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If the received data is smaller than the device information size, then something is wrong.
19 lines
838 B
C
19 lines
838 B
C
#include "device.h"
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#include "log.h"
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SDL_bool device_read_info(socket_t device_socket, char *device_name, struct size *size) {
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unsigned char buf[DEVICE_NAME_FIELD_LENGTH + 4];
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int r = net_recv(device_socket, buf, sizeof(buf));
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if (r < DEVICE_NAME_FIELD_LENGTH + 4) {
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LOGE("Could not retrieve device information");
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return SDL_FALSE;
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}
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buf[DEVICE_NAME_FIELD_LENGTH - 1] = '\0'; // in case the client sends garbage
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// strcpy is safe here, since name contains at least DEVICE_NAME_FIELD_LENGTH bytes
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// and strlen(buf) < DEVICE_NAME_FIELD_LENGTH
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strcpy(device_name, (char *) buf);
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size->width = (buf[DEVICE_NAME_FIELD_LENGTH] << 8) | buf[DEVICE_NAME_FIELD_LENGTH + 1];
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size->height = (buf[DEVICE_NAME_FIELD_LENGTH + 2] << 8) | buf[DEVICE_NAME_FIELD_LENGTH + 3];
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return SDL_TRUE;
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}
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