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| author | Matthias P. Braendli <matthias.braendli@mpb.li> | 2018-03-01 11:26:11 +0100 |
|---|---|---|
| committer | Matthias P. Braendli <matthias.braendli@mpb.li> | 2018-03-01 11:26:11 +0100 |
| commit | 715705de018f815b3695af983c8d6623ba73a9ae (patch) | |
| tree | 638fcb5eb91a16e331026b308802d2f7be148db7 /src/fig/FIG0_21.cpp | |
| parent | ce26420aee83466cb54bcf07283a8e43af9f775f (diff) | |
| download | dabmux-715705de018f815b3695af983c8d6623ba73a9ae.tar.gz dabmux-715705de018f815b3695af983c8d6623ba73a9ae.tar.bz2 dabmux-715705de018f815b3695af983c8d6623ba73a9ae.zip | |
Fix length of FI freq list check
Diffstat (limited to 'src/fig/FIG0_21.cpp')
| -rw-r--r-- | src/fig/FIG0_21.cpp | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/src/fig/FIG0_21.cpp b/src/fig/FIG0_21.cpp index 1972a19..c9d5fab 100644 --- a/src/fig/FIG0_21.cpp +++ b/src/fig/FIG0_21.cpp @@ -27,6 +27,8 @@ #include "fig/FIG0_21.h" #include "utils.h" +using namespace std; + namespace FIC { struct FIGtype0_21_header { @@ -50,6 +52,14 @@ struct FIGtype0_21_fi_list_header { idHigh = id >> 8; idLow = id & 0xFF; } + + void addToLength(uint8_t increment) { + const uint32_t newlen = length_freq_list + increment; + if (newlen > 0x7) { + throw logic_error("FI freq list too long: " + to_string(newlen)); + } + length_freq_list = newlen; + } } PACKED; struct FIGtype0_21_fi_dab_entry { @@ -209,7 +219,7 @@ FillStatus FIG0_21::fill(uint8_t *buf, size_t max_size) field->setFreq(static_cast<uint32_t>( freq.frequency * 1000.0f / 16.0f)); - fi_list_header->length_freq_list += 3; + fi_list_header->addToLength(3); fig0->Length += 3; buf += 3; remaining -= 3; @@ -226,7 +236,7 @@ FillStatus FIG0_21::fill(uint8_t *buf, size_t max_size) // Do the whole calculation in kHz: *buf = (freq * 1000.0f - 87500.0f) / 100.0f; - fi_list_header->length_freq_list += 1; + fi_list_header->addToLength(1); fig0->Length += 1; buf += 1; remaining -= 1; @@ -240,7 +250,7 @@ FillStatus FIG0_21::fill(uint8_t *buf, size_t max_size) // Id field 2 *buf = (fle.fi_drm.drm_service_id >> 16) & 0xFF; - fi_list_header->length_freq_list += 1; + fi_list_header->addToLength(1); fig0->Length += 1; buf += 1; remaining -= 1; @@ -250,7 +260,7 @@ FillStatus FIG0_21::fill(uint8_t *buf, size_t max_size) buf[0] = freq_field >> 8; buf[1] = freq_field & 0xFF; - fi_list_header->length_freq_list += 2; + fi_list_header->addToLength(2); fig0->Length += 2; buf += 2; remaining -= 2; @@ -264,7 +274,7 @@ FillStatus FIG0_21::fill(uint8_t *buf, size_t max_size) // Id field 2 *buf = (fle.fi_amss.amss_service_id >> 16) & 0xFF; - fi_list_header->length_freq_list += 1; + fi_list_header->addToLength(1); fig0->Length += 1; buf += 1; remaining -= 1; @@ -274,7 +284,7 @@ FillStatus FIG0_21::fill(uint8_t *buf, size_t max_size) buf[0] = freq_field >> 8; buf[1] = freq_field & 0xFF; - fi_list_header->length_freq_list += 2; + fi_list_header->addToLength(2); fig0->Length += 2; buf += 2; remaining -= 2; |