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resolved: tighten the rules a bit on valid DNS-SD service identifiers

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Let's insist that the ID is suitable for inclusion in a filename, as one
of the most basic of requirements.
This commit is contained in:
Lennart Poettering 2024-04-22 12:32:54 +02:00
parent 0ef0e2691a
commit c903d3df6f
1 changed files with 7 additions and 3 deletions
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10
src/resolve/resolved-bus.c
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@ -11,6 +11,7 @@
#include "format-util.h"
#include "memory-util.h"
#include "missing_capability.h"
#include "path-util.h"
#include "resolved-bus.h"
#include "resolved-def.h"
#include "resolved-dns-stream.h"
@ -1898,13 +1899,16 @@ static int bus_method_register_service(sd_bus_message *message, void *userdata,
if (r < 0)
return r;
s = hashmap_get(m->dnssd_services, id);
if (s)
return sd_bus_error_setf(error, BUS_ERROR_DNSSD_SERVICE_EXISTS, "DNS-SD service '%s' exists already", id);
if (!filename_part_is_valid(id))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "DNS-SD service identifier '%s' is invalid", id);
if (!dnssd_srv_type_is_valid(type))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "DNS-SD service type '%s' is invalid", type);
s = hashmap_get(m->dnssd_services, id);
if (s)
return sd_bus_error_setf(error, BUS_ERROR_DNSSD_SERVICE_EXISTS, "DNS-SD service '%s' exists already", id);
service->id = strdup(id);
if (!service->id)
return log_oom();