookup_hostname();
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return ip_address;
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}
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static void logreport(int priority, const char *err, va_list params)
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{
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if (log_syslog) {
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@ -106,6 +122,46 @@ static void NORETURN daemon_die(const char *err, va_list params)
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exit(1);
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}
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static void strbuf_addstr_or_null(struct strbuf *sb, const char *s)
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{
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if (s)
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strbuf_addstr(sb, s);
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}
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struct expand_path_context {
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const char *directory;
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};
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static size_t expand_path(struct strbuf *sb, const char *placeholder, void *ctx)
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{
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struct expand_path_context *context = ctx;
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switch (placeholder[0]) {
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case 'H':
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strbuf_addstr_or_null(sb, hostname);
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return 1;
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case 'C':
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if (placeholder[1] == 'H') {
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strbuf_addstr_or_null(sb, get_canon_hostname());
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return 2;
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}
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break;
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case 'I':
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if (placeholder[1] == 'P') {
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strbuf_addstr_or_null(sb, get_ip_address());
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return 2;
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}
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break;
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case 'P':
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strbuf_addstr_or_null(sb, tcp_port);
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return 1;
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case 'D':
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strbuf_addstr(sb, context->directory);
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return 1;
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}
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return 0;
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}
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static const char *path_ok(const char *directory)
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{
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static char rpath[PATH_MAX];
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@ -144,14 +200,10 @@ static const char *path_ok(const char *directory)
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}
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else if (interpolated_path && saw_extended_args) {
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struct strbuf expanded_path = STRBUF_INIT;
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struct strbuf_expand_dict_entry dict[6];
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struct expand_path_context context;
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context.directory = directory;
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dict[0].placeholder = "H"; dict[0].value = hostname;
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dict[1].placeholder = "CH"; dict[1].value = canon_hostname;
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dict[2].placeholder = "IP"; dict[2].value = ip_address;
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dict[3].placeholder = "P"; dict[3].value = tcp_port;
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dict[4].placeholder = "D"; dict[4].value = directory;
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dict[5].placeholder = NULL; dict[5].value = NULL;
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if (*dir != '/') {
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/* Allow only absolute */
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logerror("'%s': Non-absolute path denied (interpolated-path active)", dir);
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@ -159,7 +211,7 @@ static const char *path_ok(const char *directory)
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}
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strbuf_expand(&expanded_path, interpolated_path,
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strbuf_expand_dict_cb, &dict);
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expand_path, &context);
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strlcpy(interp_path, expanded_path.buf, PATH_MAX);
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strbuf_release(&expanded_path);
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loginfo("Interpolated dir '%s'", interp_path);
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@ -254,8 +306,8 @@ static int run_access_hook(struct daemon_service *service, const char *dir, cons
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*arg++ = service->name;
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*arg++ = path;
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*arg++ = STRARG(hostname);
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*arg++ = STRARG(canon_hostname);
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*arg++ = STRARG(ip_address);
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*arg++ = STRARG(get_canon_hostname());
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*arg++ = STRARG(get_ip_address());
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*arg++ = STRARG(tcp_port);
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*arg = NULL;
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#undef STRARG
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@ -509,6 +561,7 @@ static void parse_host_arg(char *extra_args, int buflen)
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}
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free(hostname);
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hostname = xstrdup_tolower(host);
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hostname_lookup_done = 0;
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}
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/* On to the next one */
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@ -517,11 +570,14 @@ static void parse_host_arg(char *extra_args, int buflen)
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if (extra_args < end && *extra_args)
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die("Invalid request");
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}
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}
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/*
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* Locate canonical hostname and its IP address.
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*/
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if (hostname) {
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/*
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* Locate canonical hostname and its IP address.
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*/
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static void lookup_hostname(void)
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{
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if (!hostname_lookup_done && hostname) {
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#ifndef NO_IPV6
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struct addrinfo hints;
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struct addrinfo *ai;
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@ -569,6 +625,7 @@ static void parse_host_arg(char *extra_args, int buflen)
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ip_address = xstrdup(addrbuf);
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}
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#endif
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hostname_lookup_done = 1;
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}
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}
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